Explain, using these results, the type of heat energy change that occurs when calcium chloride dissolves water Temperature of water at start = 21 C

Temperature of mixture after stirring = 32 C

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?