The e ~ k relationship for the bottom of the conduction band of a semiconductor is of the form e = ak2 where a = 5 x 10-37 jm"". determine the effective mass of the electrons in the conduction band for this semiconductor and express the answer as a fraction of the free electron mass.

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents