Welcome to Panachallenge!
If you are already a member, Click Here to Log In.

 
     
t t rss cal
    Home   ·   Rules   ·   Mugshots   ·   Challenges   ·   Stats   ·   Forums   ·   Help Register    

  #208 Energy
Entry 1 of 20
   
 
TWISTER!!!       ©2018 A.N.Other
Panasonic DMC-TZ30       1st place, 159 points
1/59s, f3.3, ISO 100, 24mm, Normal Program, Pattern, flash
 
Post-Processing: Cropped,
Inverted,
Liquify tool,
Dodge and burn,
Clone tool,
Spot removal tool,
Noise reduction,
Sharpened,
Resized.
      Extra Info: Tornado energy.
Most of the energy of a tornado is energy of motion: kinetic energy (KE).

KE = 1/2 m v2

where,

m = mass (of air in tornado)
v = velocity (wind velocity in tornado).

Let's assume that wind velocity is typical of an F3 tornado, around 300 km/hr.
So,
v = 300 km hr-1 = 80 m s-1

To get the mass, recall that m = r V, where r = density and V = volume. The appropriate density is that of air: r = 1 kg m-3.
To estimate the volume, make a simplifying assumption: approximate the tornado shape by a vertical cylinder with height h and radius r. The volume of the cylinder is
V = p r2 h

Assume the cylinder is 1 km in height and 1 km in radius.
Substituting volume and density into the equation for mass, then substituting for mass in the expression for kinetic energy,

KE = 1/2 p r2 h v2
= 1/2 p (103 m)2 (103 m) (80 m s-1)2
= 3 x 1012 J = 3 x 1019 ergs.

That's a LOT of energy!
 
18 comments on this entry
Log in to
add a comment

A.N.Other
Nov 13, 2018
    Thank you all so much for the lovely congrats :-) .

Mepo - You are very kind - I did have to spend longer than normal PP'ing my sheep shot this challenge.

ysal
Nov 13, 2018
    Congrats on your well deserved win!

Mepo
Nov 12, 2018
    Congrats. I'm looking forward to learning more. I do admire the amount of work you put into your entries and the great results you achieve.

Lo
Nov 12, 2018
    Congratulations on 1st place. I'm glad you are going to divulge how you captured this shot.

RobertLavker
Nov 12, 2018
    Congrats on great 1st place - my first choice.

    Comments After End of Challenge    
    Comments During Voting    

mrsawyer
Nov 12, 2018
    Unique display of energy! I hope it is a miniature version.

evaan
Nov 12, 2018
    My favorite. Beautiful lighting and contrast. Neat composition, too.

A.N.Other
Nov 12, 2018
    Thanks very much both. It was a fun photo to take. I went for the huge plasma ball but sadly it had gone so took this instead.
Edited on Nov 12, 2018

Mepo
Nov 12, 2018
    An interesting shot. It looks like a very small tornado but it's impressive all the same.

Lo
Nov 12, 2018
    Excellent job of capturing all that energy. The detail is wonderful. B&W was a great choice.

A.N.Other
Nov 12, 2018
    Thank you very much both. I'm so glad you like it :-) .

jomari - No, this isn't a negative. Just a higher contrast version of what I saw with some other PP. It is inverted vertically however.
Edited on Nov 12, 2018

jomari
Nov 12, 2018
    Yes, that is a LOT of energy! Interesting photo , very high in my faves.
I assume this is inverted to the negative? At first I thought it was water going down towards a drain.

RobertLavker
Nov 10, 2018
    Thankfully I have never experienced one; however, your image certainly portrays the energy within the funnel. Extremely clever and perfect for the challenge. High in my favs.

A.N.Other
Nov 10, 2018
    Thanks both :-).

Stevebee - All will be revealed in the outtakes thread :-). It might take me longer than normal to post anything there as we have a bit of a family event tomorrow.

aoc46 - You are correct. Not much harm to a fly I'd guess but mesmerising to observe. I took dozens of photos and had a tough time deciding which to enter. I never thought of superimposing it! I'll have to give it a go some time :-).
Edited on Nov 12, 2018

SteveBee
Nov 9, 2018
    Enigmatic image. Would be more interested in the details of exactly what you photographed and how than in the kinetic energy calculation.

aoc46
Nov 9, 2018
    Despite the physics lesson, I suspect that this 'twister' was of much smaller size that a real one and so evokes a lesser sense of energy. But what if you superimposed this image on one of a landscape...? Nicely shot, nonetheless.
Edited on Nov 9, 2018

A.N.Other
Nov 9, 2018
    Sure. Please check the outtakes thread after the challenge ends.

ysal
Nov 9, 2018
    All the math aside, can you tell us how you got this shot?
Entry Navigation
First       Prev       Entry
1 of 20
      Next       Last      

Entry
Navigation



First


Prev

Entry
1 of 20


Next


Last

Vote Stats
20 total votes:

1st  (7): |||||||
2nd  (4): ||||
3rd  (4): ||||
4th  (1): |
5th  ():  
6th  (1): |
7th  (2): ||
8th  (0):  
9th  (0):  
10th  (1): |

[Votes]


By A.N.Other


Wales

72 Challenge
entries:

#180 9th
#181 3rd
#182 4th
#184 21st
#186 2nd
#187 5th
#188 2nd
#190 3rd
#191 1st
#192 23rd
#193 1st
#194 4th
#195 4th
#196 3rd
#197 9th
#198 11th
#199 21st
#200 3rd
#201 18th
#202 11th
#203 3rd
#204 4th
#205 1st
#206 2nd
#209 4th
#210 11th
#211 15th
#212 7th
#213 7th
#214 9th
#219 21st
#221 19th
#222 1st
#223 1st
#224 5th
#226 17th
#227 10th
#228 1st
#229 3rd
#231 24th
#232 16th
#233 5th
#236 1st
#237 3rd
#240 14th
#241 2nd
#242 1st
#243 19th
#244 12th
#245 8th
#246 2nd
#247 4th
#249 1st
#250 2nd
#257 2nd
#258 11th
#259 1st
#262 3rd
#263 6th
#264 4th
#265 3rd
#266 1st
#267 14th
#268 1st
#272 4th
#273 3rd
#274 7th
#275 1st
#281 17th
#282 3rd
#284 8th
#285 2nd

Avg rank:
7th




Entry
Navigation



First


Prev

Entry
1 of 20


Next


Last
    Comments? Suggestions? Problems? Click here!       Disclaimer