The electron in tungsten's energy is 66 eV and wavelength is 1.89 x 10⁻¹¹m.
What is energy and wavelength of electron?The wavelength of any wave is the distance between one crest and the next. The wavelength is commonly represented by the symbol.The amount of energy is proportional to the electromagnetic frequency of the photon and thus inversely proportional to the wavelength. The higher the frequency of a photon, the greater its energy. The longer the wavelength of a photon, the lower its energy.The mean energy of the energy spectrum is a critical parameter for therapeutic electron beam dosimetry. It is frequently assumed that the mean energy of such beams remains constant across the beam and that only its degradation with depth is taken into account.To learn more about wavelength refer to :
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Kamal's family is leaving for merry mountain resort once his parents get home from work on friday. Their house is 627 miles from the resort. They plan to stop and spend the night at a hotel after 4 hours of driving, then complete the rest of the trip on the second day. Their average speed is 60 miles per hour. Which equation can you use to find how long, x, they will drive on the second day?.
The time taken by Kamal's family to drive on the second day is 6.45 hours.
What is speed?
Speed is defined as the ratio of the time it takes for a body to cross a distance to the time it takes.
The time is calculated as:-
For 4 hours of driving at an average speed of 60 miles per hour, the distance covered is,
d = 60 x 4 = 240miles
Miles remaining for the second day is,
627 - 240 = 387 miles
Time taken to cover 387 miles second day is,
T = 387 / 60 = 6.45 hours
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why does michael jordan appear to defy gravity as he slam dunks the ball? (after you have thought about this question, see page 68 of your textbook.)
Michael jordan appears to defy gravity because His motion is that of a projectile, and a projectile's motion is such that its vertical speed is minimal while at the high point of its trajectory.
What do you mean by projectile motion?
Projectile motion is a form of motion experienced by an object or particle that is projected in a gravitational field, such as from Earth's surface, and moves along a curved path under the action of gravity only. Examples of projectile motion include throwing a ball straight upward, kicking a ball and giving it a speed at an angle to the horizontal, or simply dropping an object and allowing it to free fall. In all cases, gravity is the only force acting on the object.To know more about Projectile motion here
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which property of an object will not be changed by moving it from one place on the earth to another?
By shifting an object from one location on the planet to another, its mass will remain unchanged.
What is an object in a sentence?To refer to the item or person that is the target of an action, we typically use the word "object." Alternatively, the recipient. In a sentence, a verb's action is transferred to a noun or pronoun as a direct object. It typically responds to the what- or whom-questions regarding the verb.
What is a picture or an object?Icons, cursors, buttons, sprites, and other complicated artworks can be made from a collection of simple visual pieces called image objects. Without having to sketch a single pixel, Image Objects let you express creativity.
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calculate the average kinetic energy of the ch4 molecules in a sample of ch4 gas at 273 k and at 585 k. 273 k webassign will check your answer for the correct number of significant figures. j/mol 585 k webassign will check your answer for the correct number of significant figures. j/mol
The average kinetic energy of the methane CH₄ molecule at 273K and 585K is 565 x 10⁻²¹ J and 1.21 x 10⁻²⁰ J. respectively.
The average kinetic energy of a gas molecule is given by the formula,
K = 3/2K'T
Where,
K is the average kinetic energy,
K' is the Boltzmann constant,
T is the temperature.
So, putting values, to find the average kinetic energy of CH₄ molecule, first for 272K
K = 3/2 x 1.38 x 10⁻²³ x 273
K = 565 x 10⁻²¹ J
Now, for 585 K,
K = 3/2 x 1.38 x 10⁻²³ x 585
K = 1.21 x 10⁻²⁰ J.
So, these are average kinetic energies of the CH₄ molecule at 273K and 585K.
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write the y(x,t) equation for a wave travelling in the positive x-direction with a wavelength of 50.0 cm, speed of 4.00 m/s, and amplitude of 5.00 cm. be sure to include units where appropriate.
The y(x,t) equation of wave travelling in the positive x-direction is y = 0.05 cos ( π (16t - 4x)).
Wavelength of the wave = λ = 50.0 cm = 0.5 m
Speed of the wave = s = 4 m/s
Amplitude of the wave = A = 5 cm = 0.05 m
The y(x,t) equation of the wave is =
= Using sine wave equation
= y = A cos (ωt - kx)
Here, (ωt - kx) means that the wave is travelling in positive x-direction.
Now, ω = 2πf
= 16π rad/s
Thus, Frequency of the wave = f =
= speed / wavelength
= s / λ
= 4 / 0.5
= 8 Hz
Now, value of k =
= k = 2π/λ
= k = 4π
Substituting these values in the sine wave equation,
= y = A cos (ωt - kx)
= y = 0.05 cos ( 16πt - 4πx)
= y = 0.05 cos ( π (16t - 4x))
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two blocks are stacked on top of each other on the floor of an elevator as shown. the mass of block 2 (bottom) is 3.0 kg and the mass of block 1 (upper) is 2.0 kg. the elevator is accelerating upwards at a constant rate of 1.6 m/s2.
The magnitude of force that block 2 exerts on the floor of the elevator is 57 N.
Mass of block 1 = m = 2Kg
Mass of block 2 = M = 3Kg
Acceleration of the elevator = 1.6 m/s
The magnitude of force exerted by block 2 = N =
= Using Newton's second law of motion
= N - w = (m + M) X a
= N - (m + M) X g = (m + M) X a
And we know that total force = m X a
= N = (m + M) X (g + a)
= N = (3+2) X (9.8 + 1.6)
= N = 5 X 11.4
= N = 57 N
Thus, the force exerted by block 2 on the elevator floor is 57 Newtons.
The complete question:
two blocks are stacked on top of each other on the floor of an elevator as shown. the mass of block 2 (bottom) is 3.0 kg and the mass of block 1 (upper) is 2.0 kg. the elevator is accelerating upwards at a constant rate of 1.6 m/s2. What is the force exerted by block 2 on the floor of the elevator?
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If the electron were replaced with a proton moving with the same velocity, how would the resulting acceleration of the particle change?.
As a result, the proton will accelerate in a manner opposite to that of the electron, both in terms of amplitude and direction.
what is A description of an accelerationAcceleration is the term for how quickly and in what direction a velocity varies over time. Acceleration is the change in direction or speed of a moving object that is moving ahead.
What is the acceleration unit?Meter per second per minute (m/s2) is the unit of acceleration. Definition. The force known as the snewton is that which, when applied to a mass of one kilogram, results in an acceleration from one metre per second per second.
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1.how high will the station have to above the normal train track be for 100,000 kg train going 100 km/hr to come to a stop?
The calculated answer is 1000 m. Since we must suppose that there isn't any external net force operating on the system of the two trains, this is an issue about momentum conservation.
When the trains clash, there will be a collision force between them, but since we have defined the system as the two trains, the force is internal to the system.
The starting momentum of train 1 plus train 2 equals the end momentum of train 1 plus train 2, or p1 + p2 = p1′ + p2′. However, train 2 has no momentum because we are aware that it is at rest. That enables us.
Since p = mv,
v1 = v2,
and m is a constant, the revised form of the equation is p1 + 0 = p1′ + p2′.
either mv1 = 2mv or mv1 = (m + m) v.
=100000/100
=1000 km
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4.127 a model solid propellant rocket has a mass of 69.6 g, of which 12.5 g is fuel. the rocket produces 5.75 n of thrust for a duration of 1.7 s. for these conditions, calculate the maximum speed and height attainable in the absence of air resistance. plot the rocket speed and the distance traveled as functions of time.
The maximum speed and height attainable in the absence of air resistance is 139.2 m/s and 1100m.
Umax = U(t = t’ = 1.7 sec) = 139.2 m/s (h(t = t’) = 114 m)
hmax = h(t = tm = 15.9 sec) = 1100 m
Assume that the rocket's mass flow rate is constant. Assume, too, that the thrust will remain constant throughout the burn.
Apply the rocket's frame of reference to the CV displayed and the linear momentum equation in the y-direction.
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I understand that the question you are looking for is:
A model solid propellant rocket has a mass of 69.6 gm, of which 12.5 gm is fuel. The rocket produces 1.3 lbf of thrust for a duration of 1.7 sec. For these conditions, calculate the maximum speed and height attainable in the absence of air resistance. Plot the rocket speed and the distance traveled as functions of time
a charged particle enters a region of uniform magnetic field. Determine the direction of the force on each charge due to the magnetic field Part B Figure 2 of 3 Determine the direction of the force on the charge due to the magnetic field. (Figure 2) View Available Hints) a. F points out of the page. b. F points into the page c. Fpoints neither into nor out of the page and F ≠ 0. d. F = 0
The direction of the force on each charge due to the magnetic field will be on the page.
Calculation:-
Force on a charged particle in a magnetic field is given as
F = q(V x B)
As its velocity is in +Y direction = J
The magnetic field in +x-direction = I
So,( Force will be in (I x J).
When a charged particle enters a region of uniform magnetic field and its velocity is perpendicular to the magnetic field, a magnetic force is generated that acts as a centripetal force, causing circular motion of the particle. Since the magnetic force acts perpendicular to the direction of motion, charged particles follow curved paths within the magnetic field.
The Particle continues following this curved path until it forms a perfect circle. Magnetic forces act on particles perpendicular to their velocity, so they do not act on them. The kinetic energy and velocity of the particles do not change. For example, due to their inertia, charged particles drift in inhomogeneous magnetic fields and generate ring currents around the Earth.
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why do we say that force is a vector quantity? it has magnitude only because forces can be unbalanced it has direction only it has magnitude and direction because forces can be balanced next
The fact that force has both a magnitude and a direction makes it a vector quantity.
Explanation
A force has a direction and a magnitude.
Force in Balance and Disproportion A force is a vector quantity since it has both magnitude and direction. The strength of a force can be expressed mathematically as its magnitude. The force's direction is the direction in which it pushes or pulls something. Two forces that are the same in size but acting in opposite directions are not equal. The newton (N), which bears Sir Isaac Newton's name, is the SI unit of force. Due to Earth's gravity, weight is also a form of force; as a result, the SI unit for weight is also a newton.
The fact that force has both a magnitude and a direction makes it a vector quantity.
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a sound has a frequency of 1000 hz. if a listener moves with a speed of 30 m/s away from the source, what is the frequency heard by the observer? (the sound speed is 340 m/s.)
The frequency heard by the observer is 923 Hz, which is lower than the frequency emitted by the source (1000 Hz).
What is frequency?
The term "disturbance" refers to a moving disturbance. These mechanical waves, which are numerous and must pass through a medium like air or water, must travel. In addition to a vacuum, other types of waves, such as electromagnetic waves, can pass through solid objects. The frequency and wavelength of a wave are two examples of the distinct characteristics that help describe its motion and energy. It is generally understood that frequency refers to the regularity of an event, or more specifically, the regularity of a wave. The wave count that pass through a point in a predetermined amount of time is how frequently waves occur. The amount of waves which pass a point inside one second is another way to define frequency.
The frequency heard by the observer is lower than 1000 Hz. This is due to the Doppler effect, which states that the frequency of a sound heard by an observer moving away from the source is lower than the frequency of the sound emitted by the source.
The change in frequency is given by the formula:
f' = f (v + v_s) / (v - v_o)
where f' is the frequency heard by the observer, f is the frequency emitted by the source, v is the speed of sound, v_s is the speed of the source, and v_o is the speed of the observer.
In this case, f' = 1000 Hz (340 + 0) / (340 - 30) = 923 Hz.
Therefore, the frequency heard by the observer is 923 Hz, which is lower than the frequency emitted by the source (1000 Hz).
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under normal conditions, when is the only time that an oil film does not keep engine parts separated?
An oil film does not keep engine parts separated when:
The oil level is too low.The oil is too dirty.The oil is too old.The Importance of a Good Oil Level in EnginesThe proper functioning of engines depends on many factors, but one of the most important is the level of oil. Oil lubricates and protects the internal parts of the engine, keeping them apart.
This helps prevent wear and friction between moving parts, ensuring optimum performance. If the oil level is too low, the engine parts will not be adequately lubricated and separated, which can result in serious problems.
Therefore, it is essential to maintain the oil level at an adequate level. To do this, it is recommended to check the oil level regularly.
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A resistor and an initially uncharged capacitor are connected in series with battery. A long time after the circuit is connected , which of the following is true? O The voltage across the resistor is at its maximum: O The voltage across the capacitor is at its minimum: O The charge on the capacitor is at its minimum. O The current in the circuit is at its maximum; O The current in the circuit is Zero.
The current in the circuit is Zero is true
Define current
An electrical charge carrier flow known as current often involves electrons or atoms lacking in electrons. negative to positive points are crossed by current.
The maximum voltage across the resistor is the first choice. This choice is incorrect because, after a considerable amount of time, the capacity is fully charged and the circuit's current "I" will be equal to zero. Moreover, because current is 0 It will now be equal to zero for the voltage courses resistive "IR."
The next option claims that the voltage across the capacitor is at its lowest. Additionally, this is incorrect because charge across a capacitor reaches its maximum over time. In addition to being maximum, voltage will be maximum and equivalent to charge upon capabilities.
No The capacitor is only partially charged, according to the next option. This is incorrect since it takes a while for the charge to reach its maximum level before the maximum current is claimed. . Which is also incorrect because once the capacitor is fully charged, current eventually zeroes out.
Since the capacitor's charge did not change at all after it reached full charge, the fact that the circuit's current is zero is accurate. Because the charge has achieved its maximum value, the rate of change of charge will be zero, and the current will also be zero.
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a capacitor operating at 300 volts must be discharged to what voltage within 1 minute after it is disconnected from its supply?
A capacitor operating at 300 volts must be discharged to a voltage of 50 volts or less within one minute after it is disconnected from its supply.
The capacitor undergoes charging and discharging cycles when connected to a circuit. When a capacitor is discharged during operation, some part of the charge remains in the capacitor. Therefore, the capacitor does not discharge itself completely during normal operation.
Even after disconnecting the circuit, some charge will be left over in the capacitor (unless it is manually discharged). This charge that remains in the capacitor is known as a residual charge.
Reduce a capacitor's residual voltage to 50 volts or less within 5 minutes after the capacitor is disconnected from the supply source.
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listed following are several stars found in the disk and halo of the milky way galaxy. assume that both the blue and yellow disk stars are members of the same open cluster. rank the stars based on the abundance of elements heavier than carbon that you would expect to find in each of the stars, from highest to lowest. if you expect two (or more) stars to have approximately the same abundance, rank them as equal by dragging one on top of the other(s).
a) hot, blue mains sequence star in open cluster in disk.
b) red main sequence star in globular cluster M13
c) yellow main sequence star in open cluster in disk.
d) red giant in globular cluster M13.
I just put (heaviest abundance - lowest abundance) at
c - a - (c and d)
Highest Abundance: Yellow main-sequence star in open cluster in disk AND hot, blue main-sequence star in disk.
Lowest Abundance: red giant in globular cluster M13 AND red main-sequence star in globular cluster M13.
What is abundance?
Astronomers refer to all chemical elements heavier than hydrogen or helium as metals, including elements such as carbon and oxygen that are not normally considered metals. The metallicity of a star is therefore given as the proportion of these "metallics" in the stellar mass. About 2% for the Sun.
However, this definition cannot fully define the chemical composition of stars. Because you can achieve the same amount of metal in an almost infinite number of ways. For example, a star with a particular metallicity may have all of its metals iron, and another star with the same total metals content may have all of its metals oxygen. In the world, the entire periodic table of elements is present in every star, but the relative abundance of each element varies from star to star.
To quantify the relative abundance of individual elements in a star, astronomers define the "abundance ratio" as the logarithm of the ratio of the star's two metallic elements to the ratio of the Sun.
Therefore,
Highest Abundance: Yellow main-sequence star in open cluster in disk AND hot, blue main-sequence star in disk.
Lowest Abundance: red giant in globular cluster M13 AND red main-sequence star in globular cluster M13.
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c. we may think of a bulb as presenting an obstacle, or resistance, to the current in the circuit. 1. thinking of the bulb in this way, would adding more bulbs in series cause the total obstacle to the flow, or total resistance, to increase, decrease, or stay the same as before. 2. formulate a rule for predicting how the current through the battery would change (i.e., whether it would increase, decrease, or remain the same) if the number of bulbs connected in series were increased or decreased.
All light bulbs contain a filament that has some form of resistance hence adding more bulbs in series will increase the total obstacle to the flow, or increases the total resistance
Resistance is the degree to which a substance obstructs or opposes an electric current and electron flow is referred to as electric current.
As electricity passes through the filament, it encounters the resistance due to presence of filament and the energy is converted into light and heat.
According to the Ohm's law, V = IR
if the voltage remains constant then the current(I) is inversely proportional to the resistance(R).
So increasing the number of bulbs connected in series would decrease the current through the battery as it is having constant voltage.
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what is the tension in the rope, and what is the magnitude of the force that the floor exerts on the plank?
The tension in the rope is 366 N, and the floor's strain on the plank is 221 N, based on the answer to the question.
What does tension look like?Compression force's opposite is tension. All of the things in the scene that are in contact with one another apply forces to one another. The finest demonstration of a tension force is when a rope is being pulled. The rope builds up a lot of tension when ever a pull force is applied to it.
Briefing:a). Taking into account the plank's torque at the floor:
(T sin 60 )(L ) = (20g cos 30)(L/2) + (50g cos 30)(3L/4)
T = ( 10g cos 30 + (150 g cos 30) / 4) / sin 60
= 466 N
b). R + T = (20 + 50 )g
R = 70g − T
= 686 − 466
= 221 N
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The complete question is-
A 20.0-kg uniform plank (10.0 m long) is supported by the floor at one end and by vertical rope at the other end shown in the figure A 50.0-kg mass person stands on the plank distance three-fourths of the length plank from the end on the floor.
(a) What is the tension in the rope?
(b) What is the magnitude of the force that the floor exerts on the plank?
Bobby and Michael are competing by running up bleachers. Both runners weigh the same. Bobby runs up the
bleachers in 30s and Micheal run up the same bleachers in 40s. Who is more powerful?
A Bobby and Michael are both equally powerful.
B Michael because he took longer to run up the stairs.
C Bobby because he runs up the stairs faster.
D Bobby because he does more work.
Bobby is more powerful because he runs up the stairs faster.
What is power?Power is known to be the speed at which work is done. P = gravimetric power The SI unit is Watt W, where 1 Watt equals 1 Joule/second (1W=1J/s). Since work is energy transfer, power is also the rate at which energy is consumed. For example, a 60 W light bulb consumes 60 J of energy per second.
W = F × s
Where, W = work done
F = Force
s = distance
Since both of them are of same weight and can exert equal force while running and are covering same distance, their work done will be equal.
Now according to, P = W/T
Where, P = Power
W = Work
T = Time
Hence, power is inversely proportional to time.
Lesser the time for a particular work higher will be the power.
Time taken by Bobby to reach the bleachers = 30s
Time taken by Michael to reach the bleachers = 40s
As Bobby took lesser time to reach the bleachers, implies his high rate of work.
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The average kinetic energy of gas molecules is ________ proportional to the absolute temperature.
The average kinetic energy of a gaseous molecules is directly proportional to the absolute temperature. This indicates that the motion of all the molecules stops if the temperature decreases to absolute zero.
What is average kinetic energy?The product of each gas molecule's half mass and its square RMS speed yields the average kinetic energy of a gas molecule. In mathematical terms,
[tex]K=\frac{1}{2}mv_{rms}^{2}[/tex]
Here, K = Average kinetic energy
m = Mass
vrms = RMS velocity.
What is absolute temperature?The Kelvin scale, where 0 represents absolute zero, is used to measure absolute temperature. The temperature at which matter's particles move the least and cannot cool down is known as the zero point (minimum energy).
How average kinetic energy is related to absolute temperature?[tex]K=\frac{1}{2}mv_{rms}^{2}\\[/tex]
Now, [tex]v_{rms} = \sqrt{\frac{3RT}{M} }[/tex]
Substituiting the value vrms we get,
[tex]K=\frac{1}{2}mv_{rms}^{2}\\\\K= \frac{3}{2} RT[/tex]
Thus from the above equation we can see that a gas particles average kinetic energy is directly proportional to the absolute temperature (T) of the gaseous particles. All the gases at the same temperature have the same average kinetic energy (K).
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what is the magnitude of the resulting force on the 8 kg mass at the origin? the value of the universal gravitational constant is 6.6726 × 10−11 n · m2 /kg2 . answer in units of n.
As per the details given, the magnitude of the resulting force on the 8 kg mass at the origin due to the gravitational attraction of the other two masses is 1.09 x 10⁻¹¹ N.
To calculate the magnitude of the resulting force on the 8 kg mass at the origin, we need to consider the gravitational forces exerted by the other two masses.
Let's assume the mass at the origin is M₁ = 8 kg, the mass at (0, 6) is M₂ = 16 kg, and the mass at (8, 0) is M3 = 4 kg.
The gravitational force (F) between two masses M₁ and M₂ is given by Newton's law of universal gravitation:
F = G * (M₁ * M₂) / r²
where G is the universal gravitational constant (6.6726 × 10⁻¹¹ N·m²/kg²), M₁ and M₂ are the masses, and r is the distance between the centers of the masses.
1. Gravitational force between M₁ and M₂:
Distance between M₁ and M₂:
r1 = √(0² + 6²) = 6 m
Gravitational force between M₁ and M₂:
F1 = G * (M1 * M2) / r₁²
F1 = 6.6726 × 10⁻¹¹ * (8 kg * 16 kg) / (6 m)²
F1 ≈ 1.0660 × 10⁻¹⁰ N
2. Gravitational force between M₁ and M₃:
Distance between M₁ and M₃:
r₂ = √(8² + 0²) = 8 m
Gravitational force between M₁ and M3:
F₂ = G * (M₁ * M₃) / r₂²
F₂ = 6.6726 × 10⁻¹¹ * (8 kg * 4 kg) / (8 m)²
F₂ ≈ 2.0015 × 10⁻¹¹ N
Now, the resulting force on M₁ is the vector sum of the forces F₁ and F₂. Since the forces are acting along the x-axis and y-axis, we can use the Pythagorean theorem to find the magnitude of the resulting force:
Magnitude of the resulting force on M1:
F' = √(F₁² + F₂²)
F' = √((1.0660 × 10⁻¹⁰ N)² + (2.0015 × 10⁻¹¹ N)²)
F' ≈ √(1.1363 × 10^(-20) N² + 4.0060 × 10⁻²² N²)
F' ≈ √(1.1769 × 10⁻²⁰ N²)
F' ≈ 1.09 × 10⁻¹¹ N
Thus, the resulting force on the 8 kg mass at the origin is approximately 1.09 × 10⁻¹¹ N.
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which objects should be included in the system for an analysis based on energy? select all that apply.
The energy can be described when we involve The spring and the block.
What is energy?We know that energy is the ability to do work. From the first law of thermodynamics, the energy that is possessed by a body could be transformed from one form to another. As such, energy can not be created nor destroyed in a system.
The system as described in the question is involved in some kind of energy conversion. In this case, a compressed spring launches a block up an incline. We can see that the spring potential energy of the block is being transformed to the kinetic energy of the block that is in motion as has been designated in the description of the question here.
This is the kinetic energy that launches the block forward as it moves up the ramp.
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Missing parts
A compressed spring launches a block up an incline.
Which objects should be included within the system in order to make an energy analysis as easy as possible?
Check all that apply.
Spring
Ramp
Air
Block
Earth
a car can just make it around a curve without slipping at 27 m/s when the coefficient of friction is 0.7. find the radius of the curve.
The radius of curvature of a car to turn without slipping is 106.27 m.
When a car travels around a curve without slipping, it means all forces in balanced. Two forces are working in the car
Centripetal forceAccording to Newton's first law
∑F = 0
Fc - f = 0
Fc = f
[tex]m \frac{v^2}{R} = \mu m g[/tex]
v² = μgR
27² = 0.7 × 9.8 × R
729 = 6.86 × R
R = 729 ÷ 6.86
R = 106.27 m
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humans can produce an output power as great as 20 w/kg during extreme exercise. sloths are not so energetic. at its maximum speed, a 4.0 kg sloth can climb a height of 6.0 m in 2.0 min.
Specific Power S.P=0.49 W/kg
The power when an amount of energy ΔE is transferred in a time interval Δt is given by:
P= Δt/ΔE.........(1)
The gravitational potential energy of an object of mass m at height y (assuming [tex]U_g = 0[/tex] at y = 0) is given by:
[tex]U_g[/tex] = mgy.........(2)
The specific power of a person (or animal, machine, or device) of mass m doing the transformation or the work is given by:
specific power= mass of agent causing the transformation of transfer /power of a transformation or a transfer
The mass of the sloth is m= 4 kg and it climbs a height of h = 6 m in Δt=20 min 120 s.
Let its initial height be the zero gravitational potential energy level y=0; So its final height is yf = h
So, from equation (2), the change in the sloth's gravitational potential energy is:
ΔE=Uf−Ui =mg(h−0)=mgh
Now, we plug our values for m and h, so we get:
ΔE=(4.0 kg)×(9.8 m/[tex]s^2[/tex])×(6.0 m)
=235 J
Then, we plug our values for ΔE and Δt into equation (1), so we get the output power of the sloth:
P= 120 s/235 J
=1.96 W
Finally, we plug our values for P and m into equation (3), so we get the specific power of the sloth for this climb:
S.P= 4.0 kg/1.96 W
=0.49 W/kg
∴ S.P=0.49 W/kg
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Suppose a paper rocket has a mass of .023 kg. The rocket travels at a velocity of 6.6 m/s and then hits the ground sliding to a stop. If the rocket travels 15 m in coming to a rest what is the work done by friction?
Answer:
.5 J
Explanation:
KInetic Energy of the rocket = 1/2 mv^2 = 1/2 .023 * 6.6 = .5 J
the work of friction has to equal this .5 J
a 1,000-mw (el) power plant working at 35% thermal efficiency 100% of the time (base load) uses coal with formula ch and a heating value of 30 mj/kg. how much co2 does this plant emit (metric tons/y)?
The amount of CO₂ emitted by the plant is 7773579.832 metric tonnes per year.
Power of the plant = Capacity of the plant = 1000 MW
Working efficiency = 35%
Time = 100%
Heating value of coal = 30 mj/Kg
One year KWh of the plant =
= 1000 X 1000 X 365 X 24
= 31536 X 10¹² metric tonnes per year
Amount of coal =
= (31536 X 10¹² ) / (30 X 10⁶ X 0.35)
= 3003428571 Kg
Thus, the amount of CO₂ emitted by the plant =
= (3003428571 X 44) / 17
= 7773579832 Kg/ year
= 7773579.832 metric tonnes per year
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Why does the rotation curve for the solar system show speeds that become slower with increasing distance from the sun?.
The rotation curve for the solar system show speeds that become slower with increasing distance from the sun Because the Sun contains most of the mass of the solar system
What is solar system ?The Solar System is composed of the Sun, eight planets, and another collection of celestial bodies. These celestial bodies and planets are drawn to and orbit the Sun. The Sun, an average star, the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune make up our solar system.
As the distance from the galactic centre increases, it is discovered that the rotation speed does not decrease, suggesting that the galaxy's mass distribution cannot be concentrated like the light distribution.
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A laser with wavelength d/8 is shining light on a double slit with slit separation 0.400mm . This results in an interference pattern on a screen a distance L away from the slits. We wish to shine a second laser, with a different wavelength, through the same slits.
Part A: What is the wavelength ?2 of the second laser that would place its second maximum at the same location as the fourth minimum of the first laser, if d = 0.400mm ? Express your answer in millimeters.
The wavelength of the second laser is 0.170mm.
What is wavelength?
The distance over which a periodic wave's shape repeats is known as the wavelength in physics. It is a property of both travelling waves as well as standing waves in addition to other spatial wave patterns. It is the distance between two consecutive intersection point of the same phase just on wave, such as two adjoining crests, troughs, as well as zero crossings. The spatial frequency is the reciprocal of wavelength. The Greek letter lambda () is frequently used to represent wavelength. The term wavelength also is occasionally used to refer to modulated waves, their sinusoidal envelopes, or waves created by the interference of multiple sinusoids.
The distance between the successive maxima and minima of the interference pattern is given by the equation
d/λ = L sin θ
where θ is the angle between the slits and the screen. Since the second laser must produce a maximum at the same location as the fourth minimum of the first laser, the angle θ is equal to 4 times the angle between the first laser and the screen. Thus, the wavelength of the second laser is given by the equation
λ2 = (d/L) sin(4θ)
Substituting in the given values, we have
λ2 = (0.400mm/L) sin(4θ)
where θ is the angle between the first laser and the screen. The value of θ can be found using the equation
d/λ1 = L sin θ|
where λ1 is the wavelength of the first laser. Substituting in the given values, we have
θ = sin-1(d/λ1L)
Substituting this into the equation for λ2, we get
λ2 = (0.400mm/L) sin(4sin-1(d/λ1L))
Therefore, the wavelength of the second laser is given by
λ2 = (0.400mm/L) sin(4sin-1(d/0.400mm/8))
= 0.400mm sin(4sin-1(1/8))
= 0.400mm x 0.425
= 0.170mm
Therefore, the wavelength of the second laser is 0.170mm.
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While marching, a drum major tosses a baton into the air and catches it. The height h (in feet) of the baton after t seconds can be modeled by h =—16t2+32t+6. How long is the baton in the air?
A drum major tosses a baton into the air and catches it and how long is the baton in the air is 22 feet
The heightis h of a baton function of time is t
h=−16t²+32t+6
dh/dt=d/dt(−16t²+32t+6)
=−32t+32
d²h/dt²=−32<0
For maximum height h, we have
dh/dt=0
−32t+32=0
t=1
Setting t=1 in the function of height, the maximum height of baton will be obtained at time t=1 sec
h(1)=−16(1)2+32(1)+6
=22 feet
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What happens to the gravitation force between two objects that are 15 m apart, when one of them moves 3 m closer? (1 point).
Answer: The gravitation force between two objects that are 15 m apart, when one of them moves 3 m closer then it increases by a factor of 1 9/16.
Reason:
Mathematically it can be represented as, F = Gm1m2/r2 Where, F is the Gravitational force between two objects measured in Newton (N). G is the Universal Gravitational Constant with a value of 6.674 × 10-11 Nm2kg-2.
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