Find Force to Hold Hydrogen Balloon - Homework Help

  • Thread starter Thread starter rachelina
  • Start date Start date
  • Tags Tags
    Density Force
AI Thread Summary
To find the force necessary to hold a hydrogen-filled balloon down, one must understand buoyancy and apparent weight. The total weight of the balloon, including its mass and the weight of the hydrogen, must be calculated. The weight of the air displaced by the balloon is determined using the density of air and the balloon's volume. The difference between the weight of the displaced air and the total weight of the balloon gives the buoyant force, which is the force needed to keep the balloon grounded. This approach effectively utilizes the principles of buoyancy to solve the problem.
rachelina
Messages
1
Reaction score
0

Homework Statement



The density of air is 1.29 kg per cubic meter.
The density of helium is 0.18 kg per cubic meter.
The density of hydrogen is 0.06 kg per cubic meter.
When inflated, a balloon has a volume of gas of 2.0 X 10^6 cubic meters.
When empty, the balloon has a mass of 200,000 kg.

HOW DO I FIND THE FORCE NECESSARY TO HOLD THE BALLOON DOWN IF IT WERE FILLED WITH HYDROGEN?

I have no idea what the equation would be. HELP!


The Attempt at a Solution



Uhhhh...
 
Physics news on Phys.org
Does one understand the concept of buoyancy, and effect of apparent weight or the impact of differential weight.

W = m g = \rhoV g. The difference in weights would give the buoyant force and that is the force that would have to be provided by the tie down.
 
Find the total weight of the floating balloon. Find the weight of the displaced air. Difference of these weights will be the force necessary to hold the balloon down.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

How to Calculate the Height a Helium Balloon Ascends Using Mass and Density
Replies
12
Views
2K
Find the Upward Force of a Boat with 6 People Aboard
Replies
11
Views
2K
Can a Helium-Filled Weather Balloon Accelerate Upwards Faster Than Gravity?
Replies
2
Views
1K
How Does Density Affect the Lifting Power of Helium Balloons?
Replies
4
Views
2K
Calculate how high balloon rises before stopping
Replies
8
Views
12K
How Do You Calculate the Buoyant Force of a Helium Balloon?
Replies
1
Views
9K
Calculating Air Density and Temperature in a Hot Air Balloon
Replies
6
Views
8K
Finding tension given densities?
Replies
1
Views
2K
Moles of gas helium balloon; buoyancy; PV=nRT
Replies
3
Views
8K
Buoyant Force and Archimede's principle
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top