Bromine vapour is heavier than air. even so it's spreads upwards in the experiment above. Why?

Why does lightning travel from clouds to the ground?

Define the terms moral development and moral reasoning.

An electron moving at 5.06 103 m/s in a 1.23 t magnetic field experiences a magnetic force of 1.40 10-16 n. what angle does the velocity of the electron make with the magnetic field? there are two answers between 0° and 180°. (enter your answers from smallest to largest.)