Rank the crystal lattice structures in order of decreasing efficiency of space in the structure.

20,916 results, page 9

  1. Biology--Urgent

    Need help with these: a) What is a major structural advantage that eukaryotic cells have over prokaryotic cells? Why is this so important? b) Identify one similar and one different way each type of cell uses flagella c)The cytoskeleton of eukaryotes serves many functions. One ...
  2. physics please help

    a 65 kg bag is dragged along a 12m ramp in order to get from the ground to the floor of the loading dock 2m above the ground. determine the efficiency of of the ramp. The frictional force acting on the bag is 50N due to the ramp. I don't understand how to the find the energy ...
  3. Chemistry

    Use the MO model to predict the structure of ketene (H2CCO). Draw a Lewis structure of the molecule that shows the positions of the orbitals and the atoms in three-dimensional perspective.
  4. Chemistry

    Use the MO model to predict the structure of ketene (H2CCO). Draw a Lewis structure of the molecule that shows the positions of the orbitals and the atoms in three-dimensional perspective.
  5. Math

    When leaned against a vertical structure, a straight ladder can be used safely if its top is no more than 4 above the base of the structure for every foot that the bottom of the ladder is away from the base. How high can a 22-foot ladder safely reach up a vertical structure? ...
  6. calc

    can you just show me how to set this up? or a formula that could help? im confused. The length of a rectangle is increasing at 3 ft/min and the width is decreasing at 2 ft/min. When the length is 50 ft and the width is 20 ft, at what rate is the rectangle decreasing?
  7. hey got a question here

    hey if dy/dx= -2 why is it wrong to say that y is alwats decreasing at a rate of -2? I don't really get it. It is better to say that y is always decreasing with a slope of -2 on a graph of y(x), or at a rate of -2 per change in x. Saying that a rate is a number does not say ...
  8. Science

    Fortune teller's use crystal balls to see the future. A fortune teller has a crystal ball with an index of refraction of 1.5 and diameter of 0.2 m. You sit on one side of the ball and the fortune teller sits on the other. She holds up a small red jewel on her side in the ...
  9. CHEMISTRY

    Given assumed valencies: H=1, N=3, & C=4 i am now required to draw the structural formulae of HYDROGEN CYANIDE and CYANOGEN. H:C:::N is the Lewis electron dot structure. If you want to use "sticks" as a bond instead of two electrons, one stick stands for two electrons. H-...
  10. Math (Probability)

    A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Two cards are pulled in order, without replacement from this deck of 52 playing cards. What is the probability ...
  11. Semniar MGT

    Structure follows strategy.” Do you agree or disagree with this statement and why? It sure makes sense! It takes strategy and planning to make anything, including structures! Structures cannot be made without strategy! Good thinking In answering your own question, are you ...
  12. Math

    A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Four cards are pulled in order from this deck of 52 playing cards. What is the probability that the cards will ...
  13. Economics

    Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimated that in mass production the car would cost $40,000 per unit to build. The engineers argued that Congress should for U...
  14. CHM 157

    calculate the lattice energy of CaO
  15. Chemistry

    which has the highest lattice energy BaO or SrO
  16. math

    Use lattice multiplication to find the product. 52 × 67
  17. chemistry

    what kind of hybridization exists for each carbon in the lattice?
  18. Math

    A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Three cards are pulled in order from this deck of 52 playing cards. What is the probability that the cards will ...
  19. Relative Acidities

    Rank the given compounds on their relative acidity. Here was the order I thought it was but it turned out to be wrong. (i based it based off of sp being most acidic and sp3 being least acidic) STRONGEST HC(triple bond)C-CH3 H2C=CH2 CH3NH2 H2O CH4--> WEAKEST and then I ...
  20. Space Science

    What are some possible jobs relating to the space industry?
  21. space

    does taking a photo from outer space help earth spherical shape?
  22. science

    what is the speed needed to launch a space crop in outer space?
  23. Calculus

    explain why a scalar equation of the line exists in 2-D space, but not in 3-D space.
  24. chem

    Consider the following chemical equilibrium: SO3(g) --> SO2(g) + 1/2 O2(g) and Delta H = 98.9J i. adding oxygen gas ii. compressing the system at constant temperature iii. adding argon gas iv. removing sulfur dioxide gas v. decreasing the temperature Which of the above (i-v...
  25. Economics

    Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimated that in mass production the car would cost $40,000 per unit to build. The engineers argued that Congress should force...
  26. math

    The area of a rectangular space is 128 square feet. a. Find all the possible pairs of whole number dimensions in feet. b. Explain which pair allows enough space for a car to park. c. If the length of the space is x feet, how would you describ e the width using the area and the...
  27. Business Communications

    Crystal agreed to serve on a company’s advisory board and now has to contact them to say she cannot attend a scheduled meeting where she was to be one of the several key speakers. What should she do? a) Let the company know she cannot attend and that they will have to make ...
  28. Math

    Cashews ,Brazil nuts, and peanuts originally grew in rain forests . Anne made a trail mix with 9 cups of each . How many cups of Cashews ,Brazil nuts , and peanuts did she use in all? Answer: 9x0=0 0x9=0 Yams also grow in rain forests . Connie cooked 9 yams for thanksgiving ...
  29. English Lit

    1. What pattern or structure is there to the development the the plot? Describe the way the events are organized. Is the structure significant to the meaning? "Car Crash While Hitchhiking" -Denis Johnson
  30. space

    the pull of gravity between earth and the sun acts across how many kilometers of space.
  31. algebra

    I have a space 43 foot long, and 22 stones 10 1/2" diameter each, how far apart to space them?
  32. Calculus / a bit of physics

    explain why a scalar equation of the line exists in 2-D space, but not in 3-D space.
  33. science

    how does the electric field in space change when the air in the space is replaced be dielectric oil?
  34. Finite Math

    Assume that 3 digits are selected at random from the set {1,3,5,6,7,9} and are arranged in random order. What is the probability that the resulting 3-digit number is less than 700? I know the sample space is P(6,3) but that is all I know. Help!
  35. Physics

    A spaceship with a mass of 4.60 10^4 kg is traveling at 6.30 10^3 m/s relative to a space station. What mass will the ship have after it fires its engines in order to reach a speed of 7.84 10^3 m/s? Assume an exhaust velocity of 4.86 10^3 m/s.
  36. biology

    Choose two structures or organelles of the cell (not used in part one above.) Describe these two or organelles – what do they look like, what are they composed of? Then explain how these plant or animal cell structures or organelles function. How do these functions support ...
  37. MRI

    Hi, excuse me , can you solve this problem? You acquired an MRI image and found an aliasing artifact. Choose the one that avoids the aliasing artifact. Acquiring the MRI k-space data at a higher sampling rate Adding higher frequency components to the MRI k-space data Making ...
  38. math

    A person is standing 90 feet away from the Space Needle. The person looks up at the Space Needle at an angle of elevation of 81 degrees. The distance from the floor to the person's eye level is 5 feet. What must be the height of the Space Needle?
  39. trig

    A person is standing 90 feet away from the Space Needle. The person looks up at the Space Needle at an angle of elevation of 81 degrees. The distance from the floor to the person's eye level is 5 feet. What must be the height of the Space Needle?
  40. Physics net force and mass

    Four boxes of various masses are placed on a friction free table. Rank these boxes according to net force by listing them in order from greatest to least. A) <-5N--| 5 kg |--10N-> B) <-10N--|10kg|-15N--> C) <-10N--|5kg|-15N--> D) <-5N--|20kg|-15N--> ...
  41. Physics 11

    A 1.00 x 10^4 W electric motor is used to lift a 955 kg object vertically 25.0 m at a constant velocity in 45.0 s. What is the efficiency of the motor? I did P=W/t (1.00x10^4 x 45 =W) And got 4.50 x 10^5 Then I did Ep' = Ek 955 x 9.81 x 25 = 234213.75 But I wasn't sure what ...
  42. Physics help

    Fortune tellers use crystal balls to see the future. A fortune teller has a crystal ball with an index of refraction of 1.5 and diameter of 0.2 m. You sit on one side of the ball and the fortune teller sits on the other. She holds up a small red jewel on her side in the ...
  43. science

    how long have we been sending people into space? Or.. when did space exploration start?
  44. geet

    in 1996, sharon that spent 189 days in space that is longer than another astronaut. how many weeks was she in the space .
  45. space

    A _ has a long life cycle Theme:space and planets
  46. space

    How many socks would it take to fill the space shuttle
  47. MBA Econ

    Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimated that in mass production the car would cost $40,000 per unit to build. The engineers argued that Congress should force...
  48. economics

    engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. they estimated that in mass production the car would cost 40000 per unit to build. the engineers argued that congress should force ...
  49. Physics

    An archer's bow applies a force to an arrow over a distance of 19cm, while firing it vertically upwards. If the arrow achieves a speed of 8.0m/s and the efficiency of the bow is 75%, determine the average force applied to the arrow by the bow. So far I have the Wnet for force ...
  50. Organic Chemistry

    Consider the resonance structures for the carbonate ion. O--C-O(-) l O(-) (-)O-C--O l O(-) (-)O-C-O(-) l l O How much negative charge is on each oxygen of the carbonate ion? A)0, B) -.33, C)-.50, D) -.67, E)-1.00, F)-1.33, G)-1.50, H)-1.67, I)-2.00 What is the bond order of ...
  51. Science

    what is a crystal.
  52. Physics

    I'm trying to rank the maximum temperatures of water at 20 degrees Celsius after adding in heated copper cylinders. The first case is 1 cylinder at 22.5 degrees Celsius. Second is two cylinders at 25 degrees Celsius. Third is 3 cylinders at 25 degrees Celsius. Lastly, 1 ...
  53. english

    Well, son, I’ll tell you: Life for me ain’t been no crystal stair. It’s had tacks in it, And splinters, And boards torn up, And places with no carpet on the floor— Bare. But all the time I’se been a-climbin’ on, And reachin’ landin’s, And turnin’ corners, And...
  54. physics

    An outboard motor for a boat is cooled by lake water at 16.0°C and has a compression ratio of 13.3. Assume that the air is a diatomic gas. a) Calculate the efficiency of the engine's Otto cycle. b) Using your answer to part (a) and the fact that the efficiency of the Carnot ...
  55. physics

    An outboard motor for a boat is cooled by lake water at 16.0°C and has a compression ratio of 13.3. Assume that the air is a diatomic gas. a) Calculate the efficiency of the engine's Otto cycle. b) Using your answer to part (a) and the fact that the efficiency of the Carnot ...
  56. AP Chemistry

    Hey guys! Stuck on some problems: 1)Consider the following chemical reaction between gases: 2N2O(g) + O2(g)->4NO(g) + heat The amount of O2 at equilibrium will be decreased by: 1. Adding more NO(g). 2. Increasing the pressure by decreasing the volume. 3. Removing N2O. 4. ...
  57. Social studies

    What were some issues on which Hamilton and Jefferson disagreed? Select all that apply □ the role of the federal government □ how to structure judiciary □ imposition of taxes □ how to structure a banking system
  58. managerial economics

    Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimate that in mass production the car would cost $40,000 per unit to build. The engineers argued that Congress should force ...
  59. English- Mrs.Sue Please

    a narration essay is generally written using which organizational pattern? A.from least important to most important B. space order C.chronological D. none above
  60. math

    Use lattice multiplication to find each product 124 X 56
  61. Masinde university

    Compare the lattice energy of BaCl2 and CsCl
  62. Physics

    A steam-electric power plant delivers 900 MW of electric power. The surplus heat is exhausted into a river with a flow of 2.91×105 kg/s, causing a change in temperature of 1.07 oC. A. What is the efficiency of the power plant? B. What is the rate of the thermal source? MY ...
  63. statistics

    A survey of college students was conducted during final exam week to assess the number of cups of coffee consumed each day. The mean number of cups was 5 with a standard deviation of 1.5 cups. The distribution was normal. a. What proportion of students drank 7 or more cups of ...
  64. Chemistry

    Consider the resonance structures for the carbonate ion. O--C-O(-) l O(-) (-)O-C--O l O(-) (-)O-C-O(-) l l O How much negative charge is on each oxygen of the carbonate ion? A)0, B) -.33, C)-.50, D) -.67, E)-1.00, F)-1.33, G)-1.50, H)-1.67, I)-2.00 What is the bond order of ...
  65. Stats for Psychology

    Not sure how to rewrite this question: ht tp://img221. imageshack.us/ img221/601/question2. jpg Get rid of all the spaces to see image of question: Delete the space between ht and tp delete the space between 221. and imageshack delete the space between us/ and img delete the ...
  66. calculus

    state increasing, decreasing, max, min for f(x)= x^(1/3) (x+4) Here is my work: f'(x)= 4/3x^(1/3) + 4/3x^(-2/3) 4/3x^(1/3) + 4/3x^(-2/3)=0 x=0 x= -1 Increasing: [0, ∞) Decreasing: (-∞, 0] min @ x=0 max: none Is this correct?
  67. Homework Help: Solar Energy Please HelpASAP

    d) In the up-convertor 1, two photons are converted into one photon with 100% conversion efficiency. If all photons with energy above that of the band gap of a-SiC:H are absorbed in the a-SiC:H layer, in which spectral range can the photons be up-converted so that they ...
  68. Biology

    Bacterial cells are prokaryotic. Select two structures of bacterial cells and briefly describe them; what do they look like, what are they composed of? Then, explain how these two structures allow bacterial cells to survive as unicellular organisms. There are many examples of ...
  69. Chemistry Lewis Structure

    What is the lewis structure for In+? I have tried everything and the answer seems wrong? Please help me
  70. Thermodynamics

    A closed cycle gas turbine unit operating with max. And min. Temp. Of 760 and 20 Celsius deg has a pressure ratio of 7/1. Calculate the thermal efficiency and work ratio? Ans = 42.7 % , 0.505 My answers are : Efficiency 42.7 % which is correct.. but work ratio = 1.977. T1 and ...
  71. Space Exploration

    Space is our final frontier. Agree or disagree. Then explain I really don't know the answer to this. I don't think it is true, but then again, I'm not sure. Why I don't think it is true is because scientists are still making discoveries; they are still learning about our space...
  72. Physical Education

    "what are the properties of space and what is general space"?
  73. space

    What is the role of chemistry in outer space exploration?
  74. earth and space

    the grams on the moon is different then space ?
  75. Physics

    The space shuttle is in a 3e+5 m high orbit over the earth. The radius of the earth is 6.37e+6 m, the mass of the earth is 5.98e+24 kg. What is the distance from the center of the earth to the space shuttle? I don't know whether I would double the radius and the add the height...
  76. CHEMISTRY

    For MgSe, which crstallize structure un the rock salt structure, the unit cell edge is 5.45A. Determine the internuclear distance between neighboring Mg2+ and Se2-, as well as the cation and anion radii.
  77. biology

    The primary structure of proteins is often described as "amino acids connected like beads on a string". In this same vein, which of the following images best describes a protein's quaternary structure?
  78. finance (structure of interest rates)

    Some analysts believe that the term structure of interest reates is determined by the behavior of various types of financial institutions. this theory is called the: A. expectations hypothesis B. segmentation theory C. liquidity premium theory D. theory of industry supply and ...
  79. 10th grade

    A specific structure in a single-celled organism.How the structure is involved in the survival of the organism?
  80. chemistry

    the element germanium has a diamond-type structure.describe the structure of germanium.draw diagram
  81. science

    Is a mineral a crystal?
  82. Biology

    |Question| Living organisms are composed of millions of organic compounds, each having a unique structure. What element is responsible for this huge diversity of molecules? Describe the diversity of structures that can be formed and the properties of this element that allow ...
  83. math

    The numbers below are in order from greatest to least. 7.358 7.240 6.864 6.500 6.382 Which number would best fill the blank space? A.6.510 B.6.499 C.6.359 D.6.240 B?
  84. effective essay writing

    to develope an essay what is time order, time space and informative process?
  85. Linear Algebra

    Hello ! i try to solve Linear algebra 2 questions(but need them be written properly as mathmatical proofs) Having A matrice nXn: 1)proove that if A^2=0 the columns of matrice A are vectors in solution space of the system Ax=0 (x and 0 are vectors of course),and show that p(A)&...
  86. chemistry

    Determine the overall orders of the reactions to which the following rate laws apply: a. rate = k[NO2]^2 b. rate = k c. rate = k[H2][Br2]^1/2 d. rate = k[NO]^2[O2] I think the answers are: a. Second Order b. Zero Order c. First Order for H2 and One-half order for Br2 d. Second...
  87. Physics

    Which one of the following actions would make the maxima in the interference pattern from a grating move closer together? A.Increasing the distance to the screen. B.Increasing the number of lines per length. C.Decreasing the number of lines per length. D.Decreasing the ...
  88. English

    I've went over many search engines and I still cannot find anything to do with competetion betweeb employees can someone help thnnkx Please state your complete question. If you posted something earlier, I don't remember the question. Thanks. =) http://glinden.blogspot.com/2006...
  89. Science

    An astronaut is walking in space and his jetpack runs out of fuel. How can he use his empty pack to get back to the space station?
  90. Chem

    Does the lattice constant of a unit cell vary over isotopes? e.g Si 28 and Si 29
  91. adult education

    use lattice multiplication to find the prduct of 124 x 56
  92. chemistry

    Discuss the difference in lattice enthalpy between NaCl and CsF
  93. English

    Toss a coin. And if you get a head, move one space forward, and put a marker in the space. If you get a tail, move two spaces. Look at the word or picture on the space. By using it, make a sentence on the right side of the page. (Would you check the writing and correct errors...
  94. Physics net force and mass

    Four boxes of various masses are placed on a friction free table. Rank these boxes according to net force by listing them in order from greatest to least. A) <-5N--| 5 kg |--10N-> B) <-10N--|10kg|-15N--> C) <-10N--|5kg|-15N--> D) <-5N--|20kg|-15N--> ...
  95. PHYSICS

    The cutting tool on a lathe is given two displacements, one of magnitude 4 cm and one of magnitude 3 cm, in each one of five situations (a) through (e) diagrammed in the figure below. Rank these situations according to the magnitude of the total displacement of the tool, ...
  96. geography and history

    why was the list of the seven wonders of the world revised in the middle ages ? A:the scholars in the middle ages wanted to add structures the greeks hadnt known about. B:the scholars in the middle ages were mad that all the structures were in greece C:the scholars in the ...
  97. Science

    Why are space telescopes able to make better observations in the ultraviolet and infrared ranges than ground-based telescopes? A)space telescopes are closer to the objects that they are observing B) the atmosphere absorbs or reflects much of the UV and IR radiation C) space ...
  98. Physics Help Please

    archaeologist digging at the site of an ancient settlement discover the remains of a wooden structure. carbon 14 dating of the wood from the structure finds a decay rate of 180 decays/min. Knowing that the decay rate for living wood is 600 decays/min and the decay constant for...
  99. ap chemistry

    Given the following information, which of the following shows the acids in order from strongest to weakest? The order of atomic radii is I > Br > Cl, the order of bond strengths is HOI > HOBr > HOCl, and the order of electronegativities is Cl > Br > I.
  100. Physics

    i have a graph that shows the motion of a cyclist. as the velocity(m/s) goes up:1, 2, 3... the elapsed time(s) also increases, 2, 4, 6... when the velocity is on 2 the time is on 2, when the velocity is on 3 the time is on 4... the line that is drawn points upward my question ...
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