Questions Asked on
December 4, 2007

chemistry
Why is the formal charge on B in BF4 is 1?
asked by Km 
physics
A .100 kg meter stick is supported at its 40.0 cm mark by a string attached to the ceiling. A .700 kg mass hangs vertically from the 5.00 cm mark. A mass, m, is attached somewhere on the meter stick to keep it horizontal and in rotational and translational
asked by Anonymous 
physics
A uniform disk with a mass of 800 g and radius 17.0 cm is rotating on frictionless bearings with an rotational speed of 18.0 Hz when Jill drops a 130 g clod of clay on a point 7.10 cm from the center of the disk, where it sticks. What is the new rotational
asked by stephanie 
chem
how do you write the equilibrium expression for: C3H8 + SO2>
asked by madison 
Math
Les Fleurs, a boutique in Paris, France, had the following accounts in its accounting records at December 31, 20X2 (amounts in Euros, denoted as "E") Purchases………………... E250,000 Freight In……………… E8,000 Sales discounts………….
asked by Vision/ Help 
math
a rectangular garden 30 m by 40 m has two paths of equal width crossing through it as shown. Find the width of each path if the total area covered by the path is 325 M^2 (m squared) help
asked by sam 
Math
Find the area between y=3sinx and y=3cosx over the interval [0,pi].
asked by Ben 
Is this how you derive the formula for arc length?
For a smal change in x, dx: ds² = dx² + dy² ds = sqrt [(dx² + dy²)] s = INTEGRAL of sqrt [(dx² + dy²)] s = INTEGRAL of sqrt [(dx² + dy² * dx²/dx²)] s = INTEGRAL of sqrt[(1 + dy² * 1/dx²)] dx s = INTEGRAL of sqrt[(1 + (dy/dx)²)] dx
asked by Rob 
AP Biology
In cattle, the gene pair for red (RR) or white (WW) coat color shows an absence of dominance. Heterozygotes (RW) have a roan coat. Outline a breeding procedure to establish apure breeding herd of red cattle from a roan bull and white cow. A cattle breed
asked by bobby 
physics
A diver can change his rotational inertia by drawing his arms and legs close to his body in the tuck position. After he leaves the diving board (with some unknown angular velocity), he pulls himself into a ball as closely as possible and makes 2.16
asked by stephanie 
Calculus
A section of highway connecting two hillsides with grades of 6% and 4% is to be build between two points that are separated by a horizontal distance of 2000 feet. At the point where the two hillsides come together, there is a 50foot difference in
asked by Jon 
Indicators and Solutions
Which indicator is used to check for the presence or absence of simple sugars? What indcates the presence of simple sugars in a solution? What indicator is used to check for the presence of starch? What indicates the presence of starch in a solution?
asked by Mia 
english
can any one help me by getting me some info on princess diana her life story or a biography or something but not he wikipedia because i have that already so plz help me ty
asked by stacy 
math
A full grown oak tree loses an average of about 7 tons of water through its leaves per day. About how many tons of water is that per year? I need an exact answer using partial products. Can anyone please hlep?
asked by Becky 
please help me with my engineering homework
what are the advantages of having an optical biopsy?
asked by shylo 
math
what am I? I am a polygon and I have two right angles and one pair of parallel sides. Is it a rhombus? Please help.
asked by Rachel 
science
when on a roller coster at which point is the kinetic energy and potential energy located????
asked by taylor 
Earth Science
Hello, I need help with this question: When and why did eruptions occur with the volcanoes Pinatubo, Tambora, and mount toba. thanks
asked by chris 
earth science
Hello another question: why is yellowstone national park thought to be significant relative to volcanoes. thanks
asked by chris 
Algebra
I need the equation for this problem: I sold some books for $10 total on the Internet. If I had sold them at my garage sale I only would have received $6 or $4 less. What percentage did I gain by selling on the Internet?
asked by Gandma Beni 
trigonometry
find soultuion in degree, use exact value 1. cos2xcosx+sin2xsinx=1/2
asked by pam 
physics
What are vector components?
asked by Soly 
math
well, if its not a rhombus or a trapezoid then.... what has two right angles and one pair of parallel sides?
asked by Rachel 
physics
if the pulling force P is 150 N and the crate dosent move, what is the magnitude of f
asked by Anonymous 
Psychology
Are IQ tests an acurate reflection of intelligence? Are there social factors that influence the results of IQ tests?
asked by Christian 
factoring
Factor x3 + 9x2 + 27x + 27 Factor 8a3 + 60a2b + 150 ab2+ 125b3 I tried doing them, but I just don't get how; perfect squares didn't work and neither did decomposition... someone please help me.
asked by Chujung 
Science
why is the process of mitosis and meiosis important to a living organism? when would an organism need to undergo the process of mitosis?meiosis? what would happen if meiosis did not occur? any links or ideas?
asked by Michelle 
science
what are 2 types of weathering?
asked by dylan 
Mitochondria
Assume Cell 1 produces 1.0 x 105 ATP molecules while Cell 2 produces 1.0 x 108 ATP molecules. Which mitochondria, A or B, has the hardware to produce 1.0 x 108 ATP molecules? What told you this?
asked by May 
Science
Why are waves called perpetuaing waves
asked by Jordyn Henning 
HUM 130
Why do you suppose Guatama's leaving his wealth and family led to a religion that is the 4th largest in the world today? What exactly was the "spark" that caused the religion to spread like wildfire?
asked by dawn 
math
I don't understand how to write the formulas for unit analysis. I can do the problems, but the explanation of the formulas in my book doesn't make sense with the problems I am doing. For instance, this one: Find the unit rate: $2 for 5 cans of vegetables.
asked by Lydia 
AP Biology
Hi you guys I am having trouble with the cell communication chapter so I would really appreaciate if someone could help out with this question "What could happen to the target cells in an animal that lack receptors for local regulators?" I know that some
asked by Claudia 
Math
To determine if 3417 is prime, you would have to try dividing 3417 by every whole number less than 3416. True or false and how did you get the answer
asked by Beth 
AP World History
I have to do a project that is like a ABC book for the Islamic religion. Like A is for apple, i just have to do them in islamic terms. I have everything but X and I have been all over the internet with no luck!! If you can help me out, it could be a person
asked by Taylor 
geography
does anyone know what the three parts of climate are? i know two are precipitation and temperature. what is the third part??
asked by Alyssa 
civics
explain two weaknesses of the Articles of Confederation
asked by erika 
algebra
Which one is greater 5/6 or 8/9? I think it's 8/9.
asked by Tabby 
civics
why was the ratification by New York and Virginia critical to the success of the Constitution
asked by erika 
algebra
a and b are both the lengths of the legs of a right triangle, c is the length of the hypotenuse. Find the missing length if b=24 and c=25. I don't know how to do this.
asked by Tabby 
English
In Great Expectations by Charles Dickens, Chapter 1617, in what ways does Pip seem immature?
asked by Anonymous 
science
What type of electromagnetic radiation does a flame emit?
asked by Lorlexrik 
science
Why is visible light arranged into colors in order: red, orange, yellow, gree, blue, indigo, and violet?
asked by janna 
science
How could a thermogram taken of a home be helpful to the homeowner?
asked by billy 
trigonometry
How do you work these out? sec u 1 / 1cos u = sec u sec xcos x= sin x tan x 1/sin x  1/csc x= csc x  sin x
asked by jd 
Social Studies
What are the checks and balances? (In our government)
asked by Ariana 
Religon
What is the difference between the way Buddhists understand a person who has realized their buddhahood (बुद्ध) and the way Western religions experience the relationship between a Divine Being and the founders of religions? In other words, why
asked by Anonymous 
Physics, almost have it!
In a physics lab experiment, a student immersed 205 onecent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an
asked by Tia 
religion
Was there only one Buddha? This seems like a weird question. the first step is to decide what Buddha means and whether or not it is a name.
asked by Anonymous 
science
how does a water that you poured into a filter represent the concept of turbidity in nature?
asked by Anonymous 
Physics???
When the air temperature is below 0 C, the water at the surface of a lake freezes to form a sheet of ice. If the upper surface of an ice sheet 24.2 cm thick is at 10.7 C and the bottom surface is at 0.00 C, calculate the time it will take to add 1.80 mm
asked by Chels 
language arts
use a comma after introducttry elements in a sentence...can you give me an example if that kind of sentence??
asked by brittany 
Trigonometry
[sinxcosx/(1+cosx(][sinx/(1cosx)]= (cotxcosx+cscx)
asked by Christie 
Physics
A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s after traveling some distance. If the coefficient of kinetic friction is 0.35, find that distance. Can someone please show me the
asked by Lindsay 
Albebra
c squared4c12=0 we have to solve each equation by completing the square.
asked by Ron 
science
If radio waves are not compressional waves,like sund waves, what is their role in enabling us to hear music?
asked by Juliann 
Social Studies
I need help on these problems: 1.This water rising device cosists a simple leaver. 2.Which Egyptain word decribes the word Red Land, the desert 3.This Egyptaion god is represented by the Niles croc. 4.Blank is one of the world's oldest civilation and Busch
asked by Miley 
Science
why is the process of mitosis and meiosis important to a living organism? when would an organism need to undergo the process of mitosis?meiosis? what would happen if meiosis did not occur? any links or ideas?
asked by Michelle 
math
what pattern do you see in this list
asked by vamsi 
math
what is the solution for the logarithmic equation log2(x2+2x44)=2? x2=x squared
asked by sophea 
AP US History Essay
Explain why Britain finally decided against intervention on behalf of the Confederacy. In what ways was Britain helpful to the South anyway? I got the first part of the essay question, but i am having difficulty with the second. Any help would be
asked by Amanda 
trig
how do you solve this problem? 1+sinØ/cosØ +cosØ/1+sinØ = 2secØ and cosß cosß/1tanß = sinßcosß/sinßcosß
asked by jd 
world history
During caesar's rule, was italy affected?..and was italy even known around that time, like did they trade alot with other countries in the roman empire
asked by gabs 
algebra
if x+20x=0 how do i find what x is
asked by lee 
Physics
A 5.70 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.4 N at an angle theta = 27.5° above the horizontal. The coefficient of kinetic friction between the block and the floor is 0.10. What is the speed of the block
asked by Lindsay 
Algebra
I'm having trouble tunring 5 3/11 into a decimal. Can you explain it to me?
asked by Cody 
french
If i want to ask what clothing you are wearing today, is it Quels vetements or Qu'estce vetements tu portes or portestu aujourd'hui?
asked by Jim 
Math
Can somone explain what this means For a paper on philosophy of mathematics? Formalism holds that mathematical statements may be thought of as statements about the consequences of certain string manipulation rules.
asked by Sharar 
african literature
what is the meaning of the poem "africa" by david diop???
asked by klar maesen 
economics
What does internalizing an externality mean?
asked by Tabby 
French
so, how do u really say this quote in french? "You are in love when suddenly reality is in your dreams, and you cannot sleep anymore." help?
asked by Ellen 
PhysicsRutherford
Can you please give me a brief explanation of Rutherfords experiment?
asked by Soly 
physics
Two window washers, Bob and Joe, are on a 3 m long, 345 N scaffold supported by two cables attached to its ends. Bob, who weighs 750 N stands 1 m from the left end, as shown in Figure 8.37. Two meters from the left end is the 500 N washing equipment. Joe
asked by Anonymous 
portugese
Adeus Ano Veho Feliz Ano Novo Que Tudo se relize No Ano Que Vai Nascer Muito Dinhero no bolso Saude pra dar e vender can some plz translate this portugese song thanks
asked by Kijhauna 
african literature
what is the symbolic item will represent the poem "africa" by david diop???
asked by klar maesen 
Accounting
Can anyone give me a list of contra accounts and the accounts that they are contra counts too
asked by Alex 
precalc
How do you find the asymptotes in general?? For example... f(x)=(1/2)^x, how would I find that?
asked by Anonymous 
PHysicsalmost complete!
In a physics lab experiment, a student immersed 205 onecent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an
asked by Tia 
Atoms
You discovered a new atom! Wow, everyone at your lab is impressed!! Some are saying you may be nominated for the Nobel Prize in Medicine!!! If this is going to happen, you have to find out as much about the atom as you can, and you don’t have long to do
asked by Gessica 
Mathematics
Differentiate ln(x)1 I have d/dx lnx1 = d/dx(ln x) d/dx1 = d/dx(ln x) = 1/x Could you tell me if this is right or not? If not, please suggest the right working out.
asked by xX_Supaman_Xx 
Hum 130
How has modern civilzation impacted the spirtual lives of the indigenons people
asked by anaya 
Ions, Ions
ION // H+ IONS OUTSIDE THE CELL // 2,000 IONS INSIDE THE CELL // 10 Will this ion enter or leave the cell? Explain why.
asked by Angela 
Calculus
Find the volume of the solid obtained by rotating the region enclosed by the graphs of y=15x, y=3x+11 and x=0 about the yaxis.
asked by Al 
history
what is a group of people captured and taken to Babylon by the Chaldeans?
asked by penelope 
Psychology
What is "moral education" ?
asked by Anonymous 
Another Ion Question
ION // F IONS OUTSIDE CELL // 19,000 IONS INSIDE CELL // 20,000 Why would this ion leave the cell? Explain please.
asked by Angela 
Trigonometry
x square root of 2 + 3x =4 all over square root of 2
asked by Anonymous 
math
Find the perimeterof a decagon if each of its sides are 5.9 yards long?
asked by madison 
rec and leisure
does anyone have any ideas of a class interaction i could use for a presentation on youth recreation.
asked by DAVE MCDONALD 
Trig
x[sqrt of 2] + 3x = 4
asked by Anonymous 
math
wat is 45x320?
asked by rick 
analytical chemistry
What is the pH of a solution formed by mixing 14.35 mL of 0.200 F HCl with 0.322 g of Na3PO4, followed by dilution to 500.00 mL?
asked by Jonny 
analytical chemistry
What is the pH at the equivalence point in a titration between 0.4450 F NH3 and 0.1520 F HCl?
asked by Jonny 
please
tell sme the answers to pig skin geogphy right now please right now please well i need them poisted
asked by gel 
maths
given function G(x)=1/3(x2)^23 2
asked by cecelia 
maths
Given g(x)= 1/3(x2)^23 2
asked by cecelia 
Quadratic equation..
Hi Can anyone tell me if this is correct X Sq  4x  16 = 0 using X = b + Sqrt b sqrd  4ac / 2a a =1, b = 4 , C = 16 x = (4) Sqrt (4)sq  4 x 1 x 16 / 2 x 1 = 4 +  Sqrt 80 = 9 + or minus 8.944/2 + = 4 + 8.944 = 12.944/2 = 6.472  = 4  8.944 = 
asked by Leo 
Physics help please
In a physics lab experiment, a student immersed 205 onecent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an
asked by Tia 
Maths
If we have p^2+p^3 how can it be simplified ?
asked by ASD 
Science
I am confused about diffusion in liquids can u explain it plz?
asked by Georgia 
physics
A figure skater is spinning at a rate of 1.7 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 62% of its original value. What is her new rate of rotation?
asked by stephanie 
Digital Logic
The input voltage to a certain opamp inverting amplifier is 10 mV, and the output is 2 V. What is the closedloop voltage gain?
asked by Matthew 
Digital Logic
How many flipflops, in a shift register, would be required to hold an initial count of 16?
asked by Matthew 
english
how is the concept of empathy illustrated and developed in Raymond Carver's "cathedral"
asked by kim 
MaTh WoRd PrObLeM
Many years ago, a cruise liner sank in the middle of the Pacific Ocean. The survivors luckily landed on a remote desert island. There was enough food for the 220 people to eat once per day; this would make the food last for three weeks. Six days later a
asked by Anonymous 
Chemistry
Can someone tell me why N2^2+ is a diamagnetic molecule based on MO theory and diagrams? I get a bond order of 2, which is paramagnetic.
asked by Andrew 
Maths
How do you work out the IQR off of a scatter graph? Thanks !
asked by Jess 
chemistry
Are 0,1,2,3 values of the orbital quantum number of a 3p electron correct? or is the values 0
asked by Km 
science
similarities+differences between a light microscope and a electron microscope?
asked by ash 
economics
What changes if any to the current condition of these tools would you make at the next meeting of the Federal Reserve Explain why and the benefitsdrawbacks of this strategy
asked by marty 
science
HELP! (UNGERT)due next week tue 11 dec :what the similarities+differences between a light microscope and a electron microscope?
asked by ash