Recent content by Elizabeth

Okay... here it is! Here's an attachment then! What do you think? Sorry, I wasn't sure how to embed into the reply. :smile: Elizabeth

Thanks for the reply! That would make it 2m. High to Medium = 0.5 Medium to Low = 0.5 Low to Medium = 0.5 Medium to High = 0.5 That doesn't make much sense to me, it's the same as one of the numbers given in the question, and it's a pretty long wave length to boot! PLUS, the...

? Thanks for the reply, and thanks for the suggestion. I tried to think of a "plain" sinusoidal wave, with the high pressure as the peak, the medium as axis x across it, and the low, and the lowest peak. I'm thinking that the high peak is 2.5m, and that 2 is the medium(?), then the lowest...

I'm not a maths expert, but you're logic seems to make sense, even though the answer is quite small. I worked it out in a similar way to you: energy transferred or total units (Kw/h) = power (kw) x time (h). Then total cost = number of units x cost per unit. Perhaps, 40W is not a lot...

This is my first posting ever :smile: ! I hope someone can point me in the right direction. Please also note, that I'm on a Music Technology course, but there are quite a lot of physics/maths! Presenting Problem The air pressure is found to be normal atmospheric pressure 2 metres from a...