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# Tripple science pressure

Extracts from this document...

Introduction

Andy Tat

CDA

Experiment aim:  Show how pressure changes with temperature when the volume is constant.

 Temperature (k) Pressure Try 1 (KPA) Try 2 (KPA) Average (KPA) 277 -14 -12 -13 297 -6 -6 -6 317 0 0 0 337 5 5 5 357 12 10 11 373 18 15 16.5

Predicting effect of

Middle

Ice

Boss clamp

clamp stand

Heatproof mat

How we did it

1. First we set up all of the equipment
2. Secondly we put ice into the beaker and we checked the temperature of the water and the pressure when the Bunsen burner was off.
3. We then turned the Bunsen burner on and checked the temperature at every 20(k).
4. we repeated this to make the test reliable and valid, then we take the average of both sets of results.
5. Due to water boils at 100°C and it doesn't got higher so we had to stop the temperature at 100°C which is 373K

There seemed to be a  constant pattern between the 2 sets of data, The pressure rises the same amount each time the temperature raised . In the graph you can see that the two sets or results i have collect are very similar meaning there are less gap for mistakes, while looking at the results i can predict that the higher the volume the higher the pressure.

The results

Evaluation

In conclusion I think that the pressure and temperature did have change throughout the test, the pressure was

Conclusion

Eventually, the balloon will reach a maximum altitude. What will happen is the pressure inside will about equal the pressure outside. When the two pressures are equal, this is called equilibrium. At this point, the balloon weighs as much as the air its displacing, or you might say the upward force on the balloon due to the pressure difference (between the top and bottom of the balloon) is equal to the force due to gravity acting on the balloon, therefore the net force is zero and the balloon just hovers there.

However by using the burner on the Hot Air balloon it can cause pollution which is now a treat to our environment, The technology to replace hot air balloons would to use the wind whilst you are high up where there are a lot of high speed winds which can generate energy.

References:

http://www.engineeringtoolbox.com/air-altitude-pressure-d_462.html

http://science.howstuffworks.com/hot-air-balloon7.htm

http://en.allexperts.com/q/Physics-1358/2009/1/improvised-hot-air-ballon.htm

http://www.physics.sc.edu/~rjones/phys101/balloons.html

http://www.kids-online-games.com/experiments/hot_air_balloon_science_project_.htm

http://www.suite101.com/reference/hot_air_balloon_physics

http://www.hotairballoons.com/hotairballoon-air-pressure.asp

http://science.howstuffworks.com/hot-air-balloon.htm

This student written piece of work is one of many that can be found in our GCSE Forces and Motion section.

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