You are experimentally determining the critical angle for a novel transparent solid whose index of refraction is less than that of water (n=1.33) but greater than that of air (n=1.00). Your experimental method involves work underwater in which you observe whether there is any transmitted ray at the water/solid interface as you vary the angle of incidence on the solid surface. When your device reaches an incident angle of 53 degrees you find that the transmitted ray vanishes. What is the index of refraction for this new solid?
A. 1.16
B. 0.57
C. 1.06
D. 0.53
C. 1.06
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Consider two copper wires. One has twice the length of the other. How do the resistivities of these two wires compare?
A) The longer wire has twice the resistivity of the shorter wire. B) Both wires have the same resistivity. C) The longer wire has four times the resistivity of the shorter wire. D) The shorter wire has twice the resistivity of the longer wire.
A factory siren indicating the end of a shift has a frequency of 80 Hz where the speed of sound in air is 343 m/s
What frequency is perceived by the occupant of a car that is traveling at 30 m/s (a) towards the factory and (b) away from the factory?
An object of radius R and moment of inertia I rolls down an incline of height H after starting from rest. Its total kinetic energy at the bottom of the incline:
a. is gR/I. b. is I/gH. c. is 0.5 Ig/H. d. cannot be found from the given information alone.
If we photograph a person's face using dim light and an extremely short exposure time, the film will reveal
A) a spread out but very fuzzy image of the face. B) a very dim image of the face. C) only a few separated tiny spots that don't much resemble the face. D) only a few separated interference lines. E) only a single tiny spot right at the center.