Tag: pressure in liquids

Questions Related to pressure in liquids

The most characteristic property of a liquid is :

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. elasticity

  2. fluidity

  3. formless

  4. volume conservation

Show answer
Correct Option: D
Explanation:

a liquid is  substance that flows freely but is of constant volume, having a consistency like that of water or oil.
The most characteristic feature is volume conserrvation.

A block of wood floats separately in river water and then in ocean water. Then the weight of the displaced river water is

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. equal to the weight of the displaced ocean water.

  2. less than the weight of the displaced ocean water.

  3. more than the weight of the displaced ocean water.

  4. not dependent on the density of the wooden block.

Show answer
Correct Option: A

The pressure exerted by liquid on container 

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. increases with depth

  2. decreases with depth

  3. remains unchanged with depth

  4. none of the above

Show answer
Correct Option: A
Explanation:

$\because p = h\times d\times d$
where, p = pressure
             h = depth
             d = density
so when depth is increases pressure is also increases.

The fluids in a confined space exert pressure in which direction?

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. Upward

  2. Downward

  3. Forward

  4. All directions

Show answer
Correct Option: D
Explanation:

Pascal's law or the principle of transmission of fluid-pressure is a principle in fluid mechanics that states that pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid such that the pressure variations (initial differences) remain the same.

so option ( D) would be correct

Fill in the blank.

Liquids exerts pressure in _______ directions.

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. One

  2. Two

  3. All

  4. It do not extent any pressure

Show answer
Correct Option: C
Explanation:

Like solids fluids (liquids and gases) also exent pressure. A solid exent pressure only in the downward direction due to its weight, whereas liquids and gases exent pressure on the walls of their container.

If a sweet water fish enters a sea, the fish will

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. swell

  2. be squeezed

  3. remain as it is

  4. suffer none of these

Show answer
Correct Option: B
Explanation:

Liquid pressure is given by =$\rho \times g \times h$

The water from river has a lower density than the sea water. So, at equal depth, sweet water or river water exerts less pressure than sea water. Body of a sweet water fish is habituated with this lower pressure of river water. Naturally, when the fish will enter the sea, it will suffer greater pressure due to increase in density and hence the body of the fish will be squeezed slightly.

There are two fish tanks each of depth $0.5 m$. Base area of one is $0.5m^2$ and that of another is $0.1m^2$. At the depth of which tank will a fish feel larger pressure?

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. The tank of wider base area

  2. The tank of smaller base area

  3. Equal for both tanks

  4. Can't say

Show answer
Correct Option: C
Explanation:

Liquid pressure is given by =$ \rho \times g \times h$
Liquid pressure depends on the depth and not on surface area. Both the tanks have the same depth. So, for both the tanks, the fish will feel equal pressure.

Fluids are
physics forces and matter pressure in fluids pressure in liquids introduction to pressure
  1. The substances which are lighter than air.
  2. The substances which let substances float on them.
  3. The substances which can flow easily.

  4. Liquids.

Show answer
Correct Option: C
Explanation:

A fluid is a substance such as liquid or gas which can flow easily, has no fixed shape and can changes its shape at a steady rate when acted upon by a force tending to change its shape.

If a sea fish enters a river, the fish will

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. swell

  2. be squeezed

  3. remain as it is

  4. suffer none of these

Show answer
Correct Option: A
Explanation:

Density of sea water is more than that of river water. So, at same depth, sea water exerts greater pressure. And, the body of the sea fish is habituated with the high pressure from outside. Now, as the same fish enters the river, water density being low, will suffer less pressure from outside. As a result, the body of the fish will swell out slightly.

Pressure exerted at a point in a liquid is 

physics forces and matter pressure in fluids pressure in liquids introduction to pressure

  1. scaler

  2. vector

  3. teasor

  4. none

Show answer
Correct Option: A
Explanation:

Pressure exerted at a point in a liquid is equal in magnitude in all directions, hence it is scalar.