Balloon Definition and 484 Threads

[SOLVED] Spherical Balloon - Related Rates Problem Homework Statement A spherical balloon is inflated so that its radius increases at a rate of 1 cm/min. How fast is the volume increasing when: a) the diameter is 2000 cm b) the surface area is 324 pi cm^2 ---> I have solved this already...

Homework Statement A light baloon filled wiht helium and with a density of 0.180kg/m^3 is tied to a light string of length L= 3.00m. The string is tied to the ground, forming an "inverted" simple pendulum. The balloon is displaced slightly from it's equillibrium position, as shown in picture...

I cannot find this in my book and i cannot wrap my brain around it...i am more of an analytical person... The question is-A negatively charged balloon is sticking to the wall. Does this mean that the wall is positively charged?Explain.Eventually, the balloon falls down. Explain why. The...

Ive been stressing on this problem for a while ill show you the work below A hot-air balloon is rising upward with a constant speed of 2.60 m/s. When the balloon is 3.20 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before...

Homework Statement A light spring of constant k= 90.0N/m is attatched to a table vertically. A 2.00g balloon is filled with helium (d= 0.180kg/m^3) to a volume of 5.00m^3 and is then connected to the spring, causing the spring to stretch as shown. Determine the distance L when the balloon is...

Q- A balloon is rising at 10m/s when its passenger throws a ball straight up at 12m/s .How much later does the passenger catch the ball? How would I approach this problem ? I am terrible at physics when it comes to doing the first basic step on a problem. If anyone can point me in the right...

Help with a problem: A spherical, hydrogen-filled balloon has a radius of 12 m. The mass of the balloon plastic and support cables is 196 kg. What is the mass of the maximum load the balloon can carry? (Density of hydrogen = 0.09 kg/m^3; density of air = 1.25 kg/m^3) I do not know...

[SOLVED] Balloon losing electrons Homework Statement You have a neutral balloon. The charge of an electron is -1.6x10^-19C. What is its charge after 19000 electrons have been removed from it? Answer in units of microcoulombs. Homework Equations I THINK Q = Ne The Attempt at a...

I was wondering, In a star shaped balloon, isn't the pressure inside the same in the center as it is in the smaller edges? But let's say I also add some more air. As the air is being pumped in, wouldn't the pressure momentarily be higher in the points. If so, wouldn't their temperature be...

Homework Statement An empty rubber balloon has a mass of .0120 kg. The balloon is filled with helium at a density of .181 kg/m^3. At this density the balloon is spherical with a radius of .500m. If the filled balloon is fastened to a vertical line, what is the tension in the line...

Homework Statement I have a balloon with helium in it, I need to know the acceleration that it rises. It would be great if you could tell me what I need if I am missing any. This is what I have, Density of liquid(air) = 1 g/l Density of Helium = .1786 l/g Volume of Balloon = 91 cubic...

From Classical Mechanics by Taylor: "The Compton generator is a beautiful demonstration of the Coriolis force due to the Earth's rotation,... A narrow glass tube in the shape of a torus or ring (radius R of the ring >> radius of the tube) is filled with water, plus some dust particles to let...

[SOLVED] Gas Law Problem Homework Statement An expandable balloon contains 1400L of He at 0.950 atm pressure and 18 deg C. At an altitude of 22 miles (temp 2 deg C, and pressure 4 Torr. What will be the volume of the balloon? Homework Equations (P1V1)/T1 = (P2V2)/T2 1 atm = 760 Torr...

Homework Statement (a) How many atoms of helium gas fill a balloon of diameter 29.4 cm at 23.5°C and 1.00 atm? (b) What is the average kinetic energy of the helium atoms? (c) What is the root-mean-square speed of the helium atoms? Homework Equations P=2/3[N/V][1/2mv^2]...

Homework Statement Under standard conditions, the density of air is 1.293 kg/m3 and that of helium is 0.178 kg/m3. A spherical helium balloon lifts a basket plus cargo of mass 269.0 kg. What must be the minimum diameter of the spherical balloon? Homework Equations p = F/A The...

Homework Statement A hot air balloon rises from the ground with a velocity of (2.0m/s)y. A champagne bottle is opened to celebrate takeoff, expelling the cork horizontally with a velocity of (5.0m/s)x. When opened, the bottle is 6 m above the ground. a) What is the initial velocity of the...

Homework Statement A balloon with an attached basket and a total mass of 1200 kg is hovering at an altitude of 500m. A bag containing 100kg of sand is emptied over the side of the basket. Find the upward acceleration of the balloon after the sand has been poured out. Homework Equations...

Homework Statement A Hot air balloon is traveling vertically up- ward at a constant speed of 2.6 m/s. When it is 19 m above the ground, a package is released from the balloon. The acceleration of gravity is 9.8 m/s^2. After it is released, for how long is the package in the air? Answer...

ambient air with 15 degree C and atm pressure of 1.013E5 N/m^2. Balloon is filled with ambient air before it was lifted up to 500 m by a helicopter where the pressure is 950 hPa, what will the balloon's internal temperature and its internal mass density? I try to use PV = MRT and I found...

I have 2 problems that i can't do You apply a force of 0.35N up to lift a fork. The resulting acceleration is 0.15m/s2 up. Determine the mass of the fork (the answer is 35g-why?) A hot air balloon has acceleration of 1.10m/s2 down. The mass is 315kg. What is the upward force on the...

Homework Statement A hot-air balloon is descending at a rate of 2.0 m/s when a passenger drops a camera. If a camera is 45m above the ground when it is dropped, (a) how long does it take for the camera to reach the ground(b) what is the velocity just before it lands? Let upward be the...

Helium Balloon Question! Hey I have a buoyancy question here, anyone know how to solve it? A 15 gram rubber balloon is filled with 18 L of Helium (density 0.179kg/m^3) and tied with a string to a child's wrist. Find the tension in the cord. The answer is 0.050N but what is the solution? Im not...

As a helium balloon increases in altitude, the density of the air inside decreases. However, the density of the air surrounding it (The atmosphere) also decreases with altitude p=p0*exp(-z/z0), where z0 is the scale height of the atmosphere. So does this mean the lift force acting on the...

Homework Statement A helium balloon has volume V0 and temperature T0 at sea level where the pressure is P0 and the air density is \rho_0. The balloon is allowed to float up in the air to altitude y where the temperature is T. (a) Show that the volume occupied by the balloon is then V =...

Can somebody give me a link to a place where they explain crumple zones and know how to simulate that with poster board and balloons? And how would i figure out the perfect amount of air to put into a balloon to withstand as much compression as possible?

Homework Statement A balloon is flying directly upward with a constant velocity of 6.0 m/s. When it reaches 145 m above the ground, a package is thrown horizontally at 4.5 m/s with respect to the balloon. How many seconds after being launched will the package hit the ground? Homework...

Homework Statement balloons are required to lift 20 metric tons. the pressure of helium is 101.325kpa. temp=21.1degcelsius. what should be the diameter of the balloon if it was spherical in shape in order to lift the weight? Homework Equations bouyant force?? The Attempt at...

Hi All, I'm building a balloon car and I'm in need of ways to increase the speed of the car. Here's a description: Attach a balloon to a car. Rave the balloon powered car over 3 meters. The car must move on its wheels and the sole source of propulsion must be provided by the balloon...

Homework Statement Well, I think I could figure this out, but I have limited time, and apparently it isn't meant to be in THAT much detail. I'm attempting to assess how the volume of a balloon will vary with mass of gas added to it. It doesn't have to be exact. Homework Equations I'm...

Homework Statement An empty rubber balloon has a mass of .0111 kg. The balloon is filled with helium at 0degrees C, 1atm pressure, and a density of .179 kg/m^3. The filled balloon has a radius of .154 m. What is the magnitude of the buoyant force acting on the balloon? Answer in units of N...

Homework Statement A balloon 20 m in diameter is filled with helium at a gauge pressure of 2.0 atm. A man is standing in a basket suspended from the bottom of the balloon. A restraining cable attached to the basket keeps the balloon from rising. The balloon (not including the gas it...

I can't figure out how to get started on this problem. Maybe you guys can help. A spherical balloon carries a total cahrge Q(1C) uniformly distributed over the surface. At t=0, r=r(sub 0), at t=30s, r=2r(sub 0). Find what is the electron field at 90 s at a distance of .5m from the balloon...

Homework Statement Take 2 rubber balloons A and B of equal mass. Balloon A is filled with air and balloon B is left empty and the two are weighed in a pan balance. What will you observe and why? 2. The attempt at a solution The balloon with air will appear lighter if experiment is...

Homework Statement A balloon is rising vertically at a constant speed of 21 m/s. A stone is dropped from the balloon. The stone strikes the ground 10 seconds later. Assuming that air resistance is negligible and that acceleration on Earth due to gravity is 9.8 m/s2, from what height is the...

Ideal Gas Law Problem :) Homework Statement A balloon is filled with helium at a pressure of 1.0 x 10^5 Pa. The balloon is at a temperature of 23°C and has a radius of 0.13 m. (a) How many helium atoms are contained in the balloon? (b) Suppose we increase the number of helium atoms in...

Homework Statement A balloon is filled with helium at an atomospheric pressure. The skin of the balloon has a mass of 3.1 kg and the volume of the balloon is 18 m^3. Homework Equations What is the greatest weight of the balloon? The Attempt at a Solution In order to determine the...

Homework Statement A helium-filled balloon at atmospheric pressure is tied to a 3.1 m long, 0.100 kg string. The balloon is spherical with a radius of 0.40 m. When released, it lifts a length (h) of the string and then remains in equilibrium as in Figure P9.78. Determine the value of h. When...

This is one of many postings from me this week unfortunately I'm just not getting the correct answers...anyway here I go : A toy balloon is inflated with helium at a constant pressure that is 4.2e5 Pa in excess of atmospheric pressure. If the balloon inflates from a volume of 1.4e-4m3 to...

A spherical helium balloon is 2.5 m in diameter and has a total mass of 6.7 kg. When released into the U. S. Standard Atmosphere, at what altitude will it settle? My first thought was that diagram has the weight of the balloon acting downward, buoyant force upwards. -weight + Fb = 0...

buoyant forces I was having trouble with this problem. please let me know how to approach this. thanks. An empty rubber balloon has a mass of 0.0135 kg. The balloon is filled with helium at a density of 0.181 kg/m3. At this density the balloon is spherical with a radius of 0.400 m. If the...

Helium Balloon Question...Help! A 600 kg weather balloon is designed to lift a 4000 kg package. What volume should the balloon have after being inflated with helium at standard temperature and pressure in order that the total load can be lifted? density of helium .179 and air is 1.29. I have...

I got stuck on the following problem, which is very important for my exam preparations - would anyone mind giving me a hint? A balloon of Volume V(0) is tethered to the ground using a light cable. It is filled with helium gas of density rho (He). At ground level the pressure and density in...

And some film technicians running around with cameras and sound booms. The streets surrounding were I am are blocked off. It's past midnight; these hollywood people are mentally ill. But we already knew that. :rolleyes:

Sorry I am poor at using English to describe things. I hope you will patiently read my questions and answer them. 1. I saw some helium balloons today. We all know that if you do not hold the helium balloons, they will rise up to the sky. But today I saw a bundle of helium balloons (their...

Here are a couple problems I would like to check and a couple I'm not sure how to do: 1.3)A 650kg weather balloon is designed to lift a 4600kg package. What volume should the balloon have after being inflated with helium at 0C and 1 atm pressure to lift the total load? Density of helium =...

Hi. I have been trying to do this question for about an hour now... A 0.12 kg balloon is filled with helium (density-0.179). If the balloon is a sphere with a radius of 5.2m what is the maximum weight it can lift. I tried using the P=M/V then Fb=pgV...No luck...Help..

I have tried to solve these problems all day, but to no avail. I am very confused! 8. The instruments attached to a weather balloon have a mass of 5.0 kg. The balloon is released and exerts an upward force of 95N on the instruments. A. What is the acceleration of the balloon and...

A hot air balloon is ascending straight up at a constant speed of 7.0 m/s. When the balloon is 12.0m above the ground, a gun fires a pellet straight up from the ground level with an initial speed of 30.0 m/s. Along the paths of the balloon and the pellet, there are two places where each of them...

Our teacher just gave us a priject to complete and i cannot figure it out. first of all we have limited supplies. we can use 5 ballons, 6 straws, 10 paperclips, 5 rubberbands, a whole roll of masking tape, scissors and a guide wire that cannot be altered. Our goal is to get the a balloon to go...

Rocket balloon with gravitaion? Our teacher just gave us a priject to complete and i cannot figure it out. first of all we have limited supplies. we can use 5 ballons, 6 straws, 10 paperclips, 5 rubberbands, a whole roll of masking tape, scissors and a guide wire that cannot be altered. Our...