Homework Answers
A point of node in a wave is the point where the wave has minimum (zero) amplitude.
At this points the waves suffers either minimum or no displacement.
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-- way is the true value 120 Hz! What is the meaning of NODE in waves!...
A fluorescent light "hums" at 120 Hz. A bored grad student hums at 118.4 Hz. What...
A fluorescent light "hums" at 120 Hz. A bored grad student hums at 118.4 Hz. What beat frequency does he hear in his head? (Unit = Hz) (This is an autobiographical problem, by the way.)
If two successive frequencies of standing waves on a string are 225 Hz, and 2.70E2 Hz,...
If two successive frequencies of standing waves on a string are 225 Hz, and 2.70E2 Hz, what is the fundamental frequency of this string?
A tuning fork generates sound waves with a frequency of 252 Hz. The waves travel in...
A tuning fork generates sound waves with a frequency of 252 Hz. The waves travel in opposite directions along a hallway, are reflected by walls, and return. The hallway is 47.0 m long and the tuning fork is located 14.0 m from one end. What is the phase difference between the reflected waves when they meet at the tuning fork? The speed of sound in air is 343 m/s. (I got 304.9 and it says "Your response is within 10%...
Need help with these questions !! Please!! 4. It takes sound waves of frequency 500 Hz...
Need help with these questions !! Please!!
4. It takes sound waves of frequency 500 Hz 14.7 ms to make a round trip through a hollow pipe of length 7.5 m filled with helium. What is the speed of sound in helium? Show your calculations 5. The speed of sound waves in air is 343 m/sec. If the frequency of the waves is 450 Hz, what are the period and wavelength of the waves? wavelength of this sound?
For sound waves in air with frequency 1000 Hz a displacement amplitude of produces a pressure...
For sound waves in air with frequency 1000 Hz a displacement amplitude of produces a pressure amplitude of . Use = 344 . a) What is the wavelength of these waves? b) For 1000-Hz waves in air, what displacement amplitude would be needed for the pressure amplitude to be at the pain threshold, which is 30 Pa? Express your answer using two significant figures. c) For what wavelength will waves with a displacement amplitude of produce a pressure amplitude of...
A tuning fork generates sound waves with a frequency of 232 Hz. The waves travel in...
A tuning fork generates sound waves with a frequency of 232 Hz. The waves travel in opposite directions along a hallway, are reflected by walls, and return. The hallway is 42.0 m long and the tuning fork is located 14.0 m from one end. What is the phase difference between the reflected waves when they meet at the tuning fork? The speed of sound in air is 343 m/s.
Question 3 1 pts What is the meaning of the P-value provided by a one-way ANOVA?...
Question 3 1 pts What is the meaning of the P-value provided by a one-way ANOVA? How likely that a mistake is made by rejecting a true null hypothesis If you reject the null hypothesis, there is a 5% chance that you're making an incorrect decision The probability that the observed test-statistic would occur by chance if the null hypothesis is true The probability that there is a difference between the sample means Question 4 1 pts What are the...
A string of length 48 cm is held fixed at both ends such that waves travel...
A string of length 48 cm is held fixed at both ends such that waves travel along the string with a speed of 85 m/s. What must the frequency of a standing wave be for the closest node to the end of the string to be 16 cm from the end? a) 1060 Hz b) 782 Hz c) 531 Hz d) 354 Hz e) 266 Hz
- There is a 120 Volt (rms) source with a frequency of 60 Hz connected to...
- There is a 120 Volt (rms) source with a frequency of 60 Hz connected to a resistor and a 44.2 microfarads capacitor in series. For a what value resistance will give a rms current of 1.2 A?
11) Two loudspeakers, A & B are emitting waves of the same frequency (f= 1021 Hz)...
11) Two loudspeakers, A & B are emitting waves of the same frequency (f= 1021 Hz) in a room where the speed of sound is measured to be v 343 m/s. a) What is the wavelength of the sound emitted by the speakers? 4.0 m1.5 m 2.0 m If a person at point P determines that the waves from the two speakers interfere destructively (it is quiet at point P), are the waves emitted from the speakers in phase or...
A fluorescent light "hums" at 120 Hz. A bored grad student hums at 118.4 Hz. What beat frequency does he hear in his head? (Unit = Hz) (This is an autobiographical problem, by the way.)
Need help with these questions !! Please!!
4. It takes sound waves of frequency 500 Hz 14.7 ms to make a round trip through a hollow pipe of length 7.5 m filled with helium. What is the speed of sound in helium? Show your calculations 5. The speed of sound waves in air is 343 m/sec. If the frequency of the waves is 450 Hz, what are the period and wavelength of the waves? wavelength of this sound?
Question 3 1 pts What is the meaning of the P-value provided by a one-way ANOVA? How likely that a mistake is made by rejecting a true null hypothesis If you reject the null hypothesis, there is a 5% chance that you're making an incorrect decision The probability that the observed test-statistic would occur by chance if the null hypothesis is true The probability that there is a difference between the sample means Question 4 1 pts What are the...
A string of length 48 cm is held fixed at both ends such that waves travel along the string with a speed of 85 m/s. What must the frequency of a standing wave be for the closest node to the end of the string to be 16 cm from the end? a) 1060 Hz b) 782 Hz c) 531 Hz d) 354 Hz e) 266 Hz
- There is a 120 Volt (rms) source with a frequency of 60 Hz connected to a resistor and a 44.2 microfarads capacitor in series. For a what value resistance will give a rms current of 1.2 A?
11) Two loudspeakers, A & B are emitting waves of the same frequency (f= 1021 Hz) in a room where the speed of sound is measured to be v 343 m/s. a) What is the wavelength of the sound emitted by the speakers? 4.0 m1.5 m 2.0 m If a person at point P determines that the waves from the two speakers interfere destructively (it is quiet at point P), are the waves emitted from the speakers in phase or...
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