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)

In a system, when potential energy decreases, then entropy also decreases. true false

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c

Determine the net charge of the predominant form of arg at (a) ph 1.0, (b) ph 5.0, (c) ph 10.5, and (d) ph 13.5