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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Match the Following Columns1. Running Water 2. Burning 3.Energy 4.Sound Energy 5.Nuclear Energy - Physics

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प्रश्न

Match the following columns

COLUMN A  COLUMN B
1. Running water  1. heat energy 
2. Burning  2. vibrations 
3.Energy  3.atom bomb
4.Sound energy  4.kinetic energy 
5.Nuclear energy  5.joule
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उत्तर

Match the following columns

COLUMN A  COLUMN B
1. Running water  1.  kinetic energy 
2. Burning  2. heat energy
3.Energy  3.joule
4.Sound energy  4. vibrations 
5.Nuclear energy  5. atom bomb
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अध्याय 3: Energy - Objective Questions

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सेलिना Concise Physics [English] Class 7 ICSE
अध्याय 3 Energy
Objective Questions | Q 3

संबंधित प्रश्न

Write true or false of the following statement.

In an electric fan, electrical energy changes into the mechanical energy.


Fill in the blank

An electric fan converts electrical energy into ______ energy.


 Fill in the blank

Cooking gas converts _______ energy into heat energy.


What is potential energy ? State its unit.


What is energy?


Study the following activity and answer the questions.
  1. Take two aluminium channels of different lengths.
  2. Place the lower ends of the channels on the floor and hold their upper ends at the same height.
  3. Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.
Questions:
  1. At the moment of releasing the balls, which energy do the balls have?
  2. As the balls roll down which energy is converted into which other form of energy?
  3. Why do the balls cover the same distance on rolling down?
    Note: The question is wrong. It should be "Why do the balls cover the same distance after rolling down"?
  4. What is the form of the eventual total energy of the balls?
  5. Which law related to energy does the above activity demonstrate? Explain.

We make useful objects from a variety of substances. Another use of substances is that we get energy from some of them.
When we have run a long distance, we feel tired. We have to stop. Why is that?


When a body falls freely towards the earth, then its total energy


Which one of the following is not the unit of energy?


Define kilowatt hour.


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