Popular questions and responses by Andy
  1. Pre calc

    sin(θ + ϕ); sin(θ) = 5/13 θ in Quadrant I, cos(ϕ) = − 2root 5 over 5 ϕ in Quadrant II please give final answer this is bc i have a lot of trouble simplifying the final answer thank you

    asked on April 11, 2017
  2. Maths Lit, Accounting, Economics, Business Studies

    I am a grade 10 learner doing Maths Literacy, Accounting, Business Studies, Economics, Life Orientation, English and Afrikaans I want to know what Degree I can study in University and also to check what career path I would be able to do.

    asked on August 5, 2015
  3. Chemistry

    What is the correctly balanced reaction for a Li-Cr voltaic cell?

    asked on July 23, 2020
  4. Chemistry

    Changing the temperature of an electrochemical cell will affect which two variables? A: the reactivity of the metal electrode and the concentration of the electrolyte fluid B:the free energy of the half-reaction and the reaction rate C: the free energy of

    asked on July 23, 2020
  5. math

    a pantry contains 6 shelves each 42 inches long. the shelves are to be reclined with fresh paper. the paper is sold in 1 yard rolls. the number of 1 yard rolls needed is:

    asked on August 13, 2015
  6. trig

    Let (theta) be an angle in quadrant II such that csc(theta)=8/5 Find the exact value of tan(theta) and cos(theta).

    asked on May 10, 2011
  7. Corporate Finance

    19. Fool Proof Software is considering a new project whose data are shown below. The equipment that would be used has a 3-year tax life, and the MACRS rates for such property are 33%, 45%, 15%, and 7% for Years 1 through 4. Revenues and other operating

    asked on March 1, 2010
  8. physics

    Spaceship I, which contains students taking a physics exam, approaches Earth with a speed of 0.640 c, while spaceship II, which contains instructors proctoring the exam, moves away from Earth at 0.280 c, as in Figure P26.27. If the instructors in spaceship

    asked on April 16, 2010
  9. books "A Thankless Experience" Short Essay Help

    This is the story: A Thankless Experience by Stephen Lautens. The story is on the internet. jiskha does not allow me to post the url The question is: Provide two examples of figurative language used by Lautens in his essay and describe the effect of each

    asked on September 25, 2013
  10. Calculus

    The curve y = x/(1 + x^2) is called a serpentine. Find an equation of the tangent line to this curve at the point(2, 0.40).(Round the slope and y-intercept to two decimal places.)

    asked on November 2, 2011
  11. physics

    A car weighing 1.0 x 10^4N is parked on a 34 degree slope. The brakes fail and the car starts to slide down the hill. Assume no friction. Show your work, and determine a) the acceleration of the car, and b) after it has moved 28.0 m, how fast is it moving?

    asked on November 2, 2014
  12. chemistry

    The solubility product constant (Ksp) for the dissolution of PbSO4 as represented by the chemical equation is 1.7x10-8. PbSO4 (s)= Pb2+ (aq) + SO42- (aq) Calculate the mass (g) of PbSO4 that dissolves in 1100 mL of water.

    asked on May 13, 2010
  13. pre calc

    tan(θ + ϕ); cos(θ) = − 1/3 θ in Quadrant III, sin(ϕ) = 1/4 ϕ in Quadrant II I am really struggling with this idk why I keep getting the wrong answers

    asked on April 11, 2017

    although helium atoms do not combine to form He2 molecules is it fair to say that London dispersion forces (induced dipole forces)are what attract He atoms weakly to one another? The other choices are dipole-induced dipole forces Hydrogen bonding

    asked on May 11, 2010
  15. CHEMISTRY!!/science

    A mixture of CO2 and an unknown gas was allowed to effuse from a container. The carbon dioxide took 1.25 times longer than the unknown gas to escape.Which of the following gases could the unknown one be Choices A: Cl2 B: CO C: HCl D: H2 E: SO2 I am going B

    asked on May 10, 2010

    Which of the following is NOT a postulate of the kinetic molecular theory? A; the average kinetic energy of the particles is directly proportional to the absolute temp. B;the forces of attraction and repulsion between the particles are insignificant C:the

    asked on May 10, 2010
  17. Chemistry

    15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.23M lead(II) nitrate solution. What mass of precipitate will form?

    asked on September 28, 2014
  18. Physical Edu

    The transformation of love progresses in the following way: a. high levels of passion, increasing intimacy, diminished romance, enduring love. b. high levels of passion, increasing intimacy, diminished romance, breakup of relationship c. sex, passion,

    asked on June 18, 2012
  19. Finance

    You want to be able to withdraw $25,000 from your account each year for 20 years after you retire. If you expect to retire in 25 years and your account earns 7% interest while saving for retirement and 6.7% interest while retired Round your answers to the

    asked on April 27, 2016
  20. science

    I need an acrostic poem about forces

    asked on December 7, 2015
  21. hysical edu

    Roger is a single father of two young daughters and has been dating Cheryl for the past two years. He recently learned that his company is going to downsize. Although Roger is financially stable, he is worried that his job is in jeopardy. He hasn't told

    asked on June 18, 2012
  22. Math

    Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 400 more points than Katie. If you let l= l= the number of points that Lisa scored, and k= k= the number of points that Katie scored, then the problem can be

    asked on May 30, 2016

    the volume of a sample of gas is at STP. what volumes will the sample occupy at 0.0degrees celsius and 950.torr??? is it

    asked on May 12, 2010
  24. English

    clive looked up at a dictionary page with the guide words - MOB and MOP write a list of words that might be found on the page pleasehelp

    asked on August 27, 2019
  25. A Thankless Experience

    I really need help on this question it is worth 5 marks. The question is: Explain how "A Thankless Experience" is a satire with support with direct reference to the essay. The short essay is called A Thankless Experience by Stephen Lautens' Thank you :)

    asked on September 28, 2013
  26. physics

    Along a straight road through town, there are three speed-limit signs. They occur in the following order: 56 , 33 , and 24 mi/h, with the 33 -mi/h sign located midway between the other two. Obeying these speed limits, the smallest possible time tA that a

    asked on September 8, 2012
  27. physical Edu

    Which is a common expectation that can hurt a relationship? a. expecting your partner to change b. expecting that your partner loves you c. expecting intimacy d. expecting that you can trust your partner is it A

    asked on June 18, 2012
  28. physcial Edu

    All of the following are recommended by your text as time-management strategies, EXCEPT a. setting priorities. b. breaking down long-term goals into short-term ones. c. avoiding unstructured time. d. keeping track of tasks you put off. is it C

    asked on June 18, 2012
  29. income tax

    Marion drives 20 miles a day from his first job to his second job. He worked 125 days during 2011 on both jobs. What is Marion's mileage deduction rounded to the nearest dollar assuming he uses the standard mileage rate and mileage is incurred ratably

    asked on March 21, 2012
  30. tax

    In order for an employee to deduct home office expenses, which of the following must occur? a. There must be no other fixed business location. b. The taxpayer's most important activities must occur in the home. c. The home office must be for the

    asked on March 20, 2012
  31. tax

    At the beginning of 2011, Melissa was permanently transferred from her office in New York City to New Jersey. Her office in NYC is 15 miles from her old NY home. For Melissa to meet the distance test for qualifying moving expense deductions, how many miles

    asked on March 7, 2012
  32. tax

    In 2011, the Chens' pleasure boat was severely damaged by a hurricane in an area that was declared a federal disaster area. They had AGI of $110,000 in 2011. The following information relates to the craft: cost basis $95000 FMV before casualty $145000 FMV

    asked on March 7, 2012
  33. Chemistry

    How many liters of excess reactant would be left when 3.00 liters of nitrogen monoxide is mixed with 2.00 liters of oxygen and allowed to react at 695 torr and 27 degrees Celsius to produce nitrogen dioxide

    asked on July 26, 2011
  34. Physics

    A block of mass 5kg is lifted 2m in 3sec. Find the work done.

    asked on April 22, 2011
  35. chem can u check answer please

    what is the hydrogen ion concentration of an aqueous solution with a pOH of 9.262? I got 5.47X 10 ^-10 is this correct? Thanks Andy

    asked on May 23, 2010

    Bromine exists as a mix of bromine 79 and bromine 81 isotopes. an atom of bromine 79 contains: 35 prot.44.neutr.35 electrons 35 prot.and 35 electrons only 44 prot.44 elect and 35 neutr. 35 prot.79 neutr. and 35 electrons 79 protons 79 electrons and 35

    asked on May 12, 2010
  37. Algabra

    !@#$%^& is younger than Tom, but older than Harry. Their ages in years are consecutive odd integers. !@#$%^&'s mother is three times as old as !@#$%^&, and she is also 13 years older than twice as old as Tom. How old are Harry, !@#$%^&, and Tom

    asked on September 26, 2016
  38. Collage Physic

    A uniform rod hangs vertically on a frictionless horizontal axle passing through its center. The rod is 35cm long and 85g. A 15g ball of clay travelling horizontally at 2.5cm/!@#$%^&s and sticks to the bottom of the rod. What is the maximum angle the rod

    asked on March 28, 2016
  39. chemistry

    What type of chemical rxn is Na2SO4(aq) +Ba(NO3)2(aq) the product is BaSO4(s) + 2NaNO3(aq)?what is its net ionic equation?

    asked on September 3, 2014
  40. Math

    If A represents the number of apples purchased at 15 cents each, and B represents the number of bananas purchased at 10 cents each, which of the following represents the total value of the purchases in cents? a) A+B b) 25(A+B) c)10A+15B d) 15A+10B

    asked on November 30, 2012
  41. Microeconomics

    3. An industry currently has 100 firms, all of which have fixed costs of $16 and average variable cost as follows: Quantity Average Variable Cost 1 $1 2 2 3 3 4 4 5 5 6 6 1) The price is currently $10. What is the total quantity supplied in this market? 10

    asked on April 28, 2012
  42. Chemistry

    Experiment Na2C2O4 is added to Pb(NO3)2.Precipitate forms (I think its PbC2O4). After the liquid above was decanted to another container. Dilute HNO3(aq) was added to it. The decanted cloudy solution cleared up a little but it was kinda cloudy still. Im

    asked on April 1, 2012
  43. law

    Which of the following is NOT truly an advance directive? A. Living will B. Do not resuscitate order C. Advance funeral arrangements D. Designation of a health care surrogate is it B im confused

    asked on February 3, 2012
  44. Chemistry (The Composition of an Atom)

    In 1808, John Dalton wrote his atomic theory of matter. The following is a list of points from that theory. If it is still considered true today, label it true. If it is not considered true today, label it false. 1)Atoms cannot be subdivided. 2)Atoms

    asked on April 14, 2011
  45. Corporate Finance

    1. The Federal Reserve recently shifted its monetary policy, causing Lasik Vision's WACC to change. Lasik had recently analyzed the project whose cash flows are shown below. However, the CFO wants to reconsider this and all other proposed projects in view

    asked on March 1, 2010
  46. physics

    A wheel initially rotating at an angular speed of 1.2 rad/s turns through 34 revolutions during the time that it is subject to angular accelaration of .4 rad/s/s. How long did the accelaration last? So I used theta=Wot+.5at^2. converted rev to rad. and set

    asked on November 18, 2009
  47. Physics 11

    SPH3U1 Two blocks of mass 500.0 g and 200.0 g are suspended vertically as shown in the diagram. The top string is lifted vertically upwards with a force of 8.48N on the 500.0 g Block (sorry no diagram) Thank you very much for your help

    asked on October 15, 2009
  48. Math

    a gasoline pump delivers 4 2/5 gallons of gas per minute. How many minutes will it take to fill a gas tank that holds 16 1/2 gallons?

    asked on December 11, 2008
  49. Pre-Calculus

    A drug manufactured by a pharmaceutical company is sold in bulk at a price of $150 per unit. The total production cost (in dollars) for x units in one week is C(x) = 0.02x^2 + 100x + 3000. How many units of the drug must be manufactured and sold in a week

    asked on July 19, 2017
  50. statistic

    Although there is a popular belief that herbal remedies such as Ginkgo biloba and Ginseng may improve learning and memory in healthy adults, these effects are usually not supported by well-controlled research (Persson, Bringlov, Nilsson, and Nyberg, 2004).

    asked on June 24, 2017
  51. Calc

    Compute Δy and dy for the given values of x and dx = Δx. y = x^2 − 7x, x = 6, Δx = 0.5

    asked on February 26, 2017
  52. LA

    Rewrite using a possessive noun: the (separate) bikes of Keith and Frank, the brooms of the witches, and the dog of Mike and Erin

    asked on January 11, 2017
  53. Physics

    A 25 g bullet with a muzzle velocity of 300 m/s is fired into a board 4.0 cm thick. For a soft board, the bullet goes through the board and emerges with a speed of 50 m/s. What was the average force exerted on the bullet by the board? Answer= 27344 N Show

    asked on March 18, 2016
  54. AP Calculus AB

    Hello! I'm having trouble with this related rates problem: A 5ft tall person is walking away from a 16ft tall lamppost at a rate of (2/x) ft/sec, where x is the distance from the person to the lamppost. Assume the scenario can be modeled with right

    asked on October 4, 2015
  55. math

    Nolan practices the piano for 1 2/5 hours every Saturday and Sunday. How long does he practice each weekend? Express your answer in hours and minutes.

    asked on March 17, 2015
  56. physics

    what is the heat required to convert 0.1 kg of melting ice into steam at 100 degree celcius

    asked on May 20, 2014
  57. chemistry

    What would Qc be if the volume of the container decreased by a factor of 1.774 for the following reaction? PH3(g) + BCl3(g) → PH3BCl3(s) KC = 534.8 at 353.0oC

    asked on May 6, 2014
  58. Chemistry

    For the reaction given, the value of the equilibrium of the constant at 400 K is 7.0. Br2(g)+ Cl2(g)=2BrCl(g) Does the: Reaction proceed to the left? Reaction proceed to the right? Partial pressure represent a system in an equation?

    asked on February 21, 2014
  59. Chemistry

    What is the lattice energy of NaI? Use the given information below. Heat of formation for NaI = -288.0 kJ/mol Heat of sublimation for Na = 107.3 kJ/mol Ionization energy for Na = 496.0 kJ/mol Bond dissociation energy for I2 = 149 kJ/mol Electron affinity

    asked on November 22, 2013
  60. Physics

    elbow raises a 1200 N piano a distance of 5 meters using a set of pulleys. elbow pulls in 20.0 meter of rope while exerting a force of 340 N. a) what is the work output? b) what is work input c) what is the mechanical advantage of this machine? d) what is

    asked on November 3, 2013
  61. Geometry

    Circle G with center O is tangential to PA at A . Line PO extended intersects G at B (PO

    asked on April 16, 2013
  62. Math (Pre-Cal)

    The infinite series S = 1/5 + 3/5^3 + 5/5^5 + 7/5^7 + 9/5^9 + ... converges. Find S.

    asked on February 11, 2013
  63. physics

    A diver springs upward from a board that is 3.90 m above the water. At the instant she contacts the water her speed is 14.9 m/s and her body makes an angle of 60.3 ° with respect to the horizontal surface of the water. Determine her initial velocity, both

    asked on September 15, 2012
  64. physics

    A golf ball is dropped from rest from a height of 8.20 m. It hits the pavement, then bounces back up, rising just 5.40 m before falling back down again. A boy then catches the ball when it is 1.40 m above the pavement. Ignoring air resistance, calculate

    asked on September 8, 2012
  65. physical Edu

    The fight-or-flight response prepares the body for physical action regardless of whether action is needed. is it True

    asked on June 18, 2012
  66. Chemistry

    A saturated aqueous solution of calcium hydroxide has a pH of 12.25. What is the [Ca 2+] of such a solution?

    asked on April 14, 2012
  67. income tax

    Which of the following conditions requires an employer to use the electronic deposit requirement? A. Employer made more than $100,000 in total tax deposits in 2009. B. Employer made more than $100,000 in total tax deposits in 2010. C. All employers are

    asked on April 4, 2012
  68. Tax

    Kobe is a single dad with two dependent children, Lizzie, age 7 and Leslie, age 3. He has AGI of $51,000 and paid $6,300 to a qualified day care center. What amount of credit can Kobe receive for the child and dependent care credit? A. $600 B. $1,200 C.

    asked on April 2, 2012
  69. tax

    Taxpayers who contribute to or withdraw from an HSA during the year must: A. attach a written note to their tax return. B. file a Form 8889 and attach it to their Form 1040. C. do nothing. D. report it on Schedule A. is it B

    asked on March 7, 2012
  70. Legal Research

    Can somebody please help me with his I don't know what to do? While researching a legal issue for your supervising attorney, you stumble across a brand new decision that appears to pertain to your research assignment. The ruling court just ruled on the

    asked on December 23, 2011
  71. Math - Data Management

    I'm kinda stuck on my math homework, does anyone know how to do it? The results of a blood test at a medical lab are normally distributed with a mean of 60 and a standard deviation of 15. How low must a score be to lie in the lowest 5% of the results?

    asked on June 9, 2011
  72. Algebra 1

    Explain the differences between solving these two equations: •log3(x - 1) = 4 AND log3(x - 1) = log34 I think it has to deal with the formulas?

    asked on February 8, 2011
  73. science

    Do plants grow better with tap water or distilled water?

    asked on October 23, 2010
  74. Biology

    Under what conditions does asexual reproduction in sponges occur? Does it depend on time of year, availability of food, or other factors?

    asked on May 30, 2010

    I am confused about this statement about water Which of the following is TRUE regarding water only covalent bonds are broken when ice melts (dont think so) all of the staements (A-D) are false energy must be given off in order to break down the crystal

    asked on May 11, 2010
  76. science/chemistry

    Dr Bob Although helium atoms do not combine to form He2 molecules. is it true to say that He atoms are weakly attracted to one another from London dispersion forces (induced dipole forces) or is there another force at play? It cant be Hydrogen

    asked on May 11, 2010
  77. chemistry

    I also had a problem with this type of questionthe initial pressure of NOCl(g) is 4.329 atm, calculate the % of NOCl(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 400.0 °C is 1.99. The initial

    asked on April 8, 2010
  78. Corporate Finance

    1. Langston Labs has an overall (composite) WACC of 10%, which reflects the cost of capital for its average asset. Its assets vary widely in risk, and Langston evaluates low-risk projects with a WACC of 8%, average projects at 10%, and high-risk projects

    asked on March 1, 2010
  79. trig

    A population of wolves in a country is represented by the equation p(t)=80(0.98)^t, where t is the number of years since 1998. Predict the number of wolves in the population in the year 2008.

    asked on January 31, 2010
  80. trig

    lx - 2l - lx + 2l > x The absolute value of x - 2 minus the absolute value of x + 2 greater than x. What is the Answer Please Help!

    asked on October 28, 2009
  81. physics incline

    A cord connected at one end to a block which can slide on an inclined plane (incline 27 degrees) has its other end wrapped around a cylinder resting in a depression at the top of the plane (and the other angle at bottom is not a right angle, but 58

    asked on May 22, 2009
  82. English

    Please check my essay and make corrections. In the famous play, Julius Caesar, the most important characters would have to be Caesar and Brutus. Each character has its distinctive role, Caesar as the ruler of Rome and Brutus as one of the Caesar¡¯s best

    asked on January 7, 2009
  83. Chemistry

    3Cu+8HNO3--> 3Cu(NO3)2+ 2NO+4H2O How many moles of HNO3 are required to react with 6 moles of Cu? How many moles of Cu(NO3)2 are produced when 3 moles of Cu react? How many moles of Cu must react to produce 4 moles of NO? If 4 moles of NO are produced, how

    asked on July 24, 2008
  84. science and medicine

    I don't have any idea how to solve this. Could someone show me the steps in solving this word problem? I am at a loss! Abus leaves a station at 1 pm., traveling west at a rate of 44 mi/h. One hour later a second bus leaves the same station, traveling east

    asked on March 21, 2007
  85. Science

    Why pars distalis is not a good candidate for transplantation?

    asked on May 2, 2020
  86. Algebra

    Find all of the points of the form (x, −1) which are 4 units from the point (3,2)

    asked on August 22, 2017
  87. Calculus - Related Rates

    A road perpendicular to a highway leads to a farmhouse located 5 miles away. An automobile traveling on the highway passes through this intersection at a speed of 65mph. How fast is the distance between the automobile and the farmhouse increasing when the

    asked on April 25, 2017
  88. Pre calc

    sin(θ − ϕ); tan(θ) = 5/12 , θ in Quadrant III, sin(ϕ) = − square root 10 over 10 ϕ in Quadrant IV Please help last one

    asked on April 11, 2017
  89. phsyics

    The x and y components of a certain force are measured and found to be Fx = (68 ± 3)N and Fy =(42 ± 2) N, respectively. Calculate the magnitude of this force? expressing your result to the proper number of significant figures.

    asked on September 25, 2016
  90. 12th grade chemistry

    It is required to titrate ethanol solution .Being available a 0.2mol/l potassium dichromate solution and 4mol/l sulfuric acid solution on the presence of a convenient indicator. a)indicate the glassware used for titration. b)give a brief description of the

    asked on July 12, 2016
  91. art

    how Picasso used shape or form in the Weeping Woman, and the effect of that usage on the artwork.

    asked on January 20, 2016
  92. History of Muslims

    1)what is the reason for the battle of uhud? 2)why did Wahshi al habashi want to kill hamza (the prophet mohammad's uncle)? 3) What was the prophet's plan on this battle ? 4)how many soldiers were in the muslims army and in the meccan army? 5)Why did the

    asked on November 11, 2015
  93. la check

    which of the following is not a major point of view first person third person fourth person limited (THIS ONE)

    asked on February 24, 2015
  94. physics

    A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +1.2. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror?

    asked on November 6, 2014
  95. Chemistyr

    A 55.29-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 L of solution. How many milliliters of this solution must be diluted with water in order to make 1.00 L of 0.100 M Ba(OH)2? (Ignore significant figures for this problem.)

    asked on September 28, 2014
  96. math

    Math two/y=2 ___ ____

    asked on May 6, 2014
  97. chemistry

    What is the [CH3NH3+] of a solution which is 0.1003 M in CH3NH2 and 0.1204 M in CsOH? CH3NH2(aq) + H2O(l) « CH3NH3+(aq) + OH−(aq)

    asked on May 6, 2014
  98. chemistry

    What is the [C7H5O2−] in a solution which is 0.1283 M in HC7H5O2 and 0.1364 M in HBr? HC7H5O2(aq) + H2O(l) « C7H5O2−(aq) + H3O+(aq) Ka = 6.5000e-5

    asked on May 6, 2014
  99. chemistry

    At 2273 K the equilibrium constant for the reaction 2 NO(g) « N2(g) + O2(g) KC = 2400 What would be the equilibrium concentration of N2 if the initial concentration of NO was 0.1778 M?

    asked on May 6, 2014
  100. chemistry

    At 674.5 K the equilibrium concentrations of N2, H2, and NH3 were 0.1614 M, 0.1128 M, and 0.005892 M, respectively. What is the equilibrium constant for the reaction below? 2 NH3(g) → N2(g) + 3 H2(g)

    asked on May 6, 2014


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