Author Question: A lawn mower has a 6-horsepower engine (1 HP = 750 W). If the engine has an efficiency of 20, and ... (Read 147 times)

SAVANNAHHOOPER23 · **on:** Jul 28, 2018

A lawn mower has a 6-horsepower engine (1 HP = 750 W). If the engine has an efficiency of 20, and the throttle is such that the engine cycles 10 times a second, the heat that is expelled in one cycle is
a. 1 800 J
b. 2 000 J
c. 2 200 J
d. 2 400 J
e. 2 250 J

Question 2

A gasoline engine absorbs 2 500 J of heat and performs 1 000 J of mechanical work in each cycle. The amount of heat expelled in each cycle is
a. 1 000 J
b. 1 500 J
c. 2 000 J
d. 500 J
e. 3 000 J