Question

4 th and 5 th questions

Answer 1

Answer:

4 according to Newton's first law of motion when a carpet is beaten it moves and wants backward leaving the dust particles behind. That's Why.

5 according to Newton's third law of motion when the outer environment pressurise the object the paper or thermacol (as per used ) gives out equal and opposite pressure on the object to prevent breakage.

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Answer 2

Answer:

A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity. Any other quantity of that kind can be expressed as a multiple of the unit of measurement. For example, a length is a physical quantity.