Explain why
Hydrostatic pressure is a scalar quantity even though pressure is force dividing by area.

Glomerular hydrostatic pressure is present in

Explain why gravitational force is called a centre force ?

Explain why The blood pressure in humans is greater at the feet than at the brain.

[A] : Hydrostatic pressure in blood forces wa- ter and other solutes of glomerulus into Bowman s capsule. [R]: Kidneys regulate the blood pH.

At a depth of 1000m in an ocean (a) What is the absolute pressure? (b) what is the gauge pressure? (c ) find the force acting on the window of area 20cm times 20 cm of a submarine at this depth, the interior of which is maintained at sea level atmospheric pressure. the density of sea water is 1.03 times 10^3 kg m^-3 . g=10 ms^-2

Explain why Atmospheric pressure at a height of about 6km decreases to nearly half to its value at the sea level, through the height of the atmospheric is more than 100 km.

Explain why Surface tension of a liquid is independent of the area of the surface.