how does the strength of the forces that hold the basic particles of a substance together relate to the temperature at which the substance changes state

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

Asher cycles 12 miles in 16 hours. what is his speed?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f