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Author Question: A heat engine ________. a. converts work into heat energy b. needs a temperature difference to be ... (Read 124 times)

tth

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on: Jul 28, 2018
A heat engine ________.
 a. converts work into heat energy
  b. needs a temperature difference to be able to work
  c. can be 100 efficient in the absence of friction
  d. needs electricity to be able to run

Question 2

A hunter wishes to cross a river that is 1.5 km wide and flows with a velocity of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 12 km/h with respect to the water. What is the minimum time for crossing?


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EAN94

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

b

Answer to Question 2

0.14 h


tth

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Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

diana chang

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Reply 3 on: Yesterday
Wow, this really help

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