For very small objects at very low speeds, the drag force is directly proportional to the magnitude of the velocity. The proportionality constant depends on
A)
the viscosity of the fluid.
B)
the size of the object.
C)
the shape of the object.
D)
all of the above choices.
E)
none of the above choices.
D
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General Questions: If you pound a feather with a hammer, which one feels a greater force?
A. always the feather B. always the hammer C. The size of the force is always exactly the same on both of them. D. If the feather moves, then it felt the greater force. Otherwise the force was the same on both.
What do astronomers mean when they say the universe is expanding?
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Diamond is a diamagnetic material
Indicate whether the statement is true or false