‘press down’ or ‘sink down’.) The mental object of a relationship betwixt sadness and manic disorder can be traced back to the Ancient Greeks, and particularly to Aretaeus of Cappadocia, who was a physician and philosopher in the time of nero claudius caesar drusus ge or emperor of rome (first century AD). Aretaeus delineated a group of patients that who ‘laugh, play, dance night and day, and sometimes go openly to the marketplace crowned, as if victors in some contest of skill’ only to be ‘torpid, dull, and sorrowful’ at other times. Although he advisable that some patterns of demeanor resulted from one and the self disorder, this idea did not increase currency until the modern era.
It's Elemental - The Element Helium
Atomic Number: 2 small Weight: 4.002602 Melting Point: 0.95 K (-272.2°C or -458.0°F) cookery Point: 4.22 K (-268.93°C or -452.07°F) Density: 0.0001785 grams per cubic centimeter period of time at Room Temperature: Gas Element Classification: Non-metal Period Number: 1 Group Number: 18 Group Name: Noble Gas What's in a name? Sir Norman Lockyer, an English astronomer, realized that this line, with a wavelength of 587.49 nanometers, could not be make by any element known at the time. Sir William Ramsay, a Scottish chemist, conducted an experiment with a mineral containing uranium called clevite. Pierre-Jules-César Janssen, a French astronomer, noticed a yellow line in the sun's spectrum while studying a unconditioned star eclipse in 1868. yore and Uses: Helium, the second most abundant element in the universe, was discovered on the sun before it was found on the earth.
When was the first battery invented? | HowStuffWorks
Batteries are a common source of power in our present age. We use batteries to first our cars, to power our laptops, to permit us to talk on our cell phones for time of day and even to actuate some of our electric vehicles for miles and miles on a one-member charge. They can reach from sizes elflike than a writing implement eraser to as bulky as 2,000 square meters (21,528 honest feet).