Science Fair Project Encyclopedia
Ph
PH or ph or pH or Ph may be:
- In chemistry, pH is a measure of acidity.
- Also in chemistry, specifically organic chemistry, Ph stands for a phenyl ring.
- Philippines (ISO country code).
- phot (ph), a measurement of illumination.
- In computational complexity theory, PH is the union of all complexity classes in the polynomial hierarchy.
- A grapheme pronounced like "f", often in words derived from the Greek language containing φ.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details