Physics for All 1 - Chapter 9: พลังงาน
I think this section would be the easiest one so far. I tried to gather as many energy source photos as possible. Then, you might be able to use some of them in other books of yours.
Here are the candidates:

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original017.jpg

original017.jpg

original019.jpg

original020.jpg
Here are the candidates:

original016.jpg

original017.jpg

original017.jpg

original019.jpg

original020.jpg
Labels: chapter nine, energy, physics for all one

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