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WorksheetsPHY 18 Fluids
Total questions: 20
Worksheet time: 15mins
Why does a hot air balloon float in air?
Air is less dense than water.
The density of hot air is less than the density of cold air.
Air is denser on cold days.
The overall density of the balloon and its basket is less than the density of the air.
What do we call the the amount of force exerted on a certain area?
fluid
pressure
buoyant force
normal force
The upward force exerted by a fluid is called the...
buoyant force
density force
fluidity force
normal force
Which principle do airplanes take advantage of to fly?
Archimedes' Principle
Bernoulli's Principle
Pascal's Principle
When a fluid fills a closed container, it exerts pressure
only on the bottom of the container
only on the sides of the container
only on particles within the fluid
everywhere inside the container
Which of the following factors affect the pressure at the bottom of a container of liquid?
depth of the container
width of the container
temperature of liquid
color of liquid
The study of properties of fluids in motion is called
Fluids Study
Fluids statics
Fluids dynamics
None
Turbulent flow is
Unsteady and regular
Steady and regular
Unsteady and irregular
Steady and regular
According to equation of continuity, A1V1 = A2V2 = constant. The constant is equal to:
Flow rate
Volume of fluid
Mass of fluid
Density of fluid
Velocity of fluid increases where the pressure is:
Low
High
Constant
zero
In equation of continuity, the units of Av is given as:
Cubic meter
Cubic meter per second
Square meter per second
Square meter per square second
Bernoulli’s equation is obtained by applying law of conservation of.
Mass
Energy
Momentum
Force
If cross-sectional area of pipe decreases, the speed of fluid must increase according to:
Continuity equation
Bernoulli's equation
Torricelli's theorem
Venture relation
High viscosity can be described as...
a liquid that flows quickly
a liquid that flows slowly
