Displacement vectors of 5 km north, 3 km east, 2 km south, and 3 km west combine to a total displacement of

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

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 does si stand for,when referring to a system of measurement