Sound

Define Echo ( 1 mark )

The speed of Sound in air

• 150 meters per second
• 500 meters per second
• 700 meters per second
• 343 meters per second

Define reverberation? ( 1 mark )

Define Ultrasound ( 1 mark)

what is a transmitter

• A transmitter is a device that receives signals from other devices.
• A transmitter is a type of food used in cooking.
• A transmitter is a tool used for gardening.
• A transmitter is a device that generates and sends out signals or information through a medium such as air or a cable.

What is a receiver?

• A receiver is a device that transmits signals to a transmitter.
• A receiver is a type of software used for editing photos.
• A receiver is a term used in sports to describe a player who scores points.
• A receiver is a device that receives signals or information from a transmitter.

Describe a way that a doctor could use ultrasound. ( 2 marks )

Define SONAR and also explain how is it used in oceans or fishing with neat daigram. ( 3 marks )

What is oscilloscope

• An oscilloscope is used for cooking food
• An oscilloscope is a type of musical instrument
• An oscilloscope is a device used to visualize and analyze the waveform of electronic signals.
• An oscilloscope is a type of vehicle

Draw the hard and soft waveforms of sound. ( 2 marks )