Iron, nickel, cobalt and gadolinium are naturally ferromagnetic elements. Common usage of the term "magnetic" refers to this form of magnetism. Other elements are capable of forming magnetic compounds, but are not magnetic in their pure states.
Powerful rare earth magnets are referred to by the names of their component rare earth elements, but these elements are not ferromagnetic on their own. Neodymium magnets are the best-known type of rare earth magnets and composed of an alloy of neodymium, iron and boron. Samarium magnets consist of an alloy of samarium and cobalt. These are useful at high temperatures where neodymium magnets would lose their ferromagnetism.
Other elements that are naturally nonmagnetic can undergo laboratory-induced ferromagnetism. When lithium gas is supercooled to near absolute zero, it exhibits ferromagnetism. This is the only recorded instance of a magnetic gas. While they are solids, not gases, compounds formed from actinide series elements exhibit similar magnetic properties when cooled.
The most powerful naturally occurring magnet is a compound, not a pure element: magnetite, or iron oxide. Naturally magnetized pieces of magnetite are called lodestones and have been used for their magnetic properties since ancient times. Large deposits of magnetite are magnetic enough to interfere with compasses.Learn More
Hydrostatic law is a principle that describes the weight of a fluid on a surface or the amount of pressure exerted at an exact point. It is also used to calculate change in pressure over a given change in altitude or atmospheric mass across a particular area.Full Answer >
Kids can easily make an electromagnet using nothing more than 5 feet of copper wire, a large iron nail, a rubber band, sandpaper and an AA battery. These objects are readily available around the house, and there are few risks associated with making a small electromagnet. Making electromagnets will allow children to see basic science concepts in person.Full Answer >
The most basic law of magnetism is that like poles repel one another and unlike poles attract each othe.r This is easily observed when attempting to place two magnets with the same pole together. However, there are also some additional rules for magnetism.Full Answer >
Projects that incorporate magnetic levitation include transportation engineering projects, such as magnetically levitated trains, environmental engineering projects, such as wind turbines, and biomedical engineering projects, such as heart pumps. Magnetic levitation refers to suspending an object with magnetic fields to negate gravity.Full Answer >