How are frequency and period related in simple harmonic motion?:
a) They are directly related
b) They are inversely related
c) Their sum is constant
d) Both measure the number of cycles per unit of time
Answer: b) They are inversely related
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Give an estimate of the number of steps in the stairway of a ten-story building.
A. 101 B. 102 C. 103 D. 104
A truck, initially at rest, rolls down a frictionless hill and attains a speed of 20 m/s at the bottom. To achieve a speed of 40 m/s at the bottom, how many times higher must the hill be?
A. half the height B. the same height C. 12 times the height D. twice the height E. four times the height
Why might a solvent like turpentine be better for removing grease and grime than water?
A) Like dissolves like. B) Oil and grease have similar interatomic forces as the turpentine and so are more soluble. C) Water is too polar and doesn't interact well with the nonpolar oils. D) Oil and grease have very limited solubility in the water. E) all of the above
The extensive glaciation of the Pleistocene caused sea level to
A) drop because a great deal of water was bound in glaciers. B) rise because a great deal of water was tied up in glaciers. C) drop because of increased ablation and reduced accumulation. D) rise because of increased accumulation and reduced ablation.