Recent content by Nymn

I'm stuck on a homework problem. It states the wavelength is 600 nm and the glass lens has an index of refraction of 1.40. Find the index of refraction for the coating and the required thickness. I've googled around, but I'm not sure what equations I should be using. I got 1.183 for the...

Oh, okay. That's what I was wondering. Someone told me that one of the objects would have to vibrate for there to be sound, but I figured the air alone would do it. A thought, is this how things like lightning make sound?

I don't know. I thought sound was the result of potential energy being released as kinetic energy (I don't know much about this, bear with my ignorance :| ). So one of the metal objects would have to vibrate for there to be sound?

If two metal objects hit, do the objects have to vibrate to make a sound? Or can the air itself vibrate with the sound?

I'm trying to figure out the answer to a homework problem, but I just don't know the formula. :| I was going to explain it, but I figure a pic is easier. http://img230.imageshack.us/img230/15/el1ko7.th.jpg Now, I think you start with T = RC? With that, I get 1 sec. Then I divide each...

Nice! Reminds me of this place I've been to called Bash Bish Falls. Beautiful scenery up there.

Maybe my teacher is checking to see if we're paying attention. :P

Yah, that's pretty much how it's written. Here's the exact question: A 60 Watt incandescent bulb has a "hot" resistance of 240 ohms when connected to a 120 VACrms source. How much power is the light bulb using? So...the answer is 60 Watts, then? Is it a trick question? o_O

Sorry if this is the wrong forum, it's a homework question I'm stuck on, though. :| The question is that if a 60 Watt bulb has a hot resistance of 240 ohms when it's connected to a 120 VAC source, how much power is the bulb using? Now I'm not exactly sure what equation to use, I thought it...