Sunday
May 19, 2013

# Posts by jerry

Total # Posts: 264

Stats
Suppose the time it takes for a purchasing agent to complete an online ordering process is normally distributed with a mean of 8 minutes and a standard deviation of 2 minutes. Suppose a random sample of 25 ordering processes is selected. The standard deviation of the sampling ...

Physics
There are two particles (1 and 2) that are moving around in space. The force that particle 2 exerts on 1 is given by: F21(t)=Fx*e^−(t/T)i^ + Fy*sin(2πt/T) j^ Where the parameters have the values: Fx = 13.4 N Fy = -84.2 N T = 74 s tf = 140.46 s Find the average force...

Physics
A comet is traveling towards the earth. The comet has a mass of 5.50E+12 kg and a radius of 323 m. The comet is traveling with a speed of 13.5 km/s and spinning with a period of 0.15 seconds when its center is a distance 2.28E+7 m away from the center of the earth. The comet i...

Cranes
08/09/2005 Physics A crane is lifting a 200 pound object. The crane boom is 50 ft long. The boom forms an 85 degree angle with the horizontal. What is the torque applied to the crane boom?

dove elem
jill bought a coat for \$500 dollars the sale tax rate was 7% . what is the total cost of the coat including sales tax

Math
100 students were asked whether they are taking psychology or biology. 61 were taking pyschology, 18 were taking both and 12 were taking neither. how many were taking biology?

Chemistry
An unknown compound contans only C, H, and O. Combustion of 5.70 g of this compound produced 11.4g of CO2 and 4.66g of H2O. What is the empirical formula of the unknown compound? CHO

Chemistry
Complete combustion of 8.00 g of hydrocarbon produced 26.0g of CO2 and 7.99g of H2O. What is the empirical formula for the hydrocarbon?

Chemistry
A compound is 54.52% C, 9.15% H, and 36.32% O by mass. What is the empirical formula? The molecular mass of the compound is 132 amu. What is the molecular formula?

Chemistry
What is the empirical formula of a compund composed of 3.25% hydrogen(H), 19.36% carbon(C) and 77.39% oxygen(O) by mass?

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