Carlos is making phosphorous trichloride using the equation below. he adds 15 g of phosphorus.

2p +3cl2 → 2pcl3

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •