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Surface tension of liquids generally ....... with the temperature. (increases/decreases). 

Decreases.
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Fill in the blanks using the words from the list appended with each statement:

For the model of a plane in a wind tunnel turbulence occurs at a .................. speed than the critical speed for turbulence for an actual plane. (greater/smaller)

Greater.
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Fill in the blanks using the words from the list appended with each statement:

For solids with elastic modulus of rigidity, the shearing force is proportional to ............ while for fluids it is proportional to ............... (shear strain/rate of shear strain).


Shear strain
, rate of shear strain.
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Explain why?

The blood pressure in humans is greater at the feet than at the brain. 

The height column of blood is more at feet than at the brain. So, blood pressure is greater at feet than at the brain. 
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For a fluid in steady flow, the increase in flow speed at a constriction follows from .............while the decrease of pressure there follows from ................. (conservation of mass/Bernoulli's equation).

Conservation of mass,

Bernoulli's equation.

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