Question

Question 16 (1 point)

Sound waves that travel through the air are

Question 16 options:

	50/50 combination of transverse and longitudinal waves.
	mostly longitudinal with small admixture of transverse.
	longitudinal waves.
	mostly transverse with small admixture of longitudinal.

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Question 17 (1 point)

A photon having a frequency of 3 x 10¹⁴ Hz has an energy of ________J.

Question 17 options:

	2.2 x 10-48
	1.99 x 10-19
	4.5 x 1047
	5.97 x 10-11

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Question 18 (1 point)

You and a friend are making waves in a slinky. The friend holds one end of the slinky stationary on the floor while some distance away you move the other end of the slinky back and forth on the floor, perpendicular to the length of the slinky. If you increase the frequency of the movement of your end of the slinky, the wavelength of the wave in the slinky will

Question 18 options:

	Increase
	Decrease
	Remain the same

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Question 19 (1 point)

Which of the following radiations have the most energetic photons?

Question 19 options:

	Infrared
	Microwave
	gamma

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Question 20 (1 point)

Which of the following types of waves can travel through a vacuum?

Question 20 options:

	Infrasound
	Infrared
	Ultrasound

Answer 1

Answers :

Question (16) Answer : Sound waves that travel through the air are :

• longitudinal waves.

Question (17) Answer : A photon having a frequency of 3 x 10¹⁴ Hz has an energy of ________J

• 1.99 x 10^-19

Because : Energy (E) = h f = (6.625 x 10^-34 Js)(3 x 10¹⁴ Hz) = 1.99 x 10^-19 J

Question (18) Answer : You and a friend are making waves in a slinky. The friend holds one end of the slinky stationary on the floor while some distance away you move the other end of the slinky back and forth on the floor, perpendicular to the length of the slinky. If you increase the frequency of the movement of your end of the slinky, the wavelength of the wave in the slinky will :

• Decrease

Because, Wavelength and frequency are inversely proportional to each other.

Question (19) Answer : Which of the following radiations have the most energetic photons?

• gamma

Question (20) Answer : Which of the following types of waves can travel through a vacuum?

• Infrared

Because : Infrared radiations are electromagnetic radiations and electromagnetic radiations can travel in vacuum.