How Far Does Rain Fall?
If the base of the cloud from which they are falling is at 2 000 feet above your head it takes those drops 1.1 minutes to reach the ground. An average raindrop falls at about 14 mph and will reach the ground in 1.6 minutes. Smaller drops go slower and will reach the ground in up to seven minutes.Jul 17 2015
What altitude does rain fall from?
How big is the average rain drop?
How much rain falls in a day?
number? The average global rainfall is a little over two millimeters (. 08 inches) per day.
How hard does rain hit the ground?
In still air the terminal speed of a raindrop is an increasing function of the size of the drop reaching a maximum of about 10 meters per second (20 knots) for the largest drops. To reach the ground from say 4000 meters up such a raindrop will take at least 400 seconds or about seven minutes.
Why do clouds turn GREY before it rains?
It is the thickness or height of clouds that makes them look gray. … The tiny water droplets and ice crystals in clouds are just the right size to scatter all colors of light compared with the smaller molecules of air that scatter blue light most effectively. When light contains all colors we perceive it as white.
When was the first rain on Earth?
About 232 million years ago during a span known as the Carnian age it rained almost everywhere. After millions of years of dry climates Earth entered a wet period lasting one million to two million years. Nearly any place where geologists find rocks of that age there are signs of wet weather.
At what speed does a raindrop fall?
When all the parameters are considered the terminal velocity of a typical raindrop is calculated to be about 9 meters per second or 20 mph. A smaller raindrop of radius 0.15 cm has a terminal velocity of about 7 meters per second or 16 mph.
What is the largest raindrop ever recorded?
How many raindrops fall in a storm?
Once square mile is 4014489600 square inches so we end up with 4014489600 cubic inches of rain or 17378700 gallons (which is a lot!). There are 90 921 drops of water in one gallon so multiplying all together… Roughly 1 580 088 782 700 drops of water will fall. Or about 1 1/2 trillion drops.
Does it rain on Earth every day?
Yes. Thanks to the Earth’s water cycle it is always raining in some part of the world every day. Rain is a form of precipitation much like snow. As the precipitation falls from the atmosphere the Earth collects it in soil plants and bodies of water.
What if it rained every day for a year?
How much rain falls on Earth every second?
That works out to about 1 430 cubic miles of water and a weight (at about 62.4 pounds per cubic foot) of about 6.6 billion tons – an average of more than 2 tons of rain per second.
How long would it take a large raindrop to hit the ground if it were falling from a cloud that was 2000 meters above the ground?
The largest raindrops those associated with thunderstorms are 0.2 inches in diameter and they fall at about 20 mph. If the base of the cloud from which they are falling is at 2 000 feet above your head it takes those drops 1.1 minutes to reach the ground.
Why does rain not hurt when falling?
When you drop something in air it does not accelerate forever. … This is known as air resistance or drag. As the object gains velocity there comes a time when the force of the air resistance is enough to balance the force of gravity so the acceleration stops and the raindrop attains terminal velocity.
How many raindrops are in a cloud?
Problem 3 – To the nearest 1000 about how many large cloud droplets have to combine to form one typical raindrop? Answer: N = Mass of raindrop/mass of large droplet = 0.004 grams/5.2×10-7 grams = 7692 or about 8000 large droplets.
Why are clouds white 10?
Clouds appear white because of scattering. The droplets in clouds are big compared to the wavelength of light so all wavelengths scatter the same. … These are much tinier than the wavelength of light so blue light scatters much more than red.
Why is the sky blue?
As white light passes through our atmosphere tiny air molecules cause it to ‘scatter’. The scattering caused by these tiny air molecules (known as Rayleigh scattering) increases as the wavelength of light decreases. … Therefore blue light is scattered more than red light and the sky appears blue during the day.
Why do clouds turn pink?
Why does it rain for 2 million years?
While burning coal and sulfur caused high temperatures and the extinction of species before the Triassic the real culprit behind the two million-year rain were volcanic eruptions. … After the volcanic activity the Earth was so humid that layers of clouds were pushed from the coastal areas to inland areas.
Which country gets the most rain?
|Rank||Country||Average precipitation (mm in depth per year)|
|2||São Tomé and Príncipe||3 200|
|3||Papua New Guinea||3 142|
|4||Solomon Islands||3 028|
What was the Earth like 3 million years ago?
Do all the rain drops reach the Earth with the same speed?
It is impossible in such a framework to have drops of vastly different sizes moving at the same speed. However large drops eventually break up either because they become hydrodynamically unstable or as a result of temporary coalescence produced after a collision [Pruppacher and Klett 1997].
How many raindrops hit the ground per second?
Thus 90 raindrops fall on this square per second. When a raindrop falls it is equally likely to fall anywhere on the square. second?
Why do raindrops move downwards?
Gravity pulls everything downward. As an object falls it experiences a frictional drag that counters the downward force of gravity. … As the raindrops fall they are flattened and shaped like a hamburger bun by the drag forces of the air they are falling through..
Why don t raindrops get arbitrarily large?
So why can’t raindrops grow to arbitrarily large sizes? … Ultimately the water drop will become large enough to fall to earth. When this happens the surface tension of the water that keeps the drop more or less spherical is partially overcome by the airflow pressure on its lower surface as it falls.
Why do raindrops get bigger as they fall?
The raindrop will continue falling until it reaches the ground. As it falls sometimes a gust of wind (updraft) will force the drop back up into the cloud where it continues eating other droplets and getting bigger.
How big is a raindrop when it leaves a cloud?
Raindrops can come in many sizes but nothing comes in “all” sizes. Basically the size range for falling-out-of-a-cloud raindrops is between 5 millimeters (mm) and 1/2 mm. Five millimeters is about a quarter of an inch 1/2 mm or 0.5 millimeter is 1/25th of an inch.
Is 1 inch of rain a lot?
One (1.00) inch of rain – A light moderate rain never reaches this amount heavy rain for several hours (2-5 hours). There would be deep standing water for long periods of time.
How many droplets are in rain?
It takes about one million cloud droplets to deliver a single raindrop. If the relative humidity is high enough those droplets could grow to a full-size drop.
How does rain form and what is the water cycle?
The Water Cycle | The Dr. Binocs Show | Learn Videos For Kids