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    Harvard university
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Category > Physics Posted 23 May 2017 My Price 6.00

A huge explosion

  1. A huge explosion is heard 77 kilometers away. How long does it take the sound to travel that far? (Assume ambient air temperature is 24 degrees C).  Record your answer to the nearest whole second. No decimal places in your answer.  Be careful of your units.
  2. The air inside a bicycle tire pump has 178 joules of work done on it as 70 joules of heat are added to it. What is the change in internal energy of the air?
  3. An object falls off of a pier and into Lake Michigan (pure water) where it displaces a total volume of 96.81 cubic feet of water. What is the buoyant force acting on the object in newtons? You will need to convert units in order to answer the problem in Newtons. 

Answers

SuperTutor
(15)
Status NEW Posted 23 May 2017 05:05 AM My Price 6.00

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