:) describe a solution and tell if the parts are mixed chemically or physically.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

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.

This is the number of complete movements of a wave per second.