Video: The Sensory System: Definition, Parts & Functions. This lesson will examine how the sensory systems are integrated and how they function as a whole. Instead of telling you ears hear and eyes see, we will examine how these systems are actually very similar in terms of reception, signals, and translations.
Mercury is a silvery-white metal element that is liquid at ordinary room temperature; it has no taste or smell. It occurs as metallic mercury (Hg), as cinnabar (HgS) and in perhaps 25 other in organic mineral compounds. The elemental form (Hg) vaporizes at any temperature down to almost 40Â° below zero. The vapor also has no taste or smell. The specific gravity of mercury is 13.546; therefore, it is heavier than lead and, like lead and other heavy metals, it is a potent poison. Exposure to metallic mercury or mercury compounds, even in small quantities over a period of time, can cause severe poisoning.
Temperature on Mercury. Mercury is the innermost planet in the Solar System, but surprisingly it is not the hottest planet; that would be Venus. The reason for this is that Mercury has a thin atmosphere that cannot trap solar heat.Its maximum atmospheric pressure is estimated to be 0.00000000003 pounds per square inch; on Earth, the atmospheric pressure is around 14.7 pounds per square inch.Mercuryâs atmosphere is composed of very small amounts of hydrogen, oxygen, helium and sodium.The planet still get hot on the side that faces the Sun, it experiences the most extreme temperatures, which can reach as high as 700Â° Kelvin (427Â°C).he reason for this is that Mercury has a thin atmosphere that cannot trap solar heat. Its maximum atmospheric pressure is estimated to be 0.00000000003 pounds per square inch; on Earth, the atmospheric pressure is around 14.7 pounds per square inch.