I know it's (heat energy x -1) but I forgot to write down the explanation and I cannot find it on any corner of the internet. Any ideas? like for example:
Calculate the heat gained by the water in units of joules:
q= m(50.00) x Cp(4.184) x dT(1.90) = 396.7 joules
How much heat did the metal lose? Explain
Heat lost = q x -1 so -396.7 but how?