The region around 2b has far fewer craters than the region around 2c) The crater floor at 2a is also flat and smooth, without many smaller craters on it. Why are regions 2a and 2b so smooth?
A) Few small craters ever formed in these regions.
B) Erosion erased craters that once existed in these regions.
C) Lava flows covered craters that once existed in these regions.
C) Lava flows covered craters that once existed in these regions.
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You do 174 J of work while pulling your sister back on a swing, whose chain is 5.10 m long
You start with the swing hanging vertically and pull it until the chain makes an angle of 32.0° with the vertical with your sister is at rest. What is your sister's mass, assuming negligible friction? A) 22.9 kg B) 19.5 kg C) 26.3 kg D) 28.4 kg
The Miller-Urey experiment relied on special conditions found only on Earth
Indicate whether the statement is true or false
Why did Galileo's observations of moons orbiting Jupiter disagree with geocentric model of the universe of his time?
a. The moons moved in non-circular orbits about Jupiter. b. The moons did not appear to orbit the Sun. c. The moons did not appear to orbit the Earth. d. The moons appeared to be too small, and therefore too far away, to be considered part of the solar system.
Rotational Kinetic Energy: Suppose a solid uniform 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.