Recent content by jamcintyre1

1. Homework Statement You are standing on side of road and ambulance drives by. Smallest distance between you and ambulance is 4m. Ambulance v=10m/s^2. You have 2.2 GHz radar. Ambulance travels 100m with center of straight line directly across from you. Compute exact doppler shift by taking...

How do I calculate radar cross section given the diameter of a spherical object and the radar's frequency in GHz? Thanks

The main reason to use these is to give a shortcut for derivatives of variations of e functions. There is no need to learn these until calc and not. even necessaru for calc since you can always do it out instead of wrote memorization.

If you have a good calc or program, do line of best fit. It is not linear. It very well may be trigonometric due to the alternating signs. There are ways to do it for EXPO and poly but Trig ones are hard by hand.

I didn't get any more info. the solution has a sin graph I think with the 2nd antinode as the 2nd max which mazes sense, so 1.5*wavelength/2. But I can't figure out why the equation won't work. Thanks for your help btw. I'll take a look at you question.

Homework Statement The 4th node of a standing wave occurs at a position of 4.10 meters. Where is the 2nd antinode? Homework Equations nodes occur at: x=n*(λ/2) antinodes: x=(n+.5)*(λ/2) The Attempt at a Solution n=4?? 4.1m=2λ→λ=2.05m now n=2? x=(2+.5)*(λ/2)≈2.56m wrong! x=1.54m