How can you say that sound is a form of energy? Explain with examples.

Sound or Sound Energy - is produced when an object is made to vibrate. Sound energy travels out as waves in all directions. Sound needs a medium to travel through, such as air, water, wood, and even metal

 

Heat energy (or just heat) is a form of energy which transfers among particles in a substance (or system) by means of kinetic energy of those particle. In other words, under kinetic theory, the heat is transferred by particles bouncing into each other.

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ight which we see is basically a electromagnetic radiation , any electric charge which accelerates, or any changing magnetic field, produces electromagnetic radiation.and The photon is the quantum of the electromagnetic interaction and the basic "unit" of light and all other forms of electromagnetic radiation and is also the force carrier for the electromagnetic force.

Light, which is emitted and absorbed in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality

Explanation
and we know energy is ability to do work on other physical system ,also one form of energy can be converted to other.
so light photon can cause electricity (which is a form of energy) see herehttp://en.wikipedia.org/wiki/Photoelectr…
the photon possess some energy which used in exciting electron of an conductor


and 

this you must have experienced when you go out in blazing sun you feel your body getting warmed up which shows light possess energy (heat a form of energy)

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Sound is a compression wave travelling through the air. When you hear a sound it is because it is making your eardrum vibrate, your eardrum is absorbing energy from the sound wave. Too loud a sound can damage the eardrum. Another approach is to think of the generation of the sound, which in a loudspeaker is done by making the cone inside it vibrate. I'm sure you must have heard of speakers being given a power rating, 5 watts, 10 watts, etc. This is the power being put into the speaker to produce the sound

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