Warmup 20: Pressure

Course

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The first three questions refer to the material you were to read in preparation for the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle. Questions 4 is your opportunity to suggest what we should emphasize today and how.

You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT button at the bottom of this page.


1.

The atmospheric pressure decreases with altitude exponentially according to the relation p = poe-(0.00012)h where h is the altitude above sea level in meteres and po= 1.013 x 105 N/m2.

The average atmospheric pressure in Florida is close to po. Estimate the average atmospheric pressure in Denver (The elevation at Denver is at about 1500 m.)



2.Estimate the force on a 1.5 m2 windshield as a 60 mph (30 m/s) wind blows over it. The air in the car is stationary and the car windows are shut tight.





3.

Water is pumped up a pipeline as shown. The water pours out at the top and to the ground. The pump is running at constant speed. Compare the water speed at the three points A, B, and C in the pipeline.

STATE YOUR REASONS FOR ALL THE ANSWERS.





4. Below is a space for your thoughts, including general comments about today's assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.):




You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT button.

I received no help from anyone on this assignment.