Question

Kriti has 20 coins that make up a total of ₹ 41 in the denomination of 1-rupee, 2-rupee, and 555-rupee coins.

The number of 2-rupee coins are three times the number of 5-rupee coins.

How many 1-rupee coins does Kriti have?

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Answer 1

Answer:

(a) we know,

P =dgh where, h is dpeth , g is accⁿ due to gravity and d is density of liquid .

Therefore , pressure increases, when depth increases . so, the blood pressure in humans is greater at the feet than the brain .

(B) The density of air is maximum at the surface of the earth and decrease rapidly with height. At height of 6 km , the density of air decreases nearly half of its value at the sea level. Beyond 6km height , the density of air decreases very slowly with height .hence, the atmosphere pressure at the height of about 6km decreases to nearly half of its value at the sea level .

(c) according to Pascal's law,

Pressure is transmitted equally in all directions inside the liquid. it means hydraulic pressure has no fixed direction . so, it's scalar quantity.