bond angles. (Note that the angles ‚ ‚ ‚ and are always zero.) The surface area of a sphere is: Archimedes first derived this formula[citation needed] from the fact that the projection to the lateral surface of a circumscribed cylinder (i.e. the Lambert cylindrical equal-area projection) is area-preserving; it equals the derivative of the formula for the volume with respect to r because the total volume inside a sphere of radius r can be thought of as the summation of the surface area
Premium Volume
CHAPTER 1 ELECTRICAL FORMULAS OHM’S LAW/POWER FORMULAS R x I2 E x I P R P E E2 RxI R P I P x R E I P I E R E R P I2 E2 P P = Power = Watts R = Resistance = Ohms I = Current = Amperes E = Force = Volts 1-1 OHM’S LAW DIAGRAM AND FORMULAS E I E = I x R I = E ÷ R R = E ÷ I R Voltage = Current x Resistance Current = Voltage ÷ Resistance Resistance = Voltage ÷ Current POWER DIAGRAM AND FORMULAS P E I = P ÷ E E = P ÷ I P = I x E I Current = Power ÷ Voltage
Premium Alternating current Electric current Electricity
PMP® Formula Pocket Guide Print it - Fold it - Study wherever you go. Earned Value CV = EV - AC CPI = EV / AC SV = EV - PV SPI = EV / PV EAC ‘no variances’ = BAC / CPI EAC ‘fundamentally flawed’ = AC + ETC EAC ‘atypical’ = AC + BAC - EV EAC ‘typical’ = AC + ((BAC - EV) / CPI) ETC = EAC - AC ETC ‘atypical’ = BAC - EV ETC ‘typical’ = (BAC - EV) / CPI ETC ‘flawed’ = new estimate Percent Complete = EV / BAC * 100 VAC = BAC - EAC EV = % complete * BAC Mathematical Basics Average (Mean) = Sum
Premium Net present value Cost-benefit analysis Depreciation
Slovin’s Formula Sampling Techniques * By Steph Ellen‚ eHow Contributor * When it is not possible to study an entire population (such as the population of the United States)‚ a smaller sample is taken using a random sampling technique. Slovin’s formula allows a researcher to sample the population with a desired degree of accuracy. It gives the researcher an idea of how large his sample size needs to be to ensure a reasonable accuracy of results. * When to Use Slovin’s Formula * If
Premium Sample size Sampling Sample
required by the study Determine sample size ▪ Slovin Formula: ▪ n = N__ ▪ 1+NE² ▪ Where: n = sample size ▪ N = population size E = margin of error * desired Example: What should be the representative sample size if the population from which the sample will be taken is 10‚000 and the desired margin of error is 2%? Solution: To determine the sample size‚ use the formula; n = ___N__ 1+NE² n =
Premium Sampling Sample size Sample
The Hubbart Formula Where would a hotel manager start in determining the fair price for a guest room? What is a fair value? This question has daunted innkeepers from the beginning. Charge rates too high‚ and no one will stay with you. Setting rates too low‚ and the owner makes less money. For many years in the beginning of the modern hotel era‚ hotel managers simply guessed. As unscientific as this approach sounds‚ it did work to an extent. After a hotel has been in business
Premium Area Hotel Hotels
correct formula for the following binary ionic compounds. (a) Lithium fluoride LiF (b) Calcium oxide CaO (c) Aluminum nitride AlN (d) Beryllium chloride BeCl2 (e) Potassium iodide KI (f) Aluminum oxide Al2O3 23. Write the correct formula for the following binary molecular compounds. (a) Carbon monoxide CO (b) Boron tribromide BBr3 (c) Sulfur hexafluoride SF6 (d) Carbon dioxide CO2 (e) Carbon tetrabromide CBr4 (f) Nitrogen dioxide NO2 24. Write the correct formulas for
Free Oxygen Oxide Aluminium
Average formula: Let a1‚a2‚a3‚......‚an be a set of numbers‚ average = (a1 + a2 + a3‚+......+ an)/n Fractions formulas: Converting a mixed number to an improper fraction: Converting an improper fraction to a mixed number: Formula for a proportion: In a proportion‚ the product of the extremes (ad) equal the product of the means(bc)‚ Thus‚ ad = bc Percent: Percent to fraction: x% = x/100 Percentage formula: Rate/100
Premium Volume Length
prevent buckling if the temperature range is -30Cº to +50Cº? I know I use the formula: L = LoT L = ? (Change in length of the slabs. We are solving for this.) = 12e-6 (Coefficient of expansion. I looked it up on page 388.) Lo = 14 m (Initial length of slabs.) T = 30 Cº (50Cº - 20Cº) (Change in temperaure. You only care about the hottest number since you are dealing with expansion.) I then had the formula: L = e14 m 30Cº L = .00504 m L = .50 cm The space between
Premium Thermodynamics Volume
Microsoft Excel: Formulas‚ Formulas... Northern New York Library Network 6721 US Hwy 11 Postdam‚ NY 13676 877-833-1674 or 315-265-1119 www.nnyln.org Jim Crowley C3 - Crowley Computer Consulting 9148 State Highway 37 Ogdensburg NY 13669 315-394-7008 fax 315-394-7009 www.crowleycomputers.com jim@crowleycomputers.com Description: Excel has hundreds of functions and nobody knows them all‚ but spend some time and learn to create more powerful formulas. Students will dive into decision making functions
Premium Spreadsheet Mathematics Multiplication