Recent content by dinospamoni

Would you mind explaining how you got part A? I can't figure out how you did it.

Homework Statement A certain die is weighted such that probabilities of showing a 1, 2, 3, 4, 5, and 6 are (6/34), (8/34), (5/34), (3/34), (8/34), and (4/34) A) If two such dice are thrown, and you are told that the sum of the two is 10 or larger. What is the probability that the...

never mind I figured it out!

Homework Statement You will recall from our discussion of the Franck-Hertz experiment that the energy difference between the first excited state of mercury and the ground state is 4.86 eV. If a sample of mercury vaporized in a flame contains 1.06×1020 atoms in thermal equilibrium at 1563 K...

I included what was asked for in the title, but forgot to include it in the question. It's asking for the wave velocity, frequency, and period. I accounted for the finger being lifted off by making the wavelength twice the interval between the finger and the origin. Is that not right?

Homework Statement A musician frets a guitar string of length 1.5 m at x = 0.34 m with one finger, and simultaneously plucks the string at x = 0.17 m with another finger (raising it to a height h = 2.1 mm. Both fingers are simultaneously removed from the string, and it is allowed to vibrate...

That is definitely the problem. Thanks a ton!

I'm not sure how I messed that up, but I totally didn't use that equation. What I actually did was solve for lambda and then used the equation N_{0} = \frac{R_0}{\lambda} and got N to be 2.418, but that's wrong

Homework Statement The half life of a particular isotope is 10.84 days. Find the number of atoms of this isotope that would be necessary to produce a sample with an activity of 1.79 micro-Ci. Homework Equations R=N_{0} \lambda e^{-\lambda t} where R is the decay rate lambda is the decay...

I figured out what I did wrong, but thanks!

And I figured out the summations from just looking at these in terms of n: a_{n} = \sum\frac{(-1)^{n}2}{n\pi} b_{n} = \sum\frac{-2}{\frac{n}{2}\pi} and then to get rid of the 0s I made it in terms of m: a_{m} = \sum\frac{(-1)^{m}2}{(2m-1)\pi} b_{m} = \sum\frac{-2}{\frac{4m-2}{2}\pi} The...

Whoops sorry, I forgot I didn't do this all in mathematica: a_{0} = 0 a_{1} = \frac{-2}{\pi} a_{2} = 0 a_{3} = \frac{2}{3\pi} a_{4} = 0 a_{5} = \frac{-2}{5\pi} a_{6} = 0 b_{1} = 0 b_{2} = \frac{-2}{\pi} b_{3} = 0 b_{4} = 0 b_{5} = 0 b_{6} =\frac{-2}{3\pi} b_{7} = 0 b_{8} = 0...

Homework Statement I'm trying to find a Fourier series for the piecewise function where f(x)= 0 \in -\pi \leq x \leq 0 -1 \in 0 \leq x \leq \frac{\pi}{2} 1 \in \frac{\pi}{2} \leq x \leq \pi Homework Equations a_{n} = \frac{1}{\pi} \int_{0}^{2\pi}\cos(nx)y(x)\,dx b_{n} = \frac{1}{\pi}...

Ah right good catch. I tried that and got 3.3*10^8 T, but that was wrong too. i did E = \frac{hc}{\lambda} where \lambda is .065 nm than divided by \mu_B

Homework Statement The magnetic field in a Stern-Gerlach experiment varies along the vertical direction so that the magnetic field increases by 26.00 T each centimeter. The horizontal length of the magnet is 7.1 cm, and the speed of the silver atoms is 922 m/s. The mass of the silver atom is...