About 1980, the United States Postal Service detached the two-thirds of greater Oxon Hill that was furthest from Washington, D.C. and re-defined that part as a new postal designation, Fort Washington, MD.
A gallon of paint is heavier than a gallon of water. Mostly anything that mixes a solid into the water will be heavier than water. Most homes have a can of Spackle , which is a common liquid for patching drywall and it is almost twice as heavy as water. Of course,mercury is the heaviest liquid, but isn't common around the house anymore. But if you have a mercury switch for turning on your furnace, then that would be the heaviest common liquid by far. Which, I assume, discounts mercury - oil is lighter than water, so two choices would be sugar water or salt water.
Mercury, a liquid metal also known as quicksilver, combines with carbon to make organic mercury compounds; methylmercury is the most common one. Methylmercury is made primarily by microscopic organisms in water and soil.Methylmercury builds up in the tissues of fish.Larger and older fish tend to have the highest levels of mercury. Research shows that most people's fish consumption does not cause a health concern. Almost all fishand shellfishcontain traces of mercury.he risks from mercury in seafood depends on the amount and type that is consumed. The EPA and the U.S. Food and Drug Administration (FDA) give the following advice to those at highest risk such as pregnant women: * Do not eat shark, swordfish, king mackerel or tilefish. These have high levels of mercury.