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Calculus! For beginners, with a ‘no theorems’ approach!
[rquote=442430&tid=65532&author=chemrox]I had to reload my browser. Now about 2/3 of the pag ...		 19-3-2016 at 06:33
by: blogfast25
Calculus! For beginners, with a ‘no theorems’ approach!
[rquote=442409&tid=65532&author=chemrox]Calculus courses are all about the notation. I never ...		 18-3-2016 at 19:07
by: blogfast25
Preparation of elemental phosphorus
[rquote=442344&tid=65&author=Magpie]
Very interesting. But on a larger scale in a closed r ...		 18-3-2016 at 09:13
by: blogfast25
Combining the Rules and carrying out Substitutions:
In some cases several of the derivation/differentiation rules need to be applied to 'crack' a deriva ...		 18-3-2016 at 07:37
by: blogfast25
Brain teaser: rotational problem
@Metacelsus:

There's some really [i]counter-intuitive[/i] stuff that involves rolling-with-slippi ...		 17-3-2016 at 15:32
by: blogfast25
Brain teaser: rotational problem
My answer:

$$h=\frac{27}{10}R$$ 		17-3-2016 at 14:38
by: blogfast25
Brain teaser: rotational problem
[rquote=442244&tid=65628&author=Metacelsus]Actually, the moment of inertia of the sphere mak ...		 17-3-2016 at 14:25
by: blogfast25
Brain teaser: rotational problem
[rquote=442231&tid=65628&author=Metacelsus]New brain teaser (I hope it's OK if I post this i ...		 17-3-2016 at 14:05
by: blogfast25
Acquiring Uranium/Uranium compounds
[rquote=442195&tid=64423&author=Joe Skulan]

The pic is of coffinite (a U silicate- light ...		 17-3-2016 at 09:07
by: blogfast25
Acquiring Uranium/Uranium compounds
[rquote=442188&tid=64423&author=phlogiston]

Another source may be bentonite kitty litter. ...		 17-3-2016 at 08:58
by: blogfast25
Brain teaser: rotational problem
@wg48:

Yes, if the toy car's tangential velocity became zero at the highest point of the loop, th ...		 17-3-2016 at 08:31
by: blogfast25
Brain teaser: rotational problem
[rquote=442145&tid=65628&author=woelen]Initially I also thought that there was a second solu ...		 17-3-2016 at 06:31
by: blogfast25
Brain teaser: rotational problem
[rquote=442124&tid=65628&author=wg48]There are two possible solutions. One with the velocity ...		 16-3-2016 at 18:37
by: blogfast25
Brain teaser: rotational problem
[rquote=442108&tid=65628&author=woelen]
H = 3L/5

[/rquote]

Yes, woelen's got it.

C ...		 16-3-2016 at 16:25
by: blogfast25
Brain teaser: rotational problem
[rquote=442103&tid=65628&author=Metacelsus]I get H = 5/2 times the radius of the circle cent ...		 16-3-2016 at 14:20
by: blogfast25
More Rules for derivatives (and differentials):
Higher up, we saw two important rules of derivation/differentiation, the product rule and the sum/di ...		 16-3-2016 at 14:01
by: blogfast25
degraded MgO
[rquote=442080&tid=65603&author=soma]The problem with using MgCO3 for ascorbate in solution ...		 16-3-2016 at 13:02
by: blogfast25
Brain teaser: rotational problem
[file]49043[/file]

A bob is connected by means of flexible string of length [i]L[/i] to static p ...		 16-3-2016 at 12:50
by: blogfast25
degraded MgO
Yes, for preparing [i]any Mg salt[/i] some MgCO[sub]3[/sub] contamination is irrelevant. 		16-3-2016 at 09:03
by: blogfast25
degraded MgO
You'll need minimum 350 C for a prolonged time to calcine MgCO[sub]3[/sub] to CO[sub]2[/sub]-free Mg ...		 16-3-2016 at 07:52
by: blogfast25
Titrating Ca(OH)2
[rquote=442034&tid=65621&author=MeshPL]I was practising titrations at school and decided to ...		 16-3-2016 at 07:44
by: blogfast25
q-mechanics & relativity
[rquote=441868&tid=65606&author=chemrox]Do these both violate classical 2nd principle of the ...		 14-3-2016 at 18:43
by: blogfast25
Does CaO evaporate at 1000 °C?
[rquote=441858&tid=65600&author=macckone]Using a blow torch directly could evaporate CaO. B ...		 14-3-2016 at 18:12
by: blogfast25
Can any element have the electron energy levels of glass.
[rquote=441832&tid=65605&author=aga]There are no shells.

[/rquote]

Actually there are. ...		 14-3-2016 at 12:37
by: blogfast25
Dissolution of tungsten in H2O2
[rquote=441815&tid=65593&author=annaandherdad]
You are right that normal macrochemistry doe ...		 14-3-2016 at 09:18
by: blogfast25
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