Recent content by Shiina-kun

Homework Statement The Doppler shift was first tested in 1845 by the French scientist B. Ballot. He had a trumpet player sound an A 440 Hz while riding on a flatcar pulled by a locomotive. At the same time, a stationary trumpeter played the same note. Ballot heard 3.0 beats per second. How...

Oh! I get it now! Thank you! ^^

er... one more question... would I add 25 to 50? r=50, which equals the difference between the two distances, right?

Thank you so much for your help! So... let me see if I understand this... Instead of solving for P, you get the difference between the decibels and solve for r using the first distance given (R=5). Is that right?

[SOLVED] Sound Intensity Please help! Homework Statement The sound intensity level 5.0m from a point source is 95 dB. At what distance will it be 75 dB? Homework Equations dB = 10log(I/Io) I = P/4*pi*r^2 The Attempt at a Solution I honestly don't know what to do with this...

Vibrations and Waves - please help! I'm having trouble with my physics homework. I can't seem to figure out which formula to use to solve a particular problem. "If a particle undergoes SHM with amplitude 0.25m, what is the total distance it travels in one period?" The formulas I have that...