A rod of lightning strikes 400 meters away from a stationary observer. Find the time it takes for the observer to hear a sound in air at STP.
Calculate the time it takes for the light to reach the observer.

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.