does energy have mass or weight?

Answer 1

One of the best questions ever asked !! :-)
There are theories that energy could have mass, mass of such a tiny amount we can't measure it yet. Or maybe it's mass is in another additional dimension.

After our nowadays knowledge, I should answer, no, energy has no mass, because it can be converted in mass and vice versa ... however, I am not so sure about this. Look at the latest string theories and you know why.

Answer 2

Everything is in some manner interconnected. Let's take a look at the smallest units of energy and see if they have the potential of having "mass or weight".

What we will consider is the physics trilogy. This is because these values describe the basis of our universe. If we are able to find energy having mass or weight, it will be because of these equations.

E = mc2, m = E/c2, and c2 = E/m are the values we are interested in. In particular we will look at the last, which is that for a field of gravity, or that of physical time. This equation describes the force of gravity as being a relationship between that of mass and energy (heat). Stephen Hawking in "A Brief History of Time," page 92, paragraph 3, states; "Like light, gravitational waves carry energy away from the objects that emit them.". The reason for this quote is to show that the force of gravity is a particular form of energy - it appears it is that of "h" (Plank's constant). This is the smallest form of energy presently realized. This form of energy is able to "attract" electromagnetic energy, but is, itself, unaffected by other gravitational fields. So, energy, electromagnetic, must posess a factor that is greater than the graviton, and this a person could call "mass". Then, electromagnetic energy driectly forms into negative and positive electrons (mass) when a high energy photon enters near the center of an atom.

This stuff is sorta up for grabs. Its like the planet Pluto. Some call it a planet yet and some don't. Our naming of it does not change what it is. You have to determine for yourself what mass and energy are according to your understanding.

Answer 3

Einstein's formula E=mc^2 gives a relation between energy E and mass m. c is the speed of light.

So, given something that has mass, let say weight 5 kg, then to know its equivalence in energy, just multiply by c^2 and you get the number you want.

It just means that mass (what you call weight) and energy are the same thing and can be interchanged.

A photon does not have mass, but it has nonzero energy E because it moves at the speed of light (it has kinetic energy).

Answer 4

As previous readers have noted, energy may be converted into mass and mass into energy with an equivalence relation e=mc^2. Mass is "bottled" energy; energy which does not a velocity equal to the speed of light. Weight is a measurement of mass affected by an acceleration field (i.e. of which a gravitational field is a special kind). Although, light, commonly acknowledged as being massless, is affected in its pathway by a curvature in response to a local gravitational field. By this criteria, i.e. response to gravitational field, one must conclude that the presence of energy, whether in a mass form or not, must have weight. However, one cannot weigh pure energy on a static scale while mass can be so weighed.

Answer 5

Energy has neither mass nor weight . But mass can be converted to energy and vice -e-versa.. This is the present concept of energy.

Answer 6

Energy is purely existence of radiation, and can be felt, conceptualized,or be assesed, but is not a substance and therefore is devoid of mass or weight. Take one example: At the time of death the constituent part of our body what is called substance remains, however the constituent part called energy defies laws of gravity and ascends or even spreads anywhere,everywhere. Light is energy,and is radiated from sun towards the earth or other planets where principle of gravity operates, but it is also present in the space where no gravity exists. We know, there is no gravitational pull in so called space.

Answer 7

I have never heard of energy having weight or mass.

The creation of energy can come from the conversion of mass, but you must bear in mind that you are crossing over universal "force" boundaries.

Mass is measured by a gravitational force we refer to as weight. Energy, in it's many forms, may be measured by electromagnetic units of force such as volts, amps, tors, or units of heat, light, pressure, etc., none of which have any basis for measurement in ounces, pounds, kilograms and such.

Answer 8

This is a very good question.
For my opinion , energy must have a mass.

Answer 9

mass. E=mc^2

Answer 10

Photons are massless particles. So no.