Mechanical Properties of Fluids Test

Result

Mechanical Properties of Fluids Test - 6

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Question 1
1 / -0

It is easier to spray water to which soap is added, because

A
Addition of soap to water decreases surface tension of water

B
Addition of soap to water increases surface tension of water

C
Addition of soap to water makes surface tension of water zero

D
Addition of soap to water increases its density

Solution

Addition of soap decreases the surface tension of water , as we know the energy of spraying is directly proportional to the surface tension .
Question 2
1 / -0

A capillary tube remains dipped in a water container, so that loss in weight of the capillary tube is

A
equal to the upward buoyant force

B
more than the upward buoyant force

C
less than the upward buoyant force

D
half of the buoyant force

Solution

This is archimedes principle when an object submerged in a liquid its weight is equal to the Buoyant force.
Question 3
1 / -0

The unit of surface tension in S.I units is given by

A
Newtons per meter²

B
dynes per cm²

C
Newtons per meter

D
dynes per cm

Solution

surface tension is measured in force per unit length. The S.I unit is newton per meter but the CGS unit dyne per centimeter is also used.
Question 4
1 / -0

Two match sticks are laid side by side on the surface of water. When a drop of light oil on the end of a third match stick is touched to the surface film between the two floating sticks, the two match sticks

A
will move apart rapidly

B
will be joined

C
will remain as they are

D
will come closer

Solution

They will move apart rapidly because surface tension of oil is lesser than that of water.