algy Posted January 8, 2011 Report Share Posted January 8, 2011 The speed of light = 186,282 miles/second, what is the speed of dark? Quote Link to comment Share on other sites More sharing options...
Dizzy Posted January 8, 2011 Report Share Posted January 8, 2011 slower as it's thicker... that's why you can't see through it as easy Quote Link to comment Share on other sites More sharing options...
wolfie Posted January 9, 2011 Report Share Posted January 9, 2011 A book by Ian Duhig. Quote Link to comment Share on other sites More sharing options...
observer Posted January 9, 2011 Report Share Posted January 9, 2011 Not a prob, if you eat your carrots though! Quote Link to comment Share on other sites More sharing options...
Mary Posted January 9, 2011 Report Share Posted January 9, 2011 Quote Link to comment Share on other sites More sharing options...
algy Posted January 9, 2011 Author Report Share Posted January 9, 2011 In both instances is it slower if it's foggy? Quote Link to comment Share on other sites More sharing options...
Wingnut Posted January 9, 2011 Report Share Posted January 9, 2011 iPad says No. Quote Link to comment Share on other sites More sharing options...
algy Posted January 9, 2011 Author Report Share Posted January 9, 2011 Did you know that that iPad is short for iPaddy and heres the latest model. Quote Link to comment Share on other sites More sharing options...
Lt Kije Posted January 9, 2011 Report Share Posted January 9, 2011 Quote Link to comment Share on other sites More sharing options...
Sue Durnim Posted January 9, 2011 Report Share Posted January 9, 2011 OK....What is the average speed of rain fall? Quote Link to comment Share on other sites More sharing options...
wolfie Posted January 9, 2011 Report Share Posted January 9, 2011 Depends if it's raining cats or dogs. Quote Link to comment Share on other sites More sharing options...
algy Posted January 9, 2011 Author Report Share Posted January 9, 2011 OK....What is the average speed of rain fall? Too many variables Sue, wind speed, temperature, atmospheric pressure, size of droplets, viscosity of droplets, etc. However here is the nearest you will get:- The terminal velocity of a falling raindrop through still air depends on its size. An average raindrop is about 2 millimeters in diameter and has a maximum fall rate of about 14.5 miles per hour or 21 feet per second. A large raindrop, 5 mm in diameter, falls at 20 mph (29 feet/second), but drops of this size tend to fall apart into smaller drops. Drizzle, which has a diameter of 0.5 mm, has a fall rate of 4.5 mph (7 feet/second). Read more: How fast does the average rain drop fall in mph? | Answerbag http://www.answerbag.com/q_view/37946#ixzz1Aa7vS2X5 Quote Link to comment Share on other sites More sharing options...
Dizzy Posted January 9, 2011 Report Share Posted January 9, 2011 Do you believe that one SD Quote Link to comment Share on other sites More sharing options...
Sue Durnim Posted January 10, 2011 Report Share Posted January 10, 2011 Thanks algy and Dizzy, I do believe it Quote Link to comment Share on other sites More sharing options...
observer Posted January 10, 2011 Report Share Posted January 10, 2011 Does this help if you havn't got a brolly? Quote Link to comment Share on other sites More sharing options...
Wingnut Posted January 10, 2011 Report Share Posted January 10, 2011 I have heard it said that a raindrop bounces approx 9" when it hits the floor. This determines the height of your damp proof course in the outside wall, usuallly three brick widths up from the level of the flags. Quote Link to comment Share on other sites More sharing options...
observer Posted January 10, 2011 Report Share Posted January 10, 2011 But is the angle of the bounce towards or away from the wall? Quote Link to comment Share on other sites More sharing options...
algy Posted January 10, 2011 Author Report Share Posted January 10, 2011 I would imagine that depends on the angle of the trajectory of the rain drop in relation to where the wall is situated. Quote Link to comment Share on other sites More sharing options...
wolfie Posted January 10, 2011 Report Share Posted January 10, 2011 I have heard it said that a raindrop bounces approx 9" when it hits the floor. This determines the height of your damp proof course in the outside wall, usuallly three brick widths up from the level of the flags. So what about the raindrops hitting the wall 27 bricks up. Quote Link to comment Share on other sites More sharing options...
Peter T Posted January 10, 2011 Report Share Posted January 10, 2011 Mine tend to hit the roof. Quote Link to comment Share on other sites More sharing options...
Dizzy Posted January 10, 2011 Report Share Posted January 10, 2011 I tend to do that too from time to time Quote Link to comment Share on other sites More sharing options...
Wingnut Posted January 10, 2011 Report Share Posted January 10, 2011 That is what always puzzled me Wolfie. Going back to the 70's - 80's. It was then two brick widths up from the ground i.e 6" where the damp course was placed. And that came from a Clerk of Works. I'm sure there must be a reason for it, but I doubt if that was it. Never have been able to get me head around that one. The same as digging a footing out. Dig down for 3' or until you reach clay. Quote Link to comment Share on other sites More sharing options...
observer Posted January 10, 2011 Report Share Posted January 10, 2011 Arn't damp courses intended to stop damp rising? Quote Link to comment Share on other sites More sharing options...
Wingnut Posted January 11, 2011 Report Share Posted January 11, 2011 Yes it is supposd to stop rising damp Obs. But the terraced houses along Manchester Road don't have any damp course what so ever. That's how they were built. And they don't have rising damp. There has been a trane of thought for some years now, that there is no such thing as rising dmp. Quote Link to comment Share on other sites More sharing options...
Evil Sid Posted January 11, 2011 Report Share Posted January 11, 2011 yes there is i was watching on the telly last week. that rigsby is so funny Quote Link to comment Share on other sites More sharing options...
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