Atank whose volume is 0.01 m^3, initially evacuated. a pinhole develops in the wall, and the air from the surroundings at 21 degrees c, 1 bar enters until the pressure in the tank is 1 bar. if the final temperature of the air in the tank is 21 degrees c, determine the heat transfer between the tank contents and the surroundings in kj.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.