Question

Question 1 (1 point)

Electromagnetic waves are generally

Question 1 options:

	transverse waves
	standing waves.
	longitudinal waves.
	50/50 combination of transverse and longitudinal waves.

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Question 2 (1 point)

The period of a sound wave is the

Question 2 options:

	decade in which it is produced.
	None of these.
	inverse of its frequency.
	end of the wave.

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Question 3 (1 point)

If the speed of sound is 1100 feet per second and a tuning fork oscillates at 440 cycles per second, what is the wavelength of the sound produced?

Question 3 options:

	0.4 feet
	2.5 feet
	4.4 feet
	11 feet

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Question 4 (1 point)

On a day when the speed of sound in air is 340 m/s, a lightning bolt is observed and the resultant thunderclap is heard 5 seconds afterwards. About how far away was the lightning bolt?

Question 4 options:

	68 m
	1700 m
	1020 m
	88,000 m

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Question 5 (1 point)

You hear a musician playing a series of notes of increasing frequency. As the frequency increases, the wave speed

Question 5 options:

	stays the same.
	decreases.
	increases.

Answer 1

Answers:

Question (1) Answer : transverse waves

Question (2) Answer : inverse of its frequency.

Question (3) Answer : 2.5 feet

Since: v = _$\lambda$ f

Thus: _$\lambda$ = v / f = (1100 feet/sec) / (440 s^-1) = 2.5 feet

Question (4) Answer : 1700 m

Question (5) Answer : stays the same.