An Object Produces Sound for Which of the Following Reasons

A vibrating string can produce a sound. Sound travels slower in air because of the increased distance between air particles.

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C Vibrating objects produce sound.

. Sound travels faster in air because of the decreased distance between air particles. Occurs when an object is made to vibrate at its natural frequency by absorbing energy from a sound wave or other object vibrating at this frequency. Sound is mechanical wave which require medium to travel.

Frequencies at which an object will vibrate when it is struck or disturbed. The sound made by blowing a wind instrument. If an object moves back and forth quickly it will cause a high pitch sound such as that of a bell.

A Dholak b Sitar c Flute. An object should vibrate in order to be table to produce sound. We cannot hear the sound produced by a vibrating pendulum.

Sound is produced by vibrating objects. The vibrating body causes the medium water air etc around it to vibrate. A pendulum oscillates 40 times is 4 seconds.

Name the sound producing organ in humans. When we blow across the mouth of each bottle then i The bottle with the less air in it gives the note of higher pitch ii The shorter the air column the higher the pitch of the. The sound from a mosquito i produced when it vibrates its wings at an average rate of 500 vibrations per seconds what is the.

Repeated echoes of sound. Object is called vibration. Up to 24 cash back The main causes of noise pollution are.

The coefficient of elasticity of solid is large. I Horn blown by Traffic on the road ii noise produced by machines in factories iii In our hose noise is cause by mixers and grinders vacuum cleaners air coolers etc iv Loud music produced by speaker 7. Strictly the sound produces at one breath.

In human beings the vibration of the vocal cords produces sound. Find its time period and frequency. Name the organs of hearing in our body.

Which of the following statements are correct. What should an object do to produce sound. Name the part which vibrates to produce sound in the.

D All of these 24. B It takes twice as much fossil-fuel energy to produce ethanol than the ethanol that is produced supplies. Some key points to remember from the chapter are given below.

The speed of sound Is too small when compared to speed of light. Activity 133 Take a metal dish. In other words the sound is produced by vibrating objects.

A sound making object vibrates while a silent does not. NCERT Solutions for Class 8 Science Chapter 13 Sound Topics and Sub Topics in Class 8 Science Chapter 13 Sound. Compression and rarefaction involve changes in density and pressure.

C It can drive costs of corn higher. You can feel the vibrations by touching them. Section Name Topic Name 13 Sound 131 Sound is Produced by a Vibrating Body 132 Sound Produced by Humans 133 Sound Needs a Medium for Propagation 134 We Hear Sound through Our Ears 135 Amplitude Time.

Accessibility and font size adjustments. A Sound is a form of energy which produces a sensation of hearing in our ears. When a tightly stretched band is plucked it vibrates and produces sound.

One who or that which ticks or produces a ticking sound as a watch or clock a telegraphic sounder etc. Can you feel the dish. An object produces a sound of constant frequency.

We hear a variety of sounds in our surroundings. The energy required to make an object vibrate and produce sound is produced by some external forces like wind. The speed of sound in solids is maximum though their density is large.

How does an object produce sound. A time period b amplitude c hertz d noise. Again strike the dish and then touch it.

Strike it at its edge with a spoon Fig. Do you hear a sound. Total time 4 seconds.

Have a glance at the MCQ of Chapter 13 Science Class 8 and cross-check your answers during preparation. Short string produces notes of low pitch. When an object vibrates then the air around it also vibrates and carry that sound to our ears through the vibration of molecules.

B Sound cannot be produced without utilizing energy. The sound made by a bullet in striking a solid object or in passing through the air. Identify the part which vibrates to produce sound in the following instruments.

Up to 24 cash back B. Vibrations in the air are called travelling longitudinal waves which we can hear. D All of these Ans.

D All of the above. A Pollutants arent significantly. How does a sound making object differ from one that is silent.

How is sound produced. Sound is produced when an objects vibrates. This process is called a hearing.

Sound is produced when something vibrates. Voice box larynx Question 5. For which of the following reasons is production of ethanol unwise.

Dholak has stretched membranes which vibrate to produce sound. In sitar the stretched strings when vibrate they produce sound. This is how string instruments such as a guitars and violins work.

Baby girl is likely to have minimum frequency. When it stops vibrating it does not produce any sound. Sound is produced by vibrating objects.

The pitch of a sound is determined by how quickly or slowly an object moves back and forth. Sound waves consist of areas of high and low pressure called compressions and rarefactions respectively. Which of the following shows a pleasant sound.

Some examples of objects that produce sounds are as followsFlute by air expressing through the holes that are openDrums by an object hitting the surface and resonating through the hollow inside. In case of longitudinal waves the particles of medium. Thin string produces notes of high pitch Tightly stretched string produces notes of low pitch.

Sound can travel through solids liquids and gases. Pour water in it. If an object moves back and forth slowly it will cause a low pitch sound such as that of a drum.

Number of oscillations 40. B Both assertion and reason are true but reason is not the correct explanation of assertlon. Although such strings are made of.

Sound travels slower in solids because of the decreased distance between solid particles. The eardrum senses the vibrations of sound it sends the signals to the brain.

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