Advertisements
Advertisements
Question
Explain why The blood pressure in humans is greater at the feet than at the brain
Advertisements
Solution 1
The height of the blood column is more for the feet as compared to that for the brain. Consequently, the blood pressure in humans is greater at the feet than at the brain.
Solution 2
The pressure of a liquid is given by the relation:
P = hρg
Where,
P = Pressure
h = Height of the liquid column
ρ = Density of the liquid
g = Acceleration due to the gravity
It can be inferred that pressure is directly proportional to height. Hence, the blood pressure in human vessels depends on the height of the blood column in the body. The height of the blood column is more at the feet than it is at the brain. Hence, the blood pressure at the feet is more than it is at the brain.
APPEARS IN
RELATED QUESTIONS
It is easier to hammer a blunt nail into a piece of wood than a sharply pointed nail.
Water in a lake exerts pressure only at its bottom.
The unit of pressure is
Why is the bottom part of the foundation of a building made wider?
Find the area of a body which experiences a pressure of 50000 Pa by a thrust of 100 N?
The figure shows a brick of weight 2 kgf and dimensions 20 cm × 10 cm × 5 cm placed in three different positions on the ground. Find the pressure exerted by the brick in each case.
If someone presses a pointed needle against your skin, you are hurt. But if someone presses a rod against your skin with the same force, you easily tolerate. Explain.
A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out, the pressure in the liquid near the bottom of the liquid will
An empty plastic bottle closed with an airtight stopper is pushed down into a bucket filled with water. As the bottle is pushed down, there is an increasing force on the bottom. This is because
Match the following.
| 1. | Density | hρg |
| 2. | 1 gwt | Milk |
| 3. | Pascal’s law | `"Mass"/" Volume"` |
| 4. | Pressure exerted by a fluid | Pressure |
| 5. | Lactometer | 980 dyne |
A brick is kept in three different ways on a table as shown in the following figure. The pressure exerted by the brick on the table will be
 |
 |
 |
| A | B | C |
If the same force is made to act on a larger area, the pressure ______.
Analogy
Broader straps: ______:: Thin needles: ______.
What is thrust?
Cooking in a place located at a higher altitude is difficult. Why?
Give reasons why:
heavy trucks are fitted with 6 to 8 wheels
The shape and size of the solids do not easily change.
Upthrust = weight of the fluid displaced – apparent weight of the object.
The force exerted by liquid perpendicular to the surface of the body is equal to the product of ______ at that point.
