State Newton's Law of Universal Gravitation
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Every particle in the universe attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them. The force acts along the line joining the two particles.
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A 45-kg person steps on a scale in an elevator. The scale reads 460 N. What is the elevator doing?
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The core of the Milky Way, Sagittarius A, is a strong radio source in the sky
Indicate whether the statement is true or false
What is a characteristic of all terrestrial planets? a. They all have water
b. They all have a rocky surface. c. They all have a thick atmosphere. d. They all have weather patterns. e. They all have a very geologically active surface.
Describe the location of Polaris in the sky relative to the horizon as seen by observers in Alaska (lat. = 60° N), Texas (lat. = 33° N), Ecuador (lat. = 0°), and Australia (lat. = 30° S)
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