Monday
April 21, 2014

Search: Calculate the pressure exerted by 0.4961 mol of N2 in a 10.290-L container at 25.0°C. (See the table given below.)

Number of results: 32,582

chemistry
The temperature of an ideal gas in a 5.00 L container originally at 1.01 bar pressure and 25 °C is lowered to 220 K. Calculate the new pressure of the gas.
Sunday, April 28, 2013 at 8:48pm by Kat

Chemistry
A sample of gaseous PCl5 was introduced into an evacuated flask so that the pressure of pure PCl5 would be 0.54 atm at 425 K. However, PCl5 decomposes to gaseous PCl3 and Cl2, and the actual pressure in the flask was found to be 0.85 atm. Calculate Kp for the decomposition ...
Wednesday, February 13, 2013 at 7:09pm by Margaret

physics
A child sitting 1.50m from the center of a merry-go-around moves with a speed of 1.10m/s . Part a) Calculate the centripetal acceleration of the child. Part b) Calculate the net horizontal force exerted on the child ( = 20.5 ).
Tuesday, May 8, 2012 at 9:33pm by kle

chemistry
I didn't find 10 g H2O; something more like 23 or so. Post your work and someone will find the error. I'm sure you determined the limiting reagent. For part 2, using the limiting reagent and the moles of each material formed, use PV = nRT to calculate partial pressure. For the...
Saturday, November 20, 2010 at 1:34pm by DrBob222

Chemistry
mols Ar = 1.25/39.95 = 0.0313 Use PV = nRT to calculate pressure Ar. Remember that the partial pressure of a gas doesn't depend upon what other gas is present. In effect, we ignore the ethane vapor although the partial pressure of the ethane COULD be calculated, also.
Tuesday, October 5, 2010 at 8:30pm by DrBob222

Thermodynamics
Heyy, Okay so I have a question that I'm trying to figure out how to do and I'm really lost, I was hoping somebody might be able to give me a hand. Thanks in advance. The question in general is, I know that the vapour pressure of CCl4 is 98mmHg at 25 degrees C. This also means...
Sunday, September 16, 2007 at 1:08pm by Tracy

Science
What is the pressure at the bottom of a tube of mercury that is 0.2 m deep? An elephant with a mass of 1000 kg stands on a circus platform that weighs 50 kg. The area of the bottom of the platform is 1.25 m². How much pressure is exerted on the floor beneath the platform? Two ...
Thursday, September 15, 2011 at 2:28pm by Erica

Physics
How much pressure is exerted by a 5000 pound moving vehicle vehicle (hehicle is 6' x 12')?
Saturday, November 6, 2010 at 3:21pm by Barry

chem
at 40 degree C , the vapour pressure of water is 55.3 mm of hg. calculate the vapour pressure at same temp. of 10%aques solution of urea??
Tuesday, June 7, 2011 at 6:28am by niki

science
Calculate the partial pressure of oxygen gas a diver breathes with a heliox mixture containing 2% oxygen at a depth of 100 metres where the total pressure is 100kPa
Tuesday, January 29, 2013 at 5:55am by dennis

Chemistry
What pressure, in atmospheres, is exerted by 0.120 mol of steam (water vapor) at its boiling point of 100.degrees C if the volume is contained in a 2.00-L teakettle?
Sunday, April 3, 2011 at 8:42pm by SusieQ

biology
My teacher said hyrostatic pressure is when a pressure is exerted on a membrane due to an increase in volume. This cause water to move from a low con to a high con and for osmotic he said the opposite. Its the force that cause water to move into a cell. Its due to a high ...
Thursday, September 17, 2009 at 9:49pm by Jim_R

Chemistry
The solubility of NH3 in H2O is 518 g/L at a partial pressure of 760.0 torr. a. Calculate the value of the Henry's Law constant for NH3 b. Calculate the solubility of NH3 in H2O at a partial pressure of 225.0 torr.
Tuesday, December 6, 2011 at 3:24pm by JD

CHEM
Note the correc spelling of celsius. Use PV = nRT to calculate n for N2. Use PV = nRT, substituting 7.5 atm for pressure to calculate n for total number of molecules. Delta n will be the number of Ne moles that must be added and convert moles Ne to grams. You may want to check...
Saturday, November 20, 2010 at 12:48pm by DrBob222

chemistry
the vapor pressure of water at 45.0 °c is 71.93 mmhg. Calculate the vapor pressure of a solution of 1.50 m Al(NO3)3 at this temperature (assume 100% dissociation)
Tuesday, July 16, 2013 at 10:51am by michael

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 help!
A sample of gas at a temperature of 37.0°C has a pressure of 725 torr and occupies a volume of 3.44 L. a. Use Boyle’s law to calculate the new pressure if the temperature is held constant and the volume is increased to 6.54 L. torr b. Use Gay-Lussac’s law to calculate the new ...
Wednesday, February 26, 2014 at 6:46pm by Chelsey

chem-Bob
What pressure (atm) is exerted by a column of ethanol 65.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant. mass*gis the weight of the column density*h*area*g= weight density*h*g= pressure Thanks for your help Bob. The answer i got is...
Sunday, October 17, 2010 at 10:14pm by chris

Chemistry
Read the problem. "Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kPa;" So the pressure 10.2m below is 100 + whatever it is at the surface (which is 101 kPa...
Sunday, March 2, 2014 at 6:10pm by DrBob222

Chemistry
We don't have table 5.2. Water at 20C has a vapor pressure of 17.4 mm Hg. R.H. = vapor pressure/17.4 so you can use that to calculate pressure and use PV = nRT to determine the moles H2O. I assume table 5.2 will give you the vapor pressure of water at 0C. Use that pressure and...
Wednesday, January 26, 2011 at 11:16pm by DrBob222

CHEMISTRY- vapour pressure
Since the solution is 17.6% in bromobenene, that means 17.6 g/100 g soln OR 17.6 g bromobenzene in a solution made up of 17.6 g bromogenzene and (100-17.6 = 82.4 g chlorobenzene). Determine moles bromo and moles chloro. Calculate mole fraction bromo and chloro. Then vapor ...
Saturday, October 9, 2010 at 7:38am by DrBob222

chemistry
what pressure (in atm) is exerted by a column of mercury 1.4O high? The density of mercury is 13.5951 g/cm3.
Friday, June 18, 2010 at 1:42pm by Alex

chemistry
what pressure (in atm) is exerted by a column of mercury 1.4O WHAT high? The density of mercury is 13.5951 g/cm3.
Friday, June 18, 2010 at 1:42pm by DrBob222

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
A sample of carbon monoxide gas whose mass is 6.37 g is heated from 25 oC to 192 oC at a constant pressure of 4.12 bar. Calculate q (in J) for this process. I got an answer of ~1110J Calculate w (in J) for this process. I am unsure how to calculate work considering there is no...
Tuesday, January 24, 2012 at 11:35am by David

Chemistry.
To calculate the air pressure, the volume occupied by the air is assumed constant. Why is this assumption incorrect? Explain how the vapor pressure calculated and the resulting Clausius-Clapeyron plot are affected?
Tuesday, October 16, 2012 at 12:03am by Shardae.

Chemistry.
To calculate the air pressure, the volume occupied by the air is assumed constant. Why is this assumption incorrect? Explain how the vapor pressure calculated and the resulting Clausius-Clapeyron plot are affected?
Tuesday, October 16, 2012 at 12:12am by Shardae.

phy
(Q1)calculate the electric power which must be supplied to the filament of a light bulb operating at 3000k. the total surface area of the filament is 0.000008m2 and iits emissivity is 0.92.(a)20.3w (b)33.8w(c)46.4w(d)56.7w (Q2) calculate the change in internal energy of 2kg of...
Wednesday, July 3, 2013 at 5:47am by kate

chemistry
An equilibrium mixture contains N2O4, (P= 0.30 ) and NO2 (P= 1.1 ) at 350 K. The volume of the container is doubled at constant temperature. Calculate the equilibrium pressure of when the system reaches a new equilibrium. Calculate the equilibrium pressure of NO2 when the ...
Thursday, May 20, 2010 at 9:42pm by Anonymous

Physics
A 275 kg piano slides 4.0 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. a) Calculate the magnitude of the force exerted by the man. b) Calculate the work ...
Wednesday, December 11, 2013 at 9:01pm by Josh

Physics
A 275 kg piano slides 4.0 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. a) Calculate the magnitude of the force exerted by the man. b) Calculate the work ...
Wednesday, December 11, 2013 at 9:02pm by Josh

Chemistry
A 71.0 L cylinder containing CH2O at a pressure of 0.550 atm is connected by a valve to 1.50 L cylinder containing N2 at 266.0 torr pressure. Calculate the partial pressure (atm) of N2 when the valve is opened.
Wednesday, January 20, 2010 at 7:17pm by Bob

Chemistry
A 69.4 L cylinder containing C2H6 at a pressure of 570 torr is connected by a valve to 105 L cylinder containing C6H6 at 0.350 atm pressure. Calculate the partial pressure (atm) of C6H6 when the valve is opened.
Saturday, April 16, 2011 at 4:31pm by itsliferight

math
"The volume V of a gas varies inversely as pressure P is exerted" --> v = k(1/p) , where k is a constant given: when v=4, p=3.5 4= k/3.5 k = 4(3.5) = 14 v = 14/p plug in p = 2.5 to find v
Monday, October 8, 2012 at 2:32am by Reiny

chemistry
if 3.0 moles of nitrogen gas are collected in a 35.0 liter container at 20 C what would be the the pressure exerted on the container in atmospheres
Saturday, October 27, 2012 at 6:17pm by glenn

physics
What is the pressure that is exerted by a box tjat has a dimension of 12cm long and 14cm wide and has a force of gravity on the box of 40N?
Tuesday, March 25, 2014 at 8:36pm by billy

Physics
What pressure is exerted by the tip a nail struck with a Force of 20,000N? Assume the tip is a 1.5mm-radius circle.
Tuesday, April 1, 2014 at 2:58am by Sandra

Chemistry
Use van der Waals’ equation to calculate the pressure exerted by 2.33 mol of ammo- nia at −3.7◦C in a 1.25 L container. The van der Waals’ constants for ammonia are a = 4.00 L2·atm/mol2 and b = 0.0400 L/mol. (The values for a and b have been rounded off to simplify...
Tuesday, November 20, 2012 at 6:57pm by Caitlin

Chemistry
At a depth of 200 meters in Lake Nyos, the pressure of pure CO2, released from a volcanic vent is equal to the water pressure at this depth. P (pascals) = density * g * height. Density= 1000 kg/m^3, g= 9.8m/s^2. Using this Pascal pressure, convert it, and calculate the ...
Friday, July 13, 2012 at 12:44am by Anonymous

chemistry
calculate the pressure in atm of a balloon filled with 7.5g of helium gas if the baloons volume decreases to 7.5L suppose the balloons pressure and volume are originally 799 mmHg and 15L
Tuesday, May 4, 2010 at 8:25pm by Quentin

AP Chem
You're right. The secret words are OVER WATER. Perhaps we should have subtracted the vapor pressure of water in the NaHCO3 problem, too, but I didn't when I worked that problem. I suppose, when we have a problem like the NaHCO3 problem, when it asks for the volume of CO2 ...
Wednesday, November 19, 2008 at 2:01pm by DrBob222

physics
A 45 m/s (100 mph) wind blows across the top of a flat-roofed house. Calculate the net force on the roof due to the pressure differential from inside the house to the outside. Assume that the pressure in the house is atmospheric pressure and that the roof has an area of 200 ...
Sunday, January 6, 2013 at 12:03pm by badgurl

PHYSICS
I don't know where to start solving this question. Please help! A 320 kg piano slides 3.7 m down a 32 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.39. Calculate the ...
Monday, November 8, 2010 at 3:52am by MegP

chemistry
Calculate the vapor pressure lowering of water when 5.67 g of glucose, C6H12O6, is dissolved in 25.2 g of water at 25 ºC. The vapor pressure of water at 25º C is 23.8 mmHg. What is the vapor pressure of the solution?
Thursday, March 29, 2012 at 5:51pm by MJ

science
What pressure will be exerted by 10 moles of hydrogen gas in a 7.5 L cylinder at 20°C? (Given: R = 8.314 L∙kPa/K∙mol)
Thursday, July 14, 2011 at 9:48am by jane doe

physics
Find the pressure exerted by a solid,when placed on a wooden platform.The area of contact is 200 cm and the solid weight 150 N?
Monday, October 31, 2011 at 1:08pm by ASWATHY

Physics
Find the pressure exerted by a waterbed with dimensions of 2m x 2m which is 30 cm thick. (hint:use density of water)
Friday, July 13, 2012 at 6:04am by Fix30

Chemistry
Consider an ideal gas encloesd in a 1.00 L container at an internal pressure of 10.0 atm. Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 20.0 L. w = ____ J now calculate the work done if this process is carried ...
Friday, February 10, 2012 at 12:58am by Lauren

chemistry
Given--The solubility of NH3 in H2O is 518 g/L at a partial pressure of 760.0 torr. Question #1)-- Calculate the value of the Henry's Law constant for NH3. Question #2)-- Calculate the solubility of NH3 in H2O at a partial pressure of 225.0 torr.
Tuesday, December 6, 2011 at 3:28pm by JD

Chemsitry II
The partial pressure of CH4(g) is 0.185 atm and that of O2(g) is 0.300 atm in a mixture of the two gases. a) What is the mole fraction of each gas in the mixture? b) If the mixture occupies a volume of 11.5 L at 65 degress C, calculate the total number of moles of gas in the ...
Thursday, May 10, 2007 at 7:13pm by Jayd

Chemistry
Dinitrogen tetroxide decomposes according to N2O4 (g) = 2NO2 (g) In a certain experiment, N2O4(g) at an initial pressure of 0.554 bar is introduced into an empty reaction container; after equilibrium is established, the total pressure is 0.770 bar. A quantity of NO2(g) is ...
Monday, March 19, 2012 at 10:40pm by Angel

Chemsitry II
mole fraction is equal to partial pressure divided by the total pressure Total pressure= sum of partial pressure use PV=nRT where n= number of moles equation become PV/RT=n make sure to convert the temperature to Kelvin and to use 0.0821 for R. V=volume, P=total pressure The ...
Thursday, May 10, 2007 at 9:25pm by Delli

MATH
The volume V of a gas varies inversely as pressure P is exerted. If V = 4 liters when P = 3 atmospheres, find V when P = 7 atmospheres. Note: Round your answer to the nearest hundredth
Tuesday, October 12, 2010 at 3:54pm by NICKY

physics
What pressure (atm) is exerted by a column of ethanol 65.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational
Sunday, October 17, 2010 at 9:43pm by chris

chemistry
the pressure exerted on a 240.ml sample of hydrogen gas at constant temerature is increased from 0.428 to 0.724.What will the final volume of the sample be?
Wednesday, October 20, 2010 at 8:08pm by shubreet

chemistry
what pressure (atm) is exerted by a column of ethanol 86.0 cm high? the density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
Wednesday, June 29, 2011 at 10:02am by cindy

chemistry
what pressure (atm) is exerted by a column of ethanol 86.0 cm high? the density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
Wednesday, June 29, 2011 at 1:00pm by cindy

chem
What pressure (atm) is exerted by a column of ethanol 86.0 cm high. The density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
Wednesday, July 6, 2011 at 9:10am by Tim

chem
What pressure (atm) is exerted by a column of ethanol 86.0 cm high. The density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
Wednesday, July 6, 2011 at 7:30pm by Carol

math
The volume V of a gas varies inversely as pressure P is exerted. If V = 4 liters when P = 3.5 atmospheres, find V when P = 2.5 atmospheres. Note: Round your answer to the nearest thousandth.
Monday, October 8, 2012 at 2:32am by Anonymous

Physics
Pressure = weight density × depth Calculate the water pressure at the bottom of the 50-m-high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units
Thursday, March 27, 2014 at 3:29pm by James

physics thermodynamics
A gas expands from a volume of 2.00m^3 to 6.00m^3 and does 6912 joules of work against a constant outside pressure. Calculate this outside pressure in Pa. The answer is 1730 Pa, but I don't know how to get that. I honestly have no idea where to start or what formulas to use. ...
Sunday, February 11, 2007 at 1:03pm by emily

Chemistry
The vapor pressure of water at 25°C is 23.76 mm Hg. What would you calculate as the new vapor pressure of a solution made by adding 50.5 g of ethylene glycol (HOCH2CH2OH, antifreeze) to 50.5 g of water? You may assume that the vapor pressure of ethylene glycol at this ...
Wednesday, January 26, 2011 at 2:46pm by Rukky

Physics
Two crates, of mass m1 = 60 kg and m2 = 130 kg, are in contact and at rest on a horizontal surface (Fig. 4-54). A 620 N force is exerted on the 60 kg crate. The coefficient of kinetic friction is 0.15 a)Calculate the acceleration of the system. b) calculate the force that each...
Monday, October 11, 2010 at 3:20pm by Syl

Physics
The absolute pressure inside the tire, multiplied by the area in contact with the ground, equals the force of the ground upon the tire. Four times that force equals the weight of the car, if each tire supports the same weight. The absolute pressure in this case is 2.8*10^5 Pa...
Monday, July 21, 2008 at 11:05pm 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

Chemistry
figure the moles of the reactants first. THen determine the limiting reageant (CS2). THen determine the moles of methane (.443) produced. partial pressure=molesmethane*RT/40 Remember that there is still H2 left over, and it will have a partial pressure also, as will the H2S ...
Sunday, April 11, 2010 at 2:40am by bobpursley

Physics
A research submarine is operating at a depth of 115m in sea water of density 1025kg/m^3. The absolute atmospheric pressure at sea level is 100kPa. The absolute air pressure inside the submarine is twice that at sea level. Find the net force exerted by the water outside and the...
Wednesday, June 6, 2012 at 8:41am by ToT_Alex

chemistry
pi=MRT You know pi (osmotic pressure. I would convert that to atmospheres (3.75/760 = ?? although 3.75 atm sounds more like an osmotic pressure).Solve for M = molarity. Then M = moles/L. You know M and L, calculate moles, then use moles = grams/molar mass. Knowing M and grams...
Monday, January 25, 2010 at 2:51am by DrBob222

CHEM
Use PV = nRT to calculate partial pressure of O2. partial pressure O2 + partial pressure N2 = Ptotal = 810 mm Hg. Solve for partial pressure N2. Use PV = nRT to solve for n = number of moles N2, then convert to grams.
Sunday, November 21, 2010 at 11:34am by DrBob222

chemistry
What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.
Monday, October 17, 2011 at 12:17am by james

Chemistry
What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.
Monday, October 17, 2011 at 1:10am by Sven

chemistry
A tank contains a mixture of 3.0 mol of nitrogen 2.0 mol of oxygen and 1 mol of carbon dioxide at 25 degrees and a total pressure of 10 ATM calculate the partial pressure in torr of each gas?
Thursday, January 19, 2012 at 8:19pm by Lisa

chemistry
A gaseous mixture containing 6 moles of oxygen, 8 moles of helium and 6 moles of carbon dioxide in a container under a pressure of 40 atm. Calculate the partial pressure of th3 individual gases.?
Thursday, May 30, 2013 at 12:22am by sagar

physics
(a) Calculate the force exerted by the man. (290*9.8*sin 30deg)-(290*9.8cos30deg*0.40)=436.5N (b) Calculate the work done by the man on the piano. 284.2*(-0.40)=-1136.8J (c) Calculate the work done by the friction force. -3937.6J (d) What is the work done by the force of ...
Monday, March 21, 2011 at 10:08pm by md8

physics
Boxing gloves are padded to lessen the force of a blow. (a) Calculate the force exerted by a boxing glove on an opponent's face, if the glove and face compress 7.00 cm during a blow in which the 8.00 kg arm and glove are brought to rest from an initial speed of 10.0 m/s. 1 N (...
Tuesday, April 10, 2012 at 1:26pm by Amelia

Chemistry
Calculate the volume at s.t.p. occupied by a gas 'Q' originally occupying 153.7cc at 287K and 750mm pressure [vapor pressure of gas 'Q'at 287K is 12mm of Hg]
Friday, June 29, 2012 at 12:36am by Mayank Goswami

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

physics
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon, and Earth are aligned with the Moon between the Sun and the Earth. (This alignment corresponds to a ...
Tuesday, May 3, 2011 at 3:21pm by Amy

Chemistry
At 298 K, deltaGo = - 6.36 kJ for the reaction: 2N2O(g) + 3O2(g) ↔ 2N2O4(g) Calculate deltaG (in kJ) at 298 K when PN2O = 3.12 atm, PO2 = 0.0081 atm, and PN2O4= 0.515 Calculate deltaG (in kJ) at 298 K for some solid ZnF2, 0.025 M Zn2+ and 0.038 M F-(aq). Would these two ...
Wednesday, April 3, 2013 at 2:44pm by Anonymous

chem
the total pressure of n2o4 and no2 IS 1.38 atm. if kp is 6.75(25 C) calculate partial pressure of NO2 in the mixture. 2NO2<---> n2o4
Sunday, November 28, 2010 at 10:30pm by anon

chemistry
A 200.0 mL flask contains 1.03 mg of O2 and 0.41 mg HE at 288K. Calculate the partial pressure of oxygen and helium in the flask. What is the total pressure?
Thursday, August 4, 2011 at 4:26pm by Henry

chemistry
20g of nitrogen gas and 10g of helium gas are placed together in a 5L container at 25C . Calculate the partial pressure of each gas and the total pressure of the gas mixture.
Sunday, November 20, 2011 at 10:44am by NONO

Chemistry
Calculate the volume at s.t.p. occupied by a dry gas 'Q' originally occupying 153.7cc at 287K and 750mm pressure [vapor pressure of gas 'Q'at 287K is 12mm of Hg]
Saturday, June 30, 2012 at 3:25am by Mayank

Physics
A block measuring 0.1m x 0.4m x 1.5m has a mass of 30kg. Calculate the pressure in each position and state in which position will the block produce greatest and least pressure on the ground.
Friday, June 7, 2013 at 2:41am by OHara

chemistry
for #2. the reason that a ax is more useful is because the pressure exerted is over a smaller area than with the hammer. The ax's blade is thin while the hammer's top is wider thus pressure is applied over a larger area so it's not as powerful. example is when people can lay ...
Saturday, March 22, 2008 at 3:17am by ~christina~

Physics
A 300 kg piano slides 4.4 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the magnitude of the force exerted by the man. (b) Calculate the work ...
Friday, March 21, 2014 at 9:05pm by Hope

Physics
A 300 kg piano slides 4.4 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.(a) Calculate the magnitude of the force exerted by the man.(b) Calculate the work ...
Friday, March 21, 2014 at 9:17pm by Hope

physics
A bb player crouches lowering center of gravity 0.3m. when he jumps, center of gravity reaches 0.9m above normal. A. Calculate velocity when feet left ground. B. Calculate acceleration produced to achieve velocity. C. What force exerted on floor if mass is 110 kg?
Monday, January 24, 2011 at 3:17pm by Scott

science; AP Chem
I don't know how to find the kpa for 35.78 m in this question. I know its a P1V1=P2V2 question, i just need the kpa for 35.78m pls! Question: Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below ...
Saturday, September 15, 2012 at 10:32pm by Anonymous

chemistry
A sample containing 0.0500mol of Fe2(SO4)3 is dissolved in enough water to make 1.00L of solution. This solution contains hydrated SO4 2- and Fe(H2O)6 3+ ions. The latter behaves as an acid: Fe(H2O)6 3+ --> Fe(H2O)5OH 2+ + H+ a) Calculate the expected osmotic pressure of ...
Wednesday, February 16, 2011 at 5:10pm by Chris

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
Estimate the pressure exerted on the floor by a 75 kg store clerk standing momentarily on a single heel of their shoe, where the heel area = 6 cm square?
Tuesday, November 29, 2011 at 9:54pm by ted

Chemistry
A 559.0 mL cylinder containing C5H12 at a pressure of 304.0 torr is connected by a valve to 610.0 mL cylinder containing CO2 at 532.0 torr pressure. Calculate the partial pressure (atm) of CO2 when the valve is opened.
Tuesday, April 12, 2011 at 3:46am by Matty

AP Chem - to Dr. Bob
I don't understand how to even start this problem: A mixture of H2(g), O2(g), and 2 mL of H2O is present in a 0.5 L rigid container at 25 degrees Celsius. The number of moles of H2 and the number of moles of O2 are equal. The total pressure is 1146 mmHg. Vapor pressure of ...
Tuesday, January 23, 2007 at 10:28pm by Belinda

Physics
Three fixed charges are located along a line. The - 2 C charge is 10cm to the left of the +5 C charge and the -4 C charge at 4 cm to the right of the +5 C charge. a.what is the force exerted on the -4 C by the +5C charge? b.what is the force exerted on the -4 C by the -2 C ...
Thursday, June 21, 2012 at 8:07pm by Jennifer

science
3. Liquefied air (assuming it is only O2 and N2) is kept in a container where pressure and temperature can be controlled. a. What is the maximum temperature at which the mixture exists as a liquid? If this temperature is kept constant, what is the minimum pressure to keep the ...
Tuesday, March 11, 2014 at 2:13pm by haha

General Chemistry
A balloon is filled with helium gas at 23 degrees C. The balloon expands until the pressure is equal to the atmospheric pressure of 755 toor. The balloon rises to an altitude of 6000 feet where the pressure is 550 toor and the temperature is 5 degrees C. Calculate the percent ...
Sunday, September 4, 2011 at 11:53pm by Ronnica

physics
it has to gain sufficent force to rise which equals the weight of the height of the water. We will calculate in gauge pressure... pressure=force/area= density*area*height*g/area= density*g*height height = 26m density= 1.04E6kg/m^3 g= 9.8N/kg so calcualate pressure, it ought to...
Wednesday, April 16, 2014 at 9:10am by bobpursley

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

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