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  2. Duty cycle - Wikipedia

    en.wikipedia.org/wiki/Duty_cycle

    The duty cycle is defined as the ratio between the pulse duration, or pulse width ( ) and the period ( ) of a rectangular waveform. Spectrum in relation to duty cycle. A duty cycle or power cycle is the fraction of one period in which a signal or system is active. [ 1][ 2][ 3] Duty cycle is commonly expressed as a percentage or a ratio. A ...

  3. Alcohol by volume - Wikipedia

    en.wikipedia.org/wiki/Alcohol_by_volume

    Alcohol by volume. Alcohol by volume (abbreviated as alc/vol or ABV) is a standard measure of the volume of alcohol contained in a given volume of an alcoholic beverage, expressed as a volume percent. [ 1][ 2][ 3] It is defined as the number of millilitres (mL) of pure ethanol present in 100 mL (3.5 imp fl oz; 3.4 US fl oz) of solution at 20 ...

  4. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    To calculate a percentage of a percentage, convert both percentages to fractions of 100, or to decimals, and multiply them. For example, 50% of 40% is: ⁠ 50 / 100 ⁠ × ⁠ 40 / 100 ⁠ = 0.50 × 0.40 = 0.20 = ⁠ 20 / 100 ⁠ = 20%. It is not correct to divide by 100 and use the percent sign at the same time; it would literally imply ...

  5. Potassium-40 - Wikipedia

    en.wikipedia.org/wiki/Potassium-40

    Potassium-40 ( 40K) is a radioactive isotope of potassium which has a long half-life of 1.25 billion years. It makes up about 0.012% (120 ppm) of the total amount of potassium found in nature. Potassium-40 undergoes three types of radioactive decay. In about 89.28% of events, it decays to calcium-40 ( 40 Ca) with emission of a beta particle (β ...

  6. Discounts and allowances - Wikipedia

    en.wikipedia.org/wiki/Discounts_and_allowances

    Discounts and allowances are reductions to a basic price of goods or services.. They can occur anywhere in the distribution channel, modifying either the manufacturer's list price (determined by the manufacturer and often printed on the package), the retail price (set by the retailer and often attached to the product with a sticker), or the list price (which is quoted to a potential buyer ...

  7. List of United States presidential elections by popular vote ...

    en.wikipedia.org/wiki/List_of_United_States...

    In a United States presidential election, the popular vote is the total number or the percentage of votes cast for a candidate by voters in the 50 states and Washington, D.C.; the candidate who gains the most votes nationwide is said to have won the popular vote. However, the popular vote is not used to determine who is elected as the nation's ...

  8. Framingham Risk Score - Wikipedia

    en.wikipedia.org/wiki/Framingham_Risk_Score

    The Framingham Risk Score is a sex-specific algorithm used to estimate the 10-year cardiovascular risk of an individual. The Framingham Risk Score was first developed based on data obtained from the Framingham Heart Study, to estimate the 10-year risk of developing coronary heart disease. [ 1] In order to assess the 10-year cardiovascular ...

  9. Coefficient of variation - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_variation

    The coefficient of variation (CV) is defined as the ratio of the standard deviation to the mean , [ 1] It shows the extent of variability in relation to the mean of the population. The coefficient of variation should be computed only for data measured on scales that have a meaningful zero ( ratio scale) and hence allow relative comparison of ...

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