# Recent content by Codester09

1. ### Rotating multiple objects around an axle?

I'm looking for a way to rotate blocks. There is a single axle going through the blocks.. say there are a dozen of them. I am trying to figure out a way to rotate each block individually to one of the 4 sides based on different inputs. I am also trying to accomplish this with a single motor...
2. ### Wrapping Function

Homework Statement A particle moves with constant speed in a circle with a radius of 5m in a counter-clockwise direction. It makes 1 revolution every 16 seconds. What is the average velocity for 1/4 revolution? 5/4 revolutions? Homework Equations Wrapping Function: W = (cos t, sin t)...
3. ### Derivation Using Limits

Yea, you're definitely right. Thanks! Been a while since I had to do that.
4. ### Derivation Using Limits

Homework Statement Find the derivative of the function f(x) = sqrt(x). (Bear in mind that cannot use the power rule or anything like it. I must use limh->0.) Homework Equations limh->0 (f(x+h) - f(x))/h The Attempt at a Solution I'm getting hung up on expanding out the...
5. ### Cool Physical Phenomena Objects?

Ya know, rare earth magnets and crap like that. Anybody know of some other cool things to have sitting around the house?
6. ### Range of a Function

Well the range of 25 + (x - 3)2 is y >= 25, right? So, the range of sqrt(25 + (x - 3)2 is y >= 5? Yea, I think expanding the (x - 3)2 term messed me up. I was thinking that i was possible for the radicand to be a negative number.. ugh. Stupid mistake. Thanks a lot for the help.
7. ### Range of a Function

Homework Statement Find the range of h Homework Equations h(x) = sqrt(25 + (x - 3)2) The Attempt at a Solution I factored out the (x-3)2 and simplified to get sqrt(x2 - 6x + 34) I was trying to figure out the domain first, knowing that x2 - 6x >= -34 in order for the...
8. ### Should I even attempt becoming a physics prof?

This is the one occupation that I'm sure I would love, but the more I read on it, the more impossible it seems that I will land a tenured university position. I'm a 1st year student at Michigan State and have a 3.9 at the moment. I imagine I'll end up in the 3.75+ area after my physics...
9. ### Physics Undergrad: Transfer from UWaterloo to Mcgill?

You're at WATERLOO. I don't think their program is disorganized.
10. ### Aiming my dob

http://gibbscamerahouse.com.au/images/COLDOB10sm.gif [Broken] if you look at my scope, you'll probably notice that when extended, the actual "tube" part isn't near the middle of the scope.. if I mounted it with an eq, i don't think the fulcrum would be centered. i think i'd have the same...
11. ### Aiming my dob

Is there a way to mount my telescope to an eq mount?
12. ### Aiming my dob

Is there an guide on what parts to get/how to assemble one anywhere? Sounds like a useful investment.. it'd just be nice to see how other people have done it before I go blow \$40 at home depot.
13. ### Aiming my dob

Yea last night I was pretty desperate and strapped a 5lb. dumbbell on it with my belt. It was good when I looked at things near the horizon.. but when I had to aim up, it was too heavy and kept drifting up. Are counter-weights a regular part of viewing with a dob for everyone else? If so...
14. ### Aiming my dob

..sucks. I have the Sky-Watcher 10" dob (got it for xmas). All around, it's a great scope for the cost, and produces some very crisp visuals of surprisingly distant objects... when it can center on them. I find myself having to constantly aim higher than the object so my telescope will "fall"...
15. ### Favorite music?

What are some of you guys' favorite artists/bands? Just wondering =) I'm a big Tool fan, anyone else?