The odor of a smelly shower drain can be eliminated by removing debris from the drain. Discarding the odor-causing material in the garbage outside the home ensures the smell does not invade other areas. Boiling water dissolves oils and grease deposited on the sides of the pipe in the drain, which add to the smell.
Luckily for us, Nernst derived an equation that allows us to determine at what point the two forces (chemical and electrical gradients) balance each other - in other words, at what point we have an ionic equilibrium.
Math is important because it is in everything we do. For example, to make things quicker you could multiply or divide. Math can also be used to see the total cost of a number of items. We use math for time or location (latitude and longitude). Math can also be found all the time in nature (Fibonacci numbers).