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April 20, 2014

Search: air pressure

Number of results: 18,405

CHEM LAB!!! Must finish!!!
I hate to see anyone fail, I'll give you what little information that I can. I thought it was common knowledge that water boils at 100 degrees C (212 degrees F) at sea level. Water boils at higher temperatures at higher elevations. This site may also help you. http://www....
Friday, May 30, 2008 at 10:25pm by Ms. Sue

physics
A scuba diver searches for treasure at a depth of 20.0m below the surface of the sea. at what pressure must the scuba device deliver air to the diver? (density of sea water= 1030kg/m^3;atmospheric pressure= 1.013x10^5 pa)
Sunday, May 6, 2012 at 10:06pm by Sarah

chemistry
The air within a piston equipped with a cylinder absorbs 570J of heat and expands from an initial volume of 0.12L to a final volume of 0.88L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston?
Wednesday, December 19, 2012 at 6:47pm by savannah

chemistry
The air within a piston equipped with a cylinder absorbs 570J of heat and expands from an initial volume of 0.12L to a final volume of 0.88L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston?
Wednesday, December 19, 2012 at 8:20pm by savannah

chemistry
It decreases? If the air pressure increased, wouldn't that make the diver go down? What happens when you press on the pressure cap? Oh, yeah. So, at night the atmospheric pressure increases and therefore the diver sinks? Can someone help me with this question about a Cartesian...
Thursday, May 24, 2007 at 7:22pm by Lillian

physics
A closed auditorium of volume 27100 m^3 is filled with 2210 people at the beginning of a show, and the air in the space is at a temperature of 292 K and a pressure of 1.013·10^5 Pa. If there were no ventilation, by how much would the temperature (in K) of the air rise during ...
Sunday, January 1, 2012 at 12:27pm by maria

physics
A closed auditorium of volume 27100 m^3 is filled with 2210 people at the beginning of a show, and the air in the space is at a temperature of 292 K and a pressure of 1.013·105 Pa. If there were no ventilation, by how much would the temperature (in K) of the air rise during ...
Tuesday, January 3, 2012 at 12:49pm by maria

physics
A closed auditorium of volume 27100 m^3 is filled with 2210 people at the beginning of a show, and the air in the space is at a temperature of 292 K and a pressure of 1.013·105 Pa. If there were no ventilation, by how much would the temperature (in K) of the air rise during ...
Wednesday, January 4, 2012 at 7:52am by maria

physics
A closed auditorium of volume 27100 m^3 is filled with 2210 people at the beginning of a show, and the air in the space is at a temperature of 292 K and a pressure of 1.013·10^5 Pa. If there were no ventilation, by how much would the temperature (in K) of the air rise during ...
Saturday, January 7, 2012 at 3:24pm by linda

Physical Chemistry
What is the mass of air in a 250-mL Erlenmeyer flask (actual volume is 267 mL) at a typical laboratory pressure of 715 torr and a temperature of 21˚C? Assume air to be an ideal gas having an average molar mass of 29.0 g/mol.
Wednesday, September 12, 2012 at 2:48pm by Dia B

Chemistry II
1. Under water where the temperature is 17oC and the pressure is 394 kPa, a diver inhales 2.1 L of air from his SCUBA tank. a) How many moles of gas are in his lungs? b) If the diver swims to the surface without exhaling where the temperature is 32oC and the pressure changes ...
Monday, September 14, 2009 at 11:34pm by pasely

Physics
Praire dogs live in underground burrows with at least two entrances. They ventilate their burrows by building a mound around one entrance, which is open to a stream of air. A second entrance at ground level is open to almost stagnant air. Use Bernoulli's principle to explain ...
Friday, May 11, 2007 at 1:35am by Anonymous

physics
(a)If the wind blows at 30m/s over the roof of your house, what is the pressure difference at the roof between the inside and outside air (b) What net force does this pressure difference produce on a roof having an area of 175m^2? I have no clue how to start. I need help with ...
Sunday, December 16, 2007 at 8:05pm by Anonymous

CHEMISTRY........
i TRIED TO DO IT, BUT MY ANSWERES ARE WRONG. Please show work and explain. 1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by ...
Thursday, October 10, 2013 at 1:03am by Anonymous

physics problem
The bulk modulus K used here is the so-called adiabatic bulk modulus and this is related to the pressure P according to: K = gamma P where gamma = cp/cv = approximately 1.4 for air. So, you know the pressure and the density and then you can find the temperature via the ideal ...
Saturday, April 19, 2014 at 9:04am by Count Iblis

Chemistry,
I reall need help, i know what formulas to use i just dont know how to do it. Can some one please work with me to get to the correct answer? 1.The air in a dry, sealed 2L soda bottle has a pressure of 0.998 atm at sea level at a temperature of 34C. what will be it's pressure, ...
Tuesday, April 6, 2010 at 8:25pm by Courtney

Physics
Assume: P0-pressure at 4500m above sea level. P1-pressure at sea-level P2- pressure at depth of 20.6m P2=P1+dgh = P1 + 1024*9.8*20.6 = P1+2.06x10^5 Pa .......(1) P0=P1-dgh =P1 - 1.3*9.8*4500 =P1 - 0.57x10^5 Pa .......(2) [It is assumed density of air near earth's surface is 1....
Monday, July 2, 2012 at 10:50pm by ajayb

chem
A 31.2 cm3 bubble of air at 1.4 atm pressure is subjected to a new pressure of 3.9 atm. What will be the new volume (cm3)? Assume constant temperature. THe answer I got was 11.2 cm3 is this correct
Saturday, October 16, 2010 at 4:15pm by amber

physics
Your town is installing a fountain in the main square. If the water is to rise 20 m above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? Assume atmospheric pressure equal to 100,000 Pa.
Sunday, October 13, 2013 at 10:03pm by Em

Thermodynamics
For the average atomic mass of air, use 70 percent N2, and 30 percentO2. .7*28*+.3*32= it is about 29amu. So you can calculate the mass of one liter, given pressure and temperature. Now, if you add 25ppm of carbon tet, you have to convert that to amu. 25*molmassCCl4=....amu ...
Sunday, September 16, 2007 at 1:08pm by bobpursley

Physics
The collisions of the stone with air molecules tend to slow the stone down slightly. A frictional force called drag is exerted upon the stone. It is of two types: (1) pressure drag (higher pressure in front that behind) and (2) boundary layer friction along the sides.
Wednesday, March 23, 2011 at 1:27am by drwls

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
At the surface of a freshwater lake the air pressure is 1.0 atm. At what depth under water in the lake is the water pressure 3.8 atm?
Tuesday, April 20, 2010 at 4:27pm by Max

chemistry
A 45.3 cm3 bubble of air at 1 atm pressure is subjected to a new pressure of 4.7 atm. What will be the new volume (cm3)?
Monday, October 17, 2011 at 12:18am by james

Chemistry 20
a balloon can hold 800ml of air before breaking. A balloon at 4 deg C contain 750ml of air is brought into a house at 25 deg C. Assuming a constant pressure inside and outside the ballon, will the balloon break? What formula would be used here?
Saturday, June 18, 2011 at 2:42pm by Cheryl

science
thanks ms sue air pressure it was
Thursday, August 26, 2010 at 11:53am by shorty

science
Air pressure is temperature, Jennifer
Tuesday, October 30, 2012 at 8:24pm by Anonymous

science
Air pressure is temperature, Jennifer
Tuesday, October 30, 2012 at 8:24pm by Anonymous

Gen Chem 2
The air within a piston equipped with a cylinder absorbs 555 J of heat and expands from an initial volume of 0.12 L to a final volume of 0.87 L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston in Joules?
Wednesday, March 5, 2008 at 8:16pm by Jessica

Physics
Hot air balloons float in the air because of the difference in density between cold and hot air. In this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. To do this, use the following variables and make these ...
Wednesday, July 13, 2011 at 7:08pm by Jenny

science
Here in some of the following links you will find information: http://search.yahoo.com/search?fr=mcafee&p=how+does+the+body+keep+from+being+crushed+by+air+pressure%3F Sra
Tuesday, May 3, 2011 at 9:40pm by SraJMcGin

physics
Winds in a certain city can attain sustained speeds of 45 m/s when the jet stream descends during spring. Approximately what force does a roof with an area of 200 m^2 experience due to the Bernoulli effect, assuming air flow is completely laminar? Density of air is 1.14 kg/m^3...
Tuesday, November 9, 2010 at 6:04pm by Anonymous

thermodynamics
A scuba tank contains 1.5 kg. of air. The air in the tank is initially at 15 degree celcius. The tank is left near an engine exhaust line, and the tank's pressure doubles. Determine the final temperature, change of internal energy, change of enthalpy, and heat.
Tuesday, November 29, 2011 at 6:07pm by hermie

physics
Many of you may have noticed the phenomenon that basketballs get flat if the weather is cold. If a basketball was inflated to a gauge pressure of 60,000 Pa when the temperature outside was 20∘C, what is the gauge pressure inside the basketball in Pa when the temperature ...
Monday, May 27, 2013 at 9:05am by stranger

chemistry
A 1.00-L sample of dry air at 25 °C contains 0.0319 mol N2, 0.00856 mol O2, ... The main components of dry air, by volume, are N2, 78.08%; O2, 20.95%; Ar, ... by volume, of the following main gaseous components: N2, 74.1%; O2, ... What is the partial pressure of each gas in ...
Tuesday, April 19, 2011 at 2:19pm by Kate

Chemistry
1. If 22.5 L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at constant temperature. What is the new volume? 2. A gas with a volume of 4.0L at a pressure of 205kPa is allowed to expand to a volume of 12.0L. What is the pressure in the container if the temperature remains...
Wednesday, January 15, 2014 at 3:55am by Ashley Kate

engineering
using air pressure, a ball of 0.5kg is forced to move through the tube lying in the horizontal plane and having the shape of a logarithmic spiral. If the tangential force exerted on the ball due to the air is 6N, determine the rate of increase in the ball's speed at the ...
Saturday, November 15, 2008 at 1:02pm by sarah

chem help
a scuba diver breathing normal air descends 100m of depth, where the total pressure is 11 atm. What is the partial pressure of oxygen that the diver experiences at this depth? Can someone help out on this question? Make a ratio: 11atm/1atm= P/partial pressureO2 at surface ...
Monday, March 19, 2007 at 6:26pm by david

Science
1> What 2 types of electromagnetic energy have wavelengths of 0.76 cm? 2> What is the pressure at a depth of 3000 km inside the Earth? 3> How many inches of mercury are equivalent to 974.5 millibars of air pressure? 4> Jupiter's period of revolution is how many ...
Sunday, September 14, 2008 at 7:15pm by Lisa

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

Physics
Your town is installing a fountain in the main square. If the water is to rise 14 m (45.9 feet) above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? Assume atmospheric pressure equal to 100,000 Pa.
Monday, April 29, 2013 at 7:35pm by Jay

physics
Your town is installing a fountain in the main square. If the water is to rise 16 m (52.5 feet) above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? Assume atmospheric pressure equal to 100,000 Pa.
Thursday, April 10, 2014 at 12:53pm by Shanna

physics
Your town is installing a fountain in the main square. If the water is to rise 26 m (85.3 feet) above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? Assume atmospheric pressure equal to 100,000 Pa.
Wednesday, April 16, 2014 at 9:10am by hai

Chemistry
Typically, when a person coughs, he or she first inhales about 2.50 L of air at 1.00atm and 25 degreesC. The epiglottis and the vocal cords then shut, trapping the air in the lungs, where it is warmed to 37 degrees C and compressed to a volume of about 1.70L by the action of ...
Sunday, October 10, 2010 at 9:31pm by Ellen

Physics
An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air? Ideal gas formula is pv=...
Sunday, April 20, 2008 at 11:28am by Johnson

science
On which? The air pressure on all three are the same.
Tuesday, September 30, 2008 at 6:13pm by bobpursley

physics
Hint: What do you think is the pressure of the air in the tank?
Wednesday, November 19, 2008 at 9:38am by Count Iblis

science
Why does air flow from high to low pressure?
Monday, January 19, 2009 at 7:43pm by Gina

science
air pressure changes whats the effect of that
Monday, January 25, 2010 at 9:27pm by jason

science
how does air pressure affects the outer space
Saturday, March 6, 2010 at 10:33pm by Pamela

science
The pressure created by the weight of air is greatest_______.
Wednesday, August 25, 2010 at 3:01pm by sean

integrated science
explain pressure relations for air
Wednesday, June 8, 2011 at 8:16pm by brit

chemistry
a balloon has a volume of 456 mL at a pressure of 1.0 atm. it is taken under water in a submarine to depth. where the air pressure in the submarine is 3.3 atm. what is the volume of the balloon? assume constant temperature?
Wednesday, May 15, 2013 at 2:05pm by john

Chemistry
As a hot air balloon rises to increasingly higher altitudes describe what happens to the volume of the balloon if at constant pressure? If pressure is constant, and temperature decreases.. PV=nrT Volume is directly proportional to temperature..
Thursday, January 11, 2007 at 7:36pm by Lisa

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

physics
At 66.8% humidity on a 15C day, the air partial pressure is 66.8% of 1.69 kPa, or 1.13 kPa. That is 94.9% of the saturation pressure at 10 C. Therefore the relative humidity becomes 94.9% when the temperature drops to 10C
Friday, March 26, 2010 at 11:21pm by drwls

Physics
A man of mass 70 kg is in free fall in the air. He reaches a terminal speed of about v_term = 54 m/s. (Note that v_term >> v_crit and we are in the pressure dominated regime where F_fric is directly propotional to v^2 ; we have g = 9.8 m/s ) What is the force (in N) due ...
Wednesday, October 16, 2013 at 7:56pm by saru

physics
It is approximately (1/2)*(air density)*V^2*(roof area), but depends upon what the pressure inside the house is, and that depends upon which windows or doors are open. Air density is about 1.2 kg/m^3. I get about 209,000N or 46,000 lb.
Sunday, November 15, 2009 at 8:06pm by drwls

chemistry
A 0.75 L bottle is cleaned, dried, and closed in a room where the air is 24°C and 35% relative humidity (that is, the water vapor in the air is 0.35 of the equilibrium vapor pressure at 24°C). The bottle is brought outside and stored at 0.0°C. (See Table 5.2)
Friday, January 28, 2011 at 9:34pm by Anonymous

Physics/chemistry
Hot air ballons rise because of the lower density of the gas inside, compared to outside, the balloon. The fact that the air is hot is what reduces the density, but cold helium or hydrogen would work even better. The balloon is pushed upward by the greater outside pressure on ...
Saturday, February 16, 2008 at 4:23pm by drwls

8th grade
how to make a double line graph to show air/water temperatures.mon.air-92 water-68tues.air-94 water-69 wed.air-88 water=70,thurs. air=85 water=72 and friday air=96,water=72
Wednesday, June 9, 2010 at 4:23pm by will

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

Physical science
Is it possible that heat increases the air pressure?
Wednesday, February 27, 2008 at 9:24pm by Ms. Sue

science
please help how dows the movement of air molecules cause pressure?
Tuesday, October 21, 2008 at 9:48pm by Susan

science
how do you keep your body from being crushed by air pressure?
Tuesday, January 6, 2009 at 5:03pm by kayla

science
How does your body keep from being crushed from air pressure?
Tuesday, May 3, 2011 at 9:40pm by Alyssa

science
What altitude would you be at if the air pressure is 0.05 kpa.
Tuesday, January 7, 2014 at 12:25pm by Wendi

science
The water exerts a force up on your hand equal to the weight of water displaced. Therefore an equal and opposite force is down on the scale. Ultimately that force comes from your arm pushing the finger down into the water. In the air there will be no effect because you are not...
Thursday, February 13, 2014 at 10:37am by Damon

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
You didn't fill in P1 or P2. I gave you P at 65.0 C = 760 torr. You have let 65 (338K) = T1 so P1 = 760. Solve for P2. Remember in this type problem that the vapor pressure of ANYTHING at it's boiling point is the pressure of the atmosphere. So if the pressure on Monday is 700...
Monday, January 17, 2011 at 2:50pm by DrBob222

Physics. Need urgent help.
A scuba diver searches for treasure at a depth of 20.0m below the surface of the sea. at what pressure must the scuba device deliver air to the diver? (density of sea water= 1030kg/m^3;atmospheric pressure= 1.013x10^5 pa) another one A king's crown is said to be solid gold but...
Sunday, May 6, 2012 at 11:05pm by Dan

Chemistry 105
I don't know how advanced the class is but the simple way is to use PV = nRT. However, the air will collect moisture as it is bubbled through water so the pressure you use is not 729 torr (don't forget it must be changed to atmospheres) but 729 torr - vapor pressure H2O at 25 ...
Sunday, October 23, 2011 at 5:35pm by DrBob222

Physics Urgent please help
A man of mass 70 kg is in free fall in the air. He reaches a terminal speed of about v_term = 54 m/s. (Note that v_term >> v_crit and we are in the pressure dominated regime where F_fric is directly propotional to v^2 ; we have g = 9.8 m/s ) What is the force (in N) due ...
Thursday, October 17, 2013 at 2:49pm by saru

science HELP
Since this is not my area of expertise, I searched Google under the key words "air pressure affect cloud formation" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=air+pressure+affect+cloud+formation&ie=UTF-8&oe=UTF-8 In the future, you can ...
Friday, November 1, 2013 at 8:26pm by PsyDAG

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

physic
A bit longer than it takes an object to fall 236 m, straight down. That would be sqrt(2H/g) = 4.9 seconds. An exact solution would be rather complicated. A pressure wave will go through the snow and an air pressure wave will eventually form in front of the advancing front. ...
Wednesday, December 14, 2011 at 8:30pm by drwls

Physics
A bubble of air, 0.010 m^3 in volume, is formed at the bottom of a lake which is 30.0 m deep and where the temperature is 8.0 C. The bubble rises to the surface, where the water temperature is 26 C and where the pressure is atmospheric pressure. What is the volume of the ...
Tuesday, December 11, 2012 at 7:18pm by Anonymous

algebra 1
this promblem will prepare you for the real world connection. the air around u puts pressure on ur body equal 14.7 pounds per square inch (psi). when you are underwater, the water exerts additional pressure on ur body. for each foot u r below the surface of the water, the ...
Thursday, August 26, 2010 at 10:03pm by alanaR.

Chemistry
A sample of air was compressed to a volume of 18.0 L. The temperature was 290.0 K, and the pressure was 6.80 atm. How many moles of gas were in the sample? If the sample had been collected from air at P = 2.0 atm., what was the original volume of the gas (in liters)? How do I ...
Wednesday, October 31, 2012 at 9:23pm by Kellina

Physics
Seawater has a density of about 1024 kg/m^3. In fresh water, the water line on a certain rectangular raft (8.8cm thick) moves 3.2 cm when a load of cargo is placed on it. How much will the same load of cargo move the water line in seawater? What is the pressure in fresh water ...
Thursday, December 5, 2013 at 7:57pm by Shelby

chemistry
A bag of potato chips contains 585 mL of air at 25°C and a pressure of 765 mm Hg. Assuming the bag does not break, what will be its volume at the top of a mountain where the pressure is 448 mm Hg and the temperature is 6.0°C? I set it up like p1v1/t1= p2v2/t2 and got 940ml but...
Thursday, February 10, 2011 at 4:53pm by sam

chemistry
Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.8 of water upon warming from 25degree C to 50degree C . Assume that the water is initially saturated with nitrogen and oxygen gas at 25degree C...
Sunday, January 24, 2010 at 11:05pm by bf

chemestry
what does air pressure do to the freezing, melting ad boiling point
Thursday, September 17, 2009 at 7:20pm by Chad

science
if you observe that the air pressure is decreasing, what type of weather will it bring?
Wednesday, April 6, 2011 at 7:54pm by jordonna

chemistry
Before a trip from New York to Boston, the pressure in an automobile tire is 2.5 atm at 272 K. At the end of the trip, the pressure gauge reads 1.94 atm. What is the new Celsius temperature of the air inside the tire? (Assume tires with constant volume.) Answer in units of ...
Thursday, March 8, 2012 at 8:56pm by please help

Physics
The process of inhalation in the lung may be modelled (very simplistically) by the pV diagram shown below , in which the pressure drops sharply in the lungs at constant volume, followed by expansion at constant pressure, and then finished by the pressure returning to ...
Tuesday, March 19, 2013 at 8:49am by Sarah

Physics
The process of inhalation in the lung may be modelled (very simplistically) by the pV diagram shown below , in which the pressure drops sharply in the lungs at constant volume, followed by expansion at constant pressure, and then finished by the pressure returning to ...
Tuesday, March 19, 2013 at 8:50am by Sarah

Chemistry
The adult blue whale has a lung capacity of 5.0*10^3L. Calculate the mass of air (assume an average molar mass 28.98 g/mol ) contained in an adult blue whale’s lungs at 0.3 degrees Celcius and 1.10 atm., assuming the air behaves ideally. Calculate the number of molecules in a ...
Tuesday, December 6, 2011 at 1:44pm by Steffani

Applied Chemistry pls help!
from wikipedia: The density of water also causes problems that increase dramatically with depth. The atmospheric pressure at the surface is 14.7 pounds per square inch or around 100 kPa. A comparable water pressure occurs at a depth of only 10 m (33 ft) (9.8 m (32 ft) for sea ...
Friday, April 6, 2012 at 3:15am by Steve

chem
Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.2L of water upon warming from 25C to 50C . Assume that the water is initially saturated with nitrogen and oxygen gas at 25C and a total ...
Monday, January 25, 2010 at 10:33pm by rc

physics
a) (density)*g*(elevation change) = 1.00*10^3 kg/m^3*9.8 m/s^2*1532 m = 15.0*10^6 Pascals That is about 150 atmospheres. b) Velocity = (Volume flow rate)/Area c) Add (1/2)*(density)*V^2 dynamic pressure to the answer in (a) The density here is the density of water . Air has a ...
Wednesday, December 29, 2010 at 3:18pm by drwls

vaporization lab
A graduated cylinder containing some air is immersed in water. The height between the the water surface and the top of the water inside the graduated cylinder is 106mm. Calculate the correction that must be added to the barometric pressure to find the total pressure of the ...
Sunday, November 28, 2010 at 9:16pm by mmeas

physics air bags
There is information in this which is at best misleading, and at worse wrong. " and hence..." is just wrong (or misleading) The air bag value is in deflation time, not inflation time. If a body presses against the inflated bag, it deflates slowly, lowering the force, and ...
Thursday, October 15, 2009 at 3:21am by bobpursley

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

physics
What is the wind speed in m/s required to keep a great white shark suspended in midair during a summer day on the California beach? Details and assumptions Model the shark as a horizontal cylinder 6 m long and 1 m in diameter. The air is at a pressure of 1 atm and a ...
Tuesday, July 23, 2013 at 12:14pm by nathaniel

physics
What is the wind speed in m/s required to keep a great white shark suspended in midair during a summer day on the California beach? Details and assumptions Model the shark as a horizontal cylinder 6 m long and 1 m in diameter. The air is at a pressure of 1 atm and a ...
Wednesday, July 24, 2013 at 9:27am by andy

Chemestry
There isn't anything wrong with Sara's answers but they don't answer the question. The reason it takes longer to cook food in the mountains as that the air pressure is less the higher we go. The boiling point of water is the temperature at which the vapor pressure of the water...
Thursday, September 17, 2009 at 5:35pm by DrBob222

Chemistry-gases
I would calculate mols HNO3 produced by 532 g NO2 and substitute into PV = nRT and solve for L HNO3 at the temperature and pressure. Then ppm = L HNO3/1,000,000 L air at 20C. 0.08E-6 = LHNO3 produced/x Solve for x = L air Check my thinking.
Thursday, March 1, 2012 at 7:26pm by DrBob222

Math
The air pressure in a tire is 150.000 kPa. The internal surface area of the tire is 1150.000 cm^2. Determine the total force applied by the air to the tire. (Round to 3 decimal places) Answer = kN 150.000 kPa x 1000 = 150000 Nm 1150.000 cm / 100 cm = 11.5 m Force = Pressure x ...
Thursday, December 26, 2013 at 4:08pm by Danny

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