fall assingle drops?
· What is the shape and size of raindrops?
· Why does rain not heatup due to friction force and fall in the form
of boiling water?
Every year, approximately 45 million cubic meters of water vaporize
from the oceans. The vaporized water is turned into cloudsand moved to
the land viawinds. So every year between three and four cubic meters
of water moves from the oceans to the lands, meaning where we live.
Water, which people cannot control the circulation of and cannot live
without it, is sent specially. Also there are many wonders about the
formation of water and itsfall onto the ground. In the Qur'an, Allah
reveals the erudite characteristics of the rain, which is one ofthe
clearest signs that a person should be "thankful", as such:
" Have you thought about the water that youdrink? Is it you who sent
it down from the clouds or are We the Sender? If We wished We could
have made it bitter,so will you not give thanks? " (Surat al-Waqi'a ,
68-70)
It is Allah's Mercy That Rain Falls Drop by Drop From the Clouds
One of the wonders Allah created in rain is that rain does not fall
onto the ground in the form of a large water mass like waterfalls. If
rain fell on the ground in this form, it would not be possible for
people to continue their daily lives during rainy seasons and floods
would form during every rainfall. These floods would drag away
everything in front of them and cause serious damage, both material
and spiritual. However, due to the laws of physics created by our
Almighty Lord, it falls on the groundin drops and by decreasingits
speed turns into the precious water that is the source of life for
all beings.
The reason that rain falls in drops is that water droplets are formed
insideclouds. As is known, a cloud is formed by water vapor being
thickened with dust and electrically positive charged particles. The
diameter of these particles are generally between one and ten microns.
(1 micron = 0.001millimeters.) When clouds move upwards at a
certainspeed (1-10 meters/sec), they take water droplets with them
naturally. As the water droplets rise up,they get bigger as their
volume increases. Two or more droplets unite and form a rain drop. The
air can no longer carry these drops and the rain drops begin to fall
to the ground.
Since big drops fall faster than small drops until they reach a fixed
speed, big drops and small drops crash and unite. Drops, which get
bigger through crashing and uniting, encounter air resistance which
distorts the shape of the water drop, spreadsand turns into many small
droplets in a short time, something on the order of six hundreths of
a second. Since the speeds of drops of the same size are the same, and
they move in the same direction, they do not crash with one another.
Raindrops Slow Down When Falling On the Ground by Our Lord's Inspiration
One of the wonders our Almighty Lord created in raindrops is certainly
the falling speed of rain. Whenan object of the same size and weight
as a raindrop is left from a height of 1,200 meters, it would
getfaster gradually and fall onthe ground with a speed of almost 558
kilometers per hour. If the raindrop would fall from this heightin the
same way, this timeall crops would be destroyed, places of settlement,
houses and cars would be damaged and people would not be able to walk
without taking necessary precautions. However, such an incident never
occurs; no matter how high a distance raindrops fall from, when they
reach the ground their speeds are only eight to ten kilometers per
hour. The reason for this is that the raindrop has a shape that
increases the frictional force of the atmosphere and makes it fall
slower. If the raindrop had another shape, or if the atmosphere had no
friction force, it would be enough to take a look at these numbers to
see the disasters the world would face every time it rained.
The minimum height of rain clouds is 1,200 meters. The effect of a
single drop that falls from this height is equal to the fall of a one
kilogram weight from a height of 15 centimeters.
There are also rain cloudsup to 10,000 meters high. This time a single
drop would have the same effect of a one kilogram weight falling from
110 centimeters high and thus people would need to take shelter by
taking major precautions.
As it is seen, Allah defines the falling speed of rain and makes rain
beneficial for all beings:
" And We sent down blessed water from the sky and made gardens grow
by it and grain for harvesting " (Surah Qaf, 9)
Rain Not Being Hot is Allah's Mercy Over His Servants/
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