Viscosity and the Effects of Temperature - Section 8.1 Quiz
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When a burner injects a flame into the mouth of a hot air balloon, what happens?
The heat increases the temperature of the air inside and it expands - less dense air rises
The flame creates an area of low pressure inside the balloon so that air rushes upward through the balloon to balance the pressure
The flame heats the fabric of the balloon itself and causes it to become rigid so that it can suck air up into it
The flame creates a whirlwind inside the balloon that spirals upward and lifts the balloon through a turbine effect
In terms of liquids, viscosity increases as _______ decreases.
temperature
pressure
density
flow rate
Rate the following fluids in order from lowest viscosity to highest viscosity:
Hot air Ketchup Milk Cold air
Ketchup>milk>cold air>hot air
Hot air>cold air>milk>ketchup
Ketchup>milk>hot air>cold air
Cold air>hot air>milk>ketchup
Which statement about temperature and gasses is true?
As the temperature of a gas increases, its viscosity increases as well
As the temperature of a gas increases, its internal friction decreases
As gas particles slow down, they come closer together and collide more often
As heat is applied to a gas, friction decreases as the particles slide past one another more easily
As a liquid is cooled
its flow rate will decrease.
its viscosity will increase.
its density will decrease.
its particles will move further apart.
Engineers who design large pipes to carry raw bitumen (thick and heavy tar) to upgraders must consider the properties of fluids. Which choice is least likely to affect the flow of bitumen?
Thickness of the pipe metal
Pipe diameter
Temperature of the bitumen (or surrounding air it must pass through)
Slopes through which the pipes must pass
How could you measure the flow rate of various liquids?
Pour them down an incline and time how long it takes each one to reach the bottom
Burn each sample to create a deposit than can be analyzed
Place them in a beaker and see which one floats to the top
Place each one on a scale and measure its weight versus its volume
Which word best sums up the nature of viscosity?
Resistance
Velocity
Mass
Pressure
A technician wants to transport nitrogen gas through a series of small pipes in an experiment. He wants to maximize the flow rate of the nitrogen through the small pipes, so he should
cool the gas down as much as possible.
heat the gas up as much as possible.
mix the gas with a liquid so that it will be more viscous.
place the pipes in a downward angle to increase the flow rate.
Which fluid at room temperature would have the most interaction between its particles?
