Recent content by tjaeger

So, I've been trying to solve a variation of the famous birthday problem. The problem is a more generalized version and goes like this: given n people, what is the probability at least k people share a birthday? You could also describe the problem as such: given m items randomly distributed into...

Exception in thread "main" java.lang.NoClassDefFoundError: I was getting this error trying to compile some java programs in SSH Secure Shell. Then I made a simple "Hello World" program in my home directory to see if it would compile by typing 'java HelloWorld' but all I got was: Caused by...

I think we are supposed to look at each case individually. The answer is given to be the 958Hz wave.

Homework Statement A car with a 1000Hz siren moves away from you toward a cliff at 15m/s. You are stationary. What frequency of sound do you hear directly from the wall and what frequency do you hear reflected off the wall? Which sound is louder? Homework Equations f' = f(v +/- vo)/(v...

Nevermind, I figured it out. Wavelength changes with a moving source and velocity of the sound wrt the observer changes when the observer is moving.

Homework Statement I have a problem that asks to derive the doppler effect for the two different cases of a moving observer and a moving source. Homework Equations I should get f' = f*(v +/- vo)/(v +/- vs) as my general equation, where f' is the observed frequency and f is the...

ok, thanks. I got it now.

Studying for finals and I don't recall how to do projection and I don't like the explanation my textbook gives Problem: Find the distance from the point (1,3,-2) to the plane 2x + y - z = 1 The answer to this problem should be sqrt(6) Relevant equations: ? The attempt at a solution...