A brand new standard household 9-v battery has about the, Ask an Expert

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A brand new standard household 9-V battery has about the same potential energy as a 2200 lb car at the top of a 1200-ft-high hill.

(a) How long will the circuit in problem 4 run if its voltage source is replaced with a 9-V battery? Assume the 9-V battery is ideal, e.g. zero internal resistance and constant voltage. Now, a 9 V golf cart battery contains about 1000 times more potential energy than a household 9-V battery.

(b) How long would it run this circuit?

(c) If the golf cart battery was driving this circuit, what would be the current in the 8.00-Ω, 1.0-Ω, and 20.0-Ω resistors?

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