Answer:
(I)W=18×10³ J
(ii) P=720W
Explanation:
30 Bricks = 1brick weight× 30 Bricks
30 Bricks= 12×30
=360N
Distance=50m
Time= 25s
1. Work done= Force× Distance
=360×50
= 18×10³ J
2. Power= Work done/ Time
18×10³/25
Power= 720W.
If a satellite is in geosync orbit and you have satellite TV which needs a dish put on their house which doesn't have too move.
Answer:
The Carnot engine has zero power
Explanation:
Although theoretically the Carnot engine has more efficiency than the real engine. In practice however they tend to have zero power.
This is because all its processes are reversible (that is isothermic and adiabatic).
So the system equilibrates with its surroundings at every point in time. This makes work done very slow and the power generated is zero.
Carnot cycles requires attaining isothermal heat transfers which is quite difficult and take a long time. Also a pump that can handle liquid-vapour phase mixture will be required.
This is not practical.
