The diagram shows a ripple tank that a student used to investigate water waves.

The student adjusted the speed of the motor so that the bar hit the water more times each second.

What happened to the frequency and wavelength of the waves produced?

• Frequency decreased & Wavelength decreased.

• Frequency increased & Wavelength did not change.

• Frequency increased & Wavelength decreased.

• Frequency increased & Wavelength increased.

• Frequency decreased & Wavelength increased.

The diagram shows a ripple tank that a student used to investigate water waves.

The student measured the frequency of the water waves as 5 hertz.

Calculate the period of the water waves.

(answer with the unit symbol).

A lorry has an air horn. The air horn produces sound waves in the air.

Use one word to complete the following sentence.

Sound waves cause air particles to ___________________________ .

A lorry has an air horn. The air horn produces sound waves in the air.

The air horn produces sound waves at a constant frequency of 420 Hz.

The wavelength of the sound waves is 0.80 m.

Calculate the speed of the sound waves in m/s. (Answer to 3 sig fig, do not put the units)

P-waves and S-waves are two types of seismic wave caused by earthquakes.

Which one of the statements about P-waves and S-waves is correct?

• P-waves and S-waves are transverse.

• P-waves and S-waves are longitudinal.

• P-waves are transverse and S-waves are longitudinal.

• P-waves are longitudinal and S-waves are transverse.

Seismometers on the Earth’s surface record the vibrations caused by seismic waves.

The diagram below shows the vibration recorded by a seismometer for one P-wave.

Calculate the frequency of the P-wave shown in the diagram above in hertz.

(answer to 2 sig fig, no units needed)

Seismometers on the Earth’s surface record the vibrations caused by seismic waves.

The diagram below shows the vibration recorded by a seismometer for one P-wave.

The P-wave shown in the diagram above is travelling at 7200 m/s.

Calculate the wavelength of the P-wave in meters. (answer to 2 sig fig, no units needed)

Different parts of the electromagnetic spectrum are useful for different methods of communication.

Wave J is reflected by a layer in the atmosphere called the ionosphere.

Wave K will also be reflected by the ionosphere. Will wave K reach the receiver?

• Yes

• No

Different parts of the electromagnetic spectrum are useful for different methods of communication.

What is the name given to the dashed line in the diagram? The __________ . (one word answer).

Figure 2 shows a transmitter sending a signal to a satellite orbiting the Earth.

Which type of electromagnetic wave is used to send a signal to a satellite?

• Gamma

• Microwave

• Visable light

• Ultraviolet