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Philippine Standard Time (PST or PhST; Filipino: Pamantayang Oras ng Pilipinas), also known as Philippine Time (PHT), [citation needed] is the official name for the time zone used in the Philippines. The country only uses a single time zone, at an offset of UTC+08:00 , but has used daylight saving time for brief periods in the 20th century ...
e. In chemistry, pH ( / piːˈeɪtʃ / pee-AYCH ), also referred to as acidity or basicity, historically denotes " potential of hydrogen " (or "power of hydrogen"). [1] It is a logarithmic scale used to specify the acidity or basicity of aqueous solutions. Acidic solutions (solutions with higher concentrations of hydrogen ( H+) ions) are ...
ISO 8601. International standard ISO 8601 ( Representation of dates and times) defines unambiguous written all-numeric big-endian formats for dates, such as 2022-12-31 for 31 December 2022, and time, such as 23:59:58 for 23 hours, 59 minutes, and 58 seconds. These standard notations have been adopted by many countries as a national standard, e ...
Each time zone is defined by a standard offset from Coordinated Universal Time (UTC). The offsets range from UTC−12:00 to UTC+14:00, and are usually a whole number of hours, but a few zones are offset by an additional 30 or 45 minutes, such as in India and Nepal.
The Second Republic was dissolved after Japan surrendered to the Allies in 1945; the Commonwealth was restored in the Philippines in the same year with Sergio Osmeña (1944–46) as president. Manuel Roxas (1946–1948) followed Osmeña when he won the first post-war election in 1946.
Beckman model 72 pH meter, 1960. 781 pH/Ion Meter pH meter by Metrohm. A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. [2] The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode ...
Due to Martial Law and subsequent political maneuvers, Marcos stayed in power until he was ousted in 1986. His extended rule as dictator lasted from 1972-1986, adding approx. 13 years to his tenure beyond what would have been a regular second term. Updated daily according to UTC.
The Manila Business School was founded and started its operation (later as the Philippine School of Commerce, 1908, then as the Philippine College of Commerce, 1952, and now the Polytechnic University of the Philippines).