When an electric circuit operates, a buzzer makes a sound. what happens to the electric charges in this circuit?

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

The material that keeps its new shape after it is stretched is called?

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?