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April 21, 2014

# Search: pressure

Number of results: 9,630

Physical Science 9
Pressure. When you reduce the pressure over a liquid surface to below vapor pressure, it boils off. If you increase the pressure, it does not boil until a higher temperature (eg - pressure cooker). The pressure is high enough in the can to hold the contents in a liquid state, ...
Sunday, March 16, 2014 at 2:32pm by Damon

pressure
What you are calling the "liquid pressure" must be the pressure due to liquid above, which is also called the gauge pressure. It equals (density)*g*(depth) = 1000 kg/m^3*9.8*4.0 m = 3.92*10^4 Pa = 39.2 kPa Add atmospheric pressure to that for the absolute pressure, 140.2 kPa.
Friday, March 30, 2012 at 8:39am by drwls

Chemistry
The dry gas pressure is pressure inside the tube - watervapor pressure. The pressure has nothing to do with the volume collected, unless you are supporting a column of water, then you have to adjust barometric pressure for the height of the column, it does not appear you had ...
Wednesday, September 26, 2007 at 1:21pm by bobpursley

Chemistry....help
find the water vapor pressure from the temperature, and subtract that pressure from your observed pressure. At 25C, water vapor pressure is 23.8 mmHg (check that) so your observed pressure then was 757.5mmHg-23.8mmHg. Now, you have pressure and volume at that pressure, convert...
Tuesday, July 3, 2012 at 9:19am by bobpursley

physics
average pressure: air pressure doesn't count, because it is on both sides of the dam. avg pressure due to water: avg depth 14 m. Water of 7 m high generates a pressure of 7m*densitywater*g=7*1010kg*9.8m/s^2* 1/area pressure= you do it from above. Total force= pressure*200*14 ...
Thursday, May 5, 2011 at 6:09pm by bobpursley

science
1. What will happen to the pressure in your tires if the temperature drops 40 degrees over the night? a) Pressure will increase b) Pressure will decrease c) Pressure will not change d) Cannot determine
Friday, February 15, 2008 at 5:56pm by josh

atmospheric pressure
How many moles of gas must be forced into a 3.9 ball to give it a gauge pressure of 9.8 at 25? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5 so that the total pressure in the ball is 24.3 . Express your answer using two ...
Monday, November 19, 2012 at 11:43am by Anonymous

chemistry
in which location, would the boiling piont of water will be highest ? A) new mexico where pressure is 710torr B) new york city where pressure is 760torr C) mount everest where pressure is 244torr D) a pressure cooker where pressure is 760torr
Friday, August 5, 2011 at 7:10am by marjani

Chemistry
Because the total pressure is the sum of the vapor pressure of water + the pressure of the air. Said another way, the water in the bottle exerts a pressure, too, and you want the pressure of the dry gas, not the wet gas.
Wednesday, September 28, 2011 at 1:59pm by DrBob222

Chem
The boiling point is defined as the temperature at which the vapor pressure of the liquid equals the atmospheric pressure. So as the pressure is increased, the vapor pressure must be higher if pressure is higher and how do we get a higher vapor pressure. Lower T or higher T?
Wednesday, February 23, 2011 at 11:02pm by DrBob222

Chemistry
The reaction for my lab is Mg(s)+2HCl(aq)--> MgCl2(aq)+H2(g) I need to find the pressure of the hydrogen gas. Initial Pressure = 0.98692 atm Total Pressure = 1.64816 atm I don't know if I calculated the pressure of hydrogen gas correctly. I used the formula Total Pressure=...
Sunday, July 15, 2012 at 12:07am by Zach

Science
HI there, Water pressure is more than the air pressure that you breathe in. So, if you are stuck in water..the water pressure will make you feel a pressure and force on your ears. So, when you dive deep underwater you will feel immense pressure on your ears because your body ...
Saturday, February 16, 2008 at 11:28pm by easycollegesuccess

Physics
force=pressure*PI*12^2 So the issue not given, is what the pressure inside relative to? Relative pressure? If so, no answers are correct, unless you assume atmospheric pressure outside is 1atm. Now if the absolute pressure inside is 2 atm, and the outside pressure is 1 atm, ...
Monday, October 1, 2012 at 1:49pm by bobpursley

physics
An eardrum can burst when the pressure exceeds one atmosphere and the pressure inside the ear fails to equalize. Determine the depth in seawater when this pressure would be reached. (pressure of ocean = 1.03*10^3 kg/m^3)
Tuesday, February 23, 2010 at 2:34pm by Alex

Chemistry
you need to find the pressure for water vapor for certain temperatures. this is given in a table and have been calculated for you. use the dalton's law of Partial pressure. i.e. the Pressure for the dry gas equals the Total pressure of the system - the pressure of water vapor ...
Saturday, May 11, 2013 at 3:27pm by bonjo

Chemistry
I don't have Table 5.2 but I assume that is vapor pressure of water. Total pressure (752 torr) = Partial pressure H2 + partial pressure of H2O. Look in the table at 16 C and pick up the vapor pressure of water (partial pressure of water), subtract that from 752 to find the ...
Monday, October 18, 2010 at 5:18pm by DrBob222

pressure
is light pressure more easy to localize than deep pressure or is the other way around What do you mean light pressure and deep pressure?
Sunday, January 21, 2007 at 7:38pm by david

engineering
A saturated soil sample under CU test was subjected to a confining pressure of 200 kPa with back pressure (pore pressure) of 50 kPa. What would be the value of pore pressure if the confining pressure was raised to 400 kPa without drainage? If the pore pressure parameter A is 0...
Wednesday, December 4, 2013 at 2:05am by WYNN

heat
if the absolute pressure of a gas is 550.280 kPa, its gage pressure is ? A.101.325kPa b.277.280kPa c.448.955kPa d.651.605kPa Gauge pressure - atmosphericpressure=absolute pressure where atmospheric pressure varies, but standard atmospheric pressure is 101.325kPa NEED ANSWER ...
Friday, July 15, 2005 at 4:50pm by Andre

chemistry
How many moles of gas must be forced into a 3.1L ball to give it a gauge pressure of 9.8psi at 22degrees C? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5psi so that the total pressure in the ball is 24.3psi .
Saturday, April 28, 2012 at 12:57am by Jess

chemistry
How many moles of gas must be forced into a 3.7L ball to give it a gauge pressure of 8.4psi at 23degrees C? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.6psi so that the total pressure in the ball is 23.0psi
Saturday, April 28, 2012 at 11:24am by Jessica12

Chemistry
Dalton's law says pressures are based on mole ratios. 14 total "moles' total pressure= 14/3 * .390= you do it. pressure blue: 6/14 * total pressure pressure orange: 5/14 *(total pressure) and of course, the sum of the three partial pressures should equal total pressure.
Sunday, October 14, 2012 at 9:23pm by bobpursley

biology
hi i have a few questions 1)osmotic pressure Basically, i got that its the pressure opposing osmois. can you explain it to me ? 2)hydroltic pressure Im thinking that its the pressure that builds up due to a higher concentration. Must be like potiential energy.
Thursday, September 17, 2009 at 9:49pm by Jim_R

chemistry
How many moles of gas must be forced into a 3.9 ball to give it a gauge pressure of 9.8 at 25? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5 so that the total pressure in the ball is 24.3 . Express your answer using two ...
Monday, November 19, 2012 at 11:43am by Anonymous

AP Chem
First, get the water vapor pressure at 26C. Subtract that water partial pressure from the pressure in the tube, and you have the pressure of H2, you are given the temp, and the volume. use n=PV/RT to get moles.
Tuesday, November 4, 2008 at 7:44pm by bobpursley

Math
Your calculation is correct; just multiply it out to 0.32m^3. Gauge pressure is pressure in excess of atmospheric pressure. 1 atmosphere is 101.325kPa. So guage pressure is: (550.280-101.325)kPa.
Tuesday, July 5, 2005 at 1:46pm by Graham

Chemistry
A basketball is inflated in a garage at 25 degrees C to a gauge pressure of 8.0 psi. Gauge pressure is the pressure above atmospheric pressure, which is 14.7 psi. The ball is used on the driveway at a temperature of -7 degrees C and feels flat. What is the actual pressure of ...
Thursday, January 4, 2007 at 3:43pm by Cuzzy

Chemistry
A 225 g sample of xenon is placed in a 15.6 L stainless steel vessel at 27.0°C. a. What is the pressure in the vessel? b. If the temperature is raised to 200°C, what is the pressure in the vessel? c. The air pressure outside the vessel is 1.00 atm. If the vessel is opened to ...
Thursday, May 19, 2011 at 12:33am by Shell

Chemistry
Total pressure is 750 mm Hg. Total pressure = pressure H2 + pressure water vapor. Look up the vapor pressure of water at 22 C.
Friday, February 19, 2010 at 12:12am by DrBob222

chem
If the total pressure is 752 mm Hg, that is the pressure of the H2 gas + the pressure of the water. So look up the vapor pressure of water at 25 degrees C (at moderate temperatures I remember that the vapor pressure of water is approximately the samae as the T reading in C---...
Sunday, May 11, 2008 at 8:15pm by DrBob222

chemistry
Look up the vapor pressure of water at 35 degrees celsius (note the correct spelling of celsius) and add it to the pressure of N2 gas. Probably the water pressure will be listed in mm Hg and you must convert either N2 pressure or vapor pressure H2O before adding.
Friday, April 9, 2010 at 7:05pm by DrBob222

Chemistry
How many moles of gas must be forced into a 4.8L tire to give it a gauge pressure of 30.8psi at 30 degrees celsius? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5L so that the total pressure in the tire is 45.3psi. What formula...
Wednesday, February 20, 2013 at 10:49am by Claire

Chemistry
Dalton's Law of partial pressure says that total pressure is the sum of the partial pressure of each gas. Ptotal = Pair + Pethanol. You know total, you know air, calculate pressure ethanol.
Thursday, July 3, 2008 at 3:15am by DrBob222

Chemistry
Subtract the vapor pressure of water from total pressure, that yields the partial pressure of the gas. Now you have temp, partial pressure, use the combined gas law to find the new volume.
Thursday, February 14, 2008 at 12:56am by bobpursley

Chemistry
180/760 gives the DIFFERENCE between the atmospheric pressure and the pressure in the container in mmHg's. The container pressure is higher than the atmospheric pressure so add the difference to the container pressure.
Sunday, October 21, 2007 at 4:58pm by Jrod

Chemistry
A basketball is inflated in a garage at 25 degrees Celsius to a gauge pressure of 8.0 psi. Gauge pressure is the pressure above atmospheric pressure, which is 14.7 psi. The ball is used on the driveway at a temperature of -7 degrees celsius and feels flat. What is the actual ...
Thursday, December 28, 2006 at 3:49pm by Alexandria

Physics
pressure= atm pressure+ pressure pgh pressure due to height= pgh= 1000kg/m3 *9.8m/s* 11000m = 107800kPa 1atm=101.3Kpa so 107800kPa=1064.16 atm total pressure= 1+1064.16atm =1065 atm. =rounding to two sig fig: 1100atm
Thursday, November 12, 2009 at 9:00pm by miha

chemistry
Use PV = nRT to calculate the pressure of Ar in the flask at the beginning. Then total pressure = partial pressure Ar + partial pressure ethane.
Monday, March 1, 2010 at 6:44pm by DrBob222

Chemistry
from the total pressure, I would subtract the water vapor pressure (at 25C) to get the partial pressure of O2. Partial pressure O2 + watervapor =760torr
Friday, April 16, 2010 at 2:14pm by bobpursley

calculus
At a constant temperature, the pressure, P, and volume, V, of a trapped gas have the relationship P equals the quotient of k divided by V , where k is some positive constant. What occurs if the volume is compressed such that V → 0+? The pressure increases without bound. ...
Wednesday, February 5, 2014 at 6:56pm by ashley

chem
the pressure 15 meters under water is 248 kPa what is the pressure in atm what is the pressure in mmHg
Tuesday, November 13, 2012 at 12:05am by christie

physics
By the way, for pressure submerged add the surface pressure to the pressure due to water depth.
Tuesday, July 27, 2010 at 5:39pm by Damon

Thermodynamics or Chemistry - help required
Note: psig means gauge pressure, equal to pressure in excess of atmospheric pressure.
Sunday, March 13, 2011 at 8:35am by MathMate

Chemistry
A 150.0 mL flask contains 740. g of N2 at 0°C. What is the pressure in atm. What is the pressure in torr? What is the pressure in psi?
Wednesday, February 26, 2014 at 3:07pm by Lexus

physics
Sorry, I didn't read properly. The question requested absolute pressure, which includes atmospheric pressure, equal to about 103.59 kPa. Watch out for units when you add hydrostatic pressure in N/m² (=Pa) to atmospheric pressure in kPa.
Tuesday, November 16, 2010 at 9:46pm by MathMate

chemistry
The definition of boiling point is: The temperature at which the vapor pressure of the fluid (in this case water) equals atmospheric pressure. SO, if atmospheric pressure is 244 torr on Mt Everest, the water boils at a lower point than if you are in New Mexico where the ...
Friday, August 5, 2011 at 7:10am by DrBob222

Chem
You don't list a pressure initially; the final pressure will be eight times (8x) the initial pressure.
Monday, January 21, 2013 at 8:23pm by DrBob222

Physics
Gauge pressure is the pressure relative to the ambient atmospheric pressure. A pascal (Pa) is the unit of measurement of pressure equivalent to 1 N (newton) acting on an area of 1 m². To produce a pressure sufficient to suck water to a height of 187 mm, the pressure is ...
Wednesday, November 25, 2009 at 8:10pm by MathMate

Science
Wouldn't that depend on the difference between the outlet pressure and the pressure in line? I have no idea what you mean by "normal pressure".
Friday, February 22, 2008 at 8:47pm by bobpursley

Chemistry
the total pressure in the vessel is 199kPa. How much pressure does nitrogen exert on helium if it had a pressure of 94 kPa?
Tuesday, October 19, 2010 at 7:12pm by Guy

pressure
determinr the liquid andabsolute pressure at a depth of 4min aswimmining poolgiven that the atmospheric pressure is approximately 101 kPa
Friday, March 30, 2012 at 8:39am by Anonymous

chemistry
Partial pressure is divided according to mole ratio. Figure out the moles of each, than add to get total moles. pressuremethane= molesmethane/totalmoles * total pressure pressurethane= moleethane/totalmoles * total pressure and so on. until you get the ones you know. then ...
Wednesday, May 5, 2010 at 5:23am by bobpursley

chemistry
Use PV = nRT and calculate pressure for methane. Convert 8.00 (WHAT) to moles. Do the same for 18.0 WHAT ethane. Then partial pressure CH4 + partial pressure ethane + partial pressure unknown = 3 atm.
Saturday, November 20, 2010 at 7:52pm by DrBob222

Because pressure sensors are found deep in the dermis, they are not able to feel the difference between a little pressure and a lot of pressure. False?
Thursday, November 8, 2012 at 4:41pm by rawr... im a dinosaur.... rawr

Chemistry
Which of the following statements is (are) true? A. The vapor pressure of CO2 is lower than the vapor pressure of water. B. Sea water has a lower vapor pressure than distilled water. C. The vapor pressure of 1 m NaCl is higher than the vapor pressure of 0.5 m KNO3, assuming ...
Monday, August 30, 2010 at 8:07pm by kendra

physics
Tire pressure gauges do not read the absolute pressure, but the absolute pressure is what must be used when applying the ideal gas law. If the gauge says 2.2 atm, the actual absolute pressure is 3.2 atm. The absolute pressure at the higher temperature is then (323/298)*3.2 = 3...
Wednesday, May 26, 2010 at 1:43am by drwls

chemistry
absolutely incorrect. 1. Subtract the water vapor pressure from the observed pressure to get the pressure of the hydrogen gas. 2. figure the moles of that hydrogen at its pressure, temp, and volume. 3. According to the balanced equation, that should also be the same number of ...
Wednesday, June 17, 2009 at 1:46pm by bobpursley

Chemistry...
Total pressure= sum of the partial pressures 762 torr-water vapor pressure=O2 pressure water vapor pressure at 25ºC =23.756 torr But check the reference value.
Wednesday, February 20, 2013 at 7:11pm by Devron

CHEM!
A gas mixture contains 0.60 mol of N2, 0.10 mol of H2, 0.20 mol of CH4. Calculate the pressure of the gas mixture and the partial pressure of each constituent gas if the mixture is in a 6.0 L vessel at 27C. What is the: Total pressure Pressure of H2 Pressure of N2 Pressure of ...
Monday, October 29, 2012 at 3:29pm by David

Chemestry @
a. total pressure = partial pressure water + partial pressure chlorine. b. I don't know what I missed but the problem says you have 27.6 mL I think. In any case, however, you haven't specified the pressure or temperature of if you want the dry gas or wet gas. c. Use PV = nRT. ...
Sunday, October 26, 2008 at 7:30pm by DrBob222

chemistry
Partial pressures are additive. So, total pressure - partial pressure of Hg = partial pressure of nitrogen. Use PV = nRT (using nitrogen's partial pressure) to find volume.
Thursday, March 24, 2011 at 7:36am by Liz

Science
is that "pressure change" or "volume change"? if pressure change, new pressure is one-fifth of the original pressure, or 2/10 = 1/5 if volume change,, at a constant temperature, the new volume becomes five times the original, or 5*5 = 25 cubic inches ..since pressure is ...
Tuesday, October 26, 2010 at 11:00pm by jai

science
If the absolute pressure of gas is 550.280 kPa, it's gage pressure is what? Subtract atmospheric pressure from that to get gage pressure. Atmospheric pressure varies with altitude and weather, but the average atmospheric pressure, at sea level, is 101.325 kPa. 550.280 - 101....
Friday, July 1, 2005 at 3:21pm by Naomi

science
As you airplane taker off from an airstrip on the ground and rises 30,000 feet into the sky what happens to the air pressure on the outside of the airplane ? Answers are Air pressure decreases Air pressure increases Air pressure stays same more information is needed
Tuesday, March 25, 2014 at 9:02pm by snow

PHYSICS!
In scuba diving, a regulator is used so that the pressure of the air the diver breathes is close to that of the ambient water. A reckless swimmer decides to use a hose sticking out of the surface to breathe underwater while diving in a lake. When the air pressure in the lungs ...
Saturday, October 27, 2012 at 7:24pm by Emily

Chemistry
Based on what you told me (I've not performed this experiment), PV = nRT so R = (PV)/nT If you did not correct the pressure you read for the room for the vapor pressure of water (don't you usually subtract the vapor pressure of water to obtain the partial pressure of the dry ...
Thursday, January 21, 2010 at 4:34pm by DrBob222

science
1. What will happen to the pressure in your tires if the temperature drops 40 degrees over the night? a) Pressure will increase b) Pressure will decrease c) Pressure will not change d) Cannot determine 2. Explain, on a molecular level, why this happens. these questions are ...
Friday, February 15, 2008 at 6:24am by josh

Chemistry
I obtained 0.584 atm also. You solved for p and that gives you the partial pressure of H2 and S. To find partial pressure of the H2S, that is 0.121-p. Evaluate that, then add the partial pressure of each gas to find the total pressure in the container. The problem asks total P.
Friday, March 9, 2012 at 9:17pm by DrBob222

chemistry
How would one calculate the equilibrium pressure of Sodium bicarbonate and citric acid in water (think Alka Seltzer), reacting in a closed volume. The pressure builds up to a point, where the reaction slows due to pressure build up. How do I calculate the equilibrium pressure ...
Monday, April 12, 2010 at 2:59pm by Joe

precalculus
The earth's atmospheric pressure, P, in terms of height above sea level is often modeled by an exponential decay function. The pressure at sea level is 1013 millibars and the pressure decreases by 14% for every kilometer above sea level. (a) What is the atmospheric pressure at...
Thursday, March 3, 2011 at 5:41pm by amanda

Physics
A horizontal pipe narrows from a diameter of 10 to 5 cm. For an incompressible fluid flowing from the larger diameter to the smaller: Question 5 options: 1.the velocity and pressure both increase. 2.the velocity increases and the pressure decreases. 3.the velocity decreases ...
Wednesday, August 10, 2011 at 3:28pm by Sonya

pre-calc
Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high blood pressure of 150/...
Sunday, March 7, 2010 at 5:46pm by Phillip

Precalc Repost
Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high blood pressure of 150/...
Sunday, March 7, 2010 at 8:01pm by Phillip

health
What is atmospheric pressure? A. Pressure of the air inside the body B. Pressure of the air outside the body C. Pressure of the air within one’s mouth D. Pressure of the air within one’s lungs i think its D
Monday, February 25, 2013 at 12:28pm by hannah

chemistry
given 2C6H6+15O2->12CO2+6H2O 1. Starting with a confined volume of 4.80L and O2 with a partial pressure of 223.1 torr at 25 degrees C. C6H6 is in excess. The reaction is allowed to proceed to completion. The container is returned to 25C. Both liquid water and benzene are ...
Tuesday, November 13, 2012 at 12:30pm by stacy

chemistry
given 2C6H6+15O2->12CO2+6H2O 1. Starting with a confined volume of 4.80L and O2 with a partial pressure of 223.1 torr at 25 degrees C. C6H6 is in excess. The reaction is allowed to proceed to completion. The container is returned to 25C. Both liquid water and benzene are ...
Tuesday, November 13, 2012 at 12:31pm by stacy

Chemistry
Dalton's Law of Partial Pressure says that the total pressure is the sum of the partial pressure of each gas. Ptotal = PHe + PH2O
Sunday, January 10, 2010 at 6:57pm by DrBob222

physics
The "pressure at the surface of the water", what is above the water? Air at 100kPa? So, is this gauge pressure in relation to ouside the tank, or absolute pressure?
Friday, January 29, 2010 at 2:44pm by bobpursley

PHYSICS
WHEN THE BAROMETRIC PRESSURE IS 14.9LBS\IN AND THE PRESSURE GAGE ON A TIRE READS 34.6LBS\IN WHAT IS THE ABSOLUTE PRESSURE INSIDE THE TIRE
Monday, October 1, 2012 at 2:34pm by PATRICK

chemistry
a. My calculator reads 1.035 atm which I would round to 1.0 to two s.f. b. I thought Dalton's law said that the partial pressure of a gas is the pressure of the gas as if it were the only gas in the container. So why would the answer for b and a not be the same? c. Total ...
Monday, November 1, 2010 at 8:42pm by DrBob222

Physics - Tire Pressure
I made an error - Why is the atmospheric pressure of 14.7 lb/in2)not added to the pressure of the tire gauge when computing the weight of the vehicle?
Monday, October 5, 2009 at 12:36am by Mary

chemistry
Suppose two gases in a container have a total pressure of 1.20atm what is the pressure of gas B if the partial pressure of gas A is 0.75atm? Read more:
Wednesday, February 2, 2011 at 11:12pm by L0ls

Physics - Tire Pressure
Why is the air (atmospheric) pressure of 14.7 lbs/in2 not included in the pressure gauge reading for a tire?
Monday, October 5, 2009 at 12:36am by Mary

chem
A gas has pressure of 4.62 atm when its volume is 2.33 L if the temperature remains constant, what will the pressure be when the volume is changed to 1.03 L? express the final pressure in torrs
Monday, April 28, 2008 at 7:29pm by jerson

chemistry
A car tyre pump in the morning at 10degree celcius to a pressure of 0.20NM/S increases in pressure at it's temperature rises.if the temp. reachs 18degree celcius,what is the pressure
Wednesday, March 16, 2011 at 5:20am by pete onoriode

chemistry
Use PV = nRT and calculate pressure He. Repeat to calculate pressure N2. Add the two for the total pressure. Find n by n = grams/molar mass
Sunday, November 20, 2011 at 10:44am by DrBob222

CHM 1010
Under pressure of 862kPa, a gas has a volume of 752ml. The pressure is increased, without changing the temperature, until the volume is 624ml. What is the new pressure
Monday, April 1, 2013 at 4:42pm by Jocelyn

science
Helium has the lowest boiling point of the elements. The slightest change in temp can cause it to vaporize and expand. To prevent pressure explosions, a line from the tank has a "burst disk" in case a of sudden pressure increse. then the diaphragm would rupture and release the...
Sunday, January 2, 2011 at 11:29am by anonymous

Physics
No.NO. When one measures tire pressure, you measurt gage pressure (realtirepressure-atmosphericpressure) So for the real tire pressure, add 14.7psi P1=44.7PSI P2=? then subtract 14.7 psi to get P2 gauge pressure. Finally, Temperatures must be in Kelvins, not C
Thursday, November 19, 2009 at 5:06pm by bobpursley

chemistry
I assume you are using PV = nRT so rearrange that to V = nRT/PV. Now the pressure that goes in is room pressure - water pressure at that T. So how will the calculation of V be changed if you don't subtract th4 water pressure. Hint: you will be substituting a larger number for ...
Wednesday, January 19, 2011 at 9:50pm by DrBob222

Physics
2. On the inside of an airplane the air pressure is about 85% of the atmospheric pressure at sea-level while outside, when it is cruising, the pressure is about 25% of the sealevel atmospheric pressure. If a window is 0.46 m in diameter, what is the net outward force on the ...
Friday, February 11, 2011 at 12:59am by Newton

Physics
Mercury has a density of 13600 kg/m3. At what depth in millimetres is the pressure in mercury equal to that of standard atmospheric pressure? (take std pressure= 101 Pa)
Wednesday, February 15, 2012 at 6:21am by Kaiz

Physics
Mercury has a density of 13600 kg/m3. At what depth in millimetres is the pressure in mercury equal to that of standard atmospheric pressure? (take std pressure= 101 Pa)
Wednesday, February 15, 2012 at 6:50am by Kaiz

Chem
The total pressure in a vessel containing hydrogen collected over water at 25.0°C was 0.8 atm. The vapor pressure of water at that temperature is 23.8. what was he pressure of the oxygen in torr?
Friday, February 22, 2013 at 11:37pm by Lupe

Chemistry
A gas has a pressure of 4.62 atm when its volume is 2.33 L. If the temperature remains constant, what will the pressure be when the volume is changed to 1.03 L? Express the final pressure in mm Hg.
Monday, April 7, 2014 at 6:31pm by Suzanne

chemistry
Shown below is a rough sketch of the unary phase diagram (pressure vs. temperature) for carbon dioxide (CO2), dry ice. Note the diagram is not drawn to scale and contains breaks in the axes to signify this. Using the diagram, answer the following questions: (a) Give the ...
Friday, January 11, 2013 at 5:39am by Dylanprof

science
Helium has the lowest boiling point of the elements. The slightest change in temp can cause it to vaporize and expand. To prevent pressure explosions, a line from the tank has a "burst disk" in case a of sudden pressure increse. then the diaphragm would rupture and release the...
Sunday, January 2, 2011 at 8:00am by anonymous

Chemistry
In an experiment, 238 mL of 0.45 molar hydrochloric acid completely reacts with excess iron to produce hydrogen gas and iron (III) chloride. What volume will the hydrogen gas occupy if it is collected over water at 35 degrees Celsius and 735 torr? The vapor pressure of water ...
Wednesday, January 19, 2011 at 10:33pm by Tichele

Ap Physics (Fluids and Pressure_
a) gauge pressure = (water density, kg/m^3)x(depth, meters)x(acceleration of gravity, m/s^2) The answer will be in Pascals b) add atmospheric pressure to the gauge pressure
Thursday, November 12, 2009 at 6:25am by drwls

chemistry
The hydrogen gas collected also contains some water vapor. The pressure of this mixture of gases equals the room pressure. find the partial pressure of H2 gas.
Tuesday, February 12, 2013 at 6:40pm by Anonymous

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