jerryyu

But could you ground it first and then do the charring process?

A lot of people told me that you should heat the cattle bones first and then ground it in a mortar and sieve to obtain a small size. But does it matter if you ground it first or heat it first?

a long time ago i read something about the fact that the North/South poles are a second slower or faster(?) than lands located about the equator. It suddenly just re-occurred to me and i am just wondering if it's true or not and (if it's true) why is it slower or faster?

for example, food or other organic substances.

The more distant a galaxy, the greater the redshift. But is that really a vaild support for the expanding universe? The farther a galaxy is, its light will have to travel farther distances. The farther it has to travel, it will have a greater chances of interacting with atoms/molecules in space-as a result of the interaction, it will have less energy(thus resulting a red wavelength). So is the red shift really doppler effect or simply just the interaction of light?

the link is broken-just so u know

If one material have a higher band-gaps than the other material, will electrons from the higher band-gaps flow to the material with lower band-gaps? or does only the photon energies within the higher band-gaps flow to the other material with lower band-gaps?

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if they can absorb water vapor from air, weren't they react easily once expose to air? and which hygroscopic compounds are most reactive(that can drawn most water out of a substance)?

If hygroscopic compounds can absorb water vapor from air, can they also absorb liquid water from certain material( ex. water within a wet cloth or water within some other substances)?

http://web.mit.edu/newsoffice/2010/solar-antenna-0913.html "The antenna consists of a fibrous rope about 10 micrometers (millionths of a meter) long and four micrometers thick, containing about 30 million carbon nanotubes. Strano’s team built, for the first time, a fiber made of two layers of nanotubes with different electrical properties — specifically, different bandgaps. In any material, electrons can exist at different energy levels. When a photon strikes the surface, it excites an electron to a higher energy level, which is specific to the material. The interaction between the energized electron and the hole it leaves behind is called an exciton, and the difference in energy levels between the hole and the electron is known as the bandgap. The inner layer of the antenna contains nanotubes with a small bandgap, and nanotubes in the outer layer have a higher bandgap. That’s important because excitons like to flow from high to low energy. In this case, that means the excitons in the outer layer flow to the inner layer, where they can exist in a lower (but still excited) energy state." I am not sure if i got this correctly...so the photons excite the electrons in the nanotube to a higher energy level and since the inner nanotube has a smaller bandgap, the electrons from the outer layer flows to the inner layer? So basically they are extracting electrons from nanotube??? " the antenna would concentrate photons before the photovoltaic cell converts them to an electrical current. This could be done by constructing the antenna around a core of semiconducting material. The interface between the semiconductor and the nanotubes would separate the electron from the hole, with electrons being collected at one electrode touching the inner semiconductor, and holes collected at an electrode touching the nanotubes. This system would then generate electric current. The efficiency of such a solar cell would depend on the materials used for the electrode, according to the researchers." This may be my lack of knowledge, but how would the interface between the semiconductor and nanotubes separate the electrons from the hole ? and after reading this a several times, i still don't understand how "this system" would generate electric current

If the algae do not generate electrons and the electrons are there already. Are you saying that after all the electrons are used up, then the algae will die since there will be no electrons available for further reaction?

http://blogs.edmunds.com/greencaradvisor/2010/03/scientists-claim-they-can-steal-electricity-from-algaes-photosynthetic-electrons.html According to the article, when algae absorbs sunlight, they generate electrons. But all that sunlight is is heat energy, so by providing heat to the algae, it generates electrons?

my bad, i guess i kind of defeated the purpose of this website. I was asking a pretty straightforward question rather than trying to make a scientific discussion

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in my opinion, all religions have one big positive impact on the societies. They all created a sense of communities within the group-they helped each other and helped people to feel that they have a purpose in life and that they belong somewhere. Some people might argued that it(what I just said) also applied to the larger world, but the thing is it's very hard to find that common ground. And even if u did( like through workforce) it's really hard to trust that person if u're not sure that person will help u or not. And in all types and forms of religion, they all sponsored high-morality, which made the believers( Christians, Buddhists, Islam) look reliable.

someone told me that if u throw a baseball down the field, it will exhibit a wave-like properties( or basically every moving objects exhibit a wave-like properties) I'm just wondering if it's true or not

I am actually thinking about using that extra energy to power something else on the car

http://web.mit.edu/newsoffice/2010/batteries-nanotubes-0621.html "positively charged lithium ions travel across the electrolyte to the cathode, producing an electric current"-from the article i don't understand how that produces electric current. (someone please help me with the basic.) "In the new battery electrode, carbon nanotubes — a form of pure carbon in which sheets of carbon atoms are rolled up into tiny tubes — “self-assemble” into a tightly bound structure that is porous at the nanometer scale (billionths of a meter). In addition, the carbon nanotubes have many oxygen groups on their surfaces, which can store a large number of lithium ions; this enables carbon nanotubes for the first time to serve as the positive electrode in lithium batteries, instead of just the negative electrode. "-from the article "They found that using carbon nanotubes for one of the battery’s electrodes produced a significant increase — up to tenfold — in the amount of power it could deliver from a given weight of material,"-from the article my question is how does using carbon nanotubes, as a battery's electrodes, increase the amount of power it can produced?

if electricity can be generated through the motion of the bike's wheel, were,'t it generates more energy if it were to be placed on a car wheel?

It can be the disadvantages of certain technology. For example, the low-efficiency of a solar panel.