Earth's radius is about ______________ mi
Fill in the blank(s) with correct word
4000
Physics & Space Science
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Modern observations have shown that the geometry of the Universe is ____
a. flat, and the Universe must be infinite b. flat, and the Universe must not be infinite c. open, and the Universe must be infinite d. closed, and the Universe must be infinite e. closed, and the Universe must not be infinite
Physics & Space Science
When you flick a card from beneath a coin that hardly moves, you're illustrating
A) inertia. B) equilibrium. C) support force. D) friction.
Physics & Space Science
Which body has the greatest gravitational pull on Earth?
A) the Sun B) the Moon C) Mars D) Jupiter E) None has an impact, as all are too distant.
Physics & Space Science
Nix and Hydra are moons of ______________
a. Earth b. Venus c. Neptune d. Mars e. Pluto
Physics & Space Science