Question: what are three physical properties of a tennis ball?
Answer: Mass: 56-59.4 gm.
Size: 2.575-2.700 inches (6.541-6.858 cm)
Bounce: 53-58 inches (135-147 cm)
Forward deformation: 0.220-0.290 inches (0.559-0.737 cm)
Return deformation: 0.315-0.425 inches (0.800-1.080 cm)