You can raise the temperature of an object with
a. microwaves.
b. infrared waves.
c. ultraviolet rays.
d. all of the above. e. only (a) and (b) above.
D
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Light in a transparent material (index of refraction 1.333 ) strikes the boundary with another transparent material (n = 1.010)
(a) What is the critical angle for total internal reflection? (b) By what percent does the wavelength change going from the 1st to the 2nd material?
A ball rolls over the edge of a table with a horizontal velocity v m/s. The height of the table is 1.6 m and the horizontal range of the ball from the base of the table is 20 m. What is the initial speed of the ball?
A) 9.8 m/s B) 20 m/s C) 35 m/s D) 4.9 m/s E) 70 m/s
An ideal fluid flows through a pipe made of two sections with diameters of 1.0 and 2.0 inches, respectively. The speed of the fluid flow through the 2.0-inch section will be what factor times that through the 1.0-inch section?
a. 1/4 c. 8 b. 1/2 d. 4
Parallel-Plate Capacitor: The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field between the plates during this process?
A. It increases. B. It decreases. C. It remains constant. D. It cannot be determined from the information given.