The total energy stored in the atoms and molecules within a substance is called? internal energy

external energy

temperature (wrong answer)

Kelvin ​

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

You can decrease the resistance of a length of wire by