![]() ![]() The abbreviation is “gal” with no period in scientific practice. If you are using a gallon, be sure to specify US gallon or a UK (imperial) gallon (which is about 1.2 US gallons). In Microsoft Word, use insert/advanced symbol (not an apostrophe) for this symbol. Scientific style: use the symbol of (‘) for foot or feet, with no space.Example: The trebuchet measured 10 ft high.(Note: use numerical digits for measurements, which are different than count.) Do not use a period after “ft” for the scientific style symbol. Scientific style: use the symbol “ft” for either foot or feet.Example: The trebuchet measured ten feet high.Journalistic style: use the full word of foot or feet.Choose a method and be consistent throughout your document. Inside of a sentence, there are several ways to represent foot/feet. A horsepower-hour can be measured as 2.6845 MJ.A 12-W LED light can produce up to 800 lumens.A 32-watt 4-foot long fluorescent tube emits 2,600 lumens.Thus, the phrase 60-watt bulb is correct, because 60-watt is modifying the word “bulb.” When units are used as adjectives, a hyphen is appropriate. For these, no space is needed, but a space can be used for consistency inside a document or article. The exceptions to this rule are for the degree sign (°), minute for plane angle (‘), second for plane angle (”), inch (”), foot (‘), and percent (%). The calculation showed the semiconducting properties with an indirect band gap of ∼25 eV.Using NaCl as the press-transmitting medium, a single crystal, measuring ∼9 μm, was positioned in a diamond anvil cell.The results fell into the −20 to +100 ppm/☌ range.Under normal operation, the LED housing temperature can increase by as much as 39 ☌ above ambient conditions.When writing a measured unit, the numerical value comes first, followed by a space, followed by the unit.Ĭorrect: 5 V, 1.17 V, 8 ohm, 8 W, 17 cm, 2700 mm, 44 ☌ Incorrect: 2005 was the year that the atomic mass of Na was revised to 22.989 769 28 (2). Incorrect: Na (sodium) has an atomic mass of 22.989 769 28(2), which was revised in the year 2005. Incorrect: E=mc 2 is likely the most famous equation by any scientist.Ĭorrect: The atomic mass of Na (sodium) is 22.989 769 28(2), which was revised in the year 2005. NEVER begin any sentence with digits or symbols or units.Ĭorrect: The most famous equation by any scientist is likely E=mc 2. For more about abbreviations, go here.ĭo not mix a prefix with a unit symbol or abbreviation. It can be confusing because a lowercase unit, like hertz, uses a capitalized symbol or abbreviation/symbol. These are not considered abbreviations they are considered symbols as such, they follow the rules for mathematical symbols instead of traditional grammar rules for writing.ĭo not abbreviate units instead, use their symbols or unit names. Example: 8 kHzįor scientific, technical, or engineering writing, the use of the International System of Units (SI) is preferred. Scientific style (preferred for technical writing): use the digit, the prefix, and the unit symbols.Journalistic style: use the prefix and unit names spelled out.You can write values in one of two ways: journal style or scientific style. 2.6 laws and theories and phenomena, capitalization of.2.5 kiloohm, kilohm, kilo-ohm, kilo ohm. ![]()
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