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☆☆☆☆☆Forgetting to remove the telescope lens cap is not usually the problem.
The answer to this multiple choice question is "red shift" which is actually a useful phenomenon in viewing and analyzing the light from very distant stars. Light is shifted in wavelength by the movement of stars toward or more typically AWAY from the observer, or by moving through strong gravitational fields.
The distance between two objects may be distorted.
matter
The amount of water in a cup does not change.
density
Potential energy to kinetic energy
Scale
Because ice cubes are less dense than water.
The car does get cleaned.
If you were testing how well different dish soaps cleaned the dishes the control group would be dishes washed in plain water.
Potential energy to kinetic energy
pregnant females (apex)
Matter
