From the horizon to the observer's zenith is an angle of
A) 23.5 degrees for observers at the Tropics of Cancer and Capricorn.
B) 30 degrees for observers at a latitude of 30 degrees north.
C) 90 degrees for everyone on the Earth.
D) 66.5 degrees for everyone on the Earth.
E) 0.0 degrees for an observer at the Earth's north pole.
C
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Answer the following statement true (T) or false (F)
A charge Q is uniformly spread over one surface of a very large nonconducting square elastic sheet having sides of length d. At a point P that is 1.25 cm outside the sheet, the magnitude of the electric field due to the sheet is E
If the sheet is now stretched so that its sides have length 2d, what is the magnitude of the electric field at P? A) 4E B) 2E C) E D) E/2 E) E/4
An astronaut applies a force of 450 N to an asteroid, and it accelerates at 7.0 m/s2 . What is the asteroid's mass?
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