Question

Give reasons:
[a] Sparks are produced when a pair of scissors is sharpened against a
grinding wheel.
[b] Powder is applied to a carrom board
[c] Trucks and buses generally have double wheels at the back
[d] Wheels of car are made circular​

Answer 1

Answer:

sorry I didn't know..............

Answer 2

Hey here is ur answer....

{a}Sparks are produced when a pair of scissors is sharpened against agrinding wheel because the rusted and rough particles we're occur when we use scissors those particles are produced when we sharpen it.

{b} Powder is applied to a carom board because powder removes roughness and gives friction.

{c} Trucks and buses generally have double wheels at the back because truck weighs more weight in backside for balancing that weight trucks has double wheels.

{d} Wheels of car are made circular because cars or any vehicles does not move without wheels. Wheels are made only with circular shape..

I hope it will helps you.....

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