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www.reference.com/article/calculate-sum-arithmetic-sequence-70f916b0feb7b8d6

Calculate the sum of an arithmetic sequence with the formula (n/2)(2a + (n-1)d). The sum is represented by the Greek letter sigma, while the variable a is the first value of the sequence, d is the difference between values in the sequence, and n is the number of terms i...

www.reference.com/article/sequence-end-time-events-d1265078058b069b

There are several theories and scenarios about the end of time or end of the world, but all of these are mere probabilities. An example is the Big Crunch Theory, according to which the universe will end in a reversed Big Bang manner. Because the universe initially expan...

www.reference.com/article/heat-sequencer-work-1e4ab63f8ff44e65

On an electric furnace, the heat sequencer lets the heating elements receive electricity in turn rather than all at once. When the furnace first comes on, if all the heating elements could draw electricity at the same time, the resulting spike in current would trip the ...

www.reference.com/article/correct-sequence-cell-cycle-1c8ca559ca6bba5c

The sequence of the cell cycle is G1, S, G2, mitosis and cytokinesis. G1 and G2 are "gap" phases during which the cell grows and prepares for other phases. The S phase is the stage when DNA is copied. Mitosis divides the copies of DNA, and cytokinesis creates two new ce...

www.reference.com/article/rules-game-sequence-178b01598c6f9e59

Sequence is played by two or three players or by two or three teams. Each player is dealt the same number of cards, and in turn, exposes a card and marks it with a chip on the game board, striving to create a winning sequence of five chips.

www.reference.com/article/dna-sequencing-used-402151eea16dfe3e

DNA sequencing is used to identify individual genes within the DNA of any organism. This information can be used to identify variants and mutations that cause diseases and disorders.

www.reference.com/article/main-sequence-stars-abbebc39f698451d

Main sequence stars are stars in the phase where they are fusing hydrogen atoms to form helium. Once a star runs out of hydrogen and starts fusing helium to form heavier elements, a star enters its dying phase.