Question

Please check one question? Thanks! :)

According to Carnot, what does the efficiency of a heat engine depend on?

the input temperature only

the exhaust temperature only

the ratio of input temperature to exhaust temperature****My answer****

the ratio of exhaust temperature to input temperature

Answer 1

@radar can you help?

Answer 2

@katielong do you know this?

Answer 3

I'm not too certain, I'd say you're possibly right; It is definitely not one of the top two. Usually efficiency is (output/input) x 100;
if so, the bottom one is more likely? but this is just a guess :)

Answer 4

ok thanks! do you to help me with another question to check?

Answer 5

@katielong

Answer 6

yeah?

Answer 7

ok well my asnwer was correct thank you for that! but next question is:

How does a refrigerator reflect the second law of thermodynamics?
(Points : 1)
The thermodynamic changes in a refrigerator are not spontaneous, and the entropy of the system and surroundings decreases.

The thermodynamic changes in a refrigerator are not spontaneous, and the entropy of the system and surroundings increases. *my answer*

The thermodynamic changes in a refrigerator are spontaneous, and the entropy of the system and surroundings decreases.

The thermodynamic changes in a refrigerator are spontaneous, and the entropy of the system and surroundings increases.

Answer 8

@katielong

Answer 9

I'm not too sure haha, I'm not studying thermodynamics :l

Answer 10

ok thanks though! do you know entropy equation questions though?

Answer 11

nopeeee

Answer 12

ok thank you so much! im good then!

Answer 13

Your answer on entropy is correct