In which medium does sound travel faster

Does any one know what real love is and would anyone be willing to share it with me?

Modify the equation fδt=δ (mv) to find the force of friction.

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.