The Seven Roles of the President Name: ______________________________________________ SKILL: CIvICSThe job of the U.S. President is really seven jobs in one. What are those responsibilities? Read about them below. Then answer the following questions. A. Chief of the Executive Branch The President oversees federal (national) agencies, appointing their directors and creating policies to determine their goals during his term.
What does the term Parts Per Million (PPM) mean? Total dissolved solids (TDS) is typically expressed in parts per million (ppm). PPM is a common unit for measuring the concentration of elements in the nutrient solution. One ppm is one part by weight of the mineral in one million parts of solution.
EC is measured by an EC meter, which is also known as a solubridge. These meters normally look like pH meters, but instead of the glass bulb electrodes, EC meters have metal prongs or bridges to measure the electrical current that passes between them.n some instances, you may see EC measured in PPM (parts per million). You can purchase meters that will read EC in PPM or convert and mS/cm reading to PPM. To change mS/cm to PPM for aqueous solutions, multiply the reading by 640. For converting 1:2 ratio soil solutions, multiply by 1,500 to get a reading in PPM.