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Unformatted text preview: Physics 1C
Quiz # 2 Oct. 17, 2003
Prof. Jose Onuchic MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. . Situation A
A wire, 30 m long,_with a mass of 20 g, is under tension. A transverse wave is propagated on the wire, for which the
frequency is 140 Hz, the wavelength is 0.40 m, and the amplitude is 3.5 mm.
1) In Situation A, the time, for a crest of the transverse wave to travel the length of the wire, in ms, is closest
A) 72 B) 54 C) 48 . D) 60 E) 66 2) In Situation A, the tension in the line, in SI units, is closest to:
A) 21 - B) 24 C) 27 D) 33 E) 30 3) Waves propagate at 8.0 m/ 5 along a stretched string. The end of the string is vibrated up and down once
every 1.5 5. What is the wavelength of the waves that travel along the string? A) 3.0 In _ B) 12.0 m ' C) 6.0 In D) 5.3 In E) 6.6 m 4) Bats can detect small objects such as insects that are of a size approximately that of one wavelength. If bats
emit a chirp at a frequency of 60 kHz, and the speed of sound waves in air is 330 In / 5, what is the smallest
size insect they can detect? A) 1.5 mm B) 3.5 mm C) 4.0 mm D) 7.5 m E) 5.5 mm
5) A 2.0m long plano strlng of mass 10 g 15 under a tension of 338 N Flnd the velocrty wrth Wthh a wave
travels on this string. .
A) 130 m/S B) 260 m/S - C) 520 m/s' D) 1040m/S E) 2080 m/S 6) A wave is traveling in a string at 60 In / 5. When the tension is then increased 20%, what will be the
resulting wave velocity: ' A) also 60 m/s B) 66 m/s C) 72m/s D) 55 m/s E) 50 m/s 7) A wave travels in a string at 60 m / s. A second string of 20%; greater linear density has the same tension
applied as in the ﬁrst string. What will be the resulting wave velocity in the seccind string? A) also60 rn/s B) 66 rn/s C) 72m/s D) 55 m/s E) 50 m/s
8) For a wave traveling in a string, by what factor would the tension need to be increased to double the wave
velocity? I I -
A) 1.4 B) 2.0 C) 4.0 . D) 3.0 E) 16.0 9) A string is strung horizontally with a ﬁxed tension. A wave of frequency 100 Hz is sent along the string, and it has a wave velocity of 50.0 m / s. Then a second wave, one of frequency 200 Hz, is sent along the
string. What is the wave velocity of the second wave? A) 70.7 m/s B)25.0m/s C) 200 m/s D) 100 m/s E) 50.0 m/s 10) TraﬁeverSe waves travel with a speed of 200 m / 3 along a taut copper wire that has a diameter of 1.50 mm.
' What is' the tension in the wire? (The density of copper is 8.9-3 g/ c1113.)
A) 1 890 N B) 1 260 N C) 631 N D) 473 N _ E) 315 N A--2 ...
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This note was uploaded on 08/27/2009 for the course PHYS 1 taught by Professor Onuich during the Winter '07 term at CSU Northridge.
- Winter '07
- Waves And Optics