Acarnot cycle engine operates between a low temperature reservoir at 20°c and a high temperature reservoir at 800°c. if the engine is required to output 20.0 kj of work per cycle, how much heat must the high temperature reservoir transfer to the engine during each cycle?

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law