Noun
pressure (countable and uncountable; plural: pressures)- (physics) The amount of force that is applied over a given area divided by the size of this area.
- :Units
- :*SI: pascal (Pa) (1 pascal equals 1 newton per square metre)
- :*Others: bar (1 bar equals 100000 pascals), barye (Ba) (1 barye equals 0.1 pascal), pounds per square inch (psi, lbf/in2, lb/in2), torr, mmHg, atmosphere (atm)
- mental strain caused by one's own or others' expectations on one's own performance
- :She has been under pressure lately because her boss expects her to get the job done two weeks early.
Read full definition at wiktionary.org
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Definition
Pressure is an effect which occurs when a force is applied on a surface. Pressure is the amount of force acting on a unit area. The symbol of pressure is P.Note the upper case P is also used for power. Read full entryThis entry is from Wikipedia,the leading user-contributed encyclopedia.It may not have been reviewed by professional editors(See full disclaimer)
- 1.Pressure - Wikipedia, the free encyclopedia
- This article is about pressure in the physical sciences. For the psychological meaning, see Peer pressure. For the Billy Joel song, see Pressure (Billy Joel song) ...
- http://en.wikipedia.org/wiki/P
ressure
- 2.pressure: Definition, Synonyms from Answers.com
- pressure n. The act of pressing. The condition of being pressed. ... Atmospheric pressure. ... Pressure is the ratio of force to the surface area over which it ...
- http://www.answers.com/topic/p
ressure
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pressure...?
A scientist builds a pressure
thermometer by sealing air in
a tank. If the pressure inside
the tank is 945.6 mmHg when it
is placed in a hot water bath
at 92oC, and 653.0 mmHg when
left on the ground outside the
laboratory, what is the
Celsius temperature outside
the lab?
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T1/P1 =T2/P2 T2 =( T1/P1) x P2, T1=273 +92 = 365 K, P1= 945.6 mmHg P2 = 653.0 mmHg T2 = (365/945.6)x653.0 = 252.1 K t2= 252.1 -273 = -20.9 oC |
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How much pressure is due to The vapor pressure of water at
21 degrees Celsius is 19 mmHg.
If 100ml of oxygen is
collected over water at 21
degrees Celsius and 730 mmHg
total pressure, how much
pressure is due to water vapor
and how much to the pressure
of oxygen?
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The total pressure is simply the sum of all the partial pressures inside the system. 730mmHg = 19mmHg (from water) + 711 mmHg (from oxygen). |
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What physically causes gas Also, I have a few other
questions that I would like
answered too :) Thanks for all
your help.
1. How do temperatures in
Celsius and Kelvin differ in
their relationship with
pressure?
2. How do you write an
equation to express the
relationship between pressure
and temperature (K). Use
symbols P, T, and c.
3. What should happen to the
pressure of gas if Kelvin is
doubled?
4. What shoul be the pressure
at "absolute zero"
Thanks!
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the gas law you can use is P1 * V1 = P2 * V2 T1 T2 (that's divided by) you can increase gas pressure by reducing the volume which the gas occupies (P1 *V1 = P2 * V2 of the same gas) while the temperature remains the same and also by reducing the temperature, while the volume remains the same this temperature (T1 and T2) is ALWAYS measured in Kelvins, so if you were to use degrees C, you have to add 273 to the figure to make it into Kelvins. I hope that answers no 2 if the temperature is doubled then it follows that the Pressure will also double (if the volume is kept the same) so that the equation written previously to be proven. I HOPE THAT HELPS! |
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