(e) A micrometer screw gauge is used to measure internal and external dimensions of a test tube.

5. If an object weighs 30 N on the earth, what is its mass?



Answer :

Final answer:

Mass is a measure of the amount of matter in an object, while weight depends on gravity. The weight of an object can be calculated using the formula w = mg.


Explanation:

Mass is a measure of the amount of matter in an object, and it remains constant regardless of the gravitational field. On Earth, an object's weight can be calculated using the formula w = mg, where g is the acceleration due to gravity (9.8 m/s²). If an object weighs 30 N on Earth, its mass would be 30 N divided by 9.8 m/s², which equals approximately 3.06 kg.


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