- #1
physicsperson
- 20
- 1
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 sure if yuo need it but the denisty of air is 1.29kg/m^3. Thanks.
Equations i used include F buoyancy = F tension + m helium * gravity + m balloon * gravity
and F buoyancy = density * gravity * volume displaced
I tried to solve but got completely different answers, what is the volume displaced? is that the right thing to use?
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 sure if yuo need it but the denisty of air is 1.29kg/m^3. Thanks.
Homework Equations
Equations i used include F buoyancy = F tension + m helium * gravity + m balloon * gravity
and F buoyancy = density * gravity * volume displaced
The Attempt at a Solution
I tried to solve but got completely different answers, what is the volume displaced? is that the right thing to use?