Final answer:
The syrup and sauce rule refers to the concept of viscosity in fluids. Viscosity is the property of a fluid that determines its resistance to flow.
Step-by-step explanation:
The syrup and sauce rule refers to the concept of viscosity in fluids. Viscosity is the property of a fluid that determines its resistance to flow. Fluids with high viscosity, such as syrup and sauce, flow slowly and stick to surfaces, while fluids with low viscosity, such as juice, flow more freely and quickly.