The Planck's constant is one of the fundamental constants in physics.

In this equation, x is a variable and 5 is a constant.

This recipe requires a certain amount of ingredients.

He makes it a point to read a certain number of books every month.

What is the constant term of this equation?

Avogadro's constant is a very important constant in physics.

In order to calculate the integral constant, it is necessary to solve the differential equation.

Fundamental knowledge of mathematics is necessary for daily life.

He is an expert in physics.

It is important to learn the basic grammar of Japanese.