Atrain with mass 1000kg is moving at 15 m/s south. a second train engine with a mass of 500 kg is sitting at rest on the tracks ahead. what is the magnitude of the total momentum of the entire system? assume that after the trains crash the first train comes to a stop at the point of the crash. how fast does the second train slide? assume that after the crash the trains stick together and slide as one. how fast to they slide? assume that after the crash the second train is sliding at 20 m/s south. what is the velocity of the first train?

What are the applications of electromagnetic waves

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves