When water is boiled under a pressure of 2.00atm, the heat of vaporization is 2.20×106j/kg and the boiling point is 120∘c. at this pressure, 1.00kg of water has a volume of 1.00×10−3m3, and 1.00 kg of steam has a volume of 0.824m3.
a)compute the work done when 1.00kg of steam is formed at this temperature
b)compute the increase in internal energy of the water.

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.