#1
Which of the following is an example of a fluid?
Water
ExplanationWater is a common example of a fluid.
#2
What causes buoyancy in fluids?
Gravity
ExplanationBuoyancy in fluids is caused by the gravitational force acting on the fluid.
#3
What happens to the pressure exerted by a fluid if the area over which it is exerted decreases?
Pressure increases
ExplanationWhen the area over which a fluid is exerted decreases, the pressure increases.
#4
What is the SI unit of force?
Newton (N)
ExplanationThe SI unit of force is Newton (N).
#5
What is the SI unit of pressure?
Pascal
ExplanationPascal is the SI unit of pressure.
#6
Which of the following represents Pascal's principle?
Pressure applied to a fluid is transmitted undiminished to every part of the fluid and to the walls of its container
ExplanationPascal's principle states that pressure applied to a fluid is transmitted undiminished to every part of the fluid and to the walls of its container.
#7
What is the effect of increasing the density of a fluid on pressure?
Increases pressure
ExplanationIncreasing the density of a fluid leads to an increase in pressure.
#8
Which factor affects fluid viscosity?
Temperature
ExplanationFluid viscosity is affected by temperature.
#9
What is the equation for calculating the force exerted by a fluid on a surface?
Force = Pressure / Area
ExplanationThe force exerted by a fluid on a surface is calculated using the formula: Force = Pressure / Area.
#10
Which property of a fluid causes it to resist flowing?
Viscosity
ExplanationViscosity is the property of a fluid that causes it to resist flowing.
#11
How does the pressure change with altitude in a fluid?
Pressure decreases with altitude
ExplanationIn a fluid, pressure decreases with increasing altitude.
#12
Which of the following factors affects the viscosity of a fluid?
Temperature
ExplanationViscosity of a fluid is affected by temperature.
#13
What happens to the pressure exerted by a fluid if its density decreases?
Pressure decreases
ExplanationIf the density of a fluid decreases, the pressure exerted by it also decreases.
#14
What is the relationship between pressure and volume in Boyle's law?
Pressure is inversely proportional to volume
ExplanationAccording to Boyle's law, pressure is inversely proportional to volume.
#15
What is the formula to calculate the density of a fluid?
Density = Mass / Volume
ExplanationDensity of a fluid is calculated using the formula: Density = Mass / Volume.
#16
What is the formula to calculate pressure?
Pressure = Force / Area
ExplanationPressure is calculated using the formula: Pressure = Force / Area.
#17
Which statement describes an example of Bernoulli's principle?
An increase in velocity of a fluid leads to a decrease in pressure
ExplanationBernoulli's principle states that an increase in the velocity of a fluid leads to a decrease in pressure.
#18
What is the equation for hydrostatic pressure?
P = ρgh
ExplanationThe equation for hydrostatic pressure is: P = ρgh.
#19
What is the principle behind the functioning of hydraulic systems?
Pascal's principle
ExplanationThe functioning of hydraulic systems is based on Pascal's principle.
#20
Which of the following statements about laminar flow is true?
It occurs at low velocities
ExplanationLaminar flow occurs at low velocities.
#21
What is the equation for calculating the hydrostatic pressure at a depth in a fluid?
P = ρgh
ExplanationThe equation for calculating hydrostatic pressure at a depth in a fluid is: P = ρgh.
#22
Which principle explains why an airplane wing generates lift?
Bernoulli's principle
ExplanationBernoulli's principle explains why an airplane wing generates lift.
#23
What is the SI unit of viscosity?
Pascal-second (Pa·s)
ExplanationThe SI unit of viscosity is Pascal-second (Pa·s).
#24
Which of the following is NOT a property of an ideal fluid?
Zero density
ExplanationZero density is not a property of an ideal fluid.
#25
Which principle explains why a balloon rises when filled with helium gas?
Archimedes' principle
ExplanationArchimedes' principle explains why a balloon rises when filled with helium gas.