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Author Question: Is it possible for the total mechanical energy of a moving particle to be negative? a. No, because ... (Read 92 times)

ghost!

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on: Jul 28, 2018
Is it possible for the total mechanical energy of a moving particle to be negative?
 a. No, because a moving particle has positive kinetic energy.
  b. No, because potential energy cannot have a value more negative than the value of the positive kinetic energy of the particle.
  c. Only if friction is involved. d. Yes

Question 2

If a heat engine has an efficiency of 30 and its power output is 600 W, what is the rate of heat input from the combustion phase?
 a. 1800 W
  c. 2000 W
  b. 2400 W
  d. 3000 W


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todom5090

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Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

C


ghost!

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


todom5090

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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