PLS HELP:) If the incident angle of a light ray is 30 degrees to the normal, what will the reflected angle be?

What causes the formation of ocean currents?

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

Which planet do you think would be easiest for humans to colonize some day?