.... it is in extremely low concentrations therefore it is not a health hazard. Some wells contain water that has radon dissolved in it. This can be a hazard if the water is agitated or heated, allowing the gas to escape and elevate the levels that are in the building.(6) Health Risk The Surgeon General's office reports that indoor radon gas is a national health problem. This gas causes thousands of deaths every year.(7) These deaths are a result of lung cancer, which is caused by the radioactive particles that make up the gas.(8) The likelihood of getting l .....

.... of tubing, preferably glass with one end closed. When the liquid level in both arms is the same, the pressure of the sample of gas inside the closed end must equal the pressure of the external atmosphere since the downward force on the two columns of liquid is then equal. When the liquid levels are unequal, the pressures must differ. The difference in pressure can be measured in units of length of the vertical column of liquid. The mm Hg, or its modern version the torr, originated in this use of the manometer. Mercury is particularly convenient for use in m .....

.... pesticide. The Minamata Disease is a good example of what could happen if mercury enters into the environment. In the mid 1950's, more than 100 Japanese were poisoned by fish that contained methyl mercury. The mercury came from industrial waste that had been dumped into the bay where the fish were caught. The mercury bioaccumulated up the food chain. The cats the were eating the fish showed the symptoms first. They began to act very strange; running into walls and acting like they were "in a trance." The people in the village developed mental retardati .....

.... time of the solutes through a column. Simple liquid consists of a column with a fritted bottom that holds a stationary phase in equilibrium with a solvent. Typical stationary phases (and their interactions with solutes) are: solids (adsorption), ionic groups on a resin (ion-exchange), liquids on an inert solid support (partitioning), and porous inert particles (size exclusion). The mixture to be separated is loaded onto the top of the column followed by more solvent. The different components in the sample mixture pass through the column at different rates du .....

.... the atmosphere (Barstow et al. 1999), hence special problems pertaining to the acquisition of sufficient amounts of oxygen arise for aquatic organisms---namely fish. Fishes have had to develop adaptations that enabled them to adapt to this problem. Since water contains an insufficient concentration of oxygen, fishes use gills to obtain the required amount of oxygen---via the counter-current exchange process. As water enters the mouth of a fish, it passes through slits in the pharynx, flows over the gills, and exits at the back of the operculum (gill cover) (Ca .....

.... for this topic because people keep on dumping waste in the water and this is probably the biggest threat to our oceans because of people throw stuff in our oceans. This question was also good to ask for this topic because this question has a lot of answers and solutions for it like what can people in the First World do to help the Third World people out. The books and my resources found many ways to finish off this problem. I also found some insight to this problem. The resource which helped me a lot was the internet because it had the most up to date new .....

.... they came to the cities, they had always died of old age ...) FIRST of all, it is important to know that the "greenhouse effect" is not a bad thing in itself. In fact, this planet would be a life-less waste land without its natural greenhouseing. There are a collection of gases called "greenhouse gases," which are water vapor, carbine dioxide, ozone, methane, nitrous oxide, and chlorofluorocarbons (CFC). Without the natural greenhouse effect, the surface temperature of our planet would be an average of -18°C (zero degrees F). The mixture of these gases hav .....

.... reactions can proceed under milder conditions (more safely), with less hazardous waste (better for the environment), and in higher yields (better for your wallet) than a similar process using chemical reagents. Some synthetic processes can only be done using electrochemical methods, and electrochemical methods are used in the large-to-medium-scale synthesis of organic "fine chemicals" because of the financial, safety and environmental advantages. Here's a page outlining some current research by one of my graduate school professors. I can think of at least th .....