K.E.=
![\frac{1}{2} m {v}^{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20m%20%7Bv%7D%5E%7B2%7D%20)
so just sub in the info you are provided with.
266.45x10^3=0.5×100xv^2
V is 73.
Ok I guess you are gonna use arrow/spear. Ok so what I learned is that the best place to hit and fish is the gills or the eye(s) because without the gills fish won't be able to breath.If you hit it on the eye it will take a while to kill the fish.The fish will feel lots of pain and start swim like crazy and probably go away.So i will say the BEST way to kill a fish to to hit it's gills.
In case you don't have any materials to kill fish:
IF you are in the wild with fish and you don't have a hook,spear,arrow, etc. I will recommend you to use a rock that his big but easy to grip.Hit the fish on top of its head just behind the eyes.Or get a stick no too thick or too skinny just like between those and start whittle it to a arrow then aim and shoot.
Hope this helps! =D
Gravity and falling objects
Well let's analyse.
First we know Ohm's law of resistance that states:
![R=\dfrac{U}{I}](https://tex.z-dn.net/?f=R%3D%5Cdfrac%7BU%7D%7BI%7D)
Where R is resistance, U is voltage and I is current.
If we express current we get:
![I=\dfrac{U}{R}](https://tex.z-dn.net/?f=I%3D%5Cdfrac%7BU%7D%7BR%7D)
Because resistance cannot be equal to 0 (violation of mathematical law) the only thing that may cause current being zero is voltage.
Which means that as long as your voltage is bigger than 0V then there will be current (if we are talking about AC).
So to answer the question: Electric current is caused by voltage and regulated by resistance.
Hope this helps.
r3t40