The person who first explained the photoelectric effect was __________
Fill in the blank(s) with correct word
Albert Einstein
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Velocity Addition: You are moving at a speed 2/3 c toward Randy when shines a light toward you. At what speed do you see the light approaching you?
A. 1/3 c B. 2/3 c C. 4/3 c D. c
Suppose that the speed of an electron traveling 2000 m/s is known to an accuracy of 1 part in 105 (i.e., within 0.001%). What is the greatest possible accuracy within which we can determine the position of this electron?
A) 2.9 mm B) 5.8 mm C) 8.7 mm D) 1.2 cm E) 1.6 cm
A cubic box with sides of 20 cm contains 2 × 1023 molecules of helium with a root-mean-square (rms) speed of 200 m/s
The mass of a helium molecule is 3.4 × 10-27 kg. What is the average pressure exerted by the molecules on the walls of the container? A) 3.39 kPa B) 1.13 kPa C) 570 Pa D) 2.26 kPa E) 9.1 Pa
The Doppler shift for electromagnetic radiation from distant galaxies moving toward the observer is called a:
a. vacuum shift. c. red shift. b. blue shift. d. black shift.