What is the cross product hand rule and how is it used in physics?

The cross product hand rule is a method used in physics to determine the direction of the resulting vector when two vectors are multiplied together using the cross product operation. To apply the rule, align the fingers of your right hand in the direction of the first vector and then curl them towards the second vector. The direction in which your thumb points is the direction of the resulting vector. This rule is commonly used in electromagnetism and mechanics to determine the direction of magnetic fields, torque, and angular momentum.