Recent content by spizma

I took pre-calc last year, and I caught onto almost everything very quickly and found most of the homework easy. However, when we had a chapter on counting methods (combinations and permutations) and probability, it was the complete opposite and had me spending significant amounts of time on...

Building something like a robot would definitely be fun, but I'm not sure where to start to learn how to build one. Are there any good books/websites?

There is a Science Olympiad team at my school, but no real science club, so I was thinking of forming one. However, to be honest, I don't really know what people do at science clubs. I was thinking we could do some interesting experiments, but I'm not sure what else, if anything. I'm thinking...

I'm about to be a junior and I'm planning on trying to get into the Summer Science Program (http://www.summerscience.org/home/index.php" ) next year, but I'm having some doubts about my chances of getting in. My work ethic was really non-existent my freshman year, so I ended up with a B and C...

I heard from a person that his physics teacher told him that if every person were to gather in one area on the Earth and jump at once the Earth would not get any extra motion. He said the reason for this was that the Earth is a closed system. Is this right? If it is could someone please explain...

The reason particles move from high to low pressure is because they aren't being hit by other particles as much in the low pressure area, and therefore are pushed towards it by the high pressure area particles. If there is no temperature, absolute zero, there is also no motion of the particles...

In the case of subatomic particles, what kind of potential energy is it?

I'm doing a nuclear chemistry project right now, and I am able to solve all of the problems involving binding energy and mass defect, however I have one conceptual question. Why is it that when the nucleons combine with each other they let off energy? At first I thought it was their kinetic...

If you had an extremely large mirror and an extremely sensitive telescope, it should be possible if nothing is in its way, but something like that is completely unfeasible. Something slightly more likely, but still no where near possible today, is the use of a wormhole to travel far away in a...

You could try using the Stefan-Boltzmann law: L=4{\pi}R^2{\sigma}T^4 Where L is luminosity, R is the radius of the stellar object, T is the temperature, and sigma is the Stefan-Boltzmann constant. (http://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_constant" ) and then the inverse...

You forgot to square the initial velocity in the second equation.

Your conversion from hectares to km^2 is incorrect. To figure out what is correct start with the equation 1,000,000 m^2 = 1 km^2. Then convert the 1 million m^2 to hectares, and then solve for how many km^2 are in one hectare.

Heres a hint: I would start by figuring out how many kilometers squared there are per hectare, and then multiplying by 80. If you know that then you already have the top area converted to km. You seem like you know what you should do from there.

Thanks guys for giving me some names to look at, and reminding me that I really don't need a super duper calculator that can do everything and then some yet, if ever.

I just started taking pre-calculus the other week, and I've now realized how useful a graphing calculator is for that class. What graphing calculators are the best? I'm looking for ones that are allowed on the SAT's and ACT's.