Which of the following are electromagnetic waves?
a. sound waves
b. water waves
c. ground waves l
d. ight waves

Which feature indicates that mars resides in the inner region of the solar system

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

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.