A given shaped glass tube having uniform cross section is filled with water and is mounted on a rotatable shaft as shown in figure. If the tube is rotated with a constant angular velocity  ω when

• water levels in both sections A and B go up

• water level in section A goes up and that in B comes down

• water level in section A comes down and that in B it goes up

• water levels remain same in both sections

Assertion:  Specific gravity of a fluid is a dimensionless quantity

Reason: : It is the ratio of density of fluid to the density of water.

• If both assertion and reason are true and reason is the correct explanation of assertion 

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

143.

Assertion: For Reynold number R_e > 2000, the flow of fluid is turbulent. 

Reason: Inertial forces are dominant compared to the
viscous forces at such high Reynold numbers.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

A sphere of mass Mand radius R is falling in a viscous fluid. The terminal velocity attained by the falling object will be proportional to

• R²

• R

• 1/R

• 1/R²

The old age arteries carrying blood in the human body become barrow resulting in an increase in blood pressure. This follows from

• Pascal's law

• Stoke's law

• Bernoulli's principle

• Archimedes principle

Assertion: Smaller drops of liquid resist deforming forces better than the larger drops. 

Reason: Excess pressure inside a drop is directly proportional to its surface area

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If assertion is true but reason is false

Bernoulli's equation is a consequence of conservation of

• energy

• linear momentum

• angular momentum

• mass

Two small drops of mercury, each of radius R, coalesce to form a single large drop. The ratio of the total surface energies  before and after  change is

• 1 : 2^1/3

• 2^1/3 : 1

• 2 : 1

• 1 : 2

Scent sprayer is based on

• Charle's law

• Archimedes principle

• Boyle's law

• Bernoulli's theorem

The property utilized in the manufacture of lead shots is

• specific weight of liquid lead

• compressibility of liquid lead

• specific gravity of liquid lead

• surface tension of liquid lead