Two identical silver spheres of mass m and radius r are placed a distance R (sphere 1) and 2R (sphere 2) from the Sun, respectively. The ratio of the pressure of solar radiation on sphere 2 to that on sphere 1 is
A. 0.25.
B. 0.50.
C. 1.0.
D. 2.0.
E. 4.0.
Answer: A
You might also like to view...
The term observable universe refers to
A) that portion of the universe that we have so far photographed through telescopes. B) the portion of the universe that can be seen by the naked eye. C) the portion of the universe that is not hidden from view by, for example, being below the horizon. D) that portion of the universe that we can see in principle, given the current age of the universe.
Two waves are described by y1 = 6 cos 180t and y2 = 6 cos 186t, (both in meters). What effective frequency does the resultant vibration have at a point?
a. 92 Hz b. 183 Hz c. 6 Hz d. 3 Hz e. 366 Hz
What is the reason Mercury has so little gas in its atmosphere?
a. Its mass is small. b. It has a high temperature. c. It is close to the Sun. d. Its escape velocity is low. e. all of the above
Who started launching liquid-filled rockets in the United States in 1926?
A) Robert Goddard B) Konstantin Tsiolkovsky C) Hermann Oberth D) Wernher von Braun