A bowling ball and a baseball accelerate equally when falling in a vacuum because
A) their velocities are the same.
B) the ratio of their weights to mass is the same.
C) the force of gravity is the same for each in a vacuum.
D) the force of gravity does not act in a vacuum.
E) none of the above
Answer: B
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We can determine the surface temperature of a star from
a. studying its continuous spectrum. b. studying its line absorption spectrum. c. measuring the star's luminosity. d. studying its continuous spectrum and measuring the star's luminosity. e. studying its continuous spectrum, studying its line absorption spectrum, and measuring the star's luminosity.
The discussion of the "launched apple" and the Moon shows that the
A. velocities of the apple and Moon are constant. B. motion of the Moon and apple can be explained by the same laws. C. apple and the Moon have the same acceleration. D. apple and the Moon experience the same-sized force.
While Saturn is almost as large as Jupiter, its mass is only about ________ of Jupiter's
Fill in the blank(s) with correct word
3.0 moles of an ideal gas with a molar heat capacity at constant volume of 4.9 cal/(mol?K) and a molar heat capacity at constant pressure of 6.9 cal/(mol?K) starts at 300 K and is heated at constant pressure to 320 K,
then cooled at constant volume to its original temperature. How much heat flows into the gas during this two-step process? A) -720 cal B) 120 cal C) 0.00 cal D) 710 cal E) -120 cal