Olbers's paradox is an apparently simple question, but its resolution suggests that the universe is finite in age. What is the question

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?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.