A person swims directly across a 30m wide river towards a target location. The person swims at 0.83m/s and the river flows at 3m/s. When the person reaches the other side, how far down the river are they from their initial target?

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.

Wavelength divides in half and speed stays the same.