Sunday
May 26, 2013

# Posts by Joanna

Total # Posts: 110

Univ Physics-resistance
I think I got part A and B. I need help on part C. How do I do it?

Univ Physics-resistance
A hollow cylindrical resistor with inner radius r1 and outer radius r2, and length l, is made of a material whose resistivity is rho. A.Find the resistance for current that flows radially outward. Divide the resistor into concentric cylindrical shells and integrate. Express yo...

Chemistry
The rate constant for a certain reaction is = 4.30×10−3 s^-1. If the initial reactant concentration was 0.400 M , what will the concentration be after 19.0 minutes? Rate would be first order therefore I used. A=A initial*e^-kt I keep getting .0030 M but supposely I...

Phys sci
what does that mean?

Phys sci
Which one of the following frequency can set the string into resonant vibration? If a guitar string has a fundamental frequency of 500Hz a)250Hz b)750Hz c)1500Hz d)1750Hz

Chemistry
I did a lab where we had to determine the iron content in ore...i am confused about the reactions that occured during the reaction...i need reactions for the following... 1) The samples were treated with 6M HCl until all the iron ore dissolved.Assuming all of the ore is in the...

Algebra 2
I need to know how to solve quadratic equations by factoring. Can you so a step by step explanation to this sample problem? 2 x -12x-28

history
why was it biased for President William Mckinley to say that the fillipinos are unfit for self government?

history
Why did Andrew Carnegie want to achieve both horizontal and vertical integration?

social studies
what is the difference between vertical and horizontal integration?

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