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# Karalyn

Questions5
• ### Distance and frequency physics problem?

Two small speakers A and B are driven in step at 745 Hz by the same audio oscillator. These speakers both start out 4.50 m from the listener, but speaker A is slowly moved away. (See the figure (Figure 1)). The speed of sound in air is 344 m/s.

At what distance d will the sound from the speakers first produce destructive interference at the location of the listener?

If A keeps moving, at what distance d will the speakers next produce destructive interference at the listener?

After A starts moving away, at what distance will the speakers first produce constructive interference at the listener?

Physics9 months ago
• ### Length of pipe open at one end physics help?

The fundamental frequency of a pipe that is open at both ends is 592 Hz. Use v=344m/s.

If one end is now closed, find the wavelength of the new fundamental.

I already found that the length of the whole pipe is 0.2905 m.

• ### frequency/distance physics problem?

The portion of string between the bridge and upper end of the fingerboard (the part of the string that is free to vibrate) of a certain musical instrument is 60.0 cm long and has a mass of 2.00 g . The string sounds an A4 note (440 Hz ) when played.Where must the player put a finger (at what distance x from the bridge) to play a D5 note (587 Hz )? (See the figure (Figure 1)) For both notes, the string vibrates in its fundamental mode.

I'm pretty certain you use f=nv/2L, but I just don't know what n is.  When I tried 1 because it said fundamental, I got the wrong answer. I used to v=lambda*f , is that not correct to find velocity?