Questions Asked on
August 7, 2010

physis
The range of human hearing is roughly from twenty hertz to twenty kilohertz. Based on these limits and a value of 343 m/s for the speed of sound, what are the lengths of the longest and shortest pipes (open at both ends and producing sound at their
asked by Anonymous 
college chemistry
When solutions of AgNO3 and NaOH react, the balanced molecular equation is 2AgNO3(aq) + 2NaOH(aq) Ag2O(s) + 2NaNO3(aq) + H2O(l) How much Ag2O is produced when 0.200 g of AgNO3 and 0.200 g of NaOH react?
asked by michelle 
math
The amount of corn chips dispensed into a 12ounce bag by the dispensing machine has been identified as possessing a normal distrubution with a mean of 12.5 ounces and a standard deviation of 0.2 ounces. What porportion of the 12 ounce bags contain more
asked by Jeannie 
chemistry
how many grams of 5%NaNO3 will be required to prepare 250ml solution
asked by amruta 
science
a 5.o kg book is sitting on a table. which describes the forces acting on the book? a)there are no forces acting on the book b)the net force on the book is zero Since the weight of the book is cancelled out by the support of the table. does that mean a)
asked by nancy 
US History
In the Watergate Scandal, I know that 5 men broke into the Democratic National Committee headquarters and Nixon did not want to give up the tapes that revealed that he wanted to cover up the break in... why? 1) Did Nixon put up the tape recording system in
asked by Amy~ 
math
In a quadrilateral ABCD, the diagonal AC bisects angle BAD and AB = BC = CD. Prove that the other diagonal, BD, bisects angle ADC.
asked by mathsen 
Chemistry
which of the following equations is the one represented by this experiment? Justify your answer by comparing the moles of iron consumed(Fe 0.139/0.0419= 3.32) and the moles of copper produced(Cu 0.0419/ 0.0419 =1) to the coefficients in the equation of
asked by Ashley 
organic chemistry
which of the 3 solvent would not be suitable recrystallization solvent for acetanilide? Why?  water as recrytallization solvent for acetanilide  chloroform as recrystallization solvent for acxetanilide  methanol as recrystallization solvent for
asked by Janine Faeldonia 
math
In a pentagon ABCDE, AB = AE, BC = ED and BD = EC. Prove that AC = AD.
asked by mathsen 
Microeconomics
A sporting goods store has estimated the demand curve for a popular brand of running shoes as a function of price. Use the diagram to answer the questions that follow. a. Calculate demand elasticity using the midpoint formula between points A and B,
asked by Monica 
biology
What is the source of energy driving the hydrolic cycle? a. evaporation of the ocean water b. heat conducted from the earth's core to the surface c. radiant heat from the sun d. air currents returning to the earth's surface I chose a) evaporation of the
asked by nancy 
math
Let ABC be a triangle such that angle ACB = 135 degrees. Prove that AB^2 = AC^2 + BC^2 + ¡Ì2 x AC x BC.
asked by mathsen 
math
Simplify sin(theta)* sec^2(90theta)
asked by Seven 
Physics
A uniform solid sphere of mass 4kg and diameter 20cm initally at rest, begins to roll without slipping under the influece of gravity, down an incline that makes an angle of 15degrees to the horizontal 1 calculate the angular acceleration of the sphere 2
asked by Dermot 
Statistics
a random sample of 10 minature tootsie rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were 3.087, 3.131,3.241,3.270,3.353,3.400,3.411,3.437,3.477 a.) construct a 90 percent confidence intervalfor the true
asked by BabyGirl 
medicine
What is the main difference between a stem cell and a cancer cell? A. A stem cell grows at a faster rate than a cancer cell B. A stem cell obeys signals to stop growth, but a cancer cell doesn't C. A stem cell is usually external; a cancer cell is usually
asked by Beth 
Math
a roof rises 1.9 feet vertically and 9.1 feet horizonally. what is the grade of the roof?
asked by Norma 
math
a solid alumimium casting for a pulley consists of the discs each 1 1/2 cm thick of diameters 4 cm, 6 cm,and 8 cm.a central hole 2 cm in diameter is drilled out .if the density of the alumimium is 2.8g/cm^3,calculate the mass of the casting
asked by kolapo 
elementary math
A student has a penny, nickel, dime, and quarter distributed two coins apiece to his front two pants pockets. What is the probability that the front right pocket has more than 30¢ in it?
asked by jojo 
math 30 applied
A small aircraft leaves Calgary on a heading of E30deg S (30 degrees south of east) travelling 200 km/h. it is affected by a 40 km/h wind blowing toward S60deg W (60 degrees west of south). After one hour the plane’s position relative to Calgary will be?
asked by jim bean 
CHEM 1B
Carboxylic acids are stronger acids than alcohols A. This is because the carboxy anion is delocalised. B. This is because the hydrogen atom is delocalised. C. The OH bond in carboxylic acids is very strong. D. This statement is not true One characteristic
asked by Lucinda 
english
briefly summarize the four stages of the transformational learning cycle
asked by sharon 
Popular American Culture
Prepare a 350 to 700word paper in which you examine trends in popular American culture. In your examination, be sure to describe at least one trend from the following areas: a. Social b. Political c. Personal d. Religious
asked by Tanya 
Inverse Functions & Trig. Equations
7. Evaluate sin[sin^1(1/2)]. a. 1/2 b. ð /6 c. 1/2 d.  ð /6 8. Evaluate cos[tan^1(5/12)]. a. 12/13 b. 12/5 c. 5/12 d. 5/13 9. Evaluate cos[sin^1(3/5)]. a. 4/5 b. 5/4 c. 4/5 d. 3/4
asked by Claire 
Algebra
FiveSixths of a number is 60. What is the number?
asked by Me 
math
Find the exact value of sin(cos^1(1/3))
asked by Seven 
math
Solve 2 + cos^2(theta)=3sin^2(theta) for 0=< theta < 360
asked by Seven 
algebra
Hockey teams receive 2 points when they win and 1 point when they tie. One season, a team won a championship with 61 points. They won 11 more games than they tied. How many wins and how many ties did the team have?
asked by Jackie 
algebra
Soybean meal is 16% protein: cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320lb. mixture that is 14% protein?
asked by Jackie 
MTH233/statistics UOP
You work for the public relations department of the Social Security Administration. In an effort to design better advertising campaigns, your department decides to conduct a survey to find out the opinions people in the United States have about the Social
asked by sue 
math
P (1.3 less than or equal to Z less than or equal 0) P (1.3 ¡Ü Z ¡Ü 0)
asked by donna 
science
a certain's plant root contain higher concentrations of nitrate than the soil that surrounds them. Which mechanism explains the movement of nitrates form the soil into the plant's roots? a)osmosis b)facilitated diffusion c)active transport d)filtration I
asked by nancy 
English 301
Hi there, i am writing an analytical essay for William Shakespeare's "Hamlet". My essay topic is this.... In Hamlet, Shakespeare reveals the effect of conflict on a person’s character. Write an essay demonstrating how Shakespeare uses a character's
asked by Danielle 
english
choose two age groups from different periods in to th the physical development process
asked by sam 
algebra, adding rational expressions
2/zy^2+7/z^2y
asked by Armelia 
medicine
A patient was admitted in an alternating state of mania and despair. What diagnosis does this statement describe? A. Obsessivecompulsive disorder B. Bipolar disorder C. Posttraumatic stress disorder D. Anxiety I'm not sure if it's B or D
asked by Beth 
Statistics
Here are heart rates for a sample of 30 students before and after a class break. At á = .05, was there a significant difference in the mean heart rate? Heart Rate Before and After Class Break (a) State the hypotheses. (b) State the decision rule and
asked by Cindy 
organic chemistry
account the difference in the crystals formed through rapid and slow crystallization.
asked by Janine Faeldonia 
Algebra
I am working on Factoring the Trinomial and need help to solve this equation: t=3t^3+22t^2+8t
asked by Joyce 
asessment
a very young child takes off his socks. the caregiver puts it back on, the child takes it off again repeating it. child is engaged in play (d) (a)functional b. constructive c, rulebased d. dramatic 2. which of the foll. is best suited to a formative
asked by action 
math
Factor: x^8 + 2x^4 y^4 + 9y^8
asked by cosca 
math
Let P and Q be the points on the sides AB and BC of a triangle ABC respectively such that BP = 3PA and QC = 2BQ. Let K be the midpoint of the segment PQ. Prove that the area of the triangle AKC is equal to 11S/24, where S is the area of the triangle ABC.
asked by mathsen 
elementary math
How many different ways can a committee of 9 be selected from a larger organization of 20 people?
asked by jojo 
Statistics
Thomas economic forecasting, Inc. and Harmon econometrics have the same mean error in forecasting the stock market over the last ten years. However, the standard deviation for Thomas is 30 points and 60 points for harmon.At the .05 signifcance level can we
asked by Anonymous 
algebra
Determine whether the given numbers are a soluation of the inquality. 3,12,17,1 y  9 > 2y  4
asked by Jackie 
Chemistry
Which of the following has the higher ionization energy and why: Li or Ba? I cannot figure this out because they are in different periods but Ba is down on the periodic table telling me that it may have a higher ionization than Li. Help please?
asked by Ashley 
MATH
Could someone please show me how to solve this Prove tan(theta) = tan(theta)
asked by Please Answer 
Math
I factored 3.6x^6+2x^62.8x^2+3.2x as; 3.6x^7+2x^62.8x^2+3.2x However my answer is incorrect. The correct answer should be; 0.4x(9x^6+5x^57x+8) How do I get to the correct answer? So that I am able to do similar problems, because every problem that I
asked by Lynn 
algebra
what is the solution set to 5x+7=22
asked by Anonymous 
medicine
A patient has unrealistic thoughts and behaviors despite an awareness that they're inappropriate. She's experiencing A. Phobia B. paraphilia C. panic attack D. obsessivecompulsive disorder I think it's D
asked by Beth 
Math
solve the system: y^2=1x^2 y^2=x^23x+2
asked by PLEASE ANSWER THIS !!! 
algebra
I am a manager at a hospital i have 1,176 hours in a week to be covered by my staff. How many 40 hour people would I need and how many 32 hour people would I need to cover the hours.
asked by Joyce 
psych
Can you tell me if I have this right? Are the major schools of psych? Structuralism, Behaviorism, Functionalism, Psychoanlysis, and Humanism? Just want to make sure I have the right ones. Thank you
asked by diana 
math
expand (1x^2)^6 ?
asked by Stace 
math
2/3/10=1.8/r
asked by michelle 
English
In the New Testament, what word is used to identify letters the disciples sent to each other?
asked by Linda 
stats
Compute the following and show your steps 7! /5!.
asked by renae 
Math
Could someone please show me how to solve this Prove tan(è) = tanè
asked by Seven 
math
Could someone please help me answer this Prove tan(theta) = tan(theta)
asked by Seven 
math
how many solutions does the equation 2cosX = sqaureroot(X) have?
asked by Seven 
math
rewrite the statement using percent notation out of every100 eligible people 87 voted in a recent election
asked by michelle 
algebra
Solve by elimenation 0.3x 0.27 =4 0.2x + 0.3y = 37/17
asked by Jackie 
algebra
Write interval notation for the set {x4 < x < 4 
asked by Jackie 
KIDNEY!!
The size of loop of Henle in every person is same ???
asked by Mesut 
math
P(Z greater than 2.5)
asked by donna 
math
Gasoline is 2.79 a gallon, if you use 2 3/4 gallons a day driving to and from work, how much should you budget for 20 days? Now, would I multiply? $2.79 x 2.75 then multiply that number by 20 days?
asked by Keirra 
US History
In Richard Nixon v. Supreme Court are the main characters only Nixon and the Supreme Court?
asked by Amy~ 
gemorty
what supplementry means
asked by danyle 
nursing
What type of information appears in a histology report? A. Tissue structure B. Synechia C. Blood type D. Bone health I think it's C but at this point i'm guessing. I really need help!
asked by Mel 
health
Who in the organization should be involved in performance improvement projects and why?
asked by cortez 
Math
4 3 1 1 2 1 2 3 What's the pattern and the next numbers of this sequence?
asked by Thales 
nursing
A patient had a cystectomy. What does the root of this word mean? A. Kidney B. Tube C. Bladder D. Meatus I chose C A pyelogram was performed on a 43yearold patient. The root word means A. trough, basin, pelvis B. ureter, urethra C. bladder, urine D.
asked by Mel 
medical terminology
A patient is diagnosed with Addison's disease, which is caused by decreased functioning of the adrenal cortex. Which of the following medications may be prescribed? A. Glucotrol B. Humulin C. SoluCortef D. Pitressin My answer is C (i think)
asked by Nicole 
system design
which of the following is on of the four fundamental issues IS managers must address. 1. IS Specialist salaries, career preparation, infrastructure or an organization. I think it is either Infrasture or an Organizations mission
asked by yog 
US History
There was this website that said that one of the conflict of Roosevelt v Supreme Court was NRA. Would NRA be the National Recovery Act? I think it is since it is related to the Roosevelt and the Supreme Court based on the websites that I searched. Just to
asked by Amy~ 
organic chemistry
describe the crystals formed through slow crystallization
asked by Janine Faeldonia 
organic chemistry
what type of impurity is associated with large crystals? Explain.
asked by Janine Faeldonia 
Chemistry
what is the final temp of the combination when 50 grams of chromium at 15 degrees celcius is added to 25 milliliters of water at 45 degrees celcius?
asked by Nick 
math
Solve x = y^3  4 for y in terms of x
asked by CaN yOu AnsWeR tHis 
math
Thank You for taking the time to look at this. If x = 2cos^2(theta) and y = sin2(theta), show that (x 1)^2 + y^2=1
asked by CaN yOu AnsWeR tHis 
Math 157
I am having some trouble figuring out these two problems. 1. Calculate the mean, median, mode, range, and midrange for the data set given {1, 7, 0, 14, 2, 15, 0, 8, 7} Mean=2 Median=7 Mode=0, and 7 Range= Midrange= 2. Calculate the mean, range,
asked by Rayna 
psy/220
explan how you believe and individuals attachment style can affect the types of love relationships he or she has.
asked by hogie 
math
Factor: a^4 + b^4 + c^2  2(a^2 b^2 + a^2 c + b^2 c)
asked by cosca 
math
Prove that: 20^22  17^22 + 4^33  1 is divisible by 174.
asked by mathsen 
math
Prove that if p, q, r and s are odd integers, then the equation x^10 + p x^9  q x^7 + r x^4  s = 0 has no integer roots.
asked by mathsen 
math
For which real values of b do the equations x^3 + b x^2 + 2bx  1 = 0 and x^2 + (b1)x + b = o have a common root?
asked by mathsen 
math
Is it possible to arrange the integers from 1 to 240 in a table with 15 rows and 16 columns so that the sum of the numbers in each of the columns would be the same?
asked by mathsen 
math
Simplify: 2/1!  3/2! + 4/3!  5/4! + ... + 2010/2009!  2011/2010!, where k! denotes the product of all integers from 1 up to k, that is, 1! = 1, 2! = 1x2 = 2, 3! = 1x2x3 = 6, and so on.
asked by mathsen 
math
Prove that a^4 + b^4 + c^4 ¡Ý b^2ac + c^2ab holds for all real numbers a, b and c.
asked by mathsen 
math
Prove that if real numbers a, b and c satisfy a + b + c > 0, ab + ac + bc > 0 and abc > 0, then each of a, b and c is positive.
asked by mathsen 
sociology
Focus of the Research Paper Select one social institution family, healthcare, religion, education, mass media, political, or economic (family being my choice) as defined in the text. Using the three Sociological theories listed in chapter one of the text
asked by nnn 
Math
Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in days, is graphed on a rectangular coordinate system where time is on the horizontal axis. Further suppose that the number of cars driven on 1st Avenue can be modeled by
asked by Crissy