If you have a gas that is lighter then air, let's say Helium

>>8906165
>Fly away
No, unless you have a lot of helium and light container.
>What will happen
There will be a buoyant force acting on the container, so it'll weight less.

>>8906185
So how do you explain the Conservation of mass with what you just said then?

The mass in the system is constant. Mass is messuared in weight. You just said the container will weigh less, it doesn't add up.

>>8906165
It's the density that determines buoyant force. If you put a slab of solid helium or w/e in a container with air already in it and then heat it up, the total mass is now spread through the container. It does not magically turn into helium's normal density.

>>8906197
ah yes ofc, thanks. However is it not problematic that we use scales to messuare mass? We are really just messuaring the force and not the mass. Take the same scale to the moon and it will show a different number on the scale

>>8906194
>Mass is messuared in weight
That's wrong. Weight is measured in weight.

>>8906185
I'm surprised we don't use helium to manipulate the weight of objects. Imagine if you could design a vehicle that can travel by air through the storage of large amounts of helium in certain sectors. We could practically create a rocket if we manipulated the weight of objects more often.

>>8906213
look up values of g across the earth's surface (it does vary a little)
Unless your scale is precise enough to (it's not) you aren't going to see any change.
Unless of course you went to the moon, but that's not really common enough to be a problem for most scales...

File: 2017-05-13-17-18-48--792972485.png (7KB, 297x170px) Image search: [Google]

7KB, 297x170px

>>8906165

No. Something floats because it weighs less than the stuff around it. The closed system won't magically lose mass. Please, read up on buoyancy.

Also, the helium might not even become a gas, or a liquid. It depends on the final temperature and pressure of the system.

Either 8/10 bait
Or 1/10 shit post.

>>8906165
Your container will explode. Never heat a closed container regardless of what's inside.

>>8906165
If the container does not increase in size, then the solid will never become a gas no matter how hot you make it. The pressure inside will build, but it will remain a solid because there's no space into which it can expand.

If the container is not designed to take that much pressure, it will burst and all the gas will be released.

If the container does expand, then it will float away.... unless it's super heavy.

>>8906194
It's a matter of relative density, not total mass.
How do you think those big steel ships float? Or a fish? How do you think an airplane or a bird flies? Or a hot air balloon? It's all about relative density.
Oil and water - even if there's more oil by weight than water - the denser material sinks, the less dense floats.