Answer:571.09 kJ
Explanation:
Given
Temperature of cooling water from engine exit
After Passing through the radiator its temperature decreases to
specific heat of water
Volume of water
density of water
Thus mass of water
Heat transferred to the surrounding is equal to heat absorbed by cooling water
Answer:
The tension in the string between the blocks is: (C) 3/8 F
Explanation:
We need to apply the Newton's second Law . First we need to add both block masses as:. Then we can find the acceleration of the system as:. Therefore solving for T from the free body diagram, we find: , and adding forces on axle x we get: . Now we can calculate the tension in the string as:.
Answer: Approximately 11.76 joules per second
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Work Shown:
Mass = 40 kg
Force pulling down = (mass)*(gravity) = 40*9.8 = 392 newtons
Roughly 392 newtons of force are pulling down on her.
To climb the steps, she must apply 392 newtons of force upward.
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Displacement = 20*(15 mm) = 300 mm = 0.3 m
Work = Force*Displacement
Work = 392*0.3
Work = 117.6 joules of energy
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Power = (Work)/(Time)
Power = (117.6 joules)/(10 seconds)
Power = (117.6/10) joules per second
Power = 11.76 joules per second, which is approximate