Ireally have no idea where to start with this. could someone exaplin the answer and how they got it? theres a lot of these on my thing and i'd like to understnad it so that i can do the others on my own. teachers aren't in office today so i can't ask for : '(

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.