A liquid can easily change its shape but a solid can not because:

 1 the density of a liquid is smaller than that of a solid. 2 the forces between the molecules is stronger in solid than in liquids. 3 the atoms combine to form bigger molecules in a solid. 4 the average separation between the molecules is larger in solids.

Subtopic:  Properties of Fluids |
91%
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Consider the equations
$$P=\operatorname{Lim}_{\Delta s \rightarrow 0} \frac{F}{\Delta S} \text { and } P_{1}-P_{2}=\rho g z .$$
In an elevator accelerating upward

1. both the equations are valid

2. the first is valid but not the second

3. the second is valid but not the first

4. both are invalid

Subtopic:  Pressure |
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The three vessels shown in the figure have the same base area. Equal volumes of a liquid are poured in the three vessels. The force on the base will be:

 A B C

 1 maximum in vessel A 2 maximum in vessel B 3 maximum in vessel C 4 equal in all the vessels
Subtopic:  Pressure |
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Equal mass of three liquids are kept in three identical cylindrical vessels $$A$$$$B$$ and $$C$$. The densities are $$\rho_A,~\rho_B,~\rho_C$$ with $$\rho_A<\rho_B<\rho_C$$ . The force on the base will be:

 1 maximum in vessel $$A$$ 2 maximum in vessel $$B$$ 3 maximum in vessel $$C$$ 4 equal in all the vessels

Subtopic:  Pressure |
58%
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The figure shows a siphon. The liquid shown is water. The pressure difference PB – PA between the points A and B is

1. 400 N m–2

2. 3000 N m–2

3. 1000 N m–2

4. zero

Subtopic:  Pressure |
61%
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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:

 1 increase 2 decrease 3 remain constant 4 first decrease and then increase
Subtopic:  Pressure |
60%
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The pressure in a liquid at two points in the same horizontal plane are equal. Consider an elevator accelerating upward and a car accelerating on a horizontal road. The above statement is correct in

1. the car only

2. the elevator only

3. both of them

4. neither of them

Subtopic:  Pressure |
51%
From NCERT
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Suppose the pressure at the surface of mercury in a barometer tube is P1 and the pressure at the surface of mercury in the cup is P2.

1. P1 = 0, P2 = atmospheric pressure

2. P1 = atmospheric pressure, P2 = 0

3. P1 = P2 = atmospheric pressure

4. P1 = P2 = 0

Subtopic:  Pressure |
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A barometer kept in an elevator reads 76 cm when it is at rest. If the elevator goes up with increasing speed, the reading will be

1. zero

2. 76 cm

3. < 76 cm

4. > 76 cm

Subtopic:  Pressure |
57%
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A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is

1. zero

2. 76 cm

3. < 76 cm

4. > 76 cm

Subtopic:  Pressure |
51%
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