Questions Asked on
April 29, 2011

Calculus/ Vectors
A 10kg mass is supported by two strings of length 5 m and 7 m attached to two points in the ceiling 10 m apart. Find the tension in each string. Help will be much appreciated! :)
asked by Simba 
chemistry
calculate the mass, in grams, of NaCl present in each of the following solutions. 6.25 g of 11.5% NaCl solution 452 g of 12.3% NaCl solution please show me how to do these. Thanks.
asked by pat 
physics
Distinguish between properties of the two major types of supernovae: massive star supernovae and white dwarfs. All supernovae represent the explosions of stars, but current understanding suggests there are two basic types of supernovae: one that occurs
asked by Misty 
Chemistry
A lab assistant prepared a potassium chloride solution for her class by dissolving 5.34 g of KCl in 152g of water. What is the mass percent of the solution she prepared? Could you help me set this up/show me how to do this problem?
asked by Julie 
careers school ties discussion questions
In the movie, school ties,what was dillon's pettern of prejudice/discrimination.
asked by ted 
physics
A person has a far point of 20 cm. What power glasses would correct this vision if the glasses were placed 1.9 cm from the eye?
asked by Anonymous 
Chemistry
Three solutions are mixed together to form a single solution. One contains 0.2 mol Pb(CH3COO)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2. Write the net ionic equations for the precipitation reaction or reactions that occur.
asked by Michelle 
HELP!!!!RIGHT NOW!!!!
Which set of side lengths shows similar triangles? (1 points) A) Triangle ABC : 40, 20, 50; Triangle XYZ: 10, 4, 8 B) Triangle ABC : 30, 20, 60; Triangle XYZ: 40, 60, 90 C) Triangle ABC : 110, 80, 60; Triangle XYZ: 6, 8, 5.5 D) Triangle ABC : 32, 20, 32;
asked by Dezzy 
Physics  thermal mechanical
During a workout, a person repeatedly lifts a 13 lb barbell through a distance of 1.5 ft. How many "reps" of this lift are required to burn off 100 Cal?
asked by Erica L 
math
What is the sample space for choosing a letter from the word mathematics
asked by mia 
Math
Circle C has radius 4 inches. Circle D had radius 9 inches. These two circles are connected. Point A,B,and E are points of tangency. Find AB. From point C to point D(which is the radius of circle C plus the raduis of circle D) it is 13 inches. From point C
asked by Greg 
history of art
in Picasso's masterpiece Bull's Head, which bicycle part makes up the bull's horns?
asked by Anonymous 
Math
a.)If ABCD is a parallelogram, then ABCD is (always true, sometimes true, OR never true) a rectangle. b.)The diagonals of a square (always true, sometimes true, OR never true) bisect each other. c.)If WXYZ is a rectangle, then the diagonals are (always
asked by Kim 
Algebra
How much 20% and 40% copper alloy should be mixed to yield 500 kilograms of 25% copper alloy
asked by Jenny 
Chemistry
Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
asked by Will 
chemistry
isomers of c5h12 an be separated by fractional distillation. With suitable reason, state the oder in which they will distil.
asked by sipho 
science
what was different about how alchemists and early chemists communicated their knowledge?
asked by Navi 
Physics
A rocket cruising past Earth at 0.79c shoots two bullets at 0.92c relative to the rocket with one of the bullets fired along the direction of the rocket's motion and the other fired opposite the rocket's motion. (a) What velocity does an Earthbased
asked by Darren 
Chemistry
Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
asked by Will 
Physics
A uniform 22 kg door that is 2.5 m high by 0.80 m wide is hung from two hinges that are 20 cm from the top and 20 cm from the bottom. If each hinge supports half the weight of the door, find the magnitude and direction of the horizontal components of the
asked by Kayla 
english
ndicate whether a sentence is a runon or correct. If the sentence is a runon, correct it using your knowledge of coordination and subordination. 1. My mother is very politically conservative; she’s written in King George III for president in the last
asked by Amor 
Probability
Five cards are drawn from an ordinary deck without replacement. Find the probability of getting a. All red cards b. All diamonds c. All aces
asked by Michelle 
economics
This is my son who is in 10th grade homework assignment. I want to be able to help and not look like a dope! I really have no clue! 1. Why do economists consider growth in the average labor productivity to be the key factor in determining long run living
asked by Liz 
Grammar
Can someone please check this to make sure this is right. The verbs are in quotes. Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. Mark each verb used in
asked by Angelina 
Math
Julie owns a video store. Her monthlyexpenses, including rent, average $1,185. This year she made $34,620 in revenue. What is the difference between her average monthly revenue and her average monthly expenses? HELP
asked by Jojo 
english .. Literature ..
The Crucible by Arther Miller 1 What did Tituba do in the forest? a. She danced with the girls b. She accused four women of witchcraft. c. She tried to conjure dead children. d. She sang songs of Barbados. i chose c 2 A possible motivation for later
asked by BETTY0912 
algebra
Last month, your electric bill was $25.32 for 450 kilowatthours of electricity. At that rate, what would be the bill for 240 kilowatthours?
asked by Jazmin 
Evaluating
Okay, so my sister did her resume and cover letter, and Im supposed to evaluate her, either with an G, S, or an N. So I gave her an S..which means Satisfactory. What comment should I write down for her? I can't think of what to say. I found her cover
asked by Anonymous 
chemistery
how many grams of O2 will it take to Oxidize 88 grams of C3H8 to CO and H2O
asked by kevin 
Science
Where do paramecium bursaria fit in an ecological food chain? Are paramecium bursaria a producer, consumer, or decomposer? What eats paramecium bursaria?? PLZ HELP!! THANK YOU!! :)
asked by Samantha 
Math
Could someone work this question out so I understand it. Thanks The marginal price dp/dx at x units of demand per week is proportional to the price p. There is no weekly demand at a price of $100 per unit [p(0)=100], and there is a weekly demand of 8 units
asked by Jules 
Grammar
Can someone please check this to make sure this is right. The verbs are in quotes. Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. Mark each verb used in
asked by Angelina 
physics
A pendulum consists of a mass m = 0.12 kg hanging from a flexible string of length L. The string is very thin, very light, and does not stretch. It makes small oscillations, with a period of 0.663 s. What is the oscillation frequency of the pendulum? What
asked by Joan 
Math(Please check)
You invest $3000 in a savings account where you earn 4% interest compounded continuously a) what is the formula A(t) for the balance after t years? A(t)=3000e^0.04(t) b) How long will it take for the money to double? 6000=3000e^0.04t Is this the correct
asked by Hannah 
Algebra
The gravitational force between an object & the Earth is inversely proportional to the square of the distance from the object to the center of the Earth. If an astronaut weighs 210 lbs on the surface of the Earth, what will he weigh 100 miles above the
asked by Crystal 
HCS/552
How does the Afghanistan opium black market affect the U.S. pharmaceutical industry?
asked by ELAINE 
Statistics
Cholesterol levels of adult males are approximately normally distributed with a mean of mg/dL and a listed variance of . Some researchers claim that the variance of cholesterol levels of adult males is less than . Suppose that we want to carry out a
asked by Michelle 
English
Thank you very much for your corrections. I still have a few doubts on thr following sentences. 1) You should have referred to Defoe's novels when analyzing the features of 18thcentury novels. 2) 18century novels have the following features./The main
asked by Henry 1 
Math
Could someone work this question out so I understand it. Thanks The marginal price dp/dx at x units of demand per week is proportional to the price p. There is no weekly demand at a price of $100 per unit [p(0)=100], and there is a weekly demand of 8 units
asked by Jules 
Quick Question
Listen, I am a college student. I have to do a research paper for my Enviornmental Science Paper. I need to use 8 web sources. Does any body know of some good college base sites like any dot gov sites or other sites other than dot com sites? I am going to
asked by Willy Wonka 
8th grade science
Is it probable that the sun will become a supernova? Why or why not?
asked by Kallie 
math
A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times?
asked by elizabeth 
algebra 1
A telephone pole stands exactly in the middle between two houses. The houses are 72 feet apart. If a wire is stretched from the top of the pole to the base of the house, its length is 39 feet. A. What is the distance of the pole from each house? 72/2= 36
asked by destinee 
algebra2trig
the merry go round music box has a diameter of 12.5 inches. it is scale model of a HershchellSpillman Carousel which is 35 feet in diameter. A miniature horse 5.5 inchs from the center of the music box makes one complete rotation in 27 seconds. find the
asked by Olena 
physics
How does the temperature affect the diffraction of light in a mirage ?
asked by ashley  
Geometry
My class is learning about the areas of regular polygons and circles and I'm so confused. How are you supposed to figue out the area a regular triangle inscribed in a circle when all you know is that the radius of the circle is 1.5?
asked by Sam 
Social Studies
Facts about King Philip
asked by Frances 
Algebra Please Help
I am doing Unit Analysis and I can not fugure out how to set the promble up on these 3. Am not great at these because there like word prombles can you please help. I just need to know how to set it up. 1.How many cubic meters are there in a cubic mile? (1
asked by Shawn L 
ETH/125
Write a 1,050 to 1,400word research paper in which you identify the linguistic, political, social, economic, religious, and familial conventions or statuses of four Hispanic groups living in the United States. The paper must address Mexican Americans,
asked by Meka 
Math(Please check)
1) Find the equation of the following lines: A)Through the point (4,2) and perpendicular to the line y=1/2x +1 yy1=m(xx1) The reciprical of 1/2 =2 So my answer is y2=2(x+4) or simplified y=2x+10 B)Through the point (1,1) and parallel to the line
asked by Hannah 
chemistry/ electrochemistry
1. What is the value of the equilibrium constant for the reaction occurring in the cell shown below at 298 K? Ag(s)  Ag+(aq, 1 M)  Cu2+(aq, 1 M)  Cu(s) Report your answer to four significant figures in scientific notation (1.234E3 or 1.234E3). Can
asked by Krys 
algebra
2x3y=2 x+2y=20 solve each system by sudstitution
asked by joshua 
physics
An elastic cord is 69 {\rm cm} long when a weight of 79 {\rm N} hangs from it but is 90 {\rm cm} long when a weight of 170 {\rm N} hangs from it.What is the "spring" constant k of this elastic cord?
asked by c 
physics
How will the frequency of sound change how fast the sound travels?
asked by ashley  
organic chemistry
Draw structural formula 4propyl1methylcyclohexene
asked by Tiffany 
Math(Please help)
f(x,y)=x^2  y^2 a)partial derivative with respect to x. So this means that you hold y^2 constant so would that be 0. So the answer would be 2x? b) partical derivative with respect to y. 2y
asked by Hannah 
Math(Please help)
f(x,y)=x^2 e^2x lny (2,1) I need to find the partial derivatives with respect to x and y. I have not idea how to do this especially with the (2,1).
asked by Hannah 
english .. Literature ..
The Crucible by Arther Miller 1 What did Tituba do in the forest? a. She danced with the girls b. She accused four women of witchcraft. c. She tried to conjure dead children. d. She sang songs of Barbados. i chose c 2 A possible motivation for later
asked by BETTY0912 
math
State whether the following sequence is arithmetic, geometric, or neither. 0, 1, 4, 9, 16, 25, 36, .... (Points : 1)
asked by Anonymous 
calculus
Please help find the solution to the initial value problem dy/dx=(1+2cos^2 x)/y with(y>0), and y=1 when x=0. Thanks.
asked by John 
Math(please check)
1) Differentiate the following: a) y=(x^3+5x)^6 (x^2+1)^7 (6(x^3+5x^)^5 * 3x^2+5) + (7(x^2+1)^6 *2x) * (x^3+5x)^6 b) y=(x+1)^2 / x^2 (2(x+1)*1) * (x^2)  2x *(x+1)^2 all over (x^2)^2 Are these correct?
asked by Hannah 
math
what is 25 more than 5 times and number and x
asked by sandra 
math(Please check)
Find the derivative of the following: 1=x^2+4xy+4y My answer is 2x. Is this correct?
asked by Hannah 
Algebra
Could someone tell me what I am doing right or wrong? Problem Two: 5/9 + (2/9)x = 25/7 + (6/7)x – 2/3 Like signs are not collected at the beginning. This would make the equation unequal. To make both sides equal we first multiply all sides by nine and
asked by Aria 
science
" Use the words mass, volume, and density to distinguish between gases, liquids, and solids in terms of the particle theory of matter." I don't understand what to do. Am I supposed to describe the mass, volume, and density of each fluid?
asked by Raluca 
Discrete Math
Please help with this problem. Thanks a/ Show that for any real number x, if x>1 then x^4=< 23x^4 + 8x^2 + 4x b/ Show that for any real number x, if x>1 then 23x^4 + 8x^2 + 4x => x^4 c/ Use the big Theta and big Onotations to express the results
asked by yengiang 
english
Please check grammar correctint comma splice sentences and need to use more the 1 method. Original sentence: Unfortunately Anthony did not live to see the 1920 passage of the Nineteenth Amendment giving women the right to vote,she died in 1906. My
asked by Amor 
programming
write a program that determines how many names are on the boy's and girl's list.
asked by kenya 
alegebra
how to you simplify 5 sqrt 320 how do i start
asked by lauren 
Science
Where can I find AP Environmental Science old AP exams? I need to study.
asked by Andrew 
critical and creavtive thinking
Assignment: Together We Stand Letter Suppose you live in a new suburban community. It offers all the amenities and benefits of a tightknit small community, with the benefits of living close to the big city. Some years pass, and several children and adults
asked by laura 
psychology
1. Stress can be the root cause of psychological disorders. Name four symptoms shared by acute and posttraumatic stress disorders.
asked by judyanne 
Math
How many different numbers can you create out of the five digits: 1,2,3,4,5 ?
asked by McKee 
English
Whatis Pronoun antecedent agreement?
asked by Amor 
Calculus
Express the region inside the leaf of the rose r=2sin2? in the first quadrant as an iterated integral over R?
asked by Z32 
economics
Here are data for Germany and Japan on the ratio of employment to population in 1979 and 2003 1979 for Germany is 0.33 2008 for Germany is 0.49 For Japan 1979 is 0.48 2008 is 0.51 How would I find the average labor productivity for each country in 1979 and
asked by Ling Chow 
English
I forgot to include the following doubts. Thank you very much. I included first the sentence with mistakes and then the correction. By the way, can you say "the writer of a novel/novels / the novelist"? 1)The first two themes are linked to the fact that
asked by Henry1 
Physics
A crowbar is used to wrench open a wooden crate. The crowbar is situated so that a point 8 cm from the end digging into the box acts as a pivot point. The crobar is gripped on the other side, 29 cm away from the pivot. If the person exerts a force of 110
asked by Sara 
physics
what is the answer to the following 2 physics equations: a=(v, little f in right bottom corner v little 0 in bottom right corner /t. I need it simplified to what t is and T^ 2n into the square root of L/g I need the equation simplified to get g
asked by Kelli Kenyon 
algebra
a jeweler purchased 5 oz of a gold alloy and 20 oz of a silver alloy for a total cost of $540. The next day at the same price per ounce, the jeweler purchased 4 oz of th egold alloy and 25 oz of the silver alloy for a total cost of $450. Find the cost per
asked by julie 
Physics
we are supposed to manipulate the equation and the equation is d=(1/2)at square. There are no numerical values for either question I submitted. They just wanted it manipulated down to it's simplest form
asked by Kelli Kenyon 
Business Ethics
You are a high level manager who has been asked to present a PowerPoint presentation to your employees on the concepts of stakeholders and corporate social responsibility. Your PowerPoint presentation must include the following: • What is a stakeholder?
asked by Mel 
Math(Please help)
Write the equation of the tangent line for the curve y=x^3+3x8 at point (2,6) Would I take the derivative of the equation and then plug in 2 and then plug everything into yy1=m(xx1)?
asked by Hannah 
Business
You work for the city of Bigtown's legal department. Bigtown has been trying for years to attract more convention business, but it has been unsuccessful to date. The new mayor was voted in on the tagline, "I'll make Bigtown the place to see and be seen."
asked by Anonymous 
english
it is hard to get help whit homework
asked by atiesha 
algebra
what is 2x+3y=5,3x+5y=9 in substitution form
asked by noonie 
math
Marcus flips a coin and tosses a sixsided die with the sides numbered 16. What is the probaility that he gets a head on the coin and a number divisible by 3 on the die?
asked by elizabeth 
math
A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times?
asked by elizabeth 
algebra
simplify (y+5)(y+1)
asked by Mary 
English 102
Can someone give me feedback on this please. Introduction Is samesex marriage going to create issues in our society? Samesex marriages will most likely produce issues in many political agendas. Religious leadership of Abrahamic faith everywhere will also
asked by Jennifer 
calculus
Find the volume generated by revolving the region bounded by y=18x3x^2 and y=9x about the yaxis. a. pi/12 b. pi/6 c. 3pi/4 d. pi/3 help! .. :D
asked by norm 
physics
a steel has a steel lid that is stuck tightly to the can. is it possible to open the can by running it under hot water? 1. yes 2. no 3. yes but only if the bottom of the can is submerged in ice water while the top is run by hot water. 4. no but could open
asked by HELP!!!! 
Math
The tangents to a parabola with focus (1,2) are x+y=0 and xy=o. Find the length of latus rectum.
asked by Nehal 
health
Employees from the billing department are not receiving the accurate codes and information needed for data entry, slowing production and payment for the doctor. As head of the billing department, you have been delegated to lead a problemsolving team to
asked by dennis 
math
expand in words 43560440
asked by padma 
Math
If you input 0 1 2 3 and the output is 25 43 61 79 what is the rule
asked by Jojo 
Social Studies (quick thanks)
Are there any Nfl players who are not u.s citizens
asked by Naresh Jafar 
math
If it was one adult per eight kids on a trip and a total of 54 peopple going on the trip how many of them woould be kids?
asked by debra 
History
I'm trying to find the consequences of the second great awakening and all I can find is the great awakening. How else can I look other than google? Thanks
asked by Michael 
English
I need you to check the following sentences on the same theme. Thank you very much. 1) You should start your paragraph with an introductory sentence and write a conclusion at the end. 2) Your paragraph must be preceded by an introductory sentece and
asked by Henry1 
English
I forgot to include the following sentences. Thankk you. 1) You changed very little from the notes I gave you on photocopy. You can’t include everything. Select the information you really need to answer the questions and try not to exceed the ten lines.
asked by Henry1 
French for Sydney
I typed the Geographical Expressions, etc. in Word and made a PDF to post here. Hopefully you can read it far better. FRENCH: GEOGRAPHICAL EXPRESSIONS The definite article is used with names of countries, continents, provinces, mountains, and bodies
asked by SraJMcGin 
10th Grade Commerce (LAW)
possible options of resolving an attempted murder case?
asked by Crissy XD 
Trig
Water is being pumped at a 3 cubic feet/minute into a cylindrical storage tank with a circular base of a radius 4 feet. Find the depth of the water (d) as a !@#$%^&ntion of time (t)
asked by Tara 
english
does anyone know a poem about foolish friend please write it down thank you
asked by ishika 
current events
how did workers try to control the rising temperature and pressure
asked by salwa 
Physics (please help!!!!)
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This
asked by Bon Oncle 
math
Write a function of the form Y=ax^2+c whose graph passes through the two given points (2,1),(5,20)
asked by jesaica 
Quick Question
What kinds of products are steam engines built into?
asked by Willy Wonka 
JOB INTERVIEW
What are your strengths? What are your weaknesses? What are some strengths and weaknesses?
asked by Anonymous 
algebra
tana rode a boat 1 km upstream in and hour. rowing at the same rate, she made the return trip downstream in 15 minutes. find the rate of the current
asked by lee 
accounting
if direct material is 6.69, direct labor 3.33, variable overhead 1.27, and fixed overhead .088. if your producing 2400 units what is your total fixed cost and what is the variable cost per unit?
asked by janie 
Algebra
What is the slope of the line that passes through the points (3, 3) and (2, 5)? m= 2 m= 1/2 m= 1/2 or m= 2 I came up with m=  1/2 but I'm really not sure if Im correct
asked by Mary 
math
A bag contains 7 red checkers and 11 black checkers. One checker is drawn and replaced. Then a second checker is drawn. What is the probability that a red checker was drawn both times?
asked by elizabeth 
Algebra
what is the next number in this sequence? 0.4, 2, 10, 50 choices are 110, 250, 100, 120 would it be 250
asked by mary 
algebra
What is the next number in the sequence. 0.9, 5.4, 32.4, 194.4, ... Is it 1166.4
asked by mary 
Algebra
what is the next number in this sequence? 0.4, 2, 10, 50 choices are 110, 250, 100, 120 would it be 250
asked by mary 
English
I forgot to include the following sentences. Thank you very much. 1) Sykorax’s magic is evil (maleficent has the same meaning?) since it derives from (originates from?) a pact with the devil. The novels of Defoe or Defoe’s novels, the novels by Defoe
asked by Henry 1 
Math(Please help)
Evaluate: f(x,y)=2x^3e^y a) partial derivative with respect to x. I know that you have to treat y as a constant but I have no idea what to do. I do not understand partial derivatives at all. Please help!! b) partial derivative with repsect to y.
asked by Hannah 
algebra
how do you use the substitution method to solve x + y =2 y = 2x
asked by Jessi 
algebra
solve (4x^2+2x4)  (x^25x4)= I came up with 3x^2+7 is my answer correct?
asked by Mary 
education
what does the typical public school child look like from a demographicand socienomic standpoint can you please give me an answer to this question
asked by debbie abbene 
education
What is the total budgetexpened in PK12 Pblic Schooling in the United States Break this down by individual states Please help me and give me the answer to this question
asked by debbie abbene 
math
a 4 liter bottle of water costs 1.40. the unit price is
asked by joby 
introduction to films
a scene is a series of shots joined to communicate a unified action at one time and place. Is this true or false?
asked by Anonymous 
I'm in desperate need of h
I'm in desperate need of help for a huge titration lab and finding the molarity. if I give you the problem could you help?
asked by lex 
animal help
I just found a baby bird.We think it is a red cardinal.My family is unsure what to feed it.It is newborn.What do we do?
asked by liz 
physics
• How will the amplitude affect the speed of sound?
asked by ashley  
statistics
Determine the condition on coefficients "a subscript i" so that the linear combination "Summation symbol from i=1 to n for 'a subcript i'times 'X subscript i'" is an unbiased estimate of E[X].
asked by KT 
English
Thank you very much. Here are some sentences I'd like you to check. I included my doubts in brackets. 1)They trained him to be good and not evil. (bad?). Miranda taught Caliban how to put his thoughts in(to) words without gabbling like an animal.
asked by Henry1 
calculus
what is the area bounded by x axis, x =2 and y^2 = 8x?
asked by Anonymous 
Chemistry
What happen to the mixed of copper sulfate crystals and sand when adding same water on it ?
asked by Shokofeh 
algebra
A CAN'S DIAMETER IS 3 INCHES, AND IT HEIGHT IS 8 INCHES. WHAT IS THE VOLUME OF THE CAN.
asked by ETHAN 
Math
1/(1+(1/2+1/2)^6*(2)^3)is
asked by Lori 
economics
how perfect is the competition in the market for cola drinks ?
asked by Anonymous 
spanish
what does cosas o articulos que lleva uno a la playa mean in english
asked by Daisha 
socials
how did the workers try to control the rising temperature and presure
asked by salwa