60.0 Ω 15.0 Ω 45.5 Ω 20.0 Ω 80.0 Ω An idealized voltmeter is connected across the terminals of a 20.0-V battery, and a 60.0-0 appliance is also connected across its terminals. If the voltmeter reads 15.0 V, what is the internal resistance of the battery?
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