alleryThe word capilla, from which capillary comes, means what in Latin?
- Pipe
- Hair
- Water
- Glass
Show answer and solution
Correct answer: B. Hair
Capilla is Latin for hair, which refers to the hair thin bore of a capillary tube.
CBSE Class 11 (Science) Mechanical Properties of Solids and Fluids — practice questions — page 9
Explore 257 free Mechanical Properties of Solids and Fluids questions in CBSE Class 11 (Science) Physics. Open each question or exercise to read its content, reference answers and available explanation.
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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 are the dimensions of Poisson's ratio for a stretched wire?Read the answer and worked solution →Within what range does Poisson's ratio lie for steels?Read the answer and worked solution →Which value is nearest to Poisson's ratio of aluminium alloys?Read the answer and worked solution →Why is stress not treated as a vector quantity even though force is?Read the answer and worked solution →For which states of matter is the bulk modulus meaningful?Read the answer and worked solution →A rubber-like elastomer is notable in elasticity because it does what?Read the answer and worked solution →Which elastic modulus is defined as the ratio of tensile stress to tensile strain?Read the answer and worked solution →A wire hangs from a ceiling with weight F at its end. What is the tensile stress at any cross-section of area A?Read the answer and worked solution →Which statement about Hooke's law for a metal wire is correct?Read the answer and worked solution →
Worked practice questions
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.
- 1.4 cm
- 5.6 cm
- 2.8 cm
- 0.7 cm
Show answer and solution
Correct answer: C. 2.8 cm
Height h = 2S cos(theta)/(rho g a) = 2 x 0.07 /(1000 x 10 x 0.0005) = 0.028 m, or 2.8 cm.
If a capillary tube's radius is halved, the water rise becomes how many times?
- Half
- Double
- Four times
- Unchanged
Show answer and solution
Correct answer: B. Double
Capillary rise is inversely proportional to the radius, so halving the radius doubles the height.
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