A motor boat is headed at a velocity of 25 kilometers/hour toward the north, while thw velocity of the water current is 12 kilometers/hour to the west. What is the magnitude of the boat's resultant velocity?

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

What are similarities and differences between refraction, reflection, diffraction and absorption?

Patricia is trying to compare the average rainfall of new york to that of arizona. a comparison between these two states for the months of july through september would best be measured in