Questions Asked on
May 5, 2013

  1. chemistry

    Complete the two reduction half reactions for the cell shown at the right, and show the line notation for the cell by dragging labels to the correct position. (The electrode on the left is the anode, and the one on the right is the cathode.) They give you

    asked by shanonn
  2. geometry

    The longer diagonal of a parallelogram measures 62 cm and makes an angle of 30 degrees with the base. Find the area of the parallelogram if the diagonals intersect at angle of 70 degrees.

    asked by Katreena
  3. statistics

    The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is mound-shaped and symmetric with a mean of 24.6 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested, what is the probability the average

    asked by james
  4. STATSHELP

    A poll was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x-bar= 12.3 books and s=16.6 books. Construct a 95% confidence interval for the mean number of books people read. ____, _____ PLEASE HELP

    asked by Megan
  5. English

    In these four sentences, the word that’s most obviously a loaded word is? 1. Netta and Jim argued over their views of free trade. 2. Netta and Jim had different views on free trade. 3. Netta and Jim were sharply split over the issue of free trade. 4.

    asked by Nikita
  6. 7 STATS MATHGURU PLEASE HELP

    A doctor wants to estimate the HDL cholesterol of all 20-29 year old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 99%confidence assuming s=17.8 based on earlier studies? Suppose the doctor would be content with

    asked by Megan
  7. Statistics

    A researcher wishes to estimate the proportion of adults who have high-spped internet access. What size sample should be obtained if she wishes the estimate to be within .02 with 90% if A) She uses a previous estimate of 0.48? B) She does not use any prior

    asked by Megan
  8. STATISTICS

    Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 15, upper bound is 27. A)The point estimate of the population mean is ________. B) The margin for error for the confidence interval is

    asked by Megan
  9. college Chemistry

    Conductivity test, what controls the brightness of the light? (hint: think about your tapwater abd NaCl results and why they were different)

    asked by judy
  10. Stats help

    A poll conducted in 1972 asked 1003 people, " During the past year, about how many books did you read either all or part of the way through?" Results of the survey indicated that x-bar=18.9 books and s=1 9.9 books. A)Construct a 95% confidence interval for

    asked by Megan
  11. math

    The daily cost C, in RM, of producing a product is C(x)=1000+72x-0.06x^2 (0 more & equal x less & equal 60) where x represents the number of product produced. a) Find the daily cost of producing 50 units b) Find the marginal cost function. c) Find C’(50)

    asked by ifi
  12. chemistry

    A manometer attached to a flask contains NH3 gas have no difference in mercury level initially as shown in diagram. After the sparking into the flask, it have difference of 19 cm in mercury level in two columns. Calculate % dissociation of ammonia. (1) 21%

    asked by Anonymous
  13. Chemistry

    why is it important to know accurately the mass of water used in a calorimeter?

    asked by Kate
  14. Stats help

    A poll conducted in 1972 asked 1003 people, " During the past year, about how many books did you read either all or part of the way through?" Results of the survey indicated that x-bar=18.9 books and s=1 9.9 books. A)Construct a 95% confidence interval for

    asked by Megan
  15. Chemistry 104 PLEASE HELP ME!!

    Determine the weight of Na2C2O4 which is required to react completely with 20.0ml of 0.02M KMnO4.

    asked by Sophie
  16. Chemistry

    one morning you are given 3 test tubes of aqueous solutions of compound X: the "A" tube was set up as unsaturated, while "B" was set up as Saturated in a beaker, then poured of into the tube, and "C" was carefully set up as supersaturated. At lunchtime,

    asked by judy
  17. Finance

    Lin Lowe plans to deposit $1,800 at the end of every 6 months for the next 15 years at 8% interest compounded semiannually. What is the value of Lin's annuity at the end of 15 years? (p. 317)

    asked by D Johnson
  18. Pre calc

    Write the equation in standard ellipse form and graph. 34 x^2 -24xy +41y^2 +41 y^2 -25= 0. i got x= (4 x prime- 3 y prime)/5 and y=(3x prime +4y prime)/5 but cant get the correct math when I plug that into the original equation. Also I need help finding

    asked by Rebekah
  19. Finance

    Nelson Collins decided to retire to Canada in 10 years. What amount should Nelson deposit so that he will be able to withdraw $80,000 at the end of each year for 25 years after he retires? Assume Nelson can invest money at 7% interest compounded annually.

    asked by D Johnson
  20. 7th Grade Math

    What is the measure of an exterior angle of a regular polygon in which the sum of interior angle measures is 5400 degrees? A. 11.25 degrees B. 30 degrees C. 32 degrees D. 168.75 degrees

    asked by Hilda
  21. Math- Statistics

    Suppose 60% of adults have a college degree. If I take a random sample of 80 adults, what is the probability at least 50% of them have a college degree?

    asked by Juliet
  22. Math

    Kathy has ribbons that have lengths of 7 inches, 10 inches, and 12 inches. Explain how she can use these ribbons to measure a length of 15 inches.

    asked by Stone
  23. chemistry

    the fictitious compound pandemonium carbonate has a ksg=3.091*10^-9 M 3 in water at poor temperature .calculate the solubility of PnCo3 in an aqueous solution of 1.11 M pandemonium sulfate. express your answer in units of molarity.

    asked by himani.
  24. Statistics 7

    A doctor wants to estimate the HDL cholesterol of all 20 to 29 year old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 99% confidence assuming s-17.8 based on earlier studies. Suppose the doctor would be content

    asked by Megan
  25. life orientation

    identify three courses or study field/career paths in order of preference and provide two reasons for each choice

    asked by margareth nyaka
  26. COMPUTER DATA NETWORKS

    A firm is assigned the network part 128.171. It selects a 10-bit subnet part. a) Draw the bits for the four octets of the IP address of the first host on the first subnet. (Hint: Use Windows Calculator.) b) Convert this answer into dotted decimal notation.

    asked by Anonymous
  27. english

    At the foot of these fairy mountains the voyager may have descried the light smoke curling up from a village whose shingle roofs gleam among the trees, just where the blue tints of the upland melt away into the fresh green of the nearer landscape. It is a

    asked by mandy
  28. Marketing Math - markup/mark down

    A clothing retailer purchased a line of fall leather coats which were priced to sell at $600 each. This price reflected a markup of 45% on the selling price. At the end of the season the retailer had three coats left, which were marked down 25% and sold.

    asked by anonymous
  29. Finance

    Scupper Molly invested $1,800 semiannually for 23 years at 8% interest compounded semiannually. What is the value of this annuity due? (p. 319)

    asked by D Johnson
  30. physics

    A 1,600 kg car coasts down a hill starting from rest and decreases its height by 22 m over a distance of 90 m of travel. How fast will it be going at the end of the hill, if friction has no effect in slowing its motion?

    asked by Anonymous
  31. computers networking

    A firm is assigned the network part 128.171. It selects a 10-bit subnet part. a) Draw the bits for the four octets of the IP address of the first host on the first subnet. (Hint: Use Windows Calculator.) b) Convert this answer into dotted decimal notation.

    asked by Anonymous
  32. chemistry

    the fictitious compound pandemonium fluoride has a k value in water of 3.091*10^-9 M^3.calculate the solubility of PnF2 in water. Express your answer in units of molarity.

    asked by himani.
  33. chem

    Given an aqueous solution in which the [H+] = 2.5EE-7 M, what is the molar hydroxide ion concentration

    asked by kris
  34. Physics

    A roller-coaster car is moving at 20.0 m/s along a straight horizontal track. What is its speed after climbing a 15.0 m hill?

    asked by Jaime
  35. Chemistry

    Use Hess's Law to find the change in heat of 2C(graphite)+H2(g)-->C2H2(g)? Given: C(graphite) + O2(g) --> CO2(g) change of heat rxn = -393.5 kJ 2H2 (g) + O2(g) ---> 2H2O (l) change of heat rxn = -571.6 kJ 2C2H2 (g) +5O2(g) ----> 4CO2(g) +2H2O (l) change of

    asked by Lauren
  36. PHYSICS

    A pump is required to lift a mass of 850 of water per minute from a well of depth 14.8 and eject it with a speed of 17.7 . Part A How much work is done per minute in lifting the water? Part B How much in giving the water the kinetic energy it has when

    asked by YASER
  37. Finance

    On Abby Ellen's graduation from law school, Abby's uncle, Bull Brady, promised her a gift of $24,000 or $2,400 every quarter for the next 4 years after graduating from law school. If the money could be invested at 6% compounded quarterly, which offer

    asked by D Johnson
  38. physics

    A light spring with a spring constant of 15.2 N/m rests vertically on the bottom of a large beaker of water, as shown in (a) below. A 5.26 10-3 kg block of wood with a density of 636.0 kg/m3 is connected to the spring, and the mass-spring system is allowed

    asked by John Miller
  39. Annuities

    Sanka Blunck wants to receive $8,000 each year for 20 years. How much must Sanka invest today at 4% interest compounded annually? (p. 324)

    asked by D Johnson
  40. Chemistry

    cd2+ (aq) +ni(s)---> cd(s) + ni2+ (aq) what is the half reaction

    asked by Layla
  41. Chemistry

    The density of concentrated sulfuric acid is 1.84 g/mL. If this corresponds to 18 M, what is the molality of the solution? Molar mass= 98. 98 x 18 =1764g/L - 1.84 =1762.16/1000 = 1.76 kg 18/1.76=10.23 m But my only options are: a) 18 m b) 95.5 m c) 240 m

    asked by ramire2
  42. chemistry

    the fictitious compound pandemonium fluoride has a k value in water of 3.091*10^-9 M^3.calculate the solubility of PnF2 in water. Express your answer in units of molarity.

    asked by himani.
  43. calcullus

    Suppose the quantity demanded per week of a certain dress is related to price by the demand equation p=√75-2x. In order to maximize revenue, how many dresses should be made and sold each week?

    asked by greg
  44. math

    1/8 of a small box of detergent cleans 1 load of laundry. How many loads could you wash with 5 boxes of detergent? I need to round numbers but i do not know which ones to round.

    asked by Anonymous
  45. Physics

    A Carnot refrigerator is used in a kitchen in which the temperature is kept at 301 K. This refrigerator uses 216 J of work to remove 2360 J of heat from the food inside. What is the temperature inside the refrigerator?

    asked by Tim
  46. Finance

    Lance Industries borrowed $130,000. The company plans to set up a sinking fund that will repay the loan at the end of 18 years. Assume a 6% interest rate compounded semiannually. What amount must Lance Industries pay into the fund each period? Check your

    asked by D Johnson
  47. Math help please

    1. (9m + 6) + (–5m – 6) 4m + 12 14m + 12 14m – 12 4m 2. (3r^2 + 7r + 1) + (4r^2 – 8r – 2) 7r2 + 15r – 1 7r2 – r – 1 7r2 – 15r – 3 –r2 – r – 1 3. (6h + 1) – (9h + 4) –3h – 3 15h – 5 –3h + 3 –3h + 5 4. (–7w^2 – 2w

    asked by Delilah
  48. Finance

    Twice a year for 15 years, Warren Ford invested $1,700 compounded semiannually at 6% interest. What is the value of this annuity due? (p. 319)

    asked by D Johnson
  49. Intro Chemistry

    Given: C2H2(g) +2HF(g) -> C2H4F2(g) Find: pressure in a 10.0L flask when the reaction is complete When 1.0 mol of C2H2 and 5.0 mol pf HF are reacted in a 10.0 L flask, what will be the pressure in the flask at 0 degrees C when the reaction is complete?

    asked by Laichun
  50. life orientation

    Suggest 5 recommendations on how to address the environmental problems within a community within South Africa

    asked by yolanda munro
  51. Algebra 1

    How many real number solutions exist for 2x^2 + 8x + 8 = 0 The first part is 2x to the power of 2.

    asked by Jos
  52. Finance

    the dividends of the reisner company are expected to grow at an annual rate of 18 percent for the next 5 years, then at a rate of 12 percent each year for the next 4 years, and thereafter grow at a rate of 5 percent each year. if the reisner company's

    asked by Ola
  53. Business Finance

    In 9 years, Rollo Company will have to repay a $100,000 loan. Assume a 6% interest rate compounded quarterly. How much must Rollo Company pay each period to have $100,000 at the end of 9 years?

    asked by D Johnson
  54. Algebra 1

    You can mow your whole lawn in 45 minutes, and your neighbor can mow your whole lawn in 30 minutes. How long would it take you to mow the lawn together? Clearly show and explain each step for full credit. Using rational applications A. Write an equation

    asked by Daniel
  55. statistics

    The attendance at the school play on Friday was 95% of the attendance on Saturday night. If 203 people attended on Saturday night, estimate how many attended on Friday night. a minute agoEdit Question

    asked by Johan
  56. College Chemistry

    What must we know a given ionic salt to be able to predict whether is is a good or poor conductor, w/o testing its conductivity?

    asked by judy
  57. algebra

    If the gross profit rate on the sale of a radio is 28% of the selling price, what is the gross profit rate based on the cost of the radio?

    asked by anonymous
  58. Math

    How long would it take to double your money at 15.86 percent with interest compounded annually?

    asked by Katie
  59. Finance

    Joe Jan wants to receive $22,000 each year for the next 22 years. Assume a 6% interest rate compounded annually. How much must Joe invest today?

    asked by D Johnson
  60. Finance

    Bob Bryan made deposits of $10,000 at the end of each quarter to Lion Bank, which pays 8% interest compounded quarterly. After 9 years, Bob made no more deposits. What will be the account's balance 4 years after the last deposit? (p. 317)

    asked by D Johnson
  61. math

    An 8 in. by 10 in. photo is reduced by dividing the length and width by 2. What is the new perimeter?

    asked by Anonymous
  62. Chemistry

    When 100.0 g of an unknown nonelectrolyte is dissolved in 500.0 g of benzene, C6H6, the solution boils at 82.9°C. Calculate the molecular weight (molar mass) of the unknown material. Kb for benzene is 2.53°C/m and the boiling point of pure benzene is

    asked by ramire2
  63. Maths (Calculus)

    A current i = 50sin 100πt mA flows in an electrical circuit. Determine, using integral calculus, its a) Mean Value b) RMS Value each correct to 2 decimal places over the range t = 0 to t = 10 ms I need to do this two way so I was thinking of using the

    asked by Dylan James
  64. Algebra

    Simplify each of the following expressions into simplest terms. a) {[-X+Y+(-2)*(-2Y)*[X-Y]}/[(X-Y)^2+(X+Y)^2] b) (X^3+4X^2Y+4XY^2+2XY-6Y^2)/(X+2Y)

    asked by Leo
  65. MATH

    A STUDENT COUNCIL COMMITTEE IS MADE UP OF 4 BOYS AND 5 GIRLS.IF 2 COMMITTEE MEMBERS ARE CHOSEN AT RANDOM TO ATTEND A CONFERENCE,WHAT IS THE PROBABILITY THAT BOTH MEMBERS WILL BE BOYS?

    asked by ALEXIS
  66. Physical Science

    A car of mass 900 kg moves at 10 m/s. What is the braking required to stop the car in a time of 5 seconds

    asked by Wanda
  67. Math

    If you are dealt a 5-card hand from a standard deck of 52 playing cards, what is the probability (rounded to 6 decimal places) that you are dealt at least 4 hearts?

    asked by Jenn
  68. Chemistry

    So we're doing oxidation-reduction reactions and batteries and voltages. We did a lab where we would take two metals, put it in a mixture (bleach/water/vinegar/salt) and used a voltmeter to see the DC voltage. Now we're supposed to 'calculate the potential

    asked by Ari
  69. chemistry

    WHEN DOES A CHEMICAL BECOME A DRUG?

    asked by anna
  70. math

    supposed that there are 440 students in class. What is the class rank of the student at the 20th percentile

    asked by Anonymous
  71. Physics

    An ice chest at a beach party contains 12 cans of soda at 2.45 °C. Each can of soda has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg C°). Someone adds a 9.60-kg watermelon at 25.3 °C to the chest. The specific heat capacity of watermelon

    asked by Tim
  72. Calculus

    A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle.

    asked by Megan
  73. Physics

    An X-ray tube used for cancer therapy operates at 33 MV with a beam current of 79 mA striking a metal target. Calculate the power of this beam. Answer in units of W

    asked by Cameron
  74. Writing

    If I use a quote as a title, do I capitalize every first letter in the quote? Example: Should my title be... "The only place success comes before work is in the dictionary" or "The Only Place Success Comes Before Work Is In The Dictionary" please answer

    asked by MathMat
  75. Calculus

    if the surface area of a sphere is given by the formula SA=4pir^2, find the rate of increase of the surface area if the radius is 4 cm and is increasing at the rate of 0.5 cm/min.

    asked by Jason
  76. physics

    A spring loaded gun is used to shoot a 1.3 kg ball from a rooftop. When the gun is fired, a compressed spring will be released shooting the ball into the air. The ball will travel in a parabolic path eventually striking the ground below. The gun is at an

    asked by Anonymous
  77. Analytic Geometry

    What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0 .

    asked by John
  78. life orientation

    1.Identify and describe 3environment health hazards that cause ill health,crises and or disasters within your community or any other community within south africa and globaLly.include evidence that is current of the identifted issues.use

    asked by cathrine
  79. math

    Brian has been making octagonal wooden puzzles. He wants to make some hexagonal puzzles next. By how much does he needs to increase or decrease the angle measure on his template to make the hexagonal puzzles? A. increase by 15 degrees B. decrease by 15

    asked by Cassidy
  80. math

    What is the sum of the exterior angles in a regular 13-gon? A. 152.3 degrees B. 1980 degrees C. 360 degrees D. 3960 degrees

    asked by Cassidy
  81. Physics

    To measure how far below the ocean surface a bird dives to catch a fish, a scientist uses a method originated by Lord Kelvin. He dusts the interiors of plastic tubes with powdered sugar and then seals one end of each tube. He captures the bird at nighttime

    asked by Lily
  82. Math (Algebra)

    The ratio of men to women in the applicants for Lamborghini this year is 4:3, while the ratio of men to women in the successful applicants is 5:3, and the ratio of men to women in the rejected pile is 1:1. If the number of successful applicants is 176,

    asked by Bob
  83. Chemistry

    cd2+ (aq) +ni(s)---> cd(s) + ni2+ (aq) what is the half reaction

    asked by Layla
  84. Chemistry

    What must we know a given ionic salt to be able to predict whether is is a good or poor conductor, w/o testing its conductivity?

    asked by judy
  85. Physics

    Assume that the pressure is one atmosphere and determine the heat in joules required to produce 2.99 kg of water vapor at 100.0 °C, starting with (a)2.99 kg of water at 100.0 °C and (b)2.99 kg of liquid water at 0.0 °C.

    asked by Tim
  86. chemistry

    Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca(OH)¿(aq) + HCl(aq) d CaCl¿(aq) + H¿O(l) CaO(s) + 2HCl(aq) d CaCl¿(aq) + H¿O(l),  DH = -186 kJ CaO(s) + H¿O(l) d Ca(OH)¿(s),  DH = -65.1 kJ

    asked by ciara
  87. Physics

    A lawnmower engine with an efficiency of 0.29 rejects 5500 J of heat every second. What is the magnitude of the work that the engine does in one second?

    asked by Tim
  88. math

    john and james are among 30 students who have applied for a trip to boy's state. two students from the group will be selected at random from the trip. what is the probability that john and james will be the 2 students selected?

    asked by lizette
  89. math 2

    Julie is solving the equation 3x2 + 5x + 15 = 0 and notices that the discriminant b2 - 4ac has a value of -155. This tells her that the equation has

    asked by Anonymous
  90. Math

    How do you find the price of each share if 700 shares of stock are sold for $55.00 ?

    asked by Matthew
  91. Chemistry

    10cm^3 of aa hydrocarbon was completely combusted in 200cm^3 of O2. It was found that there was 20cm^3 of O2 remaining and the volume of CO2 produced was 120cm^3. Determine the formula of the hydrocarbon.

    asked by Nadya
  92. law

    ◦What is traffic calming, and how can it alleviate fear or disorder? Describe how the safe corridor initiative benefited by furthering community-policing goals? Does this affect negative citizen encounters? Why? How can the police turn a negative citizen

    asked by sharday
  93. Physics

    Consider the series RLC circuit in which R2

    asked by rishabh gupta
  94. Math

    ABCDEF is a regular hexagon with side length 4 (Under 4 root)√3. Points G,H,I,J,K,L are chosen uniformly at random, one from each side of the hexagon. What is the expected area of hexagon GHIJKL?

    asked by Mathslover Please help
  95. Physics

    Consider the following standing wave, (all units are SI) z=0.2sin(0.4y)cos(350t) (a) The values of y where the displacement is always zero, are of the form y=a+bn, where n=0,±1,±2,3, etc. What is a? (b) The values of t where the displacement at all

    asked by rishabh gupta
  96. Chemistry

    Given that 1g of Phenacetin requires 82mL of hot water to dissolve, or 1310mL of cold water (TY= 3.92g): 1) How much water will you need to recrystallize the theoretical yield? 2) How much product will be lost because of recrystallization?

    asked by Austin
  97. Chemistry

    Why is this reaction considered exothermic? "Concentrated sulfuric acid dissolves in water and the solution becomes warmer." This is a homework question and when I answered the problem, I thought it was endothermic because the solution is gaining heat, but

    asked by Katie
  98. physical aspects

    A 600 lb. oak packing crate is sitting on a cross grained, 14 ft long, oak ramp. The force of the box against the ramp is 520 lbs, and the downhill force on the box is 300 lbs. Will the box slide down the hill all by itself? Give the box a nudge, will it

    asked by jeff
  99. Statistics

    Maureen is a cocktail hostess in a very exclusive private club. The IRS is auditing her tax return. Maureen claims that her average tip last year was $4.75. To support this claim, she sent the IRS a random sample of 52 credit card receipts showing her bar

    asked by Kay
  100. Chemistry

    cd2+ (aq) +ni(s)---> cd(s) + ni2+ (aq) what is the half reaction

    asked by Layla
  101. Life orientation

    Factors that contribute to HIV&AIDs and discuss how HIV&AIDS impact on the teenager how to overcome this disease

    asked by Katlego
  102. Intro Chemistry

    Given: 2CO(g) + O2(g) -> 2C02(g). When 10 mol of CO and 8.0 mol of O2 react in a closed 10L vessel. a)how many moles of CO, O2, and CO2 are present at the end of the reaction? b)What will be the total pressure in the flask at 0 degrees C?

    asked by Laichun
  103. Algebra

    Prove by mathematical induction that 3^(3n+1) + 2^(n+1) is divisible by 5

    asked by Joe
  104. statistics

    A test has 1 true false question and 2 multiple choice questions(A B C D). Draw a tree diagram and determine the sample space for the possible ways to answer the test.

    asked by janae
  105. math

    If a trees 93 feet tall cast a shade of 26 degrees what is the angel of evaluation of the sum

    asked by Anonymous
  106. French

    What is a French word that fits into this sentence? Tu m'____ I know that the letters go like this: a_t_n_l

    asked by Deidre
  107. Chemistry

    How do you find the equilibrium constant of: B + O2 BO2 ??

    asked by Megan
  108. science

    what happens to the G-force as the speed of the centrifuge increases?

    asked by kate
  109. Physics

    The bar in the figure has constant cross sectional area A. The top half of the bar is made of material "1" with mass density ρ1, and Young’s modulus E1. The bottom half of the bar is made of material "2" with density ρ2 and Young’s modulus E2=2E1.

    asked by HELP NOW
  110. maths-urgently needed

    Rana bought 500 shares of HCL at a rate that yielded him 20 % return on a 24%, Rs 350 share. Later on , the company issued a bonus share for every 10 shares held. When the market price was Rs 480 he sold all the shares and invested the proceeds in buying

    asked by anoynomous
  111. Computer Database SQL

    Update the data in the Employees table so that employees with the following managers are listed as working in the following departments: The UPDATE statement in SQL. I cant figure the statement, I keep getting syntax error. Help. ReportsTo Department

    asked by Hy'Lee
  112. SCIENCE

    EXPLAIN FRICTION AT RIGID SUPPORT OF A PENDULUM SUSPENDED USING A STRING.

    asked by HASNAIN
  113. Chemistry

    10cm^3 of aa hydrocarbon was completely combusted in 200cm^3 of O2. It was found that there was 20cm^3 of O2 remaining and the volume of CO2 produced was 120cm^3. Determine the formula of the hydrocarbon.

    asked by Nadya
  114. Geometry

    ABCDEF is a regular hexagon with side length 43√4. Points G,H,I,J,K,L are chosen uniformly at random, one from each side of the hexagon. What is the expected area of hexagon GHIJKL?

    asked by Sambaran G.
  115. Math

    A 10 km race has 5 water stations set up around the course. What is the minimum number of people that must run in the race in order to guarantee that 10 people stop at the same set of water stations?

    asked by Mathslover Please help
  116. life Orientation

    Teenage pregnancy Critically discus 5 ways in which the human or ennviromental problem impacts on the community.

    asked by sipho
  117. Physics

    A circuit contains a self-inductance L in series with a capacitor C and a resistor R. This circuit is driven by an alternating voltage V=V0sin(ωt). We have L=0.015 H, R= 80 Ω, C= 5e-06 F, and V0=40 volts. Q) Find the energy UC(t) and the energy UL(t)

    asked by rishabh gupta
  118. Math

    The game Upright is played by two players on an m×n square board and has the following rules: At the start of the game, a kangaroo game piece is placed on the bottom left square of the board. Players alternate turns moving the kangaroo, and the first

    asked by Mathslover Please help
  119. Life orientation

    Identify and describe 3 environmental health hazards that causes ill health and or disasters within your community or any community within south africa and globally include evidence that is current of the identified issues

    asked by Ntsoaki
  120. statistics

    A manufacturing company produces 10,000 plastic glasses per week. This company supplies plastic glasses to another company, which packages the glasses as part of picnic sets. The second company randomly samples 10 glasses from the supplier. If at least

    asked by happy
  121. Life Orientation

    In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community. Provide relevant sources to support your claims

    asked by Katlego
  122. Quantitative analysis

    Input Output Model The Xavier Corporation has a digital electronics division and a plastics division. For each dollar's worth of plastics produced, the plastics division uses $.10 worth ofplastic and $.20 worth of electronics. For each dollar's worth of

    asked by Shavon
  123. Biology

    true or false if an organism randomly develops a feature that gives it a survival advantage, then it will be more likely to survive than other organisms, and will also be more likely to produce offspring which also have this advantageous feature.

    asked by Need Help ASAP
  124. chemistry

    The percent water in methyl alcohol can be determined by gas chromatography using a capillary column coated with a non-polar stationary phase and a thermal conductivity detector. A series of calibration standards yielded the following results: Water

    asked by noha
  125. jules high school

    10 ways in which the environmental health hazards can impact negatively on ones health

    asked by theophilus
  126. life orientation

    two institutions organizations that are involved in supporting redress to these disasternd how organization are involved in providing safe nd healthy environment

    asked by mohlago
  127. L.O

    PROVID RECOMMENDATIONS FOR HIV?AIDS

    asked by NELSON
  128. chemistry

    a 35.0ml sample of 37 hcl solution has a density of 1.18g/ml. the sample is diluted to a volume of 0.125L. what is the molarity of the final solution ?

    asked by john
  129. english

    What is the adjective from love?

    asked by Kasie
  130. hw

    a train 100m long is to cross a river bridge of length 800m .what time will it take to cross the bridge ? given that the train moves with a constant velocity of 36 km/h

    asked by Anonymous
  131. All Subjects

    I've got loads of GCSE exams coming up this month and I don't know the best way to revise for them all. Please help!

    asked by Need Help ASAP
  132. physics

    what is velocity of falling salt ball if it had 1 kg mass and placed 5 m high before,now falls after losing 10gm of mass.

    asked by pradev
  133. Advanced Functions/Trig

    Prove the identity: cos^4 x + sin^4 x = 1 - (1/2)sin^2 (2x)

    asked by Zack
  134. Life orientation

    In 10-15 lines critically discuss 5 ways in which the human or enviromental problem impacts on the community. Provide relevant sources to support your claims.

    asked by kayleen
  135. Asympotes, Data?-Bump

    If someone could help me on this, I'd appreciate it. f(x)= 2x/(x^2+1) Vertical: none Horizontal: none Minimum: x=-1 Maximum: x=1 Inflection Points: it seems like there are one or two, but i don't know how to factor f''(x)= 4x^3 + x^2 - 12x + 1 :/

    asked by Alaina
  136. American National government

    According to the trustee model of representation, members of Congress must do what

    asked by Jean
  137. Chemistry

    How do you find the equilibrium constant? ..steps?

    asked by Katie
  138. chemistry

    a 35.0ml sample of 37% hcl solution has a density of 1.18g/ml. the sample is diluted to a volume of 0.125L. what is the molarity of the final solution ?

    asked by john
  139. CHEMISTRY

    WHEN DOES A CHEMICAL BECOME A DRUG?

    asked by PLEASEE HELP MEE
  140. college Chemistry

    What would you expect to be the chemical names of the main gases that were dissolved in the tap water?

    asked by judy
  141. MA 130

    Your salary is to be raised 10% and then a month later reduced by 10%. There it will remain. However, you may elect to have the cut first followed by the raise one month later. Which is the better option?

    asked by Enis
  142. Chemistry

    cr(s)--->Cr^3(aq)+3e- and Pb2+(aq)+2e---->Pb(s) write a balanced equation Please help thanks

    asked by Tommy
  143. Physics

    A man lifts a heavy stone using a bar supported at a stationary point. Which phenomena in daily life in terms of the scientific principles

    asked by GAP
  144. math

    What does 1/10 equal in percent?

    asked by ethan
  145. Life orientation

    I NEED HELP In 10-15 lines critically discuss 5 ways HIV/AIDS problem impacts on the community.

    asked by Blessing
  146. finance

    11-10. A U.S. firm wants to raise $15 million by selling 1 million shares at a net price of $15. We know that some say that firms “leave money on the table” because of the phenomenon of underpricing. a. Using the average amount of underpricing in U.S.

    asked by MK
  147. Algebra

    Factor each of the following expressions completely. (a+b)^2-(2b)^2

    asked by anonymous
  148. economics

    explain the economic logic behind Opec's decision to reduce output

    asked by Remo
  149. VBS 2010

    Write a Web program to calculate the discount rate and interest rate for a bond. If a bond is purchased for n dollars and sold one year later for m dollars, then the discount rate is m-2/m and the interest rate is m-n/n, where each is expressed as a

    asked by David
  150. algebra

    solve for each of the variables. a. 8-(7x+3)/4-2(3-x)=0 c. [3(x+3)]/5+y/2+2z=-1 x/3+[(5y-2)/4]+z=0 x-[2(y+1)/3]-3z=-2 d. 1/(x+3)-2/(x-2)=5/(x+3)

    asked by anonymous
  151. chemistry

    Calculate the partial pressure of helium in a 1.00 L flask that contains equal numbers of moles of He, Ne, and Ar at a total pressure of 8.35 atm.

    asked by Jenny
  152. Pre-Calculus

    My book doesn't explain how to do these problems.. The examples they tell me to refer to have no relevance whatsoever. Any help would be appreciated. Use the power property to rewrite each expression. 17. log_3(x)^2 18. log_2(x)^5 19. log_4(5)^-1 20.

    asked by Caroline
  153. Biology

    An individual with blood type O receives type A blood. The phenomenon is agglutination. Can explain more?

    asked by GAP
  154. Algebra 2 ..........

    When finding an equation of a sine and cosine graph can I use any of the three coordinates (that have the same y value ) to substitute for h and k? Is there a designated one?

    asked by Anonymous
  155. geometry

    The construction of the regular pentagon is equivalent to the construction of the point in the unit circle with x coordinate x1 = the square root of 5 - 1 divided by 4. Use this to construct a regular pentagon that has all its vertices inside the unit

    asked by Jo-Anne
  156. statistics

    No calculation required. what test would be used to predict what the tuition will be in 20 years if it has gone up the past five years?

    asked by red
  157. Chemistry

    cr(s)--->Cr^3(aq)+3e- and Pb2+(aq)+2e---->Pb(s) write a balanced equation Please help thanks

    asked by Katie
  158. math

    I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and

    asked by Hannah
  159. maths

    6log(x^2+1)-x=0

    asked by ELIJAH HAVA
  160. math

    In Ms Smith's class, 20% of the girls wear glasses and 15% of these girls have red hair. If one girl is selected at randon from Ms Smith's class, what is the probability the girl will have red hair and wear glasses?

    asked by wendy
  161. Pre-Calculus

    45. log b sqrt 7x 46. log b sqrt (3/y) Could someone please explain these?

    asked by Caroline
  162. Pre calc

    Write the equation in standard parabola form? x^2+ 4xy +4y^2 +5root5 y+ 5 = 0

    asked by Rebekah
  163. trig

    A slide is attached to the side of a tree house. The height of the tree house is 6 less than double the distance from the baswe of the tree to the base of the slide. The length of the slide is 3 more than the height of the tree house. Find the length of

    asked by Kendra
  164. Biology

    Once blood picked up nutrients from the small intestine, it must pass through the liver via the inferior vena cava. Explain the importance of this pathway.

    asked by SOMEONE HELP THIS PERSON
  165. Life Orientation

    Identify and describe 3 environmental health hazards that cause ill health,crises or disasters within your community

    asked by Anonymous
  166. english

    a dolls house questions: what religious themes do you see in the play? What is the significance of Nora’s words, “to hell and be damned” in Act I? Was Nora wrong to have acquired the money for the trip to save Torvald’s health? What elements of

    asked by allie
  167. math

    If a trees 93 feet tall cast a shade of 26 degrees what is the angel of evaluation of the sum

    asked by Anonymous
  168. life orientation

    in 10-15 lines critically discuss 5 ways in which the human or environmental crime impacts on the community.

    asked by Anonymous
  169. Calculus

    A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle.

    asked by Megan
  170. life orientation

    in 15 lines fires can be critically in which the human or environmental problem impacts on the community.

    asked by Gugu
  171. Physical Science

    if a blue object is placed in front of the screen, what color will it be? explain the answer.

    asked by Wanda
  172. Slavery

    how much were slaves paid after the civil war

    asked by Alex
  173. Relational Database

    Update the data in the Employees table so that employees with the following managers are listed as working in the following departments: The UPDATE statement in SQL. I cant figure the statement, I keep getting syntax error. Help. ReportsTo Department

    asked by Hy'Lee
  174. Calculus I

    find the antiderivative of f(x)=(x^2)/(x^3+5) with explanation

    asked by Jason
  175. Life orientation

    In ten to five lines critically discuss five ways in which the human enviroment problem impacts on the community.provide relevant sources to support your claims

    asked by Nhlakanipho
  176. math

    Will someone please help me with this problem. Simplify the expression, if possible. log 1.

    asked by Sammy
  177. physics

    A barefoot field-goal kicker imparts a speed of 47 m/s to a football initially at rest. If the football has a mass of 0.6 kg and the time of contact with the ball is 0.024 s, what is the magnitude of the force exerted by the ball on the kicker’s foot?

    asked by Anonymous
  178. Statistics

    A random sample of 10 independent observations from a normally distributed population yielded the following values 51, 53, 49, 43, 47, 46, 45, 30, 60, 52. a) Estimate the standard deviation of the sampling distribution of means for samples like this one.

    asked by Deb
  179. Biology

    Once blood picked up nutrients from the small intestine, it must pass through the liver via the inferior vena cava. Explain the importance of this pathway.

    asked by Kim
  180. Mandlenkosi high

    Provide recommodation on how to address the topic that you identified in previous quesion?

    asked by Nomzamo muthwa
  181. LICKING HEIGHTS

    SOLVE THE PROPORTION 12/Y =18/6

    asked by BONNIE HUNT
  182. life orientation

    reccommendation on how to redress hiv and aids

    asked by slindile
  183. life orientation

    .in 10-.15 lines critically discuss 5 ways in which the human or environmental problem impact on the community

    asked by matomed
  184. PHYSICS

    EXPLAIN FRICTION AT RIGID SUPPORT OF A PENDULUM SUSPENDED USING A STRING.

    asked by HASNAIN
  185. SCIENCE

    WHAT CAUSES ATMOSPHERIC PRESSURE?

    asked by HASNAIN
  186. Arts & Humanities 20th century

    Hi, I am having a severe case of writer's block at the moment. My assignment asks me to pick a popular t.v series, movie, or book that I believe suggests a moral choice. Then briefly provide explanation of the section of the story I believe to be the

    asked by Nicole
  187. Biology

    If a normal man marries a normal woman whose father was colourblind, what are the chances that their sons and daughters will be colourblind? Colourblindness is a sex-linked trait that affects males more often than females. With the aid of a Punnett square,

    asked by Su
  188. geometry

    What are degrees of angles for pentagon with 36 sides

    asked by Jeff
  189. college algebra

    i need help with elimination and substitution linear equation

    asked by vivian
  190. maths

    it cost $2592.00 to fence a square field wire cost $18.00 per metre calculate area and side

    asked by Anonymous
  191. history

    explain five function of cairo

    asked by anna xylmar
  192. Geometry

    Two points are chosen uniformly at random on the unit circle and joined to make a chord C1. This process is repeated 17 more times to get chords C2,C3,…,C18. What is the expected number of pairs of chords that intersect?

    asked by Sambaran G.
  193. Math

    How many of the first 1001 Fibonacci numbers are divisible by 3?

    asked by Mathslover Please help
  194. maths

    1/5 of a circle in a circle is labelled a degrees there is another angle measured a b degrees calculate b value

    asked by Anonymous
  195. Math

    Let AB be the diameter of circle Γ1. In the interior of Γ1, there are circles Γ2 and Γ3 that are tangent to Γ1 at A and B, respectively. Γ2 and Γ3 are also externally tangent at C. This exterior tangent cuts Γ1 at P and Q, with PQ=20. The area that

    asked by Mathslover Please help
  196. physics

    an object is thrown upward with an initial velocity 'u' m/s. derive an expression for the height 'h' at which its kinetic energy becomes equal to its potential energy.

    asked by Annointed Jesu
  197. chemistry

    When does a chemical become a drug?

    asked by please help me
  198. mayh

    Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens

    asked by Mathslover Please help
  199. math

    Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens

    asked by Mathslover Please help
  200. Math

    ABCDEF is a regular hexagon with side length 4 (Under 4 root)√3. Points G,H,I,J,K,L are chosen uniformly at random, one from each side of the hexagon. What is the expected area of hexagon GHIJKL?

    asked by Mathslover Please help
  201. Physics

    a horizontal force Pushes a 80 N box up a frictionless 37 degree incline at a constant velocity as shown.? What is the magnitude of P in newtons?

    asked by Naveed Khan
  202. life orientation

    providerecommendations on how to address the topic that you identified in the previous question.

    asked by cynthia
  203. Math

    Two points are chosen uniformly at random on the unit circle and joined to make a chord C1. This process is repeated 17 more times to get chords C2,C3,…,C18. What is the expected number of pairs of chords that intersect?

    asked by Mathslover Please help
  204. Math

    A,B,C,D,E,F are 6 consecutive points on the circumference of a circle such that AB=BC=CD=10,DE=EF=FA=22. If the radius of the circle is √n, what is the value of n?

    asked by Mathslover Please help
  205. Chemistry PLEASE HELP!

    Check all of the following statements which are TRUE for a titration. Select one or more: a. A suitable primary standard must be available. b. The concentration of the solution in the buret (the titrant) must be known before the titration is begun. c.

    asked by Sophie
  206. Math

    θ is an angle such that 180∘

    asked by Mathslover Please help
  207. Math

    Find the smallest positive integer n such that the equation 455x+1547y=50,000+n has a solution (x,y) where both x and y are integers

    asked by Mathslover Please help
  208. Creative writing

    This is a question I should know the answer to, but for some reason, I don't. People in my class write their dialogues like this: ["Carrie," I said, "What was my sister's name?"] Is that comma after 'said' supposed to be there, or should it be a period?

    asked by Millie
  209. Math

    N is an integer such that N≡179(mod233) and N≡233(mod179). Determine a three digit positive integer M such that N≡M(mod179×233). Details and assumptions You may use the fact that 179 and 233 are primes.

    asked by Mathslover Please help
  210. Math (Algebra)

    Find the sum of squares of all real roots of the polynomial f(x)=x^5−7x^3+2x^2−30x+6.

    asked by Mathslover Please help
  211. Quantitative analysis

    Matrix Algebra Assignment Let A= 4 −1 6 9 and B= 0 3 3 −2 Find: 1. A + B 2. AB 3. BA 4. A' (the transpose of A). 5. What is an Identity Matrix?

    asked by Shavon
  212. L.O

    Identify one environmental or human factor that causes ill health, accidents or disasters within a community in South Africa

    asked by yatho
  213. PHARMACYINFORMATICS

    WHEN DOES A CHEMICAL BECOME A DRUG?

    asked by PLEASSSEEE HELP MEE
  214. economics

    Explain the economic logic behind opec decision to reduce output?

    asked by ezekiel
  215. MATH

    IN A PHYSICS EXPERIMENT,THE DISTANCE OF X AND Y CM HAS A CONNECTION TO EACH OTHER BY 1/X + 1/Y = 1/5.IF THE DISTANCE OF Y IS INCREASING AT THE RATE 16 CMS^(-1),FIND THE RATE OF CHANGE OF THE DISTANCE OF X WHEN Y=9 CM.

    asked by SYAZ
  216. L.O

    Name two community organizations that are involved in supporting or giving redress to water pollution

    asked by Lakhe Smith
  217. Math (Algebra)

    The sum of beads owned by John, Bob, and Dale is 273. The ratio of John's beads and Dale's is 8:5, and Dale's beads are 10/13 times Bob's. How many more beads does John own than Dale?

    asked by Bob
  218. chemistry

    We have a tank that contains O2 at 146 mmHg, N2 at 146 mmHg, and CO2 at 138 mmHg. We then add 135 mmHg of Ar. What is the pressure in the tank?

    asked by Jenny
  219. english

    Could somebody check this for me please? My name is Damian Donarski I'm ten years old. I live in Bournemouth now,but I was born In Poland. I live here with my family, which has three members my parents and me. I like playing football with my friends. My

    asked by kina
  220. life orientation

    A brief discription of a stroke disease

    asked by yolanda
  221. Algebra

    y = ax, has asymptote ________ and y-intercept ________.

    asked by Connor
  222. business math

    One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to $600,000, what are the total sales of the company? (P

    asked by kendrick
  223. Physics

    The bar in the figure has constant cross sectional area A. The top half of the bar is made of material "1" with mass density ρ1, and Young’s modulus E1. The bottom half of the bar is made of material "2" with density ρ2 and Young’s modulus E2=2E1.

    asked by AK
  224. Accounting

    A truck was purchased for $25,000. It has a six-year life and a $4,000 salvage value. Using straight-line depreciation, what is the asset’s carrying value (book value) after 2 years?

    asked by Harriett
  225. Chem

    cr(s)--->Cr^3(aq)+3e- and Pb2+(aq)+2e---->Pb(s) write a balanced equation Please help thanks

    asked by Jess
  226. life orientation

    provide recommendation on how to address the topic hiv/aids

    asked by mohlago