Which one is the correct sentence? If they both need grammar work do tell. a)This gives evidence that people will work hard, but will never receive a fair deal for their effort. OR b)This gives evidence that people will be working hard, but will never receive a fair deal of ...
March 14, 2011
The meter stick in the drawing can rotate about an axis located at the 20.0-cm mark. The axis is perpendicular to the screen. A force F acts at the left end; the force is perpendicular to the meter stick and has a magnitude of 175 N. A second force, either F1 or F2, acts at ...
February 11, 2011
Can you please tell me if these are right? A gas has a volume of 2.8 L at a temperature of 27 degrees C. What temperature degrees C is needed to expand the volume to 15 L? (P and n are constant.) I got 1334 degress C Combined gas law problem a balloon is filled with 500.0 mL ...
November 14, 2010
i am a decimal with my last digit in the hundredths. rounded to the nearest tenth. I am 6.5. Rounded to the nearest whole number. I am 6. if the sum of my digits is 16. what number am i?
October 30, 2010
Which objects in the solar system have been least modified since the formation of the solar system? a)asteroids b)Kuiper Belt objects c)meteoroids d)terrestrial planets e)jovian moons
September 27, 2010
I need to work out a mechanism for the synthesis of 2-cyclohexylpropanal. I am not sure what the reaction is to make this or what reagents to start from. I thought that maybe it could be an aldol reaction starting from cyclohexanone and propanal but I'm not sure if this ...
September 5, 2010
You are given a 6-month assignment by your employer to work at a remote location in Australia. In order to pack as lightly as possible, you try to research the climate of a small town in Australia. There is little data since no major cities are located within 300 miles of the ...
July 13, 2010
Compare England in the 17th century with other absolutist regimes on the continent of Europe. How did the English situation differ from that of absolutist states? What was the major reason for Englands exceptional situation?
June 23, 2010
200 g of a non-electrolye is dissolved in 1000 g of water. The boiling point of the solution is then measured to be 101.5 C. What is the molar mass? (the Kb for water is 0.51 C/m) I know deltaT = 0.51 C/m but where do I go from there?
June 8, 2010
Scandium Sulfide. Would i be correct in thinking that the bonding associated with this compound is Ionic. I think this as the two ions involved are oppositely charged? If im wrong could you please tell me why. Thanks so Much in Advance.
June 2, 2010
An object is released into the air at an initial height of 6 feet and an initial velocity of 30 feet per second. The object is caught at a height of 7 feet. Use the vertical motion model, h = -16t^2+vt+s, where h in the height, t is the time in motion, s is the initial height...
April 28, 2010
Ok thanks, so the transfer of energy is work done by the body? to clarify ... As the diver walks up the steps chemical energy is transferd through work and converts into GPE and kinetic energy. what is the energy transfer to begin the dive? chemical? once the dive has begun ...
April 27, 2010
I am trying to gain a understanding of the transfers and conversions of energy whilst the subject (being a diver) goes through its motions. Maybe i should be clearer .... SO as the diver makes his way to the top of the steps chemical energy is transferred from the body to the...
April 27, 2010
Hi there, would someone be able to tell me if this is right or almost right or really not right?! The scenario being explaining the transfers and conversions of energy of a diver. from walking up the steps to standing at the top of platform to jumping into pool and to start ...
April 27, 2010
hey. show 2sin(pi/14) is a solution to x^3-x^2-2x+1=0 and hint: let x=2sinu and sin(7u)=1 i can't seem to solve when i sub in the x value. how can i relate this to the seventh root of inifinity. i multiplu by sin^4 but they it just doesnt work.
April 23, 2010
What would be the product of the reaction of 4-methyl pyridine with Ac2O/AcOH and PhCHO? I'm really stuck on this. I'm guessing the pyridine will attack the anhydride and form an acyl pyridinium ion but I'm not sure where to go from there. If that reacts with AcOH ...
April 21, 2010
What would be the product of a reaction between methanal and pyrrolidine in acid? I know that normally a reaction between a carbonyl and a secondary amine would form an enamine. Here I am confused because there are no hydrogens that can be removed to form the enamine as this ...
April 7, 2010
Write the Hamiltonian operator for 2 electrons in a 1D box of length a. I know that the Hamitonian is a sum of the kinetic and potential energies. I was thinking that for 2 electrons in a 1D box it would be: -2((hbar^2)/2m_e)(d^2/dx^2)) + Coulomb interaction for 2 electrons I ...
April 5, 2010
Time dilation is the theory of time relative to motion. It is the principle that time elapsed is relative to motion, such that time passes more slowly for a system in motion than for one at rest relative to an outside observer. Further, as predicted by Einstein's special ...
March 28, 2010
Im after info that will help me answer what the relevance of the age of the oceanic crusts and the continental crusts within the south american plate Are there presence of hotspots on the south american plate? what is the process that is responsible for the change in area of ...
March 25, 2010
THANK YOU what is the magnitude of acceleration that the force 5.0 x 10³ N causes when applied to a vehicle with a mass of 1.1x10³kg??? How do i present the answer for this ?
March 24, 2010
SO desperate with help with this. What is the magnitude of the acceleration that this force will cause when applied to a car with a mass of 1.1x10³Kg Then calculate the final speed of the car (above) assuming that it was standing still initially and that the force of 5.0 ...
March 24, 2010
I have some enthalpies of formation for a reactant and transition state but calculated using different computational methods. I want to find the ratio of the forward rate constants determined using both methods but I'm not really sure how. I thought I could maybe use ...
March 13, 2010
Iron metal is dissolved in dilute aqueous HCl. The resulting solution is warmed with dilute nitric acid and then treated with aqueous potassium iodide. Write equations for the reactions. Ok so for the first step I got: Fe + 2HCl --> FeCl2 + H2 I'm guessing that when ...
March 2, 2010
I'm trying to write an equation for the reaction of zinc nitrate with aqueous ammonia. I know that zinc hyroxide is produced first but I don't really know how to write an equation for this. This is what I came up with: Zn(NO3)2 + 2OH- --> Zn(OH)2 + 2NO3- I'm not...
March 1, 2010
Satisfy me by improving this and I'll be thankful to you 4ever. In the following paragraphs I will be talking about her life, where and who she performed with, which songs she sang, and what awards she won, and her charity work. It seems like Im missin something around in ...
February 25, 2010
1. list all the possible ages of the children (you don't need to, cos i've done it for you) - eg. (1, 1, 11) (1, 2, 10) etc 2. if you list all this, you will find that there are 2 answers that give a solution of 36. these are: (6, 6, 1) and (9, 2, 2) 3. the master says...
February 3, 2010
Bunyan Lumber, LLC, harvests timber and delivers logs to timber mills for sale. The company was founded 70 years ago by Pete Bunyan. The current CEO is Paula Bunyan, the granddaughter of the founder. The company is currently evaluating a 5,000 acre forest it owns in Oregon. ...
January 30, 2010
I have to introduce myself (character, life) in an original way and I haven't got a clue how to do this. I'm not a very creative person and time is ticking. It's stressing me out. Anyone got ideas ?
January 13, 2010
At room temperature (25 degrees C) butane is a mixture of 72% anti and 28% gauche conformations. Calculate the difference in energy between the gauche and anti confromations. This is how I calculated it but I am not sure I am right: Boltzmann equation: N2/N1 = exp(-(E2-E1)/RT...
November 8, 2009
I would like to know everyone's favorite quotes. My favorite quote is: This is a miracle that happens everytime to those who really love; the more they give,the more they possess. Out of all the quotes, I have to pick top 6, and then everyone in my class will vote for the ...
October 17, 2009
I have to do this writing assignment on anyone I want to. I really like Bella from the movie twilight so i am doing this on her. I have to describe her and all. I already know how she is from my point of view, but I would like to know how she is from yours. so please describe ...
October 12, 2009