Recent content by johnny872005

I'm still somewhat confused. What would you say as the final answer to the two questions I have above...? If you could just list something like: answer: thefunc reason: because x y and z Sorry if it seems bossy, I'm just really confused now after reading the above. thanks

Hi Guys. I'm trying to understand how to solve the following problem. Any help and explanation would be greatly appreciated! thanks. Let X and Y be independent N(0, 1) random variables and let Z = X + Y. What is the distribution of Z? Write down the density function of Z. Also: Show...

Ok guys, I am a bit confused on this. Does anyone know a good site that has a list of equations for just this? (like angular velocity, etc?) Or even better, a website that TEACHES it? Like I seem to be running into 2 problems while doing this homework. First of all, some questions are like...

nope, I got fitzpatrik phy 317k at UT ;)

just wondering, how do you combine series? I believe that springs and circuits are done the same way. If I am combining 2 spring constants for the combined constant, isn't it just 1/k(constant) = 1/k1 + 1/k2 and just solve for k?

still lost lol. So do I just use the smaller one? What is wrong with my math in my first post?

sorry, but I still don't get it. I understand what you're saying, but my main problem is, in my mind, I see the block being crooked

ok guys I'm working on this problem: http://img238.imageshack.us/img238/1457/b15bf.jpg now, I think the answer is 7.0149 because the force of the block is 47, and when u divide by the bigger spring constant, 6.7, u get 7.0149 The other one expands more. I think the question is worded...

are u talking about 13kN/m? What I have shown you is all that the question gave me

i'm still confused on how to calculate the velocity of the blcok after the spring pushes it off. Also can you please explain how to calculate speeds involivng friction? Truthfully, I didnt quite get it in cdlass, and I wasnt paying attention 100%, i wasnt focused that day.

well for that one I didnt really know where to start. I've done all the other problems before it mostly. I would thing for that one, i'd need to use the x distance and velocity formulas, same as the ones that are used in projectile motion

ok guys, I'm a bit stuck on this one. Please look at the images below (this is for problems 11 12 and 13 (they go together) http://img70.imageshack.us/img70/9058/a17yi.jpg http://img70.imageshack.us/img70/2062/a20mf.jpg thanks!