Bill and amy want to ride their bikes from their neighborhood to school which is 14.4 kilometers
away. it takes amy 40 minutes to arrive at school. bill arrives 20 minutes after amy. how much
faster (in meters/second) is amy’s average speed for the entire trip?
be sure to show all necessary metric

An observer that stands still as the electron moves by him, will observe

What happens to light waves from a star as the star moves away from earth?

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?