A gas expands from I to F in the figure below. The energy ad…

A gas expands from I to F in the figure below. The energy added to the gas by heat is 406 J when the gas goes from I to F along the diagonal path. (a) What is the change in internal energy of the gas? (b) How much energy must be added to the gas by heat for the indirect path IAF to give the same change in internal energy?  

A 129-kg block is released at a 5.6 m height as shown. The t…

A 129-kg block is released at a 5.6 m height as shown. The track is frictionless. The block travels down the track, hits a spring of force constant equal to 1197 N/m. (a) Determine the speed of the block as it hits the spring. (b) Determine the compression of the spring from its equilibrium position when the block comes to rest momentarily.