Energy

In physics, energy is a property of objects which can be transferred to other objects or converted into different forms, but cannot be created or destroyed. The "ability of a system to perform work" is a common description, but it is difficult to give one single comprehensive definition of energy because of its many forms. For instance, in SI units, energy is measured in joules, and one joule is defined "mechanically", being the energy transferred to an object by the mechanical work of moving it a distance of 1 metre against a force of 1 newton. However, there are many other definitions of energy, depending on the context, such as thermal energy, radiant energy, electromagnetic, nuclear, etc., where definitions are derived that are the most convenient.

Common energy forms include the kinetic energy of a moving object, the potential energy stored by an object's position in a force field (gravitational, electric or magnetic), the elastic energy stored by stretching solid objects, the chemical energy released when a fuel burns, the radiant energy carried by light, and the thermal energy due to an object's temperature. All of the many forms of energy are convertible to other kinds of energy, and obey the law of conservation of energy which says that energy can be neither created nor be destroyed; however, it can change from one form to another.

Package

Package may refer to:

Internal energy

In thermodynamics, the internal energy of a system is energy contained within the system, excluding the kinetic energy of motion of the system as a whole and the potential energy of the system as a whole due to external force fields. It keeps account of the gains and losses of energy of the system that are due to changes in its internal state.

The internal energy of a system can be changed by transfers: (1) as heat, (2) as work, or (3) with matter. When matter transfer is prevented by impermeable containing walls, the system is said to be closed. Then the first law of thermodynamics states that the increase in internal energy is equal to the total heat added plus the work done on the system by its surroundings. If the containing walls pass neither matter nor energy, the system is said to be isolated. Then its internal energy cannot change. The first law of thermodynamics may be regarded as establishing the existence of the internal energy.

The internal energy is one of the two cardinal state functions of the state variables of a thermodynamic system.

European Commission

The European Commission (EC) is the executive body of the European Union responsible for proposing legislation, implementing decisions, upholding the EU treaties and managing the day-to-day business of the EU. Commissioners swear an oath at the European Court of Justice in Luxembourg, pledging to respect the treaties and to be completely independent in carrying out their duties during their mandate.

The Commission operates as a cabinet government, with 28 members of the Commission (informally known as "commissioners"). There is one member per member state, though members are bound to represent the interests of the EU as a whole rather than their home state. One of the 28 is the Commission President (currently Jean-Claude Juncker) proposed by the European Council and elected by the European Parliament. The Council then appoints the other 27 members of the Commission in agreement with the nominated President, and the 28 members as a single body are then subject to a vote of approval by the European Parliament. The current Commission is the Juncker Commission, which took office in late 2014.

Florence School

The Florence School is located at 7902 North 36th Street in the Florence neighborhood of north Omaha, Nebraska. The first school in the Florence-area was built in what was then called Cutler's Park by Mormon pioneers in the late 1840s. The present-day Florence Elementary School was started in the late 1850s after the town of Florence was founded.

About

As early as 1868 the Florence School was used as an polling place in Nebraska state elections. A new building was erected in 1889 at the base of the bluff overlooking the Missouri River. In the 1890s, Julia Krisl became one of the first Czech principals in the city of Omaha while at the Florence School. The Florence School building was replaced in 1964. Florence B. Reynolds, a principal at the school in the 1920s, was a published scholar who examined labor relations with teachers.

References

External links

Coordinates: 41°19′51″N 95°58′09″W / 41.33083°N 95.96917°W / 41.33083; -95.96917