Which of the following is true of the Ptolemaic model of the Universe?
A) It predicted the positions of the planets with fair accuracy at first.
B) It went against Aristotle's beliefs of the Universe.
C) It strengthened the first principles of Aristotle.
D) It placed Earth at the exact center of the Universe.
A
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What mechanism is most responsible for generating the internal heat of Io that drives the volcanic activity?
A) accretion B) radioactive decay C) differentiation D) tidal heating E) bombardment
Does Earth's gravity pull more strongly on a block of wood or on a block or iron having the same size? Neglecting air resistance, which one falls faster when dropped?
A) Gravity pulls more strongly on the iron, and both fall at the same speed. B) Gravity pulls equally strongly on both, and both fall at the same speed. C) Gravity pulls equally strongly on both, and the iron falls faster. D) Gravity pulls more strongly on the iron, and the iron falls faster. E) None of the above.
A proton moves through a magnetic field of magnitude 1.40 T with speed 5.00 ´ 106 m/s. What is the magnitude of the maximum acceleration of the proton? The mass of a proton is 1.67 ´ 10–27 kg, and its charge is 1.6 ´ 10–19 C.
a. 3.42E+14 m/s b. 6.71E+14 m/s c. 3.35E+21 m/s d. 1.71E+21 m/s
A 2C charge and a 4C charge attract each other with 10N of force. How much will a 2C charge and a 12C charge attract each other when placed the same distance apart?
a. 5N. b. 12N. c. 10N. d. 30N.