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Unformatted text preview: Physics 53 Quiz #1 la lFall 2007 Name Recit. Section Circle the correct answer: 1. [3 points] When the same key is played on two different pianos, which
stand next to each other, a beat is heard every 2.00 seconds. If one piano
is tuned to the note E (330 Hz), by how much is the other piano detuned? 1;) 0.25 Hz. c) 1.00 Hz.
0.50 Hz. 61) 2.00 Hz. 2. [3 points] The second harmonic of a pipe open at both ends (pipe 1) has
the same frequency as the fundamental of a pipe with one open and one closed end (pipe 2). What is the ratio of their lengths? “"gi’@ L] : 4143W LﬂA C) 2L1: L2.
13) L1 = 2L2. M g d) 4L1: L3.
m Lﬁ‘il DJ [4 points] Two loudspeakers emitting sound of the same frequency (440
Hz) and equal amplimde, but 180O out of phase, face each other. For what
minimum separation of the two speakers will there be some point on the
line connecting them at which complete constructive interference occurs? a) 0 cm. x ,
b) 19.5 cm. t? “Wm alt” ‘wéff’mwm
I
[email protected] 39.0 cm. L” i (L’°K) ﬁx 3%?1 d) 78.0 cm. 24
L %i 1..., a éWer a A _L
a. Physics 53 Quiz #1 lb Fall 2007 Name Recit. Section Circle the correct answer: 1. [3 points] When the same key is played on two different pianos, which
stand next to each other, a beat is heard every second. If one piano is
tuned to the note C (262 Hz), by how much is the other piano detuned? a) 0.25 Hz. 1.00 Hz.
b), 0.50 Hz. a) 2.00 Hz. 2. [3 points] The third harmonic of a pipe Open at both ends (pipe 1) has the
same frequency as the fundamental of a pipe with one Open and one
closed end (pipe 2). What is the ratio of their lengths? a) L] : 2L2.
b) L] = 3L2 3. [4 points] Two loudspeakers emitting sound of the same frequency (262
Hz) and equal amplitude, but 180° out of phase, face each other. For what
minimum separation of the two speakers will there be some point on the
line connecting them at which complete constructive interference occurs? a) 0 cm.
b) 32.7 cm. 65.5 cm. L“
d) 78.0 cm. ' ...
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 Fall '07
 Mueller
 Physics

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