❤️❤️This question carries 3 marks. class 11 cbse❤️❤️
Answers
Answer:
Reason of 2)-
When we put our finger in running water the water moves from the side of our fingers because the water molecules have attraction power between them.
Reason of 1)-
Blood pressure is the pressure exerted by the column of blood and the blood vessels. Blood pressure depends on the force at which heart pumps the blood.
The pressure of liquid is given by :
P = hdg
where h =height of liquid
column (blood in this case)
d = density of the liquid
get = Acceleration due to gravity
Hence we can say that height of blood column at feet is more than it is at brain and also at the feet the blood has to be pumped to the heart against the force of gravity and has to travel a greater distance then at the brain. So we can conclude, by saying that ``The blood pressure in humans is greater at the feet than at the brain``