According to the nebular theory of solar system formation, which law best explains why the solar nebula spun faster as it shrank in size?
A) the law of conservation of angular momentum
B) the law of conservation of energy
C) the law of universal gravitation
D) Einstein's law E = mc2
A) the law of conservation of angular momentum
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Many of the smallest Jovian moons are most likely
A) captured asteroids and comets B) captured objects from outside the solar system C) small clumps of gas left over from the formation of the host planet D) fragments of other moons
Lucite has an index of refraction of 1.50. What is its critical angle of incidence?
A) 1.16° B) 15° C) 41.8° D) 65.2° E) 87.4°
Which of the following statements about the cosmic background radiation is not true?
A) It has a temperature of about 3 degrees K above absolute zero. B) It appears essentially the same in all directions (it is isotropic). C) It had a much higher temperature in the past. D) It is the result of a mixture of radiation from many independent sources, such as stars and galaxies that formed within the first billion years of the Big Bang. E) It was discovered by Penzias and Wilson in the mid-1960s.
Identical 8.0-?C point charges are positioned on the x axis at x = ±1.0 m and released from rest simultaneously. What is the kinetic energy of either of the charges after it has moved 2.0 m?
a. 84 mJ b. 54 mJ c. 96 mJ d. 63 mJ e. 48 mJ