Physics with Cal
DeewI need help with these homework problems
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files (2)HomeworkPartIIWavesStudentCopy.pdf
RemainingChaptersHWPart1-StudentCopy.pdf
HomeworkPartIIWavesStudentCopy.pdf
1. The amplitude of the wave shown in the figure is
A. A.
B. B. C. C.
D. D.
2. The wavelength of the wave shown in the figure is
A. A. B. B.
C. C.
D. D.
3. What is the wavelength of a wave with a speed of 9.0 m/s and a period of 0.33 s?
A. 0.33 m
B. 1.5 m
C. 3.0 m
D. 13 m
E. 27 m
4. A wave has a frequency of 58 Hz and a speed of 31 m/s. What is the wavelength of this wave?
A. 1.9 m
B. 3.5 m
C. 0.29 m
D. 0.53 m
E. 31 m
5. A stationary railroad whistle is sounded. An echo is heard 5.0 seconds later by the train's engineer. If the
speed of sound is 343 m/s, how far away is the reflecting surface?
A. 68 m
B. 140 m
C. 860 m
D. 1700 m
E. 2000 m
6. Ocean waves with a period is 10 s are found to have a wavelength of 120 m. Their speed is
A. 0.083 m/s.
B. 12 m/s.
C. 120 m/s.
D. 1200 m/s.
E. None of the above is correct
7. The musical note A has a frequency of 440 Hz and its wavelength in seawater is 3.5 m. The speed of sound in
seawater is
A. 80 m/s.
B. 126 m/s.
C. 1540 m/s.
D. 3 108 m/s.
E. 343 m/s
8. Radio amateurs are permitted to communicate on the "10-meter band". What frequency of radio waves
corresponds to a wavelength of 10 meters?
A. 3.3 10-8 Hz
B. 3.0 107 Hz
C. 3.3 107 Hz
D. 3.0 109 Hz
E. 3.0 106 Hz
RemainingChaptersHWPart1-StudentCopy.pdf
Multiple Choice Questions
1. Which of the following formulas relating temperatures on the Celsius and Fahrenheit scales is correct?
A. Tc = (5/9)(TF - 32)
B. Tc = (5/9)(TF + 32)
C. Tc = (9/5)(TF - 32)
D. Tc = (9/5)(TF + 32)
2. Of the substances below, the one with the highest specific heat is
A. water.
B. ice.
C. concrete.
D. gold.
3. Of these substances, the one with the lowest specific heat is
A. water.
B. ice. C. concrete.
D. gold.
4. The average pressure of the atmosphere at sea level corresponds to which one or more of the following?
A. 101 Pa
B. 101 kPa
C. 98 kPa
D. 15 lb/in2
E. Both B and D
5. Which of the following formulas expresses the relationship between the pressure and absolute temperature of a gas sample whose volume is fixed?
A.
B.
C.
D.
6. A temperature of 20C is the same as
A. -20.9F.
B. -6.4F.
C. 68F.
D. 94F.
7. Ethanol boils at 172F. The Celsius equivalent of this temperature is
A. 64C.
B. 78C.
C. 140C.
D. 278C.
8. At which of the following Celsius temperatures will a Fahrenheit thermometer show the same reading in degrees?
A. -40C
B. 0C
C. 32C
D. 40C
9. The density of brass is 8 103 kg/m3. The volume occupied by 320 g of brass is A. 0.040 cm3.
B. 4.0 cm3.
C. 40 cm3.
D. 400 cm3.
10. The density of air is 1.3 kg/m3. The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of
A. 0.26 kg.
B. 6.5 kg.
C. 38 kg.
D. 65 kg.
11. A 400-kg concrete block is 1 m long, 0.6 m wide, and 0.3 m high. Its density is
A. 72 kg/m3. B. 222 kg/m3.
C. 667 kg/m3.
D. 2222 kg/m3.
12. A 400-kg concrete block is 1 m long, 0.6 m wide, and 0.3 m high. It can exert three different pressures on a horizontal surface, depending on which face it rests on. The highest pressure is
A. 0.7 kPa.
B. 2.2 kPa.
C. 13.1 kPa.
D. 21.8 kPa.
13. The pressure on 100 liters of helium is decreased from 1000 kPa to 500 kPa. The new volume of the helium is
A. 25 liters.
B. 50 liters.
C. 200 liters. D. 1600 liters.
14. An absolute temperature of 100 K is the same as a Celsius temperature of
A. -173C.
B. 32C.
C. 212C.
D. 373C.
15. Heat is supplied to a sample of a monatomic ideal gas at 40 °C. It is observed that the gas expands until
its volume and pressure are doubled. What is the final temperature of the gas?
A) 10 °C
B) 20 °C
C) 80 °C
D) 980 °C
E) 1600 °C
16. An ideal gas is contained in a vessel with a moveable piston. Initially, the gas has a volume of 0.024 m3,
an absolute pressure of 1.8 atm, and a temperature of 35.0 °C. The pressure is 0.90 atm when the volume of
the container is decreased to 0.012 m3. What is the final temperature of the gas?
A) 77 K
B) 85 K
C) 170 K
D) 154 K
E) 282 K
