If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#10
|
|||
|
|||
On or about Mon, 19 Jan 2004 09:28:37 +0000, Alan Lothian
allegedly uttered: In article , Keith Willshaw wrote: Hmmm, I suspect when dealing with a kg of water it makes a big difference to the fan blades if that water is frozen in a single lump. Indeed. Strange to relate, more windscreens are smashed by hailstones than by raindrops. Hailstones can get rather larger than raindrops. In the various updrafts within stormclouds the raindrops grow until they reach a size at which they're too unstable in the airflows and fission into smaller drops, hail just keeps growing until the updrafts can't keep them up. I've never been hurt by rainfall, but one short shower of 1" hail left me very battered, slightly dazed, and in need of a large drink and a quiet lie down. I'd be interested to know what experiments, if any, the programme did in order to reach its conclusions. Obviously they are quite correct about kinetic energy and momentum, but transfer of momentum operates in many different ways depending very much on the nature of the materials in which the transfer occurs. I have to admit I missed the show and will keep an eye out for the inevitable rerun as it would be one I'd like to see. --- Peter Kemp Life is short - Drink Faster |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
chicken thief | Del Rawlins | Home Built | 3 | April 3rd 04 03:20 AM |
Britain Reveals Secret Weapon - Chicken Powered Nuclear Bomb ! | Ian | Military Aviation | 0 | April 2nd 04 03:18 PM |
WWII 20mm cannon in planes | zxcv | Military Aviation | 13 | March 10th 04 10:52 AM |
Future military fighters and guns - yes or no ? | championsleeper | Military Aviation | 77 | March 3rd 04 04:11 AM |
Development of British cannon ammuniation during WW2 | Jukka O. Kauppinen | Military Aviation | 14 | December 29th 03 09:25 AM |