The weak force that acts between an electron and a quark is caused by the exchange of:
a. photons.
c. gravitons.
b. W+, W–, or Z0 bosons.
d. gluons.
B
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N molecules of a monatomic gas A are mixed with the same number of molecules of a diatomic gas B in a container, and the mixture is held at a constant temperature T (which is about equal to room temperature). The molecules of gas A have mass mA, and the molecules of gas B have mass mB > mA Which gas has In each case, choose from one of the four answers below.
the greater value of 
A. The quantity is greater for gas A.
B. The quantity is greater for gas B.
C. The quantity is the same for both gases.
D. One does not know enough to compare the quantities.
The deepest depression found on the surface of Mars is the:
A) Mariannas Trench. B) Caloris basin. C) Valles Marineris rift. D) Hellas Basin of Mars. E) Mare Crisium.
The speed of light changes when it goes from ethyl alcohol (n = 1.36) to carbon tetrachloride (n = 1.46). The ratio of the speed in carbon tetrachloride to the speed in ethyl alcohol, v2/v1, is
A. 1.99. B. 1.07. C. 0.932. D. 0.511. E. 0.760.
A conducting bar of length L rotates with a constant angular speed of +2.0 rad/s about a pivot P at one end, as shown. A uniform magnetic field (magnitude = 0.20 T) is directed into the paper. If L = 0.40 m, what is the potential difference, VA ? VP?
a.
?12 mV
b.
+8.0 mV
c.
?8.0 mV
d.
+12 mV
e.
?16 mV