¿Qué es la carga eléctrica de un cuerpo?

The four giant gas points that are made primarily of lightweight elements are

What is the speed of an object at a given moment?

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?