Energy lost due to resistance?

If electricity passes through a system at 12 volts, with 0.42 Amps of current, and 28.8 ohms of resistance, how do you calculate the energy lost in joules?

berkeman
Mentor
If electricity passes through a system at 12 volts, with 0.42 Amps of current, and 28.8 ohms of resistance, how do you calculate the energy lost in joules?

Power multiplied by time...

$P=I^2R$ is energy loss per unit time.