Popular questions and responses by Jim
  1. Math: Please help

    1. What is the simplified form of squared root 140? A.) 4 to the square root of 35 B.) 10 to the square root of 14 C.) 2 to the square root of 70 D.) 2 to the square root of 35 Please show me how to do this Thank You

    asked on March 12, 2013
  2. Math

    13. A catapult launches a boulder with an upward velocity of 148 ft/s. The height of the boulder (h) in feet after t seconds is given by the function h = –16t² + 148t + 30. How long does it take the boulder to reach its maximum height? What is the

    asked on March 11, 2013
  3. world history

    Which power did farmers, merchants, and artisans eventually gain in the roman republic? A. The ability to elect officials who could veto laws harmful to plebeians B. The ability to select patrician consuls C. The right to help Etruscan authorities in

    asked on October 26, 2017
  4. Chemistry

    the activation energy for the decomposition of HI(g) to H2(g) and I2(g) is 186kj/mol. the rate constant at 555k is 3.42 x 10^-7 L/mol*s. What is the rate constant at 645K? Please show all steps USING THE ARRHENIUS EQUATION. Here is my work so far: K = A

    asked on October 26, 2010
  5. Walquist

    Geometry question. a Math riddle. What does a cat need to play baseball?

    asked on December 8, 2008
  6. Calculus

    The function f is continuous on the interval [3, 13] with selected values of x and f(x) given in the table below. Use the data in the table to approximate f '(3.5) x 3 4 7 10 13 f(x) 2 8 10 12 22

    asked on April 6, 2018
  7. Physics

    A box weighing 215 N is placed on an inclined plane that makes a 55 degree angle with the horizontal. Compute the component of the gravitional force acting down the inclined plane.

    asked on November 29, 2010
  8. Physics

    Tree point charges(A---B---C)have equal magnitudes and are located on the same line.? The separation d btw A and B is the same as btw B and C. A is +, B/C are -. Consider the net electrostatic force that each charge experience due to the other two charges.

    asked on August 24, 2011
  9. English

    Type of sentence: To keep your files in order, the filing rules must be learned. (A) Properly constructed (B) Lacks parallel parts (C) Dangler (D) Misplaced part. I believe it to be (A)?

    asked on September 28, 2016
  10. physics

    Find the change in the gravitational force between two planets if the masses of both planets are doubled but the distance between them stays the same. Express your answer as an integer.

    asked on March 8, 2012
  11. physics

    The heat of vaporization of ethyl alcohol is about 200 cal/g.If 2.4 kg of this fluid were allowed to vaporize in a refrigerator, find what mass of ice would be formed from 0 degree C water.

    asked on April 3, 2012

    A ball of mass 0.150kg is dropped from a height of 1.25m. It rebounds from the floor to reach a height of 0.960m. What impulse was given to the ball by the floor?

    asked on March 29, 2008
  13. physics

    The value of g at Earth’s surface is about 9.8 m/s^2. If Earth were of uniform density (same mass/volume throughout), what would the value of g be inside Earth at half its radius?

    asked on March 6, 2012
  14. Chemistry

    what are the intermolecular forces present in: 1. n-propyl alcohol 2. n-butanol 3. 2-butanol 4. tert-butanol alcohol 5. pentane 6. hexanes I know that the forces include- dipole-dipole, ion-dipole, dispersion, and hydrogen bonding...but I don't know how to

    asked on December 21, 2014
  15. Chemistry

    Calculate the enthalpy change (ΔH) for: HCl(aq) + NH3(aq) → NH4Cl(aq) The reaction of 50.0 mL of 1.00 M HCl with 50.0 mL of 1.00 M NH3 causes a temperature rise of 6.4 ˚C in the resulting 100.0 mL of solution. The NH4Cl solution has a density of 1.005

    asked on September 15, 2015
  16. Physics

    Under the influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. When the drive force is shut off, the snowmobile coasts to a halt. The snowmobile and its rider have a mass of 136 kg. Under the

    asked on October 24, 2012
  17. English

    Choose the option that corrects the error in the "quote". If no error exists, choose "No change is necessary." Bill, the foreman of the construction company, is concerned about the safety in the large building. "They have had" three accidents in the past

    asked on November 22, 2015
  18. Physics

    a pendulum-driven clock gains 5.00 s/day, what fractional change in pendulum length must be made for it to keep perfect time?

    asked on November 8, 2017
  19. Chemistry

    What would be the effect of each of the following on the calculated molecular weight of the solute? a) some cyclohexane evaporated while the freezing point of pure cyclohexane was being measured. ( i think it would be higher) b)Some cyclohexane evaporated

    asked on January 29, 2013
  20. College Chemistry (Hard)

    The easiest fusion reaction to initiate is 1-1H + 1-1H------> 4-2He + 1-0 n The 1-1 indicates a small one above the other on the left side of the symbol of the element.So for 1-0n is a one above a zero on the left side of n (neutron). The number on the top

    asked on April 5, 2010
  21. physics

    A small light source located 1 m in front of a 1 m^2 opening illuminates a wall behind. If the wall is 1 m behind the opening (2 m from the light source), the illuminated area covers 4 m^2. How many square meters will be illuminated if the wall is 3 m from

    asked on March 6, 2012
  22. physics

    A stone with a mass of 1.0 kg is tied to the end of a light string which keeps it moving in a circle with a constant speed of 4.0 m/s on a perfectly smooth horizontal tabletop. The radius of the path is 0.60 m. How much work does the tension in the string

    asked on November 12, 2017
  23. Physics

    Pulling the string on a bow back with a force of 28.7lbs, an archer prepares to shoot an arrow. If the archer pulls in the center of the string, and the angle between the two halves is 138 degrees, what is the tension in the string?

    asked on March 8, 2010
  24. Math: Please check

    A playground is shaped like a rectangle with a width 5 times its length (L). What is a simplified expression for the distance between opposite corners of the playground? A.) L square root 26 B.) 5L C.) 26L^2 D.) 6L Thanks

    asked on March 14, 2013
  25. English

    Combine these two simple sentences into a complex sentence. Many industrialized nations use the metric system. The United States refuses to adopt it. A. Although many industrialized nations use the metric system, the United States refuses to adopt it. B.

    asked on November 22, 2015
  26. AP Calculus

    A rectangle is inscribed between the parabolas y=4x^2 and y=30-x^2. what is the maximum area of such a rectangle? a)20root2 b)40 c)30root2 d)50 e)40root2

    asked on December 14, 2010
  27. Matht

    Translate this sentence into an equation. The product of 7 and diego'so savings is 112. Use d to represent diego'so savings

    asked on May 23, 2017
  28. math

    A manufacture has been selling 1300 television sets a week at 450 each. A market survey indicates that for each 14 rebate offered to a buyer, the number of sets sold will increase by 140 per week. a) Find the demand function , where is the number of the

    asked on October 9, 2011
  29. Probability and Statistics

    According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. You randomly select peanut M&M’s from an extra-large bag looking for an orange

    asked on December 6, 2017
  30. physics

    As shown below, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the minimum value of v such that

    asked on March 22, 2009
  31. Math: Please check

    What is the simplified form of square root 48n^9? I think the answer is: 3n square root 4n^8. Thank You

    asked on March 12, 2013
  32. chemistry

    Arrange the following compounds in order of increasing viscosity: Propanol, CH3CH2CH2OH; Propanediol, CH3CH(OH)CH2OH; Propanetriol , HOCH@CH(OH)CH2OH

    asked on June 23, 2010
  33. ENGLISH 11

    Richard Bone by Edgar Lee Masters: When I first came to Spoon River I did not know whether what they told me Was true or false. They would bring me an epitaph And stand around the shop while I worked And say "He was so kind," "He was wonderful," "She was

    asked on March 5, 2012
  34. physics

    Rank the microtidal forces on your own body, from greatest to least, produced by the:A. JupiterB. PlutoC. Earth greatest to least.

    asked on March 6, 2012
  35. math

    a parking lot charges $1.50 for the first hour of parking and 55 cents for each additional half hour how much would it cost to park a car from 12:45pm to 6:15 pm

    asked on May 13, 2014
  36. physics

    Imagine a Rip van Winkle type who lives in the mountains. Just before going to sleep, he yells, "WAKE UP", and the sound echoes off the nearest mountain and returns 7.6 hours later.Find the distance between Rip and the imaginary mountain.

    asked on April 29, 2012
  37. Physics- PLEASE!!

    A U-shaped tube is filled mostly with water, but some vegetable oil has been added to both sides of the U tube. On the right side of the tube, the depth of oil is 5.00 cm . On the left side of the tube, the depth of the oil is 2.30 cm. The density of the

    asked on December 4, 2009
  38. Math

    1) Find the surface area of a sphere with a radius of 8 cm. A 267.9 cm B 803.8 cm C 2143.6 cm D 2010. cm 2) Find the surface area of a sphere with a radius of 4 ft. A 452.2 m B 150.7 m C 113.0 m D 904.3 m 3) Find the volume of a sphere with a radius of 4

    asked on January 24, 2019
  39. Chemistry

    At 573 K, gaseous NO2(g) decomposes, forming NO(g) and O2(g). If a vessel containing NO2(g) has an initial concentration of 1.9 × 10−2 mol/L, how long will it take for 75% of the NO2(g) to decompose? The decomposition of NO2(g) is second-order in the

    asked on September 23, 2015
  40. physics

    On a perfect fall day, you are hovering at low altitude in a hot-air balloon, accelerated neither upward nor downward. The total weight of the balloon, including its load and the hot air in it, is 24000 N. Find the weight of the displaced air. Find the

    asked on March 29, 2012
  41. English: Please help

    18. What is one disadvantage of accessing the Internet through a public search engine such as or ? A.) It’s open to anyone, so the information comes from many different people. B.) You won’t be able to access documents that have not been published

    asked on February 28, 2013
  42. math

    a local television station sends out questionnaires to determine if viewers would rather see a documentary, an interview show or reruns of a game show there were 350 responses with following results. 105 were interested in an interview show and a

    asked on April 27, 2011
  43. College Chemistry

    a solution contains .25M Ni(NO3)2 and .25 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3?Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and assume no

    asked on March 12, 2010
  44. isosceles triangle

    An isosceles triangle is a triangle that has two equal sides. Find AB, BC and AC. Determine if the triangle is isoseles or not based on the lengths of the three sides. can someone show me how to solve?please The triangle is isosceles if AB = BC, or BC =

    asked on July 26, 2007
  45. math

    It takes a florist 3h 15min to make 3 small centerpieces and 3 large cebterpieces. It takes 6h 20min to make 4 small centerpieces abd 7 large centerpieces. How long does it take to make each small centerpiece and each large centerpiece? Write and solve a

    asked on May 24, 2013
  46. Chemistry

    I have worked this problem out a number of ways, but every answer I come up with is incorrect. I have posted my last answers underneath the question. Please advise. (a) What is the mass percentage of iodine (I2) in a solution containing 0.060 mol I2 in 105

    asked on September 13, 2007
  47. AP Calculus

    2) Given the table below for selected values of f(x), use 6 trapezoids to estimate the value of (10)∫(1) f(x)dx x 1 3 4 6 7 9 10 f(x) 4 8 6 10 10 12 16

    asked on June 20, 2018
  48. physics

    the mass of a brick is 2.5 kg. its dimensions are 10cmx5cmx2cm. find the pressure of the brick exerts on the ground if it is resting on a. 10cmx5cm base and b. 5cmx2cm base

    asked on August 20, 2013
  49. chemistry

    The normal boiling point of acetone is 56.2 (degrees)C and the molar heat of vaporization is 32.0 kj/mol. At what temperature will acetone boil under a pressure of 50.0 mmHg?

    asked on June 21, 2010
  50. physics

    Rank the beat frequency from highest to lowest for the following pairs of sounds:a. 876 Hz, 871 Hz b. 786 Hz, 784 Hz c. 721 Hz, 728 Hz d. 542 Hz, 541 Hz

    asked on April 29, 2012
  51. chemistry

    Calulate the wavelengths (in nm) of the visible lines in the line spectrum of hydrogen using the Rydberg equation (nf = 2; ni = 3, 4, 5, and 6).

    asked on November 10, 2009
  52. physics

    What beat frequencies are possible with tuning forks of frequencies 258, 263, and 267 Hz?

    asked on April 29, 2012
  53. Physics

    As the time required to run up the stairs increases, the power developed by that person Increases, decreases, or remains the same. Is the answer decreases?

    asked on October 22, 2009
  54. physics

    This question is typical on some driver's license exams: A car moving at 50km/hr skids 15m with locked brakes.How far will the car skid with locked brakes at 120 km/h?

    asked on February 27, 2012
  55. pre calc

    The minute hand of a clock is 7 inches long. How far does the tip move in 16 minutes? a.56/15pi b.8/105pi c.4/105pi d.28/15pi

    asked on January 2, 2012
  56. Composite Materials

    Can someone please help with this problem? A burnout test was performed to determine the volume fractions of constituents in a glass/epoxy composite. The following observations were made: Weight of empty crucible = 47.6504 g Weight of the crucible and

    asked on February 26, 2009
  57. calculus

    A rectangle has its base on the x-axis and its upper two vertices on the parabola y=12−x2 . What is the largest area that the rectangle can have

    asked on May 19, 2009
  58. Chemistry

    Complete and balance the following equation S(s)+HNO3(aq)--->H2SO3(aq)+N2O(g) An explanation would be excellent, thanks in advance.

    asked on April 14, 2012
  59. English

    Identify the INCORRECT sentence. A. Amanda worked diligently on her algebra homework. B. Trudy bought a American-made car. C. My sister angrily slammed the door. D. You should concentrate closely on whatever you write. D

    asked on October 15, 2015
  60. physics

    A package is dropped from a helicopter that is descending steadily at a speed v0. After t seconds have elapsed, consider the following. (a) What is the speed of the package in terms of v0, g, and t? (Use any variable or symbol stated above as necessary.

    asked on September 17, 2011
  61. physics

    A ball has a diameter of 3.86 cm and average density of 0.0836 g/cm3. What force is required to hold it completely submerged under water?

    asked on November 21, 2011
  62. college

    Assume you are performing the calibration step of Experiment 8 and you begin with 80 g of water at 20 oC and 80 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment,

    asked on October 28, 2009
  63. Chem

    A mixture of chromium and zinc weighing .362 g was reacted with an excess of hydrochloric acid. After all the metals in the mixture reacted 225 mL of dry hydrogen gas was collected at 27 C and 750 torr. Determine the mass percent Zn in the metal sample.

    asked on February 25, 2007
  64. physics

    A 370kg piano slides 2.9m down a 24∘ incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Ignore friction.

    asked on June 9, 2014
  65. Physics help please!

    Light waves with two different wavelengths, 632 nm and 474 nm, pass simultaneously through a single slit whose width is 7.63 x 10-5 m and strike a screen 1.30 m from the slit. Two diffraction patterns are formed on the screen. What is the distance (in cm)

    asked on March 30, 2012
  66. Physics

    A rigid tank having a volume of 0.100 m3 contains helium gas at 150 atm. How many balloons can be inflated by opening the valve at the top of the tank? Each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.30 atm.

    asked on October 4, 2011
  67. Physics

    A 50.0-kg person takes a nap in a backyard hammock. Both ropes supporting the hammock are at an angle of 15.0degrees above the horizontal. Find the tention of the ropes.

    asked on March 8, 2010
  68. chemistry

    If you are given a 0.32 g piece of sodium metal to react with water, how many moles of HCl would it take to neutralize the sodium hydroxide produced?

    asked on November 17, 2009
  69. Math

    4. Landon is standing in a hole that is 6.5 ft deep. He throws a rock, and it goes up into the air, out of the hole, and then lands on the ground above. The path of the rock can be modeled by the equation y = 0.005x² + 0.45x – 6.5, where x is the

    asked on March 11, 2013
  70. English

    Which is __________ to write, a letter or an essay? A. most easiest B. more easy C. easiest D. easier

    asked on October 15, 2015
  71. Word problems

    Jennifer serves the volleyball to Debra with an upward velocity of 10.5ft/s. The ball is 5 feet above the ground when she strikes it. How long does Debra have to react, before the volleyball hits the ground? Round your answer to two decimal places.

    asked on October 6, 2015
  72. physics

    If you drop a piece of ice on a hard surface, the energy of impact will melt some of the ice. The higher it drops, the more ice will melt upon impact.Find the height from which a block of ice should ideally be dropped to completely melt it that falls

    asked on April 3, 2012
  73. chemistry

    A solution is prepared by dissolving 23.7g of CaCl2 in 375.0g of water. The density of this solution is 1.05g/mL. determine the concentration (molarity) of Cl in solution.

    asked on March 14, 2011
  74. physics

    in a daring rescue by helicopter, two men with a combined mass of 172 kg are lifted to safety. a)If the helicopter lifts the menstraight up with constant acceleration, is the tension in the rescue cablegreater than, less than, or equalto the combined

    asked on March 8, 2010
  75. english

    Describe the narrow escape of the men aboard the Nautilus.

    asked on December 11, 2018
  76. Chemistry

    How many seconds does it take to deposit 81.5 g of Zn on a steel gate when 21.0 A is passed through a ZnSO4 solution?

    asked on May 21, 2015


    asked on January 2, 2009
  78. science

    on the windward side of the mountain, should the relative humidity of the parcel change as it rises from 3000 feet to 6000 feet? Why?

    asked on November 6, 2013
  79. Physics

    A 3.0 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 1.0 kg of water is raised

    asked on April 2, 2008
  80. Probability and Statistics

    If a seed is planted, it has a 95% chance of growing into a healthy plant. If 6 seeds are planted, what is the probability that exactly 4 don't grow?

    asked on December 6, 2017
  81. ss

    How did Muslim Turks influence Turkey's development? Do not copy and paste anything, its not helpful.

    asked on December 12, 2016
  82. Financing

    quick ratio that is much smaller than the current ratio reflects A. a small portion of current assets is in inventory. B. that the firm will have a high inventory turnover. C. that the firm will have a high return on assets. D. a large portion of current

    asked on October 18, 2009
  83. Probability and Statistics

    A high school baseball player has a 0.193 batting average. In one game, he gets 7 at bats. What is the probability he will get at least 2 hits in the game?

    asked on December 6, 2017
  84. Chemistry

    Which product is formed by beta emission from phosphorus -32? The atomic number of phosphorus is 15. A)28 Al 13 B)30 Al 13 C)32 S 16 D)32 P 15 E)33 P 15

    asked on April 28, 2010
  85. Algebra

    A cab charges $1.75 for the first mile and $0.25 for each additional mile. Write and solve an inequality to determine how many miles Eddie can travel if he has $15 to spend

    asked on September 25, 2013
  86. chemistry

    Assume you are performing the calibration step of Experiment 8 and you begin with 80 g of water at 20 oC and 80 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment,

    asked on October 28, 2009
  87. chemistry

    which probably has the lowest boiling point at 1.0 atm pressure. A) C6H14 B) C3H8 C) C4H10 D) C5H12 E) C2H6

    asked on June 21, 2010
  88. algebra

    A furniture maker uses the specification 19.88

    asked on February 24, 2014
  89. physics

    What is the final tempurature when a 3.0 kg gold bar at 99C is dropped into 0.22 kg of water at 25C Specific heat of gold is 129 j/kg x C

    asked on January 14, 2011
  90. Grad Economic

    If the real money demand is greater than the real money supply, interest rates must rise to reach equilibrium in the money market as institutions sell bonds to obtain more money.

    asked on June 11, 2015
  91. Math

    There are 14 children in little league baseball team. Only 9 can play at a time. The baseball season has 42 games. The coach decided that each of the 14 children would play in the same number of complete games.In how many complete games will Howard, one of

    asked on January 4, 2016
  92. Physics

    Two straight and parallel wires of length 1.0 m carry a current - the first carries a currecnt of 9.0 A while the other wire carries a current of 4.0 A. What distance must separate the two straight and parallel copper wires if the force between them is to

    asked on December 8, 2010
  93. Physics help please

    Twins who are 19.0 years of age leave the earth and travel to a distant planet 12.0 light-years away. Assume that the planet and earth are at rest with respect to each other. The twins depart at the same time on different spaceships. One twin travels at a

    asked on April 6, 2012
  94. Physics check

    A person has a reasonable chance of surviving an automobile crash if the deceleration is no more than 30 "g's" (recall that g = 9.8 m/s2). Calculate the force, in N, on a 68 kg person accelerating at this rate. 30"g" x 9.8 294 ms^2 f=ma 294x68 =19,992N

    asked on October 8, 2009
  95. Statistics

    The following is a histogram (right skewed) of the first ten terms of a geometric distribution with p = .4. The mean of this distribution is 2.5 and the standard deviation is approximately 1.93. What's the shape of the distribution of sample means for

    asked on February 18, 2016
  96. Physics

    A point charge +6.7 uC is placed at the origin, and a second charge –3.6 uC is placed in the X - Y plane at (0.40 m , 0.55 m ). Where should a third charge be placed in the plane so that the net force acting on it is zero?

    asked on January 11, 2013
  97. health

    The main purpose of a peer review committee is to A. collect and prepare information to be submitted to the NPDB. B. establish procedures for confidentiality of incident reports. C. identify activities that suggest guidelines aren't being followed. D.

    asked on May 31, 2011
  98. Chemistry

    One of the concerns about the use of Freons is that they will migrate to the upper atmosphere, where chlorine atoms can be generated by the following reaction: CCl2F2 --> CF2Cl + Cl Chlorine atoms can act as a catalyst for the destruction of ozone. The

    asked on October 26, 2010
  99. spanish

    1.Tienes la maleta? No, no (lo/la) tengo. 2. Mi tio tiene las maletas en su coche. Va a facturar (los/las) en el aeropuerto. 3. Quien tiene el itinerario? Rosabla (lo/la) tiene. 4. No tengo los pasaportes. Manuel (las/los) tiene.

    asked on October 13, 2010
  100. Math

    Solve for the length of the unknown side in the following right triangle. (Side AC is the hypotenuse.) Round your answer to two places, where applicable. Side AB ? Side BC=12 Side AC=19

    asked on July 18, 2012


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