Anutritionist is interested in whether two proposed diets, diet 1 and diet 2, work equally well in providing weight-loss for customers. in order to assess a difference between the two diets, she puts 50 customers on diet 1 and 60 other customers on diet 2 for two weeks. those on diet 1 had weight losses with an average of 11 pounds and a standard deviation of 3 pounds, while those on the latter lost an average of 8 pounds with a standard deviation of 2 pounds. do the diets differ in terms of their weight loss? (alpha 0.05)

1kg of water contained in a piston-cylinder assembly undergoes two processes in series from an initial state where the pressure is 3.0 bar and the temperature is 150°c process 1-2: the water is compressed isothermally to a volume of 0.25 m^3 with 120 kj of work being done to the system. process 2-3: the water is heated at constant volume to a final pressure of 10 bar. a. find the change in internal energy for the system. b. calculate the amount of heat transferred, in kj. c. sketch both processes on a t-v diagram. (196.33 kj/kg, 76.33 kj)