A ray of light in glass strikes a water-glass interface at an angle of incidence equal to one-half the critical angle for that interface
The index of refraction for water is 1.33, and for the glass it is 1.43. What angle does the refracted ray in the water make with the normal?
A) 37°
B) 42°
C) 47°
D) 32°
E) 27°
A
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Phase changes occur with an attendant
A) convection. B) temperature decrease. C) temperature remaining constant. D) temperature increase.
A solid body from the outer solar system that arrives intact on the Earth's surface is called a(n) ________
Fill in the blank(s) with correct word
If L represents angular momentum, I represents rotational inertia, p represents linear momentum, m represents mass, and r represents a distance, which of the following can represent kinetic energy?
A. p2/2m B. L2/2I C. rpI D. all of the above E. both (a) and (b)
An L-shaped metal machine part is made of two equal-length segments that are perpendicular to each other and carry a 4.50-A current as shown in the figure
This part has a total mass of 3.80 kg and a total length of 3.00 m, and it is in an external 1.20-T magnetic field that is oriented perpendicular to the plane of the part, as shown. What is the magnitude of the NET magnetic force that the field exerts on the part? A) 8.10 N B) 11.5 N C) 16.2 N D) 22.9 N E) 32.4 N