Before it arrived in orbit about Jupiter, the Galileo spacecraft flew past
A) Mars.
B) Comet Halley.
C) the asteroid Ceres.
D) the asteroid Gaspra.
E) Saturn.
D
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Two ice skaters are at rest and facing each other. One skater weighs 140 lbs and the other skater weighs 180 lbs. The skaters "push off" of each other. The 140 lb skater is moving at 5.00 m/s to the EAST. What is the velocity of the 180 lb skater?
A. 6.50 m/s EAST B. 6.50 m/s WEST C. 3.89 m/s EAST D. 3.89 m/s WEST E. 1.55 m/s EAST
The period-luminosity law of pulsating variable stars indicates that
A. the period of pulsation is independent of luminosity. B. the more slowly a star pulsates, the more luminous it is. C. the faster a star pulsates, the more luminous it is. D. None of these choices is correct.
The carbon in our bodies was formed in nuclear reactions in long-dead stars. How much energy was released when the right number of 4He nuclei combined to make 12C?
The mass of 4He is 3728.40 MeV/c2 and the mass of 12C is 11,177.93 MeV/c2. A) 7.27 MeV B) 372 MeV C) 8.42 MeV D) 2.11 MeV
For absorption spectra to exist
A) the light source must be a gas. B) partially absorbent material must exist between the light source and the spectroscope slit. C) the spectroscope must be equipped with an absorption cell. D) all of the above E) none of the above