1. Chemistry - enthalpy and rate constant (check)

    22. The rate of a chemical reaction is dependent on its ΔH. Do you agree or disagree with this statement? Briefly justify your answer. I agree with the above statement, enthalpy is defined as the internal energy of the reactants and products therefore
  2. Relative Extrema: AP Calculus

    Consider the function f(x)= (3/4)x^4-x^3-3x^2+6x Find the relative extrema for f(x); be sure to label each as a maximum or minimum. You do not need to find function values; just find the x-values. Determine the interval(s) where f(x) is increasing (if any)
  3. math for teachers

    John is building bookcase 73 3/8 inches tall, he wants 5 shelves equally spaced. Where does he drill holes (space between shelf)? Shelf is 3/8 inch thick. Do I add 3/8 for top and bottom? or is shelf 5 bottom? I do not have a clue.
  4. Span linear

    hello everyone!i'm breaking my head and desperate how to do it... If i have a vector in linear space V:r v1,v2.....vk,a,b having A={v1,v2.....vk,a} B={v1,v2....vk,b} C={v1,v2...vk} and its known that V=sp(A) and b∉sp(C)........ needed to prove 1) a
  5. Question

    Am I PUNCTUATING THIS SENTENCE CORRECTLY? Have you read the article entitled"Increase Your Vocabulary"? Do Place a comma after the word entitled? Do I Underline the title of the article? It's punctuated just fine, except you need a space between entitled
  6. Physics

    A Vogon’s grandmother, whose mass is 89 kg, drifts through empty space with a velocity of –6.20 m/s until she encounters the 460-kg Ravenous Bugblatter Beast of Traal, drifting with a velocity of +2.80 m/s. When they meet, the RBBoT immediately eats
  7. science

    An unsecured astronaut is floating in deep space. He switches on a hand held drill. The drill bit begins rotating clockwise with high angular velocity. Describe what happens to the astronaut- drill system and explain why.
  8. Chemistry

    Last week we drew Lewis dot structures of azide (N31-), a crucial component in automobile collision safety airbags. During an impact, a sensor ignites a detonator cap that sets off the following rapid reaction: 2NaN3(s) → 2Na(s) + 3N2(g) Part A What
  9. AP GLOBAL

    Explain the basic features of Dravidian and Aryan religious structures which became the basis of Hinduism. I jest need some more to add on to what I already have. Thanks. Dravidian (Harappan) religion had strong beliefs about fertility. Harappan worshipped
  10. English

    I must improve the organization of these four sentences of a paragraph in the most effective way. Is my answer correct? Sentences: 1. The reader has probably figured out that the boy named Walter was Walter Elias Disney. 2. During his lifetime Disney and
  11. Quantitative methods.

    INVENTORY MODEL The demand for a particular item is 10 000 units per yer. The number of units per order is 900. The set cost is rs 90 per order, the cost of item is rs2 per item and the holding cost is rs 080 per item per month. If no shortages are allowed
  12. economics

    Over the last two decades, the price of personal computers in real as well as nominal terms has declined markedly. Does this mean that the personal computer industry is decreasing-cost and that the long run supply curve for personal computers is downward
  13. Math

    A cone and a square based pyramid have slant heights of 6 inches . The diameter for the cone and the base edge of the pyramid are both 8 inches. How would I find which space figure has the greater surface area
  14. Math - Help!

    The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6)
  15. english

    I need help with a nonverbal communication types: For example, for (1)the American Sign language...I need to give examples of workplace and lifestyle. (2) Proxemics-the languge of space;example of workplace and lifestyle.Please tell me a ways to write
  16. Geography

    Which of the following does not describe a boundary? A. Vertical plane that cuts through the rocks below. B. Divides one state from another. C. Natural Resources identify boundaries D. Air space defined above the atmosphere of a state. E. All of the above
  17. Are all answers right?

    The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6)
  18. English

    First, identify the gerund in the sentence below. Then, replace the gerund with the infinitive of the same verb. Type the infinitive form of the verb in the space provided. Debbie loved watching the skaters glide around the rink.
  19. College Physics 1401

    The Space Shuttle travels at a speed of about 7.60 103 m/s. The blink of an astronaut's eye lasts about 100 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?
  20. English

    Select the letter of the choice that indicates which sentence-combining strategy best applies to the example: Off in the thick of the woods came a fairy sound, followed by a tremulous silence, a holding apart of the air. a. varying the length of sentences
  21. Chemistry

    How does the three dimensional structure of SP3 bonds of Carbon, Nitrogen, Oxygen and Fluorine cause them to form polar or non-polar molecules? The answer must include a 3d diagram of the molecules, and a discussion of the effect of their electron
  22. Micoreconomics

    As a general rule, profit-maximizing producers in a competitive maket produce output at a point where: A) Marginal cost is increasing B) Marginal cost is decreasing C) marginal revenue is increasing D) Price is less then marginal revenue I picked C? The
  23. Soical Stuides

    Which was a goal of Samuel Gompers, but not of socialists? A.improving workers' lives but leaving society's structure alone B.workers' right to negotiate through collective bargaining C.safe working conditions in America's factories and mines
  24. Cultural Diversity

    A cultural mismatch may result from labeling a child as hyperactive or behavior disordered if: A. a young black child does not receive frequent nourishment opportunities B. there is too little or too much structure imposed in the group. C. the program
  25. Calculus - MathMate Please help

    ok, i tried to do what you told me but i cant solve it for c because they cancel each others out! the integral for the first one i got is [sin(c)cos(x)-cos(c)sin(x)+sin(x)+c] and the integral for the 2nd one i got is [-sin(c)cos(x)+cos(c)sin(x)-sin(x)+c] I
  26. Journalism

    could you put these sentences in order to create a story.In the correct order? 1. Witnesses told police that the man appeared to be in his early 20s and wore dark clothing. 2. According to officers, an unidentified man starting shooting after he walked up
  27. c++ programming

    I need some help with my homework please Write a C++ program to prompts the user to enter the first character of shape name (Cycle, Rectangle, or Triangle). Then calculate the area of that shape. „h If the user enters another character the program should
  28. Thin layer chromatography

    I've done some TLC plates using ethyl acetate with 0.5% glacial acetic acid as a solvent. The structure of these substances looks polar to me. I"m assuming that ethyl acetate is not very polar. Is this correct? Acetaminophen barely travelled any distance
  29. science

    Hi .. Please school is coming and I need help im ny research What are the patterns of the Reactivity in the Periodic table and the Atomic Structure I have been in lots of websites and I can't find it Please help tahnx Metals in the lower left corner are
  30. Science

    what does DNA stand for? What is a gene? Where in the cell are chromosomes located? what two scientists established the structure of DNA? DNA is sometimes descrived as twisted ladder. What is this shape called? What forms the backbone of DNA? What forms
  31. Geometry

    Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter.
  32. Business English

    Identify and correct the errors in the following to create parallel structure: To narrow a web search a. Put quotation marks around a phrase when you want an exact term. b. Many search engines have wild cards (usually an asterisk) to find plurals and other
  33. science

    Give 2 different reasons why two muscles that act across the same side of the same joint are not necessarily redundant? Explain your reasons in detail and give at one real example that illustrates each reason. Question 2. : Relate their structure of a
  34. Chemistry (equilibrium)

    C2H6(g) <=> C2H2(g) + 2 H2(g) The ΔH° for the reaction above is +312 kJ. The system is initially at equilibrium. In which direction will the reaction shift in each of the following situations? e) The temperature is decreased. g) He is added at
  35. physics

    Which of these are correct for an electric field? A) It's a vector quantity, and can be cancelled.B) Three of three are correct.C) It stores electric energy.D) Two of three are correct.E) It's the altered space surrounding electric charge.
  36. Science

    One of the most common commercial methods for the production of pure silicon that is to be used for the manufacture of semiconductors is the Siemens process (see Figure P5.3.5) of chemical vapor deposition (CVD). A chamber contains a heated silicon rod and
  37. physics

    A proposed space station consists of a circular tube that will rotate about its center(like a tubular bicycle tire). The circle formed by the tube has a diameter of 1.1km. What must be the rotation speed(revolutions per day) in an effect nearly equal to
  38. physics

    A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1 km. What must be the rotation speed (revolutions per
  39. health care

    can anyone tellme how Collegial Model management structures affect day to day work in a organization? Well, tyrants don't exist, and if they come in and start bossing, they are in for a surprise: The collegial model depends on all the employees accepting
  40. college maths

    Suppose that you have been asked to take over as a project manager on a small construction project which has been decomposed into 7 tasks – activities. Let Qi be the quantity of work for task i (expressed in labor days/machine days/ days needed to
  41. english

    sat skills. write the word in the space provided. 1-how sad it to see such beautiful flowers ----------- and die! 2-a person can usually tell how popular a new movie is by the length of the ----------- in front of the box office. 3-the desire to be the
  42. Chemisry

    Use chemical principles of atomic structure and or chemical bonding to explain each of the following. 1. At 25.0 degrees C and 1atm, F2 is a gas, whereas I2 is a solid. 2. The melting point of NaF is 993 degrees C, whereas the melting point of CsCl is 645
  43. Chemistry

    Element X has a face-centered cubic unit cell structure. If the density of the element is measured to be 12.4 g/cm^3, what is the atomic radius of X? units are in pm (picometers) I can't seem to find how to get the atomic radius with only the density given
  44. Separation of Racemate

    You have the racemate of a material. This material has an acid group as part of its structure. You also have a chiral base available. Design an experiment to separate the racemate into pure enantiomers. I have no ideas about this experiment and I need some
  45. GRAMMAR/SENTENCE STRUCTURE

    John Darsee has been one of many scientists and researchers involved with the scandal of scientific misconduct, where he deliberately falsified data and published his results to scientific journals. First, I will discuss the case of John Darsee, as well,
  46. health and huma services

    Can someone please help I am having problems with this assignment? The Miami Cuban-American Service Center was founded in 1962 as a place for older Cuban Americans to meet and socialize. Over the years the agency became increasingly involved in providing
  47. 7th Grade Math

    I am stumped about the order of the steps to follow on the right side of a 2-step math equation that I have for homework tonight: 2(6d+3)=18-3(16-3d) Do I multiply -3 times 16 and -3 times -3d or do I isolate the minus/negative sign and multiply 3 times 16
  48. Physics

    Zero, a hypothetical planet, has a mass of 2.7 x 10^23 kg, a radius of 2.8 x 10^6 m, and no atmosphere. A 3.6 kg space probe is to be launched vertically from its surface. (b) If the probe is to achieve a maximum distance of 4.6 × 10^6 m from the center
  49. science

    the planets of the solar system revolves around the sun in orbits because the the Suns__________. A.The suns gravity B.The suns rotation C.the suns heat energy D.The suns magnetic feild Maybe C. & d. is wrong i think What keeps anything from flying off
  50. Decimal problem #2

    The glass mirror of the Hubble telescope had to be repaired in space because it would not focus properly. The problem was that the mirror's outer edge had a thickness of 0.6248 cm when it was supposed to be 0.625 cm. Was the edge too thick or thin? By how
  51. Physics

    A space craft made up of two parts with masses m1 = 2.3 kg and m2 = 3.4 kg is held together by explosive bolts against a spring. The spring is compressed by 73.0 cm and has negligible mass. After the bolts are exploded m1 is found to have a speed of 3.6
  52. math

    A cow is attached to a rope 10 feet long in a pasture bordered by two fence( more than 10 feet long) meeting at an angle of 60 degree. What is the area of the space in which the cow is grazing? a. 20 pi b. 5 pi /3 c. 20 pi /3 d. 50 pi /3 e. 100 pi please
  53. A probability question i think

    In a chess variant, a "lord" can move one space at a time, either upward, or to the right, or diagonally upward and to the right. How many ways are there for a lord to move from the bottom left to top right corner of the 8 by 8 chessboard? Thanks in
  54. physics

    Two large horizontal metal plates are separated by 4mm. The lower plate is at a potential of (-)6v.What potential should be applied to the upper plate to create field strength of 4000v/m upwards in the space between the
  55. English

    Lisa thinks the people will be happy in the future. They will enjoy their holidays and can travel to the space. But Tommy thinks the people will be unhappy in the future. They will suffer from hunger and air pollution. (Would you like to correct the
  56. Math/Algebra

    Rashid picks 420 strawberries in 5/6 hour. Write and solve an equation to find how many strawberries can she pick in the space of an hour? I'm not good with word problems, and am completely lost. I can do everything except the equation (I think). Please
  57. biology honors

    Why do leaves tend to be flat.choices a.so that water can easily be absorbed and carried to the rest of the plant. B.so that sunlight can easily penetrate to the leafs photosynthetic tissues. C.so that nutrients can easily enter the plant and be be used
  58. Psychology

    Dr. Wade excitedly explains that the difference between a male and female is apparent in the structure and function of the brain. She is so pleased that you have asked about her research that she eagerly shares slides of PET scans which support her
  59. Physics

    Ninja goes to space! If Ninja has a weight of 83.59 N on earth and she lands on a planet that has an acceleration due to gravity of 1.44 m/s2, then what is her weight on the new planet?
  60. Science

    Does air have mass? I think it does because air takes up space so it is matter and matter has mass. right you are. To weigh it is a bit tricky. One way is to compress it.
  61. space

    A water tower has to be equidistant from three communities. The communities are at positions (-25, 20), (-5, -40) and (15, 30). Find the coordinates of the point where the water tower should be built.
  62. Math

    The inside of a refrigerator is 6 feet tall, 3 feet wide, and 2 feet deep. How many cubic feet of space are inside the refrgerator
  63. Math

    ) In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and
  64. Physics

    Two astronauts, each having a mass of 61.9 kg, are connected by a 14.7 m rope of negligible mass. They are isolated in space, orbiting their center of mass at speeds of 5.57 m/s. Calculate the magnitude of the initial angular momentum of the system by
  65. science

    two parallel plates are separated by a dielectric of thickness 2mm and a dielectric of constant 6.if the area of each plate is 40cm2 and p.d between them is 1.5kv,find the capacitance,the energy stored by the capacitor and the ratio of the capacitance if
  66. chemistry class

    i posted this question a few minutes ago i tried to solve it on my own can someone check if my work is okay? The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83
  67. chemistry, chemical kinetics

    I keep getting these questions wrong, could someone please help. Thanks so much. Question 1 For the following overall reaction, the rate constant is 3.4x10^-2. A(g)+ 2B -> 2C + D What may be the rate reaction? Question 2 The rate law for this reaction
  68. Math

    With order of operations, how would I solve this equation?! 12-18.5+15+6.3-1+28
  69. Chemistry/Science

    Can a reaction order be negative?
  70. (Math

    IS their a caculator online that does order of operations?
  71. Math

    Without multiplying order the following products from least to greatest: 2 x 3/5, 1/4 × 3/5, 1 2/5 × 3/5,6/6 × 3/5
  72. math

    put these fractions in order least to greatest 3/4,4/5,7/8,and 3/10
  73. Calculus

    Reverse the order of the double integral (y+1) dx dy, where -1<= y <= 4 and y - 4 <= x <= 4y-y^2
  74. Business Comm 1

    What is deductive order strategy?
  75. biology

    create a mnemonic for the 6 kingdoms they maybe in any order but you must have all 6
  76. home school

    In which of the following are 1/2,5/6, and 5/8 arranged in ascending order?
  77. Math

    Use the order of operations to find the value of the expression. 6 x 5 + 3 x 8 Please help.
  78. math

    what order are these fractions from least to greatest 1/7,1/9,2/7,1/12 2 5/6,9/8,3 1/8,3 1/9 5/9,10/3,2 1/4,3/2 11/2,4 1/2,1/100,5 1/4
  79. differential eqautions

    linear equations of order one 1. (x^2-1)dy/dx+2y=(x+1)^2
  80. Math

    which set of integers are in the right order from least to greatest a.|-10|,-3,2,7 •• b.7,|-10|,-3,2 c. 2,-3,7,|-10| d. -3,2,7,|-10
  81. math

    which of the following shows the numbers in order from least to greatest a)2 /15,2 1/6,2 1/7 b)2 1/8,2 1/4, 2.4 c)2.4,2 1/5,2.6 d)2.2,2.5,2.25
  82. Math

    Solve: _/_*_+_*_*_/_+_*_=100 Using only numbers 1-9 in any order.
  83. Calculus ll

    find the second order derivative, rxy(x,y) for r(x,y)=xy/8x+5y
  84. CHEMISTRY

    ARRANGE THE FOLLOWING 0.1 M SOLUTIONS IN ORDER OF INCREASING PH
  85. math

    Using These Numerals 1,9,9,6 in the same order how can you make the numbers 73 76 77
  86. math

    How can you order 3 fractions by using a number line?
  87. Math

    Order from least to greatest. 2/3 65% 0.06 I put 0.06 then 65% and 2/3 is that correct?
  88. Math

    Order from greastest to least -1 13/14 , -1.9 , -1 9/11, -1.95 show work
  89. Math

    Write the following fractions in increasing order: 45/44, 5/4, 12/11
  90. math

    How can you order 3 fractions by using a number line?
  91. 4th grade

    name the 50 states in alphabetical order?
  92. math

    Put these numbers in order from greatest to least. 0.8 5 3 15 - 5
  93. Math HELP please!

    Order the rational numbers from least to greatest: 0.42, - 1/2, 11/20, - 0.51. - 0.51, 0.42, - 1/2, 11/20 - 0.51, - 1/2, 0.42,11/20 - 1/2, - 0.51, 0.42,11/20 - 1/2, - 0.51, 11/20, 0.42 PLEASE HELP
  94. Math

    Use the order of operations to simplify each of the following : a) 4*3^3- 54÷6+5^2 b)314-3 [2^5 -(9- 4 ) ^2 +3]^2
  95. math

    can someone help me find a way to remember the order of operations!? thanks.
  96. us history

    sequencing the louisiana purchase in order from a-j
  97. Math 116

    How do you graph X=2 and y=-3 what is the order pair if any?
  98. Math

    Order each set of integers from least to greatest 1.-2,3,0,-1,1 -2,-1,0,1,3 8.3,-3,-2,1,-1 -3,-2,-1,1,3 9.5,-7,-2,1,9 -7,-2,1,5,9 10.-2,1,5,-5,0 -5,-2,0,1,5
  99. MATH

    which set of integers are in the right order from least to greatest a.|-10|,-3,2,7 b.7,|-10|,-3,2 c. 2,-3,7,|-10| d. -3,2,7,|-10|
  100. Math

    i have -2/5, 1/6, 7/8, -5/9, 3/4 how would i put these in asending order being they are fractions?