A hippo is dozing under water with only its small nostrils sticking out. It has a mass of 2600 kg and a volume of about 2.54 m3 after exhaling. How much force does it exert on the ground of the pool (fresh water, density 1g/cm3)

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Ithink it is letter b, i may be wrong but i think that is the answer

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

Ithink the answer is fusion