Suppose that we allow an ideal gas containing N molecules to expand slowly and adiabatically to twice its initial volume. By what factor does its multiplicity increase?
A. By a factor of 2.
B. By a factor of 2N.
C. The multiplicity does not change.
D. The answer depends on the gas’s initial volume.
E. The answer depends on the gas’s initial energy.
C. The multiplicity does not change.
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If a net external force acts on a system, what will change?
a. The sum of the momenta of all objects in the system. b. The momentum of no more than one object in the system. c. The sum of the magnitudes of each momentum. d. The momentum of exactly one object in the system. e. The momenta of all but one of the objects in the system.
A straight wire of length L carries a current I in the positive z direction in a region where the magnetic field is uniform and specified by Bx = 3B, By = -2B, and Bz = B, where B is a constant. What is the magnitude of the magnetic force on the wire?
a. 3.2 ILB b. 5.0 ILB c. 4.2 ILB d. 3.6 ILB e. 1.0 ILB
As the speed of an object increases, its relativistic momentum:
a. stays the same as its classical momentum. b. increases more than its classical momentum. c. increases less than it classical momentum. d. does not change since momentum is a conserved quantity.
The nuclei of He are also known as
A) ? particles. B) ? particles. C) ? rays. D) x-rays. E) positrons.