Question

Question 6 (1 point)

Which of the following is a longitudinal wave?

Question 6 options:

	none of these
	wave in a guitar string
	electromagnetic wave
	sound wave in a gas
	all of these

sub section

Question 7 (1 point)

On a day when the speed of sound in air is 340 m/s, what will be the wavelength of sound of frequency 510 Hz?

Question 7 options:

	0.67 m
	1.5 m
	0.33 m
	3.0 m
	510 m

sub section

Question 8 (1 point)

The speed of electromagnetic waves in air is 3.0 x 10⁸ m/s. What is the wavelength of FM radio waves having a frequency of 1.0 x 10⁸ Hz?

Question 8 options:

	6.0 m
	0.333 m
	1.0 m
	10 m
	3.0 m

sub section

Question 9 (1 point)

The Doppler effect refers to changes in a sound wave's

Question 9 options:

	speed.
	amplitude.
	frequency.
	duration.

sub section

Question 10 (1 point)

A fast train approaches a car waiting at a grade crossing and sounds its horn. A person in the car will notice that, compared to what it would be if the train were at rest, the

Question 10 options:

	frequency appears to be higher.
	frequency appears to be lower.
	wavelength appears to be the same.
	wavelength appears to be longer.

Answer 1

Ans 6 - sound wave in a gas

Ans 7- 0.67m

Ans 8- 3.0 m

Ans 9- frequency

Ans 10- frequency appears to be higher

heameny 1 240 510 x 40 (Ans) 510 Ans 8 - n7 3 x 1 1-0x 10 ? 22 (Ans

Please give a positive rating by clicking on the thumbs up ? button if you get benefited from this answer? have a good day ahead. Thank you?