Will a horse galloping in a field produce and average velocity of zero

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.