What is the mathematical expession for parallel combination?

What is the mathematical expression for series combination?

What is the mathematical expression of linear magnification?

What is the mathematical expression for Joule's Law on heating?

Write the mathematical expression for pressure law.

Write the mathematical expression for Boyle's law.

Write the mathematical expression of thermal conductivity.

(i) find the variance of the number obtained on a throw of an unbaised die (ii) what is the mathematical expectation of the sum of points on n dice ?

Write the mathematical expression of refractive index

Write the mathematic expression for Coulomb's Law.

What is the mathematical formula for Boyle's law?