Fresh water freezes at 32 degrees Fahrenheit, which is 0 degrees Celsius and 273.15 degrees on the Kelvin scale. Seawater freezes at a slightly lower temperature than fresh water due to its high salt content.Know More
Although water has standard freezing temperatures, scientists have found water in its liquid form at temperatures below -40 degrees Fahrenheit. As water grows colder, its molecular structure changes shape, which alters the density of the water and increases its heat capacity. At -55 degrees Fahrenheit, the molecules become tetrahedrons, and that difference in structure changes the way the molecules react to heat and cold.
All things freeze at 0 degrees Kelvin, also known as Absolute Zero. That temperature represents a total absence of heat, and molecular motion stops.Learn More
Plutonium naturally forms in the heart of a star undergoing supernova, along with virtually all of the heavy elements in the universe. It is not found on Earth due to its instability. The most stable isotope of naturally occurring plutonium has a half-life of only 82,000,000 years and is exhausted well before it can be taken up in planetary formation. However, humans have been able to artificially create plutonium.Full Answer >
Workers involved in the manufacturing and production of polyurethane are at the greatest risk of being exposed to the effects of the chemical. Polyurethane is made from a reaction of polyol with diisocyanates or polymeric isocyanate. Diisocyanates can cause allergic reactions and irritations to the skin, nose, throat and eyes.Full Answer >
An element is a description of a type of atom, so a single atom is representative of an element but not an element itself. "An atom" refers to a physical entity; "an element" refers to a type of atom.Full Answer >
Gas comes from crude oil. The remains of organisms that lived on Earth hundreds of millions of years ago were eventually covered with sediment and rock. The pressure and heat of the Earth caused the remains and sediment to combine and create liquid hydrocarbon, or crude oil.Full Answer >