When a wheel rotates about a fixed axis do all points on the wheel have the same angular speed?

Answer asap! the weather patterns on earth are shown in this image. explain why there are convection currents; why there are hotter and colder parts of earth.

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection