How do the size and mass of Jupiter's core compare to the size and mass of Earth?
A) It is the same size and mass.
B) It is about 10 times larger in size and the same mass.
C) It is about the same size but is 10 times more massive.
D) It is about 10 times larger both in size and mass.
E) Jupiter doesn't have a core—it is made entirely from hydrogen and helium.
Ans: C) It is about the same size but is 10 times more massive.
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A) The magnifying power of the objective B) The diameter of the primary mirror C) The focal length of the eyepiece D) The length of the telescope tube
The type of EM wave used in aircraft radar is
a. radio waves. b. microwaves. c. x-rays. d. gamma rays.
The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. The mass of the earth is 5.97 × 1024 kg, the radius of the earth is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2. Assume a circular orbit
(a) What is the period of the International Space Station's orbit? (b) What is the speed of the International Space Station in its orbit?
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