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Author Question: An amount of work equal to 3.0 J is required to compress the spring in a spring-gun. What is the ... (Read 29 times)

sdfghj

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on: Jul 28, 2018
An amount of work equal to 3.0 J is required to compress the spring in a spring-gun. What is the launch speed of a 15 g marble?
 a. 14 m/s
  c. 18 m/s
  b. 15 m/s
  d. 20 m/s

Question 2

When gasoline is burned, it gives off 46,000 J/g of heat energy. If an automobile uses 13.0 kg of gasoline per hour with an efficiency of 18, what is the average horsepower output of the engine? (1 hp = 746 W)
 a. 47 hp
  c. 67 hp
  b. 110 hp
  d. 40 hp


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lolol

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

D

Answer to Question 2

D


sdfghj

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Reply 2 on: Jul 28, 2018
Gracias!

shailee

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Reply 3 on: Yesterday
Wow, this really help

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