Streamline flow is more likely for liquids with:
- AHigh density.
- ✓High viscosity.
- CLow density.
- DLow viscosity.
Answer: B.
View full solution →Question types
Mechanical Properties of Fluids question types
26 questions across 5 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.
26
Questions
5
Question groups
5
Question types
01
M.C.Q (1 Marks)
10 Q→021 Marks Question
2 Q→032 Marks Questions
1 Q→043 Marks Question
5 Q→055 Marks Questions
8 Q→Sample Questions
Mechanical Properties of Fluids questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
A tall cylinder is filled with viscous oil. A round pebble is dropped from the top with zero initial velocity. From the plot shown in indicate the one that represents the velocity $(v)$ of the pebble as a function of time $(t):$
- A
- B
- ✓
- D
Answer: C.
View full solution →Pressure is a scalar quantity because:
- Ait is the ratio of force to area and both force and area are vectors.
- BIt is the ratio of the magnitude of the force to area.
- ✓It is the ratio of the component of the force normal to the area.
- DIt does not depend on the size of the area chosen.
Answer: C.
View full solution →An ideal fluid flows through a pipe of circular cross-section made of two sections with diameters 2.5cm and 3.75cm. The ratio of the velocities in the two pipes is:
- ✓$9:4$
- B$3:2$
- C$\sqrt{3}:\sqrt{2}$
- D$\sqrt{2}:\sqrt{3}$
Answer: A.
View full solution →The angle of contact at the interface of water-glass is 0°, Ethylalcohol-glass is 0°, Mercury-glass is 140° and Methyliodideglass is 30°. A glass capillary is put in a trough containing one of these four liquids. It is observed that the meniscus is convex. The liquid in the trough is:
- AWater
- BEthylalcohol
- ✓Mercury
- DMethyliodide
Answer: C.
View full solution →This model of the atmosphere works for relatively small distances. Identify the underlying assumption that limits the model.
Is surface tension a vector?
Is viscosity a vector?
Iceberg floats in water with part of it submerged. What is the fraction of the volume of iceberg submerged if the density of ice is $\rho_\text{i}=0.917\text{g cm}^{-3}?$
View full solution →Considering the pressure p to be proportional to the density, find the pressure p at a height h if the pressure on the surface of the earth is $p_0$.
View full solution →The sap in trees, which consists mainly of water in summer, rises in a system of capillaries of radius $r = 2.5 \times 10^{-5}m$. The surface tension of sap is $T = 7.28 \times 10^{-2}N m^{-1}$ and the angle of contact is $0°$. Does surface tension alone account for the supply of water to the top of all trees?
View full solution →The sufrace tension and vapour pressure of water at 20°C is $7.28 \times 10^{-2}N$ $m^{-1}$ and $2.33 \times 10^3$ Pa, respectively. What is the radius of the smallest spherical water droplet which can form without evaporating at 20°C?
View full solution →Pressure decreases as one ascends the atmosphere. If the density of air is $\rho,$ what is the change in pressure dp over a differential height dh?
View full solution →Considering the pressure p to be proportional to the density, find the pressure p at a height h if the pressure on the surface of the earth is $p_0$.
View full solution →A vessel filled with water is kept on a weighing pan and the scale adjusted to zero. A block of mass $M$ and density $\rho$ is suspended by a massless spring of spring constant $k$. This block is submerged inside into the water in the vessel. What is the reading of the scale?
View full solution →Two mercury droplets of radii $0.1cm$. and $0.2cm$. collapse into one single drop. What amount of energy is released? The surface tension of mercury $T = 435.5 \times 10^{-3}N m^{-1}$
View full solution →A cubical block of density $\rho$ iis floating on the surface of water. Out of its height L, fraction x is submerged in water. The vessel is in an elevator accelerating upward with acceleration a . What is the fraction immersed?
View full solution →The free surface of oil in a tanker, at rest, is horizontal. If the tanker starts accelerating the free surface will be titled by an angle $\theta.$ If the acceleration is a m $s^{-2}$, what will be the slope of the free surface?
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