What extrasolar planet discoveries were initially surprising?
A) Jupiter-like planets orbiting very close to their stars
B) planets with large eccentricities
C) systems with only one planet
D) A and B
E) A and C
F) B and C
D
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If the headlights on a car are separated by 1.3 m, how far down the road can they be resolved if the angular resolution of the eye is 5.0 × 10-4 rad and the person has excellent vision?
A) 1.3 km B) 5.0 km C) 4.8 km D) 0.65 km E) 2.6 km
If the voltage on a capacitor is doubled, then the energy stored by the capacitor
A) quadruples. B) doubles. C) halves. D) stays the same. E) triples.
The electric field strength in the space between two closely spaced parallel disks is 1.0 × 105 N/C. This field is the result of transferring 3.9 × 109 electrons from one disk to the other
What is the diameter of the disks? (e = 1.60 × 10-19 C, ?0 = 8.85 × 10-12 C2/N ? m2) A) 3.0 cm B) 1.5 cm C) 4.5 cm D) 6.0 cm
Graphical Analysis: A child standing on a bridge throws a rock straight down. The rock leaves the child's hand at time t = 0 s. If we take upward as the positive direction, which of the graphs shown below best represents the acceleration of the stone as a function of time?
A. A B. B C. C D. D E. E