To find the magnitude of the tension in rope A, we need to consider the forces and torques acting on the system.
In this problem, the forces acting on the system are the weight of the block and the tensions in ropes A and B. The torques are the forces acting on the ropes multiplied by their distances from the axis of rotation.
We can use the concept of equilibrium to solve this problem. When an object is in equilibrium, the sum of the forces and the sum of the torques must be zero. In this case, the forces on the system are balanced, so the sum of the forces is zero. We can write this as:
$$T_A + T_B - W = 0$$
where $T_A$ and $T_B$ are the tensions in ropes A and B, and $W$ is the weight of the block. We are given that $T_B = 3200 \text{ N}$ and $W = 500 \text{ N}$.
Next, we need to consider the torques on the system. If the axis of rotation is placed on rope A, the only torque acting on the system will be the torque due to the tension in rope B.
The torque due to the tension in rope B is given by the equation $\tau = rT$, where $\tau$ is the torque, $r$ is the distance from the axis of rotation to the point where the force is applied, and $T$ is the force.
In this case, the distance from the axis of rotation to the point where the force is applied is $r = 10 \text{ m}$, and the force is the tension in rope B, $T = 3200 \text{ N}$. The torque due to the tension in rope B is therefore $\tau = 10 \text{ m} \times 3200 \text{ N} = 32000 \text{ Nm}$.
Since the system is in equilibrium, the sum of the torques must be zero. We can write this as:
$$\tau = 0$$
Substituting the value of the torque due to the tension in rope B, we get:
$$32000 \text{ Nm} = 0$$
This equation is satisfied, so the system is in equilibrium.
Finally, we can use the equation for the sum of the forces to solve for
Learn more about equilibrium:
https://brainly.com/question/27886175
#SPJ4
Two strings are made of the same material and have waves of equal speed. String 1 is thick; string 2 is thin.
Is the tension in string 1 greater than, less than, or equal to the tension in string 2?
greater than the tension in string 2
equal to the tension in string 2
less than the tension in string 2
PART B
Choose the best explanation from among the following:
Equal wave speeds implies equal tensions.
String 1 must have a greater tension to compensate for its greater mass per length.
String 2 will have a greater tension because it is thinner than string 1.
The tension in string 1 is lesser than to the tension in string 2.
What is meant by tension in a string?
It is possible to refer to tension as the action-reaction pair of forces acting at each end of the aforementioned elements. Tension is defined as the pulling force transmitted axially by a string, rope, chain, or other similar object, or by each end of a rod, truss member, or other comparable three-dimensional object.
The tension in the string has a square root relationship with wave speed, while the linear density of the wire has a square root relationship with wave speed. v=sqrt(T/u)
A larger thickness suggests a higher linear density (mass per length. Thus, the speed would be slower. The wave in string 1 moves slower than the wave in string 2, and vice versa.
According to a thick string, there is a lot of mass per length and the wave speed is slow.
To know more about tension in a string use link below:
https://brainly.com/question/24994188
#SPJ4
in taking your pulse, you count 67 heartbeats in 1 minmin. part a what is the period of your heart oscillations?
The period of your heart oscillations = 60 / 67 cycles/min.
How do you find the period of oscillation?T = 2(m/k) describes this. We may calculate the period and, thus, the frequency by measuring the length of one full oscillation. Be aware that the period of a pendulum is independent of its mass, but the period of a mass on a spring is independent of the spring's length.Number of oscillations that were completed in the given unit of time. f = 1/T = ω/2π 4. Period of time (T) T = 2 /Section overview. A repetitive oscillation is known as periodic motion. The period T is the length of one oscillation. The frequency f is the number of oscillations per unit of time.Given data :
Time taken for 67 heart beats = 1 min = 1* 60 seconds =60 s The time taken for 1 heart beat = 60 / 67
Learn more about period of oscillation refer to :
https://brainly.com/question/22499336
#SPJ4
A painter (of mass 79 kg) needs to reach out from a scaffolding to paint the side of a building, so he lays a plank across two bars of the scaffolding, and puts a heavy bucket of mass 23 kg directly over one of the bars (see figure). You can assume the plank is massless, and is long enough to reach to the other building. Show answer no attempt if the bars are separated by a distance 2. 9 m, how far, d, from the bar on the the right can the painter walk before the plank starts to fall?
0.84 m is the distance the painter walk before the plank starts to fall.
What is Torque?Torque is a measure of the force that rotates an object about an axis. A force accelerates an object with linear kinematics. Similarly, torque causes angular acceleration. Therefore, torque can be defined as the rotational equivalent of a linear force. The straight line around which an object rotates is called the axis of rotation. In physics, torque is simply the tendency of a force to twist or twist. Various terms such as moment and moment of force are used interchangeably to describe torque. The distance from the point of force application to the axis of rotation is sometimes called the moment arm or lever arm.
Mass of the painter (m₁) = 79 kg
Weight of painter (w₁) = 79 × 9.8
= 774.2 N
Mass of bucket (m₂) = 74 kg
Weight of bucket (w₂) = 23 × 9.8
= 225.4 N
Distance between them (L) = 2.9 m
Let d be the distance at which the painter can walk before the plank starts to fall.
At distance d, the torque due to painter and bucket is equal to each other:
T₁ = T₂
w₁d = w₂L
d = (w₂L)/w₁
d = (225.4 × 2.9)/774.2
d = 0.84 m
To know more about torque, visit:
https://brainly.com/question/29024338
#SPJ1
question 91 pts a 0.6 kg squirrel falling at 14 m/s hits in a pile of leaves and comes to rest in 2 s. find the normal force of the leaves on the squirrel as it comes to rest.
If a 0.6 kg squirrel falling at 14 m/s hits a pile of leaves and comes to rest in 2 s , the normal force of the leaves on the squirrel as it comes to rest would be 4.2 Newtons.
What is Newton's second law?
Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
As given in the problem a 0.6 kg squirrel falling at 14 m/s hits in a pile of leaves and comes to rest in 2 s.
The change in the moment of the squirrel = 0.6 × 14
=8.4 Kg - m/s
The normal force = rate of the change of the momentum
= 8.4 / 2
= 4.2 Newtons
Thus, the normal force of the leaves on the squirrel as it comes to rest would be 4.2 Newtons.
Learn more about Newton's second law, here
brainly.com/question/13447525
#SPJ1
A linear, ideal spring that is stretched by 8. 0 cm has an elastic potential energy of 20 j. What is the elastic potential energy of the same spring when it is stretched by 12 cm?.
The elastic potential energy in the spring at this elongation is 45J.
What is elastic potential energy?
The energy that is stored when a force is used to deform an elastic object is known as elastic potential energy. Until the force is released and the item bounces back to its original shape, doing labor in the process, the energy is retained. The item may be compressed, stretched, or twisted during the deformation.
To solve this problem we need to use the equations related to Elastic Potential Energy, which allows us to know the Energy stored in a spring based on its elastic constant and its respective compression. By definition it is described as
[tex]P E=\frac{1}{2} k x^2[/tex]
Where,
k = Spring constant
x = Displacement
Our values are given as
[tex]x_1=0.08 \mathrm{~m}[/tex]
As we do not know the spring constant but if the energy stored at the compression given then,
[tex]\begin{aligned}& P E=\frac{1}{2} k x^2 \\& 20=\frac{1}{2} k(0.08)^2 \\& k=6250 \mathrm{~N} / \mathrm{m}\end{aligned}[/tex]
In the case of the second compression and understanding that the spring constant is intrinsic to the internal force of the spring, then
[tex]x_2=0.12 m$$[/tex]
Replacing,
[tex]$$\begin{aligned}& P E=\frac{1}{2}(6250)(0.12)^2 \\& P E=45 . J\end{aligned}$$[/tex]
Therefore the elastic potential energy in the spring at this elongation is 45J.
To learn more about potential energy visit:https://brainly.com/question/24284560
#SPJ4
in which direction does a first quarter moon rise? a) north b) south c) east d) west e) the moon becomes a first quarter moon only after it has risen and changed phase.
The first quarter moon rises in the East. Option (c) is the right answer.
The first quarter moon occurs halfway between the new moon and the full moon. One-quarter of the moon is visible from Earth, meaning that you see half the daylit side of the moon.
Just like the Sun and the nighttime stars, the Moon's apparent rising in the east and set in the west each day is not from the Moon's orbit around the Earth, it's from the Earth spinning. The lunar orbit is slower and harder to see but you can still spot it.
The moon rises in the east and sets in the west, every day. It has to. The rising and setting of all celestial objects are due to Earth's continuous daily spin beneath the sky.
To learn more about First quarter moon:
https://brainly.com/question/13209515
#SPJ4
solar radiation can be absorbed by the earth's surface or reflected back into space. the ratio of reflected radiation to absorbed radiation is known as albedo. which of the following surfaces has the lowest albedo?
When solar energy is transmitted straight backward from a surface, reflection takes place. Albedo is the portion (or percentage) of radiation that is reflected back.
As more solar energy is received, more heat is reflected back into space, raising the temperature of the atmosphere. The Earth system does not become hotter as a result of solar radiation that Earth's surface or atmosphere reflect back into space. Heat is produced as a result of absorbed radiation. Only a small portion of the energy that reaches the Earth's surface is reflected. Around 30% of the incoming radiation is reflected back to space and does not heat the surface, leaving the remaining 70% to be absorbed by the atmosphere and the Earth's surface.
Learn more about energy here-
https://brainly.com/question/1932868
#SPJ4
you observe a galaxy with a hydrogen beta absorption line 496.0 nm. the laboratory wavelength of this line is 486.1 nm. what is the galaxy's distance from us in mega-light years (mly)?
The galaxy with a hydrogen beta absorption of 496 nm then the galaxy's distance from us in mega-light years (mly) will be equal to 277.54 Mly.
What is Wavelength?
The distance between two identical locations (adjacent crests) in successive cycles is known as the wavelength, and it is used to describe waveform signals that are transmitted over wires or into space. Typically, in wireless systems, this length is specified in meters (m), centimeters (cm), or millimeters (mm).
As per the given information in the question,
The line's hydrogen laboratory wavelength, λ = 486.1 nm
The galaxy's spectrum's wavelength, λ' = 496.0 nm
Then, the change in wavelength,
Δλ = λ' - λ
Δλ = 9.9 nm
The speed of light, c = 2.998 × 10⁵ km/s
Use the equation of Doppler's effect,
v = c × Δλ/λ
v = 6,105.75 km/s
So, the radial velocity will be 6105.78 km/s.
v = H₀d
Here, v is the velocity of the galaxy, d is the distance between galaxies and H₀ is Hubble's constant.
d = v/H₀
d = 6105.75/22
d = 277.54 Mly
To know more about Wavelength:
https://brainly.com/question/13533093
#SPJ1
a cd has a mass of 17 g and a radius of 6.0 cm. when inserted into a player, the cd starts from rest and accelerates to an angular velocity of 21 rad/s in 0.52 s. assuming the cd is a uniform solid disk, determine the net torque acting on it.
Assuming the cd is a uniform solid disk, Then the net torque acting on it is τ≈7.4×10⁻⁴ N
The product of an object's moment of inertia and angular acceleration is the torque operating on that item. We must know the CD player's moment of inertia and angular acceleration in order to calculate the torque operating on it.
Angular Acceleration:
α=ω2−ω1/t
α=22 rad/s²−0/0.91
α=24.17582rad/s²
Momemt of inertia:
I=1/2mr²
I=1/2(17×10⁻³ kg)(6.0×10⁻²m)²
I=0.0000306 kg.m²
Now, Torque:
τ=Iα
τ=(0.0000306)(24.17582)
τ=0.000739780092 kg⋅m²/s2
τ≈7.4×10⁻⁴ N
Therefore, Torque≈7.4×10⁻⁴ N
Learn more about Torque here:
https://brainly.com/question/29024338
#SPJ4
if 4 different amplitudes are used, how many bits can be transmitted with each amplitude change? qizzlet
if 4 different amplitudes are used, the numbers of bits that can be transmitted with each amplitude change is 2 bits.
What in physics is the amplitude?Distance between the wave's resting position and its highest displacement is known as amplitude. Frequency is the quantity of waves that pass by a particular place each second.
The distance between the center line (or the still position) and the top or bottom of a wave's crest or trough is known as the amplitude (). Be cautious when using this amount because a diagram may not always show the center line. Meters are used to measure amplitude ( ).
For example:
If there is 4 amplitudes, it will be: 00,01,10,11 then 2 bits
If there is 8 frequencies it will be: 000,001,010,011 ,100,101,110, 111 and then 3 bits
Learn more about amplitudes from
https://brainly.com/question/413740
#SPJ1
See full question below
With Amplitude Shift Keying (ASK), if 4 different amplitudes are used, how many bits can be transmitted with each amplitude change?
a long, straight wire carries a current i (see figure below). which of the following statements is true regarding the magnetic field due to the wire? more than one statement may be correct.
For a long straight wire carrying conductor the magnitude of the magnetic field produced around it is proportional to I/r, and the direction is out of the page at P.
A magnetic field is produced by moving charges. Charges are constantly moving in a conductor carrying current; as a result, magnetic fields are created all around the conductor.
The right-hand thumb rule indicates the direction of this magnetic field. The thumb of the right hand is used in this rule to indicate the current's direction. The direction of the magnetic field surrounding the wire is indicated by the curled fingers.
The magnitude of the magnetic field produced by the current carrying conductor depends on the following factors:
The magnitude of the current flowing through the conductor
The distance to the point where the field value is calculating.
To know more about the magnetic field here
https://brainly.com/question/14115512
#SPJ4
when ashley sat on a rotating stool holding a set of weights close to her body, her rate of rotation changed when she moved the weights away from her body. did her rate or rotation slow down or speed up? why did this occur? did this violate the conservation of energy?
Reduced moment of inertia because of the frictional effects of the Moon-driven tides.
What is conservation of energy?A fundamental law of chemistry and physics stating that despite internal changes, an isolated system's total power remains static. The first conservation of energy is based on this principle, which is far more commonly phrased as the fact that electricity cannot be generated or destroyed. According to the rule of conservation of energy, energy can only be transformed from one type of energy to another and cannot be created or destroyed. This indicates that unless energy is added from the outside, a system constantly has the same quantity of energy.
What is the principle of conserving energy?According to the conservation of energy principle, energy is neither created nor destroyed. It has the capacity to change types. The validity of the conservation of energy principle, like that of mass, depends on experimental observations; as a result, it is an empirical law.
To know more about Conservation of Energy visit:
https://brainly.com/question/11264649
#SPJ4
the largest temperature change ever recorded in a 24-hour period occurred in loma, montana, on january 15th, 1972. during this time, the temperature rose from -54 to 49, an increase of 103 degrees fahrenheit. find the magnitude of this change in kelvin.
Loma saw greatest 24-hour temperature fluctuation on January 15, 1972. Temperature rose by an equal 103 degrees from -54 degrees to 49 degrees. This sets global standard for a 24-hour changes in temperature.
Why is 273 at the highest point on the Kelvin scale?The distance here between kelvin (K), a component of kelvin scale, and then a degree on the Temperature scale depends on where zero lies. This melting point seems to be the zero point upon that Celsius scale, whereas absolute zero is really the zero point upon that Kelvin scale. Accordingly, 0oK is equal to -273.15oC and 0oC is equivalent to 273.15 kelvins.
Why not swap the kelvin units for Celsius?The freezing point, boiling point, or any combo of water and a chemical were all taken into consideration when the Celsius and Fahrenheit scales were developed. Scientists adopted the Absolute temperature scale because they desired a scale where 0 depicts the total lack of thermal energy.
To know more about kelvin visit:
https://brainly.com/question/14132731
#SPJ4
a 500 kg motorcycle accelerates from rest to 25 m/s over a time interval of 5.5 s. find the force exerted on the motorcycle by the road due to friction.
The force exerted on the motorcycle of mass 500 kg is 2272.72 N.
How to calculate for force?Force can be calculated by multiplying the mass of a body to its acceleration. The S.I Unit of force is Newton (N).
To calculate the force exerted on the motorcycle, we use the formula below.
Formula:
F = m(v-u)/t.......... Equation 1Where:
F = Force on the motorcyclem = Mass of the motorcyclev = Final velocity of the motorcycleu = Intial velocity of the motorcyclet = Time taken to change its velocity.From the question,
Given:
m = 500 kgv = 25 m/su = 0 m/st = 5.5 sSubstitute these values into equation 1
F = 500(25-0)/5.5F = 2272.72 NHence, the force acting on the motorcycle is 2272.72 N.
Learn more about force here: https://brainly.com/question/25239010
#SPJ1
a particle with charge +4.20 nc is in a uniform electric field e⃗ directed to the left. the charge is released from rest and moves to the left; after it has moved 6.00 cm, its kinetic energy is +2.20×10−6 j.
(a) The work done is 1.50 x 10^-6 J
(b) The potential of the starting point with respect to the endpoint is 357.14 V.
(c) The magnitude of E is 5952.38 N/C.
Given that,
Charge = 4.20 nC
Distance = 6.00 cm
Kinetic energy K.E = 1.50 x 10^-6 J
The particle start from rest. So, the initial kinetic energy i zero.
(A) We need to calculate the work by the electric force
Using formula of work done
W = ∆K.E
W = K.Ef - K.Ei
Put the value into the formula
W = 1.50 × 10^-6 - 0
W = 1.50 x 10^-6 J
The work done is 1.50 x 10^-6 J
(B). We need to calculate the potential of the starting point with respect to the endpoint
We know that.
Change in potential energy = change in kinetic energy
∆P.E = ∆K.E
So, U = 1.50 x 10^-6
Using formula of potential
V = U/q
Put the value into the formula
V = 1.50 × 10^-6/4.20 x 10^-9
V = 357.14 V
The potential of the starting point with respect to the endpoint is 357.14 V
(C) We need to calculate the magnitude of E
Using formula of work done
W = F x r (1)
Using formula of force
F = qE
Put the value in the equation (1)
W = qE x r
E = W/q x r
Put the value into the formula
E = 1.50 x 10^-6/4.20 x 10^-9 x 6.00 x10^-2
E = 5952.38 N/C
Hence, The magnitude of E is
5952.38 N/C
Learn more about Energy here:
https://brainly.com/question/13881533
#SPJ4
2) Which type of bond will form between these elements?
WHICH BOND?
the motion of a piston in an auto engine is simple harmonic. if the piston travels back and forth (side to side) over a distance of 12 cm, and the piston has a mass of 1.5 kg, what is the maximum speed of the piston and the maximum force acting on the piston when the engine is running at 3 800 rpm?
The maximum speed of the piston is 8.6 m/s and the maximum force acting on the piston when the engine is running at 3 800 rpm is 7 486 N
The given information is that the motion of a piston in an auto engine is simple harmonic. if the piston travels back and forth (side to side) over a distance of 12 cm, and the piston has a mass of 1.5 kg, The maximum speed of the piston is determined by the equation for the simple harmonic motion:
v = (2πfA)^0.5 where f is the frequency of the motion (in this case, 3 800 rpm), and A is the maximum displacement (in this case, 12 cm).
v = (2π(3800)(0.12))^0.5 v = 8.6 m/s.
The maximum force acting on the piston is determined by the equation for the simple harmonic motion:
F = mω^2A, where m is the mass of the piston (in this case, 1.5 kg), ω is the angular velocity (in this case, 2πf = 2π(3800) = 23 883 rad/s) and A is the maximum displacement (in this case, 12 cm).
F = (1.5)(23 883)^2(0.12) F = 7 486 N
To know more about speed refer to the link brainly.com/question/28224010
#SPJ4
an explosion in a rigid pipe shoots out three pieces. a 6 g piece comes out the right end. a 4 g piece comes out the left end with twice the speed of the 6 g piece. from which end does the third piece emerge?
In an explosion a 6 g piece comes out of the right end and a 4 g piece comes out of the left end at twice the speed of the 6 g piece and the third piece comes out of the right end.
Initially all three balls are at rest so u = 0
Given m1 = 6g and m2=4g where m is the mass of balls
Let v1 be the velocity of the first ball = v(i) (denoted as (i) since the right end points to the positive X axis)
Let velocity v2 of second ball = 2(v)(-i) (denoted as (-i) since left end points negative X axis)
Mass of the third ball m3 = m and its velocity v3 = v'
By applying conservation of momentum
m1(u1) + m2(u2) + m3(u3) = m1(v1) + m2(v2) + m3(v3)
Since all balls are initially at rest u1 = u2 = u3 = u = 0
0 = (6×10⁻³)(v)(i) + (4×10⁻³)(2v)(-i) + m(v')
m(v') = (2×10⁻³)(v)(i)
v’ = (2×10⁻³)(v)(i)/(m)
So positive (i) indicates right end
So the third ball comes from the right end.
To learn more about momentum click here https://brainly.com/question/24030570
#SPJ4
the velocity function is for a particle moving along a line. find the displacement and the distance traveled by the particle during the time interval . displacement
The displacement and the distance traveled by the particle during the time interval [-2, 5] are -26.83 units and 27.17 units.
Displacement is the straight path between the initial and end positions, whereas distance traveled is the actual length the body covers.
Here, the velocity is given as v(t)=(-t²)+3t-2 and the interval is [-2, 5]. By integrating the given velocity function, we will get the total distance traveled and displacement within the given interval.
The displacement is given as follows,
[tex]\begin{aligned}\int\limits^5_{-2} v(t)dt&=\int\limits^5_{-2} ((-t^2)+3t-2)dt\\&=\left[\frac{-t^3}{3}+\frac{3t^2}{2}-2t\right]^5_{-2}\\&=\left(\frac{5^3}{3}+\frac{3(5)^2}{2}-2(5)\right)-\left(-\frac{(-2)^3}{2}-2(-2)\right)\\&=-\frac{85}{6}-\left(\frac{38}{3}\right)\\&=-\frac{161}{6}\\&=-\mathrm{26.83\;units}\end{aligned}[/tex]
The total distance traveled is given by,
[tex]\begin{aligned}\int\limits^a_b|v(t)|dt&=\int\limits^5_{-2}|(-t^2)+3t-2|dt\\&=\int\limits^1_{-2}(t^2-3t+2)dt+\int\limits^2_1(-t^2-3t+2)dt+\int\limits^5_2(t^2-3t+2)dt\\&=\left[\frac{t^3}{3}-\frac{3t^2}{2}+2t\right]^1_{-2}+\left[-\frac{t^3}{3}+\frac{3t^2}{2}-2t\right]^2_{1}+\left[\frac{t^3}{3}-\frac{3t^2}{2}+2t\right]^5_2\\&=\frac{27}{2}+\frac{1}{6}+\frac{27}{2}\\&=\frac{163}{6}\\&=\mathrm{27.17\;units}\end{aligned}[/tex]
Therefore, the displacement and distance traveled are calculated using the given time interval.
The complete question is -
The velocity function is v(t)=(-t²)+3t-2 for a particle moving along a line. Find the displacement and the distance traveled by the particle during the time interval [-2, 5].
To know more about velocity:
https://brainly.com/question/19979064
#SPJ4
the scattering of sunlight by the mixture of gas molecules in air results in the blue color of the sky. calculate the energy (in joules) of a single photon of blue light with a frequency of 7.30 × 10¹⁴ hz. (h
The energy (in Joules) of a single photon of blue light = [tex]4.83 * 10^-^1^9 J[/tex]
What is the energy of photon?
The energy that a single photon carries is known as photon energy. Energy is inversely correlated with electromagnetic frequency of the photon.
The energy of a photon is given by the formula
E = h*v
where,
h = planks constant
v = frequency
Given,
h = [tex]6.626 * 10^-^3^4 J s[/tex]
v = 7.30 × [tex]10^1^4[/tex] Hz
1 Hz = 1 [tex]s^-1[/tex]
v = 7.30 × [tex]10^1^4 s^-1[/tex]
E = [tex]6.626 * 10^-34 * 7.30 * 10^1^4[/tex]
E = [tex]48.36 *10^-^2^0 J[/tex]
E = [tex]4.83 * 10-19 J[/tex]
The energy (in Joules) of a single photon of blue light = [tex]4.83 * 10^-^1^9 J[/tex]
To know more about energy of photon, check out:;
https://brainly.com/question/28886770
#SPJ4
if the human body has an average density of 973 kg/m3, what fraction of a person is submerged when floating gently in fresh water?
The fraction of the person submerged when floating gently on the freshwater is 0.973.
The average density of the human body = 973 kg/m³.
According to the Archimedes' principle, when a body floats in a fluid it experience is an upward force on it which is called buoyancy the buoyancy on an object is equal to the weight of the fluid that is displaced by the body.
If a body floats than the buoyancy must be equal to the weight of the body.
therefore buoyancy B can be given as
B = Vρg
V is the volume of the body,
ρ is the density of the body.
Also
B = V'xg
V' is the portion of the body submerged in fresh water,
x is the density of the fresh water.
Density of fresh water is 1000kg/m³.
Equating both the equations of 'B'
Vρ = V'x
ρ/x = V'/V
V'/V = 973/1000
So, the fraction of the human body submerged in freshwater is 0.973.
To know more about buoyancy,
https://brainly.com/question/28167164
#SPJ4
what eyepiece focal length will give the microscope an overall angular magnification of 250? assume a length ll
The eye piece focal length is fe = -0.19 m where, fe= focal length of eye ,
What is the focal length?What Is Focal Length? Focal length is the distance (measured in millimeters) between the point of convergence of your lens and the sensor or film recording the image. The focal length of your film or digital camera lens dictates how much of the scene your camera will be able to capture.
Briefing : According to the question we assume ,
let The focal length is F(o) =5.5 mm = -.00055m and distance between objective and eyepiece = 19 cm
This negative sign shows the the microscope is diverging light
The angular magnification is m=250
The distance between the objective and the eyepieces lenses is z=19cm=0.19m
Generally the magnification is mathematically represented as
m={z-fe/fe}{0.25/f(o)}
Where fe is the eyepiece focal length of the microscope
Now making fe the subject of the formula,
fe=z/{(1-1{M-fo)/0.25}
then : fe=0.19/([tex]1-(\frac{250+ - 0.0055}{.25} )[/tex])}
= fe = -0.19 m
To know more about Focal length visit :
https://brainly.com/question/16188698
#SPJ4
Complete Question : The distance between the objective and eyepiece lenses in a microscope is 19 cm . The objective lens has a focal length of 5.5 mm .What eyepiece focal length will give the microscope an overall angular magnification of 250?
the velocity of a wave with a wavelength of 4.700 m and frequency of 54.00 hz is (5 points) 25.38 m/s 33.85 m/s 114.9 m/s 253.8 m/s
The velocity of this wave is 253.8 m/s.
Wavelength is the distance of the starting point of a wave till its ending point. The length of the wave is known as wavelength. The waves will interact via constructive interference, which is possible only when the wavelength and phase of the waves are the same.
Frequency is the number of waves that pass a fixed point.
Given,
Wavelength = 4.7 m
Frequency = 54 Hz
Velocity of any wave is given by a formula,
Velocity = wavelength * frequency
Velocity = 4.7 * 54
Velocity = 253.8 m/s
Therefore, the velocity of this wave is 253.8 m/s
To learn more about velocity, refer: https://brainly.com/question/18084516
#SPJ4
a student has built a 15 cm long pinhole camera for a science fair project. she wants to photograph her 180 cm tall friend and have the image in the film be 5 cm high. how far should the front of the camera be from her friend?
Considering that there is a certain distance between both the student's friend as well as the camera's front, 540 cm or 5.4m
What is distance?
Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting as well as ending point. The term "displacement" refers to a change in an object's position. It is a vector quantity with a magnitude and direction. The symbol for it is an arrow pointing from the initial position to the ending position. For instance, if an object shifts from position A to position B, its position changes. Displacement is the term used to describe this shift in an object's position.
Let d be determined by the separation between the student's friend and the camera's front.
5.0cm/15cm = 180cm/d
d = (15cm)(180cm)/5.0cm
= 540cm or 5.4m
To learn more about distance
https://brainly.com/question/114551
#SPJ4
an inventor designs a machine that he claims will lift a 30 kg object with the application of only a 25 n force. if the inventor is correct, what is the shortest possible distance through which the force must be applied for each meter that the object is raised?
The shortest possible distance through which the force must be applied must be 0.83 meters.
What is force?
A force is indeed an influence that can alter an object's motion according to physics. A force may cause an object to mass to accelerate when it changes its velocity, such as when it moves away from rest. An intuitive way to describe force is as a push or even a pull. A force is a vector quantity because it has both magnitude and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F. (formerly P). The net force acting on an object seems to be equal to the speed that its momentum changes over time, according to Newton's second law in its original formulation.
The shortest possible distance through which the force must be applied for each meter that the object is raised is 0.83 meters.
This is because the force needed to lift the object is 25 N,
and the mass of the object is 30 kg (30 x 9.8 = 294 N).
Therefore, the amount of work done for each meter of lifting is 25 N x 0.83 m = 20.75 Joules (J).
This means that each meter of lifting requires 20.75 J of work, and therefore the shortest possible distance through which the force must be applied must be 0.83 meters.
To learn more about force
https://brainly.com/question/12785175
#SPJ4
A ball i thrown at a peed of 15m/ at an angle of 30 degree to the horizontal. Reolve the movement of the ball into it horizontal and vertical component. Ue the equation of motion to work out the component of the ball' velocity and diplacement every 0. 5 econd
Here we have to calculate horizontal distance and vertical displacement of a ball thrown at a particular angle and a particular speed.
How to calculate horizontal distance and vertical displacement？
The ball is thrown at an angle, θ=30o.
Initial velocity of the ball, u=15 m/s
Horizontal range of the ball, R=12.3 m
We know that, R=u cosθ t,
where t is the time of flight
⟹t=5317.3=2 secs
using equation of motion we get:-
−h=ut−1/2gt²
=15×2−1/2×9.8×2²=−10.4
⟹ Height at which the ball reaches, h=10.4 m
The vertical distance fallen during each consecutive second will increase. (i.e., there is a vertical acceleration).
The vertical displacement follows the equation above (y = 0.5 • g • t2).
Furthermore, since there is no horizontal acceleration, the horizontal distance traveled by the projectile each second is a constant value -
Formula for horizontal distance is
x= vix × t=20 m/s
Thus, the initial horizontal velocity of 20 m/s. Thus, the horizontal displacement is 20 m at 1 second, 40 meters at 2 seconds, 60 meters at 3 seconds, etc. We can tabulate it as shown in the attachment.
TIME HORIZONTAL DISPLACEMENT
0 s 0 m
1 s 30 m
2 s 60 m
3 s 90 m
4 s 120m
5 s 150 m
To know more about horizontal distance and vertical displacement, click on https://brainly.com/question/25825784
#SPJ4
Two charged particles repel each other with a force f. If the charge on only one of the particles is doubled and the distance between them is also doubled, then the force will be.
The resultant force will be f/2. This means that the resultant force is half of the original repulsive force between the two charged particles.
What is Coulomb's law?According to B, the electrical force between two charged objects is inversely proportional to the square of the separation distance between the two objects and directly proportional to the product of the charges on the objects.
Mathematical expression of Coulomb's law:
[tex]F=\frac{kQ_{1}Q_{2} }{d^{2} }[/tex]
Here,
F = Electrical force
Q1 = Charge on the first object (in Coulombs)
Q2 = Charge on the second object (in Coulombs)
d = Distance between the two objects (in meters)
k = A proportionality constant (Coulomb's law constant)
According to the problem given, the force would double if one of the charges were doubled. The force would be four times lower if the distance were doubled. These two variations working together would result in a two-fold reduction in force thus resulting into f/2.
To know more about repulsive force please click here https://brainly.com/question/27156060
#SPJ4
7.121 Solve Prob. 7.120, assuming that the magnitude P of the two forces is increased to 120 kN 7.122 A torque of magnitude T 12 kN m is applied to the end of a tank containing compressed air under a pressure to 8 MPa. Knowing that the tank has a 180-mm inner diameter and a 12-mm wall thickness,. Determine the maximum normal stress and the maximum shearing stress in the tank.
Maximum normal stress and the maximum shearing stress in the tank are 60MPa and 18.277 MPa respectively.
Define hoop stress
A "hoop stress" is a stress distribution that maintains its original shape while the stressed item is rotated around a fixed axis. Any force exerted on the cylindrical pipe wall by a pressure differential in a straight, closed pipe will eventually result in hoop stresses.
According to the definition, shearing stress is "a kind of stress that acts parallel to the cross section of the material." Shear forces result in shear stress. They are a pair of forces that have the same magnitude and are directed in the opposite direction and operate on opposite sides of a body. A vector quantity is shear stress.
Given Data
Diameter: d = 180mm
Wall Thickness: t = 12mm
Torque: T = 12kN.m
Pressure in cylinder: p = 8MPa
Inner Radius ,c1 = d/2
c1 = 180/2
c1 = 90*10^-3 m
Outer radius, c2 = c1+ t
c2 = 90+12
c2 = 102*10^-3m
Polar moment of inertia ,J is 3.14/2*(c2^4- c1^4)
J ≈66.968×10^-6 m^4
The maximum torsional shear stress, τ= Tc/J
τ=18.277MPa
The normal stress due to pressure, σ1 = pr/t
σ1 = 60MPa
To know more about shearing stress use link below:
https://brainly.com/question/20630976
#SPJ4
Hydroelectric power plants are most commonly located nearA. coal-powered plants.B. nuclear-power plants.C. artificial reservoirs.D. estuaries.
Answer:
C. Artificial Resevoirs
Explanation:
For two main reasons; the first is the capacity of water of water they contain, and the second one is for mainteinance purpouse.
A heat engine has a cold reservoir of 250 k and a hot reservoir of 715 k. What is the maximum efficiency of the engine? a. 65. 0% b. 60. 8% c. 73. 6% d. 58. 6% e. 69. 1%.
Answer:
Heat in = 715 K
Heat out = 250 K
Heat converted to work = 715 - 250 = 465 K
Efficiency = 465 / 715 = .65
(a) Maximum efficiency = 65%