1. Archives
  2. 2011
  3. October

Questions Asked on
October 15, 2011

  1. chemistry

    Calculate the mass of NO2 produced from the decomposition of copper nitrate if .462mol of oxygen are formed. The equation for the reaction is 2Cu(no3)2 - 2CuO + 4NO2 +O2

    asked by wendy

  2. physics

    Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as in Figure 7.10, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic

    asked by riley

  3. chemistry

    Mass of tablet is 1.3183g, concentration of HCl 0.1807M, concentration of NaOH 0.1481M, volume of NaOH used 20.36 ml then milimoles of HCl added ?, milimoles of NaOH used ?

    asked by Anonymous

  4. physics

    A 4.63-g bullet is moving horizontally with a velocity of +349 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is

    asked by riley

  5. statistics

    a die is rolled 7 times. find the probability of getting at least one 3.

    asked by Gracy

  7. Poetry

    Beyond tone, a poet's attitude toward his or her subject reveals to us a poem's A. subject. B. structure. C. diction. D. theme.

    asked by Linda

  8. Social Studies 9

    Similarities and Differences between lord protector and reign of terror. PLEASE I NEED HELP !!!!

    asked by Stephanie

  9. calculus

    If a snowball melts so that its surface area decreases at a rate of 4 cm2/min, find the rate at which the diameter decreases when the diameter is 9 cm.

    asked by John

  10. physics

    A block of mass 2kg placed on a long frictionless horizontal table is pulled horizontally by a constant force F. It is found to move 10 m in the first two seconds find the magnitude of F

    asked by Beli

  11. Chemistry-Bob please help-Thanks

    Hi, Please advise on the following: - A procedure for the determination of Impurities A & B in a compound says to use a 4.6 x 150mm x 3um column (stationary phase: octadecylsilyl silica gel). The relative retention time with reference to the Principal Peak

    asked by anne

  12. nonfiction

    Thoreau writes that people should be "mining themselves for gold." By this he is stating, in another way, the ideal of Socrates, which was to A. know thyself. B. deny thyself to learn what is valuable. C. live and let live. D. put first things first

    asked by Linda

  13. owning

    The __________spells out the new owner's repayment obligations when finacing a new or used vehicle. A.lone agrrement B.sticker C.buyer's guide D.loan application i got A

    asked by Ciara

  14. geometry

    A square has side lengths of 4x - 3 and 2x - 5. What is the area of the square?

    asked by ezekiel jones

  15. physics

    The drawing shows a human figure approximately in a sitting position. For the purposes of this problem, there are three parts to the figure, and the center of mass of each one is shown in the drawing. These parts are: (1) the torso, neck, and head (total

    asked by riley

  16. cultural diversity

    I already talked about skin tone and using IAT test to do a survey I need to know what other measurements sociologists utilize to calculate prejudice

    asked by Anonymous

  18. owning

    The __________is the contract that seals the deal when you buy a car. A.loan application B.warranty C.loan agreement D.sales agreement i got C

    asked by Ciara

  19. Physics 114

    You are riding in a boat whose speed relative to the water is 7.2 m/s. The boat points at an angle of 25.7° upstream on a river flowing at 14.1 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 24.5 m wide.

    asked by Anmol

  20. Physics

    Relative to the center of the Earth, the position of the Moon can be approximated by (t) = r [cos (ωt) + sin (ωt) ], where r = 3.84 108 m and ω = 2.46 10-6 radians/s. (a) Find the magnitude and direction of the Moon's average velocity between t = 0 and

    asked by Anmol

  21. biology

    A 28.0-g sample of ice at -18.0°C is mixed with 124.0 g of water at 85.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g · °C, respectively, and

    asked by layla

  22. chemistry

    A 13.0-g sample of ice at -13.0°C is mixed with 105.0 g of water at 78.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g · °C, respectively, and

    asked by layla

  23. freefall

    An airplane is dropping bales of hay to cattle stranded in a blizzard on the Great Plains. The pilot releases the bales at 160 {\rm m} above the level ground when the plane is flying at 70.0 {\rm m}/{\rm s} 60.0^\circ above the horizontal.How far in front

    asked by hoda

  24. Biology (genetics)

    The RAS protein acquires a mutation that prevents release of GTP. Which of the following characteristics are these cells likely to acquire? a)Self-sufficiency in growth signals b) insensitivity to anti growth signals c) angiogenesis d) metastasis e)

    asked by Bach

  25. English

    I've chosen five sentences but I hope the other were possible.Thank you. 1) What are people intolerant about (is "of" also possible)? They are intolerant about the color of the skin, religion and clothes. 2) In the past, she got hurt (is "offended"

    asked by Henry2

  26. science

    what is the discharged rate of water leaking at a 4 inches diameter pvc pipe with pressure of 35 psi and a leak hole of 5 mm in diameter

    asked by kristofer ian arbolonio

  27. physics

    A cannon is used by the department of forestry to launch containers of fire retardant on to a fire. the cannon is at a distance of 1kilometre from a cliff that is 0.5kilometre high from the ground and the fire is 1kilometre away from the base of the cliff.

    asked by Abel

  29. HELP-PROBLEM SOLVING IN MATHEMATICS

    a piece of wire of length 136(pai) is cut to form 8 circles. the radius of the circles differ from each other, in sequence, by 1 cm. a) find the radius,r b) find the number of complete circles that can be formed if the original length of the wire is

    asked by alya

  30. QM

    I have borrowed a sum of $150000 for buying house at 12% simple interest per year at the beginning of a year.The loan has to be repaid by three payment of $10000,$30000 and $X at the end of February, July and November of the same yaer respectively. Find

    asked by chan

  31. chemistry

    A certain compound contains only vanadium and oxygen. A 35.00 g sample of the compound contains 19.61 g of vanadium. Determine the empirical formula of this compound.

    asked by NONO

  32. physics

    Two balls have the same mass of 0.525 kg and identical charges of 13.0 μC. They hang from the ceiling on strings of identical length as shown in the figure. If the angle with respect to the vertical of the strings is 22.0°, what is the length of the

    asked by onder

  33. physics

    from short to long bondpaper

    asked by Anonymous

  34. chemistry

    what are the three modes of expression of percentage concentration?

    asked by LENZIESH

  35. history

    The entrance to many Egyptian tombs was inscribed with a course or warning,designed to protect the tomb from raiders who might want to steal the treasures within.What would you write to warn off tomb raiders?

    asked by kina

  36. Epidimiology

    In a hypothetical study, 1000 patients attending a hospital general outpatient department were tested for diabetes using the following two tests:  Fasting blood sugar (FBS)  Glucose tolerance test (GTT) There were 100 patients who had a positive GTT,

    asked by Sofya

  37. spanish

    should I use desde, desde hace or hace in this sentence ------ poco compre un coche

    asked by jill

  38. English

    I urgently need to know if the following sentences are all possible. Thank you. 1)I didn't know your address but I manged to/was able to/ (but not could) find you. 2) When I was young, I was able/could play the guitar quite well. 3) I called Mary many

    asked by Henry2

  40. Math

    A piece of rope is cut into three pieces in the ratio 2:7:11. If the longest piece is 72cm longer than the shortest piece, find the length of the original rope. Ps: how do I do this type of question? What are the fixed steps?

    asked by StuartKess

  41. physics

    An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 5.1 N; a second force has a magnitude of 4.3 N and points in the negative y direction. Find the direction

    asked by anonymous

  42. Math

    Lee Holmes deposited $16,600 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $41,600 at 9% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s

    asked by Lydia

  43. physics

    When you push a 1.70 kg book resting on a tabletop it takes 2.60 N to start the book sliding. Once it is sliding, however, it takes only 1.50 N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction between

    asked by anonymous

  44. Algebra 2

    f(x)=x^3-7x^2+10x+6 (find the zeros of this quadratic equation)

    asked by jay

  45. Algebra 2

    Describe the end behavior of the graph of the polynomial function. Then evaluate the function for x=-4, -3, -2, -1, 0, 1, 2, 3, 4. Then graph the function.y=x^4-2x^2-x-1 and y=(x-3)(x+1)(x+2)

    asked by jay

  46. physics

    A 747 jetliner lands and begins to slow to a stop as it moves along the runway. The mass is 3.8 105 kg, its speed is 25.9 m/s, and the net braking force is 4.27 105 N.

    asked by helpplease

  47. film

    Was Heather Duke smart in the movie Heathers

    asked by Rainy

  48. Algebra 2

    Describe the end behavior of the graph of the polynomial function. Then evaluate the function for x=-4, -3, -2, -1, 0, 1, 2, 3, 4. Then graph the function. Number one: y=x^4-2x^2-x-1

    asked by jay

  49. egd

    hi what notes go on the floor plan.can youu please help

    asked by kyle

  51. social studies

    who is the mayor of Susquehanna?

    asked by Jennifer White

  52. social studies

    what is the population in Susquehanna?

    asked by Jennifer White

  53. social studies

    what are the metropolitan area of Susquehanna?

    asked by Jennifer White

  54. social studies

    what landmarks and attractions are in Susquehanna?

    asked by Jennifer White

  55. English

    Could you check this sentence for me, please? Thank you. She offered/agreed/promised to drive me to the airport.

    asked by Henry2

  56. Proof read please

    I am entering an essay scholarship and would love if some of you could proof read my essay. Thanks so much! Title: Be a Part of Something Greater “You have to get involved!” From the first day of school, freshman year of high school, those were the

    asked by Samantha

  57. Alegebra

    In which quadrants could a point be located if its coordinates are reciprocals to each other

    asked by Tonya

  58. PHI103 Informal Logic

    Assume Mary is forced to let her children go hungry or steal some food from a local grocery store. Which should she do? Construct an argument that supports Mary's decision to steal the food or an argument that shows why Mary should not steal the food.

    asked by lizzie

  59. Calculus (Discontinuity)

    Suppose f(x) = [sin(x^2 - 4)]^ -1. Identify any points of discontinuity, and determine (giving reasons) if they are removable, infinite, or jump discontinuities. Okay, I presume that the [ ] brackets denote the greatest integer function (int () ). Once I

    asked by Mishaka

  60. EEE

    the solve of the shipment of 10 items has 2 items defective and 8 items are non defective.IN THE inspection of the shipment a sample of items will be selected and tested.if a defective items is found the shipment of 10 items will rejected.in a sample of 5

    asked by ibrahim

  62. Stats

    I. Use Chebyshev’s theorem to find what percent of the values will fall between 183 and 227 for a data set with a mean of 205 and standard deviation of 11. II. Use the Empirical Rule to find what two values 99.7% of the data will fall between for a data

    asked by Jennifer

  63. Stats

    A Math test has a mean of 51 and standard deviation of 5.0. Find the corresponding z scores for: I. a test score of 64 II. a test score of 47

    asked by Jennifer

  64. Stats

    Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your work. 0 1 6 8 9 9 8 6 3 1 0 9

    asked by Jennifer

  65. Stats

    A set of 50 data values has a mean of 15 and a variance of 36. Find the standard score of a data value = 30

    asked by Jennifer

  66. computer

    suppose the 640GB western digital hard drive install in the RAID array has failed, find a replacement drive as close to this drive as possible. print three web pages showing the size, features and price of three possible replacement

    asked by Anonymous

  67. law

    An alternative to an hourly rate is a/an __________ rate. (Points: 5) cost advertised family fixed Is it "Fixed"

    asked by John

  68. English

    Please check for any errors in my paper. And crrect the errors for me. Let me know if there is anything I need to change. The Lottery takes place on a beautiful summer day in a small day in a small town.However, the the location of the town, is never

    asked by Adrian

  69. physics

    When you push a 1.70 kg book resting on a tabletop it takes 2.60 N to start the book sliding. Once it is sliding, however, it takes only 1.50 N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction between

    asked by Stephanie

  70. Drama

    The ability of writers to completely identify with their characters is A. hypocrisy. B. ambiguity. C. negative capability. D. satire.

    asked by Linda

  71. physics

    A spring with a force constant of 100 N/m is used to push a 0.27 kg block of wood against a wall, as shown in the figure.

    asked by I have no clue

  73. law

    For an attorney, one of the most common negative aspects of the contingency fee is: (Points: 5) a. that the client may not pay him. b. the high degree of risk involved in the litigation. c. that the costs may be too high. d. that the judge may not grant

    asked by John

  74. physics

    A spring with a force constant of 100 N/m is used to push a 0.27 kg block of wood against a wall. (a) Find the minimum compression of the spring needed to keep the block from falling, given that the coefficient of static friction between the block and the

    asked by I have no clue

  75. law

    The legal business is a __________ industry. (Points: 5) regulatory statutory service judicial is it "Statutory"

    asked by John

  76. mirror images

    Can someone please explain what mirror images to me in simple terms.

    asked by lo

  77. physics

    a projectile is fired from the top of a building with an initial velocity straight upward at 40m/sec. the top of the building is 50 meters above the ground? a) the maximun height of the projectile above the building b) the time for the projectile to reach

    asked by daniel

  78. Chemistry

    Calculate your Kinetic Energy in Joules if you weigh50 kg and you are walking 2 meters/second. This is what I did: KE is Ek=1/2mv^2 So it would be Ek=1/2(50kg) x 2m/s Then I convert kg to pounds. There are .454kg in 1 lb so 50(.454)=22.7lbs

    asked by Anonymous

  79. physics

    a rock is thrown of a cliff with an horizontal velocity of 55.0 m/sec. it takes the rock 7.0 sec to hit the ground a) what is the height of the cliff. b)how far from the foot of the cliff does the rock hit the ground. c) what is the vertical component of

    asked by ru

  80. algebra

    fidn all solutions to x^4 + 3x^2 = 4x^3 + 1

    asked by Nabil

  81. tanks

    the weight of a elliptical tank

    asked by trent

  82. chemistry

    Cumene is a compound containing only C and H that is used in the production of Phenol and acetone in industry. combustion of 47.6 mg cumene produce some CO2 and 42.80 mg water. the molar mass of cumene is between 115-125 g/mol. Determine the empirical and

    asked by NONO

  84. algebra

    invest $2,000, part earns 6% year and reh rest earned 11% year. Interest at end of year = $155. How much is invested at each rate?

    asked by BJ

  85. algebra

    open box made from 33 x 33 inch sheet of metal by cutting out x-inch square from each corner and folding up the sides. What size square should be cut out to produce a box of maximum volume? (This is algebra class)

    asked by Sushmitha

  86. physics

    light travels at a constant speed of 3x10^11 centimeters/sec. how long does it take light to reach the earth a distance of 1.5x10^8 kilometers give your answer in seconds and minutes.

    asked by help

  87. physics

    A pelican flying along a horizontal path drops a fish from a height of 5.5 m. The fi!@#$%^&ravels 7.0 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s^2.

    asked by Chelsea

  88. parphrasing

    can somebody please help me paraphrase this please ?? For any state to make sex a qualification that must ever result in the disfranchisement of one entire half of the people, is to pass a bill of attainder, or, an ex post facto law, and is therefore a

    asked by Anonymous

  89. math

    pls. help.. The functions f and g satisfy f(x) + g(x) = 3x + 5 f(x) �� g(x) = 5x + 7 for all values of x. Determine the value of 2f(2)g(2).

    asked by justme

  90. math

    pls. help... The functions f and g satisfy f(x) + g(x) = 3x + 5 f(x) - g(x) = 5x + 7 for all values of x. Determine the value of 2f(2)g(2).

    asked by justme

  91. math

    Three di erent numbers are chosen at random from the set f1; 2; 3; 4; 5g. The numbers are arranged in increasing order. What is the probability that the resulting sequence is an arithmetic sequence?

    asked by justme

  92. chem

    what happens when a solution of water and t butyl are shaken up with saturated potassium carbonate?

    asked by suel

  93. math

    let w represent the number of words and m represent the number of minutes. Write a rule to show the relationship between w and m. 280 words in 8 mins

    asked by nina

  95. Physical Science

    Why is the viscosity of a liquid important?

    asked by Amy

  96. Physics

    A high diver of mass 69.4 kg jumps off a board 9.6 m above the water. The acceleration of gravity is 9.8 m/s2.If his downward motion is stopped 2.21 s after he enters the water, what average upward force did the water exert on him? Answer in units of N

    asked by Neha

  97. MAT201

    Fluctuation in the prices of precious metals such as gold have been empirically shown to be well approximated by a normal distribution when observed over short interval of time. In May 1995, the daily price of gold (1 troy ounce) was believed to have a

    asked by Lamarr

  98. MATH

    Of 1936 people who came into a blood bank to give blood, 200 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.

    asked by Lamarr

  99. math

    The mass of one electron is 9.11 * 10(negative 28) grams. A uranium atom contains 92 electrons. Find the total mass of the electrons in a uranium atom. Express your answer in scientific notation.

    asked by christy

  100. Science

    In Hadley's cell model warm air rises at the equator and cold air sinks at the poles. Can someone tell me what these 2 questions mean? Surface air flow will be _________. Air flow aloft will be _______. Don't understand those two. Thanks

    asked by Sue

  101. math

    Identify the following amounts. 1. "Decidollar" 2. "Centidollar" 3. "Dekadollar 4. "kilodollar"

    asked by christy

  102. math

    What temperature is numerically the same in degrees Celsius and degrees Fahrenheit?

    asked by christy

  103. chemistry

    the reaction CO + 2H2CH3OH has a delta H -18 kJ. how will the amount of CH3OH be affected by the following. a) removing H2(g) b) decreasing the volume of the container.

    asked by sexy

  104. chemistry

    show how CH4 +O2=CO2+H2O obeys the law of conservation of mass

    asked by denis

  106. algebra

    how to work y= -x-4

    asked by Anonymous

  107. Stats

    Start with x=75 and add four x values to make a smaple of five data such that the standard deviation of these data equals 0.

    asked by Jennifer

  108. chemistry

    How many grams of carbon disulfide,CS2 will form if 0.450 mol of carbon is consumed in a 3C+2SO2=CS2 +2CO2 reaction

    asked by denis

  109. physics

    a sprinter exerts 850N on the starting blocks at 25 degrees to the horizon at the beginning of a race. what is the vertical force exerted at the blocks?

    asked by jenny

  110. Comp 156

    When writing a persuasive essay the ultimate goal is to persuade the reader. List three techniques that you can use in a persuasive essay that will help persuade a reader

    asked by Wonk

  111. Comp 156

    Using the Internet, find two examples of what you consider biased writing about the effect of videogames on children?

    asked by Wonk

  112. statistics

    Starting with a population that is normally distributed with a mean of 100 and a standard deviation of 12, answer the following questions (if possible). a. What is the probability of randomly drawing a single score between 100 and 106, p(100 < X < 106)? b.

    asked by Daniel

  113. math

    To rent a home water softnener, there is an installation fee of $60 plus a $ 25 monthly fee. Write a linear equaion to represent the total cost, y, of renting a water softener for x months. Use th linear equation to compute the cost of renting the water

    asked by Javeria

  114. algebra 2

    decribe the end behavior of the graph of the polynomial function.then evaluate the function for x=-4,-3,-2...,4. equation is y=x^4-2x^2-x-1

    asked by tae

  115. physics

    a sprinter exerts 850N on the starting blocks at 25 degrees to the horizon at the beginning of a race. what is the vertical force exerted at the blocks?

    asked by jenny

  117. Math

    The universal law of gravitation determines the amount of force exerted by a constant mass (M) on another constant mass (m), separated by a distance (r), is given by the expression F = ( -GmM )/r^2 a) What mathematical expression characterises the instant

    asked by Raf

  118. Books

    Is there any books that relate to middle school (for girls).

    asked by Lila

  119. math

    what is 27+49%7=

    asked by Anonymous

  120. Public Administration

    I Have a few questions, but I would first like for me to ask 2 questions. 1. What is organizational behavior and the behavior of people in public organization? 2. What are the techniques in management?

    asked by David S. Mehdeh

  121. Spanish

    Why do people have classes like spanish & french in middle high school ??? I'm curious

    asked by Lila

  122. English

    The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed.

    asked by Aran

  123. physics

    a cannonball is fired horizontally straight up at a modest speed of 9.8. Compute its maximum altitude and the time it takes to reach that height

    asked by Anonymous

  124. physical

    A ball is thrown from the window of a high-rise building with an initial velocity of 7.7 m/s at an angle of 34 deg. below the horizontal. The bill strikes the ground 4.2 seconds after being thrown. Find the height from which the ball was thrown.

    asked by Anonymous

  125. Social Studies 9

    Similarities and Differences Between Puritans and Jacobins; please don't link me a google search, i already searched it up and none of them were what i was looking for. i need 3-4 facts for each section. THANK YOU .

    asked by Stephanie

  126. English

    Identify what is wrong with the following sentence and make any corrections necessary: “I went the campus bookstore and purchased my textbooks, a few folders and a pair of AiPO socks.

    asked by Aran

  128. English

    I still have a doubt. Are the following sentences possible? 1) She accepted to drive me home. 2) Emma blamed me for taking her money. She accused me of taking her money.

    asked by Henry2

  129. economics

    You’re the manager of global opportunities for a U.S. manufacturer, who is considering expanding sales into Europe. Your market research has identified 3 potential market opportunities: England, France, and Germany. If you enter the English market, you

    asked by Anonymous

  130. English

    Identify what is wrong with the following sentence and make any corrections necessary: “I can’t stand drivers that tailgate other cars it is just plain dangerous to do so.

    asked by Aran

  131. calculus

    Consider the function y=x/(x+1) a) Find dy/dx b) Find the equation of the line tangent to the curve at x=-2 c) Find the equation of the line normal to the curve at x=1

    asked by Eric

  132. Fibonacci Numbers

    I posted the question several days ago and Mathmate helped to guide me along. I am just unsure if I do not understand what he is saying or if I did complete the problem right. I would appreciate any input. 1.618034 - -.618034 = 2.236068/sqrt 5 = 1.00000 I

    asked by Rachel

  133. English

    . Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary. a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and

    asked by Aran

  134. Research Methods

    A personal trainer wants a random sample of her clients. She gets the list of all her clients from the gym manager and assigns each one a number. She then uses a table of random numbers to select 50 clients from the list.

    asked by Jill

  135. Research Methods

    A researcher wants to obtain a random sample of the 800 cows from a local farm. He decides to ask the farmer to give him the ear tag numbers of 100 cows he can use in his study. The researcher puts these tag numbers into a hat and randomly chooses 40 to

    asked by Jill

  136. Research Methods

    A researcher wants to attain a random sample of young drivers who have received DUIs within the last year. Using the PREP system, he asks all first year students at WLU who have received a DUI to volunteer for the study. Thirty-five students actually admit

    asked by Jill

  137. Calculus

    Compute lim √(3-s)-√(3+s))/s s→0⁡

    asked by Kat

  139. english

    . Identify which one of the following sentences contains an unnecessary comma. Please correct the error and explain why the correction is necessary. a. I must have been completely absorbed in my work, because I totally forgot about the meeting. b. Because

    asked by Aran

  140. english

    the difference between a dash and a hyphen. Compose sentences of your own to illustrate your points.

    asked by Aran

  141. Trig

    Find the exact value of tan 5pi/12 using the half-angle identity.

    asked by Cynthia

  142. math word problem

    the boiling point of water 212 degree f. this is 180 degree more than its freezing point. define the variable. then write and solve an equation to find the frezzing point of water. show your work. the variable would be: d could be the variable. f + 180 =

    asked by marko

  143. algebra phyics word problem

    at 20 degree C the speed of sound in air is 344 m/s. This is 1.117 m/s slower than the speed of sound in water. write and solve an equation to find the speed of sound in water. i started writeing this but im not sure how to do this: 344 - s = 344 im not

    asked by marko

  144. Science

    Why do lithium and sodium exhibit similar chemical behavior?

    asked by Sheryl

  145. science

    Under what circumstances would you expect the shared electron pair to be equal distances on the average from each of the atoms participating in a covalent bond?

    asked by Sheryl

  146. Health

    Could you help me define these skils: communication, teamwork, technical, safety practices, and health maintenence

    asked by Anonymous

  147. chemistry

    The pH of 6.0 M KOH is 13.78. What is the hydrogen ion concentration of this solution

    asked by Danielle

  148. Chemistry - please help-thanks

    Posted by anne on Saturday, October 15, 2011 at 1:03am. Hi, Please advise on the following: - A procedure for the determination of Impurities A & B in a compound says to use a 4.6 x 150mm x 3um column (stationary phase: octadecylsilyl silica gel). The

    asked by anne

  150. math-a-matic

    okay...is this even possible? because i've tried every way i can think of, and i think this might be impossible to solve? the problem is: find five consecutive odd integers such that the sum of the first and the fith is one less than three times the

    asked by Bina

  151. statistics

    draw a distribution curve that represents the following distribution of scores: results of 6th grade math test given to college students

    asked by Lopez

  152. english

    what is introductory material. Provide an example and then explain what kind of punctuation is needed and why? Introductory material introduces the subject of the sentence. Although he faced 3 years in prison, Bishop told the truth. The sentence needs a

    asked by Aran

  153. math

    Square OPQR has vertices O(0; 0), P(0; 8), Q(8; 8), and R(8; 0). The parabola with equation y = a(x �� 2)(x �� 6) intersects the sides of the square OPQR at points K, L, M, and N. Determine all the values of a for which the area

    asked by justme

  154. chemistry 12

    how would i sketch a pH curve for the titration of40.00mL of 0.100 M hydrazine H2NNH2(aq) having a Kb of 3.0x10^-6 by 0.100M HCIO4(aq) ?

    asked by Mike

  155. websites

    How do upload your own video on prezi. com with audio?

    asked by Anonymous

  156. physical

    height=42m,speed=250m/s, how long will the object remain in air?

    asked by yvonne

  157. Finance

    Can anyone explain to me how to use this formula? Cost of failing to take a cash discount Disc  ount percent 100 percent Discount percent 3   60 Final due date  Discount period I am trying to calculate Assume the proceeds from the loan with the

    asked by Kimmie

  158. English

    Where can I find out the history of the words difficult and challenge and be able to write a paragraph on them each? Tried Google.

    asked by Nicole

  159. statistics

    A study of graduates average grades and degrees showed the following results: B.S. Degrees, 15 graduates averaged Grade A, 8 graduates averaged Grade B, and 5 graduates averaged grade C. Graduates who had a B.A. Degree, 8 averaged grade A, 12 averaged

    asked by Karen

  161. physics

    A small fish is dropped by a pelican that is rising steadily at 0.61 m/s. After 3.2 s, what is the velocity of the fish? The acceleration of gravity is 9.81 m/s2. Answer in units of m/s How far below the pelican is the fish after the 3.2 s?

    asked by anonymous

  162. calculus

    A trough is 12 feet long and 3 feet across at the top. It ends are isosceles triangles with a height of 3 feet. If water is being pumped into the trough at 2.5 cubic feet per minute, how fast is the water level rising when the water is 1 foot deep?

    asked by Kelsey

  163. calculus

    Find all discontinuities of the given function. Also, describe the discontinuities. f(x)= [(x-8)^2(x+3)(2x^2+3x-5)]/[(x+4)^2(2x+5)(x-3)(x^2-1)]

    asked by Ian

  164. calculus

    Given the function: f(x)=x^3-4x^2+6x-3 a) Find the average rate of change of the function on the interval [2,4] b)find the instantaneous rate of change of the function at x=3.

    asked by Lyanne

  165. physics

    A model rocket is launched straight upward with an initial speed of 51.6 m/s. It acceler- ates with a constant upward acceleration of 1.96 m/s2 until its engines stop at an altitude of 230 m. The acceleration of gravity is 9.81m/s^2. When does the rocket

    asked by anonymous

  166. please help

    Im writing a character analysis on the main characters on the movie Heathers but im having a hard time if anyone has seen this movie and understands the characters please help. p.s I went to the websites on google and they havent helped hopefully one of

    asked by rainy

  167. geometry

    show that points A= (10,12,13), B=(13,14,14), and C=(18,18,16) are not collinear

    asked by Karen

  168. English

    Hi I have to write about the following and I have no idea what to write. Please help I am so confused, thanks. Identify two parallels (or thematic echoes) between Synge's Playboy of the Western World and Sophocle's, Oiedipus the King. What is the

    asked by Jon

  169. business

    which part of the comprehensive financial plan do rent and food fall under

    asked by Anonymous

  170. Chemistry

    If 1.000g of (potash) K2CO3 reacts with H2SO4 to produce 145 mL of CO2 gas at STP, what is percentage of Potassium Carbonate in the marble sample?

    asked by Sarah J

  172. algebra

    solve system of equations: y = 2x^3 - 2x^2 y = -6x^2 +30x I know (0,0) is one point. How do I get others?

    asked by Sushmitha

  173. physics

    A small fish is dropped by a pelican that is rising steadily at 0.61 m/s.The acceleration of gravity is 9.81 m/s2. How far below the pelican is the fish after the 3.1 s?

    asked by anonymous

  174. algebra

    Find all positive solutions to: x^6 + 7x = 4x^4 - x^2 + 8

    asked by Nilan

  175. CHEMISTRY

    IDENTIFY THE CONJUGATE ACID-BASE PAIR IN THE FOLLOWING REACTIONS. A) HSO4^- + SO3^2- HSO3^- + SO4^2- B) S^2- + H20 HS^- + OH^- C) CN^- + H3O^+ HCN + H2O D) H2SE + H2O HSE^- + H3O^+

    asked by HELPPPPP

  176. CHEMISTRY

    AT A CERTAIN TEMPERATURE, THE REACTION CO(g) + 2H2(g) CH3OH (g) has Kc = 0.500 CO= 0.180 M H2= 0.220 M WHAT IS THE CONCENTRATION OF CH3OH?

    asked by HELP IM LOST

  177. physics

    A cable is used to raise a 30 urn from an underwater archeological site. There is a 29 drag force from the water as the urn is raised at a constant speed.

    asked by Anonymous

  178. Maths

    Simplify 3x-5(2x-4)

    asked by Malzahar

  179. physics 911

    A force ~F = Fx ˆı+Fy ˆ| acts on a particle that undergoes a displacement of ~s = sx ˆı + sy ˆ| where Fx = 10 N, Fy = −1 N, sx = 5 m, and sy = 3 m. Find the work done by the force on the particle. Answer in units of J b) Find the angle between ~F

    asked by physics

  180. Physics

    The highest barrier that a projectile can clear is 14.5 m, when the projectile is launched at an angle of 31.0 ° above the horizontal. What is the projectile's launch speed?

    asked by Heather

  181. Genetics

    Suppose that a mating between phenotypically normal parents produces two normal daughter and one son affected with hemophilia (x-linked disorder). 1)What is the probability that both of the daughters are heterozygous carriers? so obviously the two parents

    asked by Billy

  183. geography

    which state usually has the coldest year round weather and why: Tennessee, Oregon, Arizona, Georgia? My answer is Oregon. Why? Because it is farther North than Tennessee, Arizona, and Georgia. Am I right?

    asked by Reed

  184. geography

    What is the largest gulf in the world? My findings all point to the Gulf of Mexico as being the world's largest. Am I right? One more quick one. The term geographers use when they refer to the land masses of Europe and Asia as one is Eurasia. Is that

    asked by Reed

  185. college algebra

    how long will it take an investment of $5000 to grow to $8000 if it is invested at 7.8% per year compounded weekly?

    asked by kate

  186. social studies

    whats the holy book of islam

    asked by kobe jenkins

  187. Chemistry

    Hi Please help verify my answer to the following question: 0.500g of pure phosphorous was burned in excess pure oxygen to give a product that has a mass of 1.145 g. What is the empirical formula of the resulting compound? By the use of a mass spectrometer

    asked by Helpme

  188. english

    mrs. sally johnson lives in dallas texass whats the capitalization?

    asked by courtney

  189. calculus

    Find the equation of the line that is tangent to the graph of: x^2cosy +5y^2=(1/4)x^2 , at the point (2π,π)

    asked by Rudy

  190. calculus

    How to solve for "t" - step-by-step sqrt(2t-1) + sqrt(3t+3) = 5 Thank you very much.

    asked by Jonathan

  191. Biology

    What does it mean to say that two genes are "linked"? Can linked genes assort independently? Why or why not?

    asked by Anonymous

  192. algebra

    Considering the following equation: 4y + 7x = -23 I have to solve the equation for y, but I can't use mixed numbers in my answer.

    asked by Anonymous

  194. Chemistry

    you have 505mL of a .125 M HCl solution and you want to dilute it to exactly .100. How much water should you add? I got (.125M)(505mL)=(.100M)(Vf)= 631.25. But on my answer sheet they got 126 mL of H2O???? I don't know how she got it.

    asked by Gracy

  195. math

    What are two equivalent fractions for 3/10 and 7/13 and 15/33?

    asked by Berenice chico

  196. english

    what do you call a person who can not function with out a leader

    asked by kt

  197. Analytical Chemistry

    Need help with question. Calculate the pH of a buffer prepared by adding 100mL of 0.0500M NaOH to 100mL of 0.175M CH3COOH. so far I have calculated mols of CH3COOH---->H+ + CH3OO- CH3COOH=0.1L*0.175mol/1L=0.0175mol OH-=0.1L*0.0500/1L=0.00500mol Not sure

    asked by Caral

  198. algebra

    Make a box with a square base using only 250 square feet of material. what dimensions for the box will produce a maximum valume? what is the maximym volume?

    asked by Nabil
Back to October 2011