Aluminum oxide, Al2O3, can be produced during space shuttle launches. Show that the sum of the positive and negative charges in a unit of Al2O3 equals […]
COUNTIES? Last months Monitor contained a map of the area surrounding the Shenandoah Valley. That map displayed the outlines of the counties and cities. How many […]
Human impact on the Earth’s environment is poignantly demonstrated in the Mississippi River drainage into the Gulf of Mexico. Every spring, high levels of nitrogen and phosphorous […]