The diagram below represents the electric field in the region of two small charged spheres, A and B. What is the sign of the net charge on A and B?

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?

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Why do astronauts in the space shuttle weigh less?