The smallest high tides occur when the Moon phase is

A) first or third quarter.
B) new.
C) full.
D) waxing or waning crescent.
E) waxing or waning gibbous.


A

Physics & Space Science

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A circular space station (shaped like a big wheel) rotates to produce “artificial gravity”. The apparent weight of an astronaut standing on the inside surface of the outer wall is equal to her weight on earth. The inside surface of the outer wall of the space station is 285m from the axis of rotation. What is the period of rotation of the station?

A. 92 s B. 34 s C. 213 s D. 183 s

Physics & Space Science

Compared to the gravitational force on a 1 kg object, the gravitational force on a 2 kg object is

A) the same. B) nine times larger. C) four times larger. D) twice as large. E) None of the above.

Physics & Space Science

Why is the eclipse year shorter than 365.25 days?

What will be an ideal response?

Physics & Space Science

Weight and g: The acceleration due to gravity on Planet A is one-sixth what it is on Planet B, and the radius of the Planet A is one-fourth that of Planet B. The mass of Planet A is what fraction of the mass of Planet B?

A. 1/6 B. 1/16 C. 1/24 D. 1/96 E. 1/12

Physics & Space Science