Who was the first to determine the electron's charge?
a. Franklin
b. Coulomb
c. Millikan
d. Faraday
c
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According to current models of solar system formation, why did Uranus and Neptune end up to be much less massive than Jupiter and Saturn?
A) Particles in the solar nebula were more spread out at greater distances, so that accretion took longer and there was less time to pull in gas before the solar wind cleared the nebula. B) Ices were able to condense at the distance of Jupiter and Saturn, but only rock and metal could condense at the distances of Uranus and Neptune. C) The solar nebula had different chemical composition at different distances from the Sun, leading to the differences in mass. D) The size differences are thought to be a random coincidence.
A wood block is placed on top of the ice in a large bowl half full of ice. The bowl is then filled to the brim with water, with the wood block riding on top of the ice. As the ice melts,
A. the density of the water decreases. B. the water level falls below the rim. C. the water level rises and water spills out of the bowl. D. the water level does not change. E. the wood block descends, causing water to spill out of the bowl.
As you go from a point where a gravitational field is strong to a point where the gravitational field gets weaker, the gravitational field lines get farther apart
a. True b. False Indicate whether the statement is true or false
If a material cannot transfer charge along its length, the material is:
a. a metal. b. a conductor. c. an insulator. d. self-contained. e. a magnet.