When the mass of an object decreases, the force of gravity

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Argon, neon, and xenon are examples of

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system