Consider the energy transfers and transformations listed below in parts (a) thro
ID: 2116004 • Letter: C
Question
Consider the energy transfers and transformations listed below in parts (a) through (e). For each part, (i) describe human-made devices designed to produce each of the energy transfers or transformations and, (ii) whenever possible, describe a natural process in which the energy transfer or transformation occurs. Give details to defend your choices, such as identifying the system and identifying other output energy if the device or natural process has limited efficiency.
a) Chemical potential energy transforms into internal energy.
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(b) Energy transferred by electrical transmission becomes gravitational potential energy.
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(c) Elastic potential energy transfers out of a system by heat.
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(d) Energy transferred by mechanical waves does work on a system.
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(e) Energy carried by electromagnetic waves becomes kinetic energy in a system.
Explanation / Answer
A. in the atomic bomb, the chemical energy is the one that is stored which is used to destroy anything.... but it gets converted as the internal energy
B. electricity is used to run the motors which in turn pum the water to the overhead tank and so gravitational potential energy
d. hering machine gathers the sound waves which is nothing but mechanical waves and hence the microphone operates it... nothing but doing work where sound waves are the source
e. the electromagnetic waves falls on the photoemissive material, which emits electrons having kinetic energy, thus changing electromagnetic energy into kinetic energy