How fast does sound travel in a mile?
At 20 °C (68 °F), the speed of sound in air is about 343 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s.
What is the 30 30 rule for lightning?
The 30-30 Rule is an easy way to determine the threat of lightning in your area: 30 Seconds: Count the seconds between seeing lightning and hearing thunder. If this time is less than 30 seconds, lightning is a threat. Seek shelter immediately.
How far away can you hear thunder?
Thunder can be heard up to 25 miles away, and lightning strikes have been documented to occur as far as 25 miles from thunderstorms – known as a “bolt from the blue.” So if you can hear thunder, you’re close enough to be hit by lightning, and sheltering indoors or in an enclosed car is your safest bet.
How far does sound travel in 13 seconds?
In air at a temperature of 70° F (22.2° C), sound travels at a speed of about 1,129 feet (344 meters) per second, which is roughly equivalent to one-fifth of a mile in one second, or one mile in five seconds (or one kilometer in about three seconds).
What is the fastest thing in the world?
The Fast Animal in SkyClocking speeds of up to 325 km/h, The Peregrine falcon is the fastest animal in the sky.
Whats the fastest thing in the universe?
Within the universe, light is the fastest things, light as no mass, things with no mass could reach light speed. A shadow is the next thing, which can travel faster than light.
Is it safe to be in a tent during a thunderstorm?
Unfortunately, tent safety during a thunderstorm in the backcountry can be extremely challenging. If the tent stands higher than nearby objects or is under a tree, you could be at an increased risk of being struck by lightning or suffering exposure to sideflash or ground current—all which can be deadly.
Is it safe to watch TV during thunderstorm?
It isn’t dangerous to watch TV during a thunderstorm, but the electronics in a TV set are vulnerable. If you have to make a telephone call, use a mobile phone detached from its cable rather than a landline device. Over-voltages resulting from a lightning strike may follow electrical conductors into the handset.
Can you shower during thunderstorms?
Is it safe to take a shower or bath during a lightning storm? Lightning can travel through plumbing. It is best to avoid all water during a lightning storm. Do not shower, bathe, wash dishes, or wash your hands.