An important similarity that Newton noticed between a falling apple and the moon was that
A) the accelerations of both are toward the center of Earth.
B) the net force on both is toward the center of Earth.
C) Both of the above.
D) the velocity of both is toward the center of Earth.
E) All of the above.
C
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Consider a 4500. ohm resistor in series with a 133. mH inductor. What capacitance should be added in series so that the impedance is a minimum at 500. KHz?
A) 2.67 ?F B) 0.627 pF C) 0.762 pF D) 7.26 ?F E) 0.267 pF
A person in a boat sees a fish in the water (n = 1.33), the light rays making an angle of 40° relative to the water's surface. What is the true angle (in degrees) relative to the water's surface of the same rays when beneath the surface?
A. 40 B. 35 C. 50 D. 55 E. 61
In another solar system, a planet has a moon that is 4.0 × 105 m in diameter. Measurements reveal that this moon takes 3.0 x 105 s to make each orbit of diameter 1.8 × 108 m. What is the mass of the planet? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 3.4 × 1024 kg B) 4.8 × 1024 kg C) 1.2 × 1024 kg D) 1.7 × 1024 kg E) 2.4 × 1024 kg
Which of the following compounds contains both ionic and covalent bonds?
a. CaSO4 b. CHCl3 c. HNO3 d. C12H22O11