Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
100 Watts/(meter Kelvin) * (300-80)Kelvin/0.005meter * 15meter * (1.8meter) * 2pi
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random