If the temperature of an ideal gas contained in a box is increased
a. the average velocity of the molecules in the box will be increased.
b. the average speed of the molecules in the box will be increased.
c. the distance between molecules in the box will be increased.
d. all of the above.
b
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The direction of the force on a current-carrying wire in a magnetic field is described by which of the following?
A) parallel to the current only B) parallel to the magnetic field only C) perpendicular to the current only D) perpendicular to the magnetic field only E) perpendicular to both the current and the magnetic field
Two identical thermodynamic systems, one at T1 and the other at T2, are placed in thermal contact. When they reach thermal equilibrium, what is true about the final temperature?
1.Tfinal > ½(T1 + T2) 2.Tfinal = ½(T1 + T2) 3.Tfinal < ½(T1 + T2) 4.Not enough information
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What will be an ideal response?
Event 2 occurs a time â^†t after event 1. If event 2 was caused by event 1, which of the following must be true?
A. The distance between event 1 and event 2 can be any amount. B. The distance between event 1 and event 2 is not more than c â^†t. C. There are frames of reference in which event 2 is before event 1. D. There are frames of reference in which event 1 is not related to event 2. E. All of these choices are false.