Questions Asked on
December 2, 2008

physics
Two loudspeakers emit sound waves along the xaxis. The sound has maximum intensity when the speakers are 14.0 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 54.0 cm. What is the
asked by Anonymous 
physics
A loudspeaker is placed between two observers who are 114 m apart, along the line connecting them. If one observer records a sound level of 61.6 dB and the other records a sound level of 81.3 dB, how far is the speaker from each observer?
asked by Anonymous 
physics
A source of sound (1000 Hz) emits uniformly in all directions. An observer 3.19 m from the source measures a sound level of 39.2 dB. Calculate the average power output of the source.
asked by Anonymous 
chemistry
Rank from decreasing to increasing the effect the functional groups have on the melting point of compound x: OH or COOH i think its COOH
asked by un 
AP World History
What's the best way to read the chapter? For my class. We must read the chapter, takes notes, as well as identify people and terms/concepts. We also have to answer study questions. I soon discovered an online student center where it showed an outline of
asked by Anonymous 
Biology
what enzyme do bacteria se to break down starches? List the three protozoan kingdoms. Which of thse kingdomsdo the slime molds belong to? what is the unique mode of reproduction that is characteristic of the scyphozoans?
asked by Lilit 
physics
a coin rests on a book. the book tilts until the coin just begins to move. the angle is 17 degrees. what is the coefficient of static friction?
asked by lauren 
Chemistry. What equation do I use?
A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original
asked by Sarah 
chemistry Plz help!
To make NaTcO4, Tc metal is dissolved in nitric acid to make HTcO4, NO2 and H2O. Then the product HTcO4 is treated with NaOH to make NaTcO4. If you begin with 4.5 mg of Tc metal, how much of NaOH (in grams) is required to convert all of the HTcO4 into
asked by Jordan 
Chem
Could someone explain to me how to prepare (a) zinc chloride by an acidbase reaction and (b) by a gas formation reaction. If the starting materials available are ZnCO3, HCL, CL2, HNO3, NaCL, Zn(NO3)2, and Zn. Thanks so much for any info.
asked by Tiff 
French
Can someone check my paragraph please? Merci! It's about Thanksgiving :) Mes vacances sont passées assez ennuyeuses, alors j'ai inventé des nouvelles vacances! Le mercredi dernier, j'étais rentrée à la maison quand mes parents ont dit que nous allons
asked by Samantha 
Science
How do I prepare 1% H2SO4 from concentrated sulphuric acid (96% with density 1.84g/ml)? Thank you very much for your help.
asked by Tricia 
physics
A bicycle with wheels of 70.0 cm diameter is going at a speed of 12.0 m/s.How fast is a point on the rim at the top of one of the wheels moving relative to the ground?
asked by Sandhya 
lit
the best in this kind are but shadows is
asked by donna 
health
What is a major "breakthrough" that contributed to a more scientific understanding of disease causation
asked by april 
evironmental Science
describes environmental benefits and challenges of urbanization.
asked by coreen 
graphing lines in the form
graph linear equation 3x6y9=0
asked by daniel 
Math 6th grade
Does any one know a really good websites for 6th grade math ? I'm behind in math and need to catch up or else I'll be really super dum . I need HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
asked by Emily 
LSU
Determine the surface area of a cylinder whose height is 2m and whose base has an area of 9 pi m square?
asked by Allison 
LSU
What happens to the volume of a right circular cylinder if you double its diameter?
asked by Allison 
LSU
A can of black olives has a diameter of 8 centimeters and height of 20 cm. If the can contains 15 olives, each approximately 2 cubic cm, then what is the approximate volume of the liquid filling the can?
asked by Allison 
LSU
How many 2 inch cubes will it take to make a rectangular prism that is 8 inches by 10 inches, by 14 inches?
asked by Allison 
LSU
How many 3 cm cubes will fit into a 1m cube?
asked by Allison 
Math Check
find an equation of the line contaning the given pair of points. (2,4) and (6,5) is this correct i got y=1 over 4x + 2
asked by Bryan 
check math
Find an euation of the line having the given slope and contaning the given point. m=4 over 5. (6,7) i got y=4 over 5  28 over 5 for the answear
asked by Bryan 
physics
Two loudspeakers emit sound waves along the xaxis. The sound has maximum intensity when the speakers are 14.0 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 54.0 cm. What is the
asked by Anonymous 
Diffraction
Question Details: A row of seats is parallel to a stage at a distance of 8.70 m from it. At the center and front of the stage is a diffraction horn loudspeaker that has a width of 7.50 cm. The speaker is playing a tone at a frequency of 9300 Hz . The speed
asked by Mel 
Accounting
How does the cost system work?
asked by Evan 
Accounting
How and why variances are used?
asked by Bob 
Math (Check)
Find an equation of the line containing the given pair of points (2,1) and (6,3) Is this the right answear? y=(1/5x)(3/5)
asked by Bryan 
Calculus
How do you integrate square root of (4x^2) ? Pleasee help!
asked by Megan 
ANATOMY
WHICH OF THE FOLLOWING ORGANS REGULATES INSULIN IN THE BODY? A. LIVER B. LYMPH GLANDS C. PANCREAS D. THYROID GLAND
asked by CINDY 
Math
What is the slope 5x+3y=3 3x+5y=7 is it 5/3 and 3/5 ?
asked by Anonymous 
Environemtal science
I need help explaining the four factors that produce changes in poplution and what could happen to the nutria population after all the land is depleted of the nutrias' food resources?
asked by kia 
Math
How do I solve this: ((5m^3)(3m^1)^3)/((9n^2)(4n^1))?
asked by Sam 
History
I have 3 questions 1. Which of these was not necessary to get Jamestown started in 1607? a. charter from the king b. propaganda to recruit settlers c. a jointstock company d. the headright system 2. How was Jamestown's relationship with the Indians from
asked by ken 
Algebra mat/116 appendix d
Complete the table for this equation. x y (x,y) 1 2 4 4 8
asked by Candace 
English
I NEED HELP IN TRYING TO WRITE A INTEROFFICE MEMO WITH ALL THIS INFORMATION. Background Phoenix Advertising, with its main headquarters in Charlotte, North Carolina, serves clients that include banks, insurance companies, and retail chains. You’re the
asked by Sabrina Goodridge 
fluid mechanics
The ares rocket has a liquid oxygen tank that sits on top of the core stage. The turbopump inlet for the engines on the core stage must have a certain pressure to operate correctly. The engine designer has asked you to calculate the range of pressures he
asked by memyself 
chemistry
when aluminum metal reacts with iron (III) oxide to form aluminum oxide and iron metal, 429.6 kJ of heat are given off for each mole of aluminum metal consumed, under constant pressure and standard conditions. What is the correct value for the standard
asked by sylvia 
9th grade : Algebra
How would you work out this problem? 2x+5y=10
asked by Kali 
Math
if shirt's are sold 3 for $50 how much would it cost if you bought 14 shirts?
asked by Joe 
calculus
The problem asks: A curve i nthe plane is defined parametrically by the equation x = t^3 + t and y = t^4 + 2t^2. An equation of the line tangent to the cerve at t = 1 is...? please help. thanks!
asked by Nina 
Calculus
If x + 7y = 29 is an equation of the line normal to the graph of f at the point (1,4), then f'(1) = PLEASEEE HELP!
asked by Nina 
English
What are some words that have been added to our language since people began to travel into space???
asked by myself 
Chemistry
Why do ions form?
asked by Alyssa 
Finance
If a company does not do better than its competitiors but the stock market goes up, executives do very well from their stock options. Discuss this statement.
asked by Finance 
Algebra
Here is my question: If (2, 3) and (5, 4 are the endpoints of a diagonal of a square, what are the coordinates of the other two vertices? I got (2,3) and (5,4). But the other question was: What is the area of the square? How would you find this? Do you
asked by Celina 
science
Is cell biology directly related to technology????
asked by Twilight lover 
Computer
How do you download a video from youtube into your my documents?
asked by Lena 
math
can you help me find the probability to the question? A spinner like the one shown is ued in a game. Determine the probability of each outcome if the spinner is equally likely to land on each section. Express each probability as a fraction and as a
asked by gaby 
Math
0.03 need to put it into a decimal fraction
asked by Melissa 
3rd grade
how do I write the time in three different ways for 3:50
asked by Ross 
Financeoptions
I need help on the following question. Suppose that you are the manager and sole owner of ahighly leveraged company. All the debt will mature in one year. If at that time the value of the company is greater than the face value of the debt, you will pay off
asked by David 
french
niaacd
asked by matt d 
chemistry
If H2SO4 were added to the following, would it form a salt, if so what is the name of the salt? NaCl Ca(OH)2 Hf AlCl3 H2O Mg(OH)2
asked by Bubba 
5th grade
can you unscramble the word bavrilea
asked by dominique 
Chem
will Ne or Xe have a higher boiling point? why?
asked by George 
Chemistry
What is the group 3A element that forms the most basic oxide? I thought it was TI, why isn't it? thanks
asked by Susi 
chemintermolec forces
are covalent bonds broken when.... melt benzene melt quartz boiling C2H5OH evaporating water disolving bromine in water?
asked by Jay 
Science
I can be three different states of matter, but not at the same time. I am necessary for life, but i can also destroy life. I can be under your feet, around your body, or over your head. What am I?
asked by Samantha 
english
can someone tell me what the living conditions of Shakespeare's times were like
asked by brandon 
science
what is the name of a poisionous plant like a mushroom that has 9 letters?
asked by kaitlyn 
Calculus
series: n=1 to n=inf of 6/(n^34) convergent or divergent?
asked by Shaniquaa 
Physics
The velocity of a 629kg auto is changed from 10.0 m/s to 44.0 m/s in 70.0 s by an external, constant force. (a) What is the resulting change in momentum of the car? (b) What is the magnitude of the force?
asked by Anonymous 
Physics
A 2569 kg van runs into the back of a 827 kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road can be negligible, find the initial speed of the van.
asked by Anonymous 
GEOGRAPHY
in what state are the Everglades located? What is the northernmost place on Earth called?
asked by SAMMY 
chemistry
What is formed when Na2S is added to a beaker containing amonnia solution?
asked by Mel 
Physics
Suppose that you let the masses m1 and m2 slide (without adding the third mass). a) What is the acceleration of the mass 25g? Hint: identify the force that produces the motion and the one that opposses and write the equation for the net force. b) What is
asked by lulu 
Science Olympiad Examination
Hello, Please give me some useful websites for the following subjects: Amphibians and Reptiles Bioprocess Reach for the stars(Astronomy) Disease Detectives Crave the wave Anatomy: Circulatory system, and nervouse system. The test is open book, and I want
asked by Science Olympiad Link Help 
spelling
I need some words that start with a silent consanent.(I'm not sure this is how you spell it)
asked by anya 
9th Grade Math
Hey, I finished my math homework, and im not so sure i did it correct, so can someone do this question and i will look at the answer to see if my work was correct this is State and Justification Given : m
asked by Victor 
muscular energy
what is the definition of muscular energy
asked by connor 
3rd grade social studies
1. What are the geographical (physical) features of Mexico? 2. Compare life for the Aztecs before and after the Spanish conquest. Thank you.
asked by Elaine 
6th grade Social Studies
Describe what you think are some of the positive and negative issues related to political action committees and interests groups.
asked by Tessa 
Calculus
How do I prove that the series ln(n)/(3n) is divergent?
asked by Shaniquaa 
3rd grade social studies
american indians met european explorers and shown them what?
asked by jay 
chemistry
three questions please: (1) What kinds of evidence can you use to determine if a chemical reaction has occurred? (2) How do the properties of the cooked egg differ from the properties of a raw egg? (3) how are the endothermic and exothermic reactions the
asked by lexi 
algebra
Find a linear equation in the form P = mt + b (y = mx + b), which gives the population, P, t years from 2010. This is based off of an initial population of 6,000 in 2010, with a growth of 200 ppl per year. Please show work
asked by Carmine 
HISTORY!!!
I have this test tomorrow and i have yo do this study guide and i don't no two of the questions... they are... what did the progressives support and what dod they oppose in the progressive era?!? three things for what they supported and one thing for what
asked by Ella 
8th grade
what percent of 60 is 15
asked by kyle dougherty 
grammar
In this sentence, is summer a noun even though it is a direct object? Go during the summer.
asked by Lisa 
business law
1. Goldfarb owns a 500 acre tract of land known as Blackacre. He executes a deed conveying Blackacre with the following language, “To March for life, then to Hunt.” March is excited to receive Blackacre, but soon executes a deed to the property with
asked by mike 
Science
What are the advantages and disadvantages of organic farming?
asked by Michael 
Chemistry
how do i tell if something can dissolve into another the question is which f these solvents will dissolve salt, NaCl?
asked by Mia 
Computers
An Excel workbook can contain more than one worksheet. Give two examples of a spreadsheet application where it would be necessary to have more than one worksheet and explain your answer.
asked by Mary 
Algebra
The question is: find the value of 500 dollars after 4 years invested at an annual interest rate of 9 percent (compounded continuously). I got 716.66. Is this correct? Thanks for your help!
asked by Aurelia 
Algebra
I am supposed to find how long it takes for an investment to double at an annual interest rate of 8.5%, compounded continuously. I know that e is supposed to turn into ln when you try to divide by t (or at least, I think), but how do you do this? Could
asked by Aurelia 
Math
Describe a simple process for using rates and unit prices that might help someone who is having difficulty understanding these concepts? I do not understand what this is asking, can someone explain what it is wanting?
asked by A.W. 
government
how does an iron triangle differ from an issue network?
asked by Anonymous 
Spanish
Can you please see if this is correctly written in Spanish? If not, may you please provide suggestions on how I can fix it. Thank you very much. Éstas son tres cosas necesarias para mantener una vida sana: Recomiendo que tengas un hábito alimenticio
asked by Anonymous 
government
what do believe are the most important expressed powers that the president has?
asked by Anonymous 
Amir
Please list the different types of venom that snakes give.
asked by Science Olympiad 
Social Studies
Where did the Egyptians go to expand their buisness?
asked by Imani 
Math
The school had a bake sale to raise money. A group of 11 students bought either chocolate chip cookis for $.40 cents each or brownies for $.50 cents each. The total amount they spent was $5.10. How many chocolate chip cookies and brownies did they buy?
asked by Sara 
Visual Arts
I am finding a site so I can learn advanced threepoint perspective methods. Can you help me?
asked by Anonymous 
Math
Three students came to the bake sale to shop. The sum of their ages is 33. The product of their ages is 1,320. How old are they?
asked by Sara 
12th grade English
A Lesson Before Dying Quotations Analysis. " I had gone to barbershops;I had stood on street corners, and i had gone to many suppers in the quarter.But i had never really listened to what was being said.Then i began to listen, to listen closely to how
asked by David 
history project
Is their any valuable websites about anne franks life.
asked by brooke 
history
“The Gettysburg Address” What message did the Gettysburg Address communicate to our war torn nation in 1863? How are the ideals articulate in the speech still relevant for our country today? supply as much info as possible!
asked by llauren awesome! 
Chemistry. Please check my answer!
A piece of lead with a mass of 27.3 g was heated to 98.90oC and then dropped into 15,0 g of water at 22.50oC. The final temperature was 26.32oC. Calculate the specific heat capacity of lead from these data. This is what I did. Could you check my answer? I
asked by Sarah 
government
How can the president control bureaucrats? how can congress control them?
asked by Anonymous 
math
4.5x(1.25x+130)=3x115 find the value of x and show the steps
asked by vaishnavi 
government
last question why might bureaucrats choose willingly to do things other than what they might want?
asked by Anonymous 
french
Bonjour Mme! Pouvezvous correcter mon paragraghe pour moi? En anglais, it's supposed to say: We looked for a stocking, but we couldn't find a spare, so we ended up stuffing Santa's red underwear! Nous cherchons pour un bas, mais nous ne trouvons pas un
asked by amanda 
chemistry
The molar mass of sucrose, or table sugar, is 342 grams. Calculate how many grams of sucrose are required to make 3.0 liters of 0.50M sucrose solution.
asked by Bubba 
Math
Hi, I need help understanding how to find the product: (2 1/3)*(3 1/5) Multiplication and division with mixed numbers and use the reciprocal to divide and then reduce.
asked by Mallory 
Math  help really needed
Prove each idenity. 1+1/tan^2x=1/sin^2x 1/cosxcosx=sinxtanx 1/sin^2x+1/cos^2x=1/sin^2xcos^2x 1/1cos^2x+/1+cosx=2/sin^2x and (1cos^2x)(1+1/tan^2x)= 1 I haven't even gotten 'round to sny of the quedtions because the first one is just so hard. I'm not
asked by Rani 
name of the mpuntain in east
can any one help me about finding the name of mountain in east please. thanks.
asked by bhavin 
Algebra
solve using distributive property (show all work) 3w14w=42w
asked by Jameisha 
algebra
Solve using distributive property (Show all Work) 153y=y+13+y
asked by Jameisha 
Algebra
Solve using distributive property (Shaow all Work) 8t4+3(y+7)=6y3(y3)
asked by Jameisha 
Physics help, pl0x
A 1.0 times 10^3 kg elevator carries a maximum load of 800.0 kg. A constant frictional force of 4.0 times 10^3 N retards the elevator’s motion upward. What minimum power, in kilowatts, must the motor deliver to lift the fully loaded elevator at a
asked by Anonymous 
9th grade
for my physical science class were supposed to name ionic compounds and change the name into a formuala but i don't understand how to do it my teacher didn't explain it fully. Ex:Na2CO3= Sodium Carbonate Sodium phosphide=Na3+P3
asked by Evan 
Trig
Find all the solutions in the interval [0,2pi). 2sin2x  sqrt(2) = 0 sin2x = sqrt(2)/2 I'm confused by the double angle. Please help.
asked by Travis 
geography
I need name of some mountain in east america. please help
asked by bhavin 
Spanish
Please see if this is correctly written. If there are any mistakes, please feel free to correct me. Thank you for your time. Éstas son tres cosas necesarias para mantener una vida sana: Recomiendo que tengas un hábito alimenticio equilibrado o nutritivo.
asked by Anonymous 
Math  help really needed
I'm sorry to double post; I don't want to seem impatient, but I really need help with this. Prove each idenity. 1+1/tan^2x=1/sin^2x 1/cosxcosx=sinxtanx 1/sin^2x+1/cos^2x=1/sin^2xcos^2x 1/1cos^2x+/1+cosx=2/sin^2x and (1cos^2x)(1+1/tan^2x)= 1 I haven't
asked by Rani 
ap world history
what effect did the indian ocean trade have on have on the societies that take part in it? what factors determine the extent or the significance of the effects of trade on society?
asked by autiana 
physics
The pressure in a constantvolume gas thermometer is 0.700atm at 100 deg. Celsius and 0.512atm at 0 deg. Celsius. a) What is the temperature when the pressure is 0.0550atm? b)What is the pressure at 500 deg. Celsius?
asked by Becky 
1301 Education
The meaning of 3 S to a T
asked by Graciela 
physicsHELP
Suppose that you let the masses m1 and m2 slide (without adding the third mass). a. what is the acceleration of the mass 25g? Hint: Identify the force that produces the motion and the one that opposes and write the equation for the net force. b. what is
asked by kim 
poetry
ok so im supposed to create a poem about child abuse...and i have some good ones but i totally just got writers block and i need help..here is part of the poem, any suggestions MY PAIN it started with a pen and paper... i write my emotions without thinking
asked by symantha 
ap world history
how did geography affect the trade patterns of africa and of asia during the time period of 300 bce and 1000 ce?
asked by autiana 
social studies
Need help with project. what are essential ideans that are included ina POLICY of imperialism relating to renaissance europe
asked by colby 
ap world history
why did buddhism and christianity spread when ans as it did in 300 bce to 1000 ce?
asked by autiana 
ap world history
are there substantial similarites between the orgins and the devolpment of the silk road and transsaharan trade?
asked by autiana 
math
3 4 ×8y4
asked by ??????? 
English
What does Martin Luther King mean by "Continue to work with the faith that unearned suffering is redemptive?"
asked by Jason 
math
A log is cut into 4 pieces in 12 seconds. At the same rate how long would it take to cut the log into 5 pieces? HINT: the answer is not 15
asked by Dezy 
11th grade
why did the religons of buddhism and christianity spread when and as it did in africa during 300 bce?
asked by michelle 
spanish
I need help.. i need to make 4 sentences.. With... (Miro) (Miramos) El, la, al, a la empleado video carpeta profesora I don't care how u make them i just need help..
asked by dan 
English
Virgil is not afraid to trade on the rather extreme level of the Purdy's ignorance? Why does he do so and what does he expect to gain? I don't understand this question. Anyone care to explain. Thank you
asked by Larry 
8th Grade Algebra
Draw two squares of appropriate size to compare the areas of Alaska (591,004 miles squared) and Texas (266,807 miles squared). * I don't get how to set up and do this problem.
asked by Joy 
Chemistry
A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original
asked by Jordan 
Business Law
Goldfarb owns a 500 acre tract of land known as Blackacre. He executes a deed conveying Blackacre with the following language, “To March for life, then to Hunt.” March is excited to receive Blackacre, but soon executes a deed to the property with the
asked by John 
5th grade Geomentry
I am a location in space. it takes only one letter to name me.
asked by Asad 
Chemistry
what are the order intermolecular forces according to strength??
asked by Andrew 
health
What are the five stages of a human's life cycle?
asked by Anna 
8th grade geometry
segment AC is congruent to segment AD by the ______ of the Isosceles Triangle Theorem. (8 letters, 5th=E, 7th=S) Please help!
asked by girl 
Education
Standardsbased education can sometimes put pressure on teacher to be sure they 'measureup' to the expectations of state standards. How can teacher accountability have a positive and a negative influence on the classroom environment? Respond to
asked by Dawn 
u.s.history
how many years was george bush in office?
asked by j25 
Education
What are the implications on NCLB on teachers; on students in the classroom; and on schools and school districts?
asked by Dawn 
significant figures
how do i make 1020 to 2 sig figs? it cant round to 1100..
asked by s 
Math  please elaborate
can someone please further explain my question on? it's just a farther bit down. The subject is "Math  help really needed" I think I almost got the answer, but I'm not sure where to go from there. really appreaite all the help so far as well; thank you.
asked by Rani 
i need help please!!
Suppose that you let the masses m1 and m2 slide (without adding the third mass). a) What is the acceleration of the mass 25g? Hint: identify the force that produces the motion and the one that opposses and write the equation for the net force. b) What is
asked by lulu 
physics
Posted by Anonymous on Tuesday, December 2, 2008 at 12:43am. A loudspeaker is placed between two observers who are 114 m apart, along the line connecting them. If one observer records a sound level of 61.6 dB and the other records a sound level of 81.3 dB,
asked by Anonymous 
physics
Two loudspeakers emit sound waves along the xaxis. The sound has maximum intensity when the speakers are 14.0 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 54.0 cm. What is the
asked by Anonymous 
8th grade
3x^2  1/3 = ? please show steps
asked by Spanky 
physics
A car moving at a speed of approximately 176.5 km/h. 923 m in front of the car, there is a truck moving at a speed of 84.2 km/h in the same direction. 1.What is the name of the physical process that would occur if both vehicles kept moving at constant
asked by Sandhya 
college
I am looking for a poem " I am What I am", I need help critiquing this poem.
asked by Tamyka 
calculus
Let f and g be differentiable everywhere. If g is the inverse of f and g(2)=5 and f'(5)=1/2, then g'(2)=? PLEASE HELP! Thanks
asked by Megan 
calculus
integrate: square root of (4x^2)
asked by Jenny 
Thermochemistry
I'm confused about the difference between the q in q=mc(TfTi) and (Delta)H, or enthalpy. What exactly does enthalpy mean and how is that different than q? (I'm also confused about what Gibbs Free Energy actually means; I know that if it's negative, the
asked by Kevin