Question

3. Long answer type questions.
a) How we can measure the mass of a body by using beam balance?
b) Explain about the devices used for measuring time?

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Answer 1

Answer:

Hope it helps you

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Explanation:

a) Use of Beam Balance: Common balance is used to find unknown mass by using known standard masses. By adjusting levelling screw the plumb line is brought just above the pointed projection on the balance. The beam is raised using the lever and checked that the pointer swings equally on either side of the zero mark.

b) An instrument used to measure time is called a clock. People used instruments such as sundials and hourglass to keep track of time. ... An instrument known as water clock was also used in different parts of the world. It worked on the principle of regulated flow of water

Answer 2

Answer:

equter in side eefort in middle friction in last