Recent content by nikstar

Thanks Hydrogen1 and Dick. It makes a little more sense - so you are just looking at the speed apparent to the observer, so in part (d) even though the truck is traveling at 20m/s and you are traveling at 30m/s you only take into account your 30m/s? What a very strange question...

Nope. None of those solutions really help. The solution states that the apparent speed of sound changes when the object moves. Hikaru - if you note the answers for (c) and (d) are 346 and 376 - so your solution of 346 for both has got me perplexed. I know what happens when the source and...

It would appear that the source doesn't matter... but it should, shouldn't it? I was just thinking that with the Doppler effect it is both the source and the object that matter... i.e. Frequency changes if either the source moves or you move, so I just thought it would be similar with the speed...

I have Honors in Physics and am a qualified teacher, but I've taken 4 yrs out to have kids. I'm trying to get back into it by starting with tutoring, and I am totally perplexed by this solution to the question, so think there is a fault with it. The book is a new edition so it is possible. I'm...