Clouds float in atmosphere because of their low

(a)

density

(b)

pressure

(c)

velocity

(d)

mass

In a fluid, buoyant force exists because pressure at the ____________ of an object is greater than the pressure at the top.

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bottom

The instrument used to measure atmospheric pressure is _____________.

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Barometer

A drinking straw works on the existence of _________.

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Atmosphere pressure

The weight of fluid displaced determines the buoyant force on an object.

(a) True

(b) False

The shape of an object helps to determine whether the object will float.

(a) True

(b) False

Archimede's principle can also be applied to gases.

(a) True

(b) False

Hydraulic press is used in the extraction of oil from oil seeds.

(a) True

(b) False

Density

(1)

Pressure

1 gwt

(2)

\(\frac { Mass }{ volume }\)

Pascal’s law

(3)

980 dyne

Pressure exerted by a fluid

(4)

hpg

Lactometer

(5)

Milk

On what factors the pressure exerted by the liquid depends on?

Why it is easy to swim in river water than in sea water?

State Pascal’s law.

The density of water is 1g cm^–3. What is its density in S.I. units?

State the laws of flotation.