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This is a tricky question. Quantum mechanicss shows us that all energy can be turned into mass and all mass into energy. To work out the equivilant mass of an amount of energy (or vice versa) simply use einsteins famous equation E= mc^2 - rearrange m = E/c^2 I do not know of any device that can directly "weigh energy".
What else can I help you with?
Bucket of water weighs two kiloswhat do you add to make it weigh half?
Assuming an ambient temperature of 293.15K then adding around 2608kJ of energy should do the trick nicely.
If you weigh 97.2 kg how many pounds do you weigh?
If you weigh 97.2 kg, you weigh approximately 214 pounds.
What should you weigh in Jupiter if you weigh 150 lbs on earth?
you would weigh 39.00
Would you weigh the same on mercury as you do on earth?
No. On Mercury you would weigh 37% of what you weigh on Earth.
If you weigh 100 pounds here how much will weigh on mars?
On Mars, you would weigh about 37.8% of your weight on Earth. So if you weigh 100 pounds on Earth, you would weigh approximately 38 pounds on Mars.
What energy conversion is going on in the body as energy from food is turned into fat?
You start to weigh more.
Why does a compressed spring weigh more than an uncompressed spring?
When a spring is compressed, it stores potential energy in the form of elastic potential energy. This added energy increases the overall mass of the spring, making it weigh more than when it is uncompressed.
How much does it cost to fix earthquake damage in a year?
no because energy is nothing its just energy it doesn't weigh anything
What are the benefits of LED tv's?
energy efficient weigh less than tube TVs
What does a kcal weigh?
A kilocalorie is not a measure of weight. It is a measure of energy
Does a battery weigh less after completely discharging?
No. A chemical reaction has taken place but mass is conserved.
Do charged batteries weigh more than discharged batteries?
Yes, charged batteries weigh slightly more than discharged batteries due to the additional mass of the stored electrical energy.
Two identical books the weigh the same one dropped at 5 feet the other at 2 feet which has the most potential energy?
The one at 5ft has 2.5 times the energy as the one at 2ft
Do caterpillar feces weigh the same as the leaf they ate?
No. Some of the material is used up in providing energy and materials for the caterpillar to grow.
Does a wire weigh more according to relativity if electricity flows through it?
Yes. The effect is almost completely negligible but the electrons have more kinetic energy in the wire and this extra energy translates into additional mass.
How does a bear weigh?
Bears can weigh more than 1,400 pounds.
If energy has mass and mass has weight do we weigh more when we have lots of energy?
The idea is not that energy 'has' mass. The idea is that mass and energy can be directly related to one another in an equation. Also, mass does not always have weight; you can weigh a mass only when the mass is in a gravitational field. Having lots of 'energy' has no affect on your weight. The above stated answer is partly wrong because Einsteins E=MC2 equation qualitatively states that energy in reality does have mass. It is only that the speed of light is so great in term's of numerical value that any change in energy would not effectively affect your total mass. However weight is simply a force so you can not say that if my mass increases on earth i would have the same weight as on the moon for the same weight.
