Recent content by Medtner

Could someone provide a good explanation as to why light's frequency doesn't change under refraction? The textbook I'm using gave us a two step derivation and I don't really feel like it did a proper job in explaining anything (it's Haliday). Also, a slightly *crackpot* follow up question -...

Although your explanation is similar to the textbook's, you managed to clarify one thing that they pretty much glossed over which helped a lot. Thanks so much, and yes it's Stewart.

It's calculus 3 question My textbook does a horrible job at explaining the differences between Type I and Type II regions for z =ƒ(x,y) functions, and Type 1, Type 2, and Type 3 for B=ƒ(x,y, z). And when integrating over these "D" regions, the method of integration doesn't really seem to be...

Where did you get the 2b from?

Wait, 19/2? y=mx+b For the slope i got (-3/2) used point (3,5) 5=-3/2(3)+b 10=-9 19=b Did I do something wrong?

(0, 0), (3, 5), (1, 8) Find the slopes and equations for each line (0,0) ----> (3,5) = 5/3x (0,0)---->(1,8) = 8x (1,8)---->(3,5) = -3/2x+ 19 Then I set up the integrals (on x) Integral sign from 0 to 1 (8x-5/3x)dx + Integral sign from 1 to 3 [(-3/2x+19)-5/3x) dx I got 117/4 as an...

So I'm trying out various practice problems and for some reason I can't get the same answer when it comes to problems involving natural exponentials. Here's the problem A type of lightbulb is labeled as having an average lifetime of 1000 hours. It's reasonable to model the probability of...

*facepalm* Silly me, I should read questions more carefully. Forgot to absolute value on both parts, only with a it work out by luck! Thanks.

Homework Statement An electron that has a velocity with x component 2.1 × 106 m/s and y component 3.1 × 106 m/s moves through a uniform magnetic field with x component 0.035 T and y component -0.16 T. (a) Find the magnitude of the magnetic force on the electron. (b) Repeat your calculation for...

"Write out a series of three or more different whole numbers in geometric progression, starting from one, so that the numbers should add up to a square. So like, 1 + 2 + 4 + 8 + 16 + 32 = 63 (one short of a square)"(can't find an actual real life example) I can't seem to find an answer for this?

After playing around with the equations I got it. Thanks for the help! I should pay more attention to the variables. :D I ended up going like: T-mg=-ma -----> T=-ma+mg T=Ma -----> (plug in eqquation number 1) -ma+mg=Ma ----->Ma+ma=mg------->a(M+m)=mg----->a=mg/M+m Would this set up be okay?

Homework Statement Figure 5-12 shows a block S (the sliding block) with mass M 3.3 kg. The block is free to move along a horizontal frictionless surface and connected, by a cord that wraps over a frictionless pulley, to a second block H (the hanging block), with mass m 2.1 kg. The cord and...