Recent content by gloo

The scale will show less weight once the object is floating on top of the surface

the object will start to move up to the surface

1. In your case with the teeter - no weight is added 2. the weight added in the first place (my scenario) - was my force pushing the hollow object down which then displaces the water higher. My force is causing the water to displace up 3. No weight is added in your scenario because you tethered...

Sorry, I thought you said it would flow out of the container. Ignoring the weight of the container it would be 10 pounds - the weight of the water because the object that is buoyant is tetthered to the bottom

Ignoring the weight of the container it would weight less than 10 pounds I am assuming because the water spilled over the top and does not weigh down on the container anymore.

If tethered to the bottom it will weight the same since it is now part of the system. But my scenario is that it is not attached to the container but in the midst of floating to the top - but still submerged. The submerged object will still have displaced a volume of water up.

I was wondering - if you had a container of water and you push a hollow object that is buoyant to the bottom so that it is completely immersed - the whole container will be heavier because of water being displaced up in the container. Now if you release your hand or whatever you use to hold the...

Sorry Berkeman -- I don't have any real concrete application that I am aiming for -- just one of many though experiments that float through my head as I see things (see response to Nik above). Thanks for your time.

Actually, can you expand on what you mean about Ferrofluid being switchable? I know from Google etc.. that a higher magnetic field can possibly induce a 20g/cubic centimeter density. But unless the magnet is the size of godzilla, the 20g/cubic meter can only be achieved on a flat bottom of a...

Thanks Nik -- I appreciate your time and consideration of my thoughts. As for my application I don't really have one yet that is going to be used. I was watching Crimson Tides (Denzil Washington, Gene Hackman) and the subs motor died and it took on water in part of its ballast. The sub was...

How did I jerk you anyone around in the dark? They asked a question and I answered it the best I could. If this forum is only meant for engineers and physics professors than I don't get why it exists? I get a lot of snide comments from some advisors but I never retaliate and just look the...

Why are you getting so impatient ? I have asked my questions in a pretty straightforward method. I am not an engineer or some physics student who can formulate any question of the top of my head without having some ambiguities. Asking about how dense a ferrofluid can be made is not that obvious...

Ah ok -- barium sulfide is soluable but not barium sulfate. Sorry.

So what is the maximum density that you know a ferrofluid can be made to?

So I read the Barium Sulfate is not soluble in water -- does that mean after a time, it would settle to the bottom? Thus you need to constantly keep mixing it? What about bentonite? I can't even find the density on this liquid compound?.