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How are these works (washing machine - c...

How are these works (washing machine - cleaning the cloth, vaccum cleaner - cleaning the house) being done ?

Text Solution

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All the works mentioned above are being done by utilizing human muscular energy or electrical energy.
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Knowledge Check

  • Soap helps in cleaning the clothes because

    A
    it reduces the surface tension of solution
    B
    it gives strength to solution
    C
    it absorbs the dirt
    D
    none of the above

  • Soap helps in cleaning the clothes because

    A
    it reduces the surface tension of solution
    B
    it gives strength to solution
    C
    it absorbs the dirt
    D
    none of the above

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