What are the corresponding changes in bap air concentrations

Reference no: EM131292582

Heavy duty vehicles (hdv) using diesel fuel emits carcinogenic hydrocarbon, benzo[a]pyrene (BaP) directly to the air. A detailed investigation of BaP emissions between 1961 and 2004 was recently reported by Beyea et al. (2008, Environmental Science Technology). Consider the Baltimore Harbor Tunnel that is 2.31 km long, 6.7 m wide, and 4.1 m high. The maximum speed of vehicles within the tunnel is 80 km/h. Wind parallel to the tunnel blows in at 4 m/s. It is estimated that 2500 vehicles per hour with 12% hdv mix, moving at an average speed of 46 km/h transits through the tunnel. If the estimated emission factor for BaP was 40μg/km in 1961 and 5μg/km in 2004, what are the corresponding changes in BaP air concentrations during this period?

Reference no: EM131292582

Questions Cloud

Write the obituary about the historical work : write the obituary, you must utilize at least three sources. ONE source must be a biography or historical work written about your figure. I recommend that you use historical journal articles. At least three reputable sources must be used for full ..

Computer innovations in information technology today : Explain the role of early computer innovations in information technology today. Explain the benefits and drawbacks to outsourcing in at least three different countries. Identify the countries, the reason to outsource to them, and the drawbacks and be..

Who benefits more from the drop in the market interest rate : What is the present-day value of a 10-year discount bond with a face value of $1000 if the market interest rate is 7%? Suppose the market interest rate falls to 5%. Is this good news for the holders of the above two bonds? Why or why not? Who benefit..

Organization founders-leaders and history : At least 5 pages, APA formatHow culture emerges in an organization and how it links to organization's founders, leaders, and history.The significance of reasoning for organizational culture change.

What are the corresponding changes in bap air concentrations : It is estimated that 2500 vehicles per hour with 12% hdv mix, moving at an average speed of 46 km/h transits through the tunnel. If the estimated emission factor for BaP was 40μg/km in 1961 and 5μg/km in 2004, what are the corresponding changes in..

Describe the stakeholders position on health care reform : Prepare a PowerPoint presentation containing 10-15 slides in which you - Describe the stakeholders position on health care reform.

Communication across genders : Communication Across Genders Please study communication across genders. Apply the following guidelines in ALL of your assignments:

Preadjustment balance in accounts receivable on december : During 2013, Hungryman had $18,500,000 of credit sales, collected $17,945,000 of accounts receivable, and wrote off $60,000 of accounts receivable as uncollectible. At year end, Hungryman performs an aging of its accounts receivable balance and estim..

Develop project charter process of the initiating process : PMBOK® Guide Develop Project Charter Process of the Initiating Process Group, be important? What is the purpose of the scope statement produced during the Define Scope process of planning the project? Explain how the project management process gro..

User Account

All Pages