Application Exercise 22nd March 2017

When Styrofoam packing peanuts are immersed in acetone (the primary component in some nail-polish removers), they dissolve. If the acetone is allowed to evaporate, a solid remains. the solid still consists of Styrofoam, but now it is solid and much denser. Explain.Gas of the foaming agent is given out when acetone dissolves the polymer. the polymer then collapses and become denser. Consider Spectra, Allied-Signal Corporation’s HDPE fiber, used as liners for surgical gloves. Although the Spectra liner has a very […]

Application Exercises 15th March 2017

Mammoth Cave National Park in Kentucky is in close proximity to the coal-fired electric utility in the Ohio Valley. Noting this, the National Parks Conservation Association (NPCA) reported that this national park had the poorest visibility of any in the country.a. What is the connection between coal-fired plants and poor visibility?Coal-fired plants release sulphur dioxide, creating sulphate particles theatre responsible for 60 – 85% of poor visibility in eastern parks.b. The NCPA reported “the average rainfall in Mammoth Cave National […]