Recent content by valueduser

I think a good first step would be to use some trig to figure out the vertical distance the ball travels

Hello I have a question that is giving me trouble: Light of wavelength 659.7 nm is emitted by a star. The wavelength of this light as measured on Earth is 661.1 nm. How fast is the star moving with respect to Earth? km/s Is it moving toward Earth or away from it? Here's where...