All of the following are chemical changes EXCEPT — (A) digesting beef.
(B) corroding metal.
(C) folding paper.
(D) burning wood.

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell