What is meant by tidal locking?
What will be an ideal response?
The gravitational force of the Earth on the Moon has slowed the Moon's rotation so that it rotates (spins) once during every orbit. One side always faces the Earth.
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A container is filled with water and the pressure at the container bottom is P. If the container is instead filled with oil having specific gravity 0.80, what new bottom pressure results?
a. a pressure < P b. the same pressure P c. a pressure > P d. This is unable to be determined with the information given.
A mirror has a hole cut in it so that a light can shine through. Opposite the mirror is another mirror, which is parallel to the first. The light ray hits the second mirror with angle ?1, is reflected at an angle ?2 , and then is incident on the first mirror at angle ?3. At what angle to the normal, ?3, in terms of ?1, will the reflected ray then impact the first mirror?
1. ?/2 – ?1 2. ?1 3. ?/2 + ?1 4. –?1
How can the location and the strength of an earthquake be determined?
What will be an ideal response?
The Milky Way galaxy is about
A) 4 light years in diameter. B) 40 light years in diameter. C) 100 light years in diameter. D) 100,000 light years in diameter.