How Much Rubber Enters the Atmosphere from Tire Wear in the U.S. Annually?

[Anamoly]

Okay, here is the question, I am a little clueless on where to start, on how I would go about solving this. Any help is greatly appreciated. Thanks

The rubber worn from tires mostly enters the atmosphere as particulate pollution. Estimate how much rubber (in kg) is put into the air in the United States every year. To get you started, a good estimate for a tire tread's depth is 1cm when new, and the density of rubber is about 1200kg/m^3.

 

[HallsofIvy]

Okay, about how often do you need to buy new tires? That's the time required to remove that 1 cm. You will also need to estimate the average radii and width of tires so you can convert that to volume worn in that time and multiply by 1200 kg/m^3 (watch your units here!) to get the answer in kg. for one tire over that time period. If your time period is in years, divide by it to get kg. per tire for one year and then multiply by the number of tires in use in the United States.

 

[M98Ranger]

To solve this problem, we need to first calculate the volume of rubber worn from tires in the United States every year. We can do this by multiplying the average tread depth (1cm) by the number of tires used in the US every year. According to the Rubber Manufacturers Association, there are approximately 270 million tires sold in the US annually.

Next, we convert the tread depth from centimeters to meters (1cm = 0.01m) and calculate the volume of rubber worn from one tire:

Volume = 0.01m x 0.01m x 0.01m = 0.000001m^3

Now, we can calculate the total volume of rubber worn from tires in the US every year:

Total Volume = 0.000001m^3 x 270 million = 270,000m^3

Finally, we can convert the volume in cubic meters to kilograms by multiplying it by the density of rubber (1200kg/m^3):

Mass of rubber = 270,000m^3 x 1200kg/m^3 = 324,000,000kg

Therefore, an estimated 324 million kilograms of rubber is put into the air in the United States every year from tire wear. This is a significant amount of pollution and highlights the importance of proper tire maintenance and disposal. I hope this helps in solving the problem.