Compare and contrast the average kinetic energy of 0.5 L of coffee at 34°C

The density of a liquid could be found by using

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?

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