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 129 times)

lbcchick · **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.