Under Pressure Directions: Go to https.//phet.colorad Objectives Click the BIG R
ID: 2304193 • Letter: U
Question
Under Pressure Directions: Go to https.//phet.colorad Objectives Click the BIG RED S tank of liquid. To determine how atmospheric pressure affects pressure readings in a . To establish a mathematical relationship that allows one to determine the pressure in a liquid. To describe the changes which occur in a liquid when pressure is applied to a liquid. . 1. Explore the simulation my moving the pressure gauge to find out how pressure changes in air and water Describe your findings and include specific data from your explorations to support your ideas 2. Add another gauge to compare the pressure at sea level to the bottom of the pool. Is this consistent with your observations in part 1? 3. How would your values compare if this pool of water was at a higher elevation in Denver? To answer this question, try dropping gravity a bit and notice what happens. Can you explain your results?
Explanation / Answer
1. The pressure change for air does not vary as much it does for water, for the same change in height. Conclusion, air is much less dense than water.
Pressure change from top of water level to bottom of tank: 101.5 to 116 kPa
Pressure change from the top of the screen to top of water level: 101.3 to 101.7 kPa
2. The pressure change is approximately 14.5 kPa. Yes, this is consistent with the observations in part 1.
3. At g=7 meter per second squared, not only have the pressures measured in 2 decreased, their difference has decreased as well. The pressure difference is therefore not linear to g.
4. The values are now drastically different, this is because atmospheric pressure has suddenly disappeared.
5. The shape of the the pool has had no effect over the pressure at the bottom of it.
6. The pressure at bottom linearly increases/decreases with increase/decrease in density of liquid.
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