In 400 B.C., a Greek named ______________ championed the idea that if matter were repeatedly cut into smaller divisions, eventually an indivisible particle would be reached
Fill in the blank(s) with correct word
Democritus
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Helioseismology shows that deeper layers of gas in the sun rotate at different speeds. When different parts of an object rotate at different rates it is called
a. the dynamo effect. b. lagging. c. reconnection. d. differential rotation. e. the Zeeman effect.
How would the passengers on the spaceship view our clocks?
A) Time is the same for everyone. B) Our clocks are going fast. C) Our clocks are going slow. D) Our clocks are going at the same rate as theirs. E) They can't see our clocks, but we can see theirs.
At room temperature, the coefficient of linear expansion for Pyrex glass is ____ that for ordinary glass
a. the same as b. more than c. less than d. stronger than
A cannon of mass 1500 kg fires a 10-kg shell with a velocity of 200 m/s at an angle of 30° above the horizontal. Find the recoil velocity of the cannon across the level ground
a. 1.15 m/s c. 2.41 m/s b. 0.94 m/s d. 1.94 m/s