Popular questions and responses by MIKE
  1. Chem

    Consider the balanced chemical equation: 3Sr(OH)2(aq) + 2H3PO4(aq) → Sr3(PO4)2(s) + 6H2O(l). How many moles of Sr(OH)2 remain if 0.10 mol of H3PO4 react with 0.40 mol of Sr(OH)2?

    asked on August 20, 2011
  2. Chemistry Help

    The ΔHvap of a certain compound is 34.68 kJ·mol–1 and its ΔSvap is 93.60 J·mol–1·K–1. What it the boiling point of this compound?

    asked on February 10, 2013
  3. Calculus - Need help please

    Given the following​ function, y=tan(pi-3x) 1)determine the interval for the principal cycle. (^ Type your answer in interval notation) 2)Then for the principal​ cycle, determine the equations of the vertical​ asymptotes 3)find the coordinates of the

    asked on August 4, 2016
  4. chemistry

    For a particular isomer of C8H18, the following reaction produces 5113.3 kJ of heat per mole of C8H18(g) consumed, under standard conditions. C8H18(g) + 25/2(O2)(g) -> 8CO2(g) + 9H2O(g) DeltaH= -5113.3 kJ What is the standard enthalpy of formation of this

    asked on January 29, 2012
  5. Physics

    A bullet with a mass of 28 g is fired from a 2.8-kg gun that is stationary, but free to recoil. After the bullet is fired, the gun is observed to be moving at 1.4 m/s [left]. What is the velocity of the bullet?

    asked on January 23, 2018
  6. maths

    a car weighing 1600kg moving with a velocity of 30 meter per second retarded uniformly coming to rest in 20 seconds calculate 1, initial momentum 2, final momentum 3, rate of change of momentum 4,acceleration of the car 5, magnitude of the force apply

    asked on January 28, 2016
  7. physics

    a popgun uses a spring for which k = 20 N/cm. when cocked, the spring is compressed 3.0 cm. how high can the gun shoot a 5.0-g projectile

    asked on December 13, 2010
  8. covalent or ionic bond

    Is Mercury (ii) Chloride a covalent bond or ionic?

    asked on May 4, 2009
  9. mathematics

    Two questions here: 1. In a right-angled triangle ABC, catheter AC is 9.4 cm long and catheter BC is 6.2 cm long. D is a point on the catheter AC so that DA = DB. Determine the length of the CD. 2. In a right-angled triangle, the ratio of catheters is 2:

    asked on July 15, 2020
  10. chemistry

    calculate the change in pH when 9.00ml of 0.100M HCl(aq) is added to 100.0mL of a buffer solution that is 0.100M in NH3(aq) and 0.100M NH4Cl(aq). ...Calculate the change in pH when 9.00,L if 0.100M NaOH(aq) is added to the original buffer solution.

    asked on October 28, 2012
  11. math

    what is 22 2/9% as a fraction?

    asked on December 16, 2008
  12. Calculus

    The demand function for the Luminar desk lamp is given by the following function where x is the quantity demanded in thousands and p is the unit price in dollars. p = f(x) = -0.1x2 - 0.3x + 39 (a) Find f '(x). f '(x) = (b) What is the rate of change of the

    asked on June 13, 2013
  13. Chemistry

    In a mountainous location, the boiling point of pure water is found to be 95 degrees Celsius. How many grams of sodium chloride much be added to 1 kg of water to bring the boiling point back to 100 degrees Celsius? Assume that sodium chloride behaves

    asked on September 14, 2010
  14. algebra

    Determine K and M if x=y Does this mean m=0 k=1?

    asked on July 15, 2020
  15. spanish

    We sing a song entitled He drinks tequila,and she talks dirty in spanish ^ there are a couple of phrases that I don't know the meaning of could you help please. the first is "a brasa mi puerta" The second is "to dal ay nochay" I hope this is not offensive

    asked on November 21, 2009
  16. mathematics

    Jessica has received a scholarship. She invests the money in a fund that provides 3.5% in annual interest. By what percentage does the investment grow over five years?

    asked on July 15, 2020
  17. Physics

    A wooden block of mass m = 9 kg starts from rest on an inclined plane sloped at an angle θ from the horizontal. The block is originally located 5m from the bottom of the plane. If the block, undergoing constant acceleration down the ramp, slides to the

    asked on February 3, 2013
  18. Math

    The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 1 4 1 5 2 6 3 7 1 8 1 9 1 10 4 The mean score on this test is: The median score on this test is:

    asked on July 16, 2020
  19. Math

    A colony of bees doubles in population every 5 weeks.hpw long does it take for the population to triple ?

    asked on February 3, 2017
  20. math-

    A new model of car is available in 4 exterior colors and 3 interior colors. Use a tree diagram and specific colors to show how many color schemes are possible for the car. Solve the problem using an alternative method as well.Note that you are asked to

    asked on August 10, 2009
  21. calculus

    A potter forms a piece of clay into a right circular cylinder. As she rolls it, the height h of the cylinder increases and the radius r decreases. Assume that no clay is lost in the process. Suppose the height of the cylinder is increasing by 0.5

    asked on March 31, 2013
  22. physics

    Seat belts and air bags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in the front of the car. In the event of an impact, the passenger compartment decelerates

    asked on October 2, 2010
  23. Algebra

    For the function f (x) = C ∙ a^x the following relation applies: f(6) / f(4) = 0.25 f(2) - f(3) = 20000 Solve f(5) Solve f(x) = 625

    asked on July 15, 2020
  24. Calculus check my answers

    1. The general solution of the differential equation dy - 0.2x dx = 0 is a family of curves. These curves are all: a. lines b. hyperbolas c. parabolas (my answer) d. ellipses 2. The table below gives selected values for the function f(x). Use a trapezoidal

    asked on July 2, 2018
  25. ***PLEASE SCIENCE****

    I have this question: Which is the smallest unit of measurement for temperature? One Celsius degree: one Kelvin:one Fahrenheit. I think it is Kelvin but I can't find anywhere in my book where it refers to that. When I google all three it says Celsius &

    asked on October 10, 2012
  26. Physics- torque

    A man ties one end of a strong rope 8.35 m long to the bumper of his truck, 0.506 m from the ground, and the other end to a vertical tree trunk at a height of 3.92 m. He uses the truck to create a tension of 8.32x10^2 N in the rope. Compute the magnitude

    asked on November 18, 2013
  27. chemistry

    In a particular redox reaction, Cr is oxidized to CrO4^2– and Cu2^+ is reduced to Cu^+ . Complete and balance the equation for this reaction in acidic solution. Cr + Cu^2+ ---> CrO4^2-+ Cu^+ i started off by doing this 2 x SO3^2- ---> SO4^2- + 2e 2 x

    asked on February 13, 2012
  28. Financial Management

    TLB EXHIBIT 1 SUMMARY OUTPUT Regression Statistics Multiple R 0.397871332 R Square 0.158301597 Adjusted R Square 0.146771482 Standard Error 0.099101922 Observations 75 ANOVA df SS MS F Significance F Regression 1 0.134839089 0.134839089 13.72940301

    asked on April 14, 2009
  29. English

    In “A Sound of Thunder,” Travis’s dialogue with Lesperance reveals how upset he is about Eckels’ having left the path. This is an example of direct characterization.******** indirect characterization.

    asked on November 2, 2015
  30. statistics

    Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .

    asked on July 22, 2011
  31. Art 17th Century Europe

    Contrast the "Elevation of the Cross" by Rubens with Rembrandt's Return of the Prodigal Son. How does each work demonstrate the Baroque style? How does each work mirror the social and political climate of the time? **Hope someone can Help,Please! =)

    asked on March 31, 2011
  32. math

    3/5 of a revolution represents approximately how many radians? Question 12 options: 6.28 3.14 3.77 108.00

    asked on January 21, 2018
  33. Algebra

    Which is the degree measure of an angle whose tangent is 5.67? Round the answer to the nearest whole number.

    asked on May 19, 2014
  34. Statistics

    A 95% confidence interval for a population mean, ?, is given as (18.985, 21.015). This confidence interval is based on a simple random sample of 36 observations. Calculate the sample mean, x ?, and the sample standard deviation, s. Assume that all

    asked on June 18, 2012
  35. math

    There are 50 jellybeans which are red, orange, green, and yellow, how many ways can you place the beans in a row providing each color are identical? And, how many handfuls of 12 are possible?

    asked on October 27, 2011
  36. Physics,Science

    Two point charges Q1 = 10µc and Q2 = -2µc are arranged along the x-axis at x = 0 and x =4m respectively. Find the positions along the x-axis where v = 0

    asked on March 24, 2019
  37. Math

    The time t required to drive a certain distance varies inversely with the speed r. If it takes 4 hours to drive the distance at 35 miles per hour, how long will it take to drive the same distance at 45 miles per hour? about 3.11 hours********* 140 hours

    asked on May 11, 2016
  38. Chemistry

    Why are some solutes soluble in water, but others are soluble in cyclohexane?

    asked on November 16, 2017
  39. MATH

    Misu Sheet, owner of the Bedspread Shop, knows his customers will pay no more than $110 for a comforter. Misu Sheet wants to advertise the comforter as "percent markup on cost." a. What is the equivalent rate of percent markup on cost compared to the 30%

    asked on February 16, 2014
  40. Math

    Put the function P= 35(1.3)^t in the form P0ekt When written in this form, you have: K= P0=

    asked on August 28, 2012
  41. Algebra

    Find the correct table of values for the following function:y = x – 3 x y 10 8 8 6 6 4 x y 10 13 8 11 6 9 x y 10 7 8 5 6 3 x y******************** 10 3 8 3 6 3

    asked on January 8, 2016
  42. cHEM

    It is found that 1.431 g of element X contains 7.509 × 1021 atoms. The atomic mass of X is?

    asked on March 14, 2013
  43. Calculus

    Which of the following functions grows the slowest? j(t)=1/4 ln(t^200) a(t)=t^5/2 i(t)=ln(t^100) g(t)=3t^2-t b(t)=t^4-3t+9

    asked on July 5, 2019
  44. Calculus

    The function f is continuous on the open interval (-π, π). If f(x)=cos(x)-1/xsin(x) for x≠0, what is the value of f(0)?

    asked on October 19, 2016
  45. Physics Quesion

    A .140 kg baseball is thrown with a velocity of 41.4 m/s. it is struck with an average force of 5000N, which results in a velocity of 37 m/s in the opposite direction. How long were the bat and ball in contact?

    asked on November 28, 2012
  46. Chemistry

    For which of the following aqueous salts will electrolysis produce hydrogen gas and oxygen gas? Answered the hint in Mastering Chem & looked over the book and I still have no idea. Check all that apply: A) NiF_2(aq) B) NaF(aq) C) NiI_2(aq) D) NaI(aq) E)

    asked on November 8, 2012
  47. statistics

    3. Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw

    asked on July 19, 2012
  48. customer service

    Of the characteristics common to good listeners, which do you consider the most important in a customer service organization? Explain your answer.

    asked on August 11, 2009
  49. english

    What story elements help support an author’s perspective in a text? Select all that apply. supporting ideas details** organizational structure** tone**

    asked on December 3, 2019
  50. Math-college

    Can you please help with this one. Find an​ nth-degree polynomial function with real coefficients satisfying the given conditions. n=4 2 i and 4 i are zeros; f(-1)=85 f(x)= ​(Type an expression using x as the variable. Simplify your​ answer.)

    asked on July 24, 2017
  51. chemistry

    if a solution contains 255mL of ethanol and 375 mL ofwater, what is the percent of ethanol in the soution

    asked on June 10, 2012

    A single card is selected from an ordinary deck of cards. The sample space is shown in the following figure. Find the following probabilities. (Enter the answers either as fractions or as decimals rounded to three places.) P(five of clubs) = Incorrect:

    asked on May 23, 2012
  53. Algebra

    Tom drove to Easton from home at 50 mph. His return trip took 30 minutes longer because he ran into traffic and could only drive 45mph. How many miles is it from Tom's home to Easton? Express answer as a decimal.

    asked on February 8, 2011
  54. Physics

    Suppose with 200 N of force applied horizontally to your 1500 N refrigerator that is slides across your kitchen floor at a constant velocity. What are thre friction forces on the refrigerator?

    asked on November 22, 2010
  55. Chemistry

    Calculate Delta G for the spontaneous cell produced from the following: Al^3+ + 3e^- -> Al (s) Mg^2+ + 2e^- -> Mg (s) In order to solve this, you need to determine the half reactions..ie which is reduced and which is oxidized. How do I know which one is

    asked on November 11, 2010
  56. chemistry

    A 2.118 g sample of a solid mixture containing only potassium carbonate ( MM=138.2058 g/mol ) and potassium bicarbonate ( MM=100.1154 g/mol ) is dissolved in distilled water. A volume of 30.20 mL of a 0.763 M HCl standard solution is required to titrate

    asked on October 19, 2019
  57. Math

    A ship is sailing due north. At a certain point the bearing of a lighthouse is N 40∘E and the distance is 15.5. After a while, the captain notices that the bearing of the lighthouse is now S 54.9∘E. How far did the ship travel between the two

    asked on March 1, 2017
  58. Math

    Nine more than the product of 9 and Malik's age Use the variable m to represent Malik's age

    asked on August 17, 2016
  59. Math Please Help Quick

    The probability of winning a game is 20%. If you play 20 times, how many times should you expect to win?

    asked on June 2, 2016
  60. Math

    Write a function rule that represents the sentence. C is 8 more than half of n. c=8+n/2****** c+8=n/2 c+8=1/2+n c=n/2-8

    asked on October 25, 2015
  61. Accounting

    Samuels, Inc. reported net income for 2011 is $105,000. During 2011 the company had 5,000 shares of $100 par, 5% preferred stock and 20,000 of $5 par common stock outstanding. Samuels’ earnings per share for 2011 is A.$4.00 B.$5.25 C.$6.50 D.$5.00

    asked on June 9, 2013
  62. calculus

    A conical water tank with vertex down has a radius of 12 feet at the top and is 23 feet high. If water flows into the tank at a rate of 20 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 17 feet deep?

    asked on November 30, 2012
  63. physics 209

    A mass m = 0.5 kg is hung from a pulley with moment of inertia I = 0.20kg⋅m2 and radius R = 10cm. There is friction in the pulley. The mass is dropped from rest, and after 2s it traveled 0.4m. What is the torque due to friction?

    asked on November 19, 2012
  64. Math

    Two fire towers are 30 kilometers apart, tower A being due west of tower B. A fire is spotted from the towers, and the bearings from A and B are E 14 degrees N and W 34 degrees N, respectively. Find the distance d of the fire from the line segment AB.

    asked on May 10, 2011
  65. Business Finance

    A firm has invested in corporate bonds it may engage in a financial futures contract in order to protect itself from what.

    asked on February 14, 2010
  66. Chemistry check Please

    The question is: Find the following quantities the volume, in liters, of 835 g SO3 at STP My answer is: 1 mol of SO3=80g 835g/80g = 10.44 mols v = (10.44 x 8.314 x 273)/100 = 236 L Can someone tell me if I did it correct. Thanks very much.

    asked on March 9, 2009
  67. GP

    two consecutive terms of a GP are the 2nd ,4th and 7th terms of an A.P respectively.find the common ration of the GP

    asked on July 27, 2016
  68. Physics

    An interacting system of two objects has no external force acting on the system. The first has a mass of 2.00kg and is moving with a velocity (2.00m/s)i + (1.00m/s)j at time t=0s. The second object has a mass of 3.00kg and is moving with a velocity

    asked on November 9, 2014
  69. Algebra Word Problems

    Barges from ports X and Y went to cities A and B. X sent 32 barges and Y sent 8. City A received 22 barges and B received 18 Shipping costs $220 from X to A, $300 from X to B, $400 from Y to A, and $180 from Y to B $9280 was spent How many barges went

    asked on December 19, 2009
  70. Math

    Michael has a weekly food budget of $62. If he plans to budget the same amount for each of the seven days of the week what is the maximum amount he can spend on food each day?

    asked on October 30, 2019
  71. science

    After an athlete has completed a 100 meter sprint, his/her breathing rate will be greatly increased, and they need time to "catch their breath." Can you identify the process that leads to a person needing to catch their breath? Ans: Hypertrophy

    asked on January 8, 2019
  72. geometry

    A 4​-ft vertical post casts a 20​-in shadow at the same time a nearby cell phone tower casts a 115​-ft shadow. How tall is the cell phone​ tower?

    asked on June 5, 2017
  73. English/Language Arts

    Which of the following parenthetical citations is placed and punctuated correctly? A)The only casualty on Lewis and Clark's trip died from appendicitis (Davis 104). B)(Davis, 104) Kenneth Davis explains that the only casualty on Lewis and Clark's trip died

    asked on May 19, 2016
  74. economics

    3. The following facts characterize the furniture industry in the United States:39 a. The industry has been very fragmented, so that few companies have the financial backing to make heavy investments in new technology and equipment. b. In 1998, only three

    asked on May 3, 2015
  75. English II B

    Deana created a computer-assisted slide show. To make the slide show legible, what is one thing she needs to avoid? A)typing bullets in a small font B)adding color and effects to the font C)printing handouts on paper D)adding tables and graphics

    asked on April 3, 2014
  76. statistics

    a quiz consists of 30 true or false questions. if the student guesses on each question, what is the standard deviation of the number of correct answers

    asked on April 29, 2013
  77. Physics

    During the Olympic ice competition, Boris (m = 75 kg) glides at 1.8 m/s to a stationary Juliette (52 kg) and hangs on. How far will the pair slide after the “collision” if the coefficient of kinetic friction between the ice and their skates is .042? My

    asked on November 23, 2010
  78. Physics

    Question: The amount of internal energy needed to raise the temperature of .25 kg of water by 0.2 degrees Celsius is 209.3 J. How fast must a 0.25 kg baseball travel in order for its kinetic energy to equal this internal energy? KE = (.5)(m)(v^2) 209.3 J =

    asked on February 15, 2010
  79. Math

    Tom Schriber, a director of personnel of Management Resources, Inc., is in the process of designing a program that its customers can use in the job-finding process. Some of the activities include preparing resumés, writing letters, making appointments to

    asked on November 8, 2019
  80. Math-college

    Find an​ nth-degree polynomial function with real coefficients satisfying the given conditions. n=4; i and 3 i are zero; f(-2)=65 f(x)= An expression using x as the variable. Simplify your​ answer.

    asked on July 25, 2017
  81. Math

    Let r(t) be a differentiable function that is positive and increasing. The rate of increase of r^3 is equal to 12 times the rate of increase of r when r(t)=?

    asked on October 3, 2016
  82. Statistics

    The coding department of a large physician clinic is interested in purchasing a software program that will edit claims before they are sent out to billing. The license fee for the software costs $34,000 per year. The software is expected to reduce the

    asked on October 30, 2013
  83. Calculus

    A car leaves an intersection traveling west. Its position 5 sec later is 22 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position 5 sec later is 27 ft from the intersection. If the speed of

    asked on June 13, 2013
  84. Physics

    A 5000 kg African elephant has a resting metabolic rate of 2500 W. On a hot day, the elephant's environment is likely to be nearly the same temperature as the animal itself, so cooling by radiation is not effective. The only plausible way to keep cool is

    asked on January 3, 2013
  85. algebra

    3 times the difference of 7 and d

    asked on September 6, 2010
  86. General Physics

    During heavy rain, a section of a mountainside measuring 2.5 km horizontally, 0.80 km up along the slope, and 2.0m deep slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 0.40km

    asked on August 21, 2010
  87. Algebra 1

    Write an equation for for each translation of y=|x| 1. left 2 units y = |x| consists of two 45 degree curves joined at the origin: y = x for x>0, and y = -x for x < 0. To move the curves to the left 2 units, you want the sign of the term inside the

    asked on January 7, 2007
  88. math

    2x + 3y = 78 How do i solve for x and y? 2x=78 78/2=39 so x=39 3y=78 78/3=26 so y=26 Can't be, because 2(39)+ 3(26) does not equl 78 You need TWO equations when you have TWO variables, such as x and y. It can't be done with one equation. BUT, you say, what

    asked on November 3, 2006
  89. french

    write a letter in french to your penpal inviting him or her to your birthday party

    asked on August 11, 2019
  90. Math

    The equation xy-1=x+y^2 defines a function y=f(x) in a neighborhood of (-1,0). Determine f(-1), fx(-1), and fxx(-1) and the second -taylor polynomial t2 (x) based around x=-1

    asked on April 24, 2019
  91. Math

    Help! I need the work and how to check it too! Victoria and Georgetown are 36.2 mi from each other. How far apart would the cities be on a map that has a scale of 0.9 in: 10.5 mi?

    asked on April 13, 2018
  92. American Gov.

    Which of the following does the free exercise clause of the first amendment protect? a. Teacher-led prayers in schools b. attending church c. the establishment of a state religion d. nurses reading the Bible to patients in a public hospital. My answer is

    asked on November 2, 2016
  93. HVAC

    A gas is compressed inside a compressors cylinder. When the piston is at its bottom dead center , the gas is initially at 10 psig , 65 degree and 10.5 in. After compression and when the piston is at top dead center the gas is 180 degree and occupies 1.5

    asked on November 19, 2015

    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 on June 3, 2012
  95. statistics

    The U.S. Department of Agriculture claims that the mean consumption of coffee by the person in the United States is 24.2 gallons per year. A random sample of 120 people in the United States shows that the mean coffee consumption is 23.5 gallons per year

    asked on April 2, 2012
  96. Physics

    A spring is hung from the ceiling. When a coffee mug is attached to its end, it stretches 3.0 cm before reaching its new equilibrium length. The block is then pulled down slightly and released. What is the frequency of oscillation?

    asked on November 30, 2010
  97. science

    (a) Find the concentration of H+, HCO3 - and CO3 2-, in a 0.01M solution of carbonic acid if the pH of this is 4.18. Ka1(H2CO3)=4.45 10–7 andKa2 =4.69 10–11 (b).Calculate the pH at the equivalence point of the titration between 0.1M CH3- COOH ( 25 ml)

    asked on April 16, 2019
  98. Algebra

    If a and b are integers such that a^2− b^2 = 100, what is the greatest possible value of a?

    asked on October 8, 2018
  99. Math

    The toco toucan, the largest member of the toucan family, possesses the largest beak relative to body size of all birds. This exaggerated feature has received various interpretations, such as being a refined adaptation for feeding. However, the large

    asked on February 8, 2018
  100. Physics

    An arrow slows down from 43 m/s to 28 m/s as it passes through an apple. If the 493 g apple was originally at rest and sped up to 0.44, what must be the mass of the arrow?

    asked on January 23, 2018


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