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The USB HID class describes devices used with nearly every modern computer. Many predefined functions exist in the USB HID class. These functions allow hardware manufacturers to design a product to USB HID class specifications and expect it to work with any software that also meets these specifications. The same HID protocol is used unmodified ...
Sound transmission class. Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used.
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In mathematics, a rate is the quotient of two quantities in different units of measurement, often represented as a fraction. If the divisor (or fraction denominator) in the rate is equal to one expressed as a single unit, and if it is assumed that this quantity can be changed systematically (i.e., is an independent variable), then the dividend (the fraction numerator) of the rate expresses the ...
Petty officer, 2nd class, ( PO 2), is a Naval non-commissioned member rank of the Canadian Forces. It is senior to the rank of master sailor (formerly master seaman) and its equivalents, and junior to petty officer 1st-class and its equivalents. Its Army and Air Force equivalent is sergeant (Sgt); together, Sgts and PO 2s make up the cadre of ...
Rate equation. In chemistry, the rate equation (also known as the rate law or empirical differential rate equation) is an empirical differential mathematical expression for the reaction rate of a given reaction in terms of concentrations of chemical species and constant parameters (normally rate coefficients and partial orders of reaction) only ...
Dimensions. 26 cm × 33.9 cm (10 in × 13.3 in) Location. Fine Arts Museums of San Francisco, San Francisco. The Third-Class Carriage (French: "Le Wagon de troisième classe") is the name of at least three oil paintings entitled made by the French painter Honoré Daumier. In a realistic manner, Daumier depicts the poverty and fortitude of ...
Postal rates to 1847. Initial United States postage rates were set by Congress as part of the Postal Service Act signed into law by President George Washington on February 20, 1792. The postal rate varied according to "distance zone", the distance a letter was to be carried from the post office where it entered the mail to its final destination.