Two tanks are connected by a valve. One tank contains 4 lbm of Oxygen at 150F and 12 psi. The other tank holds 6 lbm of the same gas at 100F and 15 psi. The valve is opened and the gases are allowed to mix while receiving energy by heat transfer from the surroundings. The final equilibrium temp is 130F. Determine the final pressure in psi. Please use R for Oxygen as 0.3353 (psi*ft^3)/(lbmR)

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d