Sunday
September 21, 2014

Homework Help: physics......PLEASE HELP!!

Posted by anonymous on Wednesday, February 14, 2007 at 6:59pm.

A steam engine absorbs 1.98*10^5 J and expels 1.49*10^5 J in each cycle. Assume that all of the remaining energy is used to do work.

a. What is the engine's efficiency?
b. How much work is done in each cycle?

If a gasoline engine has an efficiency of 21 percent and loses 780 J to the cooling system and exhaust during each cycle, how much work is done by the engine?

Efficiency= useful work/inputwork * 100



.21 Input work= 780J
solve for input work
thenuseful work= .79*input work

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

phy - An engine absorbs 2000j of heat from a hot reservoir and expels 750j to a ...
Physics - In each cycle of its operation, a heat engine expels 6,100 J of energy...
Physics - In one cycle, an engine burning a mixture of air and methanol (methyl ...
PHYSICS DUE SOON - In each cycle of its operation, a heat engine expels 6,100 J ...
physics - A heat engine absorbs 848 J of energy per cycle from a high-...
phy - An engine absorbs 2000J of heat from a hot reservoir and expels 750J to a...
physics - An engine absorbs 2000J of heat from a hot reservoir and expels 750J ...
physics - With each cycle, a 2650-W engine extracts 2330 J from a thermal ...
physics - A theoretical gasoline engine runs with 76 percent efficiency. It is ...
Physics - In one cycle a heat engine absorbs 450 J from a high-temperature ...

Search
Members