Atoms heavier than helium were at one time manufactured by
A) photosynthesis.
B) thermonuclear fusion.
C) radiant energy conversion.
D) radioactivity.
E) none of the above
Answer: B
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The mass range for neutron stars is:
A) .08 to .4 solar masses. B) .4 to 3 solar masses. C) 1.4 to 3 solar masses. D) 3 to 8 solar masses. E) 6 to 11 solar masses.
The density of aluminum is 2700 kg/m3. An aluminum block has a mass of 2.5 kg. The buoyant force exerted on this block when it is completely submerged in water of density 1000 kg/m3 is approximately
A. 0.0091 N. B. 24.5 N. C. 2.5 N. D. 0.93 N. E. 9.1 N.
At the time of the winter solstice (the start of winter), the Sun is
a. farthest south of the celestial equator. b. farthest north of the celestial equator. c. on the celestial equator moving north. d. on the celestial equator moving south.
The density of water is 1.00 grams/cm3. What is the density in kg/m3?
A) 1.00 × 10-3 B) 1.00 C) 1.00 × 103 D) 1.00 × 106 E) 0.000100