An N-type semiconductor has hall coefficient 4.16⨉ 10-4 m³/C. The conductivity is 10 -8 S /m. Calculate its charge carrier density ne and electron mobility at room temperature.

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Estimate the change in the gibbs energy and molar gibbs energy of 1.0dm3 of octane when the pressure acting on it is increased from 1.0 atm to 100 atm. the mass density of octane is 0.703 g cm−3

This is the number of complete movements of a wave per second.