Most popular questions and responses by fred
  1. Language Arts, can anyone check?

    1. Which statement is shared by both "Zoos: Joys or Jails?" and "Why Do We Need Zoos?" a. clearly stated claim b. humorous introduction c. unsupported facts d. one-sided argument 23 Read the passage. What technique is the author using to develop point of

    asked on May 1, 2016
  2. econ.

    2. A company is considering building a bridge across a river. The bridge would cost $2 million to build and nothing to maintain. The following table shows the company¡¯s anticipated demand over the lifetime of the bridge: Price per crossing ($) 8 7 6 5 4

    asked on June 11, 2011
  3. world history

    What impact did the collapse of the Soviet Union have on the end of segregation in South Africa? a- The decline of the Soviet Union allowed for the United Nations to intervene in the segregation policies of the South African government. b-The decline of

    asked on July 30, 2018
  4. chemistry

    Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the platinum atom?

    asked on January 29, 2010
  5. science

    how do i draw a simple particle diagram to show how ear defenders will work

    asked on March 10, 2010
  6. Chem

    Consider a solution that contains both C5H5N and C5H5NHNO3. (Kb for pyridine, C5H5N, is 4.0 x 10^-4) (a) Calculate the ratio of [C5H5N]/[C5H5NH+] if the solution has a pH of 4.50. (b) Calculate the ratio of [C5H5N]/[C5H5NH+] if the solution has a pH of

    asked on April 7, 2009
  7. Chemistry

    what is the molarity of 28.9 g of cacl2 dissolved in water to make 0.78 l of solution

    asked on May 25, 2013
  8. Calculus - Rate of Change

    Can someone explain how to solve this problem? Sand is being dumped on a conveyor belt onto a pile in such a way that the pile forms in the shape of a cone whose radius is always equal to its height. Assuming that the sand is being dumped at a rate of 10

    asked on July 29, 2015
  9. Chemistry

    A solution is 0.10M Pb(NO3)2 and 0.10M AgNO3. If solid NaCl is added to the solution what is [Ag+] when PbCl2 begins to precipitate? (Ksp PbCl2 = 1.7 x 10^-5; AgCl = 1.8 x 10^-10) The answers is 1.4 x 10^-8 How do I find the answer

    asked on October 14, 2012
  10. Reading

    Is these answers correct? devoid infuriate jeopardize smug implore intimidate sibling sneer introvert vivacious 1-2. The people I love best can __me the most. No one can make me as angry as my parents and__s can. I guess close relationships are conducive

    asked on February 27, 2013
  11. Reading

    Is these answers correct? condone, pathetic, feign, precedent, comtemplate gape furtive feasible, fiscal, punitive 1-2. "Would it be__ for us to buy a new copy machine?" Hal asked at the office budget meeting. The boss replied, "Unfortunately, our

    asked on February 27, 2013
  12. Government

    which of the following is an example of the principle of checks and balances? A)President can veto an act of congress. B)Members of congress have the power to raise their own salaries C)Federal courts have the power to hear cases involving federal law

    asked on September 2, 2016
  13. chemistry

    At elevated temperatures, sodium chlorate decomposes to produce sodium chloride and oxygen gas. A 0.8915-g sample of impure sodium chlorate was heated until the production of oxygen gas ceased. The oxygen gas collected over water occupied 57.2 mL at a

    asked on November 20, 2012
  14. Chemistry-w/addition

    At elevated temperatures, SbCl5 gas decomposes into SbCl3 gas and Cl2 gas as shown by the following equation: SbCl5(g) SbCl3(g) + Cl2(g) (a) An 59.8 gram sample of SbCl5 (molecular weight 299.0) is placed in an evacuated 15.0 liter container at 182°C. 1.

    asked on January 15, 2011
  15. PhysicsI

    A windowpane is half a centimeter thick and has an area of 1.0 m2. The temperature difference between the inside and outside surfaces of the pane is 15° C. What is the rate of heat flow through this window? (Thermal conductivity for glass is 0.84

    asked on July 24, 2014
  16. Physics

    A long jumper approaches his takeoff board A with a horizontal velocity of 30ft/s. Find the vertical component (vy) of the velocity of his center of gravity at takeoff for him to make the jump if he lands at a spot 22ft from point A. What is the vertical

    asked on October 4, 2009
  17. Pre-calculus

    A surveyor standing 62 meters from the base of a building measures the angle to the top of the building and finds it to be 38°. The surveyor then measures the angle to the top of the radio tower on the building and finds that it is 45°. How tall is the

    asked on October 29, 2015
  18. Physical science

    flammability is a material’s ability to burn in the presence of? A)hydrogen B)nitrogen C)oxygen D)carbon dioxide I think the answer is A am i right?

    asked on September 14, 2016
  19. math

    Bill takes a lot of $9,000 and an 8% simple interest rate for 6 years How much interest will Bill pay after 2 years? How much interest will he pay in total for the loan ? $720.00;3,600.00 $1,408.00;4,224.00 $36,000.00;12,000.00 $1,440.00;$4,320.00* check

    asked on February 21, 2019
  20. Physics

    A ball of mass 0.640 kg moving east (+x direction) with a speed of 3.10 m/s collides head-on with a 0.780 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision? 1. ball originally at

    asked on November 24, 2009
  21. physics

    An automatic dryer spins wet clothes at an angular speed of 4.4 rad/s. Starting from rest, the dryer reaches its operating speed with an average angular acceleration of 4.2 rad/s2. How long does it take the dryer to come up to speed?

    asked on July 16, 2013
  22. Chemistry

    At elevated temperatures, SbCl5 gas decomposes into SbCl3 gas and Cl2 gas as shown by the following equation: SbCl5(g) SbCl3(g) + Cl2(g) 1. What is the concentration in moles per liter of SbCl5 in the container before any decomposition occurs? 2. What is

    asked on January 15, 2011
  23. Chemistry

    A 25g piece of an unknown metal alloy at 150 degrees Celsius is dropped into an insulated container with 200 g of ice. Calculate the specific heat capacity of the metal, given that 9.0 g of ice melted. How would you work this out?

    asked on July 5, 2016
  24. Chemistry

    How many moles of water can be made from 4 moles of oxygen gas and 16 moles of hydrogen gas? What is the Limiting Reagent?

    asked on March 10, 2010
  25. Math

    A pair of pants costs twice as much as a shirt. The total cost of 1 1 pair of pants and 1 1 shirt is $18 $18 . If s represents the cost of 1 1 shirt, which equation could you use to find the cost of 1 1 shirt?

    asked on December 21, 2016
  26. Physics

    A circular loop with 30 turns and area of 0.25 m2 rotates at 100 rad/s. The axis of rotation of the loop is perpendicular to the direction of the magnetic field of 0.04 Tesla. What is the maximum emf induced in the loop?

    asked on February 2, 2013
  27. Math

    VF is a small accounting firm supporting wealthy individuals in their preparation of annual income tax statement. Every December, VF sends out a short survey to their customers, asking for the information required for preparing the tax statements. Based on

    asked on August 31, 2011
  28. Maths

    A superannuation fund paid 6% p.a. for the first 10 years and then 10% p.a. after that. If Thanh put $5000 into this fund at the end of each year, how much would she have at the end of 25 years? Answer: $466 563.74

    asked on November 24, 2018
  29. Physics

    A conductor of length 2m carrying a 1.5A current experiences a force of 2.2 N. What is the magnitude of the magnetic field that acts perpendicular to the flow of current in the conductor?

    asked on February 2, 2013
  30. physics

    The max speed of a 3.1 kg mass attached to a spring is .68 m/s and the max force exerted on the mass is 11N. What is the amplitude of motion on the mass? What is the force constant of the spring? And what is the frequency of oscillation?

    asked on January 27, 2011
  31. Maths

    Helen has just retired with $500 000 in her account and wishes to start an annuity. She intends to withdraw $M at the end of each year for 30 years. Reducible interest is calculated at 6% p.a., compounded annually just before each withdrawal. a) Calculate

    asked on November 26, 2018
  32. Maths

    Two sides of a rectangle lie along the x and y axes. The vertex opposite the origin is in the first quadrant and lies on 3x + 2y = 6. What is the maximum area of the rectangle? Answer: 1.5 Thanks for any help

    asked on November 19, 2018
  33. Chemistry

    Calculate the number of molecules in a deep breath of air whose volume is 2.25L at body temperature, 37 Celsius, and a pressure of 735 torr. Answer is 5.15 x 10^22 molecules. Help me!

    asked on January 18, 2018
  34. physical science

    an object has 2.0x 10^19 more electrons than protons. What is the net electric charge of this object in coulomb?

    asked on March 17, 2017
  35. math

    Tara will draw a scale model of the garden she wants to plant. Her scale will be 1cm. = 2.5 ft. What will be actual dimensions of Tara's garden?

    asked on April 10, 2019
  36. Physics

    An 1800-kg car starting from rest accelerates constantly during the first 9.50 s of its motion. If the force acting on the car is 2150 N, what is the car;s speed at the end of this time? 2150 N = 1800 kg. (a) a = 1.194 (1.194)(9.5 s) = 11.347 m/s correct?

    asked on October 3, 2006
  37. Chemistry

    How many moles of water can be made from 4 moles of oxygen gas and 16 moles of hydrogen gas? What is the Limiting Reagent?

    asked on March 10, 2010
  38. Calculus

    Which of the following integrals represents the volume of the solid formed by revolving the region bounded by y=x^3, y=1, and x=2 about the line y=10? a) pi*∫from (8-1) of (10-y)(2-y^(1/3))dy b) pi*∫ from (1-2) of (81-(10-x^3)^2)dx c)2pi*∫from (1-8)

    asked on January 4, 2016
  39. science

    Please can someone help me with this question? By official definition, true wilderness is a roadless area with roads only built to its edges. Name some specific wilderness areas that fit this definition. Thanks!

    asked on October 13, 2007
  40. Calculus

    If f(x) = (e^(x))sin(x) what is the 1000th derivative? Step are needed and the general rule/pattern

    asked on April 17, 2010
  41. Chemistry

    How many liters of oxygen gas at 153 degrees celsius and 0.820 atm can be produced by the decomposition of 22.4 g of solid KClO3? (The other decomposition product is solid potassium chloride)

    asked on January 29, 2010
  42. Maths

    A factory sells shoes at $60 a pair. For 10 pairs of shoes there is a discount, whereby each pair costs $58. For 20 pairs the cost is $56 a pair and so on. Find the price of each pair of shoes on an order of 100 pairs of shoes and the total price on an

    asked on October 17, 2018
  43. Math

    How do I convert this decimal into a fraction? 3.083 (The last 3 is repeating by itself)

    asked on October 27, 2013
  44. Physics

    A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed of the electron. What is the ratio of the force experienced by the proton to the electron? Thanks for helping me out

    asked on February 2, 2013
  45. Statistics

    Problem Page In a recent study, males used a new weight-loss supplement, and all but of them experienced weight loss after two weeks. In the same study, females used the same supplement, and all but of them experienced weight loss after two weeks. Fill in

    asked on February 22, 2019
  46. AP Calculus AB

    A helicopter pilot drops a package when the helicopter is 200 ft. above the ground, rising at 20 ft/sec. How long will it take for the package to hit the ground? What is the speed of the package at impact? I know you set s(t) equal to zero, so

    asked on October 12, 2010
  47. More Darn Physics

    what force must be exerted on an electron to move it from a state of rest to a speed of 3.5 x 10^7 m/s in a distance of 0.75 m? Look up the mass of the electron and call it m. Then compute the required acceleration a, using V = sqrt(2 a X) (Solve that for

    asked on October 3, 2006
  48. Maths

    Find the area enclosed between the curves y=(x-1)^2 and y=5-x^2. Answer is 9. Thanks for any help provided

    asked on January 28, 2019
  49. Maths

    Marcus and Rachel want to save up $25 000 for a deposit on an apartment in 6 years' time. They aim to pay around half the deposit each. Marcus invests an inheritance of $9000 in a bank account where it earns 8% p.a. Rachel invests $100 at the beginning of

    asked on October 21, 2018
  50. chemistry

    Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V Can someone please help me? I have the equation: 2Cr +3Pb(+2) --> 2Cr(+3) + 3Pb

    asked on October 21, 2010
  51. math

    Four darts are thrown at the target shown to the right. Assume that each of the darts land within one of the rings or within the bull’s eye. How many different point totals are possible

    asked on June 18, 2019
  52. Maths

    Find the values of x for which the function y = x^2/3 is increasing.

    asked on November 16, 2018
  53. Maths

    If dx/dt=(t-3)^2 and x=7 when t=0, find x when t=4. Answer = 49/3 Thanks for anyone's help

    asked on November 1, 2018
  54. Maths

    A cone shaped vessel has a height of twice its radius. If I fill the vessel with water to a depth of 10 cm, find the volume of water to the nearest cm^3. Answer is 262

    asked on January 4, 2019
  55. Algebra 2

    a company plans to sell embroidered hats for $15. the company's financial planner estimates that the cost, y, of manufacturing the hats is a quadratic function with a y-intercept of 7,920 and a vertex of (150, 9,000). what is the minimum number of hats the

    asked on May 18, 2015
  56. Physics

    Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 40.0s to speed up from rest to its top speed of 1 rotation every 1.40s . The astronaut is strapped into a seat 4.50m from the axis. What is the astronaut's

    asked on February 7, 2011
  57. Physics

    (1) A bullet of mass 1.9×10−3 kg embeds itself in a wooden block with mass 0.987 kg, which then compresses a spring (k = 120 N/m) by a distance 3.5×10−2 m before coming to rest. The coefficient of kinetic friction between the block and table is 0.42.

    asked on October 8, 2010
  58. Science

    It takes a force of 22 N to push a 10 kg box horizontally with a constant velocity over concrete. What is the coefficient of kinetic friction between the box and the concrete? My guess is 10 kg/22 N = 0.4545 but I'm not sure if you have to take in account

    asked on November 30, 2016
  59. Maths

    The bearing of A from B is 060 degrees. What is the bearing of B from A? Is it: a) 60 degrees b) 240 degrees c) 120 degrees d) 200 degrees p.s. The questions I sent earlier was an acccident To get reciprocal bearings, add 180 Thanks bobpursley

    asked on July 1, 2007
  60. PhysicsI

    A puddle holds 150 g of water. If 0.50 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)

    asked on July 24, 2014
  61. LA

    2. Read the passage. What technique is the author using to develop point of view? "Though zoos are meant to be a joy to viewers and teach lessons about our earth, the zoo jails its inhabitants and passes on faulty knowledge." a. state a claim b. persuasive

    asked on May 1, 2016
  62. Physics

    A proton experiences a force of 4 Newton when it enters perpendicular to the direction of the magnetic field with a speed 100 m/s. What is the force experienced by the proton if it enters parallel to the direction of the magnetic field with a speed of 200

    asked on February 2, 2013
  63. biology

    One in every 685 children born in the chicoutimi area of quebec province has tyrosinemia. It is cause by having two copies of the receissive allele. Under the assumptions of Hardy-Weinberg equilibrium, calculate the value of q required to produce this

    asked on September 11, 2012
  64. Chemistry

    A mixture of ethyne ( C2H2 ) and methane ( CH4 ) occupied a certain volume at a total pressure of 16.8 kPa. Upon burning the sample to form CO2 and H2O, the CO2 was collected and its pressure found to be 25.6 kPa in the same volume and at the same

    asked on November 16, 2008
  65. physics

    A student applies an upward force of 49 N to a 5.4-kg physics textbook. Find the book’s acceleration (positive for up, negative for down).

    asked on February 8, 2011
  66. physics

    A child is twirling a 0.0100 kg ball on a string in a horizontal circle whose radius is 0.118 m. The ball travels once around the circle in 0.460 s. (a) Determine the centripetal force acting on the ball. (b) If the speed is doubled, does the centripetal

    asked on October 23, 2010
  67. chemistry

    identify the substance that is is the oxidizing agent and the substance that is the reducing agent

    asked on April 13, 2019
  68. matter and energy

    how much heat must be added to 5.0 g of solid lead at 30 degrees celcius to convert it to liquid lead at the melting point?

    asked on October 1, 2014
  69. Reading

    Is these answers correct? devoid intimidate jeopardize sneer implore introvert sibling vivacious infuriate smug 1-2. The people I love best can __ me the most. No one can make me as angry as my parents and __s can. 3-4. Please don't __ me to help you with

    asked on March 12, 2013
  70. math

    pete colored 1/2 of a poster. rebecca colored 1/3 of a poster. what fraction still needs to be colored?

    asked on March 13, 2012
  71. Trigonometry

    At the ocean, it is known that the tide follows a trigonometric path. At high tide, the water comes in to a point 1 meter from where I placed a flag. At low tide, the water comes in to a point 11 meters from the same flag. The time it takes from to get

    asked on August 15, 2010
  72. Maths

    Mohammed's mother invests $200 for him each birthday up to and including his 18th birthday. The money earns 6% p.a. How much money will Mohammed have on his 18th birthday? Answer = 6181.13

    asked on October 20, 2018
  73. physical science

    a cars radio draws 0.25 A of current in the autos 12 volt electrical system. How much power in watts does the radio use?

    asked on March 17, 2017
  74. Maths

    The curve y = ax^2 + bx + c touches the line y = 2x at the origin and has a maximum point at x = 1. Find the values of a, b and c. (answer: a = -1, b = 2, c = 0)

    asked on November 16, 2018
  75. Maths

    Find the smallest distance between the graphs y=x^2 - 4x + 12 and y=2x + 1. Thanks for any help Answer= 0.894427...

    asked on November 9, 2018
  76. Math

    A football is punted. Its height, H metres is given by the quadratic relation with equation: H = -5t2 + 21t, where t is the time in seconds after the punt. I tried to do this question on a test but I just ran out of time How is the easiest and quickest way

    asked on November 20, 2015
  77. Physics

    If a 1.75 m tall man is looking at a plane mirror from an eye which is 15 cm from the top of their head, what is the minimum length that the mirror must be so that he can just barely see his whole body in the mirror? How far up from the ground must the

    asked on February 18, 2009
  78. maths

    Leila has a number of identical equilateral triangle shaped tiles. How many must she put together in a row (edge to edge) to create a shape which has a perimeter ten times that of a single tile? Answer = 28 Thanks to anyone who helps

    asked on November 2, 2018
  79. Maths

    If both the hour hand and the minute hand start at the same position at 12 o'clock, when is the first time, correct to a fraction of a minute, that the two hands will be together again?

    asked on January 31, 2018
  80. Math

    Help Please. A wireless phone company offers two plans. In one plan, there is a monthly fee of $40 and a charge of $0.25 per minute. In the other plan, there is monthly fee of $25 and a charge of $0.40 per minute. For what number of minutes are the costs

    asked on April 26, 2016
  81. English

    Select the letter of the term that identifies the function of the phrase in parentheses in the following sentence: One goal is (to see potato-starch food boxes rather than Styrofoam ones). a. adjective e. object of a preposition b. adverb f. direct object

    asked on June 12, 2015
  82. MATHS

    ms.sue can you practice me in maths for s.e.a like give me sites to do test then you will correct when i post the answers

    asked on March 17, 2013
  83. Advanced Accounting

    Final Exam ACC440 Problem 1 On January 1, 20X1, Popular Creek Corporation organized RoadTime Company as a subsidiary in Switzerland with an initial investment cost of Swiss francs (SFr) 60,000. RoadTime’s December 31, 20X1, trial balance in SFr is as

    asked on March 24, 2010
  84. history

    Hi. Can someone please help me find alot info for this question. In the 19th century there were many reform movements in america such as slaery, women's suffrage, prohibition, free public education, native american citizenship and many others. What views

    asked on November 28, 2008
  85. calculus

    If a ball is thrown vertically upward with a velocity of 160 ft/s, then its height after t seconds is s = 160t - 16t^2 What is the velocity of the ball when it is 96 ft above the ground on its way up?

    asked on November 14, 2008
  86. chimestry

    more volume of NaOH means more moles of NaOH (volume * molarity = mole ; molarity=constant) , more moles of NaOH means more grams and mole of HCl and more grams and/or mole and/mass of M2CO3 (note that they are both on the same side of the reaction) now

    asked on November 8, 2010
  87. Math. Help Me!..please!

    How do u find similar figures when using a proportion?'cause I don't get it dude. **EXAMPLE-On two sides-72m On the other 2-45m The next one says On one side-50m On the other- 80m Determine whether they are similar. I don't get it. Please help! THANX! it

    asked on April 24, 2007
  88. Physics

    Is there any difference in the effect of linear dilation in between a bar and a hollow bar? Which ones dilates the most? My guess is that the hollow bar as there is less material, so it can be heated up faster. I don't know if I am correct.

    asked on February 11, 2019
  89. Maths

    How much do you need to subtract from 43/10 to make 4?

    asked on November 11, 2017
  90. Statistics

    Which is true about a 99% confidence interval for a population proportion based on a given sample? I. We are 99% confident that the population proportion is in our interval. II. There is a 99% chance that our interval contains the sample proportion. III.

    asked on October 28, 2013
  91. Maths

    A committee of 6 people is to be selected randomly from a group of 11 men and 12 women. Find the number of possible committees if: a) a particular woman is included b) a particular man is not included c) there are to be 4 women and 2 men

    asked on June 4, 2018
  92. Maths

    If sin x = 2/3 and cos y = 3/4, find the exact value of sin ( x + y ).

    asked on April 24, 2018
  93. Chemisty

    How many litres of water at 100°C are vaporized by the addition of 5.00 MJ of heat

    asked on November 7, 2014
  94. Law

    Youth Criminal Justice Act essay? Thesis: The YCJA should be strictly enforced, if it is to be successful. Give 4 possible body paragraph ideas!

    asked on April 2, 2010
  95. Physics

    (1) A virtual image -7 cm tall and 17 cm away from a mirror is created by an object 7 cm away from a mirror. How tall is the object? What kind of mirror created the image? What is its focal length? (2) If a 1.75 m tall man is looking at a plane mirror from

    asked on February 18, 2009
  96. Maths

    Suppose that T= ar^n-1 is a GP with a limiting sum. a) Find the common ratio r if the limiting sum equals 5 times the first term. (Answer: r=4/5) b) Find the ratio if the sum of all terms except the first equals 5 times the first term. (Answer: 5/6) Thanks

    asked on October 24, 2018
  97. Maths

    What is the sum of all numbers ending in 2 or 9 between 1000 and 2000? Answer is 300 100

    asked on October 15, 2018
  98. Calculus

    Linear Approximation Function is y=x2 . Take three points, x=2, x=3, x=4. Approximate this function at these three points for a deviation Δx =0.1. Which of the three points does the approximation works best? Which point does it works worst?

    asked on April 4, 2016
  99. Chemistry

    What kind of reaction is this (redox, precipitation, acid-base, or complex ion formation reaction)? 1. 3 Ca(s) + 2 Al^3+(aq) -> 3 Ca^2+(aq) + 2 Al(s) 2. LiHCO3(s) + heat -> Li2CO3(s) + CO2(g) + H2O(g) Complete the reaction: Ni(s) + 2 Na^+(aq) -> ?

    asked on October 21, 2013
  100. lit

    in "A Pair of Silk Stockings" the silk stockings are a symbol of what?

    asked on October 3, 2012


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