When did humans learn that the Earth is not the center of the universe?
A) within the past 500 years
B) about 2,500 years ago
C) about 1,000 years ago
D) We haven't; there is still considerable scientific debate about whether Earth is the center of the universe.
A
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Suppose a solid sphere of mass M and radius R rolls without slipping down an inclined plane starting from rest. The angular velocity of the sphere at the bottom of the incline depends on
A) the mass of the sphere. B) the radius of the sphere. C) both the mass and the radius of the sphere. D) neither the mass nor the radius of the sphere.
You are standing on a skateboard, initially at rest. A friend throws a very heavy ball towards you
You have two choices about what to do with the ball: either catch the ball or deflect it back toward your friend with the same speed as it was originally thrown. Which choice should you make in order to maximize your speed on the skateboard? A) Deflect the ball back. B) Catch the ball. C) Your final speed on the skateboard will be the same regardless whether you catch the ball or deflect the ball.
A piece of iron and a cup of water both at room temperature are heated such that the thermal energy of each doubles. Which has the higher temperature?
A) the water, because of its higher specific heat capacity B) the iron, because it doesn't change phase C) both the same D) none of the above
In the Southern Hemisphere, the Coriolis force causes all free-moving objects in the air to curve
A) to the left of their intended path. B) to the right of their intended path. C) counterclockwise to their intended path. D) clockwise to their intended path.