Questions Asked on
February 15, 2018

  1. Chemistry

    How many moles of carbon dioxide would be produced if 0.28 moles of propane, C3H8, were combusted? C3H8 + 5 O2 --> 3 CO2 + 4 H20

    asked by Emileigh
  2. Calculus

    For what values of k does the series ∑n=1 to infinity (11/(2k^2 + 3))^n converge? I think this is k < -2 and k > 2.

    asked by Anonymous
  3. Astronomy

    If a star is receding (moving away from us) at a speed of 1.8% of the speed of light, at what wavelength would a spectral line with a laboratory wavelength of 422 nm be observed? Express your answer in nm to the nearest 0.1 nm.

    asked by Xenon
  4. Astronomy

    Star A has 3 times the surface temperature and 0.6 times the radius of Star B. What is the ratio of the luminosity of Star A to the luminosity of Star B? (Indicate your answer to an accuracy of 0.1).

    asked by Xenon
  5. Astronomy

    At what wavelength will the spectrum of a perfect black body with a temperature of 8,009 Kelvin peak, assuming that a perfect black body at 6000 Kelvin has a spectrum that peaks exactly at 500 nm? Express your answer in nm to the nearest whole nm. (Use the

    asked by Xenon
  6. Astronomy

    When used at a wavelength of 1 micron, a telescope can resolve angles as small as 0.1 seconds of arc. How small an angle could the telescope resolve when used at a wavelength of 5 microns? a. 0.02 seconds of arc b. 0.004 seconds of arc c. 0.5 seconds of

    asked by Xenon
  7. Astronomy

    In the laboratory, an atom emits a spectral line at a wavelength of 400 nanometers. In the spectrum of a star, the same spectral line is found to have a wavelength of 410 nanometers. What can be said about the star? a. It is hotter than the Sun. b. It is

    asked by Xenon
  8. Astronomy

    A star is moving away from an observer at 1% of the speed of light. At what wavelength would the observer find an emission line which would occur at a wavelength of 6000 Angstroms if the star were at rest? a. 6060 Angstroms b. 6010 Angstroms c. 6000

    asked by Xenon
  9. Astronomy

    A TV satellite broadcasts at a frequency of 5000 MHz, (1 MHz = 1 million Hertz). What is the wavelength of this radiation? a. 1000 cm b. 5 million centimeters c. 6 cm d. 0.3 cm

    asked by Xenon
  10. Astronomy

    The same telescope is used to obtain an image using light of the following wavelengths. Which of the images will have the poorest angular resolution? a. blue b. yellow c. red d. infrared

    asked by Xenon
  11. math

    A spool of rope contains 73 yards of rope. How many​ 4-foot pieces of rope can be cut from the​ spool? How much rope is left​ over? There are nothing pieces of​ 4-foot rope that can be cut from the spool. ​(Type a whole​ number.)

    asked by rod
  12. Calculus Please Help

    How much work is required to lift a 700kg satellite to an altitude of 1x10^6m above the surface of the earth? The gravitation force is F=GMm/r^2, where M is the mass of the earth, m is the mass of the satellite, and r is the distance between them. The

    asked by Daniel
  13. Chemistry

    One liter of a buffer composed of 1.2 M HNO2 and 0.8 M NaNO2 is mixed with 400 mL of 0.5 M NaOH. What is the new pH? Assume the pKa of HNO2 is 3.4.

    asked by anon
  14. MATH

    does anybody know how e^−b(3.55 s)/(0.310 kg) = 0.750? I don't understand how it could equal .750

    asked by Anonymous
  15. physics

    A small sphere of mass m = 0.520 kg is dropped from rest into a viscous liquid in which the resistive force on the sphere can be expressed as FD = −bv, and reaches one-fourth of its terminal speed in 3.14 s. (a) What is the terminal speed of the sphere?

    asked by joy
  16. Algebra 2

    Find the A) Constant of Variation, B) the Equation of the Variation, and the C) the Solution Suppose B varies directly with C and inversely with D and the cube root of A. B = 4 when A = 27, C = 2, and D = 5. Find B when C = 3, A = 64, and D = 6.

    asked by Nate
  17. Algebra 2

    Find the A) Constant of Variation, B) the Equation of the Variation, and the C) the Solution Y varies directly with x. If y = -4 when x = 2, find y when x = 6.

    asked by Nate
  18. Algebra 2

    Find the A) Constant of Variation, B) the Equation of the Variation, and the C) the Solution The volume V of gas varies inversely to the pressure P. The volume of a gas is 200 cm^3 under pressure of 32 kg/cm^2. What will be its volume under pressure of 40

    asked by Nate
  19. Algebra 2

    Jimmy is wanting to fence a rectangular area of his land along Elm Creek. He will only need to fence 3 sides. If Jimmy has 2000 ft of fencing and wants to enclose the largest possible area, determine the dimensions of the rectangular plot. Hint: Write an

    asked by Nate
  20. Algebra 2

    Describe the transformation to the parent function in order to graph the following function, then write the equations of the Vertical and Horizontal Asymptote. Y = _1__ + 5 x- 3

    asked by Nate
  21. Algebra 2

    Describe the transformation to the parent function in order to graph the following function, then write the equations of the Vertical and Horizontal Asymptote. Y = _-2___ + 4 x

    asked by Nate
  22. math

    A rubber band is stretched around the four circles (each with radius r cm). i) Show that the total length of the rubber band is given by the expression r(8+2π)cm. ii) Show that the area of the shape is given by the expression r^2(12+π) cm^2

    asked by anonymous
  23. Chemistry

    The molecules present in 5.2gms of glucose will be c6h12o6

    asked by Chemistry
  24. Chemistry

    A sample of oxygen has a volume of 205cm³ when its temperature is 22.0°C and its pressure is 30.8 kPa. What volume will the gas occupy at STP?

    asked by Leti
  25. Physics

    I am taking an online course in physics and I need to write a short paper on Analog and digital information. Below are the questions that guide me through the paper. I am having a hard time finding a website that can explain this to me. There is no text

    asked by daisy
  26. Chemistry

    How do I plot the freundlich isotherm graph given P/atm and V/cm3 data. I know that the plot is suppose to be log x/M vs log c. However, how do I get the x/m from the data and which is the c. I have already plotted the Langmuir isotherm of this data. How

    asked by Sarah
  27. ALGEBRA I

    Last spring Steve joined a health club. The club charges a one-time enrollment fee of $150.00 plus a $25.00 monthly fee. Let n represent the number of months Steve pays for membership. Which of the following best represents the domain of the situation?

    asked by Libby
  28. Math

    4 balls and 3 pen cost 12 find the 6 ball and6 pen coat

    asked by Anonymous
  29. MATH

    _DE MORGAN'S LAWS_ (a). (A n B)^c = A^c U B^c (b). (A U B)^c = A^c n B^c Please friends I need solutions to this set

    asked by Simon
  30. social studies

    What was a direct result of the United States' fear that the Soviet Union would expand is power around the world? 1)World War II 2)the Cold War 3)communism 4)the Treaty of Versailles I think #2 Thank you.

    asked by Jamie
  31. Statistics

    I'm trying to figure out which type of factorial ANOVA test to use for this data. The data is from a hypothetical study looking at whether males or females are more likely to ask questions during a seminar where people give various presentations. The

    asked by Grace
  32. Math

    Which Solid has one base that is a rectangle and four lateral surfaces that are triangles? A triangular pyramid B Cone C rectangular prism D rectangular pyramid *** Am I right?

    asked by Fortnite God
  33. Art History

    What piece of art is probably the most recognized piece of Greek sculpture? a. Aphrodite of Melos*** b. Winged Victory of Samothrace c. The Laocoon d. Boy Strangling a Goose

    asked by Anonymous
  34. Science

    Identify the process that is necessary for sexual reproduction, explain why it is necessary, and identify how this process increases genetic variation.

    asked by Harper
  35. Health check my answer

    During which stage of stress does the body adapt to the ongoing presence of the stressor A. Alarm B. Resistance C. Fight-or-flight*** D. Exhaustion

    asked by Person
  36. college

    f) Calculate the simple interest for a loan for $24,700, for 2 1/4 years at 3.4% interest per year. Round to the nearest cent.

    asked by jeff
  37. Science

    Meteorologist notice a low pressure Area developing over warm ocean water which type of storm is likely to form

    asked by Anonymous
  38. math

    How do i solve a set of equations that are set equal to eachother?

    asked by Anonymous
  39. ELA

    Which correctly identifies the verb and its mood in this sentence? Be careful with that dripping paintbrush. A) Verb: be Mood: indicative B) Verb: be Mood: imperative C) Verb: dripping Mood: imperative D) Verb: dripping Mood: indicative c?

    asked by Dolphin
  40. ELA

    Video Presentation Permission Form Mary O'Dell Video Broadcast Permission Form Willow High School Teacher’s Name: __________________________ Date: __________ Name of Video:____________________________________________ Video rating - G PG PG-13 R NR (not

    asked by Dolphin
  41. ELA

    A Screamingly Good Science Lesson Elizabeth Kibler 1Amusement park rides give us thrills, exhilaration, and delight. If you pay attention, these rides can give you something else—a science lesson. Roller coasters are amazing rides that can twist and veer

    asked by Dolphin
  42. Calculus

    Which of the following series converge? A. ∑n=1 to infinity of 1/n^2 B. ∑n=1 to infinity of 1/n C. ∑n=1 to infinity (-1)^n/(√n) I think the answer is A and C.

    asked by Anonymous
  43. Math

    1. Write a ratio and a percent for the shaded area. A. 6/25, 30% B. 3/50, 6% C. 6/25, 24% D. 3/10, 30% 2. Model 24% on a 5 x 5 grid. Cant do the answers, but if you did it please tell me! 3. Write a ratio as a percent In the seventh grade class, 19/25

    asked by Please help me
  44. Chemistry

    Consider the reaction below : P4(s) + 5O2(g) P4O10(s) How many grams of phosphorus react with 1.195 x 102 L of oxygen (O2) at STP (standard temperature and pressure) to form tetraphosphorus decaoxide?

    asked by Rayan
  45. Algebra 2

    Given the exponential function A(x) = P(1 + r)x, what value for r will make the function a decay function? r = −2.1 r = 2.1 r = 0 r = 0.1

    asked by Michelle
  46. Aljebra

    Can someone check for me thanx 16 ÷ (8)(2)-12÷[6-2]+6÷(4-2) My answer is 1

    asked by Jasmine
  47. English

    1. Part A-which pair of words best describes the speaker's attitude toward elements of nature in "wind and water and stone"? A. ignorant and uncaring B.joyful and loving C.angry and scared D.calm and accepting*** Part B-Which line from the poem best

    asked by Anonymous
  48. Physics

    2 point charges with the same magnitude (5*10^-8) but opposite signs are 10m apart. What is the magnitude and direction of the force at the midpoint between the charges? I am supposed to do E=(k*q1)/r is r (distance) 10m or 5m (midpoint)

    asked by Pat
  49. English 12

    Lesson 10: The Romantic Period (1798-1832) Unit 7 1. In this unit, you read William Wordsworth's poems "Lines Composed a Few Miles Above Tintern Abbey," "The World is Too Much with Us," and "I Wandered Lonely as a Cloud." How are these poems representative

    asked by Lirio
  50. Reading

    The Kepler spacecraft was designed to investigate humanity last unexplored frontier the far reaches of space. The NASA space telescope looks deep into the Milky Way galaxy for the sign of habitable planet where a human can potentially thrive, in the

    asked by Anonymous
  51. History

    Which of the following is the best reason why the Civil War did not completely end racial segregation in America? 1:The Thirteenth Amendment, which ended slavery, was not ratified until a decade after the war ended. 2:The Civil War era lacked the powerful,

    asked by anonymous
  52. history

    which factors influenced the growth of the ranching industry? select all that apply. * American Indians were driven out of the North Texas Plains. * More cattle trails were developed. * Ranchers received ownership rights. * Barbed wire was invented.

    asked by Anonymous
  53. help (Reading)

    This question asks about your Independent Reading selection. You may use your reading selection to help you answer the question. Compare and contrast your Independent Reading selection with one or two other selections you have read in this unit. Support

    asked by Jam Jam Jam
  54. Government

    What can the local government do to help with a petition?

    asked by SkittishKitten
  55. Math

    I swam 10 cycles in 13.5 seconds what is my stroke rate?

    asked by Rob
  56. Algebra

    Radio signals travel at a rate 3 * 10^8 of meters per second. How many seconds would it take a radio signal to travel from a satellite to the surface of the Earth if the satellite is orbiting at a height of 3.6 * 10^7 meters? A.) 8.3 seconds** B.) 1.2 *

    asked by Dylan
  57. english

    write a composition three to five paragraphs

    asked by rhonda
  58. Math

    Ashley needs 4.6 yards of chain to hang some flower baskets. The chain is sold by the meter. She knows that 1 yard=0.914 meter. How many meters of chain does Ashley need?

    asked by Melissa
  59. Math

    What is the experimental probability that the next vehicle that comes on the lot will be a red car? Red White Silver Car 45 41 46 Truck 21 24 23

    asked by Lisa
  60. English

    And what shoulder and what are,/could twist the sinews of thy heart? Which of these is nearest in meaning to the word sinews as it is used in the lines above? A:Bones B:Essence*** C:Longevity D:Location I know sinew has to do with bones...but that answer

    asked by anonymous
  61. math

    why is a spheres volume to surface area ratio the lowest out of a sphere, cylinder, and a cube? this is part of how im going to do this big project im doing, and i know a sphere has the smallest one, im just not sure why

    asked by .
  62. History

    what is pericles most likely suggesting about greek government

    asked by Dallas
  63. geometry

    find the values of angles X, Y, and Z. x=91; y= 51;z=31 x=89; y=91; z=0 x=60; y=120; z=31 please HELP!!! math 7 B unit 1 geometry test!!!! anyone from Connections Academy 7th grade please help me

    asked by georgia :)
  64. Social Studies 7

    How does the strong history of immigration in the United States influence the kind of nation we have become?

    asked by Kit-Kat
  65. AP physics help

    Two identical waves undergo pure constructive interference. How is the resultant intensity related to that of the individual waves? A. resultant intensity is half of wave intensity B. resultant intensity is same as individual wave intensity C. resultant

    asked by tyger2020
  66. more physics....

    To increase intensity of a wave by a factor of 50, by what factor should the amplitude be increased? This is also coming from the homework based on topics the video didn't cover. I know that power is proportional to amplitude squared, but what does this

    asked by tyger2020
  67. Math

    The sum of half a number and 5 is 9. What is the number?

    asked by Dallas
  68. sience

    Multiple Choice 1. At the chromosomal level, what is the difference between human males and human females? (1 point) All males have a Y chromosome, and females do not. All males have an X chromosome, and females do not. All males have 47 chromosomes, and

    asked by sadgrg
  69. English

    Which of the following transitions shows a comparison? 1)although 2)however 3)just as 4)whereas I think #3 Thanks

    asked by Jamie
  70. Algebra

    Solve the following problem: –43 + 17 = A. 60 B. 26 C. –26 D. –60

    asked by Davlin
  71. MATH helpp!!

    Find the range of the function f(x)=4x-1 for the domain {-1,0,1,2,3} A){-5,-30,7,11} B){-5,-4,-3,-2,-1} C){-11,-7,-3,1,5} D){-5,-1,3,7,11} Can someone help, am i right is the answer B????

    asked by that emo girl!
  72. Math

    Diego has $11 and begins saving $5 each week toward buying a new phone. At the same time that Diego begins saving, Lin has $60 and begins spending $2 per week on supplies for her art class. Is there a week when they have the same amount of money? How much

    asked by Kendall Stepp
  73. Maths

    Isosceles triangle $ABE$ of area 100 square inches is cut by $\overline{CD}$ into an isosceles trapezoid and a smaller isosceles triangle. The area of the trapezoid is 75 square inches. If the altitude of triangle $ABE$ from $A$ is 20 inches, what is the

    asked by Anonymous
  74. A B C order

    Does "brother's" come before "brothers' " in A B C order?

    asked by Alice
  75. geometry

    math 7 b unit 2: measurement lesson 2: Area and Perimeter of triangles. who has the answers to this from connections academy

    asked by aly
  76. Science

    What is the definition of energy?

    asked by Roberto
  77. Science

    If the mass of each ball were the same, but the velocity of ball A were twice as much as ball B, what do you think would happen to the final velocity of each ball after the collision? To answer this question, create a hypothesis in the form of an if-then

    asked by Anonymous2434
  78. SS

    HOW CHINA AND JAPAN DEVELOPED MODERN ECONOMIES(400 words,5 para)

    asked by help ASAP
  79. Spanish 1

    Ana y Claudia _______ traen. (los manteles) A- Nos B- Lo C- Las D- Los

    asked by Alexis
  80. Chem

    The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1°C and 100.0 torr at -6.3°C. What is ΔHvap (in the unit of kJ) of chloroform?

    asked by Abbey
  81. math

    Abigail lives in an off-campus apartment. Some days she rides her bike to campus, other days she walks. When she rides her bike, she gets to her first classroom building 36 minutes faster than when she walks. If her average walking speed is 3 mph and her

    asked by James
  82. World History

    Which explains why Ottoman leaders began a policy of deportation and extermination of the armenians within their empire? a. they argued that Armenians were spreading anti-turk propaganda among the ottoman population b. they claimed that armenians were

    asked by Anonymous
  83. Modern World Studies

    Hi! I just needed someone to check my answer on this question before I turned it in. Although they are considered an important part of Native American culture, there were no ____ in the Americas before Spanish explorers arrived. A: tomatoes (I pick this)

    asked by Help please!
  84. math

    Surface Area: 4r^2 41.25^2 S.A= 19.6 inches^2 Volume: 4/3r^3 4/3 1.25^3 V=8.2 inches^3 could someone check my math?

    asked by .
  85. Science

    1. If you are driving down the road, how do you know that the car is moving (think about your reference point)?

    asked by I Dont Matter
  86. Math

    After school, Laura babysits one child for 50 minutes. The rest for 10 minutes read for 15 minutes and play for the rest of the time write the total babysitting time the resting time and the reading time as fractions of an hour

    asked by AALIYAH
  87. math

    In a recent year, 23.3 % of all registered doctors were female. If there were 46,800 female registered doctors that year, what was the total number of registered doctors?

    asked by jaykwon
  88. math

    if we have : (x + a)^2 and (x +b)^2 what will be the general form of the square of a binomial B ?

    asked by sai
  89. Language Arts

    What is a similarity between a haiku poem and a concrete poem?

    asked by Emily
  90. english

    Fix the underlined part in the sentence. This was an important question to Americans in the eighteen century. When they were ruled by Great Britain, and it is an important question today when countries find themselves controlled by more powerful outsiders.

    asked by Please check answers
  91. Math

    The model builder has 4 pieces of balsa wood that are 4 cm,5 cm, 6 cm, and 7 cm in length. How many different combinations of 3 pieces can be used to make triangles without breaking or cutting the pieces? List the combinations as inequalities.

    asked by Lucy
  92. english

    lz help 9. Before he would build a wall, the speaker in “Mending Wall” would want to know (1 point) what he was walling in or walling out. who might be profiting from it. what his family would think of it. how effective it was going to be. ***

    asked by brittany
  93. Math

    Age| Percent of listeners| Degree Measure| 18-24 11% ??????????????

    asked by Alex
  94. Math

    Barbara makes a scale drawing of a statue using the scale 1 centimeter =5 feet. Her drawing measures 12 centimeters tall. Kyle makes a scale drawing of the same statue using the scale 1 centimeter=4 feet. How many centimeters tall is the statue in Kyle's

    asked by Diana
  95. geometry

    the perimeter of triangle B is 6 times greater than the perimeter pf triangle 6. the area of triangle B is how many times greater than the area of triangle A?

    asked by perla
  96. Chemistry

    The temperature of a lead fishing weight rises from 26 C to 38 C as it absorbs 11.3 J of heat. What is the mass of the fishing weight in grams? ( The specific heat capacity of lead is 0.128 J /g C )

    asked by Jess
  97. Math calculus 2

    A propane tank is in the shape generated by revolving the region enclosed by the right half of the graph of (4*x^2)+(64*y^2)=144 and the y-axis about the y-axis. If x and y are measured in meters find the depth of the propane in the tank when it is filled

    asked by Anonymous
  98. Math calculus 2

    Find the volume of the solid generated by revolving the region enclosed by the curves y=5*(sqrt(x)), y=0, and x=2 about the line x=9.

    asked by James
  99. Math calculus 2

    Let S be the region of the xy-plane bounded above by the curve ((x^3)*y)=64, below by the line y=1, on the left by the line x=2, and on the right by the line x=4. Find the volume of the solid obtained by rotating S around (a) the x axis (b) the y axis (c)

    asked by Isabella
  100. Math calculus 2

    Find the volume of the solid generated by revolving the given region about the line x=16: y=4-x,y=0,y=2,x=0.

    asked by Andrew
  101. 6thMath

    You walked 2⁄15 miles from your chemistry class to your economics class at a constant speed of 0.8 miles per hour. How long did this take you?

    asked by PrincessLeaya
  102. Math

    Need some help setting this up. Thank you. A dance studio measures 150 feet by 120 feet. A scale drawing of the dance studio floor measures 10 units by 8 units. What scale was used to create the scale drawing? A) 1 unit: 8 feet B) 1 unit: 10 feet C) 1

    asked by Mark
  103. 6thMath

    Dominique drove home from work at an average speed of 36 miles per hour. If the distance from her house to her workplace is 5.4 miles, how long did her commute take?

    asked by PrincessLeaya
  104. math

    if we have : (x + a)^2 and (x +b)^2 what will be the general form of the square of a binomial B ?

    asked by sai
  105. Chemistry

    If an aqueous solution is 5.08 % by weight in sodium chloride and contains 1.79 g of sodium chloride, what mass of water is present in the solution?

    asked by Beya
  106. chemistry

    calculate the ph of half cell Pt,H2|H2SO4, if its electrode potential is 0.03V

    asked by shambhawi
  107. History

    Which identifies the reason for the rise of imperial powers? Industrialized nations wanted to extract resources from developing nations. European countries wanted to add value to their land-based economy by expanding their territories. Colonial powers

    asked by Quinn
  108. math

    Searches related to what is the answer to Triangle ABC has two sides that measure 12 inches and 16 inches. Which could be the measures of the corresponding sides of a triangle that is similar to triangle ABC? 1. 10 in and 14 in 2. 9 in and 12 in 3. 6 in

    asked by Donna
  109. science

    Which option would guide the thought processes of a scientist? instinct hearsay opinion empirical data D?

    asked by Bri
  110. Math 115

    Create a piecewise function of the following scenario where Upper D left-parenthesis t right-parenthesis is the total distance walked (in miles) as a function of time t (in minutes): “You begin a walk from your home at a fast pace of 3 miles per hour for

    asked by George
  111. Math 115

    Create a piecewise function of the following scenario where Upper D left-parenthesis t right-parenthesis is the total distance walked (in miles) as a function of time t (in minutes): “You begin a walk from your home at a fast pace of 3 miles per hour for

    asked by George
  112. social studies

    what is the preamble to the constitution?

    asked by dd
  113. physics

    A box of mass m rests on a rough, horizontal surface with a coefficient of static friction μs. If a force Fp arrow is applied to the box at an angle θ as shown, what is the minimum value of θ for which the box will not move regardless of the magnitude

    asked by joy