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Project title Tire pressure and gasoline mileageFeatured science projectScience project video
Difficulty Level High school
Project page  Click here to view this science project

Description
We often read in road safety guides and magazines that we should always ensure that the tires on our cars are properly inflated with the correct amount of air pressure. Aside from affecting safety, under-inflated tires supposedly result in higher fuel consumption. This science fair project was conducted to determine if this is indeed true ie: how does tire pressure affect the gasoline mileage of a car. The science fair project was carried out using 5 different types of cars and measuring the distance, a car with 100% and 80% of the recommended tire pressure, can travel with a gallon of gas. 

Instructions preview
1. For this science fair project, the independent variable is the type of car and tire pressure used – 100% and 80% of the recommended tire pressure. The dependent variable is the distance the car is able to travel on 5 gallons of petrol. This is determined by observing and recording the odometer readings in the car. The constants (control variables) are the amount and type of gasoline, the traffic on the highway, the car’s age and maintenance. 2. 5 drivers and 5 cars are used for this science fair project. The 5 types of cars used are a .....
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