Unexplained bright flash of light inside house - Physics Forums
Dec 31, 2022 · The first flash was so bright it immediately woke me up. I thought somebody just shined a bright flash light in my face from inches away. The second flash 5 seconds later, I …
What caused the mysterious flash of light during 9/11 plane strikes?
Mar 13, 2006 · Tapes of the planes hitting the WTC towers clearly show a flash of light just as the nose of the plane touches the side of the building. Four views of the second strike, and the …
How to calculate flash point of mixture? • Physics Forums
Jun 7, 2012 · Hey guys, I would like to create a mixture out of two liquids with an ideal flash point of around 70ºF. The liquids I have to work with are 200 proof (100%) isopropyl alcohol (2 …
Flash Point of Petrol & Diesel: Pressure & Self Ignition
Aug 13, 2018 · The discussion focuses on the differences in flash points, boiling points, and self-ignition temperatures of petrol and diesel under varying pressures. Petrol has a lower flash …
How Does a Grenade's Shockwave Cause Fatal Injuries?
Oct 6, 2008 · Stun grenades, or "flash bang" grenades, operate on this principle. They produce a large blast but almost no shrapnel. The noise and brightness of the flash are very disorienting, …
Camera Flash Circuit Explanation - Physics Forums
Jul 22, 2012 · These two websites: http://www.increa.com/reverse/dc/ and http://thesignalpath.com/blogs/2011/06/12/camera-flash-circuit-and-nixie-tube-tutorial/...
Why N-Butane & Isobutane Have Different Autoignition & Flash …
Aug 22, 2012 · The autoignition temp of n-butane (straight chain) is 288 degree Celcius while that of isobutane (branched chain) is 460 degree Celcius. The flash point of...
Why do Lifesavers no longer produce a blue flash, but Altoids still …
Nov 26, 2020 · Wintergreen Lifesavers no longer produce a blue flash when crushed, a phenomenon known as triboluminescence, which is still observed in Wintergreen Altoids. The …
How many electrons are involved in a lightning flash
Aug 28, 2005 · A typical lightning flash delivers about 35 C of negative charge from cloud to ground. How many electrons are involved? Im not extactly sure how to...
Formatting a new flash drive? - calguns.net
Oct 21, 2025 · I got a new flash drive for backing up. It's pretty ggod sized (500 gigs), tje ones I've been usimg arebetween 32 and 256 gigs. They're all "thumb" drives, whereas this …