Define positive feedback in systems and explain how positive feedback is responsible for the loud screeching noise that is heard when a microphone gets too close to a speaker.

The variables for this experiment include mass, volume and the materials in the various balls, as well as their densities. in part iii, you will be investigating the questionable baseball. use the drop-down menus to complete the sentences and identify the independent and dependent variables. in part iii, the independent variable, the one that is intentionally manipulated, is . in part iii, the dependent variable, the one that you measure the response in, is

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?