Answer:
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Explanation:
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Answer:
%
Explanation:
We have given cooler temperature that is
= 6°C =273+6=279 K
And the warm temperature of water that is 
The maximum possible efficiency is given by 
So maximum efficiency
%
Answer:
394.26 m
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.8 m/s²



Total time taken by the stone to reach the ground is 4.49+4.49 = 8.97 seconds

The times are equal so,

The height is 394.26 m