These are your points you get for doing pacifist also can i get some ketchup

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

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?