The upward normal force exerted by the floor is 620 N on an elevator passenger who weighs 650 N. You may want to review . For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Determining acceleration from force. Part APart complete What is the magnitude of the acceleration?

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.