Final answer:
The ricochet area for Tank Gunnery SDZs is determined by muzzle velocity and air resistance.
Step-by-step explanation:
The variables that comprise the ricochet area for Tank Gunnery SDZs include muzzle velocity and air resistance.
Muzzle velocity refers to the speed at which the bullet leaves the gun, and a larger muzzle velocity would affect the problem by causing the bullet to cover a larger distance in a shorter time.
This could potentially lead to the bullet hitting higher or lower depending on the angle of the gun.
Air resistance, on the other hand, is a force that opposes the motion of objects moving through the air. It can cause the bullet's trajectory to be altered, making it deviate from the expected path.
The effect of air resistance would be more pronounced for bullets with larger muzzle velocities.