Question

No heat engine is 100 percent efficient because heat cannot be completely converted to work.

True
False

Answer 1

Answer: true

Step-by-step explanation:

trueeeeeeeeeee

Answer 2

True

Step-by-step explanation:

A heat engine is considered to be 100% efficient if only all the heat is converted into useful work or mechanical energy. Since heat engines cannot convert all the heat energy into mechanical energy, their efficiency can never be 100%.