What does the slope represent if the voltage vs current value graph

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

The ability to make things happen is also called a. heat b. force c. matter d. energy

Heating water for hot cocoa while sitting next to a campfire can be examples of conduction, convenction and radiation at the same time agree disagree it depends how you know