Calculate the density of the magnesium unit cell hcp has 6 atoms per unit cell for the full hcp structure. the primitive form of the hcp has 2 atoms/unit cell. at. wt=24.305g/mole, a=3.29a, c=5.21 a

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

Fluids at rest possess no flow energy. a)- true b)- false

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?