A type Sa galaxy has a larger ________ than type Sc
A) nuclear bulge
B) halo
C) mass
D) number of stars
E) spiral structure
A
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Velocity: A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, and then 1.0 km north to return to its starting point. This trip takes 45 min. What was the bear's average speed?
A. 0.00 km/h B. 0.067 km/h C. 4.0 km/h D. 5.3 km/h
Jim and Mary are carrying Bob on a horizontal stretcher. The uniform stretcher is 2.00 m long and weighs 80 N. Bob weighs 600 N. Bob's center of gravity is 80 cm from Mary. Jim and Mary are at the ends of the stretcher. The force that Jim is exerting to support the stretcher, with Bob on it, is
A. 280 N. B. 320 N. C. 380 N. D. 400 N. E. 520 N.
According to our present theory of solar system formation, which of the following lists the major ingredients of the solar nebula in order from the most abundant to the least abundant?
A) hydrogen and helium gas; rock; metal; hydrogen compounds B) hydrogen and helium gas; hydrogen compounds; rock; metal C) hydrogen, water, methane, helium D) hydrogen compounds; hydrogen and helium gas; metal; rock
A beam of light of wavelength 610 nm passes through a slit that is 1.90 µm wide. At what the angle away from the centerline does the first dark fringe occur?
A) 39.9° B) 18.7° C) 11.4° D) 12.2° E) 9.35°