Physics, 04.07.2019 17:00 victoralaquinez
The h line in calcium is normally at 396.9nm. however, in a star’s spectrum it is measured at 398,1 nm. how fast is the star moving and is it moving towards the earth
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Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide? kg • what must the total momentum of the system be after the train cars collide? kg •
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