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Posted by V Siva 6 years, 9 months ago
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Gaurav Seth 6 years, 9 months ago
Characteristics of sound
There are different characteristics of sound which are as follows:
- Loudness
- Pitch
- Quality
- Intensity
Loudness
It is a characteristic of sound, the degree of sensation of sound. It depends upon amplitude. Amplitude determines the loudness of sound. Loudness is proportional to the square of the amplitude of the vibrating body which produces sound. More is the amplitude, louder is the sound. It is measured in unit ‘decibel’.
The more the amplitude of vibration, louder the sound. The lesser the amplitude of vibration, the sound gets feeble.
Pitch
It is the property that determines the shrillness (sharpness) or depth of sound. It depends upon the frequency. More the frequency, more the voice is shrilled. Less the frequency, deep is the sound. For example: a baby’s voice has more frequency and thereby, it is shriller than an adult’s voice.
Quality
It is the property by which one can distinguish between two different sounds of same pitch and loudness. Like in a dark room where there is no light and 100 people are present, we can easily recognize the sound of our friend among all the people due to the particular quality of its sound.
Intensity
It is defined as the number of sound waves passing 1 meter square area in one second. It depends upon the square of amplitude.
Sound can travel through all 3 states of matter that is solids, liquids and gases.
Speed of sound depends upon the density (density is defined as mass per unit volume) of medium (it increases with increase in density of mediums).
Speed of sound is maximum in solids and least in gases as particles are closer in solids. So, transfer of sound energy occurs faster. Speed of sound in air is 340 metre per second.
Posted by Subham Mishra 6 years, 9 months ago
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Yogita Ingle 6 years, 9 months ago
SP = Rs 5225
Let MP be x
discount = 5% of x
=(5/100)x = 0.05x
SP = MP - discount
⇒ 5225 = x - 0.05x
⇒ 0.95x = 5225
⇒ x = 5225/0.95 = 5500
∴ MP = Rs 5500
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Gaurav Seth 6 years, 9 months ago
Sedition Act was passed in the year 1870.
The Sedition Act, allowed the government to arrest or detain any person without a fair trial in the court who was seen protesting or criticizing the British authority.
This was an example of arbitrary use of power by the British, as it authorized them to arrest person without evidence who was possibly seen as stirring up a rebellion.
Under this act, people were arrested without being told the reason for their arrest and were kept in prisons without a trial.
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V Siva 6 years, 9 months ago
5Thank You