What is the characteristic that distinguishes fermions from bosons?
A) their mass
B) their electric charge
C) their spin
D) their size
E) their speed of travel
C) their spin
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Answer the following statement(s) true (T) or false (F)
1. When you go over the crest of a hill in a roller coaster, a force appears to lift you up out of your seat. This is a fictitious force 2. If your car is hit from behind, you are suddenly pressed back into the seat. The normal force that the seat exerts on you is a fictitious force. 3. You are pressed downward toward the floor as an elevator begins to move upward. The force pressing you down is a fictitious force.
Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value. If the speed of the water in the larger section of the pipe was what is its speed in this smaller section?
A) 49 m/s B) 42 m/s C) 31 m/s D) 27 m/s
Assuming equal rates of acceleration in both cases, how much longer would it take a car to stop if braking from 56 mi/h than from 28 mi/h?
A) 8 times as long B) 4 times as long C) 2 times as long D) 1.4 times as long E) the same in both cases
If an electromagnetic wave has components Ey = E0 sin(kx - ?t) and Bz = B0 sin(kx - ?t) , in what direction is it traveling?
A) +x B) +y C) -y D) +z E) -x