Recent content by Zukie91

whoops, typo, meant 4500 nm

right, what i have there is the diameter, so i would divide by two and the final answer would be 450 nm. Thanks

well, if there are 30 fringes, and each integral number wavelength phase dfference corresponds to a thickness of half a wavelength, would that mean at its thickest, the width is 15 wavelengths or 9000 nm?

Homework Statement An air wedge is formed between two glass plates separated at one edge by a very fine wire. When the wedge is illuminated from above by 600 nm light, 30 dark fringes are observed. Calculate the radius of the wire. The attempt at a solution Wasn't really sure how to go...

oh, duh, thank you so much. really appreciate all your help

wait, what did i forget to square?

still not getting it :( I'm closer but not right yet i'm doing deltaPE=deltaKE mgh1-mgh2=1/2Mv12+1/2mv22 (60*9.8*.14) - (.12*9.8*2.86) + 30v12 + .06v22 78.96=30v12 +.06v22 then using the proportion v1/v2 = .14/2.87 i get that v2 = 20.5 v1 substituting that in for v2 i get 78.96=31.23v2...

ok i don't think I'm really getting anywhere, would you mind setting up the eq, and i'll try to figure out what i was doing wrong from there?

were you able to get the correct answer with this method, because i think i get what you are saying, and cannot get the problem right using any combination of m and h

what is minus? and how does this only have to do w/ pe and ke, and nothing to do with rotation, if its rotating around an axle?

so am i going to be using 1/2mv^2i + mghi = 1/2mv^2f + mghf i'm not sure when i should use which mass, or if i should add/subtract them

it says the whole rod is 3.00 m long, and that the axel is 14.0 cm from the larger mass, which means its 2.86 m from the projectile right?

i appreciate you help btw, do i need to use torque? i'm sorry I'm just not getting this problem and how do i use pe if i don't have the height? oh wait, would the 14 cm be the height? and i made a typo on the answer, it should be 24.5 m/s not 24 m/s

i noticed that there is another thread asking the same question which nobody replied to. On that thread, under relevant equations, KvnBushi listed this K = \frac{1}{2} I_{cm} w^2 + \frac{1}{2} M v_{cm}^2 is that actually relevant? ok i can't get that latex code or whatever it is to work...

Homework Statement 1. Homework Statement A war-wolf, or trebuchet, is a device used during the Middle Ages to throw rocks at castles and now sometimes used to fling pumpkins and pianos. A simple trebuchet is shown in Figure P8.77. Model it as a stiff rod of negligible mass 3.00 m long and...