What is the momentum of a car with a mass of 1,300 kg traveling north at a speed of 28 m/s? the momentum of the car

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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

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;