Explain why (a) The blood pressure in humans is greater at the feet than at the brain (b) Atmospheric pressure at a height of about 6 km decreases to nearly half of its value at the sea level, though the height of the atmosphere is more than 100 km
Explain why (a) The blood pressure in humans is greater at the feet than at the brain (b) Atmospheric pressure at a height of about 6 km decreases to nearly half of its value at the sea level, though the height of the atmosphere is more than 100 km

Answer :

(a). The blood column in the legs is higher than the head, so the blood pressure in the legs is higher than the brain.

(b). The density of the atmosphere does not decrease linearly with increasing altitude, in fact most air molecules are near the surface. So there is this nonlinear variation in atmospheric pressure.