Isaac is slowly stirring a big pot of soup using a ladle. He feels a little tired after stirring for half an hour. He decides to investigate whether the soup gains energy in the form of heat when work is done (by stirring) on it. He selects a few liquids from the laboratory to conduct this experiment. (a) What questions should Isaac ask before he conducts the experiment?(b) given that work done and energy is related, what is a possible hypothesis for isaac's experiment? ​