Questions Asked on
May 7, 2008

Science
Rubbing alcohol is a solution of 70 percent alcohol and 30 percent water. In the alcohol solution, which is the solute and which is the solvent? Explain.
asked by AmberNEED HELP!!! 
chemistry
I know how to use the equations pv=nrt and P1xV1/n1xT1 = P2xV2/n2xT2, but I don't understand when to use them. I have a test tomorrow and I'm going over some word problems, but I can't figure out how decide which formula you need to use. Is there a
asked by Kate 
physics
The nucleus of a copper atom contains 29 protons and has a radius of 4.8*10^15m. How much work (in electron volts) is done by the electric force as a proton is brought from infinity, where it is at rest, to the "surface" of a copper nucleus? I really got
asked by Shirley 
Social Studies/English
My social studies class is discussing the energy issues in the world today. I have to write an essay about an energy issue and include the two opposing sides viewpoints. The issue I would like to write about is the United States dependence on foreign oils.
asked by Jared 
chemistry
Explain in terms of molecular structure why sugars have a relatively high melting point compared to hydrocarbons of a similar size.
asked by Mable 
calculus please help me
Let f(x)=9sinx/2sinx+4cosx. Then 'f(x)= ((2sinx+4cosx)(9cosx)(9sinx)(2cosx4sinx))/(2sinx+4cosx)^2. The equation of the tangent line to y=f(x) at a=2 can be written in the form y=mx+b where m= 9and b= ______.?????
asked by Leslie 
quantum physics
After a .800nm xray photon scatters from a free electron, the electron recoils with a speed equal to 1.20 x 10^6 m/s. (a) What was the Compton Shift in the photon's wavelength? (b) Through what angle was the photon scattered? I got an answer for (a), but
asked by Mischa 
science
Would you expect the dissolved oxygen concentration of water samples taken from a lake at 7 am to be higher or lower than samples takn at 5 pm? I feel like there may be more dissolved oxygen in the sample taken at 7 am because photosynthesis probably took
asked by Jin 
math
Find the value of k such that the system of linear equations is inconsistent. {4x8y = 3 {2x+ky = 16 I know that the answer is k = 4 but I don't know how to solve to get that answer.
asked by anonymous 
Physics
Bulb P is rated 60 W, 110 V, and bulb Q is rated 100 W, and 110 V. Which of the bulbs has the higher resistance? they have the same cannot be determined bulb P bulb Q I had they have the same.
asked by Jane 
Chemistry  please help!
How do you do the simplified structural formula and full structural formula of ester? I'm really struggling,please help! e.g.methyl ethanoate/propyl methanoate
asked by Anonymous 
chemistry
If it requires 54.7mL of a 0.0765 M HCl solution to complete neutralize 25.0 mL of a KOH solution, what is the molarity of the KOH solution.?
asked by katie 
Physics
170 students in a lecture hall can scream at 115 dB. Thus, we should expect that: A. an average student can do 0.68 dB by him or herself. B.340 average students can do 125 dB. C.340 average students can do 230 dB. D.1700 average students can do 125 dB.
asked by Carrie 
grammar
Is fine arts program capitalized?
asked by anonymous 
chemistry
A scuba tank is filled to 2500 psi(170 atm) in a dive shop at room temp/(25 degrees C) then stored in the trunk of a car on a hot day. What will be the new pressure in the tank if the temp. in the trunk reaches 60 degrees C? Express that pressure in
asked by katie 
english
sorry it didn't post all the way With the way things are today, with business after business trying to outdo each other in performance, many businesses are now changing the way they look at things and are now trying to beat out their competition in a
asked by ??????? 
Geography
A Day Without Farming? This is for Geography. I have to hand in one page talking about what a day without farming would be like. Any ideas? Does anyone feel like writting a bit? Any suggestions would be very appriciated. Thanks in advance! (Sorry, I just
asked by Karr 
INB
Effects of Economic and Socioeconomic Forces: Choose one newly industrializing countries mentioned in the text (p. 102 International Business) Choose a product you think would be suitable to export to the country you chose based solely on that country’s
asked by deshaun 
Economics
Assume the demand for beef is given by Qd = 22 + 0.1 Y – 10Pb + 5 Pc And the supply of beef is given by: Qs = 400 + 500Pb – 200 Pf where Qd denotes quantity of beef demanded, Qs denotes quantity supplied, Pb denotes price, of beef, Y denotes per
asked by Sara 
Algebra 1
Your uncle buys a new car that comes with seven new tires, one for each wheel, and three spares. He decides to be economical by using the three spares as much as the other four. If he drives 22, 750 miles and each tire has been used equally, what will be
asked by Libby 
chemistry
a 36.o% Aqueous solution of sucrose has a density of 1.16g/mL.What mass of sucrose is in 500mL of this solution?
asked by katie 
chemistry
Calculate the volume of a 9.00 M HNO3 stock solution that must be used to prepare 450 mL 0f a 1.80 M HNO3 solution.
asked by katie 
chemistry
predict the pH of an aqueous solution that is 0.00378 molar in HBr
asked by katie 
Chemistry
Hi there. I'm doing a paper on Biology (yes I know, will explain the chem link in a sec) and in it am trying to find the best pH level for Slaters, using limewater and filtered water to change concentrations. I have done experiments and using bunch of
asked by JB 
chemistry
Calculate the molarity of a solution that is prepared by dissolving 23.35g of CaCl2 in a sufficient amount of water to make a 600 mL solution.
asked by katie 
algebra
(4b+5c)(4c+3b)=
asked by jesus 
math
multilpying nad dividing rational expressions
asked by valeria 
Literature
What are some sites any sites for the following books that I can look at: Rebecca by Daphne du Maurier, Fahrenheit 451 by Ray Bradbury, and Lord of the Flies by William Golding? Besides Sparknotes and PinkMonkey)
asked by Anonymous 
Psychology
Change your thinking(Title of my reseach paper) How do I plan to support my thesis with compelling arguments and counterarguments. My thesis statement is," Even though we experince situation that demonstrate this simple principle the way we think
asked by Zoe 
chemistry
what is the balanced chemical equation for aqueous hydrgoen peroxide to produce solid lead (II) sulfate and liquid water?
asked by rachel 
Math
30y = x^2  14x + 13 FOR X
asked by Bob 
Physics
For the medium to remain undisturbed as two pulses pass the same point, they must have equal amplitudes opposite amplitudes different amplitudes both a and b I had both a and b but im not sure.
asked by Jada 
chemistry
Assuming the volume of the connecting tubes is negligible, what will be the pressure in the apparatus after all of the stopcocks are opened and the gases are allowed to mix?
asked by katie 
FRENCH
If I would like to say: "Is your brother at home?" would it be correct to say: estil à la maison, votre frère? or votre frère, estil à la maison? Are your children in school" Sontils à l'école, vos enfants? Thank you
asked by Anonymous 
science
what is the science?
asked by sanjay 
Math (Calculus)
y= x^(2x+1) find the derivative of the function using natural log
asked by Amanda 
french
Today we learnt about negative of quelque chose. 1) J'ai entendu quelque chose. = Je n'ai rien entendu. 2) J'ai pense (passe compose) a (accent grave) tout. =Je n'ai pense a rien. Why is that in 1) rien is infront of the verb, and 2) is after the verb? How
asked by french 
Physics
What is the nature of an image formed by a concave mirror of focal length 10 cm for a real object placed 3 cm from the mirror real and inverted real and upright virtual and inverted virtual and upright Would it be virtual and inverted, I do not believe
asked by Lynn 
Sense and Sensibility
How do Marianne and Elinor compare and contrast?
asked by Anonymous 
science and politics
Should affected nations from global warming , be legally entitled to financial assistance from those who did cause them and who have benefied from them? explain if they should or shouldnt contribute
asked by Jay 
algebra
ok im feeling really dumb but TWO LINES intersect making 121 degree angle. other angles measure?
asked by Kaylee 
algebra
ok this is really hard i have a crossword puzzle 3Y9 Y=19 also They want to know what N stands for in this question the mean is 14. the data is N, 16,16,and 18. Last probability of 7 out of 20=N%
asked by Kaylee 
DUE AT MIDNIGHT: HELP ME!!
If the process of ion attraction within the nephron is not functioning properly what would you expect to find in the blood and urine?
asked by My 
basic english
What mark of punctuation is most closely associated with interjections
asked by patty 
English
What are 3 examples of rhyme schemes? My assignment was to get 5 and I got only 1. Can you give me 3 more? Here's one of the poems I have: To Anthea, Who May Command Him Any Thing Robert Herrick Bid me to weep, and I will weep, A While I have eyes to see;
asked by Laura Ray 
For Brandon
I replied to your answer, do you have any feedback for me? Thanks
asked by My 
Computers
How do you put sound and to make it play throughout a powerpoint presentation?
asked by Laura Ray 
chemistry
Describe the role of each of the following types of bonds in a polyamide: a) covalent bonds
asked by Alex 
CHEMISTRY HELP
IF ANYONE CAN HELP ME WITH MY HOMEWORK AND EXPLAIN EXACTLY HOW TO GET THE ANSWERSSS PLEASEEE HELP
asked by katie 
chemistry
What types of linkage joins the nucleotides a) within a single DNA strand and b) between two single DNA strands?
asked by Mable 
MATH HELP!
HELP! I REALLY NEED HELP IN BASIC SKILLS MATH! Can you please find me a GOOD web site that will help me in random basic skills math?
asked by Mack 
health care
describe at least two roles of medical staff and two roles of hospital administration that you consider most important.
asked by Will 
Social Studies
What is Cultural Diversity and why is Cultural Diversity necessary in the first place?
asked by Edward 
english
i need to know if my paper is in order and is grammatically correct. Symbolism, 1the use of symbols to invest things with a representative meaning or to represent something abstract by something concrete, is used in novels and stories by authors worldwide.
asked by k 
english
With the way things are today, with business after business trying to outdo each other in performance, many businesses are now changing the way they look at things and are now trying to beat out their competition in a different way, reputation. With a
asked by ??????? 
social studies
what was the role of the U.S. in emerging global community
asked by sandie 
mathany thoughts?
Not trying to bug anybody, but does anybody have any help they could give me with my 2 questions from yesterday? I'm really confused, so I'd appreciate ANY input. I've tried looking at math help websites and read all the definitions, but I'm just not
asked by Jennifer 
algebra
for the nonlinear equation f(x)=4x+4 x=2 x=4 is it correct to say that two inputs would be 12,20. If not could you help me with two inputs? Thank you
asked by C 
a really quick question over commas
I was nervous to see who would be in my classes and what my teachers would be like, but after the day had gone by I had a feeling that it would be a great year. MY QUESTION: Would there be a comma after "by" or after "but"?
asked by anonymous 
Science
What is the difference between a bottle of water and a bottle of hydrgen and oxygen gas?
asked by Laura 
HELP
ok this is really hard i have a crossword puzzle 3Y9 Y=19 also They want to know what N stands for in this question the mean is 14. the data is N, 16,16,and 18. Last probability of 7 out of 20=N%
asked by mia 
Science
The density of water is one gram per cubic cenitimeter. What is density of water in pounds per liter?
asked by Gabby 
science
what is a layer of organicsediment??
asked by briyanna brinson 
Math
Right now i'm doing this kinda cool (kinda) project. I need to find the price of all my supplies when i'm building something. So ummm yah. I need to know the pice of nails...you know not a finger nail but a nail that you use a hammer. I don't know how much
asked by Dawn 
science/mars core
when it explains the mars core is made of iron, sulfur, and "light elements" what does light elements mean or possibly made of? please help me!!!!!
asked by ruthie 
chemistry
Calculate the molarity of a solution that is prepared by dissolving 23.35g of CaCl2 in a sufficient amount of water to make a 600 mL solution
asked by katie 
Math
how do you do this?? 4x7=2(x+3)
asked by Mackenzie 
Calculus
I have a problem about complex number. Let z=7e^(7*pi*i/4) . Write z, z^4, z^7, z^(2) in the form a + b i I have no idea how to do it. Any hints will be appreciated.
asked by Kelly 
chemistry
what is the pH of an aqeuous solution with s hydroxide ion[OH] concentration of 7.5x1010 M?
asked by katie 
chemistry
a pH meter gives a readout of 9.35 when the probe is dipped into an aqueous solution containing the strong base NaOH. What is the molarity of this solution with the respect to sodium hydroxide?
asked by katie 
Anthropology
Create at least two arguments each pro and contra the establishment of a Global Culture does any one know about global culture or what it is
asked by LT 
Adv. Math
m  1 2/3 < 1
asked by Kenya 
chemistry
Suggest a type of reaction and the conditions required to breakdown polyamides into their monomers.
asked by Joshua 
math
write each number is two other forms 10+4+0.05
asked by jyssica 
math
Why does 0!=1
asked by bandit5571 
chemistry
There is an apparatus that consistsw of three glass bulbs connected by small glass tubes with the stopcocks closed. Given that the temp. is 27 degrees C, what is the pressure of a gas in each glass bulb? 1L=1.79g CO2 2L=0.162g H2 3L=4.87g Ar
asked by katie 
IB Algebra
okay. so i don't know how to do the square root things. so this is going to be my square root sign: ^ Multiply:x ^7 ^14 x ^2 ^27 if you couls help i would be very greatful!
asked by confussed 
history
Who was Minnesotas first school teacher
asked by nicholas 
English
What are some modern day applications to utopian and dystopian society?
asked by Christian 
ecology
what is the role of prouducers in a ecosystem
asked by kaela 
calculus
solve the following differential equation: y' + (y)tanh(x)  2e^x = 0
asked by Christine 
math
Steve was charged $60.00 interest for 1 month on a $3,000 credit card balance. What was the monthly interest rate?
asked by Anonymous 
Physics
For incomplete cancellation to occur, opposite pulses must have equal amplitudes different energies equal pulses equal displacements it seems like none of these are quite right but would different energies be the closest.
asked by Katie 
english
what are the branches of english
asked by nikki 
another comma question
It seemed like just the other day I was only beginning high school and now it’s coming to an end. Would there be a comma before and?
asked by anonymous 
math
calculate (x3)(x+2)
asked by jenna 
DUE AT MIDNIGHT: HELP ME!!
If the process of ion attraction within the nephron is not functioning properly what would you expect to find in the blood and urine?
asked by My 
Sense and Sensibility
What are good sites besides Sparknotes and Pink Monkey for this book?
asked by Anonymous 
arithmetic
how many threedigit integers greater than 500 contain only odd digits
asked by HELP! 
prealgebra
ok Relation between two quantities expressed as the quotient of one divided by the other? please help this is puzzling
asked by Kaylee 
music
ok what could be another way to state the dynamics what else could you call it in one word that's acctually a word. please and thankyou
asked by Kaylee 
PreAlgebra
i can help
asked by Lindsay 
SCIENCE!!!!!!
im learning about macromolecules, i need an experiment for a class to do!!!! PLEASE HELP
asked by Taylor 
algebra
Quartics using P(X) = af(b(xc)+d Recall Q(X) = (x2)(x1)(x+1)(x+2) a)Choosing a (i) Rewrite Q(x) for a. Let b = 1, c = 0 and d = 0 (ii) Make 3 copies of the same function on your calculator Let a= 1, 1 and 2 Your equations are Y1= __________(a=1) Y2=
asked by Mable 
algebra
Suggest a cubic that would best approximate a sine wave (f(x) = sin(x)) over the interval 0 less than or equal to x less than or equal to 2pi
asked by Alex 
algebra
Suggest a cubic that would best approximate a sine wave (f(x) = sin(x)) over the interval 0 less than or equal to x less than or equal to 2pi (i) What intervals would you be concerned with. What amplitude would you be working with (ii)Find a cubic that
asked by Alex 
music
when was the Davul drum invented?
asked by jj 
SCIENCE
WHAT IMPORTANT OBSERVATIONS DID DARWIN MAKE ON HIS VOYAGE?
asked by CARLOS 
Source Analysis
I have an upcoming source analysis for my mid year exam in Ancient History, and after my past few source anaylsis', I haven't had of the greatess success. If there any websites or guides that could help me anaylse sources, such as sections of text and
asked by TP 
Math
Write the function f(x)= 2x^24x+7 in standard form, then identify the vertex and the equation for the axis of symmetry.
asked by John 
ALGEBRA
How do you determine if a polynomial is the differnce of two squares.
asked by CYNTHIA 
social studies
after the first battle of bull run president lincoln appointed george mcclellan to lead the union army of the east
asked by hunter 
math
i need help please!!! 20(x5)=3(3x+5)
asked by Mackenzie 
science
What do altruism and kin selection have to do with natural selection?
asked by Bobby 
COM220
Is this a good thesis statement," It is true that, negative thinking can cause stress,anxiety,and anger. On the other hand,if we change the way we think about a situation it will help to have a positve impact on how to overcome negative thoughts".
asked by Demillia 
chemistry
What functional group(s) must be present in a monomer of a condensation reaction?
asked by Alex