Pressure & Fluid Dynamics Quiz

                                                Name _________________

Date _________

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           Approaching                                               Proficient                                               Advanced

Draw & Label the differences in the molecules of gas under high pressure and low pressure in a confined space. 3

           LOW                            HIGH

Explain what happens to the temperature inside the container of gas when high pressure is applied. And Why. 4

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Tires on airplanes must endure very high pressures on landings. What design characteristics must be applied so that they last through repeated landings?  5

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Label each diagram with the correct gas Law.  3

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State the two Gas Laws and give an example of each. 4

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Describe the similarity in how gravity causes lighter than air balloon flight, and the balloon’s response to acceleration inside an accelerating vehicle. 5

 

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What are the SI measurements for both the space that an object fills, and the amount of matter filling that space? 3 (+ 1 pt. If you can give the units of both.)

 

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What would happen to the level of Mercury in a barometer if the barometer is moved downwards in elevation? Explain why! 4

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How much force must have been applied if that force was pushing on 7.5 m2 and the pressure was 25.5 Pa? (show the formula, math, and units for full credit)  5

Sounds travels best in what medium? 3 (circle the correct one)

Solid                  Liquid                    Gas

Explain how the density of the medium affects sound. 4

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Explain why it is necessary to get the air in a soda can steaming hot before it implodes from dunking in water. 5

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Explain what causes a hot air balloon to rise. 3

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A helium balloon is inflated the night before a parade. The weather report for the next day says it will be 150 warmer. Explain how this affects the balloon’s inflation. 4

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You are filling a balloon with Hydrogen instead of Helium before a parade. You want the same buoyancy in your balloon as Helium. Explain how this affects the inflation.  5

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What does this graph from the gas lab show? 3

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Why was there a shallow curve at the bottom of the graph rather than a sharp “V shape? 4

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Explain what is happening to the temperature inside the syringe throughout the lab. 5

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State Pascal’s Principle.  3

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How does Pascal’s Principle enable small input forces to create large output forces? Draw, Label, & explain 4

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Using Pascal’s Principle, Draw, label, and explain how a hydraulic lift can have an input of only 1.5 Newtons of force, and create 7.5 Newtons of output force. 5

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State Bernoulli’s Principle.  3

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How does Bernoulli’s Principle create lift?. Draw, Label, & explain 4

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Using Bernoulli’s Principle, Draw and explain how a hydrofoil can help decrease hull drag, thus increasing the efficiency in sea travel. 5

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