The nucleus of an atom can have either a positive or negative charge true false?

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?

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx