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Dimensional analysis may be used as a sanity check of physical equations: the two sides of any equation must be commensurable or have the same dimensions. A person who has calculated the power output of a car to be 700 kJ may have omitted a factor, since the unit joules is a measure of energy, not power (energy per unit time).
To check the result of an arithmetical calculation by casting out nines, each number in the calculation is replaced by its digital root and the same calculations applied to these digital roots. The digital root of the result of this calculation is then compared with that of the result of the original calculation.
Sanity testing → Sanity check – I checked sources after finding this article while looking something up. The WP:COMMONNAME for the topic is "sanity check," which is better represented (by far) in sources, and the current title could refer to legal determinations of insanity rather than to checking mathematical calculations, which is the ...
The primary use of Green's functions in mathematics is to solve non-homogeneous boundary value problems. In modern theoretical physics , Green's functions are also usually used as propagators in Feynman diagrams ; the term Green's function is often further used for any correlation function .
The Little Professor is a backwards-functioning calculator designed for children ages 5 to 9. Instead of providing the answer to a mathematical expression entered by the user, it generates unsolved expressions and prompts the user for the answer.
The final College Football Playoff rankings will be revealed in just a few days, following the results of conference championship games. This is a significant moment as it will determine the CFP ...
When it comes to estimating the odds that your portfolio will last as long as you do, perhaps you use a calculator or hire a financial planner, one of the most important variables will be your ...
Mortgage rates stalled an upward rise this week as financial markets adjusted to a second Trump presidency. The average 30-year mortgage rate was essentially unchanged at 6.78% for the week ...