A stock person at the local grocery store has a job consisting of the following five segments:(1) picking up boxes of tomatoes from the stockroom floor(2) accelerating to a comfortable speed(3) carrying the boxes to the tomato display at constant speed(4) decelerating to a stop(5) lowering the boxes slowly to the floor. During which of the five segments of the job does the stock person do positive work on the boxes?

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

Na food processing facility, a spherical container of inner radius r1 5 40 cm, outer radius r2 5 41 cm, and ther- mal conductivity k 5 1.5 w/m · k is used to store hot water and to keep it at 100°c at all times. to accomplish this, the outer surface of the container is wrapped with a 800-w electric strip heater and then insulated. the temperature of the inner surface of the container is observed to be nearly 120°c at all times. as- suming 10 percent of the heat generated in the heater is lost through the insulation, (a) express the differential equation and the boundary conditions for steady one-dimensional heat conduction through the container, (b) obtain a relation for the variation of temperature in the container material by solving the differential equation, and (c) evaluate the outer surface tempera- ture of the container. also determine how much water at 100°c this tank can supply steadily if the cold water enters at 20°c.