Thursday

April 24, 2014

April 24, 2014

Number of results: 8,144

**Science**

A circular hatch in the hull of a submarine has a radius of 40.0 cm. The submarine is 850.0 m under water. If atmospheric pressure above the ocean is 1.01 x 105 Pa and the air pressure inside the submarine is 1.31x 105 Pa, what net force is exerted on the hatch? (ρsw = ...
*Monday, December 19, 2011 at 9:46pm by Zoe*

**Physics**

A bicycle tire whose volume is 4.1 x 10-4 m3 has a temperature of 296 K and an absolute pressure of 4.69 x 105 Pa. A cyclist brings the pressure up to 6.75 x 105 Pa without changing the temperature or volume. How many moles of air must be pumped into the tire?
*Friday, December 1, 2006 at 12:41am by maysam*

**Physics**

A circular hatch in the hull of a submarine has a radius of 40.0 cm. The submarine is 850.0 m under water. If atmospheric pressure above the ocean is 1.01 x 105 Pa and the air pressure inside the submarine is 1.31x 105 Pa, what net force is exerted on the hatch? (ρsw = ...
*Monday, December 19, 2011 at 2:27pm by Sally*

**PHYSICS - HELP**

A wind with speed 45 m/s blows across a roof 20 m long and 12 m wide. The pressure inside the room is 1 atm. What is the net force on this roof due to the pressure difference inside and outside the roof? (The density of air is equal to 1.3 kg/m3.) Question 1 options: A) 2.4 ...
*Wednesday, August 10, 2011 at 3:29pm by Deana*

**physics**

A driver measures her "cold" tire gauge pressure to be 1.95 105 Pa. The measurement is made before driving, when the tires are at the temperature of the surroundings, 21.7° C. After driving several miles, she checks the gauge pressure again and finds that it has increased to 2...
*Friday, April 15, 2011 at 1:49pm by ECU*

**Math**

Find the value of x. The area of a rectangle = 105 The length is 2x+1 Width is x __________________________________ I tried solving it : Arec = l x w 105 = (2x+1)x 105 = 2x^2 + x 0= 2x^2 + x - 105 This is where I get stuck on...
*Friday, November 4, 2011 at 2:39am by Lynn*

**chemistry**

A sample of oxygen occupies 10.0 L under a pressure of 105 kPa. At what pressure will it occupy 13.4 L if the temperature does not change?
*Wednesday, May 19, 2010 at 8:16pm by maria*

**applied chemistry**

A sample of oxygen occupies 10.0 L under a pressure of 105 kPa. At what pressure will it occupy 13.4 L if the temperature does not change?
*Tuesday, August 3, 2010 at 10:38pm by chris*

**thermal physics**

An automobile tire has a volume of 1.60 x 10-2 m3 and contains air at a gauge pressure (pressure above atmospheric pressure) of 167 kPa when the temperature is 0.00°C. What is the gauge pressure (in kPa) of the air in the tires when its temperature rises to 27.0°C and its ...
*Thursday, April 2, 2009 at 2:04am by sweety*

**physics**

An automobile tire has a volume of 1.60 x 10-2 m3 and contains air at a gauge pressure (pressure above atmospheric pressure) of 167 kPa when the temperature is 0.00°C. What is the gauge pressure (in kPa) of the air in the tires when its temperature rises to 27.0°C and its ...
*Wednesday, April 1, 2009 at 8:31pm by chirayu*

**Chemistry**

An ideal gas is allowed to expand from 6.00 L to 45.0 L at constant temperature. By what factor does the volume increase? ? Number The pressure will Increase by that factor or decrease by that factor? If the initial pressure was 105 atm, what is the final pressure?
*Tuesday, October 16, 2012 at 10:08pm by Bill*

**Physics**

A steam engine goes through the following 3 step process. I) Isobaric compression from a volume of 100 L to 10 L at a pressure of 4 x 105 Pa II) Isovolumetric process from a pressure of 4 x 105 Pa to a pressure of 4 x 106 Pa at a volume of 10L. III) An isothermal expansion ...
*Monday, December 11, 2006 at 2:57pm by Eric*

**biology**

What must the systolic blood pressure be valued at for adequate mean arterial pressure if the diastolic pressure is 75? (Assume resting conditions) A. at least 90 B. at least 95 C. at least 100 D. at least 105 E. at least 110 F. at least 115 G. at least 120
*Wednesday, April 11, 2012 at 11:02am by Jim*

**Physics**

Saturn’s largest moon, Titan, is actually larger than the planet Mercury. It is also one of the few bodies in the solar system that has a dense atmosphere. Data from the Voyager 1 probe indicates that the atmospheric pressure on Titan’s surface is about 1.60 x 105 Pa, even ...
*Monday, December 19, 2011 at 2:28pm by Amy*

**Calculus**

The cost (in dollars) of producing x units of a certain commodity is c(x)=5000+10x+0.05x^2 Find A=100 to x=105 so far i got y-y/x-x= C(105)-C(100)/105-105 i don't understand how it comes out to be 101.25/5 please help me
*Saturday, October 27, 2007 at 10:08pm by THU*

**chemistry**

What is the final pressure gas sample that is subjected to a temperature change from 22.0 C to 30.0 C and a volume change from 85.4 L to 37.0 L with an initial pressure 105 kPa?
*Tuesday, April 30, 2013 at 8:51pm by SK*

**Chemistry**

If 0.75 g of a gas dissolves in 1.0 L of water at 20.0 kPa of pressure, how much will dissolve at 105.4 kPa of pressure?
*Monday, March 17, 2014 at 7:41pm by Anonymous*

**Chemistry 105**

A sample of nitrogen gas in a 1.86-L container exerts a pressure of 1.32 atm at 20 C. What is the pressure if the volume of the container is maintained constant and the temperature is raised to 354 C?
*Sunday, October 23, 2011 at 5:30pm by JULIE*

**chem**

i don't get this at all can you please show me how to do this problem: a sample of oxygen occupies 10.0 L under a pressure of 105 kPa. at what pressure will it occupy 13.4 L if the temperature does not change. please help me set it up
*Thursday, May 14, 2009 at 6:33pm by melissa*

**physics**

Oxygen gas having a volume of 784 cm3 at 23.3°C and 1.03 x 105 Pa expands until its volume is 1170 cm3 and its pressure is 1.07 x 105 Pa. Find (a) the number of moles of oxygen present and (b) the final temperature of the sample. (Unit kelvin, K, for part (b).)
*Friday, April 3, 2009 at 1:17am by sweety*

**Basic Math**

Im so confused with these questions: which of the following numbers are composite? 0,1,15,19,23,31,49,55,59,87,91,97,103,105 A. 1,23,31,59,91 B. 15,49,55,87,91,105 c. 0,1,19,23,31,105
*Tuesday, January 22, 2008 at 8:53pm by Michelle*

**algebra**

I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8
*Thursday, October 21, 2010 at 4:01pm by Josh*

**algebra**

I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8
*Thursday, October 21, 2010 at 4:01pm by Josh*

**Physics**

The boom of a crane is 20 m long and is inclined 20ᵒ from the horizontal. A bucket of cement with a mass of 3000 kg is suspended from the upper end of the boom. What is the torque acting on the point where the boom is attached to the crane? A. 5.5 x 105 Nm. B. 3.5 x 105 ...
*Tuesday, November 13, 2012 at 8:03pm by Tom*

**physics**

A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.26 105 Pa and the speed is 0.029 m/s. What is the pressure at the narrow end of the segment? Pa Please help! physics - drwls, Monday, April 9, ...
*Tuesday, April 10, 2012 at 3:44pm by Malika*

**Physics**

A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.26 105 Pa and the speed is 0.029 m/s. What is the pressure at the narrow end of the segment? Pa Please help! physics - drwls, Monday, April 9, ...
*Tuesday, April 10, 2012 at 6:24pm by Malika*

**Physics**

A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.26 105 Pa and the speed is 0.029 m/s. What is the pressure at the narrow end of the segment? Pa Please help! physics - drwls, Monday, April 9, ...
*Tuesday, April 10, 2012 at 9:28pm by Malika*

**Chemistry 105**

A sample of gas has an initial volume of 33.0 L at a pressure of 1.1 atm. If the sample is compressed to a volume of 10.0 L, what will its pressure be? (Assume constant temperature.)
*Sunday, October 23, 2011 at 5:24pm by JULIE*

**College Physics**

A monatomic ideal gas is compressed adiabatically from a pressure of 1.39 105 Pa and volume of 260 L to a volume of 39.0 L. What is the new pressure of the gas?
*Tuesday, December 6, 2011 at 7:21pm by John*

**Chemistry 105**

A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 9.3 atm?
*Sunday, October 23, 2011 at 5:27pm by JULIE*

**Physics**

At what depth beneath the surface of a lake is the absolute pressure 2 times the atmospheric pressure of 1.01 105 Pa that acts on the lake's surface?
*Saturday, November 3, 2007 at 12:25am by pete*

**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*

**Physics**

Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.70 105 Pa and the pipe radius is 2.50 cm. At the higher point located at y = 2.50 m, the pressure is 1.30 105 Pa and the pipe radius is 1.60 cm. (a) ...
*Friday, November 9, 2012 at 7:04pm by Ashley*

**Physics**

Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.70 105 Pa and the pipe radius is 2.50 cm. At the higher point located at y = 2.50 m, the pressure is 1.30 105 Pa and the pipe radius is 1.60 cm. (a) ...
*Friday, November 9, 2012 at 10:53pm by Ashley*

**Physics**

Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.85 105 Pa and the pipe radius is 2.80 cm. At the higher point located at y = 2.50 m, the pressure is 1.28 105 Pa and the pipe radius is 1.20 cm. (a) ...
*Tuesday, November 20, 2012 at 5:45pm by Chelsea*

**Physics**

Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.85 105 Pa and the pipe radius is 2.80 cm. At the higher point located at y = 2.50 m, the pressure is 1.28 105 Pa and the pipe radius is 1.20 cm. (a) ...
*Wednesday, November 21, 2012 at 12:35pm by Chelsea*

**physics help pleeeeease!!**

A monatomic ideal gas is compressed adiabatically from a pressure of 1.09 105 Pa and volume of 250 L to a volume of 39.0 L. (a) What is the new pressure of the gas? (b) How much work is done on the gas?
*Wednesday, February 16, 2011 at 9:01pm by lissa*

**PHYSICS!!!**

Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.70 105 Pa and the pipe radius is 2.80 cm. At the higher point located at y = 2.50 m, the pressure is 1.22 105 Pa and the pipe radius is 1.70 cm. (a) ...
*Sunday, November 11, 2012 at 5:29pm by k*

**CHEMISTRY**

selenium tetrafluoride, SeF4 is a colorless. it has vapor pressure of 757mmhg at 105 deg c and 522mmhg a 95 deg c. what is the vapor pressure of carbon disulfide at 35 deg c?
*Wednesday, September 19, 2007 at 12:54am by Del*

**chem.**

A sample of argon at 300. °C and 50.0 atm pressure is cooled in the same container to a temperature of 0. °C. What is the new pressure? 105 atm 45.5 atm 54.9 atm 23.8 atm 42.7 atm
*Tuesday, September 29, 2009 at 9:19am by Anonymous*

**Math**

1 2/5 divided by 21 Which is correct? A. 21/1 x 5/7 = 105/7 =15 or B. 1/21 x 7/5 = 7/105 / 7/7 = 1/15 Neither is correct. The answer is (2/5)/21 = 2/(5*21) = 2/105. Are you sure you copied the problem correctly? 1 2/5 divided by 21 sorry. I missed the "1" out front. The answer...
*Thursday, February 22, 2007 at 6:56pm by Alisha*

**Pre-Calc**

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...
*Wednesday, September 7, 2011 at 7:53pm by Sheila*

**physics**

A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.26 105 Pa and the speed is 0.029 m/s. What is the pressure at the narrow end of the segment? Pa Please help!
*Monday, April 9, 2012 at 4:57pm by Malika*

**Engineering Physics**

An ideal gas at 12.1 °C and a pressure of 2.38 x 105 Pa occupies a volume of 2.88 m3. (a) How many moles of gas are present? (b) If the volume is raised to 4.70 m3 and the temperature raised to 28.3 °C, what will be the pressure of the gas?
*Wednesday, May 22, 2013 at 9:01pm by kurt*

**Physics**

A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.34 105 Pa and the speed is 0.038 m/s. What is the pressure at the narrow end of the segment?
*Wednesday, November 7, 2007 at 1:12pm by Dante*

**physics**

Assuming bicycle tires are perfectly flexible and support the weight of bicycle and rider by pressure alone, calculate the total area of the tires in contact with the ground. The bicycle plus rider has a mass of 80.0 kg, and the gauge pressure in the tires is 3.50×105 Pa
*Sunday, April 6, 2014 at 11:50pm by Mohanad*

**Chemistry 105**

What is the pressure in a 10.0-L cylinder filled with 0.470 mol of nitrogen gas at a temperature of 329 K?
*Sunday, October 23, 2011 at 5:20pm by JULIE*

**Pre-Calc-Please check my answer-I think its correc**

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...
*Wednesday, September 7, 2011 at 1:47pm by Sheila*

**Physics**

An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and temperature raised to 30.5°C, what will be the pressure of the gas? Pa I used the formula n= (pv)/rt which ...
*Sunday, April 20, 2008 at 11:25am by Johnson*

**physics**

An ideal gas at 18.5°C and a pressure of 1.54 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 5.30 m3 and the temperature raised to 31.0°C, what will be the pressure of the gas? Pa I used the formula pv = nRT (1....
*Sunday, April 27, 2008 at 11:53am by Will*

**physics**

A locomotive that has a mass of 6.4 x 105 kg is used to pull 2 railway cars. Railway car 1 has a mass of 5.0 x 105 kg, is attached to railway car to that has a mass of 3.6 x 105 kg by a locking mechanism. A railway engineer tests the mechanism and estimates that it can only ...
*Wednesday, October 30, 2013 at 11:19pm by Anthony*

**physics**

A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.50 x 105 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 4.20 x 10-4 m2, obtain the magnitude of the force that the screw thread ...
*Thursday, February 9, 2012 at 9:07am by hannah*

**phyics**

A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.60 x 105 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 3.60 x 10-4 m2, obtain the magnitude of the force that the screw thread ...
*Tuesday, November 12, 2013 at 8:31pm by John*

**Physics**

An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and the temperature raised to 30.5°C, what will be the pressure of the gas? Pa
*Sunday, April 20, 2008 at 10:47am by Tasha*

**physics**

An ideal gas at 18.5°C and a pressure of 1.54 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 5.30 m3 and the temperature raised to 31.0°C, what will be the pressure of the gas? Pa
*Saturday, April 26, 2008 at 8:45am by Sophia*

**Pre-Calc-Please check my answer-I think I have it**

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...
*Wednesday, September 7, 2011 at 4:07pm by Sheila*

**Pre-Calc-Please check my answer-I think I have it**

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...
*Wednesday, September 7, 2011 at 4:07pm by Sheila*

**Chemistry 105**

A sample of N20 gas has a density of 2.65 g/L at 298 K. What must be the pressure of the gas (in mmHg )?
*Sunday, October 23, 2011 at 5:29pm by JULIE*

**Physics help**

If a spherical glass marble has a radius of 0.00665 m at 1.02×105 Pa, at what pressure will it have a radius of 0.00650 m? Thanks
*Saturday, June 9, 2012 at 3:35pm by Alex*

**Physics help**

At 265 K, the pressure of 0.0454 mol of an ideal gas is 1.42×105 Pa. What volume does the gas occupy?
*Thursday, June 21, 2012 at 10:47am by Teresa*

**Physics**

If your last electric bill for sept. was $105. If the average price is 6.5 cents per kw, how many kw did your household use in September? 1kw/.065 = x/$105 .065x=105 x=1615.38 kw is this correct? How many Joules is that? I know that 1W =1Joule/second 1kw=1000W so 1615.38kw /...
*Wednesday, October 17, 2007 at 4:54pm by Andrea*

**math**

Please check for me: Solve the questions below and identify them as experimental or theoretical. a. A baseball player reaches base 35% of the time. How many times can he expect to reach base in 850 at-bats? Theoretical – P(reaches base) = X/850 X/850 * .35 = 297.50 b. Jenna ...
*Wednesday, July 17, 2013 at 12:32am by cici*

**Chemistry 105**

Consider the following chemical reaction. 2H2O(l) -->2H2(g)+O2(g) What mass of H2O is required to form 1.6 L of O2 at a temperature of 330 K and a pressure of 0.954 atm?
*Sunday, October 23, 2011 at 5:48pm by JULIE*

**Chemistry **

If an ideal gas has a pressure of 5.63 × 105 Pa, a temperature of 401 K, and a volume of 0.0313 m3, how many moles of gas are in the sample?
*Wednesday, October 16, 2013 at 12:34pm by Blake*

**Math**

Solve the equation using order of operations. -22+105+(-37)+23+22+37+(-105)
*Saturday, September 19, 2009 at 7:37pm by Annia*

**philosopher 105**

do you have any work on week 7 checkpoint phi 105?
*Wednesday, May 5, 2010 at 9:40pm by lisa smith*

**chem**

What is the energy of one mole of photons with a wavelength of 375 nm? (h = 6.63 x 10-34 J • s, N = 6.02 x 1023) A. 5.30 x 10-19 J B. 2.39 x 105 J C. 2.66 x 10-18 J D. 5.30 x 105 J E. 1.60 x 106 J
*Tuesday, November 18, 2008 at 6:33pm by trevor*

**chem**

The reaction AB(aq)->A(g)+ B(g)is second order in AB and has a rate constant of 0.0282 M^{-1} s^{-1} at 25 Celsius. A reaction vessel initially contains 250 mL of 0.105 M AB which is allowed to react to form the gaseous product. The product is collected over water at 25 ...
*Friday, January 13, 2012 at 11:15pm by Yuni*

**Physics**

A Goodyear blimp typically contains 4770 m3 of helium (He) at an absolute pressure of 1.10 x 105 Pa. The temperature of the helium is 274 K. What is the mass (in kg) of the helium in the blimp? A Goodyear blimp typically contains 4770 m3 of helium (He) at an absolute pressure ...
*Friday, December 1, 2006 at 12:42am by maysam*

**Physics **

What is the frequency of the electromagnetic radiation from outer space that reaches the earth with a wavelength of 1 x 105 m, and a velocity of 1 x 105 m/s?
*Thursday, February 9, 2012 at 8:23pm by Hannah*

**Physics**

Water is moving with a speed of 5.0 m/s through a pipe with a cross-sectional area of 4.2 cm2. The water gradually descends 8.2 m as the pipe increases to 9.0 cm2. (a) What is the speed at the lower level? (b) If the pressure at the upper level is 1.8 × 105 Pa, what is the ...
*Sunday, November 7, 2010 at 4:42am by Megan*

**general physics**

A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, with the open end of the tube under the surface of the basting sauce, the sauce rises in the tube to a distance h, as the drawing shows. Using 1.013 × 105 Pa for the ...
*Saturday, July 20, 2013 at 7:27pm by please help with these practice problems*

**chemestry**

nitrous oxide (N2O) is used as an anesthetic. the pressure on 2.50 L of N2O changes from 105 k Pa to 40.5 kPa. If the temperature does not change, what will the new volume
*Monday, July 18, 2011 at 12:38pm by Anonymous*

**Math-- Please Check**

1 2/5 divided by 21 Which example is correct 7/5 * 1/21 = 7/105 = 1/15 or is it? 5/7 * 21/1 = 105/7 =15 You asked this question yesterday. The answer is still the same.
*Friday, February 23, 2007 at 8:00pm by Bobby*

**Trig**

Using a double angle formula how would you find the exact value of this expression? Cos²105° - sin²105°
*Sunday, April 19, 2009 at 2:51pm by Brian*

**Physics**

An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and the temperature raised to 30.5°C, what will be the pressure of the gas? Pa I was able to get 173.81 for the...
*Monday, April 28, 2008 at 1:16pm by Tasha*

**Physics**

The main water line enters a house on the first floor. The line has a gauge pressure of 1.70 105 Pa. (a) A faucet on the second floor, 6.5 m above the first floor, is turned off. What is the gauge pressure at this faucet? (b) How high could a faucet be before no water would ...
*Saturday, November 3, 2007 at 9:02pm by john*

**Chemistry.**

Ca(HCO3)2(s) decomposes at elevated temperatures according to the stoichiometric equation Ca(HCO3)2(s)-> CaCO3(s) + H2O(g) + CO2(g) a.) If pure Ca(HCO3)2(s) is put into a sealed vessel, the air is pumped out, and the vessel and its contents are heated, the total pressure is...
*Monday, November 22, 2010 at 4:14pm by Jill*

**chemistry 105**

A 260-mL flask contains pure helium at a pressure of 743 torr. A second flask with a volume of 480 mL contains pure argon at a pressure of 715 torr. If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? in torr ...
*Sunday, October 23, 2011 at 5:52pm by JULIE*

**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*

**Physics**

The pressure-volume graph shows an engine cycle where the working substance is an ideal monatomic gas (γ = 5/3). The process A-B is adiabatic. At point A, the pressure is 2.70×105 Pa and the volume is 0.0180 m3. At point B, the volume is 0.0450 m3. During a cycle, ...
*Monday, June 25, 2012 at 11:18am by Jamie*

**physics**

A 747 jetliner lands and begins to slow to a stop as it moves along the runway. The mass is 2.8 105 kg, its speed is 28.5 m/s, and the net braking force is 4.15 105 N.
*Sunday, September 18, 2011 at 6:13pm by Anonymous*

**physics**

A 747 jetliner lands and begins to slow to a stop as it moves along the runway. The mass is 3.8 105 kg, its speed is 25.9 m/s, and the net braking force is 4.27 105 N.
*Saturday, October 15, 2011 at 10:11am by helpplease*

**chemistyr**

Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm , to what pressure should you fill ...
*Wednesday, October 8, 2008 at 9:34pm by unknown*

**chemistry**

magine that you have a 7.00 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what pressure should you fill ...
*Friday, April 30, 2010 at 9:25pm by Anonymous*

**Chemistry**

Imagine that you have a 5.00 L gas tank and a 4.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what pressure should you fill ...
*Thursday, April 26, 2012 at 6:36pm by Wolfgang*

**Physics**

The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 3.50 105 Pa, and the horizontal divisions represent 2.00 10-3 m3. Determine the work done (including algebraic sign) in each segment of the path. (a) A ...
*Sunday, April 20, 2008 at 11:51am by Johnson*

**chem 105**

A gas mixture with a total pressure of 745mmHg contains each of the following gases at the indicated partial pressures: CO2, 257 mmHg; Ar, 123mmHg; and O2, 160 mmHg. The mixture also contains helium gas. What is the partial pressure of the helium gas? What mass of helium gas ...
*Sunday, October 23, 2011 at 6:52pm by JULIE*

**Math**

Jerry earned $18,500 one year and then recieved a 10.5% raise. What is his new yearly salary? would this be the correct way to set this up and the correct answer? $18500*10.5=$20442.50 You got the correct answer, but didn't type the correct equation. Which tells me you did it ...
*Sunday, May 27, 2007 at 12:00am by Stephanie*

**MATH**

Find the volumes of the solids generated by revolving the region in the first quadrant bounded by the following about the given axes. x = y - y3, x = 1, y = 1 (b) Revolved about the y-axis ? Hi Shawn, 97/105 * pi ? :) We need to cut away the volume of the region you get by ...
*Friday, February 9, 2007 at 3:48pm by Shawn*

**physics**

The four tires of an automobile are inflated to a gauge pressure of 1.8 multiplied by 105 Pa. Each tire has an area of 0.025 m2 in contact with the ground. Determine the weight of the automobile. No idea how to start, please help.
*Sunday, July 20, 2008 at 10:21pm by Elisa*

**Physics**

During each heartbeat, approximately 71 cm3 of blood is pushed from the heart at an average pressure of 105 mm-Hg. Calculate the power output of the heart, in watts, assuming 68 beats per minute.
*Sunday, April 8, 2012 at 11:46pm by Constance*

**Physics**

A pipe contains water at 4.80 105 Pa above atmospheric pressure. If you patch a 3.55 mm diameter hole in the pipe with a piece of bubble gum, how much force must it be able to withstand?
*Wednesday, December 12, 2012 at 7:10pm by Lauren*

**math 115**

1. divide26/634=24r10 is this correct? 2. subtract. 104.567-78.658= 25.909 is this correct? 3.identify the rate, base and amount in the following statement. 30% of 350 =105 350x.3=105 rate=30% base=350 amount=105. is this correct? 4. what is 60% of 250? =150. is this correct? ...
*Sunday, September 6, 2009 at 12:27pm by Lea*

**Physics please help.**

At 265 K, the pressure of 0.0454 mol of an ideal gas is 1.42×105 Pa. What volume does the gas occupy? Please help!
*Friday, June 22, 2012 at 10:51am by Teresa*

**Physics**

it didnt let me put the link to image.. A tube of radius 5 cm is connected to tube of radius 1 cm as shown above. Water is forced through the tube at a rate of 10 liters/min. The pressure in the 5 cm tube is 1×105 Pa. The density of water is 1000 kg/m3. Assume that the water ...
*Tuesday, April 27, 2010 at 7:21pm by Chris*

**Physics**

How large a pressure increase (in ATM) must be applied to water if it is to be compressed in volume by 1%? The bulk modulus of water is 2 × 109 N/m2 and 1 ATM = 105 N/m2
*Wednesday, December 10, 2008 at 8:34pm by Charlie*

**Chemistry 105**

An experiment shows that a 114 mL gas sample has a mass of 0.168 g at a pressure of 697mmHg and a temperature of 30 C. What is the molar mass of the gas? in g/mol
*Sunday, October 23, 2011 at 5:44pm by JULIE*

**Chemistry 105**

A gas mixture with a total pressure of 745 mmHg contains each of the following gases at the indicated partial pressures: CO2, 257 mmHg; Ar, 123 mmHg; and O2, 160 mmHg. The mixture also contains helium gas. What is the partial pressure of the helium gas? What mass of helium gas...
*Sunday, October 23, 2011 at 5:34pm by JULIE*

**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*

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