Find the Resistance of A copper wire 5 meters long with a radius of 5mm that has a battery connected across the ends with a potential difference of 12V. Resistivity of copper is 1.7 x 10^-8 ohm Meters.
Next question is to find current (I) in the wire if it’s connected to a battery with a voltage of 12V, use ohm’s law.
What is the resistance of the wire? What is the current in the wire?

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?