A positively charged particle moves through a uniform magnetic field. The animations show the field vectors (position is given in millimeters and time is given in seconds). Which animation is correct? Explain. Link for animations:

What is work? how much work is done to move an object 0 meters?

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?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?