Two charges, −q0 and −4q0 are a distance l apart. these two charges are free to move but do not because there is a third charge nearby.

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f