A-Level Physics: Sound Waves and Experiments

What is the frequency of the sound emitted by the loudspeaker in the problem?

• 1.5 kHz

• 2.0 kHz

• 2.5 kHz

• 1.7 kHz

In a longitudinal wave, what is the displacement of particles at a compression point?

• Positive

• Zero

• Maximum

• Negative

How is the wavelength calculated using the speed of sound and frequency?

• Speed of sound divided by frequency

• Speed of sound multiplied by frequency

• Frequency divided by speed of sound

• Frequency multiplied by speed of sound

What formula is used to calculate the maximum speed of oscillating particles?

• v = omega / a

• v = a * omega^2

• v = a / omega

• v = omega * a

What is the unit of the calculated maximum speed of oscillating particles?

• m/s

• mm/s

• km/h

• cm/s

What is the molar mass of air used in the RMS speed calculation?

• 3.1 * 10^-2 kg/mol

• 2.9 * 10^-2 kg/mol

• 3.0 * 10^-2 kg/mol

• 2.8 * 10^-2 kg/mol

What is the calculated RMS speed of air molecules in the room?

• 400 m/s

• 700 m/s

• 600 m/s

• 500 m/s

In Method A, what is varied to measure the speed of sound?

• Amplitude of the sound

• Position of the microphone

• Position of the loudspeaker

• Frequency of the sound

In Method B, what type of wave is used to determine the speed of sound?

• Transverse wave

• Longitudinal wave

• Surface wave

• Stationary wave

How can uncertainty in the speed of sound measurement be minimized without additional apparatus?

• Increase frequency

• Decrease wavelength

• Measure over multiple wavelengths

• Use a different loudspeaker