Date post: | 19-Dec-2015 |
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Shape of Raindrops
Do you think the shape of raindrops
like teardrops? Click one of buttons
YesYes NoNo
Oh Dear!
It is incorrec
t !
NEXTNEXT
Please click the
NEXT button to see the reason.
Do you think the shape of rain likes the tear? Pls click one of
buttons
Congratulations! Answer is
correct!
Pls click the NEXT button to see the real shape of rain dr
op
NEXTNEXT
According to the study by Philipp Lenard in 1898,
the small raindrops (< 2 mm diameter)
are approximately
spherical.
During falling, rain drops take on shapes with flattened bases and rounded
tops. Thus, they like falling
hamburger buns than teardrops.
When raindrops are falling, they crashes other
raindrops.
Hence, the collision causes
distortions in the drops' shapes.
Also, it causes drops to merge, and then form a larger
drop.
Do you think the drops can keep
the shape of larger
hamburger buns during falling?
Do you think the drops can keep
the shape of larger
hamburger buns during falling? Please click the correct button.
YesYes NoNo
Ha! Ha!It is incorrect!
NEXTNEXT
Pls click NEXTbutton to find out the
truth.
Good Job!
Do you know what shapeof larger raindrops change
during falling? Clickthe NEXT button to see
the result.
NEXTNEXT
If size of drop is less than 5mm, the drop can
keep the shape like hamburger
bun.
If size of drop is greaterthan 5mm, the force of air
breaks the surface tension of drop.
Thus, the drop is broken into the smaller drops like
hamburger bun again!
Such phenomenon continues until the drop has fallen
on the ground.
Web Site For Details Of Shape Of Raindrops
1. http://www.suite101.com/article.cfm/science_sky/91232
2. http://www.ems.psu.edu/~fraser/Bad/BadRain.html
3. http://weather.about.com/od/cloudsandprecipitation/a/rainburgers.
htm
4. http://en.wikipedia.org/wiki/Rain_drop
5. http://www.shorstmeyer.com/wxfaqs/float/float.htmlYou can click the above website address
to see the details of shape of rain drop, or click END button to finish this lesson.
ENDEND