Water

Water in three states: liquid, solid (ice), and gas (invisible water vapor in the air). Clouds are accumulations of water droplets, condensed from vapor-saturated air. Video demonstrating states of water present in domestic life. Water is a chemical compound with the chemical formula H 2O. A water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds. Water is a liquid at standard ambient temperature and pressure, but it often co-exists on Earth with its solid state, ice, and gaseous state, steam (water vapor). Safe drinking water is essential to humans and other lifeforms even though it provides no calories or organic nutrients. Chemical and physical properties Impact from a water drop causes an upward "rebound" jet surrounded by circular capillary waves. Water is the chemical substance with chemical formula H 2O: one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. The major chemical and physical properties of water are:

ncern over water shortage at Olympic Games - Home News - UK Spectators are not permitted to bring more than 100ml of water into the Olympic Park and other Games venues but are told they can bring in empty bottles and fill them. But today, the Commission for a Sustainable London 2012 has voiced concerns about a shortage of water at the sites. The body, which monitors the sustainability of the Games, said there have been queues at all venues for water. They accused London 2012 organisers of getting caught short and not anticipating the demand. Shaun McCarthy, chairman of the Commission for a Sustainable London 2012, said: "London 2012 is the first Games in recent times to offer free drinking water, which is a huge moment not just for the Games but for the events sector. "As such we are saddened to see that the organisers have been caught unaware and a number of venues have run out. "We understand that Locog is addressing this issue and that they have a plan for an urgent resupply of drinking water and deployment of more fountains across venues.

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