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One billionth of a second. Time for molecules to fluoresce. shake: 10 −8 s: 10 nanoseconds, also a casual term for a short period of time. microsecond: 10 −6 s: One millionth of a second. Symbol is μs millisecond: 10 −3 s: One thousandth of a second. Shortest time unit used on stopwatches. jiffy (electronics) ~ 10 −3 s
Lunch periods in high school could be up to 240 minutes long. A free period in a college is a time period that a student is not enrolled in a class. During the free period, students are completely free of adult supervision and could do whatever they want that complies to the campus rules and the law.
A science project is an educational activity for students involving experiments or construction of models in one of the science disciplines. Students may present their science project at a science fair, so they may also call it a science fair project. Science projects may be classified into four main types.
A science fair or engineering fair is an event hosted by a school that offers students the opportunity to experience the practices of science and engineering for themselves. In the United States, the Next Generation Science Standards makes experiencing the practices of science and engineering one of the three pillars of science education.
In the International System of Units (SI), the unit of time is the second (symbol: s). It has been defined since 1967 as "the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom", and is an SI base unit. [12]
Period (periodic table), a horizontal row of the periodic table "Period-" or "per-iod-", in some chemical compounds, "per" refers to oxidation state, and "iod" refers to the compound containing iodine; Unit of time or timeframe Period (geology), a subdivision of geologic time; Period (physics), the duration of time of one cycle in a repeating event
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Assignments are either in-class or take-home tasks to be completed for the next class period. [8] These tasks are important because they help ensure that the instruction provides the students with a goal, the power to get there, and the interest to be engaged in rigorous academic contexts as they acquire content and skills necessary to be able ...