Question

What is the effect of adding dimples to a car's surface on its fuel efficiency?

Options:
A) Adding dimples to a car's surface increases its fuel efficiency.
B) Adding dimples to a car's surface decreases its fuel efficiency.
C) Adding dimples to a car's surface has no effect on its fuel efficiency.

Independent variable: Adding dimples to a car's surface
Dependent variable: Fuel efficiency
Control variable: The car's surface without any dimples

Answer 1

Adding dimples to a car's surface can increase its fuel efficiency by reducing drag and improving streamline airflow.

Step-by-step explanation:

Adding dimples to a car's surface can increase its fuel efficiency.

When air flows over a smooth surface, it creates a layer of air called a boundary layer. This boundary layer can create turbulence and increase drag, which reduces fuel efficiency. However, by adding dimples to the car's surface, it can disturb the flow of air and reduce the size of the boundary layer. This helps to streamline the airflow and reduce drag, resulting in improved fuel efficiency.

For example, golf balls have dimples on their surface, which helps them fly more efficiently through the air. The dimples create turbulence, which prevents the formation of a large boundary layer.