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Electric Eel Zaps a Crocodile Videos for Engineers
If you are one of those outdoor types who loves to explore dangerous environments, watch closely. This video shows what can happen when a crocodile decides to eat an electric eel for dinner. It is an amazing, albeit gory, sight to behold. In a more urbane demonstration of the electric eel's potential (pun intended), an aquarium in Japan lights a Christmas tree with the charge supplied compliments of the beast in the tank. The electric eel is actually not an eel, but a knifefish. It breathes air at the surface, then dives for 10 minute periods. It can generate up to 500 volts at 1 amp (500 watts), delivered at 10 Hz up to a few hundred Hz. Recall that it only takes 1/10 amp to kill a man. At 500 V, a body resistance of less than 5 kΩ spells doom.