When n = energy efficiency and Pin = energy input and Pout = energy output, how can you mathematically represent the correct relationship between the energy you put in something and the energy you get out?
A. n = P out * P in
B. n = P out / P in
C. n = P out - P in

Question

When n = energy efficiency and Pin = energy input and Pout = energy output, how can you mathematically represent the correct relationship between the energy you put in something and the energy you get out?
	A.	n = P out * P in
	B.	n = P out / P in
	C.	n = P out - P in

anonymous · Answer

efficiency is equal to the ratio of energy in and out. efficiency will be equal to or less than one. 
does this help?

anonymous · Answer

yes and no which one is the correct answer??

anonymous · Answer

openstudy doesn't work that way. I'll teach you if you want to learn how to know which is the correct answer, if you want.

anonymous · Answer

if you have the time to help then i would appreciate that

anonymous · Answer

ya

anonymous · Answer

efficiency is a ratio of how much energy is put in to how much energy is put out.

for example
if I asked you what percent is 90 or  100? you'd say..?

anonymous · Answer

90%? or 100%

anonymous · Answer

i dont really know ive never been good at math

anonymous · Answer

yaya, you got it!

anonymous · Answer

Sorry, i was helping another person ^_^

anonymous · Answer

right it would be 90%
efficiency is just a percent. so to get 90% did you divide or times or subtract?

anonymous · Answer

90*100 = 9000 [so not times]
90/100 = 0.90 = 90%  [so divide]
90-100 = -10 [so not subtraction]

anonymous · Answer

OK thank you i think i got the hang of this thanks for your help i appreciate it

anonymous · Answer

yep