Friday
April 18, 2014

Search: A helium balloon can just lift a load of 790 N. The skin of the balloon has a mass of 1.6 kg.

Number of results: 44,036

physics
find the mass of a balloon filled with helium if its volume is .25 m cubed the density of the helium is .178
Sunday, September 2, 2012 at 6:10pm by Ashley

physics
an 80 kg boy holding on to a helium balloon jumps off of a 20m tall building and floats to the ground. If the boant force of the balloon is 750 N upward, what is the boy's acceleration and final velocity just before he touches the ground?
Tuesday, October 4, 2011 at 10:59pm by zahid

chemistry
Calculate the pressure in atm of a balloon filled with 7.50g of helium gas if the balloon's volume decreases to 7.50L. Suppose the balloon's pressure and volume are originally 799 mmHg and 15.0L.
Tuesday, May 4, 2010 at 8:25pm by Quentin

chem
A very flexible helium-filled balloon is released from the ground into the air at 20degree C The initial volume of the balloon is 5.00L , and the pressure is 760mmHg. . The balloon ascends to an altitude of 20Km , where the pressure is 76.0mmHg and the temperature is 50degree ...
Thursday, November 1, 2012 at 10:02am by chemdummy

chem
A very flexible helium-filled balloon is released from the ground into the air at 20degree C The initial volume of the balloon is 5.00L , and the pressure is 760mmHg. . The balloon ascends to an altitude of 20Km , where the pressure is 76.0mmHg and the temperature is -50degree...
Thursday, November 1, 2012 at 10:06am by chemdummy

Calculus
A helium balloon rises vertically at 3.5m/s as the wind carries it horizontally at 5.0m/s. What is the resultant velocity of the balloon?
Friday, May 31, 2013 at 10:58pm by Alice

Science
If you were to move the load by applying force from the top, what kind of machine might be the most appropriate to lift the load 5 cm?
Monday, March 21, 2011 at 12:39am by Jane

Physics Classical Mechanics
Helium balloons are used regularly in scientific research. A typical balloon would reach an altitude of 45.0 km with an air density of 4.3×10−3 kg/m3. At this altitude the helium in the balloon would expand to 540000.0 m3. Take g=10 m/s2. Find the buoyant force on the ...
Wednesday, December 11, 2013 at 7:53am by ss01

physics
Helium balloons are used regularly in scientific research. A typical balloon would reach an altitude of 45.0 km with an air density of 4.3×10−3 kg/m3. At this altitude the helium in the balloon would expand to 540000.0 m3. Take g=10 m/s2. Find the buoyant force on the ...
Saturday, December 14, 2013 at 6:40am by Anonymous

Physics
Let V be the balloon volume. Let rho1 = air density and rho2 = helium density. Look them up or use the gas law to compute them. Helium weighs 4/29 as much as air at the same T and p. For the balloon and its weight to be lifted, rho1*V = 4000 + 600 + rho2*V V = 4600/(rho1-rho2)
Wednesday, November 10, 2010 at 11:54pm by drwls

CHEM
How many grams of helium must be added to a balloon containing 8.00 g of helium gas to double its volume. Assume no temp or pressure change.
Tuesday, October 19, 2010 at 11:51pm by Lilli

AP Physics B
An empty rubber balloon has a mass of 0.01 kg . The balloon is filled with helium at a density of 0.181 kg/m3 . At this density the balloon has a radius of 0.493 m . If the filled balloon is fastened to a vertical line, what is the tension in the line? The ...
Tuesday, January 15, 2013 at 8:34pm by Clark

chemistry
A very flexible helium-filled balloon is released from the ground into the air at 20 degree C. The initial volume of the balloon is 5.00 L, and the pressure is 760 mmHg. The balloon ascends to an altitude of 20km, where the pressure is 76.0 mmHg and the temperature is -50 ...
Saturday, October 20, 2012 at 8:52am by Liang

physics
a giant crane was tested by lifting 2.232*10^6 kg load.find the magnitude of the force needed to lift the load with a net acceleration of 0m/s^2. if the same force is applied to pull the load up a smooth slope that makes 30 degrees with the horizontal, what would be the accel
Thursday, December 17, 2009 at 8:01pm by bandit

physics
a giant crane was tested by lifting 2.232*10^6 kg load.find the magnitude of the force needed to lift the load with a net acceleration of 0m/s^2. if the same force is applied to pull the load up a smooth slope that makes 30 degrees with the horizontal, what would be the accel
Thursday, December 17, 2009 at 8:01pm by bandit

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

Chemistry
A helium balloon is filled to a volume of 2.88 x 10^3L at 722 mm Hg and 19 degrees Celcius. When the balloon is released, it rises to an altitude where the pressure and temperature are 339 mm Hg and -55vC, respectively. What is the volume of the balloon?
Thursday, February 10, 2011 at 7:57pm by Ageha

Chemistry
A rubber balloon was filled with helium at 25˚C and placed in a beaker of liquid nitrogen at -196˚C. The volume of the cold helium was 15 cm3 Assuming ideal gas behavior and isobaric conditions, what was the volume of the helium at 25˚C?
Wednesday, September 12, 2012 at 4:36pm by Dia B

Science
Helium gas is added to a ballon already partially filled with helium gas the balloon inflated because the
Sunday, February 5, 2012 at 9:34pm by Star

physics
A mountain-climber friend with a mass of 82 kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs. He wonders what the approximate size of such a balloon would be. Hearing of your physics skills, he asks you...
Wednesday, March 28, 2012 at 7:08pm by Kristie

physics
A mountain-climber friend with a mass of 82 kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs. He wonders what the approximate size of such a balloon would be. Hearing of your physics skills, he asks you...
Thursday, March 29, 2012 at 7:26pm by Jim

physics
A mountain-climber friend with a mass of 82 kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs. He wonders what the approximate size of such a balloon would be. Hearing of your physics skills, he asks you...
Sunday, April 1, 2012 at 10:45pm by christy

chemistry
a weather balloon with a 2 meter diameter at ambiient tempatures holds 525 grams of helium. what type of electroniic probe could be used to determine the pressure inside the balloon
Tuesday, January 18, 2011 at 4:05pm by eric

Chemistry
A toy balloon originally held 1.00 g of helium gas and had a radius of 10.0 cm. During the night, 0.25 g of the gas effused from the balloon. Assuming ideal gas behavior under these constant pressure and temperature conditions, what was the radius of the balloon the next morning?
Wednesday, September 12, 2012 at 2:50pm by Dia B

physics
A helium balloon and its gondola, of mass M, are in the air and stationary with respect to the ground. A passenger, of mass m, then climbs out and slides down a rope with speed v, measured with respect to the balloon. With what speed (relative to Earth) does the balloon then ...
Thursday, March 11, 2010 at 4:57pm by Anonymous

physics
Volume of air in the balloon = V =(4/3)*PI*r^3 = (4/3)*PI*0.5^3 mass of air displaced is 1.29 * V mass of helium is 0.181*V Upward force due to pressure difference between helium and air is (1.29 - 0.181)*V Sum of forces in the y direction is 0: (1.29 - 0.181)*V - T - 0.0120...
Saturday, December 15, 2012 at 9:28pm by Jennifer

Chemistry
2 moles of helium (He) are pumped from a gas canister into a weather balloon. The balloon at this point has a volume V1. 1 mole of nitrogen gas (N2) is added at the same temperature and pressure. The volume of the balloon changes to V2. How will the new volume of the balloon ...
Wednesday, April 17, 2013 at 11:38pm by Colin

science physics
A giant crane in Washington DC was tested by lifting a 2.232x10^6 kg load. Find the magnitude of the force needed to lift the load with a net acceleration of 0m/s^2
Wednesday, December 8, 2010 at 9:18pm by Melina

science physics
A giant crane in Washington DC was tested by lifting a 2.232x10^6 kg load. Find the magnitude of the force needed to lift the load with a net acceleration of 0m/s^2
Wednesday, December 8, 2010 at 10:58pm by Melina

science
hellium gas is added to a balloon already partially filled with helium gas.why does the balloon inflate?
Sunday, August 21, 2011 at 12:57pm by cham

Physics
A research balloon of total mass 445 kg is descending vertically with a downward acceleration of 1.3 m/s2. How much ballast must be thrown from the car to give the balloon an upward acceleration equal to 1.5 m/s2, presuming that the upward lift of the balloon does not change.
Monday, September 28, 2009 at 8:03pm by Brandon

Physics
A research balloon of total mass 225 kg is descending vertically with a downward acceleration of 1.4 m/s2. How much ballast must be thrown from the car to give the balloon an upward acceleration equal to 3.6 m/s2, presuming that the upward lift of the balloon does not change.
Thursday, October 24, 2013 at 9:55pm by Liz

Physics
If a balloon is filled with helium gas of molar mass 4x10^-3, at a pressure of 1*10^5, What is the number of moles of gas in the balloon?
Wednesday, October 27, 2010 at 9:35am by George

Science HELP!
If a balloon is filled with helium gas of molar mass 4x10^-3, at a pressure of 1*10^5, What is the number of moles of gas in the balloon?
Wednesday, October 27, 2010 at 11:01am by George

Chemistry
a helium balloon is partially filled with 28.7 L of gas at 25.0 degress celcius and a pressure of 1 atm. if the balloon is released and it floats up intp the atmosphere to a heightwhere the pressure is 2.8 x 10^-3 atm and the temperature is -24.0 degrees celcius, calculate the...
Thursday, December 8, 2011 at 7:08pm by Dani

Physics
A research balloon of total mass 200 kg is descending vertically with a downward acceleration of 3.2 m/s^2. How much ballast must be thrown from the car to give the balloon an upward acceleration equal to 2.8 m/s^2, presuming that the upward lift of the balloon does not change...
Wednesday, November 28, 2007 at 3:21pm by Lindsay

AP Chemistry
A 2.50 L balloon is filled with helium gas at sea level, 1.00 atm and 32 degrees celsius. The balloon is released and it rises to an altitude of 30,000 ft. If the pressure at this altitude is 228 mm Hg and the temperature is -44 degrees celsius, what is the volume of the balloon?
Thursday, November 1, 2012 at 8:10pm by Katie

physics
The largest ballon ever flown had a volume of 53 million cubic feet. The thickness of the fabric is only 0.013mm. The balloon would reach an altitude of 150,000 ft. ( 46 km). The atmospheric pressure at that altitude is about 2*10^-3kg/m^3. The pressure of the helium was the ...
Wednesday, January 1, 2014 at 2:41pm by alice

Chemistry
A balloon is filled with 0.75 L of helium gas at 1 atm pressure and 25 degrees Celsius. The balloon is released and floats upward in the atmosphere. The temperature drops to 23 degrees Celsius and the balloon expands to 1.50 L. What is the pressure at this altitude? Assume the...
Sunday, April 25, 2010 at 8:13pm by Zecnoe

physical science
Check for probable typo: "a lever is used to lift a heavy load. when a 50-n force pushes one end of the lever down 1.2m the load rises 0.2m. show the weight of the load is 300n " Work done by 50 N force = 50*1.2 =60 N-m Work done by load = W*0.2 Equate work done 0.2W = 60 W = ...
Wednesday, August 17, 2011 at 12:59pm by MathMate

physical science
A lever is used to lift a heavy load. When a 50 N force pushes one end of the lever down 1.2m the load rises .2m. Show the weight of the load is 300N ADVANTAGE of lever is input/output = 1.2/.2 = 6 W=FD W=50N*6 (b/c of advantage) = 300N
Wednesday, August 17, 2011 at 12:59pm by Amanda

physical science
A lever is used to lift a heavy load. When a 50 N force pushes one end of the lever down 1.2m the load rises .2m. Show the weight of the load is 300N ADVANTAGE of lever is input/output = 1.2/.2 = 6 W=FD W=50N*6 (b/c of advantage) = 300N
Wednesday, August 17, 2011 at 12:59pm by Amanda

Chemistry
Bill and Bob have been testing a new aluminised PET (Polyethylene Terephthalate) film and they now use the material to make helium filled balloons. Bill’s balloon is less inflated than Bob’s, and the latter jokes about it. However, Bill insists he has to be careful because if ...
Wednesday, February 8, 2012 at 5:17am by MM

Chemistry
Bill and Bob have been testing a new aluminised PET (Polyethylene Terephthalate) film and they now use the material to make helium filled balloons. Bill’s balloon is less inflated than Bob’s, and the latter jokes about it. However, Bill insists he has to be careful because if ...
Wednesday, February 8, 2012 at 5:21am by MM

Chemistry
A sealed balloon is filled with 1.20 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 250. torr and the temperature is -27°C. What is the change in volume of the balloon as it ascends from 1.00 atm to a pressure of 250. torr?
Monday, November 21, 2011 at 9:17pm by Alice

Physics
A 600-kg weather ballon is designed to lift a 4000-kg package. What volume should the ballon have after being inflated with helium at standard temperature and pressure so the total load can be lifted up? The problem asks for volume. Take it a step further... assume the ballon ...
Wednesday, November 10, 2010 at 11:54pm by Daniel

Physics
A 600-kg weather ballon is designed to lift a 4000-kg package. What volume should the ballon have after being inflated with helium at standard temperature and pressure so the total load can be lifted up? The problem asks for volume. Take it a step further... assume the ballon...
Thursday, November 11, 2010 at 9:48am by Daniel

Physics
The system has two wheels and requires an effort of 12N to lift a load of 4kg at constant speed. Find M.A nd V.R.. Calculate work done by effort to raise load of 2m and efficiency of this machine.
Sunday, March 10, 2013 at 8:22am by Mutale

physics
Help, the last equation given to me on previous question was incorrect and I took a 0 % on my assignment !!! A mountain-climber friend with a mass of 82 kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs...
Tuesday, April 3, 2012 at 7:49am by christy

chemistry
a 3.0L helium balloon is placed in a car sitting in hot sunlight. The temperature in the mall, when the balloon was bought, was 22C. The temperature in the car is 45C. what will be the new volume of the of the balloon. Will it be: 6.14L? I would think this looks right but the ...
Saturday, March 22, 2008 at 7:28pm by Jonathan T

Physic
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.4 L in the warm store at 74 F. When he takes it outside, where the temperature is 55 F, he finds it has shrunk. By how much has the volume decreased?
Saturday, May 7, 2011 at 12:23am by Anonymous

Physic
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.4 L in the warm store at 74 F. When he takes it outside, where the temperature is 55 F, he finds it has shrunk. By how much has the volume decreased?
Saturday, May 7, 2011 at 11:24pm by Anonymous

Science
You are quite right. Some of the water in the breath of whoever blew up the balloon may condense on the inner wall of the balloon and reduce the pressure even more than predicted by the ideal gasd law. If the ballon were helium-filled, moisture would not ne a factor. It it the...
Monday, January 26, 2009 at 10:09pm by drwls

chemistry
a weather balloon partially filled w/ 33.5 L of helium @ 18 deg C & .95 atm. what volume will helium occupy @ -23 deg C w/ a pressure of 3 x 10 to the -3 atm?
Tuesday, January 29, 2013 at 1:32pm by Annie

chemistry
a balloonist is preparing a trip in a helium balloon. the trip begins in early morning at a temp of 15 degrees Celcius. By mid afternoon, the temp has increased to 30 degrees C. assuming the pressure remains constant at 1.00 atm, for each mole of helium, calculate: 1. the ...
Sunday, March 20, 2011 at 11:34am by Joan

Chemistry
A balloon filled with helium has a volume of 1.oo x 10^3 L at 20 degrees c. What will be the balloons volume at 30 degrees c, if the pressure surrounding the balloon remains constant?
Thursday, September 23, 2010 at 11:26am by Lisa

physics 2B
physics 2B---- A toy balloon is filled with helium gas ( He}) at 1atm} and 30 degrees Celcius. If the volume of the balloon is 0.025 m^3, how many atoms does it contain?
Saturday, December 10, 2011 at 8:14pm by Celi

Chem
A balloonist is preparing to make a trip in a helium-filled balloon. The trip begins in early morning at a temperature of 15 degrees C. By midafternoon, the temperature has increased to 30. degrees C. Assuming the pressure remains constant at 1.00atm, for each mole of helium, ...
Monday, March 17, 2014 at 8:28pm by Amber

physics
A portable steel tank with a volume 35 liters (0.035m³) holds helium gas used for filling party balloons. The pressure in the tank is 120atm when at room temperature of 22 °C. How many moles of helium gas are in the tank? Each balloon has a volume of 2.5liters when filled with...
Wednesday, January 4, 2012 at 12:14am by sand

Biomechanics
An 88.9 kg weight lifter is required to perform a snatch movement for their final lift in a weight lifting competition. The standard weight lifting bar is 20 kg and the load attached to the bar was in the form of 6 x 20 kg weight discs, 2 x 10 kg weight discs, 2 x 5 kg weight ...
Monday, May 7, 2012 at 2:06am by Chleo

physical science
Taking a helium filled balloon from a warm house to a cold temperature outside will decrease the pressure inside the balloon and it will appear to be losing its gas. This will not be a phase change for it was a gas inside the house and it still is a gas outside on a snowy day...
Wednesday, February 13, 2008 at 6:40pm by DrBob222

chem!
i cant figure this one out! :( a balloonist is preparing a trip in a helium balloon. the trip begins in early morning at a temp of 15 degrees Celcius. By mid afternoon, the temp has increased to 30 degrees C. assuming the pressure remains constant at 1.00 atm, for each mole of...
Monday, March 21, 2011 at 10:15am by Joan

chemistry
A high-altitude balloon contains 97.5 L of helium gas at 95.8 kPa. What is the volume when the balloon rises to an altitude where the pressure is only 21.5 kPa? (Assume that the temperature remains constant.)
Wednesday, March 2, 2011 at 5:12pm by lisa

chemistry
A helium-filled balloon has a volume of 2.83 L at 30 ◦ C. The volume of the balloon decreases to 2.35 L after it is placed outside on a cold day. What is the outside temperature in K? Answer in units of K?
Monday, March 26, 2012 at 9:48pm by Kellie

Science- physics
A balloon weighing 80 kg has a capacity of 1200 m3. If it is filled with helium, how great a payload can it support? The density of helium is 0.18 kg/m3 and the density of air is 1.30 kg/m3. Express your answer in Newtons. I know the answer is 12, 400 Newtons I just don't know...
Sunday, October 23, 2011 at 5:04pm by Hannah

PHYSICS
The buoyant force acting on the balloon is (p1V1 - p2V2)g where V1 = V2 = 318 m3 p1 is the density of air p2 is the density of helium c) The net force is the buoyant force - m*g, where m is the mass of the balloon. If the net force is positive, the balloon will rise d BF - m*g...
Thursday, November 8, 2012 at 10:34am by Jennifer

physics
A system of pulleys is used to lift an elevator carrying a 3,300 newton load. assuming the pulley system is friction free, approximately how far would 10,000 joules of energy lift the elevator?
Tuesday, February 22, 2011 at 9:54pm by tania

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

chem
A balloon holds 29.3 kg of helium. What is the volume of the balloon if the final pressure is 1.2 atm and the temperature is 22°C? using the equation pv=nrt would i put 29.3 kg in place of n? but n has to be in moles so how do you convert that? thanks
Monday, February 14, 2011 at 7:35pm by hannah

physics
The balloon contains 0.30 mol of helium starts at a pressure of 125 kpa and rises to an altitude where the pressure is 55.0 kpa, maintaining a constant 300 {\rm K} temperature. A)By what factor does its volume increase? B)How much work does the gas in the balloon do?
Friday, April 20, 2012 at 9:16pm by I

ap chemistry
A 1.50 liter tank filled with helium at 125 atm is used to fill balloons. The pressure in each balloon is 950 torr and the volume of each balloon is 1.20 liters. How many balloons can be filled? Answer in units of balloons
Saturday, February 9, 2013 at 7:16pm by cheri

Chem
Hello! A 22.0 L cylinder containing helium gas at a pressure of 28.1 atm is used to fill a weather balloon in order to lift equipment into the stratosphere. What is the final pressure (in atm) in the cylinder after a 101 L balloon is filled to a pressure of 1.23 atm. I found ...
Friday, October 12, 2012 at 7:16pm by Anonymous

Chemistry
A helium ballon contains 0.32g of helium. Given the molecular weight of helium is 4. How many moles of helium does it contain.
Monday, March 31, 2014 at 2:29pm by Anonymous

chemistry
A weather balloon if it starts with 10 liters of helium at 0km elevation and a temperature of 20 degrees. it is released and rises up through the atmosphere to an elevation of 12km where the temperature is -60degrees. calculate the volume of the helium at 12km.
Sunday, June 3, 2012 at 9:26pm by Cynthia

chem (boyles and charles law)
A helium filled balloon has a volume of 2.75L at 20 celsius .The volume of the balloon decreases to 2.46L after it is placed outside on a cold day.What is the outside temperature in celsius?
Sunday, April 28, 2013 at 1:14pm by nene

Physics
After rubbing a balloon against someone's hair, a balloon has accumulated a static electric charge. The air inside the balloon has the same density as the air outside of the balloon, and the balloon itself weighs 1.41mN. How many free electrons are there on the surface of the ...
Monday, January 30, 2012 at 9:18pm by Anonymous

science
You are a maker of hot air balloons and wish to construct a balloon that will lift you and a friend to places unknown. Your standard balloon design is a perfectly spherical, nylon fabric balloon with a small hole on the bottom for the burner that heats the air. Nylon starts to...
Thursday, April 11, 2013 at 12:10pm by Sahil

physics
Some say that the hot air balloons with which the Montgolfier brothers performed their first flight had a volume of 1700 cubic metres and could lift 780 kilograms (that includes the balloon, basket and payload). Assume that the balloon took off on a day when the sea level ...
Thursday, March 27, 2014 at 12:00am by Nick

Physics :(( help please TT
You are a maker of hot air balloons and wish to construct a balloon that will lift you and a friend to places unknown. Your standard balloon design is a perfectly spherical, nylon fabric balloon with a small hole on the bottom for the burner that heats the air. Nylon starts to...
Friday, April 12, 2013 at 7:41pm by Ian

Physics
A construction crew pulls up an 87.5 kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.5 m and it arrives with a speed of 15.6 m.s having started from rest. Assume that acceleration was not constant. How much work was done by the ...
Friday, June 3, 2011 at 3:14pm by Casey

Chemistry
Fill a balloon with helium gas to a volume of 2.68 L at 23 celsius and 789mmHg. What would the volume of helium if the pressure changes to 632 mmHg but the temperature is unchanged. This is how I solved it V2 = V1 X P1/P2 2.68L X 23/789 = V2 =.078 L Is this correct
Sunday, October 21, 2007 at 7:07pm by lt

physics
The GoodYear blimp is kept aloft by helium gas which fills a volume of 4559m^3. It can carry a maximum load of 1176kg. How much more mass could the blimp carry if it were filled with hydrogen? Take the density of helium gas to be 0.160kg/m^3 and that of hydrogen to be 0.081kg/m^3
Wednesday, April 10, 2013 at 11:08am by Anna

physics
Suppose that, on a day when the outside temperature is 15 degrees Celsius, we fill a balloon with pure nitrogen gas, of which the molar mass is 28 grams per mole. Now suppose that we want to heat up a second (equally large) balloon containing air, such that it generates the ...
Thursday, March 27, 2014 at 12:02am by Nick

Chemistry
Fill a balloon with helium gas to a volume of 2.68 L at 23 celsius and 789mmHg. What would the volume of helium if the pressure changes to 632 mmHg but the temperature is unchanged. This is how I solved it V2 = V1 X P1/P2 2.68L X 789/632 = ANSWER V2 =.3.35 L Is this correct
Tuesday, October 23, 2007 at 12:06am by LT

chemistry
A balloon filled with helium has a volume of 30.0 L at a pressure of 100 kPa and a temperature of 15 degrees C. What will the volume of the balloon be if the temperature is increased to 80 degrees C and the pressure remains constant?
Monday, August 4, 2008 at 3:50pm by Dan

Chemistry
A balloon filled with helium has a volume of 30.0 L at a pressure of 100 kPa and a temperature of 15.0 Celsius. What will the volume of the balloon be if the temperature increased to 80.0 Celsius and the pressure remains constant?
Sunday, May 6, 2012 at 10:30pm by Lisa

Physics
Use Archimedes' Principle. Volume*(Air density) = Payload + (Volume)*(Helium density) Solve for Volume. You will need to assume a temperature and pressure. I suggest 15 C and 1 atmosphere. At sea level and at 15°C , the density of air is 1.275 kg/m^3. Helium would be 4/29 of ...
Wednesday, July 25, 2012 at 10:15pm by drwls

physics
calc the buoyant force on a 2 L helium balloon
Thursday, December 6, 2012 at 5:00pm by chris

Physics
There is no ramp involved... its just a cart on a flat table, and then a puly, and a load. Would gravity be pulling the load down, which would make the cart move? I still don't get how I would calculate the 'drag' (friction and air resistance) force. Here's my attempt at ...
Saturday, October 6, 2007 at 8:03am by Jenny

MONGU COLLEGE
During an experiment conducted on the effort E to lift a load W when using a simple the following values were recorded. ……………………………………………………………………………………………… |Effort E| 20 | 24.8|30 | 35 | 45 | …………………………………………………………………………………………… |Load W |100 | 200 |300 | 400| 600...
Thursday, February 28, 2013 at 6:13pm by barotseland network

MONGU COLLEGE
During an experiment conducted on the effort E to lift a load W when using a simple the following values were recorded. ……………………………………………………………………………………………… |Effort E| 20 | 24.8|30 | 35 | 45 | …………………………………………………………………………………………… |Load W |100 | 200 |300 | 400| 600...
Thursday, February 28, 2013 at 6:13pm by barotseland network

chemistry
a balloon is filled with 500 mL of helium at a temperature of 27 degrees celsius and 755 mmHg as the balloon rises in the atmosphere the pressure and temperature drop what volume will it have when it reaches an altitude where the temperature is -33 degrees celcius and the ...
Tuesday, May 8, 2012 at 8:01pm by candi

chemistry
a balloon is filled with 500 mL of helium at a temperature of 27 degrees celsius and 755 mmHg as the balloon rises in the atmosphere the pressure and temperature drop what volume will it have when it reaches an altitude where the temperature is -33 degrees celcius and the ...
Tuesday, May 8, 2012 at 8:04pm by candi

Physics
Figure 18-46 shows a hydraulic lift operated by pumping fluid into the hydraulic system. The large cylinder is 40 cm in diameter, while the small tube leaving the pump is 1.7 cm in diameter. A total load of 2500 kg is raised 2.2 m at a constant rate. Neglect pressure ...
Wednesday, December 5, 2012 at 8:26am by Drake

Physical science
On a perfect day, you are hovering at low altitude in a hot-air balloon, accelerated neither upward or downward. The total wieght of the balloon, including its load and the hot air in it is 20,000N. Show that the volume of the displaced air is 1700 m3 (Hint:Buoyancy in a Gas)
Sunday, February 24, 2008 at 5:57pm by Rachel

HELP!
can I make a balloon stay on air without using helium?
Sunday, January 6, 2008 at 7:19pm by Yasmeen

science
Why does a helium-filled balloon float up when it is released?
Tuesday, November 10, 2009 at 5:51pm by Katherine

Physics
So volume of balloon 4/3*pi*r^3 *density of helium * g - ( 3.5 *9.81) ?
Thursday, December 3, 2009 at 6:38pm by Tommy

physics
The balloon contains 0.30 {\rm mol} of helium starts at a pressure of 115 {\rm kPa} and rises to an altitude where the pressure is 55.0 {\rm kPa}, maintaining a constant 300 {\rm K} temperature. (A)By what factor does its volume increase? (B)How much work does the gas in the ...
Sunday, April 22, 2012 at 5:40am by George

calculus
A hot air balloon rising vertically is tracked by an observer located 4 miles from the lift-off point. At a certain moment, the angle between the observer's line-of-sight and the horizontal is \frac{\pi}{3} , and it is changing at a rate of 0.1 rad/min. How fast is the balloon...
Friday, March 7, 2014 at 7:00pm by MEMO

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