Energy transformation
hideIn physics, the term [energy] describes the amount of work which may potentially be done by forces within a system. Changes in energy in systems can only be accomplished by adding or subtracting energy from them, as energy is a quantity which is conserved. (Loosely, changes in the energy of systems also coincide with changes in the system's mass).
Energy in a system may be transformed so that it resides in a different state. Energy in many states may be used to do many varieties of physical work. Energy may be used in natural processes or machines, or else to provide some service to society (such as heat, light, or motion). For example, an internal combustion engine converts the potential chemical energy in gasoline and oxygen into heat, which is then transformed into the propulsive energy (kinetic energy that moves a vehicle. A solar cell converts solar radiation into electrical energy that can then be used to light a bulb or power a computer.
The generic name for a device which converts energy from one form to another is transducer.
For more information about Energy transformation, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with energy transfer
Scientists discover mechanism behind superinsulation
Dec 14, 2009 |
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(PhysOrg.com) -- Scientists at the U.S. Department of Energy's Argonne National Laboratory have discovered the microscopic mechanism behind the phenomenon of superinsulation, the ability of certain materials ...
Looking for the heartbeat of cellular networks
Dec 16, 2009 |
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Our cells' molecules form an intricate network of interactions. Today's techniques, however, can only be used to measure individual molecular reactions outside the cells. Since molecular concentrations are much higher in ...
Could Exotic Matter Provide an Infinite Source of Energy?
Sep 15, 2009 |
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(PhysOrg.com) -- Generally, scientists prefer to avoid the concept of perpetual motion. The idea of a machine that could produce movement that goes on forever, and using that movement to generate an endless ...
Scientists discover surprise in Earth's upper atmosphere
Space & Earth / Earth Sciences
Sep 10, 2009 |
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(PhysOrg.com) -- UCLA atmospheric scientists have discovered a previously unknown basic mode of energy transfer from the solar wind to the Earth's magnetosphere. The research, federally funded by the National ...
Cross-country runabouts -- immune cells on the move
Nov 17, 2009 |
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(PhysOrg.com) -- In order to effectively fight pathogens, even at remote areas of the human body, immune cells have to move quickly and in a flexible manner.
'Taco shell' protein: Orientation of middle man in photosynthetic bacteria described
Apr 13, 2009 |
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(PhysOrg.com) -- Researchers at Washington University in St. Louis have figured out the orientation of a protein in the antenna complex to its neighboring membrane in a photosynthetic bacterium, a key find ...
Research shows power of FRET-based approach for distinguishing among distinct states of proteins
Nov 30, 2009 |
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In the December 2009 issue of the Journal of General Physiology, Moss et al. report a comprehensive investigation employing Förster resonance energy transfer (FRET) to study the {gamma}-amino acid (GABA) transporter GAT1, ...
Think zinc: Molecular sensor could reveal zinc's role in diseases
Aug 30, 2009 |
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Scientists have developed a new molecular sensor that can reveal the amount of zinc in cells, which could tell us more about a number of diseases, including type 2 diabetes. The research, published today in ...
Live recordings of cell communication
Nanotechnology / Bio & Medicine
Aug 06, 2009 |
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Neurons communicate with each other with the help of nano-sized vesicles. Disruption of this communication process is responsible for many diseases and mental disorders like e.g. depression. Nerve signals travel from one ...
Explaining the Mystery of the Voyager
Feb 27, 2009 |
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With a new 3D-model for energy simulation scientists from Bochum, Germany, and Huntsville, USA, are studying the 'physical mystery' of the Voyager. Over 30 years ago the spacecraft detected particles in solar wind which were ...
Monitoring Cancer Cell Changes With Quantum Dots
Nanotechnology / Bio & Medicine
Jul 23, 2009 |
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One of the earliest events that changes a normal cell into a malignant one is known as deoxyribonucleic acid (DNA) hypermethylation, a biochemical alteration that inactivates critical tumor-suppressor genes. A team of investigators ...
White glow: Dye-doped DNA nanofibers emit white light
Nanotechnology / Nanomaterials
Jul 08, 2009 |
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(PhysOrg.com) -- Efficient energy transport plays an important role in the development of optoelectonic materials. The true masters of energy transfer via a hierarchical arrangement of different molecules are the photosynthetic ...
Energy simulation may explain turbulence mystery
Feb 26, 2009 |
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(PhysOrg.com) -- A new 3D model linking magnetic fields to the transfer of energy in space might help solve a physics mystery first observed in the solar wind 15 years ago.
Invention will help speed development of drug treatments for heart failure
Nov 23, 2009 |
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Research conducted by University of Minnesota scientists, in collaboration with Celladon Corporation, has led to the invention of technology to more rapidly identify compounds for the treatment of heart failure.
Scientists 'watch' as individual alpha-synuclein proteins change shape
Mar 16, 2009 |
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In an Early Edition publication of The Proceedings of the National Academy of Sciences (PNAS) this week, the researchers demonstrate the "alpha-synuclein dance" - the switching back and forth of the protein between a ben ...
