Q: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
The Chandrashekar Limit gives the upper bound on this quantity of white dwarf stars, and the product of the rotational analogue of this quantity and angular acceleration yields torque. This quantity appears along with velocity squared in the equation for kinetic energy. Einstein formulated an equation that equates the product of this quantity and the square of the speed of light to energy. For 10 points, name this quantity that, when multiplied by gravity, yields an object's weight and is measured in kilograms.
A:
Science