Look up the theory of relativity; when more energy is added, the mass increases because e=mc^2, so it would increase by 10^-14 in grams if you added 1000 joules of energy by compressing it.
not sure about this but mass is a form of energy. e = mc^2 ... dont know if this has anything to do with it. but yeah, it would be hard to measure the weight of a compressed spring since if it would be compressed it would already be held up. maybe it does weigh more after all.
nope, its true. So if we were were to add 1,000 joules of potential energy to a spring, its mass would increase by 1,000 / (3*10^8)Â² or 1.113 Ã— 10^-14 grams.
False. Last I checked, there was no nuclear reaction so the kinetic energy is simply stored in the fact that you're compressing the atoms together, this does not change the mass. Applying the theory of relativity would be saying if 1 gram of mass underwent nuclear fusion, this much energy is created.
In theory it weighs more, but really that much amount of energy when calculated is not very much. It may weigh more yes. But by how much? Verrrrrrrrrrrrrrrrrrry little. Thx for the 2nd link I learned something new =)
make a small machine to compress it, weigh said machine without the spring, then weigh it while it is compressing the spring. Subtract the difference and you have the weight of the spring while it's compressed.
Well perhaps there's some homo-voodoo sciency **** going on that we don't know about. Based upon all the knowledge i have, it won't change in weight, but it's science, things are subject to change
OR you weigh the relaxed spring and a clamp together, then you put the spring in the clamp, tighten it, and weigh them both again. Find the difference!
but dude, u would need some badass ******* measurement, lets say if we were were to add 1,000 joules of potential energy to a spring, its mass would increase by 1,000 / cÂ² or 1.113 Ã— 10^-14 grams.
It IS a change in mass "bro". Weight is equal to the constant of gravity times mass. Since I seriously doubt compressing a spring alters the Earth's gravitational pull, a change in weight means a change in mass. The change in mass does not comply with conservation of mass therefore this cannot be true in a closed system.
If you were able to get every last drop of water out of the ocean into separate glasses, the amount of glasses of water you'd have would still be less than the amount of atoms in a single glass of water.
I think hes saying the amount of atoms in a glass cup. If the ocean were to be taken away, and filled with glass cups, all the atoms in all the glass cups would not equal the amount but actually be less then atoms of water in a glass cup
How one may explain this sentence to someone of primary school level:
If the ocean had enough water for 100 glasses
That glass of water has more than 100 atoms.
Therefore, the number of atoms in one glass of water is greater than the amount of glasses all of the World's oceans could fill.
Let's say glass contains 25 cl of water. The density of water is roughly 1kg/liter (let's ignore variations caused by temperature), thus we have 25 grams of water. The molecular weight (M) of water = M(O) + 2*M(H) = 16g/mole + 2*(1g/mole) = 18 g/mole (again, this is a rounded number). This leaves us with (25g)/(18g/mole) = 1.3888888... => 1.39 moles of water.
Avogadro's constant (6.022 * 10^23, or in layman's terms, a *******) tells us how many atoms or molecules there are in 1 mole, so if we multiply it by our 1.39 moles, we get roughly 837 000 000 000 000 000 000 000 molecules of water (837 sextillion for Americans, 837 trilliard for Europeans).
Now then, to test our fact, how much space would 837 sextillion glasses of water take? multiply it by 25 cl (20.925 septillion cl) and then convert this to cubic kilometres (1cl = 10^-14 km^3), giving us an end result of 209.25 billion cubic kilometres.
For our last step, we quicky google the ocean's total volume. (http://hypertextbook com/facts/2001/SyedQadri . shtml). These sources give us an average volume of about 1.35 billion cubic kilometres.
So then, our conclusion is that, not only are are there more molecules in a glass of water than there are glasses of water in the ocean, it's over a 100 times so.