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US Urges Yemen’s Saleh to Step Down

May 27, 2011 Leave a comment

The United States, France and Canada have called for the resignation of Yemen President Ali Abdullah Saleh after demonstrations there threaten to turn itno outright civil war.

The mounting threat of civil war will put the crisis in Yemen high on the agenda of Group of Eight talks in the northern French seaside town of Deauville, with world leaders keen to get the matter discussed by the U.N. Security Council as quickly as possible, a European diplomat told Reuters.

U.S. Secretary of State Hillary Clinton, speaking in France, urged all sides to immediately cease violence, and a French foreign ministry spokesman told reporters at a G8 forum that France blamed the latest bloodshed on Saleh’s refusal to sign a transition deal.

“We call on all sides, on all sides, to immediately cease the violence,” Clinton told a news conference in Paris.

“We continue to support a united and stable Yemen and we continue to support the departure of President Saleh who has consistently agreed that he would be stepping down from power and then consistently reneged on those agreements,” she said.

More than 40 people have been killed since Monday in violence that threatens to spread into other areas of Sanaa.

Einstein Equation

October 4, 2010 Leave a comment

Given a small ball of freely falling test particles initially at rest with respect to each other, the rate at which it begins to shrink is proportional to its volume times: the energy density at the centre of the ball, plus the pressure in the direction at that point, plus the pressure in the direction, plus the pressure in the direction.

In 1905, Albert Einstein (1873-1955) suggested that mass and energy are equivalent while developing his special theory of relativity. The famous mass-energy equivalence relation states that

E=mc (squared)

 
where E is the energy equivalent or mass energy,
m is the mass of a body and
C is the speed of light.

It is difficult to show a simple logical path through which Einstein came to his equation. It was probably merely an hypothesis made by him from special relativity and Maxwell’s equations.

Read about it elsewhere on this site.

Recycling Plastics

September 29, 2010 Leave a comment

It is possible to recycle most common plastics made of polyethylene terephthalate (PETE). Examples include soda and water bottles, medicine containers, and many other common consumer product containers. Once it has been processed by a recycling facility, PETE can become fiberfill for winter coats, sleeping bags and life jackets. It can also be used to make bean bags, rope, car bumpers, tennis ball felt, combs, cassette tapes, sails for boats, furniture and, of course, other plastic bottles.
Other recyclable plastics include heavier containers that hold laundry detergents and bleaches as well as milk, shampoo and motor oil. They are often recycled into toys, piping, plastic lumber and rope.

Other Recyclable Plastics

Polyvinyl chloride, commonly used in plastic pipes, shower curtains, medical tubing, vinyl dashboards are also recyclable. Other plastics include polystyrene (Styrofoam) items such as coffee cups, disposable cutlery, meat trays, packing “peanuts” and insulation. They can be reprocessed into many items, including cassette tapes and rigid foam insulation.

Wind Energy

September 28, 2010 Leave a comment

Wind is caused by the uneven heating of the surface of our earth by the sun. The reason for this uneven heating is due to the different surfaces of our earth (land and water).

Air above land mass heats up more rapidly during the day time, while the air above water will heat up at a slower rate. As the air above the land rises and expands (due to heating), the cooler air above the water will rush in to fill its place. It is this process which causes the wind the blow, as the wind is the force of air rushing to fill a gap.

During the night, the process is slightly different, and instead of the air heating, the air cools. The air above land mass will loose heat more rapidly than the air above the water, resulting in air from the land rushing to fill air over the water.
Larger winds are generally found closer to the equator, as the air will generally heat and cool more rapidly, reducing in a greater wind force.

We are able to harness energy from the wind, and turn this into renewable electricity. Wind energy is reliable providing the correct location and most appropriate wind turbines design is researched.

The wind will blow as long as the sun shines down on earth. As more efficient wind harnessing technologies become available, we will be able to take advantage of this clean, renewable energy source.

Potential Energy

In 19th century, a Scottish engineer and physicist William Rankine made up the term potential energy.
According to physics, Potential Energy is the energy stored in a body or system due to its position. But the more formal meaning of potential energy is it is the energy difference between the energy of an object in a given position and its energy at a reference position. This energy exist when a restoring force acts upon at object and be likely restore it to a lower energy configuration.

For a much clear understanding, let’s say when a spring is being stretched to the left, it exerts a force to the right so as to return to its original and unstretched position. The action of stretching the spring needed energy to achieve, and the energy it took to stretch the spring is stored in the metal.

The law of conservation of energy states that energy cannot be created or destroyed, thus it cannot disappear but is stored as potential energy.
Potential Energy is closely linked to forces and there are several types of potential energy and they are coupled with a particular type of force.
1. Elastic Potential Energy. This is the potential energy of an elastic object that was deformed under tension. It occurs as an effect of a force when it tries to restore the object to its original shape.
2. Gravitational Potential Energy. This the potential energy related with the gravitational force. When an object falls inside a gravitational field, from one point to another point, the force of gravity will do positive work on the object, thus decreasing the potential energy. Factor such as its height, mass and the strength of the gravitational fields are affecting an object’s gravitational potential energy.
3. Electrical Potential Energy. By the virtue of its electric charge and other related forces, an object can have electric potential energy.
a. Electrostatic Potential Energy. It’s the energy of an electrically charged particle at rest in an electric field and the work that’s needed to move it from an infinite distance to its current location.
b. Electrodynamic Potential Energy. This is the energy created when a charge object are not at rest an also this is a result of magnetism where in a magnetic object has the capacity to move similar objects.
4. Nuclear Potential Energy. Referred to as the potential energy of particles within atomic nucleus. Also it is the work of strong nuclear force and weak nuclear force acting on the baryon charge.
5. Chemical Potential Energy. This is the potential energy during the rearrangement common positions of electrons and nuclei in atoms and molecules, such as those stored in fossil fuels.

Clean Energy

September 28, 2010 Leave a comment

It is the term describing what is thought to be environmentally friendly sources of power and energy. Typically, this refers to renewable and non-polluting energy sources.

Clean energy is energy that is produced without burning fossil fuels. Examples include wind, hydro-electricity and, controversially, nuclear power.

It also refers to natural energetic processes that can be harnessed with little pollution, such as anaerobic digestion, geothermal power, wind power, small-scale hydropower, solar energy, biomass power, tidal power, and wave power.

Mega power plant inaugurated in northern Germany

September 27, 2010 Leave a comment

Giant industrial manufacturer Conergy has inaugurated a 6 megawatt solar power plant in northern Germany today in Tarp near Flensburg. Member of the state parliament and chairman of the SPD energy committee Olaf Schulze, local investors and Conergy Germany boss Norbert Apfel officially launched operation of the solar park with the symbolic pressing of the red button. With this, Tarp supersedes the plant in Hörup, which previously held the record for the largest continuous solar park in northern Germany. Conergy had already worked together successfully with the same local investors.

On a site four times the size of the entire Hamburg football stadium, the park generates 5.5 million kilowatt hours of solar power each year, thus supplying around half of all Tarp residents.

Member of the state parliament Olaf Schulze stated in his inaugural speech: “With the two largest solar parks in northern Germany, Schleswig-Flensburg is a real solar pioneer and with it one of the greenest districts in the state. This is primarily also thanks to far-sighted investors who made green energy from the region for the region possible.”

The investor include the Abild family, Sven Haupthoff and the Johannsen family. Conergy has already enjoyed a success story dating back many years with the latter investor – both in free-field installations as well as on rooftops. In addition to the two parks, the Johannsens have installed seven power plants on roofs with Conergy, generating a total output of 1.5 MW.

Stephan Johannsen said: “We have fully counted on Conergy for years now. Following the first solar plant on our stable, we realized with the Hamburg-based company Hörup, which was previously northern Germany’s largest solar park. We wanted to continue this success.”

In Tarp, the Johannsen family relied on the proven Conergy system technology even more than in Hörup.

“A perfectly set-up system has been achieved through the well-matched interaction of our in-house components,” explains Conergy Germany boss Norbert Apfel. “Whether in major projects like here in Tarp, or in small to medium-sized rooftop installations – everyone benefits from Conergy’s system technology: the investors through enhanced profits, the residents as consumers receiving more clean solar power, and, of course, the environment.”

Interest in clean solar energy has also spread to Johannsen’s partner investors. Farmer and landowner Carsten Abild as well as his son Andreas were impressed by the huge success of the previous record-breaking park in the neighbouring town of Hörup.

“With Conergy, we knew we had a partner at our side who delivers the best “Made in Germany” quality reliably and from one single source. Justifiably, we are all extremely proud of the excellent results,” said Carsten Abild. A fitting celebration rewarded all those who had achieved such a great success: the farmer provided a suckling pig for the inauguration party from his own stock – naturally 100% “Made in Germany”.

SOLAR POWER

September 27, 2010 Leave a comment

Solar power

Solar power is power from sunlight. The Sun is the ultimate source of most of the world’s energy. We can use sunlight to heat water, warm our homes and make electricity using solar panels. Sunlight makes plants grow and makes wind and waves. Solar power is a renewable source of energy.

Sound
Sound is a way of transporting energy from one place to another.

Stores
Energy is stored in many places, e.g. in a lump of coal, in a battery or in a stretched rubber band.

Sun
The Sun is the source of most of the energy on Earth. Another name for our Sun is ‘Sol’, so light that comes from our Sun is called solar light. A solar panel uses the energy in this sunlight to make electricity.

Power station
A power station converts fuels or renewable energy sources into electricity. This often involves spinning turbines. For example, in a coal power station coal is burned to heat water until it boils. This produces jets of steam that push around the turbine blades to make electricity.

Power surge

A power surge is a sudden increase in the amount of electricity being used. For example, large power surges are caused when lots of people in the same country all use electricity at the same time to make a cup of tea during a TV advert break.

Natural gas

Natural gas is a fossil fuel. It is a gas that comes from sea creatures that died millions of years ago and it is non-renewable.We can burn gas to heat our homes and cook our food. Power stations can burn gas to make electricity.

Non-renewable

Non-renewable energy sources are not replaced as we use them. This means they will eventually run out. Fossil fuels such as oil, coal and gas are non-renewable. So is the uranium used in nuclear power stations.

Nuclear bomb

There are two types of nuclear bombs. They both do their damage by releasing massive amounts of energy. In a fission bomb energy is released as large atoms split in two. In a fusion bomb energy is released as pairs of small atoms stick together.

Nuclear fuel

Uranium is a nuclear fuel. It is a radioactive metal found in rocks. Uranium is used as fuel in nuclear power stations. Unlike most fuels, uranium doesn’t burn. Instead, energy is released when uranium atoms undergo fission. The waste from this fuel is dangerous and hard to get rid of.

Wave power

Waves are caused by the wind blowing across the sea and whipping it up. We can harness the energy in waves by using a turbine. Waves are a renewable energy source.

Wind power

Wind is caused by the Sun heating up different parts of our atmosphere. We can use a wind turbine to harness the energy in the wind. The wind is a renewable energy source.

Wood

Wood is a renewable energy source because we can grow more trees. Wood is an example of biomass. Wood can be burned to warm and light homes, cook food or even generate electricity in a biomass power station.

Tidal power

The energy in the moving tides can be used to make a turbine turn to make electricity. Tides happen mainly because of the gravity of the Moon pulling on the Earth’s oceans. The sea water moves up and down the shore every 12 hours. Tidal power is a renewable energy source.

Transfer

Energy can be transferred in four ways: mechanically, electrically, by radiation (sound and light waves) and by heating.

Turbine

Most power stations use turbines to make their electricity. The turbine is turned by pressure from steam, wind or even flowing water. It rotates a magnet inside coils of wire, which generates electricity to send to homes around the country.