Excru

I would do the experiment myself if I had the things. :/

Anyway, I think that a balloon filled with helium will deflate faster because

1) Smaller size due to it having 2 electrons, hence it can easily escape the balloon and;

2) It is a monatomic element, unlike hydrogen gas which exists as molecules made out of 2 hydrogen atoms. Hence, the helium balloon will still deflate faster because it is smaller.

However, the RAM of helium gas is 4, and for hydrogen gas it's 2. Hence, the hydrogen balloon will deflate faster as it has a smaller RAM, which means faster speed, hence the hydrogen balloon will deflate faster.

So what's the answer?

In case you still can't see how it looks like.

http://www.freeimagehosting.net/yfmqy

Possible to prove? Or is it just a 'rule'?

Which do you think is more efficient in preventing flooding?

I know realignment is the straightening of meandering river courses, which makes the speed of flow go faster and reduces flooding, but downstream areas might get more floods.

Resectioning is the widening and deepening of the river to increase capacity, but uses lots of manpower and resources.

Which is better and more efficient?

http://i40.tinypic.com/f418jp.png

Since the derivative of ln(x) is 1/x, it follows that the antiderivative of 1/x is ln(x).

Which probably means that the antiderivative of 1/u^(1/3) is ln[1/u^(1/3)], like the picture provided.

But my answer says that it is incorrect, why? They changed it to u^(-1/3) and used the power rule of integration.

Does the ln(x) only work when the polynomial is of degree -1?

Is it possible to use the L'Hopital's rule? I think it's possible, since you get Infinity - Infinity.

The answer sheet says it's 0, but I got 1.

E.g. vegetables =/

Maybe genetically modifying?

For example, how do you pronounce

d/dx tan x = sec^2 x

and

csc, cot?

Ba(OH)2 + H2SO4 -> BaSO4 + 2H2O

I get

OH- + H+ -> H2O

but my paper says it's wrong.

http://img69.imageshack.us/img69/1377/questionay.p...

Is it

Guan1 Ka3

or

Guan1 Qia3

?

Google and the way I was taught this way says it's Ka.

My Chinese character input and China friend says it's Qia.

I have a friend who is 14 years old and he has mild scoliosis. She's scared of going for surgeries or wearing a heavy brace.

1) Can good posture improve scoliosis?

2) What exercises are recommended? (She can't swim)

3) Will scoliosis still get worse even after fully maturing? (i.e. when she's an adult and the body stops growing)

4) Her curvature is towards her left side. Should she place her schoolbag weight towards the left or the right?

5) Will the curve get "fixed" on its own over time if there is continuous good posture?

I had a website once, but it stopped working. :/

I would appreciate if it is a step-by-step guide, like for example, starting at Integer Axioms first, then slowly moving up to higher difficulties.

I want to learn Number Theory, but I don't know where to start. :/

http://img695.imageshack.us/img695/8201/netforceze...

A container which is equally divided into two, contains 2 substances, substance A and substance B. The box has the SAME density as the liquid. Substance A is has a density of 1kg/m^3. Substance B has a density of -1kg/m^3. If the box was submerged in the middle of the liquid, will the box float, sink, or stay there? Also, assume that the buoyancy of the liquid has the same strength as gravity.

Here's the diagram.

http://img687.imageshack.us/img687/264/agfasgas.pn...

I only know the formula for series and parallel, but this... :/