Newest questions posted by john
  1. Cell Biology

    Note on the complexity of structural and functional organization in eukaryotic nucleus (7 marks)
  2. Math

    Determoine the cubic function with zeros -2, 3, and 4 and F(5) = 28
  3. Physics - Optics

    An incident beam strikes a prism with a small angle of 20 degrees (the light enters perpendicular to the prism but the other side of the prism is slanted 20 degrees). The microwave signal is maximized when the receiver makes an angle of θ = 7 degrees
  4. physics

    two cars approach a crossroad 36.0m ahead. Car A is traveling east at 9.00m/s and car B is traveling south at 12.0m/s. What is the location of car B relative to car A?
  5. Physics

    In the experiment, you will study a torsion pendulum and compare the periods of a suspended sphere and of a suspended cube. The rotational inertia of a sphere is Is = 1/10(MsD^2), where Ms is the mass of the sphere and D is its diameter. The rotational
  6. physics

    A dart is being thrown at a board that is 3.40 m away. When it hits the board it is 0.784 m below the point where it was aimed and it was thrown at 8.50 m/s. How long was the dart in the air?
  7. physics

    You are playing catch with your sibling in your backyard. If you toss a ball at 15.0 m/s at an angle of 24.0° and your sibling catches it at the same height, what is the maximum height above where it was thrown?
  8. physics

    You are thinking about taking gymnastics, so you go to the facility and get an idea of what to expect by looking out from the viewing room. The viewing room window is 4.30 m above the trampoline directly below, so it is perfect for viewing the the
  9. physics

    You are thinking about taking gymnastics, so you go to the facility and get an idea of what to expect by looking out from the viewing room. The viewing room window is 4.30 m above the trampoline directly below, so it is perfect for viewing the the
  10. physics

    While standing on top of a 220. m tall building, you see Iron Man flying straight down toward the ground at a speed of 30.0 m/s. Just as he passes you, you drop a can of Dr Pepper off the roof. How fast is the can going when it passes Iron Man?
  11. Calculus

    From what you know about the graphs of functions (i) through (v), pick out the one that is the derivative of f for x>0. Show your work. f(x)=x ln x-x i. y=sin x ii. y=ln x iii. y= x^(1/2) iv. y=x^2 v. y=3x-1
  12. Language Arts

    Im having trouble filling in this question "You had no right to call me clumsy ____________ just because i spilled some water on you" Fill This In
  13. physics

    A man whose mass is 80kg stands on a spring weighing machine inside an elevator. What is the readingof the weighing machine when the elevator starts to ascend with an acceleration of 2ms seque. the elevator is moving with a uniform velocity, the elevator
  14. physics

    A man whose mass is 80kg stands on a spring weighing machine inside an elevator. What is the readingof the weighing machine when
  15. Science

    Which of the following is a valid reason to study science A. All in employees require a in depth knowledge  of science. B. Carrying  out scientific experiments  is a requirement  to every day life. C. Most colleges require advanced  science classes D.
  16. Math

    If the shadow of a x metre tall tree is broken up in the middle and touches the top of the tree on the ground at a particular distance from the ground.calculate the image distance?
  17. history

    what common characteristics did John Smith and Anne Hutchinson display in their quest to save a colony or the souls of their fellow Christians?
  18. English check my answers please

    anyone familiar with the play the merchant of venice by william Shakespeare please check my answers 1.which of the following elements of comedy are not used by Shakespeare in in the merchant of venice? a.a clown like character b.puns c.slapstick d.clever
  19. World history

    Which temporary solution was adopted in 1924 to address the economic problems caused by Germany's inability to make reparations? A-Versailles plan B-Marshall plan C-Dawes plan D-young plan B?
  20. English

    In defence of free floating affixes state four arguments
  21. World history

    What was an impact of the United States entry into World War 1? A-the arrival of fresh troops to the allied side forced Germany to agree to cease-fire within a year. B-Britain shifted most of its troops to the eastern front because they were no longer
  22. Chemistry

    If a 3.9 lb ball of aluminum is coated with a 644 micrometer layer of gold, what is the density (in g/mL) of the gold-coated aluminum ball? The densities of aluminum and gold are 2.70 g/mL and 19.32 g/mL, respectively. Type your numerical answer to 2
  23. Physical Chemistry

    The Li2+ ion is hydrogenic and has a Lyman series at 740747 cm-1, 877924 cm-1, 925933 cm-1,and beyond. Show that the energy levels are of the form –hcR/n^2 and find the value of R for this ion. Go on and predict the wavenumbers of the two longest
  24. science

    A steel block weighing 12N is pulled up an incline plane 20° above the horizontal by a constant force of 7.35 N which makes an angle of 10° above the inclined plane. The block stars from rest and is pulled 2.0m along the inclined plane. the coefficient
  25. math

    if you have a 6 foot canvas and cut off 4 inches then how many feet would be left
  26. Science

    Can someone explain grade 9 biology translation and transcription for me? My teacher doesnt explain it well. I cannot understand it at all. Detailed description please and easy to understand.
  27. Trig/Algebra 2

    The following table of values compares national test scores to high school GPA at a certain school. National Test Score HS GPA 2350 3.95 1900 3.20 1825 2.00 2270 3.00 500 1.50 2000 4.00 1550 2.50 1030 1.17 1665 2.85 1380 2.25 2220 3.60 Using the equation
  28. Social Studies

    3. How did the grand coulee dam change economic activity in Washington? A. it encouraged the growth of new, water-intensive farming. B. it promoted a shift away from manufacturing toward extractive industries. reduced the amount of arable land
  29. Algebra

    $3000 invested at an apr of 5% for 7 years
  30. Maths

    solve using cramer's rule 3m+2n=10 and m+2n=4
  31. Math

    I don't know how to solve this equation. cos(30) = x / 6 How would I solve this to find the missing side of a 30-60-90 triangle?
  32. Sociology

    What role does culture play in society?
  33. Sociology

    Provide examples of any societal dangers that might occur when the results of poor research are publicized.
  34. science

    what does 4s^2 mean
  35. science

    A coastline on Earth experienced a high tide at 6 a.m. At what approximate time will the next low tide occur, and why? 6 p.m., because the coastline will turn 90 degrees from the moon 6 p.m., because the coastline will turn 180 degrees from the moon 12
  36. Math

    How do you find the product of 15 × 3 1/5 using distributive property?
  37. Chemistry

    If 50.0 mL of a 1.00 M solution of CaCl2 (solution A) is mixed with 85.0 mL of pure water to produce solution B and then 42.5 mL of solution B is mixed with 52.0 mL of solution A to give solution C, what is the concentration of CL^-(aq) in the final
  38. science

    two forces,80N and 100N acting at an angle of 60° with each other,pull on an object what single force would replace the two forces
  39. Trig

    rewrite in polar form x^2+y^2-6y-8=0 r^2=6r+6sin theta +8 r^2=6rsin theta +8 r^2=6r+6cos theta +8 r^2=6r cos theta +8
  40. Trig

    rewrite in polar form x^2+y^2-6y-8=0 Please help totally don’t et this :/
  41. Math

    Let R denote the region in the first quadrant bounded above by the line y 1 and below by the curve y -3, 0 3 x < 1. Find the centroid of the region R. You may use your calculator to evaluate any definite integrals invol ved.
  42. math

    A charity raffle offers a first prize of $1,000,000, a second place prize of $100,000 and a third place prize of $10,000. A total of 500 000 tickets will be sold. What price should be charged for a ticket in order for the charity to make a 60% profit on
  43. Calculus

    The region R is bounded by the x-axis, x = 1, x = 3, and y = 1/x3. a.) Find the area of R. b.) Find the value of h, such that the vertical line x = h divides the region R into two Regions of equal area. c.) Find the volume of the solid generated when R is
  44. Trig

    If sin a=0.31 cos a=0.95 sin b=0.47 and cos b=0.88 what is sin (a+b)? 0.78 -0.17 0.98 0.72
  45. Algebra

  46. Algebra

    Solving using 2 equations in two variable: Jason bought a total of 7 postcards for 1.80. If small cost 20 cents and the large ones cost 30 cents, how many postcards of each size did he buy?
  47. chemistry

    A narrow ray of yellow light from glowing sodium (λ0 = 589 nm) traveling in air strikes a smooth surface of water at an angle of θi = 40.5°. Determine the angle of refraction θr.
  48. Physics

    A narrow ray of yellow light from glowing sodium (λ0 = 589 nm) traveling in air strikes a smooth surface of water at an angle of θi = 40.5°. Determine the angle of refraction θr.
  49. Math

    Which does the Y intercept this function represent Y equals 2+ 4X
  50. Chemistry

    How many grams of a sodium salt would you need to prepare 500 ml of a buffer at pH = 3.29, using 0.100M solution. (Use 3 sig fig , atomic wts to whole number)
  51. Geometry

    Determine center of circle that contains the points (4,1), (-3,7), and (5,-2)
  52. Trig

    A telephone pole that is 14ft y’all has fallen against a house. If the top of the telephone pole touches the house 8ft. Above the ground, what is the angle that the telephone pole makes with the ground? Stuck on this question on my quiz not sure how I
  53. Algebra 1

    2 jets leave airport at 3pm, one traveling east other west. The westbound jet averages 625km/h and the eastbound jet 825 km/h. At what time will the jets be 725 apart?
  54. Algebra 1

    A train went 210 miles further than a bus. The train went four times further than the bus. how far did each vehicle travel?
  55. Economics

    Banks create money whenever they: A: accept a deposit. B: receive monthly payments on their loans. C: receive interest on existing loans. D: lend excess reserves to a borrower.
  56. Math

    Which is likely to have a mass close to 2 kilograms A.a grown elephant B.a pineapple C.a 3-year old child** acron
  57. physics

    Suppose an obstruction in an artery reduces its radius by 16%, but the volume flow rate of the blood in the artery is remains the same. By what factor has the pressure drop across the length of this artery increased?
  58. Java Programming

    Add 2 constructors to the Course class. One that takes no arguments and initializes the data to all 0’s and “” (empty strings). And one constructor that takes all 4 arguments, one argument for each property and then sets the properties to these
  59. History

    Hi, so I have this question. The growing popularity of newspapers, magazines, and books in the United States during the 19th century contributed to which of these? The emergence of a uniquely American literary style The expansion of educational
  60. Math

    Solve the following equation =0.017=2x^2/(0.0550-x)(0.165-x). I was told it was 0.00196. But I got like 0.00247. Is 0.00196 correct?
  61. Statistic

    Calculate the following probabilities (to 2 decimals) using the table of joint probabilities. A1 A2 B1 .4 .3 B2 .2 .1 a. P(A1|B2) = b. P(B2|A1) = c. Did you expect the answers to Parts (a) and (b) to be reciprocals? That is, did you expect that P(A1|B2) =
  62. Chemistry

    Sorry for postiong twice. But I really need to know if the answers I am getting are correct; Nitrogen and oxygen react to produce nitric oxide according to the following equation: N2 (g) + O2 (g) → 2 NO (g) The equilibrium constant for this reaction is
  63. Chemistry

    The compound NOCl decomposes to nitric oxide and chlorine according to the following equation: 2 NOCl (g) → 2 NO (g) + Cl2 (g) Suppose that 0.550 mol NOCl is placed in a 2.00-L flask at a given temperature. When equilibrium has been established, it is
  64. S.S

    In the election of 1856, Millard Fillmore was the Know-Nothing candidate and received 21 percent of the popular vote. What conclusion could be drawn from this fact? A. A significant number of people opposed slavery. B. A significant number of people were
  65. S.S

    5. The Underground Railroad used escape routes that went throughout the South. Based on that fact, which of the following conclusions could be made? (1 point) A. The Southern states were leaning toward emancipation of the slaves. B. Slaves were hopeful to
  66. Trigonometry

    A pilot wants to maintain a course of 40° and a ground speed of 300 mph against a 45 mph wind from 20° west of north. What should his heading be?
  67. Trigonometry

    a small blimp has an air speed of 24km/h on a heading of 42°. The wind's speed is 9 km/h and its direction is 312°. Find the ground speed and drift angle of the blimp.
  68. Trigonometry

    An airplane is traveling at 650 mph on a heading of 255°. The wind is blowing from a bearing of 320° at 28 mph. What is the ground speed and the actual bearing of the airplane? P.S. I prefer the law of cosine/sine method
  69. Trigonometry

    An airplane with a speed of 485 km/h is traveling with a heading of 83.5°. The wind velocity is 38 km/h in the direction of 191°. Find the ground speed of the airplane. P.S. How do you solve this problem by only using the law of cosine/sine method?
  70. Math

    The triangle inequality theorem states that the sum of the lengths of any two sides of a triangle is greater than the length of the third side. The lengths of two sides of a triangle are 15 ft and 27 ft. Find the possible lengths of the third side. The
  71. Trigonometry

    A person can swim at a speed of 2 kilometers per hour in still water. If he heads across a river at right angles to current of 5 kilometers per hour, find his speed in relation to the land and the direction in which he actually moves.
  72. Trigonometry

    An airplane is headed southwest (bearing 225°) with an air speed of 550 miles per hour, with the wind blowing from the northwest (bearing 135°) at a speed of 110 miles per hour. Find the drift angle, ground speed, and the course of the airplane.
  73. Trigonometry

    An airplane is headed on a bearing of 140° with an air speed of 500 miles per hour. The course has a bearing of 128°. The ground speed is 580 miles per hour. Find the drift angle, the wind direction, and the wind speed.
  74. Math

    A ladder is placed so that its foot is 2 m from a wall. The ladder touches the top of a 2 m fence that is 1.5 m from the wall. State how you know the two triangles in the diagram are similar. How high up the wall does the ladder reach?
  75. Octotarian!

    Wow! Congratulations Ms. Sue! You are sharp as a tack : ) It is exciting that you are still excited to help students understand their studies.
  76. math

    0.492063492 divided by 226
  77. math

    3.72380952 divided by 4.16190476
  78. math

    (3/4 divided by 3/100 - 47/2) divided by 3/2 times 1/2 +7/6 =
  79. math

    (8.75−17/6) divided by 7.1+(9/2+8/3) divided by 43/10
  80. math

    13/6-11/15x=0.15 x=
  81. math

    5/9 divided by x=15/4 x=
  82. math

    3/x=x/12 x=
  83. math

    7/x=12/14 x=
  84. math

    13/6-11/15x=0.15 x=
  85. math

    0.25x-7/6=7/3 x=
  86. math

    0.25x-7/6=7/3 x=
  87. math

    13/6-11/15x=0.15 x=
  88. math

    11/2+0.6x=16 x=
  89. math

    5/9 divided by x=15/4 x=
  90. math

    144/25=x/5 x=
  91. math

    3/x=x/12 x=
  92. math

    7/x=12/14 x=
  93. math

    Solve the problem by making up an equation. A child is 12 years old, and his father is 32 years older. In how many years will the age of the father be 3 times the age of the child? Just tell me the equation.
  94. Science

    How many calories of heat energy are required to melt 20 grams of ice at 0 °C? Answer: _____ calories How many calories of heat are required to evaporate 20 grams of liquid water at 0 °C? Answer: _____ calories
  95. Math

    A carpenter has several boards of equal length. He cuts 3/5 of each board. After cutting the boards, the Carpender notices that he has enough pieces left over to make up the same length as four of the original boards. How many boards did the Carpender
  96. physics

    A 18 kg rock is attached to a 52 N/m spring, you then start to swing the spring above your head in a horizontal circle at 32 radians/s. Calculate how far the spring will stretch during this motion assuming its relaxed length is 1.5meters. Ignore any
  97. algebra 2

    The mass of the particles that a river can transport is proportional to the sixth power of the speed of the river. A certain river normally flows at a speed of 3 miles per hour. What must its speed be in order to transport particles that are 200 times as
  98. math

    definition of hypotenuse
  99. math

    How many different right triangles are there with a hypotenuse of length 5 cm?
  100. math

    How many different triangles with sides of measurements of 3, 4, and 5 are there?