What are proper techniques to induce crystallization from a saturated solution? (Select all correct answers.) Allowing the solution to cool down. Scratching the outside of the container with a glass rod. Seeding the solution. Adding a solvent that lowers the solubility of the...
April 29, 2010
Consider the electric field created by a very long charged line of negative linear charge density -2.50 nC/m. A small positive point charge of 7 mC moves from a distance of 9 cm to a distance of 17 cm. How much work is done by the electric field?
February 11, 2010
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 ...
February 9, 2010
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...
January 31, 2010
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...
December 1, 2009
Please Help Me Revise My Essay: An unknown author once said, A good teacher is like a candle - it consumes itself to light the way for others. Of all the teachers I have had throughout my educational history there is only one that stands out the most: My Human ...
June 26, 2009
math - gr 12
the social convenor has 12 volunteers to work at a school dance. Each dance requires 2 volunteers at the door, 4 volunteers on the floor, and 6 floaters. Joe and Jim have not volunteered before so the soicial convenor does not want to assign them to work together. In how many ...
February 23, 2009
I trying to find out what life was like in England in 1564 on rich and poor people, what jobs, kind of places they lived, social life, how much money to live, what food and drink they had. I have been unable to find a website that gives me this information. I hope you can help...
February 3, 2009
On a hot sunny day.... why is the chrome fender of a white convertable car with its top down cooler to touch, than its dark red plastic seats? Is it because the lighter the color is, the less heat is absorbed? why id an asphalt sidewalk warmer to touch on a sunny day than a ...
April 5, 2008
THERMAL PROPERTIES OF MATERIALS: 1)One average, which is hotter in the summer, a city far away from any large body of water or a similar city located near a large body of water? I'm not sure about the reason why, but I think the answer is a city located near a large body ...
April 5, 2008
A bank loan officer rates applicates for credit. The rating are normally distributed with a mean of 200 and a standard deviation of 50. Find the P60, the score which separates the lower 60% from the top 40%. I get 212.7, using the normal distribution tool at http://psych....
August 4, 2007
Each member of the sorority has to make their own bed. Sounds like a little Freudian tounge in cheek here. make their own bed should be make her own bed. Unless boys are now allowed in sororities, in this topsy-turvy world.
May 19, 2007
Health Project Ideas for a female reproductive system
i need ideas how to make a female reproductive or male reproductive made in clay or play doh other material its for school i'm a medical assistant student
February 6, 2007
orientalism of muslim and arab american
WOW...Here I am 2 years and 8 months after the question was first asked and only 5 months after the last post, looking of the answer to the same question...and yes I am taking Eth/125 at UofP. I am glad to see that other people were as confused as I am. Also, to let you know, ...
August 6, 2006