You take a lab battery and, when it isn't connected to a circuit, you measure a voltage of 4.00-v with a voltmeter. you then connect the battery to a 200-12 resistor and measure a current of 17.5-ma. what is the internal resistor of this battery?

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

What is the temperature in degrees celsius of a substance with a tempature of 49k

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit