Newest questions and responses by john
  1. Pyshics

    The wavelength of light visible to the human eye is on the order of 6x10^-7 m. Find the frequency of the light wave if the speed of light in air is 2.99792x10^8m/s. Answer in s^-1

    asked on February 20, 2019
  2. algebra

    √9+√x - √x = 5 ÷√9+√x

    asked on February 20, 2019
  3. algebra

    √9+x - √x=5/√9+x

    asked on February 20, 2019
  4. math

    What are the equations of the asymptotes of y=−1.6x+0.3−3.4? A. x=0.3 and y=3.4 B. x=−0.3 and y=3.4 C. x=0.3 and y=−3.4 D. x=−0.3 and y=−3.4 Which of the following hyperbolas has a center at (−2,3)? A. y=4x+3+2 B. y=4x+2+3 C. y=4x−2+3 D.

    asked on February 19, 2019
  5. math

    elimination method 4p+3q=6 and 3p-5q=-10

    asked on February 19, 2019
  6. Physics

    A velocity selector is built with a magnetic field of magnitude 5.2 T and an electric field of strength 4.6 × 10 ^4 N/C. The directions of the two fields are perpendicular to each other. At what speed will electrons pass through the selector without

    asked on February 13, 2019
  7. math

    Jane is organizing a fundraiser to buy a ping-pong table for the community center. The table costs $500.00. Jane is asking contributors to pay for an equal share of the cost of the table. She already has five contributors lined up. What function models the

    asked on February 7, 2019
  8. math

    1/2x+1/3y=5 sub 1/4x+y=0

    asked on February 4, 2019
  9. math

    The population of a southern city follows the exponential law. If the population doubled in size over 28 months and the current population is 70 comma 000​, what will the population be 4 years from​ now?

    asked on January 28, 2019
  10. Art

    A curator decides to display an eighteenth-century painting in a windowless room with controlled temperature and humidity. Pick the answer that best describes the reasons for her choice: A. The curator wants to make sure that the temperature and humidity

    asked on January 28, 2019
  11. Chemistry

    Calculate the number of mole of CaCl2 obtained from 25g of limestone CaCO3 in the pressure of excess HCl (C=,12, O=16, Cl=35.5)

    asked on January 14, 2019
  12. arkansas history

    where are the major cities located

    asked on January 8, 2019
  13. Math

    3/8 + 1/5 = __

    asked on December 20, 2018
  14. Physics

    A 94.0kg fullback moving south with a speed of 5.1m/s has a perfectly inelastic collision with a 90.0kg opponent running north at 3.0m/s. A. Calculate the velocity of the players just after the tackle. B. Calculate the decrease in total kinetic energy

    asked on December 17, 2018
  15. Maths

    2 Similar Cups are 3cm&5cm deep,if larger Cup holds 625cm cube of water,find smaller cup Volume

    asked on December 7, 2018
  16. English

    1. Early in Act II of The Phantom Tollbooth, Milo meets a character named Kakafonous A. Dischord, Doctor of Dissonance. Stage directions tell you that "Two screeches and a bump are heard." The doctor's name and the stage directions are clues to the

    asked on December 3, 2018
  17. Math

    Bob is driving along a straight and level road towards a mountain. At some point, he measures the angle of elevation to the top of the mountain and finds it to be 22.5 degrees. He then drives 1 mile (5280 ft) and measures the angle of elevation to be 34.4

    asked on November 29, 2018
  18. Math-precalc

    Compute or solve the following in radians without a calculator a. csc x=2, pi/2 ≤ x ≤ pi b. cot x= -1 , 3pi/2 ≤ x ≤ 2pi Thanks!

    asked on November 29, 2018
  19. physics

    m1 = 2.3 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 45 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with

    asked on November 23, 2018
  20. Math

    D is partly constant and partly varies with y.when y=6,x=9.Find the relationship between xandy.Find x when y=4.

    asked on November 21, 2018
  21. Ed Tech

    Which of the following strategies might be useful when organizing items in your study area? Put everything in one big bin so it is easy to clean up It is important to spend a lot of money on fancy organizational containers. Once you organize your desk, you

    asked on November 14, 2018
  22. Math

    Lincoln School is having a fundraising contest. Each student is to design a school poster. The designs are to be made to fit a rectangle that is 12 cm by 16 cm and then dilated by a scale factor of 3. What will be the perimter and area of the final poster?

    asked on November 13, 2018
  23. science

    A projectile is fired horizontally from a gun that is 45.0m above flat ground, emerging from the gun with a speed of250m/s. Calculate the amount of time taken by the projectile in the air?

    asked on November 13, 2018
  24. Physics

    A screw jack has 90 threads tothe metre. the effort is applied at the end of an arm 20cm long whatforce must be applied to lift a load of 150N ?

    asked on November 11, 2018
  25. physics

    2. A baseball starts from rest and rolls 50.0 m down a hill in 10.0 seconds. What is the acceleration?

    asked on November 7, 2018
  26. Math

    State an equation of a rational function that satisfies the given conditions: vertical asymptote at x=5, horizontal asymptote at y=-3, and x-intercept is 5/2. Need help solving.

    asked on November 5, 2018
  27. Civic education

    Four ways in which leaders can protect the interest of their followers

    asked on November 4, 2018
  28. Math

    Granda's soup company packages soup that serves 4 in cylindrical cans having a base diameter of 8cm and a height of 10cm. It wants to introduce the soup in single serving cans. If the company keeps the height of the new can at 10cm, what should its new

    asked on November 3, 2018
  29. Math

    Mr Smith paid $30,000 for a rectangular lot 1,200 feet wide and 1,600 feet long. What is the approximate cost per square foot? Please show work so I can understand the problem... Thank you

    asked on November 3, 2018
  30. Math - Algebra

    What is the value of the greatest of four consecutive integers if the least minus twice the greatest equal 8? Please show the work so I can understand how to complete the problem - thank you

    asked on November 3, 2018
  31. trigonometry

    cosA = 1/8 with A in QIV, find cscA/2

    asked on November 1, 2018
  32. civic

    how can leaders protect the right of their followers

    asked on October 27, 2018
  33. physics

    a stone is projected at an angle of 60decree an and initial velocity of 20msper seconds. determine the time of the flight

    asked on October 26, 2018
  34. differential algebra

    The fraction of a cohort of AIDS patients that survives a time t after AIDS diagnosis is given by S(t) = e^(-kt). Suppose the mean survival for a cohort of hemophiliacs diagnosed with AIDS before 1986 was found to be T (avg) = 6.4 months. What fraction of

    asked on October 25, 2018
  35. maths

    A tree casts a shadow of 34 feet at the time when a 3-foot tall casts a shadow of 1.7 feet. what is the height of the tree?

    asked on October 23, 2018
  36. Chemistry

    What is the mass in grams of copper chloride dihydrate (CuCl2·2H2O) required to prepare 80.0 mL of a 0.10 M CuCl2 solution?

    asked on October 20, 2018
  37. Cell Biology

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

    asked on October 14, 2018
  38. Math

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

    asked on October 14, 2018
  39. 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

    asked on October 11, 2018
  40. 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?

    asked on October 11, 2018
  41. 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

    asked on October 10, 2018
  42. 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?

    asked on October 10, 2018
  43. 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?

    asked on October 10, 2018
  44. 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

    asked on September 27, 2018
  45. 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

    asked on September 27, 2018
  46. 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?

    asked on September 27, 2018
  47. 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

    asked on September 25, 2018
  48. 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

    asked on September 10, 2018
  49. 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

    asked on August 25, 2018
  50. physics

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

    asked on August 25, 2018
  51. 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.

    asked on August 24, 2018
  52. 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?

    asked on July 22, 2018
  53. 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?

    asked on July 18, 2018
  54. 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

    asked on July 16, 2018
  55. 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?

    asked on July 13, 2018
  56. English

    In defence of free floating affixes state four arguments

    asked on July 12, 2018
  57. 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

    asked on July 11, 2018
  58. 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

    asked on July 1, 2018
  59. 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

    asked on June 27, 2018
  60. 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

    asked on June 20, 2018
  61. math

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

    asked on June 14, 2018
  62. 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.

    asked on June 13, 2018
  63. 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

    asked on June 10, 2018
  64. 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

    asked on June 7, 2018
  65. Algebra

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

    asked on June 7, 2018
  66. Maths

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

    asked on May 27, 2018
  67. 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?

    asked on May 25, 2018
  68. Sociology

    What role does culture play in society?

    asked on May 19, 2018
  69. Sociology

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

    asked on May 18, 2018
  70. science

    what does 4s^2 mean

    asked on May 12, 2018
  71. 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

    asked on May 10, 2018
  72. Math

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

    asked on May 2, 2018
  73. 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

    asked on April 29, 2018
  74. 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

    asked on April 29, 2018
  75. 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

    asked on April 26, 2018
  76. Trig

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

    asked on April 26, 2018
  77. 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.

    asked on April 26, 2018
  78. 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

    asked on April 24, 2018
  79. 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

    asked on April 24, 2018
  80. 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

    asked on April 23, 2018
  81. Algebra


    asked on April 18, 2018
  82. 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?

    asked on April 18, 2018
  83. 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.

    asked on April 15, 2018
  84. 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.

    asked on April 15, 2018
  85. Math

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

    asked on April 9, 2018
  86. 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)

    asked on April 9, 2018
  87. Geometry

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

    asked on April 4, 2018
  88. 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

    asked on March 29, 2018
  89. 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?

    asked on March 28, 2018
  90. 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?

    asked on March 28, 2018
  91. 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.

    asked on March 28, 2018
  92. 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

    asked on March 27, 2018
  93. 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?

    asked on March 23, 2018
  94. 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

    asked on March 17, 2018
  95. 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

    asked on March 12, 2018
  96. 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?

    asked on March 12, 2018
  97. 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) =

    asked on March 11, 2018
  98. 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

    asked on March 10, 2018
  99. 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

    asked on March 10, 2018
  100. 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

    asked on March 7, 2018