Questions Asked in August 2012

Most Popular Questions of August 2012

  1. English

    Write a debate on the topic;Boys should not help in the kitchen.Speak for or against the motion.

    asked by Vanessa on August 14, 2012
  2. Physics

    While working on her bike, Amanita turns it upside down and gives the front wheel a counterclockwise spin. It spins at approximately constant speed for a few seconds. During this portion of the motion, she records the x and y positions and velocities, as

    asked by Sam on August 19, 2012
  3. Science(Chemistry)

    HCL+Al=AlCl3+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?

    asked by Timothy on August 18, 2012
  4. Math

    The grocery store sells kumquats for $4.25 a pound and Asian pears for $2.25 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with $18.

    asked by Tony on August 3, 2012
  5. calculus

    The point P(4, −2)lies on the curve y = 2/(3 − x). (a) If Q is the point(x, 2/(3 − x)),use your calculator to find the slope mPQ of the secant line PQ (correct to six decimal places) for the following values of x. 1) 3.9 mPQ= 2) 3.99 mPQ= 3)3.999

    asked by student on August 28, 2012
  6. science

    A chair of mass 15.5 is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force = 38.0 that is directed at an angle of 42.0 below the horizontal and the chair slides along the floor.Use Newton's laws to calculate

    asked by John on August 3, 2012
  7. prealgebra

    At the same time that a 60-foot tall building casts a shadow that is 21.5 feet long, a nearby tree casts a shadow that is 18 feet long. Which measure is closest to the height of the tree?

    asked by Mary on August 15, 2012
  8. physics 102

    The output voltage of an AC generator is given by Δv = (180 V) sin (70πt). The generator is connected across a 13.0-Ω resistor. (a) By inspection, what is the maximum voltage? V (b) By inspection, what is the frequency? Hz (c) Find the rms voltage

    asked by Matt Will on August 9, 2012
  9. physics

    a particle is dropped under gravity from rest from a height and it travels a distane of 9h/25 in the last second. Calculate the height h?

    asked by Aditya on August 20, 2012
  10. math

    How many arrangements can be made using 4 letters of the word HYPERBOLAS if no letter is to be used more than once?

    asked by cha-cha on August 2, 2012
  11. physics

    an ideal spring of negligible mass is 12.00 cm long when noting is attached to it. When you hang a 3.15kg weight from it, you measures its length to be 13.40 cm. if you wanted to store 10.0 J of potential energy in this spring, what would be its total

    asked by zianna on August 22, 2012
  12. math 213

    The amount of money in cents in a jar containing some nickels and d dimes and some quarters if there are 4 times as many nickels as dimes and twice as many quarters as nickels

    asked by susan on August 18, 2012

    Two bulbs are connected in parallel across a source of emf EMF = 10.0V with a negligible internal resistance. One bulb has a resistance of 3.0 Omega , and the other is 2.5 Omega . A resistor R is connected in the circuit in series with the two bulbs. What

    asked by sarah on August 23, 2012
  14. math

    What's the quickest way for an ant to go from the ground to the tree trunk?

    asked by ben on August 22, 2012
  15. English

    “The Marginal World” by Rachel Carson Selection Test A Critical Reading Identify the letter of the choice that best answers the question. 1. What is Carson’s main reason for writing about nature in “The Marginal World”? A. to share the meaning

    asked by lenecia on August 13, 2012
  16. biology

    1.What is the % concentration of oil in the first, second, and third trophic levels in our food chain? 2.How did the concentration of oil change from one trophic level to the next? 3.How does the change in concentration represent biomagnification? 4.How

    asked by kiesha on August 9, 2012
  17. Physics

    A police car traveling at 94.5 km/h is traveling west, chasing a motorist traveling at 77.2 km/h. (a) What is the velocity of the motorist relative to the police car? The magnitude and its direction (b) What is the velocity of the police car relative to

    asked by John on August 1, 2012
  18. chemistry

    Two liquids of different densities (ρ1 = 1500 kg/m3, ρ2 = 500 kg/m3) are poured together into a 100 L tank, filling it. If the resulting density of the mixture is 800 kg/m3, find the respective masses of the liquids used.

    asked by nick on August 29, 2012
  19. Physic

    You walk 55 m to the north, then turn 60° to your right and walk another 46 m. How far are you from where you originally started? Can someone help me with this question please? I have tried Pythagorean but it did not work. thank

    asked by John Yi on August 28, 2012
  20. chemistry

    A chemist must dilute 55.6 ml of 1.48 M aqueous silver nitrate (AgNO3) solution until the concentration falls to 1.00M. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in

    asked by Lizzy on August 31, 2012
  21. business finance

    Jeff Jones earns $1,200 per week. He is married and claims four withholding allowances. The FICA rate is as follows: Social Security rate is 6.2% on $97,500; Medicare rate is 1.45%. To date his cumulative wages are $6,000. Each paycheck, his employer also

    asked by no name on August 31, 2012
  22. chemistry

    A volume of 100mL of 1.00 M HCl solution is titrated with 1.00 M NaOH solution. You added the following quantities of 1.00 M NaOH to the reaction flask. Classify the following conditions based on whether they are before the equivalence point, at the

    asked by Anon on August 6, 2012
  23. physics

    A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?

    asked by Ben on August 13, 2012
  24. English

    In the following sentence, identify the part of speech of the italicized word. Thousands of years ago, fish were caught in nets and traps. A. Verb B. Preposition C. Pronoun D. Conjunction Is it B?

    asked by Sara on August 16, 2012
  25. Chemistry

    Balance the equation and then write the net ionic equation a. (NH4)2 CO3(aq) + Cu(NO3)2(aq) to CuCO3(s) + NH4NO3(aq)

    asked by PJcotieboi on August 20, 2012
  26. math

    Your iron works has been contracted to design and build a 500-ft3 square-based, open-top, rectangular steel holding tank for a paper company. The tank is to be made by welding half-inch-thick stainless steel plates together along their edges. As the

    asked by ibranian on August 7, 2012
  27. chemistry

    How many moles of HNO3 are present if 0.236mol of Ba(OH)2 was needed to neutralize the acid solution?

    asked by Anon on August 6, 2012
  28. Advanced Surveying

    Explain the types of Signals & Towers used in triangulation.

    asked by rakesh on August 7, 2012
  29. MATH

    You wish to mentally estimate the total cost of items that have the following prices: $1.85, $.98, $3.49, $9.78, and $6.18. Rounding off the items to the nearest half-dollar, your estimate of the total cost of these items is A. $22.50. B. $22.30. C.

    asked by Sara on August 18, 2012
  30. algebra

    ABC and DCB are right angles .That A and D respectively.And AC=DB. Prove that angle ABC is equal to angle DCB?

    asked by TUHITUHI on August 15, 2012
  31. chemistry

    How many moles of chloride ions are present in 18.4g of CaCl2? I don't know how to set this up...

    asked by lola on August 4, 2012
  32. geometry

    Campsite F And G Are On Opposite Sides Of The Lake.A Survey Crew Made Measurements Shown On The Diagram .What Is The Distance Between The Two Campsites?

    asked by emma on August 17, 2012
  33. Literature- Urgent!!

    Can anyone help me find a hyperbole in the book the lord of the flies, please? I've been trying to find one for the past two months! And now, school is about to start. The quotation, page number and a brief summary would be appreciated!!

    asked by IB student on August 10, 2012
  34. physics

    A small mailbag is released from a helicopter that is descending steadily at 1.01 m/s. (a) After 4.00 s, what is the speed of the mailbag? v = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the

    asked by roger on August 30, 2012
  35. Chemistry 2

    Supposed you stoppered the flasks after your titration to determine the equilibrium constant and kept the solutions for another day so that the equilibrium was re-established. What would happen to the amount of ethanol present? What would be the

    asked by Robert on August 3, 2012
  36. Physics

    A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 0.8 m/s2 for 4.4 seconds. It then continues at a constant speed for 13.5 seconds, before getting tired and slowing

    asked by David on August 27, 2012
  37. precalc

    use power reducing identities to prove the identity sin^4x=1/8(3-4cos2x+cos4x) cos^3x=(1/2cosx) (1+cos2x) thanks :)

    asked by skye on August 16, 2012
  38. physics

    A plane traveling at 80 m/s lands on a runway and comes to rest after 10 seconds. What was the plane's deceleration

    asked by d mac on August 31, 2012
  39. Physics - Electromagnetism

    A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant when the angle between the field and the normal to the plane of the loop is equal to 20 and increasing at the rate of

    asked by Robert on August 12, 2012

    Consider the reduction of 4-t-butylcyclohexanone. If the procedure calls for 153 mg of 4-t-butylcyclohexanone, what mass of sodium borohydride should be added?

    asked by Hannah on August 19, 2012
  41. Algebra

    Please let me know if i answered these correctly thanks 1.Which property of the real numbers is illustrated by the following statement? 4(3x) = (4 ∙ 3)x answer: distributive property 2. Which property of the real numbers is illustrated by the following

    asked by Ron on August 3, 2012
  42. maths

    prove that tan(45+theta)+tan(45-theta)=2sec2theta

    asked by tina on August 10, 2012
  43. statistics/ Help!-thanks!

    The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people use the new toothpaste for 6 months. The mean number of cavities at their next check up is 1.5. In the general population

    asked by StudentD on August 25, 2012
  44. Physics

    Assume that 0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20° C. The gas then undergoes isobaric heating to a temperature of 300° C. What is the final pressure of the gas? What is the final volume?

    asked by VW on August 4, 2012
  45. physics

    A locomotive is pulling 17 freight cars, each of which is loaded with the same amount of weight. The mass of each freight car (with its load) is 37,000 kg. If the train is accelerating at 0.7 m/s2 on a level track, what is the tension in the coupling

    asked by badz on August 4, 2012
  46. chemistry

    Determine the electron geometry, molecular geometry, and idealized bond angles for each of the following molecules. In which cases do you expect deviations from the idealized bond angle?1.pf3 2.sbr2 3.ch3br 4.bcl3

    asked by ana on August 23, 2012
  47. Statistiscs

    Students in the psychology department consume an average of 5 cups of coffee per day with a standard deviation of 1.75 cups. The number of cups of coffee consumed is normally distributed. • What proportion of students consume an amount equal to or less

    asked by StudentD on August 28, 2012
  48. math

    In the following, write an expression in terms of the given variables that represents the indicated quantity: a. The cost of having a plumber spend h hr at your house if the plumber charges $30 for coming to the house and $x per hour for labor b. The

    asked by mary on August 18, 2012
  49. physics

    An object moves with constant acceleration 3.65 m/s2 and over a time interval reaches a final velocity of 10.4 m/s. (a) If its initial velocity is 5.2 m/s, what is its displacement during the time interval? m (b) What is the distance it travels during this

    asked by roger on August 30, 2012
  50. Science

    A car starts from rest and moves with constant acceleration during the 5th second of its motion,it covers a distance of 36 meters. what is the acceleration

    asked by Mariam on August 31, 2012
  51. Chem

    Consider the reduction of 4-t-butylcyclohexanone. If the procedure calls for 153 mg of 4-t-butylcyclohexanone, what mass of sodium borohydride should be added?

    asked by Hannah on August 18, 2012
  52. chemistry

    How do you make a venn diagram of the 6 branches of chemistry? (Inorganic chemistry, organic chemistry, biochemistry, nuclear chemistry, physical chemistry, and analytical chemistry) like where would they go in the 3 circles

    asked by jake on August 26, 2012
  53. math

    Your company can make x-hundred grade A tires and y-hundred grade B tires a day, where 0≤x≤4 and y= (40-10x)/(5-x). The profit on each grade A tire is twice the profit on each grade B tire. Assuming all tires sell, what are the most profitable numbers

    asked by ibranian on August 7, 2012
  54. algebra 2

    what is the answer for "what might you have if you don't feel well ?

    asked by jocelynn on August 29, 2012
  55. physics

    a wire under tension vibrates with a fundamental frequency of 256Hz. what would be the fundamental frequency if the wire were half as long, twice as thick, and under 1/4 tension?

    asked by Anonymous on August 16, 2012
  56. Chemistry

    What will happen when 100 ml of diethyl ether are added to 100 ml of water and thoroughly mixed? a.) Water will form a separate layer on top of the ether layer. b.)The temperature of the mixture will significantly increase. c.)There will be a chemical

    asked by Anna on August 12, 2012
  57. Physics

    A. A baseball is seen to pass upward by a window 28.1 m above the street with a vertical speed of 13.7 m/s. If the ball was thrown from the street, what was its initial speed? B. What altitude does it reach? C. How long before the ball passed the window

    asked by Ashley on August 21, 2012
  58. Math

    Find the 95% confidence interval for the standard deviation of the lengths of pipes if a sample of 26 pipes has a standard deviation of 10 inches

    asked by Anonymous on August 3, 2012
  59. chemistry

    Find the number of disintegrations per minute emitted by 1.1 mol of 232-Th in 1 min. The half-life of 232-Th is 1.4 x 1010 year I was able to do this with the following technique: 1.1 x 6.022 x10^23 =6.62x10^23 1.4x10^10=7.358x10^15 minutes I think then it

    asked by Nancy on August 2, 2012
  60. Pre-Calculus

    Find the maximum and minimum values of the function for the polygonal convex set determined by the given system of inequalities. x + y > 2 8x – 2y < 16 4y < 6x + 8 f(x, y) = 4x + 7y

    asked by Zakiyyah on August 29, 2012
  61. english

    The textbook stresses that your writing Fill in the Blank 01; that is, you must have "a goal of demonstrating the truth of your conclusions and clarifying and illuminating your idea about the topic and also about the work."

    asked by Anonymous on August 30, 2012
  62. french

    I want to learn french how can I start please advise me thank you

    asked by Anonymous on August 24, 2012
  63. Chemistry

    38.0kg mass of copper is melted to be cast into a graphite mold at a copper pipe foundtry. If the solid copper starts off at the normal melting temperature of copper and the liquid copper is put into the mold at the crystallization point of copper, how

    asked by Jacob on August 15, 2012
  64. math

    An 8 ft wall stands 27 ft from a building. Find the length of the shortest straight beam that will reach to the side of the building from the ground outside the wall.

    asked by rolan on August 10, 2012
  65. Calculus

    The percentage of the moon's surface that is visible to a person standing on the Earth varies with the time since the moon was full. The moon passes through a full cycle in 28 days, from full moon to full moon. The maximum percentage of the moon's surface

    asked by Jillian on August 23, 2012
  66. Chemistry

    Suppose you have a strong peak at 2230 cm–1. What is the wavelength of the radiation that was absorbed?

    asked by Jen on August 25, 2012
  67. College Algebra

    The area of a rectangular wall of a barn is 24 square feet. Its length is 8 feet longer than twice its width. Find the length and width of the wall of the barn

    asked by Lucy on August 15, 2012
  68. math

    Assume that a dart is randomly thrown at the dartboard shown here and strikes the board every time. The payoffs are listed on the board. How much should you be willing to pay for the opportunity to play this game? (Give your answer to the nearest cent.)

    asked by Anonymous on August 30, 2012
  69. math

    How many edges are in K15, the complete graph with 15 vertices. Any help would be appreciated, thanks.

    asked by Meredith on August 25, 2012
  70. chemistry

    The reaction of 9.3 grams of fluorine with excess chlorine produced 4.1 grams of ClF3. What percent yield of ClF3 was obtained?

    asked by Nick on August 30, 2012
  71. physics

    A passenger on an interplanetary express bus traveling at = 0.95 takes a 9.0-minute catnap, according to her watch.How long does her catnap from the vantage point of a fixed planet last?

    asked by julie on August 10, 2012
  72. physics

    Starting from rest, a boat increases its speed to 4.92 m/s with constant acceleration. (a) What is the boat's average speed? (b) If it takes the boat 5.07 s to reach this speed, how far has it traveled?

    asked by stoic-rider77 on August 29, 2012
  73. math

    The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria triples every 30 sec. (Hint: The answer should contain q as well as n.)

    asked by mary on August 18, 2012
  74. art history

    Imagine that you are a prehistoric artist and write a 350 to 500 word story explaining why you are an artist and what the purpose of your art is. Be clear about what time period and location you are from. You may do research about prehistoric art, but be

    asked by Help!! on August 14, 2012
  75. Chemistry IR Spectroscopy

    Sort the compounds: conjugated or non conjugated. -but-2-enoic acid -butanoic acid -hex-4-en-3-one -hexan-3-one

    asked by Jen on August 25, 2012
  76. Physics

    In the school cafeteria, a trouble-making child blows a 12.0 g spitball through a 25.0 cm straw. The force of her breath as a function of the distance along the length of the straw can be modeled as 10-50x^2-70x^3 where force is in newtons and x is in

    asked by Chad on August 8, 2012
  77. physics

    A 10kg runaway grocery cart runs into a spring with spring constant 260 n/m and compresses it by 50 cm . Part A What was the speed of the cart just before it hit the spring?

    asked by shari on August 7, 2012
  78. math

    1. Find the LCD of 3/5 and 1/6. a. 5 b. 6 c. 11 d. 30 2 Add the fractions and write your answer in lowest terms. 2/5 + 1/9 a. 1/15 b. 23/45 c. 3/14 d. 19/45 3. Subtract the fractions and write your answer in lowest terms. 4/5 - 3/8 a. 1/40 b. 1 7/40 c.

    asked by Nyla on August 29, 2012
  79. Statistics

    A random sample of forty-eight 200 meter swims has a mean of 3:12 minutes and a standard deviation of .09 minute. Construct a 95% confidence interval for the population mean time. I know u: 3.12, sx: .09, n:48, c:.95 What is the formula I use to find the

    asked by Brian on August 1, 2012
  80. math

    Leslie has been offered the choice of either a $1,000 rebate or a 5.5 percent, 48-month loan for the new car she is purchasing. If Leslie will be financing $15,000 and she can get a 7.5 percent, 48-month loan at her credit union, should she take the $1,000

    asked by Steven on August 5, 2012
  81. Math

    Joelle earns her regular pay of 7.50 per hour for up to 40 hours a week. for each hour over 40 hours of work in a week, joelle is paid 1.5 times her regular pay. how much does joelle earn for a week in which she works 42 hours?

    asked by David on August 14, 2012
  82. writing skills

    7. The best way to ensure parallel construction in your essay is to use similar A. paragraph lengths. [B. sentence structure throughout.] C. topic headings in your outline. D. details in each paragraph.

    asked by jake on August 23, 2012

    The standard molar entropy of lead(II) bromide (PbBr2) is 161 J/mol • K. What is the entropy of 2.45 g of PbBr2? a. +1.07 J/K d. –161 J/K b. –1.07 J/K e. 0 J/K c. +161 J/K

    asked by MONICA on August 1, 2012
  84. chemistry

    treatment of a 0.400g sample of impure potassium chloride with an excess of AgNO3 resulted in the formation of 0.733g of AgCl. calculate the percentage of KCl in the sample. show balanced equations in support of your answer

    asked by Andrea on August 15, 2012
  85. sig figs

    I am having trouble with my sig figs Many scientific data are reported at 25°C. What is this temperature in kelvins and in degrees Fahrenheit? I got 3.0e2 degrees kelvin since it will have to have two sig figs but it said it was wrong

    asked by Hannah on August 15, 2012
  86. math

    The stiffness S of a rectangular beam is proportional to its width (w) times the cube of its depth/height (h). find the dimensions (i.e.: w and h) of stiffest beam that can be cut from a log which has a circular cross-section with diameter of 12-in.

    asked by deel on August 9, 2012
  87. Calculus

    (a) By graphing the function f(x) = (cos 2x − cos x)/x2 and zooming in toward the point where the graph crosses the y-axis, estimate the value of lim x → 0 f(x). (b) Check your answer in part (a) by evaluating f(x) for values of x that approach 0.

    asked by Anonymous on August 30, 2012
  88. Algebra

    Find k, given that (2,k) is equidistant from (3,7) and (9,1). The answer is : k=0 How do I solve this problem?

    asked by Alex on August 13, 2012
  89. physics

    A 1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30 ° below thehorizontal just before it strikes a horizontal surface. The ball leaves this surface 0.50 slater with a velocity of 2.0 m/s directed 60 ° above the horizontal. What is

    asked by Ben on August 12, 2012
  90. college chemistry

    Rank from highest to lowest vapor pressure.CH3CH2CH2CH2OH,CH4,CH3CHCH2CH3CH3,CH3CH2CH2CH2CH3

    asked by deb on August 31, 2012
  91. physics

    Find the Magnitude of the force exerted by each cable to support the 625 N punching bag. One cable is connected to the ceiling with an angle of 37 degrees and the other cable is connected perpendicular to the side wall (Horizontal). HELPP

    asked by kacey on August 9, 2012
  92. statistic

    A researcher conducts an experiment comparing three treatment conditions with a separate sample n = 8 in each treatment. An analysis of variance is used to evaluate the data, and the results of the ANOVA are presented in the table below. Complete all

    asked by jay on August 28, 2012
  93. chemistry

    A solution of sodium cyanide NACN has a PH of 12.10. How many grams of NACN are in 425ml of solution with the same PH? Please helps me to solve it for me

    asked by Fai on August 5, 2012
  94. physics

    Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. The initial speeds are such that both arrows reach their maximum heights at the same instant, although these heights are

    asked by Anonymous on August 26, 2012
  95. american history

    Which of the following statements is true of the Gulf of Tonkin affair? A. Congress was divided and only reluctantly passed the Gulf of Tonkin Resolution. B. The destroyer Maddox was sunk by North Vietnamese gunboats. C. Johnson approved covert amphibious

    asked by hilorie on August 26, 2012
  96. Chemistry

    500ml of 0.250M Na2SO4 solution is added to an aqueous solution of 15.00 g of BaCl2 resulting in the formation of white precipitate of BaSO4. How many moles and how many grams of BaSO4 are formed?

    asked by Natasha on August 9, 2012
  97. Chem

    What is the PH of 0.40 M Na2SO3? (K1 for H2SO3 = 1.5 * 10^-2; K2 = 1.0 * 10^-7

    asked by XIA on August 2, 2012
  98. math

    A spherical baloon expands when it is taken from the cold outdors to the inside of a warm house. if its suface area increases 16%, by what percentage does the radius change

    asked by tasha on August 24, 2012
  99. math

    A silo is to be made in the form of a cylinder surmounted by a hemisphere. The cost of construction per square foot of surface area is twice as great for the hemisphere as for the cylinder. Determine the dimensions to be use (in terms of V) if the volume

    asked by ibranian on August 7, 2012
  100. Chemistry

    Assume the solubility of benzoic acid in ice-cold water is 1.70 g/L and the solubility of benzoic acid in hot water is 68.0 g/L. Calculate the minimum volume of water (in mL) needed to recrystallize 0.950 g of benzoic acid.

    asked by Jen on August 12, 2012