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No, energy does not have weight: energetic mass does. Energy is "the ability to perform work:" it is therefore not an object or a tangible real-world thing. When physicists talk about energy, they are talking about a quantity: the amount of work a system can perform.
Yes, according to Einstein's theory of special relativity, energy and mass are equivalent and can be converted into each other. This is described by the famous equation E=mc^2, where E is energy, m is mass, and c is the speed of light in a vacuum. So in a sense, energy can be thought of as having mass.
Note: That's just a theory, but today there are many new theories that contradict this in that they postulate that new Universes are being created and destroyed constantly, on a universe sized time scale. These universes can also collide so "new" matter/energy CAN be introduced in to our universe. Think black holes and white holes. Black holes suck matter/energy from our universe and white holes spit it out into new universes. So in essense the "big bang" was really just a white hole and every black hole in our universe is creating a new universe somewhere else. Or so that one theory goes.
False Statement: Under ordinary circumstances, there is no free interconversion of mass and energy. These events can occur only in the environment of tremendous heat and pressure which exists in a star, or, momentarily, in the detonation of a nuclear device.
That statement is completely false but I kept it to demonstrate how poorly the common man understands this concept. You yourself are converting energy to mass and mass to energy at this very moment. Any warm blooded being with some intellect should be able to figure that out.
A simple concept, is a good old fashioned fire in the fireplace. Wood burning turns to heat and light. Wood has more weight before being burned and there's not as much weight left in the ash, true there is some weight lost to out-gassing but it is negligible. So if, Weight equals mass times (the acceleration of) gravity and the weight of ash is less than wood with gravity being a constant, wouldn't you conclude that energy has mass.
No. Usually energy cannot have mass. Forms of energy such as light, heat, sound do not have mass. But energy can become mass. In the investigation of cosmic rays they have discovered that some reactions take place where energy becomes particles. They have discovered that a certain amount of gamma rays gets converted into two particles. The two particles that get created from energy are electron and positron which have a definite mass. When an electron and a positron-they are antiparticles to each other-combine their mass disappears and in its place a certain amount of energy appears. This process is known as annihilation.
Well, an electric current consists of moving charge carriers (usually electrons). And moving objects have increased kinetic energy, which according to Einstein's E = mc2 means they also have increased mass. In this way you can attribute a mass to electricity.
Easy answer: No. While potential and kinetic energy are posessed by objects with mass, the energy itself is not a physical object, and thus cannot have any physical properties: Location, length, density, or mass (etc).
The other answer: Yesss.... ish. According to Eistein's only famous equation, mass and energy are related. A body which gains enough energy (Kinetic. Potential energy is extremely subjective, and doesn't really count.) may have a measureable increase in mass, equal to the energy divided by the speed of light squared. However, this effect is absolutely negligable in any regular, day-to-day calculations. Unless something is travelling at almost the speed of light, or you are calculating atomic reactions, don't worry about it.
Energy is converted to mass every time your car takes you across town. As the car accelerates from its relative speed of zero, it gains mass because is gains kinetic energy (and gives up mass as it slows and loses kinetic energy). The amount of gain is so tiny at driving speeds as to be unmeasurable, but there is a gain in mass any time any mass is accelerated. At speeds approaching the speed of light, the mass gain is much more appreciable. You can calculate the amount of gain by manipulating the equation E=mc2: m=E/c2. Since c2 in the denominator is such an enormous number, you can see that the amount of mass gained for relatively small increases in kinetic energies will be very tiny.
Yes, by the formula E = mc2, just divide the energy by c2. In SI units, divide the energy (in Joules) by (300,000,000 m/s)2. That is, divide by 9 x 1016 m2/s2. Result will be in kilograms.
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Is it true that you can determine the kinetic energy of an object if you know mass and volume?
No, you cannot determine the kinetic energy of an object based solely on its mass and volume. Kinetic energy is calculated using the formula KE = 0.5 * m * v^2, where m is mass and v is velocity. Volume is not directly related to kinetic energy.
True or false Is an object's potential energy directly proportional to an object's mass?
False. An object's potential energy is not directly proportional to its mass. Potential energy is dependent on both mass and height, according to the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height of the object.
When energy balance in the body is positive body mass decreases true or false?
False. When energy balance is positive, it means that you are consuming more energy than you are expending, which leads to weight gain or an increase in body mass.
Does mass must be lost to produce energy?
In nuclear reactions, such as in nuclear power plants or nuclear weapons, a small amount of mass is converted into energy according to Einstein's famous equation, E=mc^2. This means that mass is not "lost" per se, but rather converted into energy.
Are matter and energy together are always conserved true or false?
True. According to the law of conservation of mass-energy, matter and energy can neither be created nor destroyed, only transferred or transformed from one form to another. So, in any isolated system, the total amount of matter and energy remains constant.
In a nuclear reaction mass must be lost to produce energy. true or false?
False. Both mass and energy are conserved.
Is it true that you can determine the kinetic energy of an object if you know mass and volume?
No, you cannot determine the kinetic energy of an object based solely on its mass and volume. Kinetic energy is calculated using the formula KE = 0.5 * m * v^2, where m is mass and v is velocity. Volume is not directly related to kinetic energy.
Mass must be lost to produce energy?
the answer is true. i took a test put true and got it right.
As per scientist new energy can not be generated it can only be converted. is it true?
For most situations, that would be true, and this limitation is described as the law of conservation of energy. However we also know that mass and and energy can be converted into each other under certain circumstances, so the broader law is conservation of mass-energy. Nuclear power is based upon the conversion of mass to energy.
Is it true that mass and energy repel each other Explain in details?
No. Mass and Energy are equivalent (E=mc2). The are different manifestations of one and the same thing.
Is kinetic energy increases as mass increases is that ture?
Kinetic energy for nonrelativistic speeds is 1/2 times mass times speed squared. If ONLY the mass increases, then the kinetic energy will also increase.
The principle of conservation of mass is true?
Yes, the principle of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. Mass is conserved through physical and chemical changes, meaning the total mass of the reactants equals the total mass of the products.
True or false Is an object's potential energy directly proportional to an object's mass?
False. An object's potential energy is not directly proportional to its mass. Potential energy is dependent on both mass and height, according to the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height of the object.
Can engergy be converted into mass?
Theoretically, yes. E=MCsquared is the equation of Einstein that covers the energy/mass equivalence. However, as far as I know as yet energy has not been transformed into mass, although the reverse is true.
Is this statement true or false When nuclear reactions happen the total amount of energy changes It is the mass plus energy before and after the reaction that are equal?
True. In nuclear reactions, the total amount of energy (mass-energy) remains constant before and after the reaction. This is described by the principle of mass-energy equivalence, as expressed in Einstein's famous equation E=mc^2, where E is energy, m is mass, and c is the speed of light.
True or false energy balance states that body mass stay constant when calories intake equals energy expenditure?
you pick.
When energy balance in the body is positive body mass decreases true or false?
False. When energy balance is positive, it means that you are consuming more energy than you are expending, which leads to weight gain or an increase in body mass.
