Explain the energy changes taking place in the following situations:
Answers
As we are already aware that energy can neither be created nor destroyed. It can just change from one form to another. In the below attached file shared here the change of energy is taking place as follows:-
• In the first picture, the girl and the hair dryer, the electrical energy is being transformed into heat energy (as hair dryer gives out heat). Apart from this sound is also produced so sound electrical energy is also being transformed into sound energy. As the fan inside the dryer is rotating so it is also being transformed into mechanical energy.
• Second picture – energy is being transformed into impulses that carry signals. So at the user end the energy will be transformed into different forms of energy basically into light and sound energy. Some amount of heat energy is also produced along with mechanical energy.
• In third picture – the mechanical energy is being transformed into potential and kinetic energy as the broom is being used mechanically and the dust particles are being moved from one place to another. Some amount of sound energy and friction is also produced.
• In fourth picture electrical energy is being transformed to create difference in temperature that cools water. So amount of work has been done by the energy while cooling the water to a particular temperature.
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