According to the doppler effect, objects moving away from earth would have a a. cooling appearance. b. blue shift. c. red shift. d. warming appearance.

The correct answer is:

redshift.

Explanation:

Redshift and blueshift describe how light shifts approaching shorter or longer wavelengths as objects in space (such as stars or galaxies) move closer or removed away from us. The knowledge is key to charting the universe's expansion. Visible light is a spectrum of colors, which is clear to anyone who has observed at a rainbow.

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explanation:

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only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.