A bullet is fired with a certain velocity at an angle ? above the horizontal at a location where g = 10.0 m/s2. The initial x- and y-components of its velocity are 86.6 m/s and 50.0 m/s respectively. What is the initial velocity of the bullet?
A) 86.6 m/s
B) 50.0 m/s
C) 36.6 m/s
D) 100 m/s
E) 136 m/s
D
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What is in the box shown below? 
A. Positive charge B. Negative charge C. Zero charge D. One cannot determine the charge’s sign from this diagram.
A gold brick measuring 0.25 ft by 0.33 ft by 1 ft is submerged in water. The weight density of gold is 1,200 pounds per cubic foot and the weight density of water is 62.4 pounds per cubic foot. (a) What is the weight of the gold brick? (b) What is the buoyant force on the gold brick? (c) What is the net force on the gold brick?
The speed of light in a vacuum is
A) 299,792,458 m/s. B) the basis for the meter. C) a defined value instead of a measured value. D) none of the above E) all of the above
The Hubble Space Telescope obtains higher-resolution images than most ground-based telescopes because it is:
A. larger. B. closer to the stars. C. above Earth's atmosphere.