Sound Grade 8

sound can be generated from a _____ object

• Vibrating

• stationary

• waves

• height

region in which air is at high pressure and high

density is called ________

region in which air is at low pressure and low density is called

• Compression

• Frequency

• rarefaction.

• amplitude

Sound generation and propagation needs a _______

• vacuum

• tuning fork

• none of these

• medium

the following is the image of a

• metal

• Tuning fork

• electric bell

Two astronauts on the moon talking to each other directly, will be

unable to listen to each other

one compression and one rarefaction together forms one

cycle of the ______

• wave

• frequency

• compressions

• amplitude

The frequency is measured in

The _______of a tuning fork is decided by the dimensions of the prongs

• rarefractions

• compressions

• frequency

• wavelenght

Which is the following musical instrument?

• Sitar

• Flute

• tabla

• shehnai