Lightning 5 Second Rule

This technique is known as the flash-to-bang method. Count the seconds between seeing lightning and hearing thunder.

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Sound travels about one mile every five seconds so if you see some lightning and start counting seconds then hear thunder you can estimate how many miles away the lightning struck by dividing the number of seconds by five.

Lightning 5 second rule. Since lightning travels at approximately the speed of light 186000 miles per second you see it almost instantly. 10 seconds after a flash. Five seconds for example indicates the lightning struck 1 mile away and a 10-second gap means the lightning was 2 miles away.

Count the seconds between seeing lightning and hearing thunder. If this time is less than 30 seconds lightning is a threat. How far does it travel in 5 seconds.

So since the flash reaches our eyes instantly if we count the number of seconds between the flash and when we hear the thunder we can approximate the distance to the lightning. 5 seconds 1 mile 15 seconds 3 miles 0 seconds very close. Since a count of five seconds equals a distance of one mile a count of thirty seconds equals a distance of six miles.

So the 5 sec Zs is higher then 04 values lower the value higher PSC Faster disconnection In a street lighting circuit you can use HRC fuses for a 5 sec disconnection time. Stay in a safe area until you are sure. The 30-30 Rule is an easy way to determine the threat of lightning in your area.

So 1 second less than a mile a fifth of a mile 5 seconds 1 mile 20 seconds 4 miles etc. The lightning is. If you count the number of seconds between the flash of lightning and the sound of thunder and then divide by 5 youll get the distance in miles to the lightning.

For example if the lightning struck for about 5 seconds divide 1087 by 5 to calculate the distance. 5500 feet which is just a little over a mile 1 mile 5280 feet. These different rates of travel allow you to estimate the distance between yourself and the lightning.

Thus youll get that the lightning struck around 217 feet away. If you see a flash and instantly hear the thunder the lightning stroke was very close. The five second rule allows you to determine how far away a lightning strike or pretty much any event that you can both see and hear is.

When you see the thunder strike count the time in seconds for which it lasts. 25 seconds after a flash. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How.

So for every 5 seconds you count before you hear thunder that equals 1. Lightning in your area. It can keep you safe from lightning strikes during rainy summer weather.

If you relate the disconnection time to the time current curves in appendix 3 that will show that on a 5 sec disconnection time you are allowed highter Zs values. Therefore if you want to find out how far you are from lightning divide the number of seconds by 5 if you want the answer in miles and divide it by 3 if you want the answer in kilometers. How big can lightning.

The thunder travels away from the lightning bolt and in about 5 seconds it will have traveled 1 mile. 20 seconds after a flash. Five 5 seconds approximates one 1 mile of distance.

Keep in mind that you should be in a safe place while counting. You can tell how far away a lightning stroke is by counting the seconds between seeing the lightning flash and hearing the thunder. 15 seconds after a flash.

In most cases when you can hear thunder you are no longer safe. Rhett and Link test out the 5 Second Rule game and their answers are LOL-worthy. As you know the speed of sound is approximately 1087 feet per second.

If this time is less than 30 seconds lightning is still a potential threat. After a lightning ﬂash wait 30 minutes before leaving shelter. Thunder on the other hand travels at the speed of sound about one mile in five seconds at the Earths surface.

For every 5 seconds between the lightning flash and the sound of thunder the thunderstorm that produced the lightning is 1 mile away. 30 seconds after a flash. Half of all lightning deaths occur after a storm passes.

The delay between when you see lightning and when you hear thunder occurs because sound travels much more slowly than light. 5 seconds after a flash.

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