What type of electromagnetic wave is sent as a signal by a cellphone to the nearst cell tower a- gamma rays b- microwaves c-x-rays d- ultravilot please put a b c or d

Why is metal often used for cooking pan?

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.