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svenskaTom
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Hi everybody, I hope this is the appropriate place to post this question:
A middle school physics book here in Sweden poses this question after giving a brief explanation of E = mc2:
For you Swedish speakers here is the original text:
So my answer is "Yes" to both since the additional potential (chemical) energy in the battery and the additional thermal energy of the hot iron adds to the respective masses. Forget that the additional mass is so small as to be unmeasureable, the book is talking about the implications of E = mc2.
The teacher says that the answer is "No" to both, the masses are the same in both cases.
Am I wrong? lol, so much for trying to help out with homework
thanks, Tom
A middle school physics book here in Sweden poses this question after giving a brief explanation of E = mc2:
According to Einstein's formula mass and energy are two sides of the same thing. Does this mean that:
a) a new battery weighs more than a battery run out?
b) a hot iron weighs more than a cold iron?
For you Swedish speakers here is the original text:
Enligt Einsteins formel så är massa och energi två sidor av samma sak. Innebär det att
a) ett nytt batteri väger mer än ett batteri som tagit slut?
b) ett varmt strykjärn väger mer än ett kallt strykjärn?
So my answer is "Yes" to both since the additional potential (chemical) energy in the battery and the additional thermal energy of the hot iron adds to the respective masses. Forget that the additional mass is so small as to be unmeasureable, the book is talking about the implications of E = mc2.
The teacher says that the answer is "No" to both, the masses are the same in both cases.
Am I wrong? lol, so much for trying to help out with homework
thanks, Tom