Popular questions and responses by Tom
  1. 3rd grader needs help with grammar

    Is it..... my Classmates and me or my classmates and I

    asked on May 6, 2009
  2. chemistry

    If the density of a certain alcohol is 0.785 g/mL, what volume of the alcohol would have a mass of 75.0g?

    asked on September 2, 2011
  3. physics

    At the equator, the earth’s field is essentially horizontal; near the north pole, it is nearly vertical. In between, the angle varies. As you move farther north, the dip angle, the angle of the earth’s field below horizontal, steadily increases. Green

    asked on April 14, 2011
  4. Physics

    In a classroom demonstration, a 79.2-kg physics professor lies on a “bed of nails.” The bed consists of a large number of evenly spaced, relatively sharp nails mounted in a board so that the points extend vertically outward from the board. While the

    asked on June 5, 2012
  5. Physics

    A model rocket has a mass of 0.435 kg. It is mounted vertically and launches directly up with a thrust force of 13.1 N. a) What is the weight of the rocket? b) Determine the net force on the rocket as it is launched. c) What is the acceleration of the

    asked on December 15, 2016
  6. art

    Modernism focused on the distinction between “high” and “low” culture in fine art. Which of the following reacted against this distinction by incorporating images from “lowbrow” culture into works of fine art? a)Minimalism b)Pop Art c)Site

    asked on September 21, 2018
  7. Calculus

    Hi, just wanted to verify my work please. Determine if the sequence {(n+1)^2/n^2+1} is increasing or decreasing and find it's lower and/or it's upper bound. First I have n>n+1, therefore it's decreasing. Then, if I do the limit n->inf, I get = 1, so 1 will

    asked on July 8, 2020
  8. Calculus

    Hi, I can't figure this one out: Here are the first 5 terms of a sequence {5/3, 7/8, 9/15, 11/24, 13/35....} a) Find the general term. So far I got the top part of the fraction as (2n+3), but I can't figure out how to get the bottom one. I see a pattern

    asked on July 8, 2020
  9. Calculus

    Hello, I can't figure out this last number of series, convergence/divergence tests. E inf, n=1 (5n)^(3n) / (5^n +3)^n I tried ratio test but it's inconclusive. Polynomial doesn't work either, because of the exponents. Thanks

    asked on July 11, 2020
  10. calculus

    An observer is 20 m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 20 m horizontally from the observer (see figure). The angle of elevation of the elevator is the angle that the observer's line of sight

    asked on November 9, 2014
  11. statistics

    Forty-four percent of customers who visit a department store make a purchase. The probability, rounded to four decimal places, that in a random sample of 9 customers who will visit this department store, exactly 6 will make a purchase is:

    asked on October 27, 2013
  12. math

    find the value of k such that the equation e^(2x)=krootx has exactly one solution.

    asked on April 4, 2013
  13. Organic Chemistry

    The following reaction would produce a(n) __________. R-OH + R'COOH →

    asked on May 3, 2010
  14. statistics

    Based on data collected by the National Center for Health Statistics and made available to the public in the Sample Adult database, an estimate of the percentage of adults who have at some point in their life been told they have hypertension is 23.53

    asked on September 13, 2011
  15. Physics

    A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71¡ã W] and the second stone moves away at a velocity of 1.25 m/s [N44¡ã E], what was the

    asked on March 30, 2016
  16. Physics

    In an experiment conducted using the Young's double-slit apparatus, the separation between the slits is 20 µm. A first-order constructive interference fringe appears at an angle of 2.5o from the zeroth order (central) fringe. A. What wavelength of light

    asked on October 25, 2017
  17. Math

    For the geometric series, S4/S8 = 1/17. Determine the first three terms of the series if the first term is 3.

    asked on January 4, 2014
  18. Statistics

    Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x))

    asked on May 26, 2013
  19. Physics

    The boom of a crane is 20 m long and is inclined 20ᵒ from the horizontal. A bucket of cement with a mass of 3000 kg is suspended from the upper end of the boom. What is the torque acting on the point where the boom is attached to the crane? A. 5.5 x 105

    asked on November 13, 2012
  20. Physics HELP!

    The position of an object connected to a spring varies with time according to the expression x = (7.1 cm) sin (2.1π t). Find (a) the period of this motion (b) the frequency of the motion (c) the amplitude of the motion (d) the first time after t=0 that

    asked on November 19, 2012
  21. Math

    The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of −0.6 Suppose that the height of the candle after 19 hours is 9.6 centimeters. What

    asked on September 8, 2015
  22. Chemistry

    The piperazine content of an impure commercial material can be determined by precipitating and weighing the diacetate: (C2H4)2N2H2 + 2 CH3COOH → (C2H4)2N2H2(CH3COOH)2 In one experiment, 0.3126 gram of the sample was dissolved in 25 mL of acetone, and 1

    asked on August 23, 2014
  23. Physics

    A box of mass 1.50 kg is given an initial velocity of 12.5 m/s up an inclined ramp that makes an angle of 25.0o with the ground, which is horizontal. The coefficient of kinetic friction between the box and the ramp is 0.240. How long does the box slide up

    asked on May 13, 2014
  24. physics

    A sample of ideal gas is expanded to twice its original volume of 1.00 m3 in a quasi-static process for which P = áV2, with á = 2.50 atm/m6, as shown in the figure. How much work is done by the expanding gas? i tried using the eq:

    asked on October 15, 2008
  25. Chemistry

    Benadryl is an over-the-counter drug used to treat allergy symptoms. The formula of benadryl is C17H21NO. How many moles of C are present in 0.759 mole of benadryl?

    asked on November 27, 2015
  26. Stats

    A manufacturer wants to increase the absorption capacity of a sponge. Based on past data, the average sponge could absorb 3.5 ounces. After the redesign, the absorption amounts of a sample of sponges were (in ounces): 4.1, 3.7, 3.3, 3.5, 3.8, 3.9, 3.6,

    asked on April 29, 2012
  27. Math

    A ferris wheel has a radius of 20m and the bottom is 2m above the ground. The wheel makes one rev in 40 sec. If the rider gets on at 30^0 on the left of the lowest point going downwards, wirte the sine function to show this movement

    asked on December 21, 2017
  28. computer code

    Design a pseudocode for a program that accepts an ice cream flavor the price per gallon and number of gallons sold a year, display a message this flavor is the best seller having more than 40000 gallons a year sold

    asked on September 15, 2017
  29. physics

    A trained dolphin leaps from the water with an initial speed of 12 m/s. It jumps directly towards a ball held by the trainer a horizontal distance of 5.50 m away and a vertical distance of 4.10 m above the water. In the absence of gravity the dolphin would

    asked on May 20, 2012
  30. math

    Does the series converge or diverge? If it converges, what is the sum? Show your work. ∑∞n=1−4(−12)n−1

    asked on May 2, 2019
  31. AP Calculus

    Find the particular solution to y ' = 2sin(x) given the general solution is y = C - 2cos(x) and the initial condition y(pi/2) = 1

    asked on March 26, 2018
  32. physics

    The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0 degrees above the horizontal, some of the tiny critters have reached a maximum height of 58.7 cm above the level ground. (See Nature, Vol. 424,

    asked on February 8, 2016
  33. Calculus

    For f(x)=(1-x)/(1+x) and g(x)=x/(1-x) , find the simplified form for f [g(x)] and state the domain

    asked on May 27, 2015
  34. statistics

    Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x))

    asked on May 26, 2013
  35. chemistry question

    Classify each of the follwing by the type of solid(molecular, ionic, metallic, covalent network)it will form: a) Na b) Fe c) SiO2 d) H2O E) KF The result that I got are : a) Na (ionic solid) b) Fe (metalic solid) c) SiO2 (covalent network) d) H2O covalent

    asked on June 11, 2007
  36. AP Calculus Help Five Questions

    1. Find the particular solution to y " = 2sin(x) given the general solution y = -2sin(x) + Ax + B and the initial conditions y(pi/2) = 0 and y'(pi/2) = -2. 2. What function is a solution to the differential equation y ' - y = 0? 3. If dy/dx = cos^2(pi*y/4)

    asked on March 27, 2018
  37. Calculus

    The table below shows the temperature (in °F) t hours after midnight in Phoenix on March 15. The table shows values of this function recorded every two hours. (10 points) a. Estimate the value of T'(6). Give units in your answer. b. What is the meaning of

    asked on May 15, 2015
  38. Physics

    How many joules of energy per kilogram of rest mass are needed to bring a spacecraft from rest to a speed of 0.77c?

    asked on September 14, 2014
  39. Physics

    a horizontal force of magnitude 20.0 N is applied to a 3.05 kg book as the book slides a distance d = 0.87 m up a frictionless ramp at angle θ = 30°. The book begins with zero kinetic energy. What is its speed at the end of the displacement?

    asked on March 2, 2014
  40. Math

    The first two terms in a geometric series is 12. The sum of the first three terms of the same series is 62. Determine the first four terms of the series.

    asked on January 8, 2014
  41. college physics

    A 0.384 kg puck, initially at rest on a horizon- tal, frictionless surface, is struck by a 0.189 kg puck moving initially along the x axis with a speed of 2.7 m/s. After the collision, the 0.189 kg puck has a speed of 1.7 m/s at an angle of 28 to the

    asked on October 22, 2011
  42. Algebra

    The ratio of the length to the width of a golden rectangle is (1 + √(5):2:.The dimensions of a garden form a golden rectangle. The width of the garden is 12 feet. Find the length L of the garden. Round your answer to the nearest foot.

    asked on May 24, 2018
  43. Algebra

    Write an absolute value inequality to fit the graph below: There is a Number line with 14 on the left and 26 on the right with solid dots on both.

    asked on June 1, 2017
  44. art

    this image was created by using basic math concepts that include all of the following except A)knowing how to create a pattern B)using understanding the angles of the shapes C) a basic understanding of different geometric shapes. D) applying appropriate

    asked on October 5, 2016
  45. physics

    Muscles are attached to bones by means of tendons. The maximum force that a muscle can exert is directly proportional to its cross-sectional area A at the widest point. We can express this relationship mathematically as F~max= σA, where σ (sigma) is a

    asked on March 6, 2016
  46. physics

    A small cylinder rests on a circular turntable that is rotating clockwise at a constant speed. The cylinder is at a distance of r = 12 cm from the center of the turntable. The coefficient of static friction between the bottom of the cylinder and the

    asked on July 10, 2013
  47. math

    The exchange rate of U.S. dollars to British pound's is .63 you have $4000 to convert to British pounds. How many British pounds will you receive?

    asked on May 27, 2012
  48. physics

    A mass m at the end of a spring vibrates with a frequency of 0.87 Hz. When an additional 602 g mass is added to m, the frequency is 0.59 Hz. What is the value of m?

    asked on March 7, 2012
  49. chem 2

    What is the pH of a solution that consists of 0.50M H2C6H6O6(ascorbic acid) and 0.75M NaHC6H6O6(sodium ascorbate)? for ascorbic acid, Ka=6.8x10-5

    asked on March 3, 2012
  50. statistic

    The average score on a standardized test is 750 points with a standard deviation of 50 points. If 2,000 students take the test at a local school, how many students do you expect to score between 700 and 800 points?

    asked on July 21, 2011
  51. world history

    How did the Renaissance contribute to the Age of Exploration? by emphasizing the importance of converting people to Christianity by awakening a spirit of discovery and innovation in Europe by fostering a belief in the importance of working as a group by

    asked on February 21, 2011
  52. chemistry

    A 0.821 sample of a substance composed of diatomic molecules has a mass of 131.3g. Identify this molecule. May I have your expert help with this question? Thank you.

    asked on April 22, 2010
  53. statistics

    A statistics practitioner would like to estimate a population mean to within 50 units with 99% confidence given that the population standard deviation is 250. a) What sample size should be used. b) Repeat part (a) with a standard deviation of 50. c) Repeat

    asked on March 13, 2010
  54. pre-calculus

    Graph each complex number. Then express it in rectangular form. 2(cos(4pi/3) + isin(4pi/3)) I don't understand where to go from here.

    asked on March 9, 2010
  55. Accounting

    North Pole Cruise Lines issued preferred stock many years ago. It carries a fixed dividend of $6 per share. With the passage of time, yields have soared from the original 6 percent to 14 percent (yield is the same as required rate of return). A. What was

    asked on January 10, 2010
  56. what is the difference

    what is the difference between 14kt gold and 14k gold and what one is the better gold Both are the same thing Thank you for using the Jiskha Homework Help Forum. In addition to the answer you already have, look what might happen if you don't distinguish

    asked on February 26, 2007
  57. physics

    Two small loudspeakers emit sound waves of the same amplitude and frequency in phase with each other. The waves produce an interference pattern such that the distance from the right bisector to a point P on the third nodal line is x3. The wavelength of the

    asked on January 7, 2018
  58. Intro Physics - Newton's third rule

    a piano mover raises a 1000 N piano at a constant speed using a very light rope in a frictionless pulley system. with what force is the mover pulling down on the rope? Show steps please! Thank you!

    asked on October 7, 2014
  59. Chemistry

    A 8.5 L sample is collected at 45 degrees C. What will the volume be if the temperature is raised to 70 degrees C.

    asked on August 19, 2014
  60. calculus help

    Does the function satisfy the hypotheses of the Mean Value Theorem on the given interval? f(x)= ln(x) , [1,6] If it satisfies the hypotheses, find all numbers c that satisfy the conclusion of the Mean Value Theorem. (Enter your answers as a comma-separated

    asked on April 16, 2014
  61. physics

    In the apparatus shown in the figure (Figure 1) , m1 = 10kg and the coefficients of static and kinetic friction between m1 and the table are 0.69 and 0.32, respectively. Part A What mass of m2 will just barely set the system in motion?

    asked on October 3, 2013
  62. Physics

    What is the maximum theoretical efficiency of a steam engine operating between 60°C and 410°C?

    asked on June 27, 2012
  63. Algebra 2

    Abelardo wants to create several different 7-character screen names. He wants to use arrangements of the first 3 letters of his first name(abe, followed by arrangements of 4 digits in 1984, the year of his birth. How many different screen names can he

    asked on April 16, 2012
  64. chemistry

    . Given the following stocks 4M NaCl, 3M NaOH, 5M HCl (a) Prepare 200ml of a solution containing 0.5M NaCl and 0.1M (b) Prepare 300ml of a solution containing 0.5M NaCl (c) Prepare 200ml of a solution containing 0.5M NaCl and 0.1M HCl

    asked on April 15, 2011
  65. physics

    In the ideal apparatus m1=2.0 kg. What is m2 if both masses are at rest? How about if both masses are moving at constant velocity?

    asked on November 2, 2009
  66. physics

    The mass of the Earth is 5.98x10^24 kg, and the mass of the Moon is 7.36x 10^22 kg. The distance of separation, measured between their centers, is 3.84x10^8 m. Locate the center of mass of the Earth-Moon system as measured from the center of the Earth. I

    asked on October 3, 2008
  67. Interpersonal Communication in Criminal Justice

    The Escobedo and Miranda Laws are landmark court decisions that impact the manner in which law enforcement int Question Details: What is the relationship between the two? What was the impact of both decisions in terms of interviews and interrogations of a

    asked on March 13, 2008
  68. physics

    Consider the system shown, Block A weighs 45N and block b weighs 25N. Once block b is set into downward motion, it descends at a constant speed. Its an atwood machine with A resting on a surface and B dangling off the surface. ____A____ | | B uk equals

    asked on April 6, 2020
  69. math

    You are given 5 to 4 odds against tossing three heads with three​ coins, meaning you win ​$5 if you succeed and you lose ​$4 if you fail. Find the expected value​ (to you) of the game. Would you expect to win or lose money in 1​ game? In 100​

    asked on December 11, 2019
  70. physics

    Two slits are 0.158 mm apart. A mixture of red light ( wavelength = 65 nm) and yellow green light (wavelength = 565 nm)falls on the slits. A flat observation screen is located 2.24 m away. What's the distance on the screen between the third order red

    asked on January 7, 2018
  71. Computer Science

    Write a program that Will prompt a user to enter his/her name and number.use a while loop that will display the user name times the entered number

    asked on October 27, 2016
  72. PHYSICS!!!!

    It is 5.0 km from your home to the Physics lab and your car is out of gas. You could run that distance at 10 km/h, which uses up energy at the rate of 700 W; or you could walk it leisurely at 3.0 km/h, which uses energy at 300 W. (a) Calculate how much

    asked on April 4, 2016
  73. Calculus

    The function's value will always be greater than or equal to the local linear approximation of a function f if, for all x in an interval containing the point of tangency, f " > 0 f " < 0 f ' > 0 f ' < 0

    asked on May 20, 2015
  74. Physics

    A crowbar is 4.000 metres long and has its pivot 50.000 centimetres from one end. A force of 2000.000 newtons is applied to the end closest to the pivot. What effort must be applied to the other end of the crowbar to keep it in equilibrium? (Round to 3

    asked on November 1, 2013
  75. calculus

    Using an upper-case "C" for any arbitrary constants, find the general indefinite integral ∫ (-2-t)(-9-t^2) dt Now I multiplied both parentheses to get: ∫ (18 + 2t^2 + 9t + t^3) dt now I integrated and got: 18t + 2t^3/3 + 9t^2/2 + t^4/4 + C but I'm told

    asked on February 2, 2013
  76. Physics

    Suppose you have a very long straw that can reach from a cup of water on the ground level to the top of a very tall building. When you use a pump to suck on the straw in order to bring water up, a. you can bring the water up to any height with no problem.

    asked on January 18, 2013
  77. Chemistry

    What is the trend in atomic size in the series of Group IIA elements Be through Ra?

    asked on November 14, 2011
  78. statistics

    The average score on a standardized test is 500 points with a standard deviation of 50 points. What is the probability that a student scores between 450 and 600 on the standardized test?

    asked on July 21, 2011
  79. geometry

    The diagonals of rhombus FGHJ intersect at point K. If side GH is equal to 3x - 10 and side JH is equal to 6x - 19, find x.

    asked on July 14, 2011
  80. Social Studies

    What was the purpose of Hammurabi's Code

    asked on December 13, 2009
  81. physics

    Is it possible to calculate the torque acting on a rigid body without specifying the origin?

    asked on October 9, 2009
  82. spelling

    how do you make a spelling triangle

    asked on August 31, 2011
  83. psychology

    what is an example of the relationship between sensory adaption and negative adaption?

    asked on February 8, 2009
  84. psychology

    Can someone please give me an example how sense and perception and behavior are link together I am not sure if I am understanding it to good So If I am wrong please let me know. I believe they are link in how we see things is not always how are mind

    asked on September 5, 2008
  85. psychology

    What is neurological psychological theory? How did neurological psychological theory get established? I am doing a paperand can not find anything to explain this to me am i searching the wrong thing can some please help I need information to write this

    asked on August 14, 2008
  86. psychology

    I would like the entire class to identify the major similarities and differences that exists between the American and European traditions of psychology. Please post a response to this message that includes at least two similarities and two differences. can

    asked on August 6, 2008
  87. math (transformations)

    point (-3, 8) is on the graph y=f(x) find the new point on: y = f(x - 2) -3

    asked on July 4, 2008
  88. biology

    diploid cell consists of 10 chromosomes. Find out the number of different combination of chromosomes when the above cell undergoes meiosis. a 64 b 32 c 4 d 8 e 16

    asked on November 12, 2019
  89. Science

    You need to make a 150mM solution of NaCl (MW = 58). How much NaCl do you need to make 1L (in moles and in grams)? If you b need to make 250mL how much NaCl would you need in grams?

    asked on September 19, 2018
  90. History

    what made the 1920's roaring

    asked on May 6, 2018
  91. math

    (4x^4 - 4x^2 + 6x) / (x-4) show how youd divide this using synthetic divison

    asked on March 14, 2018
  92. Stats

    In the game Roulette, a ball spins on a circular wheel that is divided into 38 arcs of equal lenght, numbered 00, 0, 1, 2, ... , 35, 36. The number on the arc on which the ball stops is the outcome of one play of the game. The numbers are also colored as

    asked on July 13, 2017
  93. English

    A similie , metaphor (etc) for relief??

    asked on March 31, 2017
  94. chemistry

    Suppose a balloon is filled so that its volume is 2.00 L when the pressure is 1.10 atm and the temperature is 300k. What volume will it occupy if it rises to an elevation where the pressure is 418mm Hg and the temperature is 200k?

    asked on March 20, 2017
  95. Algebra

    A plane can fly 500 miles against the wind in the same amount of time that it can fly 775 miles with the wind. If the wind speed is 55mph, find the speed of the plane in still air.

    asked on October 14, 2016
  96. Physics

    You are walking a dog when the dog sees a cat and runs away from you. You immediately run after the dog at 4.90 m/s. You jump at an angle of 30.0° to try and catch the dog. While you are in the air the dog is able to move an extra 1.72 m away from you. If

    asked on September 24, 2016
  97. computer science

    QUESTION 1 When using the OR logical operator to connect 2 conditions to create a complex Boolean expression, neither the first condition nor the second condition has to be true for the complex Boolean expression to be true. True False QUESTION 2 String

    asked on June 18, 2016
  98. Math

    What is the volume of a cereal box that is 2 inches thick, 12 inches high and 10 inches wide?

    asked on April 22, 2016
  99. Algebra

    Mrs. Rodrigues was selling two kinds of raffle tickets for $1.50 and $3.50. The number of $1.50 tickets sold was 5 more than three times the number of $3.50 tickets sold. She earned a total of $1,607.50. How many $1.50 tickets were sold?

    asked on February 17, 2016
  100. physics

    A biophysics student measures her reaction time by having a friend drop a meterstick between her fingers. The meterstick falls 0.300 meters before she catches it. (a) What is her reaction time? (b) Estimate the minimum average speed of nerve impulses going

    asked on January 25, 2016


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