Questions Asked on
March 26, 2017

  1. Chemistry

    How much heat does your body lose when 3.05 g of sweat evaporates from your skin at 25 ∘C? (Assume that the sweat is only water.) The heat of vaporization of water at 25 ∘C is 44.0 kJ/mole. Answer: 3.05g H2O*1mol/18.015gH2O= 0.169mol H2O

    asked by Baonhia Vang
  2. Chemistry

    Given H2(g) + (1/2)O2(g) ---> H2O(l), dH = -286 kJ/mol, determine the standard enthalpy change for the reaction 2h2O(l) ---> 2H2(g) + O2(g) 2H2O(l) ---> 2H2(g) + O2(g) H2(g) + (1/2) O29g) ---> H2O (l) : dH = -286 kJ/mols 2H2O(l) ---> 2H2(g) + 2O2(g) :

    asked by AJ
  3. Chemistry

    When .560 g of Na(s) reacts with excess F2(g) to form NaF(s), 13.8 kJ of heat is evolved at standard-state conditions. What is the standard enthalpy of formation of NaF(s)? Start off by balancing the equation: 2Na(s) + F2(s) ---> 2NaF(s) Then make it for

    asked by AJ
  4. maths

    i have tens ones and digits are next door numbers and they add up to9 what number am i

    asked by michael
  5. Physics 2

    a point charge q1=+9μc is held fixed at the origin. A second point charge with a charge of-5μC and mass of 3.2 x 10^-4 kg is placed on the + x-axis, 0.90 m from the origin. a.) What is the potential energy of the pair of charges? (consider the potential

    asked by Jd del rosario
  6. Math

    Assume the carrying capacity of the earth is 9 billion. Use the 1960s peak annual growth rate of 2.1​% and population of 3 billion to predict the base growth rate and current growth rate with a logistic model. Assume a current population of 6.8 billion.

    asked by Sarah
  7. Chem

    Calculate the standard enthalpy change for the reaction: 2C8H18(l) + 17O2(g) --> 16CO(g) + 18H2O(l) Given: 2C8H18(l) + 25O2(g) --> 16CO2(g) + 18H2O(l): ∆Hº = -11,020 kJ/mol 2CO(g) + O2(g) --> 2CO2(g): ∆Hº = -566.0 kJ/mol

    asked by Anon
  8. Math

    If two cylinders are similar, find the scale factor of the smaller figure to the larger figure. The surface area of the smaller area is 20 pi yards squared. The surface area of the larger cylinder is 125 pi yards squared. No radius or height is given, and

    asked by Emma
  9. physics

    Consider a ladder placed against a frictionless wall. What happens to the friction force between the ladder and the floor as you climb up the ladder? (Assume the ladder is not sliding.) A. The friction force decreases. B. The friction force remains the

    asked by Idali
  10. Science

    Three abiotic factors of about eastern himalaya

    asked by Emerson
  11. Precalculus

    Write a polynomial function of minimum degree in standard form with real coefficients whose zeros and their multiplicities include those listed. 3(multiplicity 2), 5+i(multiplicity 1)

    asked by Anonymous
  12. Math

    You purchase a life insurance premium for​ $250 annually. The probability of a claim is 0.001 for your age bracket. The policy is worth​ $50,000. What is your​ gain/loss that​ year?

    asked by Sue
  13. AP physics (multiple choice)

    an object is undergoing uniform circular motion. which of the following statements is true? a. the velocity is constant b. the acceleration is constant. c. the a is constant but v varies. d. the v is constant but the a varies. E. both a and v vary.

    asked by Anthony
  14. music 394

    What is ''American'' music and what differentiates it from European or African Music

    asked by trina
  15. math

    Sam has twice as many books as Jim. If Sam gives 12 books to Jim, they will have the same number of books. How many books to they have altogether?

    asked by brian
  16. Bus. Math

    Misu Sheet, owner of the Bedspread Shop, knows his customers will pay no more than $140 for a comforter. Misu wants a 25% markup on cost instead of on selling price. What is Misu’s cost? (Round your answer to the nearest cent.)

    asked by AMBER
  17. Math

    Manny has a piece of ribbon that one third yard long. He cuts it into two equal length to make bookmarks .how long is the piece of ribbon?

    asked by Darian
  18. Math 120

    The table shows the​ distribution, by​ age, of a random sample of 3990 moviegoers ages​ 12-74. If one moviegoer is randomly selected from this​ population, find the​ probability, expressed as a simplified​ fraction, that the moviegoer is not in

    asked by Jessica
  19. Precalculus

    write a polynomial function in standard form with real coefficients whose zeros include 4, 7i, and -7i

    asked by Anonymous
  20. Social Studies

    21. Why did Buddhism become popular in India? (3 points) Please help with this question fast. Thx

    asked by Penny
  21. Language Arts

    "who are those old men bent over in the sunshine? Skeletons of corn" Which line or lines show the distressing tone of the poem 1. line 1 2. line 2 3. line 3 *** 4. lines 1 and 2

    asked by BoTheTruthThompson
  22. Maths

    The height and volume of a square based pyramid are 12 cm and 100cm respectively.Find the length of the square base?

    asked by Spring Field
  23. Physics

    Efficiency of a single fixed pulley is 85%.what effort is needed to lift a load of 85kgf using it?

    asked by Ishpreet

    Each year, 64 college basketball teams compete in the NCAA tournament . Sandbox . com recently offered a prize of $10 million to anyone who could correctly pick the winner in each of the tournament games. A. How many games are required to get one

    asked by Jen
  25. word problems

    In certain deep parts of oceans, the pressure of sea water, in pounds per square foot, at a depth of d feet below the surface, is given by P=16+7d/11 If a scientific team uses special equipment to measures the pressure under water and finds it to be 646

    asked by josh
  26. Math

    Austin collected 30 9/10 kilograms.Exactly 2/3 of the class was blue.what is the total amount of glass was blue?

    asked by Zelda
  27. Chemistry

    Calculate the amount of heat necessary to raise the temperature of 12.0 g of water from 15.4ºC to 93ºC. The specific heat of water = 4.18 J/gºC. q = ms∆T q = (12.0g) (4.18) (93.0 - 15.4) q = 3892.416 J ??

    asked by Anon
  28. Statistics and Probability

    A machine is designed to fill jars with 16 ounces of coffee. A consumer suspects that the machine is not filling the jars completely. A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounces. Is there enough evidence to support

    asked by Dianne
  29. Precalculus

    Which of the following cannot be the number of nonreal zeros of a polynomial of degree 5 with real​ coefficients? A. 2 B. 0 C. 3 D. 4 E. None of the above

    asked by Anonymous
  30. MAth

    Determine when the Hamilton method gives an Alabama paradox and who lost the representative. Increase the committee size by one seat at a time, starting from an 8-member committee. Given: City A, City B, and City C are cooperating to build a community

    asked by Catherine
  31. Grade 4 Math - fractions

    On pet day, 18 children brought a pet to school. Two-thirds of the pets were dogs. One ninth of the pets were cats. How many were dogs? How many were cats? How many animals were neither dogs nor cats?

    asked by Cindy
  32. Pre-calculus

    An expedition walks 4 kilometers from camp on a bearing of 30 degrees, then turns and walks 10 km on a bearing of 160 degrees. Find the magnitude of the new location relative to the beginning location using vectors. -> if you can, can you possibly show how

    asked by Nicole
  33. Designing Specialty Areas

    There are many different types of playgrounds. Which of the following statements comparing playgrounds is true? A. Children engage in a wider range of activities when playing in an adventure playground rather than a contemporary or traditional playground.

    asked by Priscila
  34. Math 120

    Heart disease was the leading cause of death for women in the United​ States, killing​ 292,188 women in​ 2009-that was approximately one in every four female deaths. What is the chance of two non-related women in a row both having heart disease?

    asked by Jessica
  35. physics

    a uniform meter rule is pivoted at 20cm mark . It is balanced when mass of 100gm on 10cm mark and mass of 50 gm on 30 cm mark are suspended. Find d mass of meter rule

    asked by shreya
  36. Chemistry

    Consider 1.00 L of the buffer system that contains 0.200 M hydrocyanic acid(HCN) and 0.150 M sodium cyanide (NaCN). The pKa of hydrocyanic acid is 9.31. What is the [HCN] after 0.020 mol of HCl is added?

    asked by Mary
  37. algebra

    A car rental company offers two plans for renting a car. Plan A:40 dollars per day and 20 cents per mile. Plan B: 56.32 dollars per day and 12 cents per mile. If you plan to rent the car for one day, and "m" represents the number of miles driven in that

    asked by Carlos
  38. Chemistry

    Write the balanced chemical reaction (showing appropriate symbols and states) for the chemical reaction with enthalpy change equal to and defined by the quantity dHformation [NH3(g)] N2(g) + 3H2(g) --> 2NH3(g) Is that all the question is asking for?

    asked by AJ
  39. eec115 electrical and electronic engineering science

    two capacitor having capacitance of 10uf and 5uf are connected in series and this combination is connected in parallel with a 20v supplies this parallel combination calculate the charge on each capacitor .the voltage across the 10uc capacitor.

    asked by brownson uwem okon
  40. Math

    There are four different kinds of animals on the farm. There is a different number of each kind of animal. There are 19 more cows than sheep. There are 19 more ducks than hens. There are more hens than cows What is the answer

    asked by Tasmeeyah
  41. math 1

    Example 3: The table below shows the amount a banquet hall charges to feed different sized groups of people Number Of People | COST 10 $200 14 $252 21 $441 23 $471 Using a linear model, what is the approximate residual value of the cost to feed 21 people

    asked by Jack(BIG HELP)
  42. Math

    Cosmic ray bombardment of the atmosphere produces neutrons, which in turn react with nitrogen to produce radioactive carbon-14. Radioactive carbon-14 enters all living tissue through carbon dioxide (via plants). As long as a plant or animal is alive,

    asked by Shelia
  43. Economic

    A new technology reduces the time it takes t9 make a pair of khaki pants

    asked by Toni
  44. AP chem

    Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H an explanation/step by step would be nice because i keep getting wrong answer from the H+ & H2O (they are both suppose to be 12 according to

    asked by Alice
  45. math

    the speed of a gear wheel varies inversely as the number of teeth of the gear. if a gear wheel which has 48 teeth makes 3 revolutions per minute. how many revolutions per minute will a gear wheel with 96 teeth make?

    asked by edgar
  46. Chemistry

    The enthalpy of formation for a substance corresponds to the enthalpy change for a reaction. Write the specific chemical reaction defining the enthalpy of formation of butane: Just checking to make sure this is correct: 4C + 5H2 ---> C4H10

    asked by AJ
  47. Math

    Miss Lee spent $840 on a vacation. She spent two thirds of the amount on a train ticket and half of the remaining amount on food. How much did she spend on the ticket and food all together?

    asked by Alexa
  48. Math

    A small country consists of seven states; there are 189 seats in the legislature that need to be apportioned among the seven states; and the population of each state is shown, State A: 1283 State B: 2374 State C: 2725 State D: 2155 State E: 1592 State F:

    asked by Catherine
  49. math

    BC is a chord of a circle with center O and area 48pi. Point A is inside BCO such that ABC is equilateral and A is the circumcenter of BCO. What is the area of triangle ABC

    asked by da
  50. Precalculus

    Write a polynomial function of minimum degree in standard form with real coefficients whose zeros and their multiplicities include those listed. 2(multiplicity 2), -4(multiplicity 3)

    asked by Anonymous
  51. physics

    Which force(s) provide(s) the centripetal force needed for a car to make a turn on a banked curve? A. Weight, only B. Tension, only. C. Friction, only. D. Coriolis force, only. E. Friction and normal force. Is it D?

    asked by Idali
  52. Math

    Use the Hamilton method of Apportionment to make the assignment. In a recent census, Iowa's population in thousands was 4,503, Illinois' was 8,220, and Indiana's was 5,300. Allocate 31 members of the U.S. House of representatives to these three states.

    asked by Catherine
  53. Designing Specialty Areas

    You're designing a space for families. Which of the following would be an important step in developing the space? A. Form a group of current teachers and teaching assistants to design the area. B. Hire a consultant to design the space. C. Have the director

    asked by Priscila
  54. Probabilities and Statistics

    How does the number of study hours change during a semester? How do you determine what graph to use? I am so confused

    asked by Carla
  55. OK History

    I need someone to make sure my answers for my Oklahoma State History homework are correct. I put *** by my answers. If I am wrong, please explain why or help me find the right answer. Thanks in advance! 1. Indian Territory after the Civil War experienced

    asked by Allie
  56. pre calc

    A ship is tied to two anchors on the shoreline. The anchor line on the left forms a 46 degree angle with the shoreline and is 350 feet long. The anchor line on the right forms a 63 degree angle with theshoreline and is 283 feet long. Find the exact

    asked by sydney
  57. Physics

    A 240 kg roller coaster car Rolls over the crest of the roller coaster with a speed of 2.2m/s.if it falls through a vertical height of 12m down the tracks to the bottom of a trough, how fast will it be travelling? So here's what I did but I don't think

    asked by Laura
  58. Designing Specialty Areas

    Bolinda wants to create an illusion of more space in her program. Which of the following techniques would assist her to do this? A. Using different rugs in different parts of the room B. Painting the walls a variety of different colors C. Closing the

    asked by Priscila
  59. science

    would all of the lead (ii) bromide (ksp = 6.3 x 10^-6) dissolve if 2.25 g is added to 500 mL of water

    asked by Kate
  60. chemistry

    Write a comlete, balanced chemical equation for the reaction that occurs between aqueous iron(II) sulfate,FeSO4, and aqueous potassium hydroxide

    asked by betty
  61. AP Chem

    Write the overall net-ionic reaction that occurs when iron (ii) hydroxide (Fe(OH)2, Ksp = 7.9 x 10^-15) is dissolved in a 0.500 M sodium cyanide solution forming a complex ion. (Fe(CN)6^4-, Kf = 7.7 x 10^36) Determine the value of the equilibrium constant

    asked by frank
  62. health

    1.why is it necessary to make a pressure bandage for a bleeding injury a)to cover the wound so id does not get contaminated b)to create a barrier so the blood does not infect the rescuer

    asked by ave
  63. Precalculus

    There is at least one polynomial with real functions with 9+i as its only nonreal zero. A. The statement is​ false, because the Fundamental Theorem of Algebra dictates that there must be n complex zeros for a polynomial of degree n. B.The statement is

    asked by Anonymous
  64. math

    Mrs koh is now 58 years old and corrine is 28 years old. How many years ago was mr skoh 6 times as old as corrine?

    asked by jazel
  65. math

    The area of a spherical balloon expand at a rate of 0.4cm square/s .find the rate at which its volume expand when the radius is 12cm

    asked by lyn
  66. English

    1. He read this book in a day. 2. He read this book within a day. 3. He read this book at the end of a day. ------------------------------ 'In' means 'within' or 'at the end of' according to a dictionary. Q1: Does #1 mean #2? Q2: When he read the book for

    asked by rfvv
  67. English

    1. He will come back in five days. 1-2. He will come back at the end of five days. 2. He will come back within five days. 3. He will come back after five days. 4. He came back after five days. -------------------------------- Does #1 mean #1-1? What about

    asked by rfvv
  68. Precalculus

    Find a polynomial with real coefficients that has the given zeros. -1 and 4-5i

    asked by Anonymous
  69. Chemistry

    Potassium is a reactive element. Bromine is a reactive element. Write the complete balanced chemical equation using appropriate chemical symbols for the reaction when potassium reacts with bromine to make a solid product showing correct symbols and states

    asked by Anon
  70. Geometry

    The sides of one triangle are twice as long as the corresponding sides of a second triangle. What is the relationship between the angles?

    asked by Susey
  71. Precalculus

    The instruments with an aircraft show that it is headed east with an airspeed of 180 mph. After 2 hours, the aircraft is actually 375 miles east and 20 miles north of its starting point. Find the wind speed and its direction.

    asked by Merry
  72. English

    1. Give her a big hand. 2. Let's clap for her. 3. Put your hands together for her. (Are they all the same? Do you have some more similar expressions?) 4. Have a conversation with him. 5. Talk with him. 6. Speak with him. 7. Communicate with him. (Can we

    asked by rfvv
  73. Chemistry

    indicate whether the following would increase decrease or have no effect on the solubility of copper (ii) carbonate (ksp - 2.5 x 10^-10) when compared to the solubility of water 1. dissolve it in an acidic solution 2. dissolve it in ammonia, forming a

    asked by Alice
  74. Chemistry

    The following ions contain three oxygen atoms: A) carbonate, sulfite, and nitrite B) sulfite, nitrate, and bromate C) sulfate, hypochlorite, and carbonate D) chlorate, iodate, and phosphite I know I can eliminate A and C.

    asked by Anon
  75. math

    List the real zeros and multiplicity of f(x)=-5(x^2+25)(x-3)^3

    asked by Alex
  76. Math Statistics

    They used an exponential regression model where the predictor is time in months and the response var is money measure in thousands of dollars. Alpha 4.2 and Beta is 1.03 Based on this model, how much money (in thousands) will he have after six months? I am

    asked by claire
  77. physics

    A stone of mass 5kg is thrown vertically upwards with velocity 10ms final calculate the height.

    asked by Aisha haruna
  78. math

    Smokers. A life insurance company found that among its last 200 claims, there were six dozen smokers. What is the ratio of smokers to nonsmokers in this group ...

    asked by xyz
  79. math

    The first time the shuttle fires is at 7:44:35:16 on Friday morning and the next time it fires them is in the wee hours at 2:26:33:07 on Saturday morning. How much time has elapsed between one firing and the next? 7:44:35:16 means

    asked by Sabrina
  80. Pre calc DUE TOMRROW

    A ship is tied to two anchors on the shoreline. The anchor line on the left forms a 46 degree angle with the shoreline and is 350 feet long. The anchor line on the right forms a 63 degree angle with theshoreline and is 283 feet long. Find the exact

    asked by Madison
  81. math

    Find two fractions in lowest terms with unequal denominators whose difference is 2/7?

    asked by Sara
  82. Physics

    Hello so my question is an 85kg kangaroo acquires 2.2kJ of energy in jumping straight up and down from rest. How high does the kangaroo jump? My solution: When he's at rest Eg=2200J but in air Eg=0 Eg=mhh 2200=85(9.8)h 2.64m=h Looking at it now it doesn't

    asked by Amy
  83. MATH 2

    Elisabeti bikes from home to the grocery store and back to pick up in- gredients. On the way to the store, she averages 15 mph. Encumbered by groceries, she averages 10 mph on the way back. What is her average speed for the whole hour?

    asked by Sara
  84. English

    A mobile phone is not a protection rather a parent..... Can someone help me? I'm trying to say a mobile is not reliable we should look after our child more often?

    asked by Ruwaydah
  85. Algebra

    Factor: x^2+6x Please give step by step directions! Thanks!

    asked by Katie
  86. English

    1. The idiom get inside the authors head means to 2. Base word of accusation

    asked by Mark
  87. physics

    what is the work done in moving a positive charge 12UC across two points 6cm apart

    asked by Vibez
  88. Writing

    What is the correct way to write this sentence? For the fourth-grade class hike, a lot if kids wore new hiking shoes, they were sturdy. Answer choices A For the fourth-grade class hike, there were a lot if kids they wore new hiking shoes that were sturdy.

    asked by Ashley
  89. Physics

    A 55kg arrow is fired vertically upward at a speed of 42m/s. It rises upwards, then drops and lands on the ground. If it lodges itself 12cm in the ground, determine the average force that the ground exerts on the arrow This is what I've done but I don't

    asked by Laura
  90. math

    Is the function a polynomial function? Why or why not? If it is a polynomial function identify and label the leading term and constant term. Here are the functions f(x)=(2-x^4)/13 f(x)=x^3+9x-(1/x) it would be great if you could do everything step by step

    asked by Alex
  91. computer

    Write a program to let the user capture personal details: names, address, telephone, age, city, then display them. Use both “readline” and “showInputDialog” functions

    asked by amos
  92. calculus

    Evaluate the integral. from 1 to 5 (ln(x))^2/x^3 dx.

    asked by olga
  93. English

    Is this thesis correct? Heathcliff is a mysterious, antagonist, and feels betrayed by his only true love.

    asked by Tima
  94. Math Statistics

    I am confused I want to find the values of the equation of Yi=a + bxi. Time spent on twitter is the predictor variable and time spent working on twitter is the response The correlation between minutes spent on twitter and minutes spent working is -0.5 The

    asked by claire
  95. 5th grade math equation

    I have tried everything to help my son and I can't figure it out. I am trying to get an end result of 38 out of the following equation. We have to add parentheses to make it equal 38 any help !!! 3+6*5+4/2-7

    asked by Richard
  96. Heath

    if you take insulin and you dont have diabetes what will happen to you will you die??

    asked by Young Trippy Lil G
  97. math

    Applewood Supplies received a payment of $864from Main Street Service on october 8 on an invoice of $1999.58 dated september 29 with terms 4/ much does Main Street Service still owe on the invoice?

    asked by ppp
  98. Fraction

    henry is 1/3 his father's age and 1/4 his mother's age.their total age is 96 old is henry's mother?

    asked by Anonymous
  99. MATH

    Morwen bikes around his neighborhood for an hour. He averages 15 mph for the first 40 minutes, but then he tires and averages 10 mph for the last 20 minutes. What is is his average speed for the whole hour?

    asked by Sara
  100. MATHS


    asked by CATHERINE
  101. Personal and professional development

    Evaluate approaches to self-managed learning?

    asked by AALIYA
  102. Science

    What is the name of experiment to show that a product obtained is a basic oxide 2Mgo+O2=2MgO

    asked by Jjjjjjjj
  103. Linear Algebra

    Hi, I really need help with these True/False questions: (a) If three vectors in R^3 are orthonormal then they form a basis in R^3. (b) If Q is square orthogonal matrix such that Q^2018 = I then Q^2017 = Q^T. (c) If B is square orthogonal matrix then B^−1

    asked by Matt
  104. math

    A problem whose quotient is 2/7

    asked by Sage
  105. math

    A company is making detergent out of soap and water. They made one batch that has 30% soap and another batch which is 60% soap. If they mix 600 liters of the first batch with 300 liters of the second batch, what percent of soap will be in the detergent?

    asked by Anonymous


    asked by CATHERINE
  107. math

    Find two binomials whose sum is 4x^2 - 4x - 15

    asked by Sam
  108. physics

    determine the center of mass for three particles(1.5, 2.5, 3.5) forming a equilateral triangle one side lenght of 135cm.

    asked by dickson
  109. math

    if X:Y =A:B show that Y:B=(X+Y):(A+B)

    asked by xyz
  110. Math

    How to get 44 using the digits in 2017. You can use +,-,×,÷,√,!,!!,exponents. Double digit numbers are allowed. You can use each digit only once.

    asked by Sabrina
  111. Chemistry

    If you had a 100 mL of 2.00 M HCl and you added 100 mL to it what is the final volume and final concentration? The volume would be 200ml, but would the concentration just stay the same?

    asked by Nathaly
  112. Personal and professional development

    evaluate approaches to self managed learning

    asked by AALIYA
  113. math

    the low tempuerture was 35 f. This was 13 f lowewr than the daytime high temputure.Write an equation to determin whete the high temperature was 48 f or 42 f

    asked by HALEY
  114. Maths

    Please tell me the formula for volume of square based pyramid

    asked by Spring Field
  115. AP physics

    1000 kg car is going clockwise around a curve iwth radius of 30m. coefficient of frction=0.5 if the road was banded at an angle what would happen to the speed required or the radius of the curve? explain.

    asked by Anthony
  116. maths

    5 geometric mean betweem 16 and 1/4

    asked by Rohit
  117. calculus

    x ln(3 + x) dx

    asked by raven