40 ! answer all or the points will be taken !

what types of mediums can sound travel through?

a.) only liquid and gas
b.) solid, gas, or liquid
c.) only gas
d.) only solid and gas

what makes up a sound wave as it travels through the air?

a.) differences in pitch
b.) differences in air pressure
c.) echoes
d.) flow of air molecules

how is the sound of knocking on a wooden door heard by a person on the other side?

a.) the sound waves from the knocking travel through the air around the door.
b.) the particles of the door vibrate, making sound waves that pass through the door.
c.) the energy of the knocking forms electromagnetic waves, which are converted into sound waves on the other side of the door.
d.) the energy of the knocking forms mechanical waves, which are converted into sound waves on the other side of the door.

what effect does the elasticity of the medium have on the speed of sound?

a.) if the speed of sound is increased, then that causes the medium to be less elastic
b.) the more elastic the medium, the slower the speed of sound
c.) if the medium is less elastic, then that causes the sound waves to move faster
d.) the more elastic the medium, the faster the speed of sound

sound is a disturbance that travels through a medium as a wave.

a.) longitudinal
b.) transverse
c.) standing
d.) surface

in which medium would sound travel the fastest?

a.) gas
b.) solid
c.) liquid
d.) vacuum

who was the first person to break the sound barrier?

a.) chuck yeager
b.) orville wright
c.) alexander graham bell
d.) john glenn

what does the speed of sound depend on?

a.) the properties and range of the pitch of the sound
b.) the loudness of the sound generated
c.) the sources of the sound waves
d.) the properties of the medium it travels through

in media in the same state of matter (gas, solid, or liquid), how do differences in density affect the speed of the sound waves?

a.) when the density is higher, the speed of sound is lower.
b.) the density does not affect the speed of sound in media.
c.) when the density is lower, the speed of sound is lower.
d.) when the density is higher, the speed of sound is higher.

sound is a wave.

a.) mechanical
b.) electromagnetic
c.) transverse
d.) potential energy