Question1

Water has a specific heat capacity of 4186 J/kg °C. A tank contains 500 kg of water at 10.0°C. The water is heated up to a temperature of 90.0°C. If electricity costs $0.100 per kilowatt-hour, then what is charge of heating the water?

Question2

A ring of radius R, charge Q and mass M is spinning around its symmetry axis. The ring sits on a horizontal frictionless surface. A uniform outside magnetic field of strength B is parallel to the plane of the ring. Find out the angular velocity at which there is zero normal force between one edge of ring and surface.

Question3

Compute molar volume for 3-methylhexane at p=3000psia and T=60F given that the critical pressure and critical temperature for 3-methylhexcane are 408.1psia and 503.8F respectively. (Show all steps).