Two gas storage tanks are interconnected through an isothermal expander. tank 1 (v = 1) is initially at 298 k and 30 bar. tank 2 (v = 1) is initially at 298 k and 1 bar. reversible heat transfer is provided between the tanks, the expander, and the surroundings at 298 k. what is the maximum work that can be obtained from the expander when isothermal flow occurs from tank 1 to tank 2?

Why is there friction between objects

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.