The cosmic background radiation is uniform throughout the Universe and is around 3 degrees Kelvin. Is it true or false?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Displacement is the slope of a velocity vs. time graph a. true b. false

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?