עמוד:25

Simultaneous Transformations and Transfers of Energy Sometimes , one type of energy is transformed simultaneously into several other types of energy or is transferred simultaneously to several other objects . For example , in a computer , electrical energy in the speakers is converted into sound energy while in the screen it is converted into radiation energy . Question An oven , a television , and a fan are all on in an apartment . 1 . Is this an example of the simultaneous transformation of energy into several kinds ? Explain . 2 . Is this an example of the simultaneous transfer of energy to several bodies ? Explain . Did You Know …? Solar Cooker * A solar cooker is a device that uses the energy of direct sunlight to heat food . A mirror is used to concentrate the sunlight on a container of food . The food container has a black coating so that most of the light that strikes it is absorbed , heating up the container . Surfaces of other colors ( such as blue , yellow or red ) absorb much less light and therefore heat up less . Solar cookers enable you to cook without lighting a fire , thus reducing the danger of accidental fires . A solar cooker may be used not only in the summer , but also on clear winter days as well . Using solar cookers saves natural resources . They are suitable for use by hikers who wish to heat up food , by refugees in refugee camps , and even by soldiers camped out in the field who wish to prepare hot meals . Solar cooker : A device that utilizes radiation energy from the sun to heat food . A solar cooker

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