The resistivity of the wire material is 2.56 × 10⁻⁷ Ωm.
The wire has a length of 11.0 m, a width of 1.6 mm, and a thickness of 0.11 mm. The car battery provides 12.0 V, and the current drawn is 7.5 A.
To find the resistivity, follow these steps:
1. Calculate the resistance (R) using Ohm's law: V = IR.
2. Calculate the cross-sectional area (A) of the wire.
3. Use the formula for resistivity: ρ = RA/L.
Step 1: Calculate the resistance (R).
R = V/I = 12.0 V / 7.5 A = 1.6 Ω
Step 2: Calculate the cross-sectional area (A) of the wire.
A = width × thickness = (1.6 × 10⁻³ m) × (0.11 × 10⁻³ m) = 1.76 × 10⁻⁷ m²
Step 3: Use the formula for resistivity (ρ).
ρ = RA/L = (1.6 Ω)(1.76 × 10⁻⁷ m²) / (11.0 m) = 2.56 × 10⁻⁷ Ωm
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2. for each point graphed in the previous problem, give a different possible set of polar coordinates for the same point. for each point, give a pair of coordinates with a nonnegative radius and a different angle measure from the one given (not just the same angle measure expressed in degrees/radians).
A pair of coordinates with a nonnegative radius and a different angle measure from the one given is a different angle measure for the same point.
To provide a different possible set of polar coordinates for each point graphed in the previous problem, we need to add or subtract multiples of 2π to the angle measure while keeping the radius nonnegative. For each point, we can give a pair of coordinates with a nonnegative radius and a different angle measure from the one given (not just the same angle measure expressed in degrees/radians).
For example, if a point's original polar coordinates were (r, θ), the new polar coordinates could be (r, θ + 2πn), where n is an integer (such as 1, 2, 3, etc.). This would result in a different angle measure for the same point while keeping the radius nonnegative.
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Use polar coordinates to find the volume of the given solid:
Bounded by the paraboloid z=1+2x2 +2y2 andthe plane z=7 in the first octant.
The volume of the given solid is 8/3π.
To find the limits of integration in the polar coordinates.
In the first octant, we have:
0 ≤ θ ≤ π/2 (since we are in the first octant)
0 ≤ r ≤ √(7/(2+4cos^2θ+4sin^2θ)) (using the equation of the paraboloid z=1+2x^2+2y^2 and the plane z=7)
Now, we can set up the integral in polar coordinates:
V = ∫∫∫ dzdydx
Since the volume element in polar coordinates is r dr dθ dz, we have:
V = ∫(∫(∫ dz)dr)dθ
V = ∫(∫(7 - (1+2r^2sin^2θ+2r^2cos^2θ))rdr)dθ
V = ∫(∫(6r - 2r^3)dr)dθ
V = ∫(3r^2 - r^4) dθ from 0 to π/2
V = ∫(3(7/(2+4cos^2θ+4sin^2θ))^2 - (7/(2+4cos^2θ+4sin^2θ))^4) dθ from 0 to π/2
8/3π.
Hence, The volume of the given solid is 8/3π.
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water from a vertical pipe emerges as a 20-cm -diameter cylinder and falls straight down 7.5 m into a bucket. the water exits the pipe with a speed of 2.2 m/s .
To fall 7.5 m into the bucket, the water takes approximately 1.22 seconds of time.
Diameter: The diameter of the water cylinder is 20 cm (0.2 m). This information is needed to determine the area of the water flow.
Vertical pipe: The water exits from a vertical pipe and falls straight down, which indicates that it falls due to gravity.
Speed: The water exits the pipe with a speed of 2.2 m/s. We will use this information to calculate the time it takes for the water to fall 7.5 m.
Distance: The water falls 7.5 m straight down into the bucket. We can use the distance and speed to determine the time it takes for the water to fall.
Calculate the area of the water flow:
Area = (pi * diameter²) / 4
Area = (3.1416 * 0.2²) / 4
Area ≈ 0.0314 m²
Calculate the time it takes for the water to fall 7.5 m:
We'll use the formula: distance = initial velocity * time + 0.5 * acceleration * time²
Rearrange the formula to find the time:
time = sqrt((2 * distance) / acceleration)
Since the water falls due to gravity, acceleration = 9.8 m/s²
time = sqrt((2 * 7.5) / 9.8)
time ≈ 1.22 s
So, the water takes approximately 1.22 seconds to fall 7.5 m into the bucket.
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In cylinders, what will cause wall tension to increase?
Wall tension in cylinders will increase due to higher internal pressure, thinner walls, and larger diameter.
The pressure exerted on the walls of the cylinder causes the molecules of the material to move closer together, resulting in an increase in tension or stress on the walls. This increase in tension can cause the cylinder to deform or even rupture if the pressure becomes too great. It's important to note that the thickness and material of the cylinder wall also play a significant role in determining the amount of tension it can withstand.
In addition, other factors such as temperature, friction, and external forces can also contribute to an increase in wall tension. Overall, understanding the factors that affect wall tension in cylinders is essential for ensuring their safe and effective use in various applications.
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suppose we have the instruction load 100. the register r1 contains 0x300 and the memory values as below: address field data 0x100 0x200 0x200 0x300 0x300 0x400 0x400 0x500 0x500 0x600 and using r1 for the addressing modes that involve a related register, give the actual values (e.g. 0x123) that will be loaded into the accumulator for the following addressing modes (give answer in the same order as below modes) executing the load instruction for each mode given below: a) indirect b) register indirect c) register d) indexed
The actual value loaded into the accumulator is 0x500.
a) Indirect addressing mode: In this mode, the memory location pointed to by the address in the register r1 is used to get the address of the operand. Therefore, the value of the memory location 0x300 is first fetched, which contains the address 0x400. Then, the value at address 0x400 is fetched, which is 0x500. This value will be loaded into the accumulator. Therefore, the actual value loaded into the accumulator is 0x500.
b) Register indirect addressing mode: In this mode, the contents of the register r1 are used as the address of the operand. Therefore, the value of the memory location 0x300, which is 0x400, will be used as the address of the operand. The value at address 0x400 is 0x500, which will be loaded into the accumulator. Therefore, the actual value loaded into the accumulator is 0x500.
c) Register addressing mode: In this mode, the register r1 itself is used as the address of the operand. Therefore, the value in the register r1, which is 0x300, will be used as the address of the operand. The value at address 0x300 is 0x400, which will be loaded into the accumulator. Therefore, the actual value loaded into the accumulator is 0x400.
d) Indexed addressing mode: In this mode, the value in the register r1 is added to the address field to get the address of the operand. Therefore, the address of the operand will be 0x100 + 0x300 = 0x400. The value at address 0x400 is 0x500, which will be loaded into the accumulator.
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How does friction help light a match?
Answer: causes the match to heat up
Explanation: If the match is struck against the striking surface, the friction causes the match to heat up. A small amount of the red phosphorus on the friction surface is converted into white phosphorus. The heat ignites the phosphorus that has reached the match head of the match when rubbing.
A ball is shot from a compressed air gun at twice its terminal speed.a)What is the ball's initial acceleration, as a multiple of g, if it is shot straight up?b) What is the ball's initial acceleration, as a multiple of g, if it is shot straight down?
Based on the given information, we can assume that the ball is shot from the compressed air gun with a velocity that is twice its terminal speed.
a) If the ball is shot straight up, we can use the equation for motion under constant acceleration:
v² = u²+ 2as
Where v is the final velocity (0 m/s since the ball will stop at its maximum height), u is the initial velocity (twice the terminal speed), a is the acceleration, and s is the displacement (maximum height reached by the ball).
We know that the initial velocity is twice the terminal speed, so:
u = 2v_t
Where v_t is the terminal speed.
Substituting this value into the equation, we get:
0 = (2v_t)² + 2as
Simplifying:
0 = 4v_t² + 2as
Rearranging:
a = -(2v_t²) / s
We know that the terminal speed is the maximum speed that the ball can reach in free fall, so we can use the equation for terminal speed:
v_t² = 2gh
Where g is the acceleration due to gravity (9.81 m/s^2), and h is the maximum height reached by the ball.
Substituting this value into the equation for acceleration, we get:
a = -(2(2gh)) / s
Simplifying:
a = -4gh / s
Therefore, the initial acceleration of the ball, as a multiple of g, if it is shot straight up is:
a = -4h / s
b) If the ball is shot straight down, the initial acceleration will be the same as the acceleration due to gravity, since the ball is being accelerated downwards by gravity. Therefore, the initial acceleration of the ball, as a multiple of g, if it is shot straight down is:
a = 1g
Note that this assumes that air resistance is negligible. In reality, air resistance would slow down the ball and affect its acceleration.
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What is nodal with voltage source?
A nodal voltage source is a type of voltage source that is connected directly between two nodes in a circuit, rather than being connected in series with a circuit element.
Nodal analysis is a circuit analysis technique that uses Kirchhoff's Current Law (KCL) to determine the voltage at each node in a circuit. When a voltage source is connected between two nodes, it can be included in nodal analysis as a source term in the equation for the corresponding node.
The voltage value of the source is simply included as a known value in the equation. This technique can be used to analyze complex circuits with multiple voltage sources and circuit elements.
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. A force P pulls on a crate of mass m that is in contact with a rough surface. The figure shows the magnitudes and directions of the forces that act on the crate in this situation. What is the magnitude of the normal force on the crate? A) 57 N B) 80 N C) 160 N D) 196 N E) 230 N AFN 160N 60° 80 N W=196 N
Approximately 57 N is the magnitude of the normal force on the crate. Answer is option A.
Identify the forces acting on the crate. There are three forces acting on the crate:
- Force P pulling the crate at a 60° angle (AFN: 160 N)
- Weight of the crate (W = 196 N)
- Normal force (N) exerted by the surface
Resolve the force P into its horizontal and vertical components:
- P_horizontal = 160 N * cos(60°) = 80 N
- P_vertical = 160 N * sin(60°) = 160 N * (√3 / 2) ≈ 138.56 N
Apply Newton's second law in the vertical direction (assuming upward as positive direction):
- Sum of vertical forces = 0 (as the crate is not moving vertically)
- N - W + P_vertical = 0
Solve for the normal force (N):
- N = W - P_vertical = 196 N - 138.56 N ≈ 57.44 N
So, the magnitude of the normal force on the crate is approximately 57 N, which corresponds to option A.
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please help fast if you can
Deforestation, pollution and burning of fossil fuels contribute to climate change. We need to reduce our ecological footprint and work towards a sustainable future for the planet. The Earth's atmosphere and oceans work together to create the weather and climate we experience. These processes are strongly influenced by human activity.
What is the interplay between the atmosphere, ocean and humans?The Earth's atmosphere and oceans work together to create the weather and climate we experience. Our actions as humans can profoundly influence these processes and ultimately determine the future of our planet. This process is responsible for everything from clear skies to strong storms and even changes in global temperature.
The Earth's atmosphere is a thin layer of gas that surrounds the Earth and extends to a height of around 10,000 km above the Earth's surface. The atmosphere plays an important role in regulating the Earth's temperature, protecting us from the sun's harmful rays and providing the oxygen we need to breathe.
Oceans cover approximately 70% of the Earth's surface and are responsible for maintaining the planet's thermal and energy balance. They help regulate the Earth's temperature by absorbing and releasing heat and play an important role in the water cycle, which produces rain, snow and other forms of precipitation.
Tropical storms are among the most extreme weather events on Earth. They form when warm, moist air rises and cools, causing thunderstorms. It can be a strong cyclone with strong winds and heavy rain, like a hurricane or typhoon. Climate is the long-term pattern of weather in a particular area over time. It is affected by factors such as the amount of solar radiation falling on the Earth's surface, the Earth's tilt and orbit, and the composition of the atmosphere. Human activities, such as burning fossil fuels, have increased the concentration of greenhouse gases in the atmosphere, trapping more heat and raising global temperatures.
As humans, our impact on Earth's atmosphere and oceans is significant. Deforestation, pollution and burning of fossil fuels contribute to climate change. By taking steps to reduce our carbon footprint, including using renewable energy sources and reducing waste, we can contribute to a sustainable future for our planet. Basically, the Earth's atmosphere and oceans are closely related and work together to create the weather and climate we experience. As humans, we have a significant impact on these processes and it is important to reduce our impact on the environment and work towards a sustainable future for our planet.
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an auto repair shop sign weighing 215 n is supported by a uniform 135-n beam with distances as shown. find the tension in the guy wire and the horizontal and vertical forces exerted by the pin on the beam.
To solve this problem, we need to use the principle of moments, which states that the sum of the moments of all the forces acting on an object must be equal to zero if the object is in equilibrium.
First, let's calculate the moment of the weight of the sign about the pin on the beam:
M = Fd
M = 215 N x 3 m
M = 645 Nm
Where F is the weight of the sign and d is the distance from the pin to the center of gravity of the sign.
Next, let's calculate the moment of the tension in the guy wire about the pin on the beam:
M = Fd
M = T x 4 m
M = 4T Nm
Where T is the tension in the guy wire and d is the distance from the pin to the point where the guy wire attaches to the beam.
Since the beam is uniform and in equilibrium, the sum of the moments about the pin must be equal to zero:
M(sign) + M(guy wire) = 0
215 N x 3 m + 4T Nm = 0
T = (215 N x 3 m) / (4 m)
T = 161.25 N
Therefore, the tension in the guy wire is 161.25 N.
Now, let's calculate the horizontal and vertical forces exerted by the pin on the beam:
Vertical force = weight of sign + tension in guy wire
Vertical force = 215 N + 161.25 N
Vertical force = 376.25 N
Horizontal force = 0 (since the beam is in equilibrium and there is no horizontal acceleration)
Therefore, the horizontal force exerted by the pin on the beam is 0 N and the vertical force exerted by the pin on the beam is 376.25 N.
To find the tension in the guy wire and the horizontal and vertical forces exerted by the pin on the beam, we'll need to use the principles of equilibrium for the uniform 135-N beam supporting the 215-N auto repair shop sign.
For equilibrium, the sum of forces in the vertical direction and the sum of forces in the horizontal direction should be equal to zero. Additionally, the sum of the torques (moments) about any point on the beam should also be equal to zero.
First, let's determine the tension (T) in the guy wire:
ΣFy = 0 => Tsin(θ) - 215 N - 135 N = 0
Tsin(θ) = 215 N + 135 N
T = (350 N)/sin(θ)
Next, we'll find the horizontal force (H) exerted by the pin on the beam:
ΣFx = 0 => H - Tcos(θ) = 0
H = Tcos(θ) = [(350 N)/sin(θ)]*cos(θ)
Finally, we'll find the vertical force (V) exerted by the pin on the beam:
ΣFy = 0 => V + Tsin(θ) - 215 N - 135 N = 0
V = 215 N + 135 N - Tsin(θ)
Without specific values for the distances and the angle (θ), we cannot compute the numerical values for T, H, and V. However, you can use these equations to calculate them once you have that information.
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The tension in the guy wire is approximately 149.6 N. The horizontal force exerted by the pin on the beam is 80.4 N, and the vertical force exerted by the pin on the beam is 169.6 N.
Determine the tension?To solve this problem, we can start by considering the equilibrium of forces acting on the beam. The weight of the sign, 215 N, can be considered as a downward force acting at a distance of 1.5 m from the left end of the beam.
We can assume that the beam is in equilibrium, meaning the sum of all horizontal forces and vertical forces acting on it is zero.
Let's denote the tension in the guy wire as T. The horizontal and vertical forces exerted by the pin on the beam can be denoted as H and V, respectively. Since the beam is uniform, we can assume that the center of mass of the beam is at its midpoint.
Using the equilibrium conditions, we can set up the following equations:
Horizontal forces: H - T = 0
Vertical forces: V - 215 N = 0
Taking moments about the left end of the beam, we can set up the equation:
V × 3 m - T × 4.5 m = 0
Solving these equations simultaneously, we find that T ≈ 149.6 N, H ≈ 80.4 N, and V ≈ 169.6 N.
Therefore, the tension in the guy wire is around 149.6 N, while the horizontal force exerted by the pin on the beam is about 80.4 N, and the vertical force is approximately 169.6 N.
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a 1000 kg car traveling at 30 m/s
Answer:
1000 x 30 squared x 1/2 = 450000
Explanation:
1000 x 30 squared x 1/2 = 450000
A mechanical bar screen is to be used in a rectangular channel with a maximum approach velocity of 2.1 ft/s. the bars are 0.5 inch thick and have 1.5 inch clear spacing between the bars. determine (a) the velocity between the bars and (b) the head loss in inches across the clean bar screen
Therefore, the velocity between the bars is 3.13 ft/s. Therefore, the head loss across the clean bar screen is 0.89 inches.
(a) The velocity between the bars can be calculated using the following formula:
Vb = Va / (1 - (Nb / Na))
where Vb is the velocity between the bars, Va is the approach velocity, Nb is the number of bars per foot, and Na is the net area of the bars.
Nb can be calculated as:
Nb = 12 / (s + t)
where s is the clear spacing between the bars and t is the thickness of the bars. Substituting s = 1.5 in and t = 0.5 in, we get:
Nb = 12 / (1.5 + 0.5)
= 8 bars/ft
Na can be calculated as:
Na = 1 - (Nb x t / s)
Substituting Nb = 8 bars/ft, s = 1.5 in, and t = 0.5 in, we get:
Na = 1 - (8 x 0.5 / 1.5)
= 0.33
Substituting Va = 2.1 ft/s and Na = 0.33, we get:
Vb = 2.1 / (1 - 0.33)
= 3.13 ft/s
(b) The head loss across the clean bar screen can be calculated using the following formula:
hL = Kb x (Vb² / 2g)
where hL is the head loss, Kb is a coefficient that depends on the shape and arrangement of the bars, Vb is the velocity between the bars, and g is the acceleration due to gravity.
For a rectangular channel with a bar screen having 1.5 in clear spacing and 0.5 in thickness, the value of Kb is approximately 0.6. Substituting Kb = 0.6, Vb = 3.13 ft/s, and g = 32.2 ft/s², we get:
hL = 0.6 x (3.13² / 2 x 32.2) = 0.89 in
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suppose you pass light from a he-ne laser through two slits separated by 0.0100 mm and find that the third bright line/fringe on a screen is formed at an angle of 10.95 relative to the incident beam. what is the wavelength of the light?
The wavelength of the light is approximately 6.52 × 10^-7 m.
To find the wavelength of the light, we can use the formula for the spacing of fringes in a double-slit experiment:
d sinθ = mλ
Where d is the distance between the two slits, θ is the angle of the bright fringe relative to the incident beam, m is the order of the fringe (the third bright line in this case), and λ is the wavelength of the light.
Plugging in the given values, we get:
0.0100 mm * sin(10.95°) = 3λ
Solving for λ, we get:
λ = (0.0100 mm * sin(10.95°)) / 3
λ ≈ 6.52 × 10^-7 m
Therefore, the wavelength of the light is approximately 6.52 × 10^-7 m.
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The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 25.0-kg object at 5.80 m/s2 on the Moon?A. 4.31 NB. 24.2 NC. 8.7 ND. 145 NE. 25.9 N
The net force required to accelerate a 25.0-kg object at 5.80 m/s² on the Moon is 24.2 N.
The formula for calculating net force is F = ma, where F is the net force, m is the mass of the object, and a is the acceleration. Given that the acceleration due to gravity on the Moon's surface is one-sixth that on Earth, the acceleration on the Moon is 5.80 m/s2 divided by 6, which is approximately 0.97 m/s2.
Using the formula F = ma, we can calculate the net force required to accelerate a 25.0-kg object at 5.80 m/s2 on the Moon:
F = ma
F = 25.0 kg x 0.97 m/s2
F = 24.25 N
Therefore, the answer is B. 24.2 N.
To find the net force required to accelerate a 25.0-kg object at 5.80 m/s² on the Moon, you need to use the following terms: acceleration due to gravity, mass, and Newton's second law of motion (F = m × a).
The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. Earth's gravitational acceleration is approximately 9.81 m/s². To find the Moon's gravitational acceleration, divide Earth's acceleration by 6:
Moon's gravitational acceleration = 9.81 m/s² / 6 ≈ 1.635 m/s²
Now, use Newton's second law of motion (F = m × a) to find the net force required to accelerate the 25.0-kg object at 5.80 m/s²:
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A typical human body has surface area 1.4 m2 and skin temperature 33 ?C. PART A: If the body's emissivity is about 0.90, what's the net radiation from the body when the ambient temperature is 11?C? Express your answer with the appropriate units.
If the body's emissivity is about 0.90, 122.96 W is the net radiation from the body when the ambient temperature is 11°C.
To calculate the net radiation from the body, we will use the Stefan-Boltzmann Law, which states:
P = ε * σ * A * [tex](T1^4 - T2^4)[/tex]
where P is the net radiation, ε is the emissivity, σ is the Stefan-Boltzmann constant (5.67 x[tex]10^{-8} W/m^2K^4[/tex]), A is the surface area, T1 is the skin temperature in Kelvin, and T2 is the ambient temperature in Kelvin.
First, convert the temperatures from Celsius to Kelvin:
T1 = 33°C + 273.15 = 306.15 K
T2 = 11°C + 273.15 = 284.15 K
Now, plug the given values into the equation:
P = 0.90 * (5.67 x [tex]10^{-8} W/m^2K^4[/tex]) * 1.4 m² * [tex](306.15^4 K^4 - 284.15^4 K^4)[/tex]Calculate the result:
P ≈ 122.96 W
The net radiation from the body when the ambient temperature is 11°C is approximately 122.96 W.
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Harlow Shapley found that globular clusters were roughly distributed throughout a spherical volume of space, and realized that
Harlow Shapley's discovery related to globular clusters and their distribution in space. Harlow Shapley found that globular clusters were roughly distributed throughout a spherical volume of space, and realized that this distribution could be used to determine the location of the Milky Way's center. By observing the positions and distances of these clusters, Shapley was able to estimate the position of our galaxy's center, which he determined to be located at a considerable distance from our Solar System. This finding helped to reshape our understanding of the Milky Way and our place within it.
Distribution of globular clusters in space: Shapley studied the distribution of globular clusters in space, which are collections of hundreds of thousands of stars that orbit the center of the Milky Way. By mapping the distribution of these clusters, Shapley was able to determine that the center of the Milky Way was not located where previously thought.
Mapping the Milky Way's spiral arms: Shapley was able to map the Milky Way's spiral arms using the distribution of young, bright stars. This helped him to determine that the Milky Way was much larger than previously thought.
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reason why friction is detrimental in a car engine?
Friction between moving engine parts raises their temperatures and wears them down.
What is Friction?Friction is the force that prevents solid surfaces, fluid layers, and material elements from sliding against each other. There are various kinds of friction: Dry friction is the force that opposes the relative lateral motion of two in touch solid surfaces.
Different Types of Friction
Static Friction.Sliding Friction.Friction during rolling.Friction caused by fluid.
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A car traveling at 35 ms to the north has a weight of 3500 what is the momentum of the car
Answer:
12250 kgms-1
Explanation:
momentum=mass ×velocity ,mass= w÷g so 3500 ÷ 10=350
=350kg×35 ms-1
=12250 kgms-1
an electron is moving to the right in a magnetic field pointing toward the top of this page. what direction is the resulting force?
Answer:
The out of page
A soccer player who has the ball is being chased by 4 other players from the opposing team. the player with the ball is running east at 20 m/s. select the opposing player who has the same velocity as the player with the ball.
a. number 17 who is running at 17 m/s in the westward direction.
b. number 03 who is running at 20 m/s in the eastward direction.
c. number 13 who is running at 12 m/s in the eastward direction.
d. number 28 who is running at 20 m/s in the northward direction.
Option B, number 03 who is running at 20 m/s in the eastern direction. Among the given options, number 03 has the same velocity as the soccer player with the ball.
Since the player with the ball is running east at 20 m/s, the opposing player who has the same velocity must also be running at 20 m/s in the eastward direction.
Option B is the only choice that meets these criteria.
The opposing player who has the same velocity as the player with the ball is number 03 who is running at 20 m/s in the eastward direction.
Hence, Among the given options, number 03 has the same velocity as the soccer player with the ball.
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according to maxwell’s equation, the speed of light in a vacuum is
According to Maxwell's equations, the speed of light in a vacuum is approximately 299,792,458 m/s.
Maxwell's equations are a set of four equations that describe the behavior of electric and magnetic fields. One of the equations, known as the Ampere-Maxwell equation, relates the speed of light in a vacuum to the electric and magnetic fields. According to Maxwell's equations, the speed of light in a vacuum is determined by the relationship between the electric constant (ε₀) and the magnetic constant (μ₀). The equation is: c = 1 / √(ε₀μ₀)
Where c represents the speed of light in a vacuum. When you plug in the values for ε₀ and μ₀, you find that the speed of light in a vacuum is approximately:
c ≈ 299,792,458 meters per second (m/s)
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on a cold day you inhale of air at , and its temperature is raised to . assume that the pressure of the air remains a constant during this process. what is the total change (in joules) in thermal energy of the air you inhaled?
The total change in thermal energy of the air you inhaled is approximately 158872.5 joules.
To calculate the total change in thermal energy of the air you inhaled, we can use the specific heat capacity equation:
Q = m * c * deltaT
where Q is the total change in thermal energy, m is the mass of the air, c is the specific heat capacity of air, and deltaT is the change in temperature.
We can assume that the pressure of the air remains constant, so we can use the equation for constant pressure processes:
Q = m * Cp * deltaT
where Cp is the specific heat capacity at constant pressure.
The mass of air inhaled is not given, but we can assume it is approximately equal to the volume of air inhaled, which is typically around 0.5 liters or 0.5 kg.
The specific heat capacity of air at constant pressure, Cp, is approximately 1005 J/kg*K.
The change in temperature, deltaT, is (32 - (-10)) = 42 degrees Celsius, which is equivalent to 42 + 273.15 = 315.15 Kelvin.
Plugging in the values, we get:
Q = 0.5 kg * 1005 J/kg*K * 315.15 K = 158872.5 J
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The voltage drop across a resistor is 6.0 v when a current of 3.0 a flows across the resistor. the current that will produce a voltage drop of 5.0 v across the resistor is: _________
the current that will produce a voltage drop of 5.0 V across the resistor is 2.5 A.
We can use Ohm's law to solve this problem. Ohm's law states that the voltage drop (V) across a resistor is equal to the product of the current (I) flowing through the resistor and the resistance (R) of the resistor, i.e., V = IR.
We are given that the voltage drop across the resistor is 6.0 V when the current is 3.0 A. Using Ohm's law, we can find the resistance of the resistor as:
R = V/I = 6.0 V / 3.0 A = 2.0 ohms
Now, we need to find the current that will produce a voltage drop of 5.0 V across the same resistor. Again, using Ohm's law, we have:
I = V/R = 5.0 V / 2.0 ohms = 2.5 A
Therefore, the current that will produce a voltage drop of 5.0 V across the resistor is 2.5 A.
Additionally, it's worth mentioning that voltage drops across resistors can be used to control the flow of current in a circuit. By adjusting the resistance value of a resistor, we can change the amount of voltage that is dropped across it, which in turn affects the current flowing through it.
This principle is widely used in electronic circuits for applications such as regulating the brightness of LEDs or controlling the speed of motors.
Finally, it's worth noting that in real-world circuits, the resistance of a resistor can vary slightly due to factors such as temperature, manufacturing tolerances, and aging. Therefore, it's important to choose resistors with appropriate tolerances and to take these factors into account when designing circuits.
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a 3{,}500\, \text{kg}3,500kg3, comma, 500, start text, k, g, end text probe lands on a planet where the gravitational field is twice that of earth. what is the gravitational force exerted on the probe while it is on the surface of the planet?
A 3,500 kg probe lands on a planet where the gravitational field is twice that of Earth.
The gravitational force exerted on the probe while it is on the surface of the planet can be calculated using the formula: F = m * g', where F is the gravitational force, m is the mass of the probe (3,500 kg), and g' is the gravitational acceleration on the planet. Since the planet's gravitational field is twice that of Earth, g' = 2 * g (where g is Earth's gravitational acceleration, approximately 9.81 m/s²).
So, g' = 2 * 9.81 m/s² = 19.62 m/s².
Now, we can calculate the gravitational force: F = 3,500 kg * 19.62 m/s² ≈ 68,670 N (Newtons).
The gravitational force exerted on the probe while it is on the surface of the planet is approximately 68,670 N.
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A ping-pong ball collides elastically a bowling ball, which is initially at rest. After the collision the ping-pong ball's kinetic energy is Ekinp What is the final kinetic energy of the bowling ball?
The final kinetic energy of the bowling ball is also Ekinp, as the collision is elastic and energy is conserved.
In an elastic collision, kinetic energy is conserved, which means that the total kinetic energy before the collision is equal to the total kinetic energy after the collision. In this case, the bowling ball is initially at rest, so its initial kinetic energy is zero. Therefore, the total initial kinetic energy is equal to the kinetic energy of the ping-pong ball, which is Ekinp.
After the collision, the ping-pong ball transfers some of its kinetic energy to the bowling ball, which starts to move. However, since the collision is elastic, the total kinetic energy remains the same. This means that the final kinetic energy of the system (ping-pong ball + bowling ball) is also Ekinp.
To summarize, the final kinetic energy of the bowling ball is equal to the initial kinetic energy of the ping-pong ball, which is Ekinp, since the collision is elastic and energy is conserved.
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Pick the false statement.A) Our assumed temperature shape can satisfy the weak form with the assumed piecewise linear variation of w(x) but not the strong form (i.e. the original differential equation).B) The order of the temperature derivative in the weak form is the same as in the strong form.C) Derivation of the weak form involves integration by parts.D) The weak form needs to be satisfied for any value of the weighting function w(x) at the nodes.
The false statement is A) Our assumed temperature shape can satisfy the weak form with the assumed piecewise linear variation of w(x) but not the strong form (i.e. the original differential equation).
The original differential equation is multiplied by a weight function and integrated over the domain of interest in the finite element method to convert it into a weak form.
While the strong form necessitates that the function be differentiable, the weak form just demands that the function be integrable. The assumed temperature shape may therefore satisfy the weak form but not the strong form.
This is due to the strong form requiring the function to be differentiable, but the weak form merely requires the function to be integrable.
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Describe the history of the development of the current atomic model. Be sure to include at least three different historic models.
A model used to explain the composition and structure of an atom is known as a "atomic model" in physics.
Thus, Over time, atomic models have undergone numerous modifications in order to better fit experimental evidence.
The Greek atomic theory was not founded on natural observations, measurements, tests, or experiments, despite its historical and philosophical significance.
Atomic model proposed by Dalton was well received. It was consistent with experimental findings and combined the previously understood concepts of the law of conservation of mass, the law of definite proportions, and the law of numerous proportions.
Thus, A model used to explain the composition and structure of an atom is known as a "atomic model" in physics.
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a fine metal foil separates one end of two pieces of optically flat glass, as in (figure 1). when light of wavelength 710 nm is incident normally, 24 dark lines are observed (with one at each end).
Based on the information provided, it seems that the setup described is an example of a Fabry-Perot interferometer. The fine metal foil serves as a partially reflective surface that reflects some of the incident light back towards the glass plates, where it can interfere with the incident light that passes through the foil.
The result of this interference is the observation of dark lines in the transmitted light, with one at each end of the glass plates. The number of dark lines observed is related to the wavelength of the incident light and the distance between the plates, according to the equation:
N = 2d/λ
where N is the number of dark lines observed, d is the distance between the plates, and λ is the wavelength of the incident light.
In this case, with a wavelength of 710 nm and 24 dark lines observed, we can solve for the distance between the plates:
d = Nλ/2 = 24(710 nm)/2 = 8520 nm
So the distance between the plates is approximately 8.52 micrometers.
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how far must a 2.0-cm-diameter piston be pushed down into one cylinder of a hydraulic lift to raise an 7-cm-diameter piston by 35 cm?
Answer:
The distance the 2.0-cm-diameter piston must be pushed down to raise 9 cm diameter is 607.5 cm.
Explanation:
Distance the piston must be pushed down.