Questions Asked on
October 10, 2015

  1. Calculus

    Sketch the vector field F⃗ (r⃗ )=2r⃗ in the plane, where r⃗ =⟨x,y⟩. Select all that apply. A.All the vectors point away from the origin. B. The vectors increase in length as you move away from the origin. C. All the vectors point toward the

    asked by A
  2. physics

    The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10-8 Ù·m). The light bulb is plugged into a 120-V outlet and draws a current of 2.36 A. If the radius of the tungsten wire is 0.00464 mm, how long must the wire be?

    asked by james small help plz

    During manufacturing of a CIGS device, the metal back contact is deposited first, while in case of the CdTe solar cells, the back contact is deposited in the last processing step. What are the configurations of both cells: a) Both the CI(G)S and CdTe solar

    asked by student
  4. Algebra

    Find the linear function with the following properties: f(0)=1 and the slope of f equals -3/2 THANK YOU

    asked by Christina

    Consider a small module based on interconnected tandem cells of hydrogenated amorphous and microcrystalline silicon as depicted in the figure below. The Voc of a single tandem cell is 1.35V and the short-circuit density Jsc is 12mA/cm2. b)

    asked by student
  6. Math

    which expression is equivalent to 4*4*4*4*4*4*4*4

    asked by john
  7. natural science

    a 500-n diver stands at the end of 4.0-m diving board. the board is attached by two supports 1.5-m apart as shown below. find the tension in each of the of the two supports if the diving board weighs 150-n

    asked by john lloyd
  8. Multi Cultural Psychology

    Imagine an editor asks you to write a journal article about “indigenous psychologies.” This means that your article is likely to be about what? A. Cultural groups understood from “within” with the help of methodologies associated almost exclusively

    asked by Pat
  9. Technical wrtiting

    Internet Source Distortion/Misrepresentation From media,or the Internet, identify an example of each of the following sources of distortion (faulty causal and/or statistical inference) a. A study with questionable sponsorship or motives b. Reliance on

    asked by Amy
  10. Physics

    In a rescue, a 74.1 kg police officer is suspended by two cables, as shown in the figure. Cable A makes an angle θA = 32.0° with respect to the horizontal, and cable B, θB = 74.0°. Sketch a free body diagram. Calculate the tension in cable A.

    asked by Carol
  11. Chemistry

    The equation is: CuSO4(s) + Zn(s) -> Cu(s) + ZnSO4(aq) 3.22 g of powdered zinc is added to 200ml of 0.5M copper sulfate solution. What mass of copper is deposited? Hi guys. I am confused about the stoichmetry question. Q: The equation is: CuSO4(s) + Zn(s)

    asked by G
  12. Chemistry

    A particular vinegar contains 4.0% CH3COOH by mass. It reacts with sodium carbonate to produce sodium acetate, carbon dioxide, and water. How many grams of carbon dioxide are produced by the reaction of 5.00 mL of this vinegar with an excess of sodium

    asked by Faith
  13. sunshine

    Distinguish between instantaneous speed and average speed. A man drives a car a distance of 200km at an average speed of 44kmh-1. What must be his average speed fot the next 220 km if he is to cover the total distances in 9 hours?

    asked by olagunju love
  14. natural science

    a fire fighter who weighs 800n climbs a uniform ladder and stops one third of the way up the ladder. the ladder is 5.0m long and weighs 180n. it rest against a vertical nail, making an angle of 53degree with the ground. find the normal and frictional

    asked by john lloyd
  15. Technical writing

    Effective Writing Teams a. What types of projects require collaboration? b. What are four primary attributes of an effective writing team? Provide an example for each. I don't have anything in my book on this topic. I need help please

    asked by Amy
  16. maths

    Millie, Josh and Libby receive a bonus at work. They are paid in the ratio of 2:3:4 Josh's share is £105. What was the total amount of the bonus before they shared it?

    asked by josh
  17. chemistry

    Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases. What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)2 is mixed with 0.350 L of 0.290 M NaI? Assume the reaction goes to completion.

    asked by jeff
  18. Math

    Question: You are making balloon arrangements for a birthday party. There are 16 white balloons and 24 red balloons. Each arrangement must be identical. What is the greatest number of arrangements you can make using every balloon.

    asked by Anon
  19. American Literature

    In Emily Dickinson's poem, "If you were coming in the fall," why does she not use direct rhyme in the second stanza? If you were coming in the Fall, I'd brush the Summer by With half a smile, and half a spurn, As Housewives do a Fly. If I could see you in

    asked by Emily
  20. Chemistry

    Write the half reactions and the balanced equation for the galvanic cell Cu(s)| Cu2+(aq)|| Cu+(aq)| Cu(s). What is the smallest possible integer coefficient of Cu2+(aq) in the combined balanced equation? When put together the balanced equation is just Cu +

    asked by Alex
  21. pre calc

    The following piecewise function gives the tax owed, T(x), by a single taxpayer on a taxable income of x dollars. T(x) = (i) Determine whether T is continuous at 6061. (ii) Determine whether T is continuous at 32,473. (iii) If T had discontinuities, use

    asked by allexelle
  22. math

    jessie uses 20 liters of gasoline to travel 200 kilometers,how many liters of gasoline will he uses on trip of 700 kilometers?give the direct solution

    asked by jenyrose loberanes
  23. Trigonometry prove need help

    Prove that (1-sinb)/(1+sin2b)=tan^2(45-b) plz the b means beta???

    asked by Collins
  24. Chemistry

    Three colorless solutions in test tubes, with no labels, are in a test tube rack on the lab bench. Lying beside the test tubes are three labels: potassium iodide, KI, silver nitrate, AgNO3, and sodium sulfide, Na2S. You are to place the labels on the test

    asked by Diana
  25. Physics

    A car decelerates uniformly and comes to a stop after 9 seconds. The car's average velocity during deceleration was 45 km/h. What was the cars deceleration while slowing down?

    asked by Joe
  26. MATH!

    Which of the following appears to be an irrational number? A. 3.72727272 B. ã64 C. -6/25 (Fraction) D. .073303330 I think D maybe, but I have no clue

    asked by Taelynn
  27. Business communication

    A final notice collection letter from an appliance manufacturer to an appliance dealer, sent 10 days before initiation of legal collection procedures. Who is the audience?

    asked by Myra
  28. English

    Ethical dilemma or an ethical lapse? Your supervisor has asked you to withhold important information that you think should be included in a report you are preparing. Obeying her could save the company serious public embarrassment, but it would also violate

    asked by Myra
  29. Multi-cultural Psychology

    If a psychologist studies the hidden meanings that people of different countries attach to their birthday greetings, she/he is studying which cultural characteristics? A. Explicit B. Collectivist C. Individualist D. Implicit I think it's C, but not sure

    asked by Pat
  30. Children Development

    Describe three specific examples of changes in your child’s behavior at age 4 that seem to stem from growth in cognitive and language ability since the period of infancy What does this question mean?

    asked by M
  31. Languag

    🔸Identify the complete and simple subject in each sentence. 1- Tapestries often show scenes from history. Answer: complete and simple subject is (Tapestries) 2- Students in our class saw a tapestry at the museum. Answer: complete sub: (Students in our

    asked by Nnn
  32. Algebra

    Suppose a population of bacteria in a Petri dish has a doubling time of 6 hours. How long will it take for an initial population of 11000 bacteria to reach 20000? Round your answer to two decimal places.

    asked by Tim
  33. High School

    What is the IUPAC name of CH3CH(C2H5)CH=CH(C2H5)CH3?

    asked by Izzy
  34. Chemistry

    A backyard swimming pool holds 185 cubic yards (yd^3) of water. What is the mass of the water in pounds?

    asked by Anonymous
  35. Chemistry

    The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0 x 10^-13 cm. The hydrogen atom itself has a radius of approximately 52.9 pm. What fraction of the space within the atom is occupied by the nucleus.

    asked by Anonymous
  36. Intermediate Algebra

    A parcel delivery service has contracted you to design an open box with square base length x cm and height y cm has a volume of 3600 cubic cm. Find the total surface area in terms of x and y. Also determine the dimension for minimum surface area (round

    asked by Ann
  37. Algebra

    Use the rational zero theorem to find all rational zeros, and use those zeros to write f(x) = 2x^4-x^3-9x^2+4x+4

    asked by Arneta
  38. Algebra

    Determine a polynomial function of degree 3 with real coefficients whose zeros are ƒ{2, 1+i .

    asked by Sarah
  39. Physics

    Consider a train that rounds a curve with a radius of 574 m at a speed of 160 km/h. Calculate the friction force on the passenger if the train tilts at an angle of 8.0∘ toward the center of the curve.

    asked by Kaity
  40. math

    Need help figuring out what is the largest amount: 3000 c 400 pt 250 qt 500 gal

    asked by Paul
  41. math

    show that if w is continous on [0,1] and integral wv on [0,1] equal zero then w(x)=0 for x in [0,1]

    asked by assma

    Which of the following would be affected if a soaring eagle changed direction but remained at a constant speed? Acceleration Velocity Both Neither

    asked by Santana
  43. Chemistry

    When 22.3 mL of 1.00 M AgNO3 is mixed with 21.7 mL of 1.50 M NaCl, the temperature of the mixture rises for 21.6 degrees C to 29.7 degrees C. The mass of the aqueous mixture is 45.9 grams and its specific heat capacity is 3.94 J/grams degrees C

    asked by Sarah
  44. Physics

    Two forces act on an object. The first force has a magnitude of 19.0 N and is oriented 58.0° counter-clockwise from the x axis, while the 2nd force has x- and y-components (-25.0 N, 16.5 N). Express the magnitude and direction of the net force.

    asked by Lc
  45. physic

    Between the orbits of Mars and Jupiter, several thousand small objects called asteroids move in nearly circular orbits around the Sun. Consider an asteroid that is spherically shaped with radius r and density 3000 kg/m3 . You find yourself on the surface

    asked by jose
  46. Permutation need help plz

    How many 4 digit codes can we make provided that -the codes contain of numbers only -codes may not equal to 4000 -codes may not be less than 4000 -numbers may be repeated -codes have to be even numbers??????

    asked by Collins
  47. Math

    There are 2015 people sitting at a table, each person belongs to one of the four group: student,professors, presidents and deans. Students hate professors, and will never sit next to them. Likewise for presidents and deans. Explain why, in every possible

    asked by Tianna
  48. Prove also need help

    X/y=z prove that 13/12=2???

    asked by Collins
  49. Pre-Calculus

    For the function f(x)=12x^3+4x^2-27x-9 describe the end behavior. Find the real zeros of f and determine whether the graph crosses or touches the x-axis at each x-intercept. Use the zeros of f and test numbers to find the intervals over which the graph of

    asked by Leizy
  50. English

    Valmy gets a paper from the safe - a paper with a drawing on it. ========================= Is 'a paper' right? Don't we have to use 'a piece of paper'? A piece of paper with a drawing on it?

    asked by rfvv
  51. math

    A commuter has 245 in his commuter savings account. This Account changes by 15 dollars each week he buys a ticket. If the account changed by 240 for how many weeks of tickets did the commuter buy. If the commuter wants to buy 20 weeks of tickets how much

    asked by Yolanda
  52. Maths

    ash catches a train at 10:00, then travels for 200 miles at an average speed of 100 mph. what time does he finish at

    asked by Oscar
  53. Chem

    Depending upon the tip of a dropper pipet, there are approximately 20 drops per milliliter of water. The experimental procedure indicates the addition of 5-10 drops of each solution to the test tubes. Calculate the volume range in milliliters for the

    asked by Robert

    A cart of weight 25 N is released at the top of an inclined plane of length 1m, which makes an angle of 30° with the ground. It rolls down the plane and hits another cart of weight 40 N at the bottom of the incline. Calculate the speed of the first cart

    asked by VIPIN
  55. calculus

    Find the maximum value of the function f(x,y) = 9x2−9xy+y3 on the closed rectangle whose corners are the points (1,1), (1,−1), (−1,1) and (−1,−1)

    asked by Calculus
  56. science

    a body B moving a velocity of 20m/s collid with anothet body A moving in the same direction on the same horzontal line with a velocity of 10m/s, if the of body A is three time the same of body B and the collion perfectly elastic calculate the velocity of A

    asked by manbud
  57. Physics

    A container holds 1.9 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.0x10-3 kg bullet with a speed of 960 m/s. What is the Kelvin temperature of the gas? do I use the formula? T=

    asked by james
  58. English

    1. We have to motivate our customers to buy our products. 2. We have to ask our customers to buy our products. ========================== Do the two sentences have the same sentence pattern? In sentence 1, is 'to buy our products' an object complement as

    asked by rfvv
  59. Idk

    For whom do members of the JVC Work?(help its for church homework and it says for a part to look it up in the Internet)

    asked by Splat
  60. math

    Use implicit differentiation to find dz/dx if 𝑒^z = 𝑥𝑦𝑧

    asked by Megameno
  61. Math

    In a favorable habitat and without natural predators, a population of reindeer is introduced to an island preserve. The reindeer is introduced, F(t), t as the year after their introduction is modeled by the poly function F(x)=-0.125t^5+3.125+4000. 1. What

    asked by Fox
  62. optional math

    In the given figure, ABCD is a trapezium where AB // DC. P & Q are the midpoints of AC & BD. Prove that: Vector PQ= 1/2(Vector AB - Vector DC).

    asked by math
  63. Solar

    Greeting All, please assist with the below. Thanks. The spectral power density of a solar simulator is given by: P(λ)=7.5∗1015λ−2.25∗109 [Wm^-2m^-1] for 300nm

    asked by G2015
  64. Probability i need help

    In a form 1A class there are 25 boys and 20 a form 1B there are 20boys and 15girls.A learner is choosen at random from each class.find the probability that (a):both learners are boys (b):the choosen learners are of different sexes????

    asked by Collins
  65. History

    Check my homework? Choices: A. Barbed-wire fences, B. windwills, C. steel plows, D. McCormick Reaper, E. railroads Question: Life on the prairie was difficult for everyone. But there were ways to succeed. Match the problems homesteaders faced with possible

    asked by Andy
  66. Calculus i need help

    Find dy/dx if x^2.y+sin(xy)+y^4.x^2+3xy=5???

    asked by Collins
  67. Physics

    You can shoot an arrow straight up so that it reaches the top of a 25-m-t building. (a) How far will the arrow travel of you shoot it horizontally while pulling the bow in the same way? The arrow starts 1.45 m above the ground.(b) Where do you need to put

    asked by K
  68. D P S dehradun

    Plz calculate area. A-B=28.9 yard. B-C = 33.11 yard. C-D== 30.1 DA= 36.2 yard

    asked by Uma
  69. History

    Check my homework? Choices: A. Barbed-wire fences, B. windwills, C. steel plows, D. McCormick Reaper, E. railroads Question: Life on the prairie was difficult for everyone. But there were ways to succeed. Match the problems homesteaders faced with possible

    asked by Andy
  70. English/Poetry

    Hi! So, I'm learning about Iambic Pentameter in class and i'm very confused. I'm supposed to pick a song and figure out the pentameter. However, I'm not sure if the song I chose, American Pie by Don Mclean, even has one. Like when I look at the first

    asked by Larry
  71. woodlands

    Which career path can I follow with the following subjects economics life sciences geography and mathematical literacy

    asked by kayla
  72. maths

    Q vertical pole and a tower are on the same level Ground.from the top of the pole angle of elevation of the top of the tower is 60 degree and the angle of depression od foot of the tower is 30 degree.find the height of the tower if the height of the pole

    asked by ashwini
  73. science

    what is necessity of proper cleaning ? sanitation and spraying disinfectants in poultry farms?

    asked by shehzad
  74. precalculus

    find the values of the requested trig functions using the given value and quadrant in which the point corresponding to the angle lies. quadrant II; sinθ=4/5 find cosθ and tan θ

    asked by glen
  75. math

    when a third of a certain number is added to 8,the result is more than 10.what is the number?

    asked by amadu
  76. How many of these number maths??

    (a):how many digit number can be formed with the digit 2,2,2,3,3,4,5 (b):how many of these are greater than 3400000 (c):how many are greater than 3400000 and are divisible by 5 (d):how many are greater than 3400000 and are even ????

    asked by Collins

    what digital cameraS use for photoshoot?

    asked by Sam
  78. physics (Compton effect)

    need helppp. Find the energy of an x-ray photon that can impart a maximum energy of 50 keV to an electron by Compton collision. Max energy being Kinetic Energy? do I just plug the 50*10^3 eV (convert to J) into the E=h (c/lambda) equation?? We are not

    asked by paul
  79. Calculus

    what is the limit as h approaches 0 of ((x+h)^pi-x^pi)/h? Multiple choice answers: A: lnx B: lnx (x^pi) C: Pi lnx D: (pi^2) ln (x^2) E: (pi^x) lnx I know this is d/dx x^pi, or Pi x^(Pi-1)

    asked by Henry
  80. Math Calculus

    Postal regulations specify that a package sent by certain shipping methods may have a combined length and girth of no more than 99 inches. Find the dimensions of a CYLINDRICAL package with the greatest volume that may be sent by this shipping method. HINT*

    asked by Heather
  81. trig

    1) given cotθ = 1/2√7, find sinθ and cosθ in quadrant I 2) given tanθ = √5, find secθ and cotθ in quadrant III

    asked by coco
  82. Math

    Eli has two 8 1/2 pounds of bags of mints. She plans to put 1/2 at each place setting. Will she have enough mints?

    asked by Sammy

    Four environmental issues that cause ill-health to your community

    asked by MBALENHLE
  84. maths

    Rosie is training for the next football match. She runs around a circular track with a radius of 60 metres. Use π = 3.14 and C = π d How far has Rosie run?

    asked by josh
  85. math

    Of the set -5,,5,-3,8 which two numbers have the same absolute value? explain

    asked by tracy
  86. maths

    marc is looking at the plans for his new garage. the length of the garage is 8 metres. the scale of the drawing is 1:50 what will the length of the garage be on the drawing? which would be the most simplistic form for me to work this out, i really struggle

    asked by josh
  87. Geometery i need help

    A rubber band is use to tie 9 oranges of diameter 8mm.if the band just touches 8 oranges .find the lenght of the band??

    asked by Collins
  88. math

    Of the set -5,,5,-3,8 which two numbers have the same absolute value?

    asked by tracy
  89. Math-6/7

    Eli purchases a container of punch that when mixed with water, makes 640 ounces of punch. Eli has 8 ounce drinking glasses. She assumes that each person will drink 2 glasses of punch. How many people can be served with one container if punch? I said 640

    asked by Versace
  90. physics

    the velocity of a particle moving along the axis is given for t>0 by v=(32t -2t^3 ) m/s where t is in s what is the acceleration of a particle when (after t=0 ) it achieves its maximum displacement in the positive x direction

    asked by nada
  91. Physics i need help i have exams next weeks that is why i post the question that which i cannot do

    The cost C of running a ship on a certain voyage is said to be given by c=av+b/v where v is the average speed in km/h and a,b are constant.find the value of v in terms of a and b to give the maximum cost,and also find the cost???

    asked by Collins
  92. English

    Write the noun that is the simple subject. 1/ The red color of my sweater looks good with the bracelet. Answer: color. 2/ Some members of my family also enjoy stringing beads. Answer: family. 3/ This beaded necklace is one of my favorite pieces of jewelry.

    asked by Joj
  93. Calculus

    (x^2+y^2)^2=16y Find all values of x where the tangent line is vertical I found the derivative and looked for where it was undefined but it didn't work

    asked by Henry
  94. MATH

    You would like to construct a 400-square-foot rectangular garden along your driveway. The fencing on the driveway side costs $15 per linear foot, while the fencing for the other three sides costs $8 per linear foot. Write an expression for the cost of the

    asked by TAN
  95. Math

    In a figure, the radius of the inner circle of the tire is twice the width of the tire itself. To the nearest integer, what percent of the entire area is the area of the tire? My teacher told me the answer is 56%, by rounding the 55.5555...., but I don't

    asked by Jackson
  96. math

    60 is 166 2/3% of what number?

    asked by Jake
  97. Science

    Hi I've read everything and searched everything and I can't find the answer to this question so... How is iodine-131 and iodine-126 similar and how is it different? Thank you this is stressin me out!

    asked by ASHLEY
  98. Georgia History

    which of the following effects of the french and indian war most contributed to smuggling in the colonies? increased taxes from the crown enforcement of the navigation acts presence of british soldiers in the colonies removal of the spanish from flordia

    asked by john
  99. trig

    given cotθ = (1/2) √7, find sinθ and cosθ in quadrant I cotθ = x/y would 1/2 be the x and √7 be the y?

    asked by coco
  100. calculus

    Identify any intercepts, relative extrema, points of inflection, and asymptotes. y = 4x^2 − 24x + 34 X-intercept ? (x, y) (smaller x-value) (x, y) (larger x-value) relative minimum (x, y)

    asked by akash
  101. History

    Could someone please check my History questions? Any help will be greatly appreciated! My answers are under the question... 1) Which characteristic is most commonly associated with the westward expansion of the United States? A) Industrialism B)

    asked by Abby
  102. calculus

    Identify any intercepts, relative extrema, points of inflection, and asymptotes. (If an answer does not exist, enter DNE.) y = x^3 + 3x^2 + 3x + 2 x-intercept (x, y) = y-intercept (x, y) = relative maximum (x, y) = relative minimum (x, y) = point of

    asked by akash
  103. Msth

    Please check my work: Label the dependent and independent vstiablr. 1. Time spent studying and Score on a test 2. If a scientist conducts an experiment to test the theory that a vitamin could extend a person's life expectancy. What are the dependent and

    asked by Katie
  104. calculus

    y = x^2 − 9x + 29/x − 5 relative maximum (x, y) = relative minimum (x, y) =

    asked by akash
  105. AP Chem

    Hey guys! Stuck on some pH problems! Thanks so much in advanced: A) Calculate the pH of a 0.200 M solution of potassium acetate, KCH3CO2, in water at 25 °C. At this temperature, Ka = 1.76 × 10-5 for acetic acid. 1. 2.73 2. 5.45 3. 9.02 4. 9.94 5. 10.16

    asked by Allie
  106. Chemistry

    * From your hint, I arrived at an answer of 3.46 x 10^4 but the answer key says 3.11 x 10^5 Ib. A backyard swimming pool holds 185 cubic yards (yd^3) of water. What is the mass of the water in pounds? DrBob222: 185 yd^3 x (3 ft/yd) x (3 ft/yd) x *3 ft/yd)

    asked by Anonymous
  107. physics

    in the compton scattering event, the scattered photon has an energy of 120 keV and the recoiling e- has an energy of 40 keV. Find the wavelength of the photon.

    asked by paul
  108. Math

    A parallelogram has an angle of 50 degs and sides of 5 and 10 inches. What are the lengths of the diagonals? Round each to the nearest tenth of an inch.

    asked by Anonymous
  109. calculus

    Show that sinh (sinh^-1 x) = x

    asked by ligas
  110. math

    1.)The difference of two natural number is 6, and the diffrence of their reciprocals is 1/36. Find the two numbers. 2.)In a river, ben found out that he could go 16miles downstream and then 4miles back upstream in a total of 48mins. What was the speed of

    asked by Ange Ords
  111. algebra

    15 less than one-ninth of P

    asked by lisa
  112. pre calc

    Use mathematical induction to prove that the statement is true for every positive integer n. Show your work. 2 is a factor of n2 - n + 2

    asked by allexelle
  113. Math-Sorry I had a mistake in the first problem.

    Please check my work: Label the dependent and independent variable. 1. Time spent studying and Score on a test 2. If a scientist conducts an experiment to test the theory that a vitamin could extend a person's life expectancy. What are the dependent and

    asked by Katie
  114. pre calc

    A statement Sn about the positive integers is given. Write statements S1, S2, and S3, and show that each of these statements is true. Show your work. Sn: 2 is a factor of n2 + 7n

    asked by allexelle
  115. pre calc

    The Fiedler family has up to $130,000 to invest. They decide that they want to have at least $40,000 invested in stable bonds yielding 5.5% and that no more than $60,000 should be invested in more volatile bonds yielding 11%. How much should they invest in

    asked by allexelle
  116. physics, please help

    An object of mass m can slide without friction on a tabletop. A horizontal string tied to the object passes through a frictionless hole in the table and is connected to a second, hanging mass, M. If m is put into motion so that it moves in a circular path

    asked by johnny