A few collisions and mergers could leave a galaxy with no gas and dust from which to make new stars

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True

Physics & Space Science

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Is Hubble's tuning fork diagram a real evolutionary tool? Why?

What will be an ideal response?

Physics & Space Science

A 150-kg crate is placed on an adjustable inclined plane. As one end of the incline is raised, the crate begins to move downward. If the crate slides down the plane with an acceleration of 0.20 m/s2 when the incline angle is 18°, what is the coefficient of kinetic friction between ramp and crate? (g = 9.8 m/s2)

a. 0.40 b. 0.50 c. 0.30 d. 0.20 e. 2.8

Physics & Space Science

The force of kinetic friction between two surfaces is dependent on the relative speed of the two surfaces

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Physics & Space Science

You are trying to cross a river that flows due south with a strong current. You start out in your motorboat on the west bank desiring to reach the east bank directly east from your starting point. You should head your motorboat

A) due east. B) due north. C) due south. D) in a southeasterly direction. E) in a northeasterly direction.

Physics & Space Science