Earth’s atmosphere is constantly bombarded by cosmic ray protons that originate somewhere in space. if the protons all passed through the atmosphere, each square meter of earth’s surface would intercept protons at the average rate of 1500 protons per second. what would be the electric current intercepted by the total surface area of the planet?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

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 •  

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=