The lowest mass object that can initiate thermonuclear fusion of hydrogen has a mass of about
a. 1 solar masses
b. 80 solar masses
c. 8 solar masses
d. 0.08 solar masses
e. 0.001 solar masses
D
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Galileo wrote the Almagest
a. True b. False Indicate whether the statement is true or false
Suppose that the universe were infinite in both extent and age. In that case, we would expect the night sky to be
A) uniformly bright. B) much larger. C) filled with about 1,000 times as many stars. D) expanding at a more rapid rate.
A solid, uniform sphere of mass 2.0 kg and radius 1.7 m rolls from rest without slipping down an inclined plane of height 7.0 m. What is the angular velocity of the sphere at the bottom of the inclined plane?
A) 5.8 rad/s B) 9.9 rad/s C) 11 rad/s D) 7.0 rad/s
When hydrogen, from Group 1A, unites with chlorine, it forms a(n) ______________ compound
a. ionic b. metallic c. covalent d. organic