Everyday buoyancy experiment problems come down to one relationship between 6 figures. This calculator takes density (ρ₂), density (ρ), gravitational acceleration (g), height (h), ball radius (r), submerged volume (v₁) and turns them into submerged volume (v₂) and buoyant force (f₁), with the working shown so you can check the result rather than simply trust it.
What Is the Buoyancy Experiment Calculator?
It is built around submerged volume (v₂), buoyant force (f₁), buoyant force (f₂), and it works the same way whether you are checking a homework answer, confirming a colleague's figure, or working something out for yourself. Everything runs in your browser, so nothing you enter is uploaded anywhere.
How the Buoyancy Experiment Calculation Works
Nothing is hidden: each output is worked out from the values above it, which makes it easy to see where a surprising answer came from.
The relationship between density (ρ₂), density (ρ), gravitational acceleration (g), height (h), ball radius (r), submerged volume (v₁) and submerged volume (v₂), buoyant force (f₁), buoyant force (f₂), ball volume (v), diameter (d), density (ρ₁), mass (m) is fixed, so the same figures always give the same answer. That makes it a good cross-check: run the numbers a second way and see whether the result agrees.
Getting a Result You Can Trust
For anything that matters, write the inputs down next to the result. A calculation you can reproduce is worth far more than a number you cannot explain, and it takes a moment to record density (ρ₂) and density (ρ) and gravitational acceleration (g) and height (h) and ball radius (r) and submerged volume (v₁) alongside submerged volume (v₂), buoyant force (f₁), buoyant force (f₂).
Frequently Asked Questions
What do I need to work out submerged volume (v₂)?
Enter density (ρ₂), density (ρ), gravitational acceleration (g), height (h), ball radius (r), submerged volume (v₁). The calculator then works through the relationship and reports submerged volume (v₂), buoyant force (f₁), buoyant force (f₂).
What does the buoyancy experiment actually calculate?
It takes density (ρ₂) and density (ρ) and gravitational acceleration (g) and height (h) and ball radius (r) and submerged volume (v₁) and converts them into submerged volume (v₂), buoyant force (f₁), buoyant force (f₂) using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter density (ρ₂)?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Why does a small change in one value move the answer so much?
That happens when an output depends on a ratio, because dividing by a small number magnifies any change in it. Check the units first, then check whether the value you entered is in the range the relationship was designed for.
Can I use this for a quick estimate as well as a precise answer?
Yes. The calculator is built for quick checks, so round your inputs to a sensible number of significant figures and the result will be just as useful. If you need more precision, keep the same method and add digits to the inputs rather than adjusting the method itself.