Calculate the work (in Joules) done on the system for each of the following examples (the system is given in italics). Specify the sign of the work. a. A box of groceries weighing 10 kg is carried up 3 flights of stairs (10 m up altogether). b. A 6.0 V storage battery is charged by a power supply for 2 h with a current of 5.5 A. c. A muscle of 1 cm2 cross section and 10.0 cm length is stretched to 11.0 cm by hanging a mass on it. The muscle behaves like a spring that follows Hooke's law. The Hooke's la (spring) constant for the muscle was determined by finding that the muscle exerts a force of 5.00 N when it is stretched from 10.0 to 10.5 cm. d. The volume of an ideal gas changes from 1.00 L to 3.00 L at an initial temperature of 25C and a constant pressure of 1 bar. e. The volume of an ideal gas changes from 1.00 L to 3.00 L at an initial temperature of 25C and a constant pressure of 1x10-6 bar. f. The volume of an ideal gas changes from 1.00 L to 3.00 L at a