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Disintegrations per minute (dpm) and disintegrations per second (dps) are measures of the activity of the source of radioactivity. The SI unit of radioactivity, the becquerel (Bq), is equivalent to one disintegration per second. This unit should not be confused with cps, which is the number of counts received by an instrument from the source.
For instance, on average each gram of potassium contains 117 micrograms of 40 K (all other naturally occurring isotopes are stable) that has a / of 1.277 × 10 9 years = 4.030 × 10 16 s, [4] and has an atomic mass of 39.964 g/mol, [5] so the amount of radioactivity associated with a gram of potassium is 30 Bq.
It was originally defined as "the quantity or mass of radium emanation in equilibrium with one gram of radium (element)", [1] but is currently defined as 1 Ci = 3.7 × 10 10 decays per second [4] after more accurate measurements of the activity of 226 Ra (which has a specific activity of 3.66 × 10 10 Bq/g [5]).
Calculator Applications is one of several academic events sanctioned by the University Interscholastic League (UIL) in Texas, US. It is also a competition held by the Texas Math and Science Coaches Association, using the same rules as the UIL. Calculator Applications is designed to test students' abilities to use general calculator functions.
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However, investors seeking capital growth may prefer a lower payout ratio because capital gains are taxed at a lower rate. High growth firms in early life generally have low or zero payout ratios. As they mature, they tend to return more of the earnings back to investors. The dividend payout ratio is calculated as DPS/EPS.
Students in grades 5 & 8 are tested in reading, mathematics, and science. [3] Grades 4 and 7 are tested in writing, however, in 2009, the writing test was canceled (students in grades 4 and 7 were tested in writing) and the social studies test was suspended for the 2010–11 and 2011-12 school years. The social studies test did return for the ...
Atomic clocks usually have an external PPS output, although internally they may operate at 9,192,631,770 Hz. [3] PPS signals have an accuracy ranging from 12 picoseconds to a few microseconds per second, or 2.0 nanoseconds to a few milliseconds per day based on the resolution and accuracy of the device generating the signal.