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2. Swimming pool - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool

   Use of a pool cover also can help reduce the amount of chemicals (chlorine, etc.) required by the pool. Outdoor pools gain heat from the sun, absorbing 75–85% of the solar energy striking the pool surface. Though a cover decreases the total amount of solar heat absorbed by the pool, the cover eliminates heat loss due to evaporation and ...

3. Swimming pool sanitation - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool_sanitation

   If the pool's water pump is operational water is drawn from the pool over a floating hinged weir (operating from a vertical position to a 90-degree angle away from the pool, in order to stop leaves and debris being back-flooded into the pool by wave action), and down into a removable "skimmer basket", the purpose of which is to entrap leaves ...

4. Solar thermal energy - Wikipedia

   en.wikipedia.org/wiki/Solar_thermal_energy

   Solar roof ponds for solar heating and cooling were developed by Harold Hay in the 1960s. A basic system consists of a roof-mounted water bladder with a movable insulating cover. This system can control heat exchange between interior and exterior environments by covering and uncovering the bladder between night and day.

5. US weekly jobless claims unexpectedly rise - AOL

   www.aol.com/news/us-weekly-jobless-claims...

   The number of Americans filing new applications for jobless benefits unexpectedly rose last week and more people continued to collect unemployment checks at the end ...

6. Walter Scott Jr. - Pay Pals - The Huffington Post

   data.huffingtonpost.com/paypals/walter-scott-jr

   From January 2008 to December 2012, if you bought shares in companies when Walter Scott Jr. joined the board, and sold them when he left, you would have a -5.6 percent return on your investment, compared to a -2.8 percent return from the S&P 500.

7. Solar pond - Wikipedia

   en.wikipedia.org/wiki/Solar_pond

   Diagram of a solar pond. A solar pond is a pool of saltwater which collects and stores solar thermal energy. The saltwater naturally forms a vertical salinity gradient also known as a "halocline", in which low-salinity water floats on top of high-salinity water. The layers of salt solutions increase in concentration (and therefore density) with ...