Est-ce que quelqu'un peut m'aider ?

An object's buoyant force and weight mean the same thing. a. trueb. false

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction