Find the value of 'a' for which the following vectors are perpendicular to each other:- A = î - aj + 3k and B = 3î + 3 j - 4k

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.

Answer///(d) atoms contain small,negatively charged particles;