A satellite is in a circular orbit 600 km above the Earth's surface. The acceleration of gravity is 8.21 m/s2 at this altitude. The radius of the Earth is 6400 km. Determine the speed of the satellite, and the time to complete one orbit around the Earth.
What will be an ideal response?
7580 m/s, 5800 s
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What happens to the magnitude of the magnetic field inside a long solenoid if the current is doubled?
1.It becomes four times larger. 2.It becomes twice as large. 3.It is unchanged. 4.It becomes one-half as large. 5.It becomes one-fourth as large.
Current estimates place the age of the universe at about ________
A) 14 billion years B) 4 1/2 billion years C) 10 million years D) 10 billion years
Two things that are quantized in the Bohr model of the hydrogen atom are __________ and __________
Fill in the blank(s) with correct word
If the distance between us and a star is doubled, with everything else remaining the same, the luminosity
A) is decreased by a factor of four, and the apparent brightness is decreased by a factor of four. B) is decreased by a factor of two, and the apparent brightness is decreased by a factor of two. C) remains the same, but the apparent brightness is decreased by a factor of two. D) remains the same, but the apparent brightness is decreased by a factor of four. E) is decreased by a factor of four, but the apparent brightness remains the same.