SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Coal is sometimes burnt in order to drive steam engines. Which of the following is the sequence of energy changes involved in the activity?
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chemical to kinetic to electrical
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chemical to heat to kinetic
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kinetic to electrical to chemical
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chemical to kinetic to heat
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Explanation:
Detailed explanation-1: -Energy changes in a steam engine: In a steam engine, the chemical energy of coal is first converted into heat energy of steam, now this steam is used to operate the engine. So, there is the transformation of the energy from chemical energy to heat energy and then to mechanical energy.
Detailed explanation-2: -(ii) Steam engine: Chemical energy of coal first changes to heat energy of steam and then heat energy changes into mechanical energy.
Detailed explanation-3: -Firstly the chemical energy is converted into thermal energy, and then this thermal energy is converted into mechanical energy. Gasoline burns and generates heat.
There is 1 question to complete.