Sound

Sound is produced by an object that ...

Sound cannot travel through ...

Reflected sound that is heard after the original sound has finished is called ...

The pitch of a sound is determined by ...

During rain, lightning is seen before the thunder is heard. This happens because ...

Which of the following can be a source of sound?

Sound travels fastest through ...

The greater the amplitude of vibration, the ... the sound is.

A sound with a regular frequency is called ...

Reflected sound (an echo) can be used to ...

Reverberation in a large room can be reduced by ...

Sounds that a normal human ear can hear have a frequency of ...

On a guitar, a longer string produces a ... note.

A sound whose frequency is irregular is called ...

When we shout inside a cave, our voice is heard again. This shows that sound can be ...

A ship sends a sound to the seabed and receives its echo 4 seconds later. If the speed of sound in water is 1,500 m/s, the depth of the sea is ...

Bonar shouts in front of a cliff and hears the echo 2 seconds later. If the speed of sound in air is 340 m/s, Bonar's distance from the cliff is ...

An electric bell is rung inside a glass container. After the air inside is pumped out, the bell is barely heard. The best conclusion is ...

Guitar A has a thick string and guitar B has a thin string. If both are plucked with the same force, guitar B will sound ...

The walls and ceiling of a cinema are covered with porous material. The purpose of installing this material is ...