Which of the following processes have contributed to the evolution of the Earth over time?

I. the motion of crustal plates
II. the rock cycle
III. radioactive dating
IV. erosion
V. deposition

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.