The gravitational force between which two objects would be the most difficult to notice?

A.

a water particle and an air particle

B. the Moon and a water particle

C. the Moon and the Earth

D. the Earth and the Sun

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Counting your pulse can be most accurately performed by applying light pressure to an artery that is close to the surface of the skin. True or false?

How to tell if something is an electrolyte

Is this argument valid or invalid? Why? What did you consider when determining whether this argument uses proper reasoning? If students earn college degrees, they tend to make more money. Chris earned a college degree.

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