Assuming an engine operates as a reversible heat engine calculate the outlet temperature (temperature of rejected heat) that achieves a thermal efficiency of 63% if the engine takes in heat at 640°c .

Explanation:

The efficiency of a reversible heat engine is given by:

where

Tc is the cold temperature (outlet temperature)

Th is the hot temperature (temperature of the source)

In this problem, we know:

So, we can calculate the outlet temperature by re-arranging the formula:

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table

continuous conducting path for current, power supply