Physics (from the Greek φυσικός (phisikos), "natural", and φύσις (phisis), "nature") is the science of the natural world in the broadest sense of that term. It deals with matter and energy, and the fundamental forces of nature that govern the interactions between particles. It was known as natural philosophy until the late 19th century.
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This category has the following 24 subcategories, out of 33 total.
The following 176 pages are in this category, out of 264 total. This list may sometimes be slightly out of date (learn more)