3 years ago

The black board appears black because:

Physics

1 answer:

marishachu [46]3 years ago

8 0

Answer:

I think its C All visible light wavelengths (ROYGBV) are absorbed by the board

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Pressure, $P=1.90\times 10^7\ Pa$

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It is given that,

Mass of the woman, m = 55 kg

Diameter of the circular cross section, d = 6 mm

Radius, r = 3 mm = 0.003 m

Let P is the pressure exerted on the floor. It is equal to the force acting on woman per unit area. It is given by :

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