True or false? when energy changes form, some of the energy changes to heat.

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Why do cells appear different in distilled water than they do in 10% salt water?

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?