Friday
December 13, 2013

# Posts by eileen

Total # Posts: 72

Physics/Force
building a device to shoote a plastic hockey puck with a lever (think pinball) attached to a bungie cord. How much force is needed to propel a plasic hockey puck 30 feet or 40 feet or 50 feet - what formula should I use? Can I calculate the force by how much the bungie cord st...

Math
Differentiate the following function (1/x)-(2/x^2)+(3/x^3) I got (-9x-3)/x^5

region and landforms
which region is known for its highestand lowest landformand temp in the US?

Science
A 5.0ml aliquot of a sample was transferred to a 25.0ml flask and acidified by addition of 2.5ml of 0.1M HClO4 and diluted to mark. 1.0ml of that solution was mixed with 5.0ml of 1 X 10-4M AYR(Aluminum)dye and 15.0ml ethanol in a 25.0ml flask and diluted to mark. What is the c...

science
Estimate the pH of water in equilibrium with CO2 with a concentration of .008867M. Use equilibrium concepts to estimate? Is Kc equilivate to the pH?

Math
Evaluate the difference quotient for the given function. f(x)=1/x, f(x)-f(a)/(x-a). Is the answer 1

Math
Use Part 1 of the Fundamental Theorem of Calculus to find the derivative of the function h(x)=integral [2,1/x]sin^4t dt

Math
Simplify 2x+1/2*sqrt(x-2)-2*sqrt(x-2)/(2x+1)^2

Math
Find absoulute maximum and absolute minimum of the function f(x)=2cost+sin2t

Math
Find the critical numbers of the function s(t)=3t^4+4t^3-6^2

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