In a double slit experiment, the intensity of light at the center of the central bright fringe is measured to be 6.2 µW/m2
What is the intensity halfway between the center of this fringe and the first dark band, assuming that the small-angle approximation is valid? A) 6.2 µW/m2
B) 3.1 µW/m2
C) 4.7 µW/m2
D) 1.6 µW/m2
E) 0.12 µW/m2
B
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Water (density = 1.00 × 10^3 kg/m3) flows at 15.0 m/s through a pipe with radius 0.0400 m. The pipe goes up to the second floor of the building, 2.50 m higher, and the pressure remains unchanged. What is the speed of the water flow in the pipe on the second floor?
a. 13.3 m/s b. 16.6 m/s c. 176 m/s d. 14.2 m/s e. 6.63 m/s
A ray of light strikes a boundary between two transparent materials, and there is no transmitted ray, as shown in the figure. What can you conclude about the indices of refraction of these two materials?
A) n1 ? n2 B) n1 > n2 C) n1 = n2 D) n2 ? n1 E) n2 > n1
Two masses collide and stick together. Before the collision one of the masses was at rest. Is there a situation in which the kinetic energy is conserved in such a collision?
a. Yes, if the less massive particle is the one initially at rest. b. Yes, if the more massive particle is the one initially at rest. c. Yes, if the two particles have the same mass. d. No, kinetic energy is always lost is such a collision.
The unit of work, joule, is dimensionally the same as:
a. newton/second. b. newton/kilogram. c. newton-second. d. newton-meter.