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Home Q & A Board Science-Related Homework Help Physics
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Mpron Mpron
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6 years ago
Any change of the energy of a system occurs because of
 a. energy transfer across the boundaries of the system.
  b. combustion of fuels within the system.
  c. radioactive decay of elements within the system.
  d. all of the above. e. only (b) and (c) above.
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HaileyianHaileyian
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6 years ago
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Mpron Author
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6 years ago
Smart ... Thanks!
julymontalvo
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Yesterday
Good timing, thanks!
alpheratz
wrote...

2 hours ago
Thanks
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