Momentum is defined as
A) mass multiplied by velocity.
B) mass multiplied by speed.
C) force multiplied by velocity.
D) mass multiplied by acceleration.
A) mass multiplied by velocity.
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Bulk Modulus: Which one of the following would be expected to have the smallest bulk modulus?
A. liquid mercury B. liquid water C. helium vapor D. solid iron E. solid uranium
Although most astronomers assume dark matter really exists, there is at least one other possible explanation for the phenomena attributed to dark matter. What is it?
A) There could be something wrong or incomplete with our understanding of how gravity operates on galaxy-size scales. B) The so-called dark matter is really just ordinary stars that are enshrouded in clouds of dust. C) We could just be having a hard time understanding the observations, because they involve very distant galaxies. D) There could be something wrong with our understanding of how atoms produce light.
A proton (+1.6 × 10^-19 C) moves 10 cm along the direction of an electric field of strength 4.0 N/C. The electrical potential difference between the proton's initial and ending points is:
a. 4.8 × 10^-19 V. c. 0.044 V. b. 0.40 V. d. 6.4 × 10^-19 V.
According to the uncertainty principle, halving the uncertainty in position is accompanied by __________ the minimum uncertainty in momentum.
A. halving B. quartering C. doubling D. quadrupling E. no change in