Which of the following best describes the status of the Milky Way in our Local Group of galaxies?
A) It is one of the two largest galaxies in the group.
B) It is one of about a dozen large spiral galaxies in the group.
C) It is by far the largest galaxy in the group.
D) It is quite average among the galaxies in the group.
A
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Parallel Wires: Two long parallel wires are placed side-by-side on a horizontal table. If the wires carry current in the same direction,
A. one wire is lifted slightly while the other wire is forced downward against the table's surface. B. both wires are lifted slightly. C. the wires pull toward each other. D. the wires push away from each other.
Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a frictionless horizontal surface. The horizontal surface has a coefficient of kinetic friction of 0.2. The vertically hanging mass is 4.00 kg and the mass on the horizontal surface is 6.00 kg. The acceleration of the 4.00 kg mass is
A. 1.98 
B. 2.74
C. 4.88
D. 6.73
E. 7.84
The Sun is a fairly normal star
Indicate whether the statement is true or false
A thin converging lens is found to form an image of a distant building 24 cm from the lens. If an object is placed 16 cm from the lens, how far from the object will the image be?
A) 64 cm B) 72 cm C) 32 cm D) 96 cm E) 48 cm