Question

What is the wavelength of a 34 MHz ultrasonic sound wave?

Question 29 options:

	0.270 m
	10. m
	0.00001 m
	8.8 m

View hint for Question 29

Question 30 (1 point)

If you listento radio, you know stations have numbers like 92.3.   The number refers to the frequency of the channel in megahertz, as in 92.3 MHz. What is the wavelength of the radio wave?

Question 30 options:

	3,300,000 m
	3.7 m
	0.0000037 m
	3.3 m

Question 31 (1 point)

Saved

The frequency of the A note on a piano is 220 Hz. What is the frequency of the high A note, one octave above that?

Question 31 options:

	440 Hz
	221 Hz
	230 sec
	320 Hz

Answer 1

"We have the relationship between frequency and wavelength is, a cada Given, da 24 NHL and c= 3x10 5/5 2- 34x108 42 - C - 3x10 then, X-T 24x100 = 8.8m 30 va 92.3x10 Hz Similashy, here, de 923 MHz and C=3x10mls them. R = 72 92-3 x 18 - 4 = 3.3m Giren A noke on a piano is 22012 Here one actave above thart is 44042