6. The red hydrogen line from the nearby star Alpha Centauri is observed to be reduced in wavelength by 0.044 nm — i. e. the line is normally 656.281 nm but it is observed at
656.237 nm — this is equivalent to a change of 0.999933.
(a) Is Alpha Centauri moving toward or away from the Sun?
(b) At what speed is Alpha Centauri moving toward or away from the Sun?

[05.02] what is the best explanation of the kinetic molecular theory as it relates to the energy of the molecules in the states of matter? (1 point) the molecules in a gas have greater kinetic energy than those in a liquid, which in turn have greater kinetic energy than the molecules in a solid. kinetic energy cannot be created nor destroyed, and, as a result, all states of matter have the same kinetic energy. the molecules in a gas have greater kinetic energy; therefore, they are more tightly packed than the molecules in either a liquid or a solid. the molecules in gases and liquids, in constant motion, have greater kinetic energy than those in a solid, which do not move or vibrate because their position is fixed.