tag:blogger.com,1999:blog-2026462173127234532.post8563338207941907966..comments2024-03-13T05:24:54.761-05:00Comments on DIY Laser: Are you well connected?Tim Wehrhttp://www.blogger.com/profile/05579550070576755514noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-2026462173127234532.post-30603845798785081012011-09-25T09:21:28.218-05:002011-09-25T09:21:28.218-05:00Just copied this from another forum with guys heat...Just copied this from another forum with guys heating up their coffee with a 2K watt laser :-)<br /><br />okay,<br />so every cup is lit for, like 19 seconds..<br />2,5 kW = 2500 Watts.<br />1 Joule = 1 Watt * 1 Second.<br />so there’s 2500W * 19S = 47,5 kJ thrown into that cup.<br /><br />for 1 liter of water, you need 4,2 Kj to heat it up by one degree Celsius.<br /><br />so say there’s 100 ml water in that cup, that’s 0,1 L.<br /><br />so you need 0,42 KJ to heat it 1°<br />0,42 / 47,5 = 113°C<br />if the cup was at room temperature, the coffee would become 135°C.MonoNeuronhttps://www.blogger.com/profile/09572985257020349901noreply@blogger.com