The earth has radius R. A satellite of mass 100 kg is in orbit at an altitude of 3R above the earth's surface. What is the force that Earth exerts on the satellite at the altitude of its orbit?
A) 61 N
B) 110 N
C) 9000 N
D) 16,000 N
A
Physics & Space Science
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The stellar parallax of many stars is too small to be measured. This is evidence that these stars
a. move in very small orbits. b. are almost in line with the Sun. c. are very distant. d. do not move.
Physics & Space Science
The energy stored in the earth's magnetic field with a strength of 0.5 × 10-4 T in a room 3.0 m by 4.0 m by 2.4 m is
A) 570 mJ. B) 29 mJ C) 10 mJ. D) 100 mJ. E) zero.
Physics & Space Science
What is the magnitude of the magnetic field at point P if a = R and b = 2R?
A.
B.
C.
D.
E.
Physics & Space Science
Which of the following is a result of Earth rotating on its axis?
A) The occurrence of day and night B) The lunar phases C) The yearly cycle D) The occurrence of solar eclipses
Physics & Space Science