Net ionic equation describes the reaction between Pb(NO3)2(aq) and Na2CO3(aq)

Who was the first scientist to measure speed as distance over time?

The two required components for a generator are

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 •