When Galileo rolled a ball down an incline and up another incline, he found that the ball rolled nearly to
A) its initial height.
B) halfway its original height.
C) three-quarters its original height.
D) higher than its original height.
Answer: A
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The surface water temperature on a large, deep lake is 3°C. A sensitive temperature probe is lowered several m into the lake. What temperature will the probe record?
A) a temperature warmer than 3°C B) a temperature less than 3°C C) a temperature equal to 3°C
The most accurate measurements known are
A) mass measurements. B) measurements of electric charge. C) spectroscopic measurements. D) made with thermometers.
A hypothetical planet has a mass of one-half that of the earth and a radius of twice that of the earth. What is the free-fall acceleration on the planet in terms of g, the free-fall acceleration at the surface of the earth?
A) g B) g/2 C) g/4 D) g/8 E) g/16
A tennis player on serve tosses a ball straight up. As the tennis ball travels through the air, its speed
1.increases. 2.decreases. 3.decreases and then increases. 4.increases and then decreases. 5.remains the same.