How do you find the volume of an inflated balloon?

Answer 1

Well, honey, to find the volume of an inflated balloon, you measure the diameter with a ruler or tape measure. Then you use the formula for the volume of a sphere, V = 4/3 * π * r^3, where r is the radius (half of the diameter). Plug in the radius and calculate that volume, and you've got yourself the volume of that inflated balloon. Easy peasy lemon squeezy!

Answer 2

you use a string, or something of that nature, tie it around the balloon, then measure the length of the string, the circumference. Uses the circumference to find the area/volume.

Use area and volume of a circle.

Answer 3

• You could submerge the balloon in water and measure the overflow. This would give a close answer but the pressure of the water may mean the measured volume is less than the actual volume.
• You could get the diameter of the balloon if it is spherical and calculate the volume of a sphere (V =4πr3/3).
• You can't use a gas law calculation as you do not know the number of moles of gas in the balloon. But air is a mixture of gases ~20% oxygen and 79% nitrogen. You could calculate approximately the number of moles from the weight of air in the balloon using the following formula. (Mass of filled balloon - mass of empty balloon) x 0.21/32 +(Mass of filled balloon - mass of empty balloon) x 0.79/28 ≈number of moles.

PV = nRT

Where

P = pressure (kPa)

V = volume (dm3)

n = number of moles

R = Ideal gas constant, 8.31

T = temperature in Kelvin

Answer 4

Take one typical balloon, and fill it up just the way you always fill them.

When it's full and you're ready to tie the end closed, don't do it. Instead,

take a big measuring cup, and pour the water back out of the balloon into

the measuring cup. See how much water you have in the measuring cup,

and you have the answer to your question.

If you want to be more scientific about it, do the same thing five times, and

write down the five different amounts it takes to fill five different balloons.

Add up the five numbers, and divide the result by 5. That gives you the

average amount of water it takes to fill each balloon, even if they don't

all take the same amount.

Answer 5

To find the volume of an inflated balloon, you can measure its diameter and use the formula for the volume of a sphere: V = (4/3)πr^3, where r is half of the diameter. Alternatively, you can submerge the balloon in water and measure the water displacement, which is equal to the volume of the balloon.

Answer 6

To find the volume of an inflated balloon you use the formula for sphere volume. The formula is V equals 4/3 times pi times radius squared.

Answer 7

weigh the balloon before inflating. then weigh the inflated balloon and subtract the two values

Answer 8

The recommended value is cubic meter (m3).