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The last ten seconds are usually counted down aloud "Ten seconds to liftoff. Nine, eight, seven, six, five, four, three, two, one." After a launch, most countdown clocks begin to show Mission Elapsed Time, which is typically shown as "T plus." The adjacent picture shows "+00:00:07", approximately seven seconds after liftoff.
The text below the image shows the time that corresponds to the movement of the indicator around the stopwatch. A stopwatch is a timepiece designed to measure the amount of time that elapses between its activation and deactivation. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a ...
A typical kitchen timer. A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software.
A play clock, also called a delay-of-game timer, is a countdown clock intended to speed up the pace of the game in gridiron football.The offensive team must put the ball in play by either snapping the ball during a scrimmage down or kicking the ball during a free kick down before the time expires, or else they will be assessed a 5-yard delay of game (American football) or time count violation ...
The user starts the chronograph (stopwatch) at the instant the event is seen, and stops timing at the instant the event is heard. The seconds hand will point to the distance measured on a scale, usually around the edge of the face. The scale can be defined in any unit of distance, but miles or kilometers are most practical and commonplace. [30]
A pitch clock displayed at Werner Park in 2015. A pitch clock (also known as a pitch timer) [1] is used in various baseball leagues to limit the amount of time a pitcher uses before he throws the ball to the hitter and/or limit the amount of time the hitter uses before he is prepared to hit.
A shot clock is a countdown timer used in a variety of games and sports, indicating a set amount of time that a team may possess the object of play before attempting to score a goal. Shot clocks are used in several sports including basketball , water polo , canoe polo , lacrosse , poker , ringette , korfball , tennis , ten-pin bowling , and ...
Accurate to within a few seconds over many thousands of years, they are used to calibrate other clocks and timekeeping instruments. [202] The U.S. National Bureau of Standards (NBS, now National Institute of Standards and Technology (NIST)) changed the way it based the time standard of the United States from quartz to atomic clocks in the 1960s.