Recent content by Gewitter_05

Homework Statement Helium-neon lasers like those we've used in lab typically have power ratings of 1mW. They produce monochromatic light with a wavelength of 632.8 nm. Recall that c=λf I solved a and b, correctly I assume. I am having problems with c and d. c) At the power rating...

That's what I am thinking, but I don't know. I don't really have much else to go on. There might be more to go on and I just am not seeing it.

I did look in my book and I my old notes. I just found my old notes because this is my second time taking Physics I. I thought there might be something in there. The book also shows that F/A = delta L/L. In my notes it mentions that delta L is the change in length over the original length. So...

Homework Statement An Aluminum cable of length 3.5m has 15,000 N tensile force acting on it if the wire is only allowed to be stretched by 1mm before it breaks, What must be the radius of the wire if the Young's modulus of Al is 6.9 x 10^10 N/m^2? I am also supposed to find the tensile...

Cool. Thanks!

So would I change the distances by subtracting the number from the fulcrum. Instead of mB being 1.2, it would be 0.8, mC 3.4 and mA 2?

Three people are balanced on a uniform seesaw -- Torque Homework Statement Three people are balanced on a uniform seesaw which has a weight of 150 N as shown in the figure. Find the mass of person B and the normal force acting on the fulcrum. Homework Equations Tcw=Tccw The...

Homework Statement A 10-kg block is released from point A. The track is frictionless except from the portion between B and C which has a length of 3.0 meters. The block travels down the track, passes through BC and first collides with a small block (m=2kg), then they travel together and later...

Homework Statement A car accelerates from rest at 1.2 m/s^2 for a distance of 30 meters, after that it remains constant speed for 5 seconds, then it decelerates to a full stop in 4 seconds. Homework Equations d=1/2at^2 v^2=v0^2+2a(x-x0) (x-x0)=Vot+1/2at^2 The Attempt at a...