Estimate the distance (in cm) between the central bright region and the third dark fringe on a screen 5.00 m from two double slits 0.500 mm apart illuminated by 500-nm light.
A. 3.47
B. 2.15
C. 1.75
D. 1.50
E. 1.25
Answer: E
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In our study of falling objects, we noted that the total distance fallen was approximately 5 m in 1 s, 20 m in 2 s, 45 m in 3 s, and 80 m in 4 s. Which of the following best describes the pattern in this data?
A) The path followed by the motion is parabolic. B) The path followed by the motion is elliptical. C) Distance is proportional to the time. D) Distance is inversely proportional to the square of the time. E) Distance is proportional to the square of the time.
If the acceleration vector of an object is directed parallel to the velocity vector, then
A) the object is speeding up. B) the object is slowing down. C) the object is moving with a constant velocity. D) the object is turning. E) the object is at rest.
A hockey puck sliding across the ice finally comes to rest because
A) it seeks its proper and natural state. B) of friction. C) that's just the way it is.
What mass would have to be compressed to a radius of 1.0 × 10-15 m (the order of magnitude of the radius of an atomic nucleus) in order for it to become a black hole?
(G = 6.67 × 10-11 N ? m2/kg2, c = 3.0 × 108 m/s) A) 6.7 × 1011 kg B) 1.1 × 10-6 kg C) 8.3 × 1015 kg D) 2.2 × 103 kg E) 4.1 × 10-8 kg