1. Physics

    Three solid cylinder rods roll down a hill with the same linear speed. Rod R1 has a 1inch diamter, Rod R2 has a 2inch diameter, and Rod R3 has a 3inch diameter. They all have the same masses. Rank in order the rotational energies of R!, R2, and R3. a. E1
  2. Chemistry

    List the following equilibrium solutions in order of decreasing free Ag+ concentration in mixture: 0.1M AgNO3, saturated AgCl, saturated AgBr, saturated AgI, Ah(NH3)2+, and Ag(S2O3)2 3-.
  3. Statics

    I have a structure that is constructed of circular rod that has a mass of 7 kg per meter of length. I must determine the moment Mo about O caused by the weight of the structure. From the origin (O), the structure is 2m tall (z direction), branches outward
  4. physics

    1. The efficiency of a squeaky pulley system is 73 percent. The pulleys are used to raise a mass to a certain height. What force is exerted on the machine if a rope is pulled 18.0 m in order to raise a 58 kg mass a height of 3.0 m? Answer: 13.24 N? A
  5. algebra

    Worker efficiency. In a study of worker efficiency at Wong Laboratories it was found that the number of components assembled per hour by the average worker t hours after starting work could be modeled by the formula N(t)=-3t+23t^2+8t
  6. Atomic Size

    Place the following elements in order of decreasing atomic size: selenium, chlorine, fluorine, rubidium, calcium, and sulfur.
  7. chemistry

    consider the elements;Na,Mg,Cl and F.state with reasons,which element has the highest electronegativity. 2. Arrange with reasons, the elements in decreasing order of ionization energy
  8. 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
  9. Calculus (increasing/decreasing)

    Find the interval(s) where the function is increasing and the interval(s) where it is decreasing. (Enter your answers using interval notation. If the answer cannot be expressed as an interval, enter EMPTY or ∅.) f(x) = (5 − x^2) / x my work: a)
  10. calculus

    Consider the exponential function . Which of the following best describes the the graph of g? a. Concave up and increasing b. Concave up and decreasing c. Concave down and increasing d. Concave down and decreasing The rules are +constant, concave up, -
  11. Physics

    Standing-wave vibrations are set up in a crystal goblet with four nodes and four antin- odes equally spaced around the 26.3 cm cir- cumference of its rim. If transverse waves move around the glass at 900 m/s, an opera singer would have to produce a high
  12. chemistry

    Suppose that after measuring the pH of 1.05 M HCl solution, three drops (0.20 mL) of the solution remain behind on the pH electrode. a) When this electrode is then dipped into 100 mL of pure distilled water, show by calculation that the pH of the water is
  13. Calculus

    The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400). a) Determine the legal speed speed that will maximize the fuel efficiency if the speed limit is 50 km/h. The answer is 50 km/h but my teacher said
  14. Eng

    The most important difference between an outline and finished writing is the A. grammatical structure. B. details. C. order of events. D. sources of ideas Answer is A
  15. Chemistry

    A 27 g sample of germanium crystal contains 44 mg of arsenic. The arsenic is substitutionally incorporated into the crystal. Germanium has a band gap of 0.66 eV and an intrinsic carrier concentration at 25o C of 4.2e+13 cm-3. At what temperature (in oC)
  16. math

    how many different tetrahedrons are determined by ______ given no four are coplanar? 4 points in space 9 points in space 15 points in space n points in space
  17. microeconomics

    2) Select an organization with which you are familiar. Identify the market structure of your selected organization. Evaluate the effectiveness of this structure for the organization. 3) Analyze how organizations in each market structure maximize profits
  18. us history

    describe the structure of the central(federal) government under the Articles of Confederation. What revolutionary principles were enacted though this structure? Why did the structure fail to created an enduring government?
  19. Physics

    Two 2.160 kg crystal balls are 0.870 m apart in the vertical direction. Calculate the magnitude of the gravitational force they exert on a 8.80 g marble located 0.260 m horizontally out from the center of a line that intersects the centers of the balls.
  20. Science

    Consider a lead-acid battery with 500 Ah capacity and a rated voltage of 12 V. a)What is the total capacity of energy in watt-hours that can be stored in the battery? b)Assume that the battery is completely empty. The battery is now charging at a C-rate of
  21. Math help

    How many squares in this figure? (1 point) 4.) 15 5** 20 10** Crystal wants to put a fence around her vegetable garden.Her garden is 5 ft wide and 4 ft long.She plans to put a post at each corner and at every foot.How many fence posts will Crystal need? (1
  22. anatomy

    what evidence can i get that supports the idea that bones are living, active structure rather than dead objects. http://en.wikipedia.org/wiki/Bone when there scroll to bone cells question bones are living, active structures rather than dead objects.
  23. chakraborty

    arrange the following solutions in order of decreasing specific conductance 0.01 M NaCl,0.05 M NaCl,0.1 M NaCl, 0.5 M NaCl
  24. linear algebra

    Solve using the concept of rank. Is S={−16 −7 −21,2 1 3, 21 9 2} a linearly independent set of vectors in R3? So I know how to find out if this set is linearly indep. But, I don't know how to use row rank to find this out..
  25. physics # 4

    For the following question rank the objects in order from greatest to least. 4. Which object would be the most difficult to begin spinning about its center of mass? a.) Solid sphere b.) Hollow sphere c.) Hallow cylinder d.) Solid disk e.) Solid cylinder
  26. physics

    A coal-fired electrical generating plant has an efficiency of 38%. The temperature of the steam leaving the boiler is 550 °C. What percentage of the maximum possible efficiency does this plant obtain? (Assume the temperature of the environment is 20 °C)
  27. math

    I have a diagram of an occupied building space within a larger building represented by 49 equal squares but no linear measures for the sides. The space is 120,000 sq ft. how can i estimate the lengths and widths of the floor space with just this
  28. chemistry help?!

    Which statement correctly pairs the order of a reaction with the units for the rate constant? A. third order; s/M B. zero order; 1/(M2) C. second order; 1/(M•s) D. first order; 1/M
  29. Solar Energy

    a) Consider a lead acid battery with 100Ah capacity and a rated voltage of 24V. What is the total capacity of energy in Watt-hours that can be stored in the battery? b) Assume that the battery is completely empty. The battery is now charged at a C-rate of
  30. Chemistry

    I need help with getting started: 1.The crystal structure of an ionic compound consists of alternating cations and anions lying next to each other in three dimensions. If the cation radius is 55.1% of the anion radius and the distance between the cation
  31. Statistics

    Profitability remains a challenge for banks and thrifts with less than $2 billion of assets. The business problem facing a bank analyst relates to the factors that affect return on assets(ROA), an indicator of how profitable a company is relative to its
  32. chemistry

    A) Determine the concentration in molarity (M) of a crystal violet solution based on a measured absorbance of 0.545 at 590 nm at a path length of 1.0 cm . B) Based on your determined concentration (in molarity,M), how many milligrams of crystal violet were
  33. math

    A rental agent is renting a space for $7.50 a square foot. If you require a space 36 ft. by 16 ft., what will be the rental on that space?
  34. Calculus

    find the intervals where the function is increasing and the intervals where it is decreasing f(x)= (x^3/3)-(x^2/2) ok i found its derivative which is (f1(x)=(x-1)x my options are increasing a) (0,infinity) b) (-1,0) c(-infinity,0)U(1,infinity) decreasing
  35. statistics

    for some independent data using the mann whitney test group a has rank sum of 97.5 with group size = 9 group b has a rank sum of 92.5 with a group size of 10 from the data table i have the two critical values for p=0.05 are 65 and 115 i know im supposed to
  36. stats

    for some independent data using the mann whitney test group a has rank sum of 97.5 with group size = 9 group b has a rank sum of 92.5 with a group size of 10 from the data table i have the two critical values for p=0.05 are 65 and 115 i know im supposed to
  37. Chemistry

    What is the enthalpy change (in kJ/mol) for the following process? Na+(g) + Br-(g) --> NaBr (s) Hint: use the Born-Haber cycle Note: the reference state for Br2 is Br2(l) not Br2(g) Data (in kJ/mol): enthalpy of sublimation of Na(s): 107 standard
  38. Chemistry

    Im not sure where to factor in the two longer compounds for this problem. "Rank the given compounds based ontheir relative acidities" HF H2C--CH2 NH3 CH4 HC---CCH3 This is the order i thought it was, but this isnt right apparently... (--- means triple
  39. Chemistry

    Please help I have no idea how to do this. There are three different dichloroethylenes (molecular formulaC2H2Cl2), which we can designate X, Y, and Z. Compound X has no dipole moment, but compound Z does. Compounds X and Z each combine with hydrogen to
  40. Chemistry*Dr.Bob

    I keep finding all sorts of different enthalpy of vaporizations for bromine. I used: 254.66 So factoring 254.66/2 into my equation below i ended up with a lattice energy of -863.33. Can you confirm this?
  41. Science 4th grade

    1. The cell --------surrounds the cell parts. 2. The cell --------- gives plants cells their shape. 3. --------- are structures that release energy from food. 4.----------are structures that store food, water, or wastes. ANSWERS 1. membrane 2. wall 3.
  42. Science 4th grade

    1. The cell------------ surrounds the cell parts. 2. The process of cell division is called --------------. 3. -------------are structures that release energy food. 4. --------------- are structures that stores food, water or wastes. ANSWERS. 1.wall
  43. Calculus

    Find the intervals on which the given function is increasing and decreasing. y=-x^2-2x y'=-2x-2 critical point x=-1 Increasing [-infinity,-1) Decreasing (-1,infinity] is this the correct way of writting this wiht the brackets
  44. Calculus

    find the intervals on which f is increasing and decreasing f(x)=(x-2)/(X^2-x+1)^2 I found the derivative a got a whole mess of things: ((x^2-x+1)^2-2(x^2-x+1)(2x-1)(x-2))/(x^2-x+1)^4 Do I have to use the quadratic formula to solve for the vertices to find
  45. Calculus

    Given f(x)=sin(x)-2cos(x) on the interval [0,2pi]. Determine where the function is concave up and concave down, and increasing and decreasing. I have found that the answer for decreasing is (2.68,5.82). All answers are to be in interval notation like that
  46. Algebra

    A rectangle was 25 cm longer than it was wide. A new rectangle was formed by decreasing the length by 6 cm and decreasing the width by 5 cm. The area of the new rectangle was 585 cm squared. Find the dimensions of the original rectangle.
  47. biology

    please help me unscrample the following words: (the space means thate the anagram has two words in it, but the space is not necessarily at the space) rmns teizysecntiore nt roetssieitrsic id ksdxlne so derrecisgntdie Thank you very much for your time!
  48. bus

    You have recently been hired as a new manager hired into a failing division in a company. The product line is outdated and losing market share, inter-departmental communication is adversarial, and competition for corporate funding is fierce. How are you, a
  49. business

    You have recently been hired as a new manager hired into a failing division in a company. The product line is outdated and losing market share, inter-departmental communication is adversarial, and competition for corporate funding is fierce. How are you, a
  50. english

    Analyzing English sentence structures is important for an EFL teacher because A: these structures are not universal. B: second language learners usually search for these patterns. C: understanding these patterns helps a teacher elucidate them. D: All of
  51. Science

    Which of these structures relies on the circulatory system to transport the chemical compounds that it makes to the other body structures? a- neuron b- salivary gland c- sweat gland d- pituitary gland I think it is the pituitary gland?
  52. algebra please ck.

    joe wants to spend 70. dollars at most and has 60 cu inches of space left in his soldier's care package. candy costs $7 and takes up 3 cu inch of space phone cards cost $5. and take up 15 cu in. of space. Is this correct? if not please change it or tell me
  53. economics

    Hey can someone tell me how to graph this in excel please. Thanks. Produce a chart in Excel showing TC and TR with Q on the horizontal axis. Have Q go from 0 to 15,000 units. Produce a second chart showing MC and MR with Q again on the horizontal axis.
  54. Chemistry.

    Which of the following changes will increase the amount of solid solute able to be dissolved in a liter of liquid water? decreasing pressure increasing temperature decreasing temperature increasing surface area
  55. calculus

    a rectangular room is 20 ft by 12 ft by 8 ft. If the length is decreasing by 4 inches per minute, the width is decreasing by 5 inches per minute and the height remains constant, how fast is the volume changing after 2 minutes?
  56. math

    a spherical hailstone is losing mass by melting uniformly over its surface as it falls. At a certain time, its radius is 2 cm and its volume is decreasing at the rate of o.1 cm^3/s. How fast is the radius decreasing at the time?
  57. physics

    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. I don't understand how to the find the energy output and input.
  58. physics.

    Heat engine X takes four times more energy by heat from the hot reservoir than heat engine Y. Engine X delivers two times more work, and it reject seven times more energy by heat to the cold reservoir than heat engine Y. Find the efficiency of heat engine
  59. College Economics

    Hey can someone tell me how to graph this in excel please. Thanks. Produce a chart in Excel showing TC and TR with Q on the horizontal axis. Have Q go from 0 to 15,000 units. Produce a second chart showing MC and MR with Q again on the horizontal axis.
  60. physics

    a 200 kg block was moved along an inclined plane to a height of 10m. during this process 3000J of energy was lost due to friction. a. calculate the efficiency of the inclined plane. b. what would the efficiency of the simple machine be if the incline were
  61. chemistry

    Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? increasing temperature increasing pressure decreasing surface area decreasing temperature
  62. chemistry

    Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? increasing temperature increasing pressure decreasing surface area decreasing temperature
  63. chemistry

    Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? increasing temperature increasing pressure decreasing surface area decreasing temperature
  64. Chemistry

    Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? A) increasing temperature B) increasing pressure C) decreasing surface area D) decreasing temperature
  65. algebra 1

    Bushes that bites kass kass had been doing yard work all summer to save for a new bike and ms oleonary had asked her to plant a row of barberry bushes on each side of her drive way. se specified to kass that there should be a 1 foot space between the
  66. physics modern

    1. a) If a photon and an electron each have the same energy of 20.0 eV, find the wavelength of each. b) If a photon and an electron each have the same wavelength of 250 nm, find the energy of each. c) You want to study an organic molecule that is about 250
  67. Physics

    Tree point charges(A---B---C)have equal magnitudes and are located on the same line.? The separation d btw A and B is the same as btw B and C. A is +, B/C are -. Consider the net electrostatic force that each charge experience due to the other two charges.
  68. Business

    TCO 1) Employers provide tools and technology for their employees in order to: a. increase the cost of production and profitability. b. improve their efficiency and productivity. c. to reduce corruption in business and eliminate scandals. d. encourage the
  69. Science ~ Structures and Properties of Matter

    1) Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can be separated by
  70. physical

    Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the list below which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the
  71. Chem21

    Rank these gases in order of increasing standard molar entropy: Column preview Smallest S Br2(g) Second smallest S F2(g) Second largest S I2(g) Largest S Cl2(g) Matching pairs Smallest S Second smallest S Second largest S Largest S
  72. math

    Dave swam 6 laps and did 9 dives at the swimming pool.crystal did 4 drives and swam 8 laps.how many more laps than drives did crystal and Dave do?
  73. College Chemistry

    Please help I have no idea how to do this. There are three different dichloroethylenes (molecular formulaC2H2Cl2), which we can designate X, Y, and Z. Compound X has no dipole moment, but compound Z does. Compounds X and Z each combine with hydrogen to
  74. Chem

    Please help I have no idea how to do this. There are three different dichloroethylenes (molecular formulaC2H2Cl2), which we can designate X, Y, and Z. Compound X has no dipole moment, but compound Z does. Compounds X and Z each combine with hydrogen to
  75. Physics

    Futurists project large space stations which would rotate so as to use centripetal acceleration to simulate gravity. The outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor
  76. Biology

    In the small intestine, the digestion of food molecules is completed and absorption occurs. Structures from the circulatory system are associated with the small intestine. Explain how these structures assist the small intestine in its function.
  77. Chemistry

    I need help with getting started: 1.The crystal structure of an ionic compound consists of alternating cations and anions lying next to each other in three dimensions. If the cation radius is 55.1% of the anion radius and the distance between the cation
  78. Data Structures and Algorithms

    Given integers R,M with M≠0, let S(R,M) denote the smallest positive integer x satisfying the congruence Rx≡1(mod M) if such an x exists. If such an x does not exist, put S(R,M)=0. Each line of this text file contains a pair of space separated
  79. ryan

    You propose to build a space ship that allows the entire population of the United States (280 million) to leave earth. Your plans allocate an average space of 1,000(=10*10*10) cubic feet to each person. You space ship is going to have the shape of a
  80. problem solving

    kirk grew a crystal in science class. On monday it was 13/16 inch tall. it had grown 1/4 inch bet friday and monday. It had grown 1/2 inch between Tues and Fri. How tall was Kirk'a crystal on Tues?
  81. economics

    Where does Bexar County rank among texas counties in per capita income? <br><br> Where does Cameron County rank among texas counties in per capita income? <br><br> what was the inflation rate in hungary in 1945-1946?
  82. Chemistry

    Consider the following data. DeltaHf (Na2O (s))=-414kJ/mol Delta H sublimation(Na)=109 kJ/mol I.E. (Na)=495 kJ/mol Bond Energy (O2) = 495 kJ/mol E.A. (O) = -141 kJ/mol E.A. (O -) = 878 kJ/mol Use this information to calculate the lattice energy of Na2O
  83. UCI Chemistry Webworks

    SPARTAN: Using the bond lengths recorded in Table II determine bond order and the major resonance structures of the following: A. For CVOH, the C-C bonds are longer than the bond lengths found in . (Use i, ii, iv, etc. for your answer) B. For CVOH, the C-N
  84. Calculus

    The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400) a) determine the legal speed that will maximize the fuel efficiency using speed limit of 50 km/h
  85. Civics

    The Tampa Port Authority is one of the largest ports in Florida. It has been given the designation of special purpose district by the local government in order to increase efficiency. Why are special purpose districts created? Pls help lol.
  86. Stats....plz help....

    Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your work. 0 1 6 8 9 9 8 6 3 1 0 9 How do i find the position and value of the 56th percentile??
  87. AP Chemistry

    Rank these compounds in order of increasing hyroxide ion concentration: weak base, weak acid, strong base, strong acid.
  88. 3rd Grade Math

    Dave swam 6 laps and did 9 dives at the swimming pool. Crystal did 4 dives and swam 8 laps. How many more laps than dives did Crystal and Dave do?
  89. class rank

    what does the class rank 1 out of 120 mean?
  90. english

    I think that paragraph 3 is more effective than paragraph 1 because it is structured in a better manner and has better rhythm than paragraph1. It also has better structures sentences than paragraph 1. For example in paragraph 1 sentences like, ‘My Aunt
  91. Economics

    What is an oligopoly? A. An agreement by a formal organization of producers to coordinate prices and production B A market structure in which a few large firms dominate the market C A market structure in which two firms have a price way D a market
  92. Science

    Zygomycota; 12. Vertical hyphae produce what structures? 13. What is the function of these structures? Sexual Reproduction In Zygomycota; 16. Sexual reproduction is only possible in Rhizopus if what is true?
  93. Analytical CHM

    Rank the following items in order of accuracy when they are used for their intended purpose: Volumetric pipet, beaker, Erlenmeyer flask, MOHR pipet, graduated cylinder, volumetric flask, buret. Explain your asnwer below Most accurate 1. 2. 3. 4. 5. 6.
  94. physics

    Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the
  95. science

    Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the
  96. physic

    Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the list below which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the
  97. biochem

    I'm stuck on this question, not sure where to start. can you show detail and explain so that it helps me to understand it. help please, thanks. The value of delta G for the conversion of 3-phosphoglycerate to 2-phosphoglycerate (2PG) is +4.4kj/mol. If the
  98. calculus

    A particle moves along the x-axis so that at time t its position is given by s(t) = (t + 3)(t −1)^3, t > 0. For what values of t is the velocity of the particle decreasing? 0 < t < 1 t > 1 t > 0 The velocity is never decreasing
  99. Intercultural Communication

    what a U.S. manager would need to know about such issues as personal space and rules of social behavior in order to successfully conduct business in China?
  100. Studying Cultures

    what a U.S. manager would need to know about such issues as personal space and rules of social behavior in order to successfully conduct business in India?