When I'm learning about energy. There is a sentence leave me hang.
Energy cannot be created nor be destroyed
So, if energy cannot be created, so how can we have energy in this world in the first place?
$\begingroup$
$\endgroup$
4
asked May 5, 2015 at 12:45
-
1$\begingroup$ Possibly related: http://physics.stackexchange.com/questions/3014/what-is-energy-where-did-it-come-from. $\endgroup$– honeste_vivereCommented May 5, 2015 at 12:46
-
$\begingroup$ I will be looking at it $\endgroup$– Simon-Nail-ItCommented May 5, 2015 at 12:48
-
$\begingroup$ Look at the duplicate (and other related questions, e.g.: physics.stackexchange.com/q/138972/50583, physics.stackexchange.com/q/137601/50583, physics.stackexchange.com/q/145124/50583). All of the answer are essentially: It's a number. It doesn't "come" from anywhere. $\endgroup$– ACuriousMind ♦Commented May 5, 2015 at 15:16
-
$\begingroup$ Cough. Energy isn't just a number. Matter is made from it. The mass of a body is a measure of its energy-content. $\endgroup$– John DuffieldCommented May 5, 2015 at 19:33
Add a comment
|