Question 1

A mass attached to a spring oscillates back and forth, as shown in the images. If the amplitude of the oscillation is doubled, what happens to the maximum potential energy stored in the spring?

Accepted Answer

It is quadrupled.

Question 2

Which of the following best describes the difference between transverse and longitudinal waves?

Accepted Answer

Transverse waves oscillate perpendicular to the direction of propagation, while longitudinal waves oscillate parallel.

Question 3

A sound wave travels through air and then enters water. What happens to its speed and wavelength, assuming frequency remains constant?

Accepted Answer

Speed increases, wavelength increases.

Question 4

A string fixed at both ends vibrates in its third harmonic. Which statement is correct about the standing wave pattern?

Accepted Answer

There are four nodes and three antinodes.

Question 5

The period $$T$$ and frequency $$f of a $$wave are related by which equation?

Accepted Answer

$$T = \frac{1}{f}$$

Question 6

A car horn emits a sound of frequency $$f_0 as it $$approaches a stationary observer. Due to the Doppler effect, the observer hears a frequency $$f$$ that is:

Accepted Answer

$$f \u003e f_0$

Question 7

Which of the following is a correct statement about resonance?

Accepted Answer

Resonance occurs when the driving frequency matches the natural frequency of a system.

Question 8

A water wave is an example of which type of wave?

Accepted Answer

Mixed mode (both transverse and longitudinal)

Question 9

The speed of a wave on a string is given by $$v = f \lambda. If $$the frequency is doubled and the speed remains constant, what happens to the wavelength?

Accepted Answer

It is halved.

Question 10

Which of the following best explains why sound cannot travel through a vacuum?

Accepted Answer

Sound waves require a material medium for the oscillation of particles.

Question 11

A glass shatters when a singer hits a certain note. This is an example of:

Accepted Answer

Resonance

Question 12

Which of the following statements about the energy transfer in waves is correct?

Accepted Answer

Waves transfer energy but not matter.

Question 13

A wind instrument changes pitch by altering the length of its air column. If the length is increased, what happens to the fundamental frequency?

Accepted Answer

It decreases.

Question 14

Which of the following frequencies is outside the range of human hearing?

Accepted Answer

15 Hz

Question 15

A tuning fork vibrates at its natural frequency and causes another nearby tuning fork of the same frequency to vibrate. This phenomenon is called:

Accepted Answer

Resonance

Question 16

If a wave has a period of $$0.01$$ seconds, what is its frequency?

Accepted Answer

$$10 Hz$$

Question 17

Which of the following best describes the relationship between pitch and frequency for sound waves?

Accepted Answer

Higher frequency corresponds to higher pitch.

Question 18

A supersonic jet creates a shock wave as it travels faster than the speed of sound. What is the main feature of this shock wave?

Accepted Answer

It forms a conical wavefront.

Question 19

Which of the following is true about the amplitude of a wave?

Accepted Answer

It is the maximum displacement from equilibrium.

Question 20

A person hears a higher pitch as an ambulance approaches and a lower pitch as it moves away. This is an example of:

Accepted Answer

Doppler effect

Waves and Sound: Oscillations, Wave Types, and Sound Phenomena

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