In an environmental study on marine pollution, researchers measured the concentrations of two types of microplastics, Polyethylene (PE) and Polypropylene (PP), in different aquatic zones.
The results are represented in the bar chart below:
Calculate the order of magnitude by which the concentration of Polypropylene (PP) in the coastal sediment is higher than the concentration of Polyethylene (PE) in the open ocean. Show your working.
An electron micrograph of a spherical microalgal cell (Coscinodiscus) from an estuary water sample is also analyzed. In the image:
Calculate the actual volume of this microalgal cell. Assuming it is perfectly spherical, use the formula for the volume of a sphere:
V=43πr3 V = \frac{4}{3}\pi r^3 V=34πr3Give your answer to four significant figures. Show your working.
