Dez pours water (n = 1.333) into a container made of crown glass (n = 1.52). The light ray in glass incident on the glass-to-liquid boundary makes an angle of 30.0 with the normal. Find the angle of the corresponding refracted ray.
a. 19.2
c. 55.5
b. 34.8
d. 27.2
[Ques. 2] Iced tea is made by adding ice to 3.0 kg of hot tea, initially at 80C. How many kg of ice, initially at 0C, are required to bring the mixture to 10C? (Lf = 3.33 x 105 J/kg, cw = 4186 J/kgC)
a. 2.8 kg
c. 1.4 kg
b. 1.6 kg
d. 2.3 kg
[Ques. 3] A ray of light strikes a thick sheet of glass (n = 1.5) at an angle of 46 with the normal. Find the angle of the refracted ray within the glass with respect to the normal.
a. 25
c. 29
b. 56
d. 16
[Ques. 4] A puddle holds 150 g of water. If 0.75 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)
a. 2.7C
c. -0.27C
b. +2.7C
d. +0.27C
[Ques. 5] A liquid has an index of refraction of 1.33 . What is the speed of light through it? (c = 3.00 108 m/s)
a. 3.99 108 m/s
c. 4.46 108 m/s
b. 2.26 108 m/s
d. 2.04 108 m/s
[Ques. 6] A 0.0030-kg lead bullet is traveling at a speed of 300 m/s when it embeds in a block of ice at 0C. If all the heat generated goes into melting ice, what quantity of ice is melted? (Lf = 80 kcal/kg, the specific heat of lead = 0.03 kcal/kgC, and 1 kcal = 4186 J)
a. 1.47 10-2 kg
c. 3.2 10-3 kg
b. 4.0 10-4 kg
d. 2.6 10-4 kg
[Ques. 7] When light of one wavelength from air hits a smooth piece of glass at an angle, which of the following will not occur?
a. refraction
c. reflection
b. dispersion
d. All of these choices will occur.
[Ques. 8] Which of the following best describes a substance in which the temperature remains constant while at the same time it is experiencing an inward heat flow?
a. gas
c. solid
b. liquid
d. substance undergoing a change of state
[Ques. 9] Which of the following describes what will happen to a light ray incident on an air-to-glass boundary?
a. total transmission
b. partial reflection, partial transmission
c. partial reflection, total transmission
d. total reflection
[Ques. 10] Twenty grams of a solid at 70C is place in 100 grams of a fluid at 20C. Thermal equilibrium is reached at 30C. The specific heat of the solid:
a. is equal to that of the fluid. b. is less than that of the fluid. c. is more than that of the fluid. d. cannot be compared to that of a material in a different phase.
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