It requires energy to hold a magnet on the refigerator door. Since the magnet is losing energy it must also be losing mass according to E=mc^2.
Am I correct?
2007-05-07 17:21:57 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Work is force times distance, so it only requires work when the magnetic is moved. Furthermore, it's the person moving the magnet doing the work. As another example, it requires work to compress a spring, but not to keep it compressed in a vise once it is.
2007-05-08 15:33:53 · answer #1 · answered by Dr. R 7 · 0⤊ 0⤋
It depends on what they're made of.
Any ferrous metal can hold a magnetic charge, but loses it over time. My "permanent magnet" alternator in my '62 motorcycle no longer works.
Magnetite is a material that won't lose a significant amount of it's charge in your lifetime.
.
2007-05-07 17:31:22 · answer #2 · answered by s2scrm 5 · 0⤊ 0⤋
A magnet creates a magnetic field by having the magnetic moments of its electrons aligned in the same direction. this causes other ferromagnetic materials to try and align their magnetic moments to oppose the effect of the magnet and give and overall force of zero at every point in the magnetic field.
2007-05-07 17:30:50 · answer #3 · answered by Josh 3 · 0⤊ 0⤋
No, a magnet does not lose mass over time. That is also a severe misinterpretation of Einstein's equation.
2007-05-07 17:28:17 · answer #4 · answered by inconsiderate_ass 3 · 1⤊ 0⤋
No. It is just because the molecules are no longer lining up the way they were when the magnet was made.
2007-05-07 17:25:13 · answer #5 · answered by Clown Knows 7 · 0⤊ 0⤋
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2016-10-04 13:25:56 · answer #6 · answered by ? 4 · 0⤊ 0⤋
No, it is gaining energy through a symbionic relationship with refrigerator paint.
2007-05-07 17:26:38 · answer #7 · answered by Texas Cowboy 7 · 0⤊ 0⤋
no, the formula has a flaw - speed, the fridge magnet isn't moving.
2007-05-07 17:25:44 · answer #8 · answered by Pazuzu 3 · 2⤊ 0⤋
NO...more likely the opposite>>>the speed of travel reducing...
2007-05-07 17:29:59 · answer #9 · answered by each may believe differently 3 · 0⤊ 0⤋
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2007-05-07 17:24:47 · answer #10 · answered by KicK IT 1 · 1⤊ 0⤋