Your pet hamster sits on a record player that has constant angular speed. If the hamster moves to a point twice as far from the center, then its linear speed
A) doubles.
B) halves.
C) remains the same.
Answer: A
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Your weight as measured on your bathroom scale is
A) equal to your mass. B) the force due to gravity on you. C) a property of mechanical equilibrium. D) all of the above
A rock of mass m is dropped to the ground from a height h. A second rock, with mass 3m, is dropped from the same height. When the second rock strikes the ground, its kinetic energy is
1.the same as that of the first rock. 2.three times that of the first rock. 3.six times that of the first rock. 4.nine times that of the first rock.
The oldest carbon isotope evidence of life indicates that life on Earth arose at least
A) 4.5 billion years ago. B) 3.95 billion years ago. C) 2 billion years ago. D) 542 million years ago. E) 65 million years ago.
A cubical gaussian surface surrounds a long, straight, charged filament that passes perpendicularly through two opposite faces. No other charges are nearby. Through how many of the cube’s faces is the electric flux zero?
1.0 2.2 3.4 4.6