In each cycle, a heat engine performs 710 J of work and exhausts 1480 J of heat. What is the thermal effiency?
1 answer:
You might be interested in
Answer: catching the ball is a better choice.
Explanation:
The collision of 2 objects involves involves large impact force since the force is inversely proportional to the time in which the momentum of the object changes.
Mathematically
If we catch the ball we increase the time in which the momentum of the ball is decreased thus the impact force that acts on us is lower as larger time is allowed for the ball to decrease it's momentum.
If we allow the ball to hit us the momentum of the ball changes in a short period of time thus applying a large impact force on our body thus increasing the chances of toppling.
Answer:
The distance covered by the rocket after fuel ran out is
Explanation:
Given that the rocket moves with an acceleration
time
Since the rocket starts from rest initial velocity
The distance it travelled within this time is given by
Velocity at this point is given by
Given that at this height it runs out of fuel but travels further. Here final velocity (maximum height), initial velocity
and time to zero velocity
Thus it travels more after fuel running out. The distance covered during this period is given