Sound

Sound is caused by...

• vibrations of matter

• noise

• source of sound

• particles

What is the speed of sound in solid?

• 330 m/s

• 1500 m/s

• 2000 m/s

• 5000 m/s

Which of the following produces sound of energy?

• still water in a pond

• ticking clock

• heating ovens and furnaces

• spaceship traveling in space

Which of the following is a use of ultrasound?

• observing structures within the human body

• fishermen detecting shoals of fish

• warning of danger

• all of above

The number of cycles per second is called....

• pitch

• frequency

• loudness

• amplitude

The unpleasant sound....

• pitch

• noise

• loudness

• vibrations

A tube in external ear is called...

• eardrum

• bones

• ear canal

• cochlea

The part of ear receives electrical signals is called....

• hammer

• anvil

• ear drum

• ear nerve

The technique that use sound to gathered information about the environment is called....

• ultrasound

• sonar

• oscilator

What is the unit of frequency?

• m/s

• second

• dB

• hertz