To detect heart sounds, the patient should be lying down and examined in a quiet room. Left-sided S3 is best heard at the apex of the heart (the lower pointed end of the heart) with the patient lying on his left side. It is a low-pitched sound and heard best using the bell of the stethoscope with light pressure.
Adorable animal families that will make you aww. Polystyrene is a type of polymer with thermoplastic properties produced from the petroleum-derived monomer, styrene. In solid form, it is a colorless and rigid plastic, but it may also be returned to a liquid state by heating, and used again for molding or extrusion.
Polystyrene is an inexpensive and hard plastic, and probably only polyethylene is more common in your everyday life. The outside housing of the computer you're using now is probably made of polystyrene, as well as the housings of things like hairdryers, TVs and kitchen appliances.odel cars and airplanes are made from polystyrene, as well as many other toys. There's also foam packaging and insulation, and a lot of the molded parts on the inside of your car, like the radio knobs. Polystyrene is also used to make drinking cups-the hard plastic ones and also the soft foamy ones.