Science questions in short. [2 marks ]

initially, the person is able to hear the sound coming from air water distinctly. But after sometime, when the air is completely removed from the bottle, the sound will pass through the water and not reached to man. So, the man will not hear the sound which was coming through the air initially.

The air particles near the sound producing body vibrate and exchange energy, which is received by our ears and we are able to hear the sounds.

The sensation of frequency is called “pitch” The high frequency indicates high pitch and vice-versa.

Noise pollution has adverse effects physical as well as mental behavior. The constant exposure to noise pollution can create many health related problems like hypertension, insomnia, mental disorder and may even lead to loss of hearing.

Musical sounds are those sounds which are pleasing to the ear while noise is those sounds which are unpleasant to the ear.

Because moon does not have any atmosphere and sound its does not have any medium for sound to travel as sound does not travel in vacuum.

Hearing impairment is the hearing defect of a person. Total hearing impairment is a problem usually from birth but partial hearing impairment is caused due to age, injury or illness.

It will create more loud sound in case of string stretched with a greater force because amplitude is greater in this case and loudness depends on the amplitude. Greater will be the loudness, greater will be the amplitude.

Manjira consists of two metal discs that when struck against each other produces sound. When the two metal discs are struck against each other they vibrate and produce sound.

The to - and – fro motion of an object in a medium is called vibration. Amplitude is the largest distance from the mean position of the object.

Amplitude is defined as the loudness of sound. When the amplitude is large the sound produced is large and if the amplitude is small then the sound produced is also small.

Since, range of frequency for every vibrating body is diffrent. But we can hear the vibrations which lies between the range of frequencies from 20 Hz, so sound of every vibrating body cannot be heard by us.

As a fire cracker explodes it produces a vibration in the air medium around it which is the reason we can hear a fire cracker exploding.

When the vocal cord is:
Tight and thin: the sound produced is of high frequency or it is of high pitch.
Loose and thick: the sound produced is of low frequency or low pitch.

The shrillness of sound is the characteristic property of sound which differentiates the sound between male and female. Usually the voice of a woman has higher frequency and shriller than the voice of a man.

Because the track is made of metals and sounds travel faster in solids than air. Thus, we can hear the sound of an approaching train even when the train is far off but its sound cannot be heard through the air.

Yes, the frying pan will vibrate Since, it is bieng hit by the stick but vibrations need a medium to travel and there is no medium in vacuum, so we'cannot hear the vibrations produced.

This is because the amplitude of vibrations is small when we beat the spoon lightly and so feeble sound is produced but when it is beaten with force then, amplitude of vibrations is large, so loud sound is produced.

The name of passage in the outer ear which carries sound waves to the eardrum is ear canal.

A sound making object is a vibrating object for which it can produce sound while a silent body is a non-vibrating object.

Because sound needs material medium to transfer energy from on particle to another particle. If there is vacuum, then no energy transfer takes place.

The shrillness of sound is the characteristic property of sound which differentiates the sound between male and female. Usually, the voice of a woman has higher frequency and shriller than the voice of a man.

Sound propagates fastest in solid medium, so the sound of an approaching train can be heard even when the train is far off.

The pitch of a sound you hear depends on the frequency of the sound wave. A high frequency sound wave has a high pitch, and a low frequency sound wave has a low pitch.