Free Printable FSKS 123: Chapter 16 (Waves)

1.

The distance between 4 peaks is 0.7 m. The wavelength of the wave is (a) m. The period of the wave is (b) s. The frequency of the wave is (c) Hz. The amplitude of the wave is (d) cm. The speed of the wave is (e) m/s

Choose from the below words

40

1.0

2.0

4.0

0.10

0.025

70.0

0.175

7.0

28.0

2.

A transverse wave on a string has an amplitude 3A.

A tiny spot on the string is colored Green. As one cycle of the wave passes by, what is the total distance traveled by the green spot?

a)

3 A

b)

6 A

c)

$\frac{1}{3}$ A

d)

12 A

3.

As a wave moves through a medium at a speed v, the particles of the medium move in simple harmonic motion about their undisturbed positions.

When the amplitude of the wave triples, the wave speed v ______________.

a)

becomes 3 times bigger

b)

stays the same

c)

becomes one third (1/3)

d)

becomes 9 times bigger

4.

The speed of a wave on a string increases when you increase the (a) of the rope, but wave speed decreases when you increase the (b) of the rope

Choose from the below words

tension

linear density

length

amplitude of the disturbance

price

temperature

5.

At a distance of 4.5 m from a loudspeaker, the sound intensity is $4.0\times10^{-2}W/m\ \$ . Assuming that the loudspeaker radiates sound uniformly in all directions, find the total power radiated by the loudspeaker

a)

10.18 W

b)

$1.57\ \times\ 10^{-4\ }$ W

c)

2.26 W

d)

6361.73 W

6.

Organize these options into the right categories

Categorize the following

$v=\sqrt{\frac{\gamma\ kT}{\rho\ }}$

$v=\sqrt{\frac{B_{ad}}{\rho\ }}$

$v=\sqrt{\frac{Y}{\rho\ }}$

Waves travel slowest here

Waves travel with intermediate speed

Nice for breathing

Lekker for drinking

Yummy for eating

Waves travel fastest here

Gas

Liquid

Solids

7.

At a certain distance from a sound source, the intensity level is 70 dB and a frequency of 750 Hz. What is the intensity of the sound in $\frac{W}{m^2}\$ ?

The threshold intensity is $I_{0\ }=1\ \times\ \ 10^{-12\ }W.m^{-2\ }$

a)

$1.0\ \times10^{-5}\ \frac{W}{m^2}$

b)

$2.0\ \times10^{-6}\ \frac{W}{m^2}$

c)

$5.0\ \times10^{-7}\ \frac{W}{m^2}$

d)

$1.0\ \times10^{-3}\ \frac{W}{m^2}$

8.

When I double the distance between me and the sound of my girlfriend complaining, the sound intensity $I$ becomes

a)

$2I$

b)

$\frac{I}{2}$

c)

$4I$

d)

$\frac{I}{4}$

9.

Match the form of the doppler effect equation with the scenario described (CHECK FORMULA SHEET)

Source and observer stationary

$f_{o\ }=\ f_{s\ }\left(\frac{v}{v-v_s}\right)$

Source approaching stationary observer

$f_{o\ }=\ f_{s\ }\left(\frac{v}{v+v_s}\right)$

Source and observer moving away from each other

$f_{o\ }=\ f_{s\ }\left(\frac{v-v_o}{v+v_s}\right)$

Source and observer moving towards each other

$f_{o\ }=\ f_{s\ }\left(\frac{v+v_o}{v-v_s}\right)$

Source moving away from stationary observer

$f_o=f_s$

10.

A blue car travels down the highway at a speed of 60km/h. The car's horn makes a sound at a frequency of 660 Hz.

A red passenger car traveling at 44 km/h is on the other side of the highway.

What is the frequency of the horn heard by a passenger in the red car?

a)

489 Hz

b)

607 Hz

c)

718 Hz

d)

482 Hz

FSKS 123: Chapter 16 (Waves)

Total questions: 10

Worksheet time: 41mins

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