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We had to do it at sixth form, and again in my nuclear physics class. Only this time with mass deficits and the like. Funky stuff.Yeah, I figured it'd be something like that. Can't say I've ever done that kind of calculation before.
Francium has a high ioniziation energy because it has a low electronegativity and a huge atomic radius. Basically in solution it's ionic bond will break very easily. This is why hydroiodic acid is considered a stronger acid than hydrofluoric acid. Iodine ionizes more so than fluorine.
I suppose the efficiency of an reaction would be based on its speed and how much of the reactants are used to produce the products. Some reactions even in excess of one reactant will go less than 100% to completion. Others will go to 100% completion.
5lbs of potassium metal into a river
We had to do it at sixth form, and again in my nuclear physics class. Only this time with mass deficits and the like. Funky stuff.
You're in a sealed room, their is a scale on the table & a open Jack-In-The-Box.
You have to make the Jack-In-The-Box weigh more.
How can you do this without adding anything to the Jack-In-The-Box?
Breathe much, until you replace the heavy oxygen with lighter carbon dioxide? Thus removing air resistance and increasing the weight on the scales.
EDIT: Ah, beat to it.
Turn it upside down, wind it up, it pushes the scales down when it springs?
YepTurn it upside down, wind it up, it pushes the scales down when it springs?
Close it.
Does the act of closing it create extra pressure as the air momentarily pushes down on the box? Or does it seal the air inside, thus causing the air to be part of the box?Yep
Close it.
That's all you need to do.
Now why??
But the spring wouldn't push down on the scales, it would push the box apart. The scales wouldn't fell anything... would they?Closing it a) seals air into it and b) more importantly seals potential energy into the springs which push up on the lid and down on the box pressing it into the scale harder.
Closing it a) seals air into it and b) more importantly seals potential energy into the springs which push up on the lid and down on the box pressing it into the scale harder.
a[sup]2[/sup] = b[sup]2[/sup] + c[sup]2[/sup]?a) only if it's air tight, I've not seen one that is yet.
b) true it would add more energy, second part isn't quite right though.
Think of a classic formula now...
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