Linearly polarized microwaves with their electric field in the vertical direction are incident on these three metal polarizers. Which polarizer lets the most microwave light pass

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.