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i can't believe it's the end of the holiday week already. i feel so unmotivated to study for geography.

kirchoff's law for current: the algebraic sum of all currents at a junction is zero. thats mean the sum of the currents entering the junction equals the sum of currents leaving the junction.

kirchoff's law for potential difference: the algebraic sum of all electromotive forces equals the algebraic sum of all potential differences in a closed loop.

i remember ms huang teaching us about kirchoff's laws. 幻想我有這份頑強的漂亮。