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In electronic logic circuits, a pull-up resistor (PU) or pull-down resistor (PD) is a resistor used to ensure a known state for a signal. [1] It is typically used in combination with components such as switches and transistors, which physically interrupt the connection of subsequent components to ground or to V CC.
The pull-up begins at the "dead-hang" with arms extended and the body hanging motionless. A successful pull-up is performed without excess motion, the body rising until the chin is above the bar, and body lowered back to the "dead-hang" position. There is no time limit. [5] Until 2017, male Marines were required to perform pull-ups, and female ...
The Army Physical Fitness Test (APFT) was a test designed to measure the muscular strength, endurance, and cardiovascular respiratory fitness of soldiers in the United States Army. The test contained three events: push-ups, sit-ups, and a two-mile run with a soldier scoring from 0 to 100 points in each event based on performance.
The Texas Instruments TI-30 retailed for $24.95 (about $130 today) and operated on a 9-volt battery. It had a red, eight-digit display and offered such functions as percents, constants, roots ...
This picture shows clockwise from top left: An Arithmometer, a Comptometer, a Dalton adding machine, a Sundstrand, and an Odhner Arithmometer. A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or (historically) a simulation such as an analog computer or a ...
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Slide rule. Typical ten-inch (25 cm) student slide rule (Pickett N902-T simplex trig) A slide rule is a hand -operated mechanical calculator consisting of slidable rulers for evaluating mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry.
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