Questions Asked on
April 13, 2008

Physics
Water drives a waterwheel (or turbine) of radius 3.0m. The water enters at a speed of v1 = 7.0 m/s and leaves at a speed of v2= 3.0 m/s. A) if 150kg of water passes through per second, what is the rate at which the water delivers angular momentum to the
asked by Odd 
Atomic physics
1)What is the longest wavelength light capable of ionizing a hydrogen atom in the n = 6 state 2)a. Calculate the energy of the electron in the ground state of single ionized helium, which has an atomic number Z = 2. b. Calculate the radius of its
asked by Sandhya 
maths permutation & combination  answer pls check
Your password for a given website is made up of three letters followed by four numbers. Find the number of possible passwords if there are no restrictions on what three letters and what four numbers can be used. Pls check if my answer is correct 26C3*10C4
asked by matt 
Physics
A 2.00 cm x 2.00 cm square loop of wire with resistance 1.30×10^−2 Ohms is parallel to a long straight wire. The near edge of the loop is 1.00 cm from the wire. The current in the wire is increasing at the rate of 110 A/s. What is the current in the
asked by Manda 
chem
If 25 grams of solid ice at20 degrees C is heated to gaseous water at 125 degrees C, how much energy is required?
asked by joe 
physics
It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.20 GPa). As one goes deeper and deeper in the ocean, the pressure increases by 1.0*10^4 Pa for every meter below the surface. If a diver goes down 33.0 m (a bit
asked by Erin 
Chemistry
A standard solution of FeSCN2+ is prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN. The equilibrium concentration of FeSCN2+ ([FeSCN2+]std) for this standard solution is assumed to be ____ M. I tried this problem by adding the
asked by Renee 
statistics
Scores on a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4. Estimate the probability that among 75 randomly selscted students, at least 20 of them score greater that 78.
asked by Jean 
Science
what conversion factor if used to convert 10 hours to seconds? (1hr/60min)=(60min/120sec)=(10hr/600min)=(600min/36000sec) answer= 36000 sec.
asked by Anonymous 
Atomic physics
1)Five possible transitions for a hydrogen atom are listed below: Select whether the atom gains or loses energy for each transition. a. Loses Gains ni = 6; nf = 4 Loses Gains ni = 4; nf = 2 Loses Gains ni = 5; nf = 3 Loses Gains ni = 2; nf = 5 Loses Gains
asked by Sandhya 
chem 203
Br2=2Br When 1.05 mol of br2 is placed in a .950L flask, 1.20% of Br2 undergoes dissociation. Calculate the equilibrium constant Kc, for this reaction. Use ICE table.
asked by ron 
chem
20ml sample of .200M HBr is titrated w/ .200M NaOH. what is the ph after adding 15ml (base)?
asked by ami 
Annuities
Vic French mad deposits of 5000 at the end of each quarter to book bank, which pays 8% intrest compounded quarterly. After 3 years, Victor made no more deposits. What will be the balance in the account 2 years after the last deposit? I do not understand
asked by Scott Ingraham 
Physics
the volume of a cuboid is the product of its length, breadth, and height. give a possible metric unit for the volume. is the unit for volume a basic unit or a derived unit? m^3. it is a basic unit is this correct?
asked by Anonymous 
algebra
Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?
asked by hanaa 
literature/poetry
1. If this be error and upon me proved, I never writ, nor no man ever loved. These lines are an example of a/an A. quatrain. B. octet. C. couplet. D. sestet. 2. The line "I wandered lonely as a cloud" is an example of A. a metaphor. B. a simile. C. a
asked by bill 
physics
5)a. Electrons accelerated by a potential difference of 12.23 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength. b. Calculate the wavelength of light emitted with the
asked by Sandhya 
Physics
2)Identify the initial and final states if an electron in hydrogen emits a photon with a wavelength of 1282.0 nm. Enter the initial state first
asked by Sandhya 
algebra
suppose you invest 17000 at an annual interest rate of 3.9% compounded continuously? how much will u have in the account after 2.5 years?
asked by john 
Physics
I was having trouble with two different physics problems when studying for a test. Any help is appreciated. 1.) A 11.6kg block of ice has a temperature of 14.5 °C. The pressure is one atmosphere. The block absorbs 6.87 x 106 J of heat. What is the final
asked by Sam 
college algebra
Could you help me with this long division problem of a polynomial? 18x4+9x3+3x2/3x2+1
asked by Jeff 
English
Amelia Earharts "philosophy of life"???
asked by Soraya 
Physics
You need to make a 100 microH inductor on a cylinder that is 5.0 cm long and 1.0 cm in diameter. You plan to wrap four layers of wire around the cylinder. What diameter wire should you use if the coils are tightly wound with no space between them? The wire
asked by Jill 
algebra 1
A picture that measures 7 inches by 7 inches is being framed. The area of the frame is 32 square inches. What is the width of the frame?
asked by Jeannine 
history
The great French historian Jules Michelet (17981874) sympathized with the French Middle Ages and with the Revolutionary epoch in France, yet he wrote his best work on the despotic French monarchy, which he despised. 5) The statement above, if true, would
asked by Jeff 
critical thinking
In 1976 a powerful earthquake hit the city of Tangshan, China. Scientists had failed to predict the earthquake. If people had paid attention to the unusual animal behavior that preceded the earthquake, however, they would have known it was coming. Animals
asked by Matt 
12 BiologyTHIS IS URGENT
In relation to a work sheet on translation and transcription: If you worked backward, starting with the amino acid sequence of the protein, would you obtain the same DNA nucleotide sequence? Why or why not? THANKS!!!
asked by Miley Cyrus 
Science
What can you say about the motion of a body if: a. its displacementtime graph is a straight line inclined with the time axis b. its velocitytime graph is a straight line inclined with the same axis. c. its velocity time graph is a parabola A)the
asked by Anonymous 
Physics
I was having trouble with two different physics problems when studying for a test. Any help is appreciated. 1.) A 11.6kg block of ice has a temperature of 14.5 °C. The pressure is one atmosphere. The block absorbs 6.87 x 106 J of heat. What is the final
asked by Sam 
algebra
solve 7^5x=23. round to the nearest tenthousandth also solve in (4x +5)=4 round to the nearest thousandth
asked by john 
Physics
Given: Two particles are created in a highenergy accelerator and move off in opposite directions. The speed of one particle, as measured in the laboratory, is 0.580c, and the speed of each particle relative to the other is 0.920c. Problem:What is the
asked by Chelsea 
chemistry
Hi I sent this question a few days ago but did not get it answered I think it may have been mixed up in the jumble. Purpose: The purpose of this lab exercise is to construct a table of relative strengths of oxidizing and reducing agents. By completing this
asked by Joseph 
philosophy
For some philosophers, writing is an unfortunate necessity, a means of communication that is at best irrelevant to the philosophical thought it expresses and at worst a barrier to that thought. The words in which the philosophical investigator writes up
asked by Amanda 
environmental science
The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost
asked by Angel 
physics
First off, thanks a lot for your help. Secondly, will you do it again? A bicyclist traveling with speed v = 3.2m/s on a flat toad is making a turn with radius r = 2.8 m. The forces acting on the cyclist and cycle are the normal force (N) and friction force
asked by dear drwls 
Math (trigonometry)
Trigonometry identities are so hard... I need some help proving these identities: *Oh, and I'm only in grade 11, so the identities we use are quotient identity and Pythagorean identity. sinx/(sinx + cosx) = tanx/(1 + tanx) cos^2x  sin^2x = 2cos^2x  1
asked by Lucy 
Math(trigonometry)
Data: á = 32 degrees, side a = 2.5 feet and side b = 4 feet 1. Identify the swinging side and the fixed side in a possible triangle. 2. Compute the length of the shortest swinging side that will construct a triangle containing the data. (compute the
asked by dena 
writing
Hi I'm writing a research proposal and I'm not sure if my thesis is specific enough or needs improvement. Thesis: Currently in Afghanistan, the lack of an effective method of regulation of the production of the opium poppy continues to obstruct
asked by jason 
English (opinion)
What actor or actress would portray Amelia Earhart in a movie of her life story??? Why??
asked by Soraya 
>science/research<
hi i need a few websites where i can find information that can help me prove that the animals that existed in the past were far more dangerous anddifferent than the animals of today
asked by Markeda 
microbiology 2
molecular chronometers are used to determine the course of evolution.why, even with this "tool", is evolution still so complex?
asked by katlego 
Physics
I have to make up my own standardized questions for a project, and I wanted to make sure I did my math right. Can someone please check it? Thanks!! If your mass was 60 kg, the earth’s mass was 6×10^24 kg, the radius of the earth was 6.4×10^6 meters,
asked by Emily 
critical thinking
Which of the following, if true, provides the strongest support for an archaeologist’s conclusion that a particular stretch of ancient stonepaved road was part of the Inca road system?
asked by tricia 
Chemistry
Liquid Chromatography lab: Why is it important that the solvent level not drop below the upper level of the stationary phase once the stationary phase is packed in the column. is it because if the stationary phase dries out, then the mixture will be
asked by Matt 
Continued physics problem from before (way down)
Posted by Eileen on Sunday, April 13, 2008 at 10:05am. I am trying to do these 2 problems. I'm starting out with the RC Circuit (2nd one): h t t p ://img201.imageshack.us/my.php?image=circuit5ij7.png *delete spaces or link won't load! a) The capacitor acts
asked by Eileen 
Physics
Took a leaf out of Eileen's book for the picture corresponding to the problem (you have to delete the spaces in 'h t t p :'): h t t p ://img444.imageshack.us/img444/1057/circuit6pk4.png In the circuit that is in the link above, the switch S is initially in
asked by Bobby 
environmental science
The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost
asked by Angel 
Geometry
Can someone tell me how to solve these proportions? Thank you 5 7   = x  1 x
asked by Lauren 
History about Gandhi
is Gandhi a political activist???
asked by Soraya 
English
Hi, can someone proofread this and let me know if there are any grammatical mistake. I'll appreciate it. Thanks. This experiment was preformed to determine if Drosophila fruit flies inherit apterous (ap) or a wild type (+/+) phenotypes. The wild type is
asked by Bizzy 
economics
IF I have a perfectly elastic supply (horizontal), and the unit price of cigarettes goes up by increasing cigarette tax from 8 cents to $1.50, I know the quantity demanded goes down, but what happens in the long term (specifically in regards to tax
asked by Kurt 
science
Why is the mechanical advantage of an inclined plane less than 1
asked by j 
art
what can I compare and contrast about arthur boyd
asked by Judy 
chemistry
Hi I sent this question a few days ago but did not get it answered I think it may have been mixed up in the jumble. Purpose: The purpose of this lab exercise is to construct a table of relative strengths of oxidizing and reducing agents. By completing this
asked by Joseph 
Circuit Problem Physics
I am trying to do these 2 problems. I'm starting out with the RC Circuit (2nd one): h t t p ://img201.imageshack.us/my.php?image=circuit5ij7.png *delete spaces or link won't load! a) The capacitor acts as a bare wire with no resistance, so: I=V/R=V/(4/5R)
asked by Eileen 
Academic Writing II
Please, somebody help me. I need 3 traits on Robert Frost's writing and I'm clueless. I don't even like his poems, and I'm supposed to write a 3paragraph paper on him. So far, I'm thinking 'He likes to write with humor' and 'He likes to use metaphors'. I
asked by Ashley 
Critical Thinking
(1) It is an article of faith among some economists that the significant inventions of the contemporary world are the results of the innovative genius of big business organizations. (2) Yet in the United States, the current trend toward corporate mergers
asked by Anonymous 
Chemistry.. help plz
The concentration and volume of reagents combined in each trial are listed in the table below: Trial 00020 M 00020 M H2O(mL) Fe(NO3)3(mL) KSCN (mL) 1 5 2 3 2 5 3 2 3 5 4 1 4 5 5 0 Initially (right after combining and before any reaction occurs) the
asked by Amy 
maths permutation and combination
Your password for a given website is made up of three letters followed by four numbers. Find the number of possible passwords if there are no restrictions on what three letters and what four numbers can be used.
asked by matt 
design technology
i`m finding it hard to find the answers to these questions for my homework . i know these questions have been asked before but i can`t find the answers from the websites people have been kind enough to find. Why is wool warmer than silk? why is silk
asked by zoe 
World History
What was the German form of this type of philosophy that was shaped by Hitler's fanatical ideas about German nationalism and racial superiority known as? The Third Reich
asked by Seth 
Algebra 2
Find an equation of variation where y varies directly as x and inversely as the square of w, and y=24 when x=8 and w=3.
asked by Amanda 
environmental science
The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost
asked by Pamela 
chem
If one gram of solid ice at 20 degrees C is heated to gaseous water at 125 degrees C how much energy is required?
asked by joe 
chem
How much heat(energy) in calories will it take to warm 25 g of ice at 10 degrees C to liquid water at 40 degrees C?
asked by bob 
commposition
How do I make an outline for a research paper?
asked by Eli 
Data analysis and statistics
I don't know where to begin with these problems would someone please call me Find the median of each set of numbers 14. 1, 4, 9, 15, 25, 36 Find the mode of each set of numbers. 9, 8, 10, 9, 9, 10, 8 41, 43, 56, 67, 69, 72 Statistics. A salesperson drove
asked by Theresa 
Science
I need a climatogram for these biomes and I can't find any! HELP! alpine temperate forest taiga ocean
asked by Taylor 
critical thinking
2) Which of the following, if true, would best explain the material presented in the table? A) The total value of property owned by Black residents in Washington during the 18301860 period was similar to that in other cities during this period. B) Rising
asked by tricia 
Algebra
A customer wants to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee, and he wants the teepee to be 12 feet across and 8 feet tall (see figure). How long should the pieces of PVC
asked by Anonymous 
science
In an ecosystem, some species become so adapted to each other that neither could survive without the other. Name one species and describe how it has become so adapted to organisms of another species that it could not survive without them. someone please
asked by Dj 
physics, social studies
The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost
asked by Pamela 
Francais
Could you please check this short paragraph for mistakes? Thank you, I appreciate it. Quand Heffner a pensé de créer sa société il vivait dans un motel et il il n'a eu aucun espoir. Sa société ne faisaient pas bien. Cinq ans après être parti de la
asked by Sarah 
business
Small companies typically have difficulty competing against large multinationals when their governments take part in regional trade blocs. What could governments do to help their small companies compete after the formation of such blocs?
asked by Anonymous 
Math
explain the difference between disjoint and overlapping events
asked by Cheyenne 
Science
I have to do a research paper on someone, anybody, famous or not. I have to tell the biograghy about them, the technology that has influenced them, and tell how it influenced them. It seems easy, except I don't know who to write about. Any ideas?
asked by Jennifer 
algebra
Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?
asked by hanaa 
Math
Define a relation R from Z to Z by (x,y) are in the relation if and only if the absolute value of (xy) is less than or equal to two. Is R symmetric?
asked by Jane 
Math
I need to figure out a pattern (using an algebraic expression) that will get me from: 1 to .01, 2 to .02, 3 to .04, 4 to .08, etc. all the way to 25 to 153,948.16! HELP
asked by Andrew 
social studies
My class is doing a project on baseball using the 5 themes of goegraphy and I can't figure these questions out. Please help! 1. Why was that particularsite chosen to build the Wrigley stadium? 2. Have people needed to adjust to the climate because of too
asked by Jillian 
Chemistry
I have to write a paper and bring in examples of each type of mixture for a class feast(so it needs to be edible). I want to know if i'm correct on the two that i have and i need an example of another and why it is it. I have KoolAid for a solution, jello
asked by Anthony 
Algebra2
Can someone check my answer for me. List all the possible rational zeros of f(x)= 3x^57x^3+2x15 p=15 1,3,5,15 q=3 1,3 answer: 1,3,5,15,1/3,1/5,3/5
asked by Jaden 
english
Officials are considering placing the sturgeon on the endangered species list. If such an action is taken, ships, including those that carry goods and produce, will not be allowed to travel on the large rivers in our region that serve as breeding grounds
asked by Becky 
Science
Does anyone have any suggestions on where I might find the answers to my question? I have tried several different ways, but have not been successful. I think if I find the first one, I will find the others. If you have two strands of DNA, how many new DNA
asked by Kally 
Legal
I have another question that's got me stumped... The question of amendments to indictments is now mostly regulated by A: Common Law B: Statute C: Local rules of court D: Code. I believe it's D but then again I can't decide it it might be B. Can you direct
asked by Justie 
Data analysis and statistics
I don't know where to begin with these problems would someone please call me Find the median of each set of numbers 14. 1, 4, 9, 15, 25, 36 Find the mode of each set of numbers. 9, 8, 10, 9, 9, 10, 8 41, 43, 56, 67, 69, 72 Statistics. A salesperson drove
asked by Theresa 
Microbiology
You have a debate in your study group whether rRNA alone can be used to determine the relatedness of organisms up to species level. Explain IN FULL whether you agree or disagree.
asked by Leah 
Microbiology
Molecular chronometers are used to determine the course of evolution. Explain in full what these are and how they are used. Why, even with this "tool", is evolution still so complex?
asked by Leah 
algebra
.25x+.4(60x)=60(.3)
asked by hanaa 
history
The great French historian Jules Michelet (17981874) sympathized with the French Middle Ages and with the Revolutionary epoch in France, yet he wrote his best work on the despotic French monarchy, which he despised. 5) The statement above, if true, would
asked by Jeff 
english
I'm having trouble finding quotes from Romeo and Juliet that relate to the themes of Hierarchy and Injustice/Prejudice.. please help :(
asked by Cynthia 
Algebra 2
Can someone help me on how to do this problem 2xy(3x^2)(4y^1)(5z^3)
asked by Vicky 
english
(1) It is an article of faith among some economists that the significant inventions of the contemporary world are the results of the innovative genius of big business organizations. (2) Yet in the United States, the current trend toward corporate mergers
asked by Angel 
Algebra I
I'm planning to landscape my yard. I plan to spend at least 6,000 and no more than 10,000. Write an inequality that shows this.
asked by Patricia 
algebra !help!
(6x^38x^214x+13)/(3x+2)
asked by hanaa 
history
i`m in year 7 and i need to write a newspaper report either from the catholic view or prodestant view about when hugh latimer and nicholas ridley bishops in 1555 were killed. no idea where to start.
asked by paul 
critical thinking
2) Which of the following, if true, would best explain the material presented in the table? A) The total value of property owned by Black residents in Washington during the 18301860 period was similar to that in other cities during this period. B) Rising
asked by tricia 
Math
I am having trouble understanding this problem. Please help. A customer wants to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee, and he wants the teepee to be 12 feet across and 8
asked by Anonymous 
critical thinking
property owned by black residents in Washington D.C 18301860 property value(dollars)no. of owners 1830 1840 1850 1860 1200 26 30 21 8 200400 20 35 58 51 400600 13 26 32 69 600800 7 16 20 61 8001000 2 5 11 48 10001500 2 8 19 69 15002000 1 1 1 21
asked by tricia 
algebra1
how do figure out how to graph y>1/5x2 5yx
asked by hjhgjh 
Math
Can someone check my work and see if I did this correctly? Problem: 9^(x+6)=3^x ln9^(x+6)=ln3^x (x+6)*ln(9)=x*ln(3) (x+6)/x=ln(3)/ln(9) x/x+6/x=0.49999977 1+6/x=0.49999977 6/x=0.499999771 6/x=(0.5000002) x=6/(0.5000002) x=(11.9999952) is this correct?
asked by Tim 
math
Find the standard form of the equation of the line that is perpendicular to 6x+5y=6 and contains (8, 6)
asked by mimi 
Algebra 2
Find an equation of variation where y varies directly as x and inversely as the square of w, and y=24 when x=8 and w=3.
asked by Amanda 
algebra
(6/9a^2)(3/12+4a)
asked by hanaa 
art
can anyone help? i need to find out what relief means for my art homework
asked by hayden 
algebra
153a/4(3a)(3+a)
asked by hanaa 
social studies
how did the pilgrims become friends with the wampanoag?
asked by samy 
art
The great wall of los angeles. what are the denotative elements of it?
asked by brookie 
Science
What is the basic structure of all organisms?
asked by Hannah 
philosophy
For some philosophers, writing is an unfortunate necessity, a means of communication that is at best irrelevant to the philosophical thought it expresses and at worst a barrier to that thought. The words in which the philosophical investigator writes up
asked by Amanda 
Chemistry
Trial:  00020 M  00020 M  H2O(mL)   Fe(NO3)3 mL  KSCN (mL)   1  5  2  3 Initially (right after combining and before any reaction occurs) the concentration of
asked by Anonymous 
English
what does it mean when it asks "for a person who you would view as an outstanding innovator in his/her own right?"
asked by Soraya 
World History
What is the ter for the political philosophy followed by Hilter and Mussolini that emphasized importance of the nation or of an ethic group and the supreme authority of the leader over that of the individual?
asked by Seth 
Science
is there are national park/monument in the rainforest???
asked by Taylor 
geography
how do trees help the enviroment ?
asked by leanne 
environmental science
what is the range of tolerance of physical and chemical conditions for giant pandas?
asked by zak 
science
how is your baby protected inside the uterus?
asked by muhamsx 
art
can i use clay over the top of mod rock to build up a structural sculpture
asked by bernadette 
algebra
how do i solve this problem? f(x)=3x and g(x)=4x3, find f[g(5)] and g[f(5)]
asked by john 
art
what is the difference between denotative elements and connotative implications?
asked by april 
math
can someone simpilfy this? 1+2/x1 divided by x^2/x divided by x^2+x2
asked by c.j. 
ecology
average rainfall per year in the ocean
asked by gabby