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Many laboratories contain significant risks, and the prevention of laboratory accidents requires great care and constant vigilance. [1] [2] Examples of risk factors include high voltages, high and low pressures and temperatures, corrosive and toxic chemicals and chemical vapours, radiation, fire, explosions, and biohazards including infective organisms and their toxins.
See a breakdown of the MHSAA pitching regulations ahead of a busy stretch of baseball featuring the Diamond Classic and the state tournament.
In NFHS (high school) rules, a balk is always a dead ball. The most common balk scenarios are when a pitcher fails to come fully set (if using the set position ) before his delivery; or having coming set, starts his motion and stops again (sometimes called a "double set"); or failing to step directly at a base when attempting a pickoff throw.
Called balls and the walk were introduced in 1863. In 1867, the batter had the right to call for a high or low pitch, to be determined by the umpire. The National League formed in 1876. Its rules changed almost yearly for the next quarter century. In 1880, a batter was out if the catcher caught the third strike; otherwise, the batter got four ...
Here are really specific rules Major League Baseball players follow, from uniform dos and don'ts to the "unwritten rules" that athletes uphold on the diamond.
Under Little League (LL), high school and college rules, if interference is committed by a runner with the effect of preventing a likely double play, regardless of his intent, the batter-runner will be called out in addition to the runner who committed the interference.