PHYSICS OF MATTER (PART 2)

Young's modulus is defined as

• strain/stress

• stress/strain

• stress x strain

• length/area

Which of the following statement is NOT TRUE about FLUID?

• Fluid includes both liquid and gas phases

• Fluid is substance that can flow

• Fluid conforms to the boundaries of any container.

• Fluid refers to liquid only

The SI unit for absolute pressure is

• N m^-1

• N m

• N m^-2

• Joule

P_absolute or the total pressure is equals to

• P_atm - ρgh

• ρgh - P_atm

• P_atm + ρgh

• ρgh

Which is NOT TRUE about gauge pressure?

• The extra pressure at a depth h in a fluid that is due to the weight of the fluid above

• Also the hydrostatic pressure

• Difference between the hydrostatic pressure and atmospheric pressure.

• Difference between the absolute pressure and atmospheric pressure.

Which of the following is the characteristic of turbulent flow?

• Flow is steady and smooth

• Streamlines never cross and are closer together in regions of greater fluid velocity.

• Follows smooth path

• whirlpool-like circles

Which of the following is NOT TRUE about this equation?
A₁v₁ = A₂v₂

• Continuity principle

• Applies conservation of mass

• Av = volume flow rate

• Applies conservation of energy

According to the Bernoulli's principle, where the velocity of the fluid is ______, the pressure is _______.

• high ; high

• low ; low

• high ; low

• high ; remain

Which of the following is the TRUE statement?

• When depth, h increases, pressure P decreases.

• The pressure is same at all points having the same depth.

• At same level of depth, different shape has different pressure.

• None of the answers

The maximum velocity of an object moving in viscous fluid when the resultant force acting on the object is zero.

• continuity principle

• Bernoulli's principle

• terminal velocity

• instantaneous velocity