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Author Question: A plane flies directly from city A to city B, which are separated by 2300 mi. From A to B, the plane ... (Read 64 times)

lbcchick

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on: Jul 29, 2018
A plane flies directly from city A to city B, which are separated by 2300 mi. From A to B, the plane flies into a 65 mi/h headwind. On the return trip from B to A, the wind velocity is unchanged.
 
  The trip from B to A takes less than the trip from A to B. What is the airspeed (assumed constant) of the plane relative to the air (that is, the airspeed)?
  A) 530 mi/h B) 610 mi/h C) 480 mi/h D) 400 mi/h

Question 2

In which of the following processes does the system's rest mass change?
 
  A) An automobile speeds up.
  B) A rubber ball is squeezed.
  C) The rest mass changes in both of the above processes.
  D) The rest mass changes in neither of the above processes.


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LVPMS

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Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

B


lbcchick

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Reply 2 on: Jul 29, 2018
Gracias!

kjohnson

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Reply 3 on: Yesterday
Excellent

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