Recent content by fattydq

http://soundcloud.com/bedhead-1

Anyone? I just uploaded a few new tracks, check em out! : )

ttp://soundcloud.com/bedhead-1/sets/ambient/ Check out some of my new tracks and let me know what you think! : )

Pure tones with frequencies 440Hz and 448Hz are sounded together. What is heard? (Describe pitch of the fused tone and frequency of beats.) I'm very confused with the way my book explains this, it says that we will hear audible beats at the difference frequency, which in this case would be 8 Hz...

I'm sorry could you clarify what you mean

I'm asked to calculate the potential energy of a 1 liter bottle with a pressure 10^4N/m^2 above atmospheric pressure. I can't seem to find any formula in my book, or even through searching google extensively, that uses pressure and volume to calculate potential energy. Any ideas?

So I just divide the numerical answer for kinetic energy by 20?

Well the reason I thought I needed a distance was because the formula for power is the change in work over the change in time. SOOOO the formula for work is force times DISTANCE. So I don't understand how can I calculate power if I can't find work.

So here's my homework problem: Calculate KE of a 1500 kg vehicle moving at 30 m/2. Which I did, and got 675000 joules, using the standard KE formula. But then it asks, if the vehicle accelerated to this speed in 20 seconds, what average power was developed? Any formula for power...

mmm, good point I guess the only real difference is that the shape of your mouth, tongue, teeth, etcetera, is part of what makes words as opposed to just ambiguous tones or pitches, so how does that translate across a vibrating string? Do all these things I just mentioned effect the actual...

Hi, I'm just wondering what the physics are behind why a tin can phone works (two cans connected by a string, one speaks into one can, and the other can hear it in the can on the other end.) Is it simply that when one person talks into his/her cup, the bottom of the cup vibrates back and...

Oh right, haha. So would it just be 2*alpha or is this a trick question?

String is wrapped around the outer rim of a solid uniform cylinder that is free to rotate about a frictionless axle through its center. When the string is pulled with a force P tangent to the rim it gives the cylinder an angular acceleration alpha. If the cylinder had twice the radius, but...

What proper "physics terminology" could I use to explain this?

A ball of mass 0.18 kg is whirled in a horizontal circle at the end of a massless string 75 cm long at a speed of 4.5 m/s. If the string is lengthened to 1.5 m while the ball is being twirled, then the speed of the ball will now be... What law or formula applies to this question?