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MHT-CET Mechanical Properties of Fluids — practice questions — page 2

Explore 81 free Mechanical Properties of Fluids questions in MHT-CET Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Mechanical Properties of Fluids questions and exercises with answers

Showing questions 31–60 of 81.

Surface energy exists at an interface where at least one substance must be what?Read the answer and worked solution →Compared with the outside, the pressure inside a spherical liquid drop is what?Read the answer and worked solution →A soap bubble of radius 1 cm and surface tension 0.03 N/m has what excess pressure?Read the answer and worked solution →Why does a soap bubble have a larger excess pressure than a drop of equal size?Read the answer and worked solution →The angle of contact is measured between which two lines?Read the answer and worked solution →What is the angle of contact of mercury with glass like?Read the answer and worked solution →When the angle of contact is acute, the liquid does what to the solid?Read the answer and worked solution →Detergents added to water have what effect on the angle of contact?Read the answer and worked solution →The word capilla, from which capillary comes, means what in Latin?Read the answer and worked solution →A water column of 0.07 N/m, zero contact angle, in a 0.5 mm radius tube rises how high? Take g = 10 m/s^2.Read the answer and worked solution →If a capillary tube's radius is halved, the water rise becomes how many times?Read the answer and worked solution →Why is blood pressure greater at the feet than at the brain?Read the answer and worked solution →At about 6 km height, atmospheric pressure drops to nearly what fraction of sea level value?Read the answer and worked solution →The relation P = Pa + rho g h is exact for which kind of fluid?Read the answer and worked solution →In a steady flow, which quantity stays constant along a streamline, per Bernoulli?Read the answer and worked solution →Layers of a viscous liquid sliding over one another resemble what?Read the answer and worked solution →What is the shear modulus of any fluid?Read the answer and worked solution →Which common unit of pressure is equal to one newton per square metre?Read the answer and worked solution →The bar, a unit used for gas pressure, equals how many N m-2?Read the answer and worked solution →One hectapascal (hPa) is equal to how many pascal?Read the answer and worked solution →One torr of pressure corresponds to a column of mercury how high?Read the answer and worked solution →A force of 10 N acts on an area of 1 cm2. What pressure results?Read the answer and worked solution →The pressure due to a fluid at rest at a given depth does not depend on which quantity?Read the answer and worked solution →Force of attraction between molecules of the same substance is called what?Read the answer and worked solution →Attraction between glass molecules and water molecules is an example of which force?Read the answer and worked solution →In which state of matter is the cohesive force strongest?Read the answer and worked solution →Intermolecular forces in solids and liquids act up to a distance of the order of what?Read the answer and worked solution →What is the sphere of influence of a molecule?Read the answer and worked solution →The surface film of a liquid has thickness equal to which quantity?Read the answer and worked solution →A free surface of a fluid is one that experiences which stress?Read the answer and worked solution →

Worked practice questions

Surface energy exists at an interface where at least one substance must be what?

  1. A solid
  2. A fluid
  3. A metal
  4. A gas only
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Correct answer: B. A fluid

Surface energy belongs to an interface between two substances, at least one of which is a fluid.

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Compared with the outside, the pressure inside a spherical liquid drop is what?

  1. Greater
  2. Smaller
  3. Equal
  4. Zero
Show answer and solution

Correct answer: A. Greater

Surface tension tries to shrink the drop, so the inside pressure must exceed the outside pressure to balance it.

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A soap bubble of radius 1 cm and surface tension 0.03 N/m has what excess pressure?

  1. 12 Pa
  2. 6 Pa
  3. 3 Pa
  4. 24 Pa
Show answer and solution

Correct answer: A. 12 Pa

A bubble has two surfaces, so excess pressure is 4S/r = 4 x 0.03 / 0.01 = 12 Pa.

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