a charge Q exerts a 2.4 N force on another charge q. If the distance between the charges is doubled, what is the magnitude of the force exerted on Q by q ?

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

What object a collides with object b and bounces back its final momentum is?

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?