Recent content by Wreak_Peace

Homework Statement I'm trying to solve for the area moment of inertia of a curved arc. To visualize this, it would be like a bent piece of cardboard (two arcs with two lines connecting them at their end points). I'm modelling the differences in area MOI with an increasingly curved piece of...

So, because we don't know how far the disk will be, for calculating the center of mass, Xm = .8*1 + d*1.2 and I got .3411m, which is also incorrect, though much more reasonable. I think I was incorrect when stating the I of the disk, I stated the I of a disk around it's center + the M*d^2...

I assumed L was 2 meters because that was the length of the rod. Is L the distance from the center of mass to the pivot point?

Homework Statement The figure below shows the pendulum of a clock in your grandmother's house. The uniform rod of length L = 2 m has a mass m = 0.8 kg. Attached to the rod is a uniform disk of mass M = 1.2 kg and radius 0.15 m. The clock is constructed to keep perfect time if the period of the...

Bump.

I'm going to be working on a research project for an internship that involves photo-generated carrier dynamics, and after looking up the topic for a while, I haven't been able to find a source that explains what it is/means. I'd appreciate if anybody could take a minute to explain this concept...

Thanks, me and a couple of friends were stumped on that one.

Homework Statement Our question is \int (from 0 to 4) dt/ ((4t^2) + 9) (For a better representation, because I fail at LaTeX...

Was the mass of the car not given to you? Is the car going up a slope or down the slope? I believe you solved your mu correctly, but without the mass you cannot calculate the normal force (and therefore the frictional force) of/acting on the car, and neither can you solve for the Fd in this...

I totally understand this... (Sarcasm, but I do get your point, its not efficient) But I'm a stubborn person and you'd have to admit that it wouldn't be that inefficient in the busiest areas of an airport (Security Checking, Baggage Claims(Possibly on the baggage claim carousel itself?)) ...

The only reason I gave that link to the mit website which has basically the same stories and facts, is that the christan science monitor is not a reputable source, no offence to anybody.

They never mention piezoelectricity... They mention a fluid, which when compressed will create an electrical current.

http://web.mit.edu/newsoffice/2007/crowdfarm-0725.html And I agree with you on it not being a reputable scientific source..

http://www.csmonitor.com/2007/0926/p14s02-stgn.html?page "For two architecture students at the Massachusetts Institute of Technology in Cambridge, Mass., the sound of footsteps is an echo of energy gone to waste. They figure that the stomp of every footfall gives off enough power to light two...

According to: http://science.howstuffworks.com/environmental/green-science/house-music-energy-crisis1.htm "One footstep can only provide enough electrical current to light two 60-watt bulbs for one second" So that's 120 Watt Seconds .0333... Watt Hours 3.33... x 10^-5 KwH Atlanta Hartsfield...