Recent content by psyhprog

I think I understand it now, thanks.

Yes it does. What you're saying is that in an system in equilibrium, every point is at equilibrium, and so for certain points like the one where the mass meets the string, there is a "tension force" to account for the equilibrium. When in fact, the "tension force", is simply the normal, directed...

Thank you for the link, it's useful, and helped clarified things a bit. What I meant was: consider the following situation: an object of mass m is suspended by an ideal string. So then there's the gravitational force, G = mg pulling the object down, which is transmitted through the string...

As far as I understand, the wires in classical Newtonian mechanics are inextensible, unbreakable and so forth. The part that confuses me is that sometimes there are two tensions in the wire, or rather the tension is in both senses. Is that because there are opposing forces acting on the two...

Homework Statement There's a metallic rod of length l1 which is spinning around a vertical ax which passes through its center. The ends of the rod are spinning with ω1 angular speed. Homework Equations Determine the temperature at which to heat the metal rod so that the angular speed of...

Thank you for your answer, I think I get it. One more thing. When you're dividing by something like 2,5 , how do you do the division? I remember that for multiplication you did it normally, you counted how many decimals each number had, you added them up and that's how.many decimals the result has.

I originally wanted to post this in the EE forum, but after seeing the sticky there, I decided that this might be a better place. 1. I got the whole thing about unit conversions (like from V to kV, move the decimal point 3 to the left -- the number becomes smaller by 10^3). Right now, we're...

So they would behave kind of like gears? and since what you said is true, the rod (hollow) will also experience a much weaker artificial gravity, right?

I was recently reading about artificial gravity and generating it in space, especially by centripetal force using Stanford Tori and Bernal sphere (only Wikipedia and these to articles, but if anyone has any more resources, I would be glad to read them, I couldn't find anything else in my...

I have a quiz on Tuesday at chemistry, and I began reviewing for it. The subject is the Ideal Gas Law. I pretty much got the hang of it, except that I have one tiny problem. I'm kind of rusty on chemistry, and that's preventing me from getting a good grip. I've looked on Wikipedia, but it seems...

Is there anyway to find out or approximate how much carbon dioxide a person produces per day, how much oxygen does a plant produce per day. And do different species of plants produce different amounts of oxygen?

I'm working on a project for a space habitat, and I want to have the math to back it up. By the way this is not homework, it's just something I do in my spare time. And if you have the links where I can learn more about these things, just provide those and I'll learn on my own. Is there any...

I'm working on a project for a space habitat, and I want to have the math to back it up. Sorry if some of these seem obvious or too simple, but I'm here to learn. By the way this is not homework, it's just something I do in my spare time. And if you have the links where I can learn more about...

This is the chapter of the book that I got that from http://www.bartleby.com/173/15.html. I am familiar with the concept of derivatives, but I'm just learning calculus and can only do some basic ones. What I was wondering was what is the expression of kinetic energy (of a mass m) from STR...

I have recently bought Einstein's book on the General and Special theory of Relativity and I have finished reading the first half (STR). I understood the ideas and concepts being discussed, as well as the Lorentz transformation, but I have only on question, how did he obtain the relativistic...