Questions Asked on
October 12, 2017

  1. Physics

    A typical photovoltaic cell delivers 4.2×10−3 W of electric energy when illuminated with 0.15 W of light energy. What is the efficiency of the cell?

    asked by benjamin
  2. PreCalc

    QP is (x y) = (3 -1) + r (14 10) QR is (x y) = (3 -1) + s (17 -9) PR is (x y) = (0 18) + t (5 -7) where r, s, and t are scalars. 1. Use vector methods to find the coordinates of P, Q, and R. 2. Find vectors PQ and PR and evaluate PQ*PR 3. Find size of QPR

    asked by John
  3. Algebra

    Simplify. Complex Fractions. b-2b/b+3/1/b+3+1/b-3= LCM: (b+3)(b-3)

    asked by Keonn'a
  4. Chemistry

    In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final

    asked by Nick
  5. Maths

    A building, B, is observed from two points P and Q which are 250 m apart. The angles PQB and QPB are found to be 67 degrees and 73 degrees respectively. What is the distance, to the nearest metre, of P from the building?

    asked by Jay
  6. Science

    3.365*10^5 to 3

    asked by Areej
  7. History

    Which religion was prominent to much of North Africa in the early 1800s?

    asked by Dan
  8. Chem

    20.6 gm NaBr solved in 500 ml of water. What will be the molarity of solvent. Where Na 23 n Br 80

    asked by Aarush
  9. Math

    A square garden has an area of 65 square meters.The lenght of a side is between which two measurements?

    asked by Lezela
  10. math

    Meg's pension plan is an annuity with a guaranteed return of 3% per year (compounded quarterly). She would like to retire with a pension of $50,000 per quarter for 5 years. If she works 21 years before retiring, how much money must she and her employer

    asked by patrick
  11. Biology

    What are the possible allele combinations that could occur in a gamete produced by an individual who is heterozygous for the traits of flower color and height?

    asked by Anonymous
  12. physics

    A dog running in an open field has components of velocity vx = 2.5 m/s and vy = -1.3 m/s at time t1 = 10.7 s . For the time interval from t1 = 10.7 s to t2 = 23.2 s , the average acceleration of the dog has magnitude 0.54 m/s2 and direction 25.0 ∘

    asked by Noora
  13. English

    1. Make your voice louder. Your voice is too soft. 2. Make your voice high. 3. Make your voice up. 4. ______________________ 5. Speak up. They can't hear you clearly. 6. Raise your voice in reading the text. I can't hear you clearly.

    asked by rfvv
  14. problem solving in RAE

    What is the area of a rectangle whose length is 1 unit longer than its width and whose diagonal is 2 unit longer than the width?

    asked by Jee-Anne
  15. math

    The lunch bill for the 7 guests came to $154. If Jessica paid for 3 of the guests and Aaron paid for the other 4 guests, how much did each pay?

    asked by jasmine
  16. problem solving in RAE

    What is the product of 3 consecutive even integers if the middle integer is x?

    asked by Jee-Anne
  17. PreCalc

    QP is (x y) = (3 -1) + r (14 10) QR is (x y) = (3 -1) + s (17 -9) PR is (x y) = (0 18) + t (5 -7) where r, s, and t are scalars. 1. Use vector methods to find the coordinates of P, Q, and R. 2. Find vectors PQ and PR and evaluate PQ*PR 3. Find size of QPR

    asked by John
  18. Algebra, Trig

    You are standing at a base of a Ferris Wheel which is 4 m above ground while your friend is riding. The Ferris Wheel is 8m in diameter. Describe how the shape of the sine curve models the distance your friend is to the platform you are on. Identify the

    asked by Jay
  19. World History

    In this discussion, you will rank the three individuals from the lesson who you feel most contributed to modern Western society. You will cite two pieces of evidence from the lesson per individual to explain and support your ranking. Help meh please

    asked by Anon
  20. English

    1. Will you make your voice higher than usual? 2. I want you to make your voice loud so that the others can hear you clearly. 3. Can you make your voice clear and loud? 4. Can't you read the sentences out loud? 5. You need to read the part as loudly as

    asked by rfvv
  21. world history

    What did young men learn in Aztec public schools? Select all that apply.

    asked by annie
  22. world history

    What was the penalty for gossip in Aztec society?

    asked by annie
  23. world history

    Where were the Aztecs told to build their capital?

    asked by annie
  24. world history

    In Aztec society, women were (Choose all that are correct).

    asked by annie
  25. Physics

    During the S.H.M of simple pendulum, when the bob comes back to its mean position, the displacement gradually decreases, and eventully becomes zero at the equilibrium position, while it is said that its velocity is still maximum despite of zero

    asked by Ubaid ullah hasan
  26. Maths

    Ankit sold two jeans for ₹990 each .on one he gains 10% and on other he lost 10% . find his gain or loss percent on whole transaction.

    asked by Rahul kumar
  27. Geography

    All of the following are the result of the increase in large-scale, green revolution agriculture in the region, except: A. more than 2 million small farmers have been forced to sell their land in Brazil alone since 1985. B. there has been an increase in

    asked by Jake
  28. Algebra (Please help!)

    Hey! I've been having a lot of trouble with this, please help! x - 7 > 10 x > __ 3x < 20 (underscore under the less / greater than sign) x < __ 5a - 2 < 8 a < __ 2t + 8 > 4(t + 1) (underscore under the less/greater than sign) t > __

    asked by Carolyn
  29. Math

    Help meh please Check my answers I suck at dis 1. 4y+3≤y+6 Answer=y≤3 2. -2y>2 Answer=y

    asked by Memes
  30. Educational Technology

    PLZZZ HELP!! What is the best way to describe how your voice should sound when you read a story out loud? • monotonous, unvaried pitch • monotonous, unvaried speech • loud and slow to accommodate users with poor speaker quality • varied tone of

    asked by Reagan
  31. Scocal studies

    Which of the following statements best characterizes the English colony of Roanoke? A. The colonies failed because the settlers wanted to join the Indian tribes as missionaries B. The settlers became wealthy and return to England * C. The settlers enlisted

    asked by PLEASE HELP ME
  32. MATH

    GIVEN THAT X=2/3 AND Y =1/5 FIND THE VALUE OF X/Y

    asked by NOREEN MALUNGA
  33. Educational Technology

    Which of the following statements is true? • a narrative essay should not include a dialogue • a narrative essay can include a dialogue and should include descriptive language*** • a narrative essay should only be told in third person • a narrative

    asked by Reagan
  34. World History

    In this discussion, you will rank the three individuals from the lesson who you feel most contributed to modern Western society. You will cite two pieces of evidence from the lesson per individual to explain and support your ranking. Help meh please

    asked by Anon
  35. Physics

    Water is lifted out of a well 30.0m deep by a motor rated at 1.00hp. Assuming 90% efficiency, how many kilograms of water can be lifted in 1 min? Answer is 137kg but can not figure it out.

    asked by Kayla
  36. MATH

    find the mean of the data set: 9 4 7 3 10 9

    asked by yanna
  37. math

    find each sum or difference 1. -1/2 + 1/3 1. -1/6 2. -1/3 3. 2/3 4. 1/6 I got 2/3 because I added the 2 numerators and got 2 then I kept the LCM as the denominator so I got 2/3. 2. -3 1/5 + -6 1/2 1. -3 2/7 2. -3 7/10 3. -9 2/7 4. -9 7/10 I got number 3

    asked by { Alice} please helppp
  38. Math

    A 16 ounce box of cereal costs $4.00. How many cents per ounce does cereal cost?

    asked by Gabby
  39. Math

    Cost of 4 books and 5 pens is 32 and cost of 5 books and 4 pens is 31 then find the cost of 1 book B=?

    asked by Ehtisham rajput
  40. Biology

    A stock protein sample that has a concentration of 250.0mg/ml. You need to dilute this sample to 20.0 mg/ml in buffer. The final volume of the diluted solution is 5.0ml. how much of the stock protein solution and buffer are required to achieve this? Answer

    asked by Matthew
  41. social studies

    what resulted from the loss in value of the constitution of the continental dollar?

    asked by Nbutter
  42. math

    Which transformations take f(x)=3x+1 to g(x)=−3x-5 ? I think A Question 1 options: a reflection over the y-axis and a translation 4 units up a reflection over the y-axis and a translation 4 units down a reflection over the x-axis and a translation 4

    asked by ttng
  43. Geometry

    What is the length of the hypotenuse of a right triangle with legs of lengths 9 in. and 40. A. 41 B. 49 C. 840.5 D. 1,681 I believe it is A, because 9^2 is 81 and 40^2 is 1681 and when you find the perfect square of that it's 41. Am I right?

    asked by Anon
  44. math

    Find the slope of the line that goes through the points (-6, 3) and (2, 3).

    asked by Rachel
  45. math

    Find the midpoint of the line segment with endpoints (3, 10) and (–1, –16)

    asked by Rachel
  46. Math

    A biologist has 40% solution and 10% solution of the same plant nutrient. How many cubic centimeters of each should be mixed to obtain 25 cc of 16% solution?

    asked by Haley
  47. science

    the position of a particle moving along x-axis is given=5t^2-10t the distance travelled by particle is

    asked by noyf
  48. math

    HOW MANY SMALL SQUARES WITH A SIDE LENGTH OF 1/2INCH WILL FIT INTO A 2 INCH SQUARE? THE TEACHER SAYS 16 I THINK 8 2 INCH SQUARE WOULD BE: 1INCH * 2 INCH = 2 SQUARES * 4 SQUARES please help!!!!!

    asked by Shachar
  49. Chemistry

    Describe how to prepare a 500cm3 solution of 0.2moldm-3 sodium trioxocarbonate(iv) Give the Apparatus,Method, Theory, Conclusion and precautions.

    asked by Favour
  50. PreCalc

    The “Hatch Shell” in Boston has the arch with semi-elliptical form with a horizontal major axis. The base of the arch is 110-foot long and the highest part of the arch is 40 feet above the scene. Find the height of the arch of the “Hatch Shell” 33

    asked by Jake
  51. Math

    The major axis of the ellipse lies on the line y=3 and has length 6; the minor axis lies on the line x=–4 and has length 4;

    asked by Marie
  52. English

    What are some situations where levity is out of place??

    asked by Ahlume
  53. Math

    According to these data, the mean time students spent on the exam was 94.1 minutes, and the standard deviation was 24.23 minutes. Suppose the exam proctor realized after compiling these data that he had used the wrong start time in his calculation, so that

    asked by Marquita
  54. math

    The length of a rectangular swimming pool is 24m more than twice its width. The perimeter of the pool is 108m. Determine the dimensions of the pool.

    asked by Variable
  55. Math

    The height of the solid cone above is 18 inches and the radius of the base is 8 inches. A cut parallel to the circular bas is made completely through the con so that one of the two results is smaller cone. If the radius of the base of the small cone is 2

    asked by Mayyyy
  56. Math

    The following data give the number of keyboards assembled at the Twentieth century electronics company for a sample of 25 days. 45, 52, 48,41,56,46,44,42,48,53,51,53,51,48,46,43,52,50,54, 47,44,47,50,49,52 a.calculate the values of the three quartiles and

    asked by Marquita
  57. Math

    Of the students in a certain classroom, 9 are in the school play, 12 are in the orchestra, and 15 are in the choral group. If 5 students participate in exactly 2 of the 3 activities and all other students participate in only 1 activity. How many students

    asked by Samuel
  58. Math

    Write a comparison sentence yo represent this equation. 6×7=42

    asked by Mia
  59. math

    ABCD is a square and P, Q are the midpoint of BC, CD respectively .if AP =a and AQ=b, find in terms of a and b , the directed line segments (i) AB, (ii) AD , (iii) BD and (iv) AC

    asked by seth
  60. Algebra

    S is the set of real numbers that are less than 15 A) 0 < s < 15 B) {s/s < 15} C) {s/s

    asked by Heyo
  61. math

    d = mt + b Isolate for M

    asked by Variable
  62. math

    During the winter it snows 3 out of every 10 days what is the probability that it will snow, in any given week 7 days, more than 3 times?

    asked by josh
  63. math

    Re arrange the formula C = 15n + 250 to express N in terms of C

    asked by Variable
  64. math

    7^2 + 24^2 =??? Please someone help!!!!!

    asked by bob
  65. History

    During the Renaissance, the philosophy of humanism swept through Europe (1). Humanism resulted in advancements in art, science, and education (2). Humanist ideals also mimicked ancient Egyptian government structures (3). Humanists believed in the idea of a

    asked by malia
  66. math

    After years of teaching, I can say (with 100% made up certainty) that the average number of questions the typical student can complete per minute is 5.  If I choose any student at random (I'm looking at you), what is the probability that yo...er that

    asked by josh
  67. History

    Which accurately describe ideological differences between Catholicism and humanism during the Renaissance? (Select all that apply.) catholicism promoted the individual as the center of existence, whereas humanism promoted god as the center of existence

    asked by malia
  68. Math

    A snack mix contains toasted oat cereal, pretzels, and nuts in a ratio of 2:2:1 by mass. What mass of each ingredient is needed to make the following amounts of snack mix? a)330g b)210g c)500g d)750g

    asked by Emily
  69. History

    The Renaissance positively impacted education in Europe (1). During the Renaissance educational methods changed from passive rote recitation to active analysis (2). Advancements in education spread literacy and led to new innovations and knowledge (3). In

    asked by malia
  70. mte

    Find the slope of a line parallel to the line through the given points. (-5,-5) and (6,2)

    asked by Anonymous
  71. math

    at a supermarket, pineapple juice sells at $1 per pint (16 oz). Greg wants to buy eighteen 40-ounce cans of pineapple juice from the supermarket. How much does he has to pay altogether.

    asked by teresa
  72. Math

    Two cars are 30 miles apart and moving toward each other on the same highway. One car is going 10 miles per hour faster than the other. How fast is each of the cars going if they pass each other 15 minutes later?

    asked by Glenn
  73. Math

    Professor Beaker has a 50-milliliter solution containing 60% acid. How many milliliters of pure water should he add to this solution to produce a solution containing 40% acid?

    asked by Glenn
  74. Social Studies

    What is article 2 in the constitution about?

    asked by School123
  75. Living environment

    Why are there some common organelles across all cell types and how is that related to their functions? Why do some cells have specialized organelles and how is that related to their functions?

    asked by Anonymous
  76. 5th grade LA

    Identify the preposition. 1. He was bitten by the dog with the red collar. a: by, with 2. Take the fire escape on the side of the building. a: on, of 3. He brushed his hair with the brush from the dollar store. a: with, from 4. The robot with the mohawk

    asked by Jared
  77. Math

    Mr.stein is purchasing 2.25 pounds of meat that vists$2.80 per pound.How much change should Mr.stein receive if he gives the cashier $20.00 F. 6.30 G 13.70 H 14.95 J. 2.52

    asked by Edith
  78. Chemistry

    Find the equilibrium constant for the following reaction: D-Glucose (aq) 2L (+) lactic acid (aq) ΔG ° for D-Glucose= -914.5kJ/mol ΔG ° for lactic acid = -538.8kJ/mol Would I just use the ΔG° =-RTlnK?

    asked by Heidi
  79. english

    . Identify the sentence that is correctly punctuated. a. Word Processing and Excel: those are the technology job requirements. b. Word Processing, PowerPoint, and Excel, those are the technology job requirements. c. Word Processing and Excel; those are the

    asked by steve
  80. Physics

    On vacation, your 1400-kg car pulls a 560-kg trailer away from a stoplight with an acceleration of 1.85 m/sz. (a) What is the net force exerted on the trailer? (b) What force does the trailer exert oc the car? (c) What is the net force acting on the car?

    asked by Kristi
  81. Social Studies

    What was Alexander Hamilton’s main reason for insisting that all the nation’s debts must be paid in full?

    asked by help
  82. History

    What best describes the outcome of the Spanish Inquisition? christian armies defeated Muslims for control of Spain muslims defeated Christians armies for control of Spain the holy roman empire defeated the Visigoths for control of Spain Visigoths defeated

    asked by malia
  83. english

    Mr. ________ profit-and-loss report is due tomorrow. a. Jones’s b. Jones’ c. Joneses’ d. Jones

    asked by steve
  84. english

    Carolyn was thrilled when she found out her new employer offers two ________ vacation time. a. week’s b. weeks c. weeks’ d. week

    asked by steve
  85. Math

    How many squares with sides that are 6 inches long are needed to cover a square with a side length of 30 inches without overlaping?

    asked by Noah
  86. English

    Describe one of the strongest literary images (not a picture or drawing from the reading) you encountered from any of the following literature: • from Of Wolves and Men by Barry Holstun Lopez • from “An Inconvenient Truth” by Al Gore • "The

    asked by Sav
  87. english

    Choose the correct sentence. a. Him and I went through a lot together. b. My boss asked my coworker and I to stay late. c. Jennifer stormed out of the house and slammed the door because she and her mother got into an argument. d. Who should I send this

    asked by steve
  88. History

    where did humanism originate from?

    asked by malia
  89. Algebra and Geometey

    Hi can someone explain what is meant by the inverse of a transformation

    asked by Katherine
  90. History

    What was a prevailing characteristic of Renaissance architecture? renaissance architecture followed classical Greco-roman design renaissance architecture used a Byzantine-style known as Romanesque renaissance architecture included building decorated with

    asked by malia
  91. Spelling

    What is a synonym for a 'car at the head of the train'? (Has to have six letters and the 'J' sound in it)

    asked by Do I have to tell you?
  92. History

    Which accurately describe scientific advancements during the Renaissance?  (Select all that apply.) invention of the printing press invention of the microscope invention of the telescope invention of the steam engine i think its a,b,c

    asked by malia
  93. Socioloy

    Why is the 1970s considered to be a decade of change for the American media?

    asked by Jake
  94. math

    what is the property of 7(2-p)=14-7p

    asked by bob
  95. Subject

    What is a synonym for something you use with a credit card?(has to end with an E and have the "J" sound)

    asked by Hi
  96. Math

    what property is 7(2-p)=14-7p Can you please answer this question ASAP please?

    asked by skylar
  97. Math

    How would I write and solve a subtraction problem that involves regrouping and includes Ted having $304 in savings

    asked by Aiden
  98. Spelling/Language Arts

    What word means "To overpass across water?" It has to have the J sound.

    asked by Zoey
  99. Chemistry

    If E=hv and h is joules per second and v is waves per second, the end unit is J/s^2, but E can only be Joules, not s^2. How do I fix this?

    asked by Lauren
  100. chemistry

    Hydroselenic acid in formula form is H2SeO4?

    asked by Kevin
  101. math!:D

    which set represents pythagorean triple? A.27,38,42 B.33,44,55 C.35,38,42 D.68,72,81 Someone please explain the answer??

    asked by Pre A
  102. P.E

    The right amount of exercise in a day someone should do is: ???? A. 10 minutes B 1 hour C 30 minutes D 1 hour and 45 minutes I think it's 1 hour? that's what my friends do . . .

    asked by Person who wants help from people
  103. Math

    An 85-year-old woman in Rotorua, New Zealand, won't have to pay her library fine. A book she borrowed from the local library in 1945 was found during a move. Based on the borrowing rules pasted inside the front cover of the book, the fine should have been

    asked by Jesse
  104. Math helppp

    The area of a playground is 64 square yards. The length of the playground is 4 times longer than its width. How can I solve this?

    asked by Jessica
  105. algebra

    Tickets to a sporting event cost $6 for children and $8 for adults. The total revenue from the tickets sold was $2340. There were 320 total tickets sold. How many children’s tickets were sold?

    asked by Brooke
  106. Chemistry

    If 17.0 g Al reacts with 25.0 g O2, how much excrsss reagent will remain? 4Al + 3O2 —> 2 Al2O3

    asked by Anonymous
  107. La

    In this discussion, you will talk about belonging to a place and of the information, or understandings, that belonging involves. What must people know or understand about a place in order to belong there? How do they gain that knowledge or understanding?

    asked by guess who
  108. math

    what is the GCF or greatest common factor of 18,27,30

    asked by Keira
  109. Physics

    The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road is 45.0 km/h and the intersection is 23.0 m wide. A car is traveling at the speed limit in the positive direction and can brake

    asked by Mariam
  110. Physics

    The United States and South Korean soccer teams are playing in the first round of the World Cup. An American kicks the ball, giving it an initial velocity of 3.6 m/s. The ball rolls a distance of 5.0 m and is then intercepted by a South Korean player. If

    asked by Mariam
  111. Physics

    A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 2.10x10^-2 s, but in that time it goes from rest to a velocity of 4.00×10^3 m/s.

    asked by Mariam
  112. Physics

    A sailboat is moving across the water at 3.0 m/s. A gust of wind fills its sails and it accelerates at a constant 2.0 m/s2. At the same instant, a motorboat at rest starts its engines and accelerates at 4.0 m/s2. After 3.0 seconds have elapsed, find the

    asked by Mariam
  113. Maths

    The distance between aerodromes A and B is 1000 Nautical Miles. At 09:00 an aircraft leaves for B with a speed of 300 Nautical miles per hour. At 09:30 another aircraft leaves for B from A with a speed of 400 Nautical miles per hour. At what approximate

    asked by Mithun raj