It is possible for a medium-mass star to collapse and form a white dwarf, but no planetary nebula
a. True
b. False
Indicate whether the statement is true or false
True
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How much electromagnetic energy is contained in each cubic meter near the Earth's surface if the intensity of sunlight under clear skies is 1000 W/m2?
A. 3.3 × 10?6 J B. 3.3 J C. 0.003 J D. 10?4 J E. 3.0 × 105 J
Some galaxies in the Local Group stopped forming stars for several billion years but then started again
Indicate whether the statement is true or false
The bright and dark bands you see in a photograph of a double slit interference pattern represent
a. the respective positions of the crests and the troughs of the light wave. b. an interference pattern that is not present unless it is produced by the camera lens. c. the respective positions of constructive and destructive interference of light from the two sources. d. the respective positions of destructive and constructive interference of light from the two sources. e. the respective positions of bright and dark particles of light.
What two quantities did Edwin Hubble compare for a sample of galaxies to discover the expansion of the universe?
A) velocity and distance B) luminosity and distance C) velocity and temperature D) luminosity and temperature E) age and distance