Question

Hey there! i need help with a few questions from my Physics B class. Thank you <3

1.

2.5+y 1.5 -2.5-a-1.5 A-0.5 /l) 0.5瓜1.5 ,2 2.5x -0 2.5

The graph illustrates a standing wave along a string that spans x = -2 to x = 2. The string is held stationary at both ends. Which harmonic is shown?

	fourth
	second
	first
	third

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2.

The graph illustrates one moment in the propagation of a transverse wave down a rope. What is the wavelength of the wave?

	12 cm
	8 cm
	4 cm
	3 cm

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3.

Sound travels at a speed of 344 m/s through air at 20°C. What is the second harmonic of an open pipe of length 1.40 m filled with air at 20°C?

	246 Hz
	377 Hz
	492 Hz
	123 Hz

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4.

In the graph, each sinusoidal curve shows the shape of a vibrating string at a different moment. At which values of x does an antinode occur? (Let k = an integer from -2 to +2.)

	0.5k
	1.5k
	k + 0.5
	k

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5. A standing wave of the fifth harmonic is induced in a stopped pipe of length 1.5 m The speed of sound through the air of the pipe is 340 m/s What is the frequency of the sound produced by the pipe?

	430 Hz
	500 Hz
	280 Hz
	350 Hz
	210 Hz

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6. A string of length 0.67 m and mass 2.0 g is held at both ends under tension. The string produces a 700 Hz tone when it vibrates in the fourth harmonic. During this event, what is the wavelength of the standing wave in the string?

	0.45 m
	0.61 m
	0.55 m
	0.49 m
	0.34 m

Answer 1