Do any individual air molecules travel the length of the tube?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Photons with the highest energy have the longest period

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.