Suppose we want a satellite to revolve around the earth 5 times a day. What should be the radius of its orbit? (The mass of the earth is 5.97 × 1024 kg, G = 6.67 × 10-11 N • m2/kg2, and you can neglect the presence of the moon.)
A) 1.44 × 107 m
B) 0.690 × 107 m
C) 7.22 × 107 m
D) 2.11 × 107 m
A
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Radiative energy is ________
A) energy from nuclear power plants B) heat energy C) energy of motion D) energy carried by light
What do we mean by gravitational time dilation?
A) It is the idea that time runs slower in places where gravity is stronger. B) It is the idea that clocks run slow for people moving at high speed past you. C) It is the idea that everyone measures time differently, depending on his or her reference frame. D) It is the idea that clocks run faster in stronger gravitational fields.
From center to surface, which of the following correctly lists the interior layers of a terrestrial world?
A) mantle, core, crust B) mantle, crust, core C) core, mantle, crust D) core, crust, lithosphere
In an electroplating process, it is desired to deposit 40.0 mg of silver on a metal part by using a current of 2.00 A
How long must the current be allowed to run to deposit this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)