The mass of the Moon is about 1/80th of the mass of Earth. The force exerted by Earth on the Moon is about 80 times that exerted by the Moon on Earth
Indicate whether the statement is true or false
FALSE
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In terms of thermal expansion it is important that
A) a key and its lock are made of similar or the same material. B) the fillings in your teeth expand at the same rate as teeth. C) iron rods and concrete in which they're embedded expand equally. D) all of the above E) none of the above
The order of evolutionary stages of a star like the Sun would be Main Sequence, giant, planetary nebula, and finally a ________
Fill in the blank(s) with correct word
Which of the following is true about protons and neutrons?
A) They have exactly the same mass. B) They have exactly the same charge. C) They are composed of the same number of quarks. D) They are fundamental particles that cannot be broken into smaller particles. E) They are leptons.
The conservation of momentum is most closely related to
A) Newton's 1st law. B) Newton's 2nd law. C) Newton's 3rd law. D) Newton's law of gravity