A pacemaker applies $75$ stimulating square$-$pulses per minute to the heart. The pulse length is $0\mathrm{.}5ms,$ and the amplitude is $5V.$ Two electrodes convey the pulses from the pulse generator to the heart wall. The resistance bs the heart tissue between the $?$connecting electrodes is $600$ Ohm. Calculate the energy in two stimulating square$-$pulse