KIND OF ENERGY by Rosanna Saprio

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r_saprio1 — 2017-10-14 14:40:00 UTC

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r_saprio1 — 2017-10-15 17:27:12 UTC

Nuclear energy is energy in the nucleus (core) of an atom. Atoms are tiny particles that make up every object in the universe. There is enormous energy in the bonds that hold atoms together. Nuclear energy can be used to make electricity. But first the energy must be released. It can be released from atoms in two ways: nuclear fusion and nuclear fission. In nuclear fusion, energy is released when atoms are combined or fused together to form a larger atom. This is how the sun produces energy. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Nuclear power plants use nuclear fission to produce electricity.

r_saprio1 — 2017-10-15 17:30:08 UTC

Fission and Fusion

There are two fundamental nuclear processes considered for energy production: fission and fusion.

Fission is the energetic splitting of large atoms such as Uranium or Plutonium into two smaller atoms, called fission products. To split an atom, you have to hit it with a neutron. Several neutrons are also released which can go on to split other nearby atoms, producing a nuclear chain reaction of sustained energy release. This nuclear reaction was the first of the two to be discovered. All commercial nuclear power plants in operation use this reaction to generate heat which they turn into electricity.
Fusion is the combining of two small atoms such as Hydrogen or Helium to produce heavier atoms and energy. These reactions can release more energy than fission without producing as many radioactive byproducts. Fusion reactions occur in the sun, generally using Hydrogen as fuel and producing Helium as waste (fun fact: Helium was discovered in the sun and named after the Greek Sun God, Helios). This reaction has not been commercially developed yet and is a serious research interest worldwide, due to its promise of nearly limitless, low-pollution, and non-proliferative energy.

Click here to see animations of fission and fusion reactions.

ELECTRIFICATION

r_saprio1 — 2017-10-27 13:23:00 UTC

All bodies or materials are composed of atoms, and these are made up of smaller particles called electrons, protons and neutrons.

Protons and electrons carry electric charge of the same intensity (value) but of opposite signs, in which the positive charge is the proton and the electron, the negative charge.

In atom in its natural state there is a predominance of electric charge by the number of protons equals the number of electrons, which makes it neutral. However, when he loses or gains electrons we say it is electrified.

Positively charged body : If a body has a greater amount of positive charges, we say that has lost electrons, and thus it is positively electrified.

Note: A body never win protons, because it is located in the central part of the nucleus of the atom.

Negatively charged body : It is when a body has more negative charges than positive, ie, when gains electrons

Attraction of bodies : When particles are electrified with loads of opposite signs, attract. Example :

Repulsion of bodies : When particles are electrified with loads of equal signs, repel.

Example :

Electrification of processes

Frictional electrification

When two bodies are initially neutral rubbed, and is electrified, because of the friction caused a body will be positively charged and the other negatively charged.

Experiment : Take a small piece of paper and a pen! Next, arthritis Pen in Her Hair and After Aproxime of Paper!

Electrification by contact : When two bodies (one electrified and one initially neutral) contact, the neutral body gets the same load electrified.

Electrification by induction : That's when the electrification of an initially neutral body (induced) occurs by simple approximation of a charged body (inductor), without making contact between bodies. The armature must be connected to earth or to a larger body that can provide you with electrons or that it receives in the flow caused by the presence of the inducer.

SOURCES OF ENERGY NOT RENEWABLE 5

luigi_cavallaro05 — 2017-11-02 09:19:42 UTC

NATURAL GAS:Natural gas is a gas produced by the anaerobic decomposition of organic matter.
In nature it is commonly found in the fossilized state, along with oil, coal or alone in natural gas deposits.

URANIUM:Uranium metal is the heaviest element present in nature. Uranium stones are present everywhere: in the rocks, in t

Non-renewable energies are those sources of energy that come from resources that tend to run out, becoming too costly or too polluting for the environment, as opposed to renewable ones, which naturally reintegrate in a relatively short period of time. Some non-renewable energies are the
fossil fuels:
-coal
-petroleum
-natural gas
-uranium
-plutonium

FOSSIL FUELS:These fossil fuels are derived from the transformation, naturally occurring in millions of years, of organic matter, underground burial over geological erasms, in more stable and richer carbon molecules.

COAL:Coal (or fossil carbon) is a fossil fuel or sedimentary rock extracted from underground, open or artificially produced mines. Coal formation dates back to about 345 million years ago when a warm, humid climate and high CO2 concentration favored the growth of giant trees: their death (favored by floods) and subsequent degradation, assisted by fungi and bacteria, have led to those we know as fossil fuels. More stable and rich in carbon.

PETROLEUM:Oil is a flammable liquid. It is composed of a mixture of various hydrocarbons, solely hydrogen and carbon substances.Is extracted for drilling on mainland or in the sea.

he soil, in the waters, even in living organisms.

PLUTONIUM:Plutonium is the chemical element of atomic number 94. Its symbol is Pu. Pure plutonium is a silvery metal, but yellowing when oxidized. Plutonium undergoes a volume contraction as the temperature rises.

luigi_cavallaro05 — 2017-11-02 10:57:06 UTC

RENEWABLE ENERGIES4

simonacavallaro04 — 2017-11-03 10:37:33 UTC

Renewable sources of energy are continually renewed and therefore are inexhaustible.Are sources of renewable energy, or even alternative sources:
-THE SUN
-WIND
-WATER
-BIOMASS
-TIDES
-INTERNAL HEAT OF THE EARTH

THE SUN: Solar energy is the energy associated with solar radiation and represents the primary source of energy on Earth.From this energy
comes almost all the other energies available to man.

the solar energy is exploited to produce hot water, using solar panels.
Solar power can be transformed into electricity by building solar power plants. This process takes place in photovoltaic plants and in solar thermal plants.

THE WIND:Wind energy is the energy of the wind. It is possible to exploit this energy through the use of electric power generators.

THE WATER:Water power is the most exploited. In hydroelectric power stations, the kinetic energy of a water drop puts on motion turbines and is transformed into mechanical energy into electricity.

BIOMASS:Biomass refers to a set of animal or vegetable organisms present in a certain quantity in a given environment such as aquatic or terrestrial.Biomasses are important because they allow the disposal of waste.

TIDES:the exploitation of tidal water is at the level of experimentation.

INTERNAL HEAT OF THE EARTH: Geothermal energy is the energy generated by geological sources of heat. It is based on the exploitation of Earth's natural heat.

THE TYPES OF ENEGY)2slide

carolinadimaio04 — 2017-11-03 10:55:32 UTC

KINETIC ENERGY:In physics, the kinetic energy of an object is the energy that is due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when it decelerates from its current speed to a state of rest.The unit of kinetic energy is the joule.

POTENTIAL ENERGY: in physisc,the potential energy is the energy that is acquired by a quiet body brought to a certain height from the ground.

MECCANIC ENERGY: in the physical sciences, mechanical energy is the sum of potential energy and kinetic energy. If an object moves in the opposite direction of a conservative net force, the potential energy will increase and if the velocity of the object changes, its kinetic energy also changes.

ENVIRONMENTAL PROBLEMS

rosariateo70 — 2017-11-03 14:29:05 UTC

The industrial development of our society has led in this last decade to an ever-increasing consumption of fossil fuel energy resources and a boost in the consumption of nuclear energy.
in particular two issues are of concern :

the limited nature of non-renewable energy resources on Earth;
the growing environmental pollution associated with production and consumption of energy.

the effect shuts it is a natural phenomenon that consists in the ability of the atmosphere to hold back the heat radiated by the terrestrial surface preventing the dispersion of it in the space; this is possible for the presence in the atmosphere of aqueous vapor and some gases what the carbonic anhydride
In the last 100 years the middle temperature on the Earth has been climbed and has provoked the breakup of the glaciers and the raising of the sea, l amplification of arid and desert zones, strong variations of the climate with devastating effects which you violate cyclones and tsunami . To such intention is held to Kyoto a lecture on the climate that hocks the signatory countries to contain within the preset limits l 'issue of gas shuts .

Greenhouse

rosariateo70 — 2017-11-03 16:06:22 UTC

Principle of communicating vessels:

rosariateo70 — 2017-12-02 09:13:44 UTC

The principle of communicating vessels is the physical principle according to which a liquid contained in two or more containers communicating with each other, in the presence of gravity, reaches the same level originating a single equipotential surface.

Potential difference :

In physics, the difference in potential between two points in a region of space in which there is a conservative vector field, is the difference between the value of the potential of the field between the points; that is, it corresponds to the work necessary to move a point object subject to the action of the field from the point where the field potential is lower than the second point. This is a quantity that is sometimes defined in the absence of a reference potential, ie we are interested in the relative value of the difference between the field potential in two points, neglecting the potential difference with respect to the field source (for example in a circuit the difference in potential at the head of a component is often considered instead of that at the head of the generator).

PARALLELISM BETWEEN COMMUNICATING VESSELS AND POTENTIAL DIFFERENCE:

1) To run the water in a pipe it is necessary that the liquid is at different levels so that a volume of water placed on the two levels has a difference in potential energy.

2) To make the charges move, a difference in electrical potential is necessary: the positive charges follow the «potential descent» while the negative ones go up again.