Oxygen exists in a gaseous state at room temperature. With a boiling point of minus 297 degrees Fahrenheit, oxygen exists in its gaseous state on Earth almost all of the time unless it is deliberately liquefied.
Oxygen transitions from liquid to solid at minus 361 degrees Fahrenheit. Liquid oxygen can actually be produced using a cylinder of oxygen gas, a tank of liquid nitrogen and a small test tube. To produce liquid oxygen, place the test tube in a bath of liquid nitrogen and blow oxygen gas into the test tube. Because liquid nitrogen is colder than the boiling point of oxygen, these conditions cause the oxygen to condense in the test tube. Liquid oxygen appears as a pale blue liquid.Learn More
Wind increases the rate of evaporation by removing air already laden with water vapor from above the water. The rate of evaporation depends, in part, on the existing level of water vapor in the surrounding air, since water vapor condenses at the same time as water evaporates in normal circumstances. Strong winds also move the water, expanding the amount of surface area available for evaporation.Full Answer >
The brand of kettle is needed to determine the exact amount of electricity used, but most kettles have an average wattage of 2 or 3 kilowatts or kW. If a 2 kW kettle is used for 2 hours then it has used 4 kWh.Full Answer >
Water is a liquid at room temperature because the hydrogen bonds within its construction are weak. These weak bonds hold water molecules together for mere milliseconds, which keeps water in a constantly liquid state at room temperature.Full Answer >
Any abstract concept, such as love or happiness, or type of energy, such as sound, light or heat, is not considered matter. Ideas, thoughts, time, speech and music are further examples of non-matter.Full Answer >