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anyone got some good web sites about experiments of physics? I would like to do a few experiments but i am not very sure the procedures.I dont want my house blown off !

i need some helps....how does acid affect the ionization of water ? ....how does acid affect the ionization of water ? if there are more hydroximum ions in the solution,what will the change of ionization of water?

it seems that these kinds of animals can prevent blood going throught the lung (pulmonary vein,artey)Can anyone clarify it plz?

i think it's ok for any area .

hi everyone ~ Does anyone recommend some good books for me?i am studying at secondary school, which is in hong kong.

how does ions affect rusting

Cells with thick wall can support the whole organisms. Then what is the function of thin wall?

In my poor knowledge, wave is created by a disturbance and meanwhile the particle just move upward or downward in a transverse wave . However , light seems a different one . It is move! can anyone explain it for me please?

yeast is regarded as Fungi

Of course it surelly helps but I think Kyoto doesnt help so much to the Earth . It use 'carbon sink' policy , that mean it focus carbon dioxide this greenhouse gas only . Excluding Co2, methane , CFCS , Nitrogen dioxide are also greenhouse gases.methane has the greater effect of enchancing...

can pure molten hydrochloric acid conduct electricity?

I think no distinct dry reason along the intertropical convergence zone

thx Asking this question because i heard my friend saying that skeletal muscle cells give alcohol when respire anaerobically.

What is the by-product when skeletal cells respire anaerobically ?

global warming the enchanced of greenhouse effect.Most of the reasons is excess greenhouse gases, such as carbon dioxide.they are good at absorbing longwave radiation (heat) and weak in solar radiation. The sun heats up the ground , the ground emits heat as a longwave radiation. So the...

Actually how does mountain form? By constructive plate boundies? or what?

why does astronaut feel ' no weight ' when in space?

Yea. i think those statements are incorrect.I post them here because my teacher fancy that they are correct. i respect him so i didnt query it in the lesson. Instead i found help from here^^ now i can ask him about this. Thanks!

which type of rains are most powerful?

Why mineral salts are not considered as energy ? Why mineral salts are not considered as energy ?

1.Which newton's law describes inertia is proportional to mass? 1st or 2nd? 2.An object is on a slope, the graph of v-t shows that there is negative acceleration, how do you explain it ?

why doesnt Coriolis force affect the wind speed but only the wind direction?

what is the relationship between Algae and pH value? why there are more algae ,pH value rises?

Northern summers are hotter than southern summers. Northern winters are colder than southern winters.

What is meant by 'weather element" What is meant by 'weather element"

WHy OXygen can react with metal?As i know , oxygen(O2) is bonded by covalent bond and it should be neutral charge. So how can the metal react with oxygen?

a) global temperature become lower b) the earth warms up due to CFCs is a greenhouse gas c) CFCs lead to ozone depletion and hence more ultraviolet rays come in so it is warmer CFCs is also a greenhouse gas

Protease and Enzymes what is function of protease? IF it digests protein, then will it digest enzyme as enzymes are made of protein?

oh..that's great. yours even better than my school's

so which one's infra rays wavelength are longer, sun's or human body's? I ask this question because i think infra rays have consist of many different waves