Popular questions and responses by DAve
  1. math

    Fido weighs 26 pounds more than Fifi. Fifi weighs 12 pounds less than Rover. If the sum of their weights is 71, how much does Fifi weigh?

    asked on February 4, 2017
  2. General Chemistry

    A student dissolved 4.00 g of Co(NO3)2 in enough water to make 100. mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275. mL of a final solution. How many grams of NO3- ion are there in the final solution?

    asked on October 12, 2010
  3. Social Studies

    1. Which of the following apply to fascism? Select all that apply. A rooted in militarism B extreme nationalism C respect for minorities D blind loyalty to the state I think its A,B, and c ----------------------------------- 2. Which of the following best

    asked on February 26, 2017
  4. Social studies

    Which of the following factors was most responsible for an unequal distribution of wealth? A There was an increase in business profits. B Wages were not keeping pace with profits of business owners. C Wages were not keeping pace with profits of business

    asked on February 23, 2017
  5. Physics

    A dike in Holland springs a leak through a hole of area 0.80 cm2 at a depth of 1.2 m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak?

    asked on October 6, 2016
  6. Physics

    The initial kinetic energy imparted to a 0.1 kg bullet is 1036 J. The acceleration of gravity is 9.81 m/s2 . Neglecting air resistance, find the range of this projectile when it is fired at an angle such that the range equals the maximum height attained.

    asked on February 27, 2011
  7. physics

    A uniform pole 7m long and weighing 10kg is supported by a boy 2m from one end and a man 3m from the other end.At what point must a 20kg weight be attached so that the man would support thrice as much weight as the boy?

    asked on June 21, 2018
  8. physics help!!!

    In February 1955, a paratrooper fell 365 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 60 m/s (terminal speed), that his mass (including gear) was 90

    asked on March 26, 2010
  9. spanish

    Answer the questions negatively, using the imperfect tense. Make sure to include the direct object pronoun when needed. Follow the model. Modelo ¿Juega Daniel al fútbol? No, pero antes lo jugaba. ¿Hablas por teléfono? No hablaba ¿Fue a la playa

    asked on March 31, 2011
  10. statistics

    A random sample of size 36 is taken from a population with mean 50 and standard deviation 5. Find P( < 51.5).

    asked on July 6, 2012
  11. dynamics

    If end A of the rope moves downward with a speed if 5 m/s, determine the speed of cylinder b

    asked on February 3, 2012
  12. Trignometry

    Use the appropriate reciprocal identity to find the approximate value of sin θ for the given value of csc θ. Use a calculator. csc θ = 2.15750581

    asked on September 8, 2017
  13. chem

    A 6.75-g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 55.8 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?

    asked on March 14, 2013
  14. chem

    Determine the mass of oxygen in a 7.2-g sample of Al2(SO4)3

    asked on April 18, 2016
  15. Stats

    The probability that a person has blue eyes is 16%. Three unrelated people are selected at random. a. Find the probability that all three have blue eyes: b. Find the probability that none of the three have blue eyes c. Find the probability that one of the

    asked on April 30, 2013
  16. Chemistry

    Calculate the equilibrium constant for the following reaction at room temperature, 25 ∘C: N2(g)+O2(g)→2NO(g)

    asked on June 21, 2013
  17. SCIENCE 1

    The van der waals equation incorporates corrections to the ideal gas in order to account for the properties of real gases one of the correcctions accounts for A.attractions between molecules B.the quantum behavior of molecules C.that average kinetic energy

    asked on May 11, 2010
  18. physics/chem

    Calculate the number of coulombs of positive charge in 261 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton; an oxygen atom contains eight protons.)

    asked on March 31, 2008
  19. Math

    Find the 999th derivative of cos x. I got sin x.

    asked on October 20, 2016
  20. home economics

    list and explain 10 subject related to home economics

    asked on August 20, 2019
  21. Physics

    Consider the 690 N weight held by two cables. The left-hand cable had tension T2 and makes an angle of 41◦ with the ceiling. The right-hand cable had tension T1 and makes an angle of 42◦ with the ceiling.

    asked on December 8, 2014
  22. Prob and Stats

    The Roper Organization conducted identical surveys 5 years apart. One question asked of women was Are most men basically kind, gentle, and thoughtful? The earlier survey revealed that, of the 3,000 women surveyed, 2,010 said that they were. The later

    asked on September 5, 2011
  23. physics

    Identify the force that propels a rocket. 1)The rocket is propelled by the reaction force of the exhaust gasses bouncing off the air molecules outside the rocket. 2)The rocket is propelled because the action force of the rocket on the exhaust gases is

    asked on October 18, 2016
  24. chemistry

    The first ionization potential of the elements B, C, and N (atomic numbers 5, 6, and 7) steadily increases, but that of O is less than that of N. The best interpretation of the lower value for O is that: 1. the ionization potential of N is a maximum and

    asked on September 15, 2010
  25. "le Chat. Principle" #2

    Hi, there are 5 questions and I was wondering if you could check them for me. Thanks! 3. The hypothetical equilibrium reaction represented by the equation that follows. QA(s) + 2 X(g)>>>Q(l) + X2A(g) + energy This reaction can be shifted to increase the

    asked on July 19, 2006
  26. Chemistry

    Suppose you titrated a sample of sulfuric acid (diprotic acid) with a 0.250 M solution of NaOH. Given the data in the table below, what is the concentration of the sulfuric acid solution?

    asked on December 6, 2016
  27. Math

    a geometric progression has a third term of 20 and a sum to infinity which is three times the first term. find the first term

    asked on May 12, 2016
  28. physics

    A clear plastic tube with a diameter of 12cm and 110cm high is filled to the top with mercury. (density = 13.6 kg/m^3). There are three holes, all with a radius of 2 millimeters located 15cm from the bottom, 50cm from the bottom and 80cm from the bottom.

    asked on February 7, 2013
  29. spanish 4

    César le da consejos a un amigo en su primer día de trabajo porque el director de la cadena tiene muy mal humor. Escucha los consejos y cámbialos a mandatos. Sigue el modelo. Play audio For number 1 this is what the person says 1)el siempre pide que

    asked on February 23, 2011
  30. chemistry

    The electron in the n = 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?

    asked on September 3, 2010
  31. Physics

    You are driving down the highway late one night at 20 m/s when a deer steps onto the road 35 m in front of you. Your reaction time before stepping on the brakes is 0.50 s , and the maximum deceleration of your car is 10 m/s2 . How much distance is between

    asked on October 21, 2019
  32. physics

    Identify the force that propels a rocket. 1)The rocket is propelled by the reaction force of the exhaust gasses bouncing off the air molecules outside the rocket. 2)The rocket is propelled because the action force of the rocket on the exhaust gases is

    asked on October 18, 2016
  33. Physics

    A watertight car is submerged under water. What force is required to open a door of area 1.12 m2 if the average depth of water at the door is 1.50 m?

    asked on December 8, 2015
  34. Physics

    The force required to stretch a spring varies directly with the amount the spring is stretched. A force of 29 pounds is needed to stretch a spring 39 inches. How much force is required to stretch the spring 27 inches? Answer in units of lb

    asked on December 6, 2014
  35. Math

    A piece of aluminum with an unknown mass ios at 85c and is placed in a 2.00 liters of water at 25.0c. The final temperature becomes 33c. What is the mass of aluminum?

    asked on November 8, 2012
  36. calculus

    The population of a country was 8.4 million people in 2000. Three years later, the population of the same nation was 9.3 million people. Assuming that population is growing exponentially, what is the projected population (rounded to one-tenth of a million)

    asked on November 10, 2011
  37. chemistry

    From a 1M Tris solution, how is a 400ml of 0.2 M Tris prepared? I have no idea where to start

    asked on September 18, 2011
  38. Math/Statistics

    The mean starting salary for graduates in the spring of 2004 was $36,280. Assume that the distribution of starting salaries follows the normal distribution with a standard deviation of $3,300. What percent of the graduates have starting salaries between

    asked on November 29, 2010
  39. trig

    A Ferris wheel has a radius of 15 meters and takes 20 seconds to complete one full revolution. The seat you are riding in, takes 7 seconds to reach the top which is 35 meters above the ground. Write a sine or cosine equation for the height of your seat

    asked on July 26, 2010
  40. Physics

    A glass bottle full of mercury has a mass 500g. 35°C, 243g of mercury are expelled. Calculate the mass of f mercury remaining in the | bottle. (Cubic expansivity. of mercury . is 1.8×x10^-4 K^(-1), linear . expansivity .of glass is 8.0×10^(-4)k^(-1)

    asked on December 28, 2019
  41. Math

    "Cab companies often charge a flat fee for picking someone up and then charge an additional fee per mile driven. Pick a U.S. city and research the rates of two different cab companies in that city. Find companies that charge different amounts per mile and

    asked on November 13, 2017
  42. Physics

    A runner is jogging at a steady 3.9 km/hr. When the runner is 7.4 km from the finish line, a bird begins flying from the runner to the finish line at 19.5 km/hr (5 times as fast as the runner). When the bird reaches the finish line, it turns around and

    asked on September 1, 2017
  43. Social studies

    Which of the following was the main contributor to finally bringing the United States out of the Great Depression? A the National Recovery Administration B the Good Neighbor Policy C wartime spending D the election of Roosevelt D or B

    asked on March 8, 2017
  44. Social Studies

    Which action is often viewed as the most serious attempt to undermine the independence of the judiciary? A President Franklin D. Roosevelt’s plan to reorganize the Supreme Court B appointment of Supreme Court justices to unlimited terms of office C

    asked on February 23, 2017
  45. Social studies

    "The hijab has many images for Westerners, while its meaning differs for those wearing it. Explain at least three different reasons why it might be worn by a Middle Eastern woman today, and finally how freedom is defined differently by those who are

    asked on February 21, 2020
  46. math

    Consider the equation f(x)= -2 sqrt(X+3). List in order the transformations applied to the parent function.

    asked on October 9, 2015
  47. American History

    Which statement best describes the Monroe Doctrine? A. The United States welcomed European involvement in all issues in North America. B. The United States welcomed any European involvement in South America. C. The United States pledged to involve itself

    asked on April 3, 2015
  48. Physical Science

    The main difference between the internal combustion engine and the diesel engine is that the diesel engine A. does not have a crankshaft. B. does not utilize pistons. C. has no connecting rods. D. has no ignition system. pretty sure its d

    asked on February 27, 2015
  49. Precal

    The point (r,theta) in polar coordinates is (7,5) in rectangular coordinates. What is the point (2r, theta + pi/2) in rectangular coordinates? So I tried this problem and got r = sqrt(74). But while finding the value of theta, I got it equal to cot(5/7)

    asked on August 9, 2014
  50. Biochem

    If .1ml of serum, 5ml of reagent and 4.9ml of distilled water are mixed together what is the dilution of the serum in the final solution

    asked on March 23, 2014
  51. physics

    An object is dropped from a height of 12m.At what height is the rock kinetic energy and its potential energy be equal?

    asked on February 18, 2012

    Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250 kg ball with zero net charge was dropped from rest at a height of 1.00 m. The ball landed 0.350 s later. Next, the ball was given a net charge of 7.60 muC and

    asked on February 13, 2012
  53. math

    A disc jockey has 10 songs to play. Seven are slow songs, and three are fast songs. Each song is to be played only once. In how many ways can the disc jockey play the 10 songs if The songs can be played in any order. The first song must be a slow song and

    asked on February 6, 2012
  54. Chemistry

    A 2.50 gram sample of bronze was dissolved in sulfuric acid. The copper in the sample reacted with sulfuric acid to form copper sulfate. Cu (s) +2 H2SO4 (aq) -> CuSO4 (aq) +2 H2O (l) The copper sulfate formed in this reaction was mixed with I to form

    asked on October 31, 2010
  55. physics

    A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball's velocity relative to the field does not have a positive x component. Suppose

    asked on September 28, 2009
  56. math

    The acceleration of a particle at a time t moving along the x-axis is give by: a(t) = 4e^(2t). At the instant when t=0, the particle is at the point x=2, moving with velocity v(t)=-2. Find the position of the particle at t=1/2 if you could show me how to

    asked on February 23, 2009
  57. Economics

    Which of the following statements would come from someone classified as unemployed? A. I'm not working. I had three interviews this week, and I'm trying to find a job. B. I haven't had a job in a year, and I stopped looking for a job nine months ago. C.

    asked on June 13, 2007
  58. Science

    Which of these statements regarding enzymes is FALSE?

    asked on February 26, 2007
  59. Chemistry

    What intermolecular forces exist in dichloromethane, n-pentanol, and toluene besides London Dispersion Forces?

    asked on April 9, 2020
  60. Chemistry

    Nitrogen monoxide reacts with chlorine gas according to the reaction: 2NO (g) + Cl2 (g) ⇔ 2NOCl (g) Kp = 0.27 at 700 K A reaction mixture initially contains equal partial pressures of NO and Cl2 . At equilibrium, the partial pressure of NOCl is 115

    asked on April 4, 2017
  61. Physics

    Which two factors mainly affect ocean tides on Earth? Check two answers. Earth's revolution about both the Moon and the Sun the Moon the Sun the pull of distant planets

    asked on October 7, 2016
  62. Civics

    Which of the following is NOT part of the naturalization process? a. Filing a Declaration of Intention b. Taking a US history, gov't, or English language class c. Living in the US for 10 years d. Taking an Oath

    asked on July 18, 2016
  63. Calculus

    Use Simpson's rule with n = 4 to approximate. Keep at least 2 decimal places accuracy. Integrate: (cos(x))/(x) x=1 to 5

    asked on May 3, 2016
  64. Math

    Lim sin(60-x)/2cosx-1 x approaches 60

    asked on January 2, 2016
  65. World History

    Regarding Indonesia, which of the following statements is false? A. Indonesia was formerly the British East Indies. B. The first head of Indonesia was Sukarno. C. The first leader of Indonesia was Suharto. D. Indonesia was formerly the Netherlands East

    asked on March 10, 2015
  66. Chemistry

    The statement "matter can be neither created nor destroyed by chemical means, but it can be changed from one form to another" is the chemical law of A. definite proportions. B. atomic disintegration. C. conservation of energy. D. conservation of matter. im

    asked on February 25, 2015
  67. Physics

    bobpursley, is answering questions on this all you do?

    asked on December 6, 2014
  68. English

    Read the passage below and answer the question: Jack: I’ll be there in 20 minutes. I’m stopping at the store to pick up some batteries. Do you need anything? Mike: Will you buy some coffee for me? I’ll pay you back when you get here. Which statement

    asked on November 19, 2013

    $3000 invested at an APR of 5% for 7 years. If interest is compounded annually , what is the amount of money after 7 years?

    asked on January 27, 2013
  70. pennfoster

    Which of the following sentences contains a verb in the simple past tense? A. I was working overtime for about six months. B. We helped Joan to pack her things. C. She would like to join us. D. Jenna has driven this route multiple times.

    asked on January 19, 2012
  71. Physics

    A child of mass 40.0 kg is swinging on a swing with ropes of length 4.0 m. How long does it take the child to swing from the maximum height on one side to the other?

    asked on February 5, 2011
  72. chemistry

    Calculate the mass of salts needed for constructing a buffer using potassium monobasic phosphate and potassium dibasic phosphate with the total concentration of 100 mM. The solution is to be prepared in DI water and the pKa value for potassium monobasic

    asked on November 14, 2010
  73. geometry

    what are the possible coordinate of the midpoint of the given segment

    asked on November 8, 2010
  74. physics

    at on time, the velocity of a rifle bullet was measured using a ballistic pendulum made up of a wooden block suspended from a string. the block used here has a mass of 20kg. a 50g rifle bullet is fired into the block, penetrating it by 10cm and causing it

    asked on September 2, 2010
  75. SCIENCE 1

    the van der waals equation incorperates coreections for the ideal gas law in order to account for the properties of real gases. one of the corrections accounts for A.the average kinetic energy being inversely proportional to temperature B. the possibility

    asked on May 11, 2010
  76. Finance

    At what rate must $500 be compounded for it to grow to 1079.46 in 10 years? 8 percent? i think

    asked on November 12, 2009
  77. Chemistry

    Which of the following nitrogen oxide molecules and related ions is/are diamagnetic and has/have more than two charge-minimized resonance structures? 1. NO 2. NO2 3. N2O4 4. NO2-

    asked on October 25, 2009
  78. Physics

    Millikan's oil drop experiment suspended a charged oil drop in an electric field. By measuring the size of the drop and using the oil's density, the weight of each drop could be calculated. This allowed the charge of each drop to be found, which was always

    asked on June 18, 2009
  79. math

    how do you find the reference angle of csc,sec, cot? for example: csc theta= 2 times square root of 3 / 2

    asked on February 4, 2008
  80. Economics

    Will the aggregate quantity of goods and services demanded become more sensitive or less sensitive to changes in the price level if an economy becomes closed (that is, as foreign trade disappears)? In terms of the AD/AS diagram, will the AD curve become

    asked on June 18, 2007
  81. Science

    List the three main steps of aerobic cellular respiration. Which of these steps yields (by far) the most ATP? Here are two: Step One: Glucose enters the cell (insulin) and is split into 2 smaller 3 Carbon atoms called pyruvate. Total yield - 2 ATP Step

    asked on February 26, 2007
  82. Science

    When oxygen is present a. most cells utilize aerobic cellular respiration. b. most animal cells will carry on fermentation and produce lactic acid. c. most bacteria and yeasts carry on fermentation. d. two ATP molecules are produced for each glucose

    asked on February 26, 2007
  83. Science

    During the process of photosynthesis, solar energy is converted into: a. chemical energy. b. heat energy. c. thermal energy. d. mechanical energy. e. nuclear energy. a

    asked on February 26, 2007
  84. Math

    Given the following partition of the set A = { 6, 7, 8, 9, 10, 11 }. Find the associated relation { [6, 7, 8], [10], [9, 11] }.

    asked on April 24, 2020
  85. Math

    #1: a) Let a, b, c be integers and x is congruent to y (mod m). Prove that ax^2+bx+c is congruent to ay^2+by+c (mod m). b) Show that the result in part a may be false if a, b, c are not all integers, even if ax^2+bx+c and ay^2+by+c are both integers. #2:

    asked on April 21, 2020
  86. Maths

    The height h, in metres, of a ball thrown from a cliff can be modelled by the function with the rule h(t) = 20+15t-5t^2, where t less than/equal to 0 is the time measured in seconds. a) find the initial height of the ball b) find the time at which the ball

    asked on March 11, 2020
  87. math/algebra

    What is the absolute value of x-700 that is ≤ 80

    asked on September 17, 2019
  88. math

    : Find the value of x in the figure. ​

    asked on June 11, 2019
  89. Philosophy

    In Republic IV, Socrates argues that the human soul, like the good city, has three divisions. What are the divisions of the city? What are the corresponding divisions of the soul? Briefly give Socrates’s arguments for the divisions of the soul (beginning

    asked on November 8, 2018
  90. financial management

    a) An investment gives you $10,000 from years 1 through 4 and 40,000 in year 5. If the interest rate is 7.5%, what is the present worth of this investment? (2 points) b)You need $150,000 to buy a new car in 5 years’ time. How much should you save at the

    asked on October 14, 2017
  91. History

    Which of the following helped women in the workplace? A the Civil Rights Act of 1964 B the Voting Rights Act of 1965 C the end of segregation D Hernandez v. Texas I think it's D or b

    asked on April 11, 2017
  92. chemistry

    For the reaction 2Na(s)+Cl2(g)→2NaCl(s)2Na(s)+Cl2(g)→2NaCl(s), how many grams of NaCl could be produced from 20 L of Cl2Cl2 (at STP)?

    asked on March 3, 2017
  93. Physics

    Which of the following is an element? H2O Hydrogen Carbon dioxide A supernova

    asked on October 7, 2016
  94. Math

    lim as x approaches negative infinity (3x^5 + 6x + - 3) / (8x^4 + 10) a. Does Not Exist b. 0 c. -3/8 d. 3/8 I solved this and got negative infinity as the answer, but none of the answers are listed above. I finally chose Choice C, but my teacher said the

    asked on September 26, 2016
  95. Chem

    What type of orbitals are used to form the N–N bond in hydrazine, N2H4?

    asked on March 2, 2016
  96. Chemistry

    What set of hybrid orbitals is used by Xe in XeO3F2? dsp2 d2sp3 sp3 dsp3 d2sp

    asked on March 2, 2016
  97. Marshall Middle

    Of 450 lunches old at school on Thursday, 40% were hamburgers and the rest were pizza. How many more pizza lunches were sold than hamburgers?

    asked on February 28, 2016
  98. Trig

    a 12-ft-long guy wire is attached to a telephone pole 10.5 ft from the too of the pole. If the water forms a 52 degree angle with the ground, how high is the telephone pole?

    asked on February 17, 2016
  99. Finance

    Celeste just borrowed 47,500 dollars. She plans to repay this loan by making equal quarterly payments of 3,126.28 dollars for 19 quarters. If she makes her first quarterly payment later today, then what is the quarterly interest rate on the loan?

    asked on February 1, 2016
  100. Math

    Find the area of a triangle with base of 15 m and altitude of 12 m

    asked on August 6, 2015


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