Question

Question 35 (1 point)

A sound wave has a length of 0.66 meters. If the frequency of the wave is 512 Hz (high C), what is the wave velocity?

Question 35 options:

	511 m/sec
	776 m/s
	0.00129 m/s
	338 m/s

Question 36 (1 point)

A standing wave on a string has a velocity of 42 m/s and a period of 0.01 s. What is the frequency of the wave?

Question 36 options:

	10 sec
	0.42 Hz
	100 Hz
	260 Hz

View hint for Question 36
There is a distractor number that you don't need in the question.

Question 37 (1 point)

The highest frequency of a radio station is 107.9 Mega Hertz. What is the wavelength?

Question 37 options:

	2.2 m
	28 m
	2780000 m
	2.8 m

View hint for Question 37
Hint, don't forget the speed of radio is the same as the speed of light.

Question 38 (1 point)

The frequency of a C note of sound is around 240 Hz. If the speed of sound in air is 345 m/s, what is the wavelength of the sound wave, in meters?

Answer to 3 sig figs.

Your Answer:Question 38 options:

Answer

Question 39 (1 point)

The frequency of a radio wave is 100.1 x 10⁷ Hz. What is the wavelength of the wave, in meters?

Answer to 3 sig figs.

Your Answer:Question 39 options:

Answer

Answer 1

Time period - 35 L = 0.66m, f = 512 HZ use v= fx = 512 HZ XO 66m Iv=338m/s An (36. Ginen, V = 42 mis and T = o.ols freavency (f) = Time period f = o vols = [100 HZ Jane & f = 107.9 MHZ ? we v = fx and v=c(speed of light) x= 3x108mis &= 316 7.9 x 106 HZ x = 208 m 1 83) f = 240HZ V = 345 ms * š sa - 1-438 mlang 39 f = 100-1X107 Hz , Xan 100 1X107 H2 = 10.298m) 107.9 x 106 Hz 3 X 108mis 0. 298 m Ang