Answer:
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Explanation:
Answer:
710.79 Joules
898.56 Joules
264.45 K
172.2 K
Explanation:
W = Work done
Q = Heat added = 1248 J
= Temperature of hot reservoir = 615 K
= Temperature of cold reservoir
Efficiencies of engine A and B
= 0.57
= 0.72
Efficiency is given by
Work done by engine A is 710.79 Joules
Work done by engine B is 898.56 Joules
Efficiency
The temperature of the cold reservoir is 264.45 K
The temperature of the cold reservoir is 172.2 K
The law of conservation tells us that no mass is lost. This is true because when wood burns or turns into ash, some of it is escaped as gases like carbon dioxide and water vapor into air . If we calculate the mass of these atmospheric gases that evolved when the wood turned into ash, we would find that the total mass of all these substances including the ash is equal to the log of wood.