If a pure substance undergoes an infinitesimal reversible process between two equilibrium states c) the change in internal energy is given by du tds pdv show that if t is held constant, the first energy equation is given by au др t ат -p av (10 marks) (av show cy bt d) s

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?