Question:
is it possible to weigh energy?
?
2010-10-29 04:34:12 UTC
energy is electrons and electrons must have some type of weight.........or? Please give me an answer that helps me further. Thanx
Five answers:
TM
2010-10-29 05:02:24 UTC
Weight of an object is the force with which the object is pulled down by earth, so you can only have the weight of material particles that have mass and are attracted by gravity .



Energy on the other hand is the ability to do work, in a body; like a car moving at a speed of 100 miles an hour has energy, it can hit an object and make it move, thus doing work, or a cell has chemical energy that it converts into electricity. It not a 'material body' that can be 'weighed', it is a sort of property of the object that possesses it, because of its speed, position or state.



While electrons are particles, having mass and charge and are one of the fundamental particles that make up everything around us. Electrons do have energy because of their speed and can be converted to energy as they have mass, but so can any other particle like proton, neutron and even you and me (of course we are made of these particles only) but electrons themselves are not energy. Electrons having mass are affected by gravity and hence can be weighed.



Electrons have a mass of 9.1 * 10^ -31 kg and hence have a weight of 89.18 * 10^ -31 newtons
TheCat
2010-10-29 07:34:45 UTC
Well, energy can come in countless different forms. As heat, as light, as a current through a wire, as mass, as a speeding car, ...



What's special is that mass is just another form of energy. You have probably heard of E = mc^2, but what does it mean? It means that anything with mass actually contains an enormous amount of energy, and the conversion between the two is the square of velocity of light. In fact, it's possible to use a system of units in which distance and time are measured in the same units, so that c = 1. In that system, E = m. They're the same.



Conversely, energy can be converted into mass. In the interior of the Sun, hydrogen nuclei (protons) are being pushed together to form helium nuclei. The resulting helium is lighter than the hydrogen with which you started, the rest of the mass is converted into heat and light.



Going a little more mundane, because E=mc^2, it's also true that m = E/c^2. So a hot potato will weigh more than a cold potato, because it holds more energy. Let's assume you put a cold potato in the microwave oven for a minute at 1000 Watts. That'll radiate about 60 kiloJoules of energy into the potato. Using m = E/c^2 this gives us a mass difference of m = 0.667590034 nanograms. Such a small weight difference would be practically impossible to measure on something as big as a potato.



So to answer your question: Yes, it is possible, and with carefully set up experiments it's possible to check the equivalence between mass and energy. But in more mundane situations, the weight differences are so small that there is no practical way of measuring them, besides inferring them from energy differences.
anonymous
2010-10-29 07:10:22 UTC
Energy does not have weight. Energy is not electrons. Energy may be the movement of electrons, or it may be carried in photons: particles of energy.



Cars carry energy too, for example, when they are moving,. But you would not think of weighing a car to find the weight of energy.



When you look at electric current, as it is most commonly used; that is, AC, and look at they way the electrons move in a wire, in a typical, say, household lamp, the actual electrons move back and forth a few millimeters. That is all. Really, there are no 'new' electrons. just the same ones, moving back and forth.



The energy: the work done, is by the movement, not by the electrons per se. Just as when you saw wood, it is the movement that does the work. On average, the saw does not move.



Matter is not "made of energy", and it IS not energy. Under extreme circumstances, it is possible to convert them. Wood may be able to produce heat, but left alone in space for a few billion years, there will be no sign this heat. Atoms and photons generally have long, happy and very independent lives in our universe.
someonewhoisnot
2010-10-29 04:44:45 UTC
You cant buy a weigher for it, but it can be inferred by experimental means.

Problem with reality is that there is a degree of uncertainty as to how small things can be in reality itself. Depends on what God has done to configure this plane - this is called the Heisenberg uncertainty principle. How small is the smallest distance allowed? How small is the smallest movement possible? pixels on a screen for instance - you can only move one square...not half or a quarter. Does reality have limits to its "resolution"? if it does, the size, WEIGHT, minimum moveable distance will apply.



Is it possible to weigh energy? yes

Is it possible to believe that the answer is perfectly accurate? sadly no.



Things get weird when things get hyper-small.



As an analogy, its like comparing the power of stadium lights to desk lights. The designs are totally different as large power has unusual problems that small powered things like lamps and stuff dont have. Further, think of it as the speed of light...time stops right? things break down at that speed when the speed is massive...so, in reality, things too big and too small make average things different.
anonymous
2010-10-29 04:47:57 UTC
no, u cannot weigh energy, but you can measure it.

energy is not electrons.

matter is just another form of energy.

E=mc2

this shows that matter is related to energy.

electrons are really tiny particles, usually represented as a point, so they are essentially massless, nut yes, they do have some energy.

google it up, please


This content was originally posted on Y! Answers, a Q&A website that shut down in 2021.
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