Work is the exertion of a force over a distance. Energy is the capacity to perform work. Power is the rate of work performed per unit time.
Notes:
Students may find a basic physics text helpful in obtaining these definitions. "Work" is a difficult concept to precisely define, especially for students unfamiliar with basic physics. Technically, it is the vector dot-product of force and displacement, meaning that work equals force times distance only if the force and distance vectors are precisely parallel to each other. In other words, if I carry a 10 kg mass (lifting up against the tug of gravity) while walking parallel to the ground (not going up or down), the force and displacement vectors are perpendicular to each other, and the work I do in carrying the mass is zero. It is only if my force is directed precisely the same direction as my motion that all of my effort is translated into work.

On July 3, 1899, Tesla discovered terrestrial stationary waves within the earth. He demonstrated that the Earth behaves as a smooth polished conductor and possesses electrical vibrations. He experimented with waves characterized by a lack of vibration at points, between which areas of maximum vibration occur periodically. These standing waves were produced by confining waves within constructed conductive boundaries. Tesla demonstrated that the Earth could respond at predescribed frequencies of electrical vibrations. At this time, Tesla realized that it was possible to transceive power around the globe.
The investigations of atmospheric electricity involved observing lightning signals via his receivers. Tesla stated that he observed stationary waves during this time. Tesla conducted experiments contributing to the understanding of electromagnetic propagation and the Earth's resonance. It is well documented (from various photos from the time) that he lit hundreds of lamps wirelessly at a distance of up to twenty-five miles (40 km). He transmitted signals several kilometres and lit neon tubes conducting through the ground. He researched ways to transmit energy wirelessly over long distances (utilizing the ionosphere and the ground's telluric currents via transverse waves, to a lesser extent, and, more readily, longitudinal waves). – PesWiki


“I had expected his approval and was pained and surprised. But the next day he returned and gave me a better opportunity for explanation of the advances I had made and of the true principles underlying the system I had evolved. Suddenly he remarked with evident astonishment: “Then you are not making use of Hertz waves?”
“Certainly not,” I replied, “these are radiations. No energy could be economically transmitted to a distance by any such agency. In my system the process is one of true conduction which, theoretically, can be effected at the greatest distance without appreciable loss.”
The Hertz wave system is in many respect the very opposite of this. To explain it by analogy, the piston of the pump is assumed to vibrate to and fro at a terrific rate and the orifice thru which the fluid passes in and out of the cylinder is reduced to a small hole. There is scarcely any movement of the fluid and almost the whole work performed results in the production of radiant heat, of which an infinitesimal part is recovered in a remote locality. However incredible, it is true that the minds of some of the ablest experts have been from the beginning, and still are, odsest by this monstrous idea, and so it comes that the true wireless art, to which I laid the foundation in 1893, has been retarded in it development for twenty years. This is the reason why the “statistics” have proved unconquerable, why the warless shares are of little value and why the Government has been compelled to interfere.
The exact law will be readily understood by reference to Fig 9, in which a transmitting circuit is shown connected to earth and to an antenna. The transmitter being in action, two effects are produced: Hertz waves pass thru the air, and current traverses the earth. The former propagate with the speed of light and their energy is unrecoverable in the circuit. The later precedes with the speed varying as the cosecant of the angle which a radius drawn from any point under consideration forms with the axis of symmetry of the waves. At the origin the speed is infinite but gradually diminishes until a quadrant is traversed, when the velocity is that of light. From there on it again increases, becoming infinite at the antipole. Theoretically the energy of this current is recoverable in its entirety, in properly attuned receivers.
Michael V wrote:upriver,
Faster-than-light entanglement: Can you explain this in detail please?
The weightlifter is doing exactly the same as the floor, what additional complication are you seeking?
Michael
upriver wrote:Michael V wrote:upriver,
Faster-than-light entanglement: Can you explain this in detail please?
The weightlifter is doing exactly the same as the floor, what additional complication are you seeking?
Michael
No additional complications... I was tired when I wrote that..
"Experimental results have demonstrated that effects due to entanglement travel at least thousands of times faster than the speed of light.[23][24] In another experiment, the measurements of the entangled particles were made in moving, relativistic reference frames in which each respective measurement occurred before the other, and the measurement results remained correlated.[25][26]"
http://en.wikipedia.org/wiki/Quantum_entanglement
^ D. Salart, et. al. (2008). "Testing the speed of 'spooky action at a distance'". Nature 454 (7206): 861–864. doi:10.1038/nature07121. PMID 18704081.
Faster-than-light speeds in tunneling experiments: an annotated bibliography
http://www.aei.mpg.de/~mpoessel/Physik/ ... ngftl.html
The whole topic seems to be a bunch of unicorn poo to me.
upriver wrote:Photons are massless(unless EU is saying that photons have mass). And they have, hold or are made of energy. Massless energy?
upriver wrote:.... because matter is a process... Matter is not static, it will eventually decompose......
Michael V wrote:upriver,upriver wrote:Photons are massless(unless EU is saying that photons have mass). And they have, hold or are made of energy. Massless energy?
So you have entirely abandoned science and logic?. From here the answers are easy, they are anything you wish them to be.
"Energy" started to become included into the "ideas" of some theorists in the second half of the 19th century. Prior to this it was clearly understood that "energy" was a unit of work. Your massless non-material energy substance has other names: magic, fairy dust, god, etc., In short it is the essence and basis of all superstition. Your acceptance that light, or that anything, may be massless is a further indication that you are searching for spiritual answers to questions of physical reality. Acceptance of the concept of "massless" demonstrates a willingness to replace science with spiritualism and ends with a belief in back holes, big bangs, electromagnetic light and electromagnetic gravity. Mass is the property of interaction. It is, or at least it is directly proportional to, and therefore equivalent to. the amount of matter that an object contains.
upriver wrote:.... because matter is a process... Matter is not static, it will eventually decompose......
What evidence or theory do you have that leads you to this conclusion? By what process can or does matter decompose? Protons are estimated to be stable for at least 21,000,000,000,000,000,000,000,000,000 years, "The experimental lower bound for the electron's mean lifetime is 46,000,000,000,000,000,000,000,000 years, at a 90% confidence level", the Earth is likely no older than 5,000,000,000 years old. I am guessing that you are younger than the Earth, so your opportunity to establish evidence of decomposing matter, is surely limited.
Attempts, such as Wal Thornhill's, to make "electrical" the basis of all force and existence are nothing more than religious agenda. Acceptance of the concepts of "energy substance" and "massless" is a withdrawal from scientific enquiry in order to hide in the comfort of superstition that has so beset the scientific endeavour for more than the past 100 years.
Work is Force x Distance. The definition is clear and unambiguous. I will grant you, the nature and operation of the universe is not so clear.
Michael
Michael V wrote:Entanglement - are there two possibilities?
1) Two objects are brought together and then separated in such a way that certain physically measurably properties of the two objects are opposite.
2) Two objects are brought together and then separated and upon measurement of a physically measurable property of one object, it chooses to communicate to the other object, instantaneously and over great distance, the value of the measurement such that the second object chooses to instantaneously alter its corresponding physically measurable property so that it is the opposite of that value measured from the first object.
The received wisdom is that the value measured from the second object is dictated by the value measured from the first object. Perhaps we may make the measurement before the objects are joined and then again before they are separated, but oh dear the process of measurement of any given physically measurably property can affect the object to such a degree that anyphysically measurable property, including the property just measured, can be altered. In other words, there is no way of knowing at what point and by what process the "entanglement" of physically measurable properties became enforced. Unfortunately, when considering the two possibilities given above, Mr Occam was not consulted, neither was sense and reason. All hail, lunacy and funding, the central pillars of physical science.
Michael
Mass is a property of what?
Return to The Future of Science
Users browsing this forum: No registered users and 1 guest