How to calc. the Energy of a big water wave?

[Kedas]

Hi

 

I was wondering how big/small would an asteroid have to be to generated about an equal devestating effect as the earthquake (8.9) if it woud impact at the same place.

 

The earthquake energy is about 48 million tons of TNT (if I'm correct)

(assuming 6 million tons of TNT= 8 on the Richter scale)

 

So it are actualy two questions:

- size of an incoming asteroid

based on this link that would be less than 75meters

http://www.astronomycafe.net/qadir/q975.html

 

- how to calulate the energy contained in a wave of water?

 

 

correction: Richter scale isn't a factor 10 but 10^1.5 so the energy would be more likely about 1412000TJ or 3374 Megatons.

also Richter scale 8 is more like 15 Megatons accorfing to this site.

http://www.geop.itu.edu.tr/~onur/seis/energy.html

[bloodhound]

right now i would just use the 1/2 mv ^2 .... after i do my fluid mechanics module next semester i might know better

[Kedas]

right now i would just use the 1/2 mv ^2 .... after i do my fluid mechanics module next semester i might know better

 

and what is v?

(water isn't moving horizontally until it reach the coast)

[5614]

wouldnt v be velocity???

 

i mean its not voltage!!!

[Kedas]

wouldnt v be velocity???

 

i mean its not voltage!!!

 

yeah but my queston was which one, it's not like there is only one object moving at a constant speed.

[bloodhound]

i would just take chunks of water. and define the chunk as one object

[5614]

surely the velocity of the wave moving towards the beach.

 

i think the reason bloodhound does a seperate fluid mechanics module is quite clear!

[bloodhound]

i am not doing it now, but ill be starting once my exams are over in january