Balloon Definition and 484 Threads

Homework Statement In the figure: A balloon is attached to a ladder. The ladder stands vertical on the ground. The height of the ladder is 6m and there's a monkey at the base of the ladder Q) The mass of the balloon is 50kg and mass of the monkey is 25kg. The monkey starts to climb...

Hello, I was shown these forums by a friend who studies Astrophysics and he suggested me that I could present my little science project here. I hope that this area is OK for that, because I assume that my project is not as advanced (i.e. that it already delivered results), that it could go...

The thread title is meant to be "Can a fly lift a balloon", it's Tom now due to a small mistake while posting. This question was raised on a dutch technology forum. Specific: Can a fly in a balloon lift the balloon by flying upwards against the top of the balloon? More general: Can a flying...

The following came from a discussion about launching a balloon. Suppose you have a heavy coiled rope of total length, L, and constant linear density, MU. You take hold of one end of the rope and pull it vertically up with a force, F(t), so that the tip of the rope moves at a constant...

Homework Statement The mass of an unfilled balloon is 7.5g. How much helium has to be filled in the balloon to make it float in air? density of helium: 0.18kg/m^3 density of air: 1.29kg/m^3Homework Equations When I calculate the volume like this: (7.5*10^-3kg)/(0.18kg/m^3)=0.041m^3 and than I...

Homework Statement Could someone help me calculate the rate of expansion of gas (helium or hydrogen) in a balloon at different altitudes. temperature is -30f at all altitudes http://www.engineeringtoolbox.com/air-altitude-pressure-d_462.html <- chart for air pressure Homework...

Homework Statement A weather balloon is designed to expand to a maximum radius of 30 m when in flight at its working altitude where the air pressure is 0.033 atm and the temperature is 95 K. If the balloon is filled at atmospheric pres- sure and 462 K, what is its radius at lift-off...

The analogy always used is to draw two points on the surface of a balloon and then blow air in the balloon. The points move away as the balloon expands. The issue I have with this is: now draw a "meter stick" on the surface of the balloon. It expands too, at the same rate, so that the number...

If the LHC discovers energy evaporating to other branes, will the 'raisin pudding' analogy be abandoned in favor of the balloon analogy?

Homework Statement A light spring of constant k = 85.0 N/m rests vertically on a table (as shown in part a) of the figure below). A 2.25 g balloon is filled with helium (density = 0.180 kg/m3) to a volume of 5.95 m3 and is then connected to the spring, causing it to stretch as shown in part...

Thought experiment: a sealed container with water in it, along with a balloon. You are able to control the balloon with a string from the outside somehow, and this string however is still sealing perfectly. No leaks in the system. The balloon is taken down to the very bottom of the container...

Homework Statement When the air rush out of a balloon, it shoots out. What physics principle is responsible for this behavior? Homework Equations The Attempt at a Solution Is it due to Newton's 2 nd law or 3 rd law?? We can compare this to a rocket propulsion. We can explain...

1. A weather balloon travels upward for 6 km while the wind blows it 10 km north and 8 km east. Approximately what is its final displacement from its intial position? I am not sure how to look at this. I know they are vectors which makes this a bit complicated and I know I have to use...

leaking air?? Homework Statement Suppose we make a circular hole 3 millimeter in diameter in a balloon. Calculate the initial rate at which oxygen escapes through the hole (at 0° C), in number of oxygen atoms leaving the balloon per second. Homework Equations i used 1/4 nAv where n...

Homework Statement An Airplane is traveling at 225 m/s when it strikes a weather balloon (m=1.82 kg) which can be considered to..? be at the rest relative to the ground below. After the collision, the balloon is caught on the fuselage and is traveling with the airplane. The collision takes...

Homework Statement There is a balloon of mass Mb. A rope ladder of negligible mass is hung from it. A man of mass m stands on the rope ladder. A buoyant force F acts on the balloon, causing the man-balloon-ladder system to accelerate upwards. Now, the man climbs up the rope ladder towards...

Homework Statement Hot-air balloon of mass M is descending straight down with acceleration a. How much Mass must be discarded to make acceleration a the same magnitude, but directly up instead of directly down? Disregard wind resistance/lift. Homework Equations The only one my book...

1. A hot-air balloon is ascending at the rate of 11 m/s and is 53 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground? 2. v = u + at s = ut + 1/2 a t^2 v^2 = u^2 + 2as 3. s...

Homework Statement A rubber balloon has a charge q evenly distributed over its surface. It is put into a uniform electric field of 120 N/C. What is the charge inside the balloon? Homework Equations The Attempt at a Solution I thought that E inside would be 120 since before it is...

Would the balloon inflate , deflate or do nothing if I injected the balloon with nothing but vacuum? Is it even possible to inject vacuum into an unflated balloon?

Homework Statement Given hb (m) = 1 (Height of point B) theta = 30 (degrees - launch angle) k (N/m)= 60 (assume the graph is linear) m (g) = 250 (balloon mass) 1. If Xs (cm) = 150 (pull distance) a) Find the estimated Vb and the landing X (ideal case where Ein =Eout) b) The balloon land...

Air is escaping from a balloon at a rate of R(t) = 60/(1+t2) cubic feet per minute, where t is measured in minutes. How much air, in cubic feet, escapes during the first minute? dr/dt = 60/(1 + t2) if I plug the time in (1) for (t) I should get 60/2 or 30 This seems a tad bit too easy...

Homework Statement A meteorological baloon had a radius of 1 m when released from sea level and expanded to a radius of 3 m when it had risen to it's maximum altitude, where the temperature was -20.0C. What is the pressure inside the balloon at that altitude? Homework Equations PV = nRT...

Homework Statement a) a light balloon is filled with 400m^3 of helium at 0 degree C, the balloon can lift a payload of what mass? b) what if? the density of hydrogen is nearly 1/2 the density of helium. what load can the balloon lift if filled with hydrogen? answer A) 444Kg B) 480Kg I have...

Im doing Final exam review this is the first question please check! Thank you! Homework Statement 1. Water balloon drop. You and your physics major roommate devise a plan to drop water balloons on classmates entering your dorm. Just as they cross a mark that’s 3.0 m from the door, you’ll...

"Vacuum" Air Balloon I have bounced around various sites and forums but I wanted to get a feel from some of those that may actually know. I have a theory on how this could work but basically wanted to get some opinions. My theory is not new but has a few added components. A geodesic sphere...

Homework Statement You blow up an ordinary party balloon with air until it has a diameter of 5.5 inches. Your friend blows up another balloon with helium gas until it has a diameter of 11 inches. Air consists mostly of O2 and N2 molecules, while helium gas consists of He atoms. Assume the...

Homework Statement What is the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.30? Neglect the mass of the balloon fabric and the basket. Homework Equations g=9.81 m/s^s The Attempt at a Solution I thought it would...

Homework Statement So the question is what volume is required to make a lead spherical balloon float. It is filled with helium, the P=10^5 Pa, the Temp is 300K and the thickness of the lead balloon shell is .1mm Any ideas on sending me in a direction with this one?Homework Equations The...

Any help would be greatly appreciated. I'm doing physics through correspondents, so I have nobody to explain this kind of thing to me. Homework Statement The instruments attached to a weather balloon have a mass of 5.0kg. a) The balloon is released and exerts an upward force of 98 N on...

1.Hi, I need to create a scale drawing of a hot air balloon at which we are creating, it is odd because I don't know how big it's going to be and have no idea how to make a scale drawing, the balloon does not need a basket but will have mints attached to it (as passengers) to see if it can hold...

Homework Statement A balloon is being inflated to its full extent by heating the air inside it. In the final stages of this process, the volume of the balloon changes from 4.00 x 106 L to 4.50 x 106 L by the addition of 1.3 x 108 J of energy as heat. Assuming that the balloon expands...

Homework Statement Use the equivalence principle to explain the observation that a helium balloon leans forward in a forward-accelerating car. Homework Equations I don't think equations are needed. The Attempt at a Solution I'm completely confused on this question

Physics problem...! A hot air balloon is ascending straight up at a constant speed of 7.50 m/s. When the balloon is 15.0 m above the ground, a gun fires a pellet straight up from ground level with an initial speed of 38.0 m/s. Along the paths of the balloon and the pellet, there are two places...

Homework Statement A physics student in a hot air balloon ascends vertically at a constant speed. Consider the following four forces. that arise in this question. F1 = the weight of the hot air balloon F2 = the weight of the student F3 = the force of the student pulling on the earth F4...

Homework Statement A student at a window on the second floor of a dorm sees his physics professor coming along the walkway beside the building. He drops a water balloon from 18.0 m above the ground when the prof is 1.00 m from the point directly beneath the window. If the prof is 180 cm...

1. Homework Statement A hot-air balloon plus cargo has a mass of 1890kg and a volume of 11430m^3. The balloon is floating at a constant height of 6.25m above ground. What is the density of hot air in the balllon? 2. Homework Equations : The force of buoyancy is equal to...

Homework Statement A balloon is rising at 19 m/s when its passenger throws a ball straight up at 21 m/s. How much later does the passenger catch the ball?Homework Equations Don't know relevant equations. except v(t)=vot-0.5(9.8)t^2 but I don't think that works. The Attempt at a Solution I've...

Homework Statement Hello all, I am having trouble with the following homework question using trigonometric formulas and the Sine Law. Here is the problem: Jack spotted a hot air balloon from his house at angle of elevation 57 degrees. Jack's friend who lives 26 km from Jack's house spotted...

Right now I blow up latex balloons with hydrogen. I am using the 20KV from a TV anode. I don't seem to be able to just stick the bare wire end of this HV source to ionize the Hydrogen. Covering the outside of the balloon with tin foil and putting the 20KV on that did next to nothing. Any...

Ok, I'm sure all of you have heard about or even built high altitude balloons. They often travel to about 80,000 - 100,000 feet (about 30 km or so). I was reading about a lot of them lately and I noticed that all designs had a parachute so that when the balloon burst, the payload could safely...

[SOLVED] Adiabatic Hot-Air Balloon Rising Question Homework Statement A large research balloon containing 2.00 x 10^3 m^3 of helium gas at 1.00 atm and a temperature of 15.0 degrees Celsius rises rapidly from ground level to an altitude at which the atmospheric pressure is only 0.900 Atm...

Some physicists have told me that the universe is like the surface of a balloon. Does this mean that if it were possible to travel at an infinite speed, you'd come back to the same place if you traveled straight in one direction?

Homework Statement A flexible balloon contains 0.375 mol of hydrogen sulfide gas H2S. Initially the balloon of H2S has a volume of 6750 cm^3 and a temperature of 29.0 C. The H2S first expands isobarically until the volume doubles. Then it expands adiabatically until the temperature returns...

Homework Statement A flexible balloon contains 0.375 mol of hydrogen sulfide gas H2S. Initially the balloon of H2S has a volume of 6750 cm^3 and a temperature of 29.0 C. The H2S first expands isobarically until the volume doubles. Then it expands adiabatically until the temperature returns...

If I were to let go of a Helium balloon with a volume of 3 liter at a depth of 10 meters, how do i calculate te time it will take the balloon to reach an altitude of a 100 meters in the air? And what changes if its not helium but hydrogen for instance? hope anyone can help me with this

Homework Statement A rubber balloon is rubbed against a wall and then sticks to the wall. This is because 2. multiple choice a. the balloon and the wall exchange charges through contact b. electrons hop back and forth between the balloon and the wall c. the balloon induces an...

Hi, I'm trying to find a way to make a balloon pop by itself in somebody's hands without them seeing how it happened. What's the best way to do this? Thanks, -Cory

A prankster drops a water balloon from the top of a building on an unsuspecting person on the sidewalk below. If the balloon is traveling at 30.3m/s when it strikes a person's head ( 1.5m above ground). How tall is the building? Neglect air resistance. PE= KE mgh=.5*mv^2 h= v^2/2g...

Hi, I'm trying to achieve neutral buoyancy with a sounding balloon (a large latex balloon). Is there a certain weight/helium ratio that will make it afloat at 10km/20km etc (tyhe balloon bursting altitude is ~38km) One idea that I had was to attach another balloon, which is mostly empty...