Answer:
23.9m
Explanation:
step one:
This problem is on energy.
we can proceed by using the expression for potential energy to solve for height h
we know that
PE=mgh
given that
mass m= 5kg
PE= 1176 joules
step two:
we can substitute our data and find h
1176= 5*9.81*h
1176=49.05h
step three:
divide both sides by 49.05 we have
1176/49.05=h
h=23.9 m
The height of the tree is 23.9m
When it is not moving or on the ground
Power is calculated by dividing the work done with the time interval of the motion. Work, on the other hand, is force times the distance traveled. Therefore, we can calculate as follows:
60.0 mi/h = 26.82 m/s
The car accelerates at:
<span>v2 = v1 + at </span>
<span>a = [v2 - v1] / t </span>
<span>a = 1.49m/s² </span>
<span>The distance it travels at this acceleration in 15.0 s is: </span>
<span>d = [v1 + v2] t / 2 </span>
<span>d = (0 + 22.4m/s)15.0s / 2 </span>
<span>d = 168m </span>
<span>P = m (a)(d) / t </span>
<span>= (1300kg) (1.49m/s²) (168m) / 15.0s </span>
<span>= 22,700 W</span>
Answer:
90.3125 m
Explanation:
a = 10m/s^2 (constant)
S=height
U=initial velocity
a= gravitational acceleration
t= time
s = 0 + 1/2 * 10 * 4.25 ^2
u is 0 because it is dropped without velocity
s =90.3125 m
Answer:
The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system. In equation form, the first law of thermodynamics is ΔU = Q − W.
The internal energy of ideal gas is U = cV The change in internal energy for ideal gas is therefore ∆U = cV ∆T, where cV is specific heat (at constant volume), and ∆T is change in tem- perature.
Explanation:
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