how much longer would it take to travel a distance of 600km at a speed of 50km/h than it would at a speed of 60km/h​

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.

Sublimation- which change of state is shown in model

It would be c hope this out