Questions Asked on
January 12, 2013

  1. math

    How many equilateral triangles in the plane have two vertices in the set {(0,0), (0,1),(1,0),(1,1)}?

    asked by meep
  2. Biology

    Why DNA is more stable than RNA?

    asked by Mengistu
  3. Math

    For each geometric series, calculate t6 and S6. a) 6 + 30 + 150 ... So I'm not exactly looking for an answer to this question but I was wondering why they want you to find t6 too? Would finding out t6 (via general formula) help in any way when finding S6?

    asked by Crystal
  4. Math

    Natalia picked 7 1/6 bushels of apples today and 4 5/8 bushels yesterday. How much more did she pick today?

    asked by Anonymous
  5. Physics

    A 93 kg clock initially at rest on a horizontal floor requires a 614 N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 510 N keeps it moving with a constant velocity. Find μs between the clock and the floor. Find

    asked by Josh Templin
  6. physics

    A 500 g piece of silver at 150 degree Celsius is submerged in 1000 g of water at 5 degree Celsius to be cooled. determine the final temperature of silver and water given Cwater = 4.18 x 10 ^3 J/kg degree Celsius Csilver = 2.4 x 10^2 J/kg degree Celsius

    asked by tobby
  7. maths

    If P(x,y),F1(3,0), F2(-3,0) a nd 16x^2+25y^2=400, then find PF1+PF2.

    asked by Anonymous
  8. Geology

    There is also a graph i can't move it. Building Isochrons and Determining the Ages of Three Rocks Page 15 of 17 For each of the three rocks listed below follow these steps to determine the rock's age of formation. 1. Prepare an isochron by plotting the

    asked by Robin
  9. Physics

    A 4.3 kg bag of groceries is in equilibrium on an incline of angle θ = 30°. Find the magnitude of the normal force on the bag.

    asked by Josh Templin
  10. English

    What 3 elements and introductory paragraph in an essay have? 1 hook 2 thesis statement 3????????

    asked by Darcy
  11. CJ 216

    Discuss the possible communication methods between the officer and his/her agency.

    asked by KARINA
  12. physics

    A block of mass 2 kg is connected to a freely hanging block of mass 4 kg by a light and inextensible string which passes over pulley at the edge of a table. The 2 kg mass is on the surface of the table assumed to be smooth. Calculate the acceleration of

    asked by Samuel
  13. Statistics

    Which of the following statements are true about matched pairs analysis? I. In a matched pair analysis you use a single-sample procedure. The sample is made up of the difference between pairs of observations. II. In a matched pairs analysis the two

    asked by Meow
  14. chemistry

    (a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of

    asked by ani
  15. chemistryy

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 4.548 x 10^-10m. Determine the frequency (in hz) of the interacting photon. i got

    asked by p
  16. physics

    A 0.155 kg baseball is thrown upward with an initial speed of 14.5 m/s. What is the force on the ball when it reaches half of its maximum height? (Disregard friction.) What is the force on the ball when it reaches its peak?

    asked by Dylan G.
  17. Earth Science

    Quartz is made up of___________ a.)silicon and oxygen b.)iron and oxygen c.)silicon and carbon d.)iron and silicon

    asked by ?
  18. assembler language

    write an assembly language subordinate count according to these specs: accepts a pointer to an array or signed words in register X. Accepts a word value in register Y, which indicates the number of array elementsl Returns the number (i.e. count) of nonzero

    asked by chris
  19. Statistics

    Classify the following as an example of nominal, ordinal, interval, or ratio level of measurement, and state why it representa this level: heights of 40 high school students.

    asked by Karen
  20. physics

    a worker lays a rubber handled 0.500kg hammer down a sloped roof. it slides down the roof to a level portion of the roof where it slides another 2.oo m long this horizontal surface. the coefficient of friction between the rubber handle and the shingles is

    asked by teed
  21. physics

    a 10kg toy mootorized boat uses 2.0 W of power, has a constant accel from rest and reaches a certain speed in 10 s on a horizontal surface. what was the final speed ?

    asked by teryko
  22. math

    Daniel will randomly pick a marble from a bag that has three red marbles and six white. If he does not put any marble back into the bag and picks a new one each time, what is the probability that both marbles will be white. If he puts the first marble back

    asked by meep
  23. math

    Jamia is deciding between two long-distance telephone plans: • Plan A charges $5 per month plus 6¢/min. • Plan B charges $20 per month plus 1¢/min. Jamia usually makes about 200 min of long distance calls each month. Which plan costs less? Show your

    asked by jenny
  24. chemistry

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

    asked by Anonychem
  25. Math

    Determine the sum of the first 20 terms of the arithmetic sequence in which ... f) the 7th term is 43 and the 13th term is 109 I know you can make two equations : 43 = a + 6d and 109 = a + 12 d And subtract them to get d = 11 But I know there's another way

    asked by Crystal
  26. Chemistry

    (a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of

    asked by markus
  27. Math

    Determine the sum of the first seven terms of the geometric series in which ... F) t5 = 5 and t8 = -40 I'm stuck on this one!

    asked by Crystal
  28. math

    Maria normally spends a half-hour driving to work. When her average speed is ten miles per hour slower than usual, the trip takes ten minutes longer. How many miles does she drive to work?

    asked by meep
  29. Chemistry

    Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material. Calculate the absorption edge of this material. Express your answer as a wavenumber in units

    asked by Ankur
  30. Math

    A clothing store ordered 300 sweaters and sold 20 of them at $100 the first week. The second week, the selling price was lowered by $10, and 40 sweaters were sold. In the third week. The selling price was lowered by another $10, and 60 sweated were sold.

    asked by Crystal
  31. Chemistry

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

    asked by Ankur
  32. social studies

    i have to make a slideshow on urbanization in africa and i need help

    asked by Gabby
  33. Math

    Given the following question: -3e^(-2*t)*sin(pi*t + pi/3)] How do I find a) period b) frequency c) time (phase) shift d) time constant

    asked by Jen
  34. physics

    In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?

    asked by PLEASE HELPPP
  35. math

    If "today is Monday" is true and "It is May 5th is false, which of the following is false? 1 - Today is Monday and it is not May 5th. 2 - If today is Monday, then it is May 5th. 3 - Today is not Monday only if it is May 5th. 4. Today is not Monday or it is

    asked by liza
  36. Chemistry

    The silicon wafer is coated with a layer of metallic aluminum which acts as an electrical contact. The x-ray diffraction pattern of aluminum is measured in a diffractometer with Fe Kα radiation. At what angle, θ, do you expect to observe the first

    asked by bs
  37. difficult chemistry

    100 Liters of air at STP is slowly bubbled through 200ml of 0.03N Ba(OH)2 solution. The Baco3 formed due to reaction is filtered and few drops of phenolphthalein is added to the solution rendering it pink. The solution required 25ml of 0.2N HCL solution

    asked by Fai
  38. difficult chemistry

    Calculate the molarity of thiosulfate solution if 0.400mg of Kl03 required 100ml of the thiosulfate solution provided that excess kl and hcl were added. Who helps me

    asked by Fai
  39. Math

    Find the domain of the expression 4x^2-10x+3 and is this factorable?

    asked by Justin timberlake
  40. Physics

    Two forces are applied to a car in an effort to accelerate it, as shown below. The first force, F1 = 364 N, is applied at an angle α = 33° to the forward dashed line. The second force, F2 = 522 N, is applied at an angle β = 11° to the forward dashed

    asked by Dave Lynn
  41. difficult chemistry

    502g sample of dry cac03 and cacl2 mixture was dissolved in 25ml of 0.925 M HCL solution. What was cacl2 percentage in original sample if 22ml of 0.09312 m NAOH was used to titrated excess HCL? The answer 29.89% Who helps me

    asked by Fai
  42. PHYSICS

    Determine the normal force for a laundry basket with a mass of 5.8 kg in each of the following situations (a) at rest on a horizontal surface (b) at rest on a ramp inclined at 12° above the horizontal (c) at rest on a ramp inclined at 25° above the

    asked by Meg Peterson
  43. physics

    A box slides down a 26° ramp with an acceleration of 1.19 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.μk =

    asked by Amy Lee
  44. physics

    A 3.40 kg block is pushed along the ceiling with an constant applied force of F = 82.0 N that acts at an angle θ = 50° with the horizontal, as in the figure below. The block accelerates to the right at 5.80 m/s2. Determine the coefficient of kinetic

    asked by Amy Lee
  45. Physics

    A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 188.0 N at an angle of 26° with the horizontal. The box has a mass of 30 kg, and the coefficient of kinetic friction between the box and

    asked by T.J.
  46. science

    How are cyclones formed

    asked by Anonymous
  47. physics

    A 1060 N crate is being pulled across a level floor by a force F of 300 N at an angle of 35° above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. Find the magnitude of the acceleration of the crate. answer in

    asked by Lauren Miller
  48. science

    How are cyclones formed

    asked by Anonymous
  49. reading

    where do you put a comma in have you chosen what you are going to wear on opening night?

    asked by a
  50. Health

    How does society define health

    asked by Kathy
  51. Health

    What is the correlation on how society defines health and how they pursue health

    asked by Kathy
  52. physics

    Suppose the charge q2 in the figure below can be moved left or right along the line connecting the charges q1 and q3. Given that q = +15 µC, find the distance from q1 where q2 experiences a net electrostatic force of zero? (The charges q1 and q3 are

    asked by stoic-rider77
  53. THEORY OF MACHINE

    A steel bar 10 m long and 10 cm * 2.5 cm in section. It is subjected to axial pull of 250 KN. Determine the intensities of normal and tangential stresses on a plane section at 60 degree to the longitudinal axis.

    asked by rajesh jain
  54. THEORY OF MACHINE

    A mild steel rod is 150 cm long. The portion 80 cm long is 22 mm diameter and the remaining length is 20 mm diameter. If the total change in length is 0.072 cm, Determine the changes of each part in 1) Length, 2) Diameter, 3) Volume. Take poissions ratio=

    asked by rajesh jain
  55. ENGLISH

    I Need Someone to check my essay for me and give me some input please.

    asked by STACY
  56. THEORY OF MACHINE

    A piece of material subjected to three mutually perpendicular stresses of 70, 56 and 84 MPa. If E= 200 Gpa, Poissions ratio= 0.28 Determine 1) Principal strains 2) Shear modulus 3) Bulk modulus.

    asked by rajesh jain
  57. English/Essay

    Could someone tell me if I have done my essay the right way? Please its due Monday?? "The internet is a much easier resource for students than a library” The first reason the internet is a much easier resource for students than a library, you can Find

    asked by Jake
  58. geometry

    What do you do to figure out space in irregular shapes?

    asked by Mommy
  59. THEORY OF MACHINE

    A steel block 200 mm * 20 mm* 20 mm is subjected to a tensile force of 40 KN in the direction of its length. Determine the change in volume, if E is 205 KN/mm² poissions ratio = 0.3

    asked by rajesh jain
  60. Math precalculus II

    The area of a sector of a circle with a central angle of 15π rad is 18 m². Find the radius of the circle. I set up my equation as: 18m^2=(1/2)(r^2)(1/5 pi) i isolate r^2 by dividing both sides by (1/2) and (1/5 pi, getting: 180pim^2=r^2 i then take the

    asked by Brendy
  61. Reading/Language Arts

    I,m writing a paragraph about using resources responsibly.And I have to use three vocabulary words adverse,generate,apparatus. And this is what I wrote. The energy to the house I live in has had a adverse affect.Do to the apparatus not getting enough

    asked by Ana
  62. Chemistry

    The solubility of bismuth iodide (BiI3) in water is 8.491 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)

    asked by yolo
  63. THEORY OF MACHINE

    The principal stresses at a certain point in a strained material are 150 MPa and 48 Mpa both tensile. Find normal and tangential stresses on a plane inclined at 20 degree with the major principal plane.

    asked by rajesh jain
  64. chemistry

    To what volume should you dilute 50.5 of a 4.60 solution so that 30.0 of the diluted solution contains 3.30 of

    asked by Nicole
  65. chemistry

    To what volume should you dilute 50.5 of a 4.60 solution so that 30.0 of the diluted solution contains 3.30 of KI?

    asked by Tata
  66. math (double checking)

    I've posted this question before but I forgot to say that I was dealing with polynomial inequalities (not sure if that makes a difference) The question is: Solve the following polynomial inequalities. (9 marks) 4x - 5 ≤ 2(x - 7) x^3 - 5x^2 + 2x ≥ -8

    asked by Anonymous
  67. To rajesh jain

    Do not post any question more than once. Currently, I don't see any physics tutors online. Please be patient and wait for them to find what you have already posted.

    asked by Writeacher
  68. physics

    an object's acceleration is given by the function a= 2/v^2, determine an expression for the velocity of the object as a function of time. (at t= 0, v=0)

    asked by Kiana
  69. physics

    an object's acceleration is given by the function a= 2/v^2, determine an expression for the velocity of the object as a function of time. (at t= 0, v=0)

    asked by Kiana
  70. Math

    Could someone pls. help me out on the following question: find the producers surplus (to the nearest dollar ) at a price level of p=$26 for the price-supply equation p = s(x)= 5ln(x+1) . An early response would be greatly appreciated pls. Thank you.

    asked by Jim
  71. Algebra 2

    Two days ago "Steve" helped me with this problem. I am grateful to him. I didn't get it and asked for him to help me again. He showed it to me again, but I needed more steps shown. Then I think he was finished for tutoring for the day before I could see it

    asked by Bart
  72. physics

    an electron with a mass of 9.11 x 10^-31 kg is accelerated from rest across a set of 150 V and are separated by 0.80 cm. a) determine the kinetic energy of the electron after it crosses between the plates.( ans 2.4 * 10^-17 j) b) determine the final speed

    asked by David
  73. Algebra

    How do you factor this problem x^2 + 4x = 4

    asked by Cory A
  74. English

    This sentence has an error but I'm not sure if this is correct. His father and uncle were theirselves great travelers. Is it suppose to be: His father and uncle were themselves great travelers.

    asked by Emma
  75. physics

    sphere A has a mass of 4.2*10^-2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is o.23 m from sphere A a) determine the angle between the thread and the wall

    asked by ali
  76. Earth science

    What is the primary cause of crustal movement?

    asked by ?
  77. math

    If "today is Monday" is true and "It is May 5th is false, which of the following is false? 1 - Today is Monday and it is not May 5th. 2 - If today is Monday, then it is May 5th. 3 - Today is not Monday only if it is May 5th. 4. Today is not Monday or it is

    asked by dana
  78. Algebra

    You are right I was suppose to factor the perfect squares for x^2 + 4x + 4 Thanks for you help.

    asked by Cory A
  79. Earth science

    Which of the following is MOST similar between the inner and outer core of the Earth? a.)composition b.)pressure c.)movement d.)density

    asked by ?
  80. Earth science

    The inner core of the Earth is solid because of increased___________ a.)density and composition b.)density and temperature c.)temperature and pressure d.)pressure and density

    asked by ?
  81. physics

    Two charges are placed on the x axis. One of the charges (q1 = +7.91C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x =

    asked by Anonymous
  82. physics PLEASE HELP

    Two charges are placed on the x axis. One of the charges (q1 = +7.91C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x =

    asked by Anonymous
  83. Math HELP PLEASE

    1.My family went to starbucks. My daughter and myself ordered drinks that were the same price. My son's drink was 5.00 dollars more than my drink. The total bill was $18.50. How much was each drink? 2.There were candies on the table. Andy grabbed 50% of

    asked by Louis
  84. Earth Science

    Seismic waves move faster through which of the following media? a.) water b.) steel c.) oxygen d.) oil Please answer my study guide is due Monday and the teacher hasn't gone over this I looked through my notes and everything. It would really help if you

    asked by ?
  85. college algebra

    What are the zeroes of f(x) = 2x^2 -3x + 1

    asked by Sydney
  86. math

    The ratio of guests under 15 to the total number of guests is 1:2. How many guests are under 15? The answer is five. Am I correct. Table Age Range Guest Under 15 X 15-40 6 41-65 3 Over 65 2

    asked by Americal
  87. math

    help me solve: find x in cos^2x - 2 sinx cosx - sin^2x = 0

    asked by gopi
  88. Math

    A pizza box with a square base is to be made rom a rectangular sheet of cardborad by cutting six 1-inch squares from the corners and the middle sections and folding up the sides. If area of the base is to be 144 in^2, what piece of cardboard should be

    asked by Barb
  89. med. terminology

    i am having some trouble, i have found some of the mistake but seem like i cant finf the rest: CHIEF COMPLAINT: This 53-year-old man visited the outpatient clinic for dyspnea and recurrent coughing. HISTORY OF PRESENT ILLNESS: This patient has a long

    asked by holly
  90. Math

    Okay, so I know this should be really easy but my mind is just drawing a blank: For each series, calculate t12 and S12 a) 37 + 41 + 45 + 49 + ... Okay so I calculated S12 to be 708, and I know that's right. For t12, I know I can easily find the general

    asked by Crystal
  91. Information Literacy

    Which of the following sets of Library of Congress call numbers is in the correct order? A. E88 G2512 S57 1998, E88 G62 D225, E88 G62 L166 1995, E88 G62 L45 B. E88 G62 L166 1995, E88 G62 L45, E88 G62 D225, E88 G2512 S57 1998 C. E88 G2512 S57 1998, E88 G62

    asked by Jordan
  92. math

    there are 10 beads in a jar 5 are green 3 brown and 2 red if joseph randomly picks one bead three times what is the probability that all three of the beads will be brown

    asked by meep
  93. physics

    A 200.0 N force moves a 120.0 kg crate on a friction less surface from rest to final speed of 9.6 m/s. what is the displacement of the crate at the time it reaches this speed ?

    asked by tommy
  94. Algebra

    find the slope -intercept form for 2x+6y=11

    asked by linda
  95. chemistry

    what is the ph of a soln that contain 0.01M HNO3 and 0.1M CH3COOH. for acetic acid,ka=1.8*10-5

    asked by Anonymous
  96. physics

    a 2.0 kg bad is held by a string to the ceiling . A 10 g bullet traveling at 200 m/s strikes the stationary bag. the height after the collision is 10.0 cm. assuming there is no friction, determine the speed, in meters per second, of the bag after the

    asked by terry
  97. language arts

    whats a sentence for lukewarm that includes a synonym for the word to help provide a contect clue?

    asked by destiny
  98. physics

    a mechanic uses a chain and bloc pulley to lift a 875-kg engine 4.0 m to the top of the garage. the downward force on the chain over the 4.0 m distance is 5.0 x 10^4 N. a)calculate the work done in raseing the motor b)how much useful work was done c)what

    asked by tyler
  99. math

    5/6 x 10/23 how do i find the simplest form. thank you

    asked by kevin
  100. Math Urgent 1 tiny question

    how would you write (11/20)^-6 as a single power... don't evaluate.

    asked by Sarsh
  101. Math

    Which of the following equations has an infinite number of solutions? (1 point) 3x – 3 = –4x 2y + 4 – y = 16 7x + 5 = 4x + 5 + 3x 6y – 2 = 2(y – 1) i need help plz

    asked by plz help
  102. physics

    an elevator motor provides 45 W of power while lifting a 2000 kg elevator 35 m. if the elevator contains six passengers of the same mass and it takes 20.0 to accomplish this task, determine pass of each passenger.

    asked by tanya
  103. Probability-Math

    Please forgive me for posting this for the 3rd time but I really need to learn this: A researcher conducted a study of the access speed of 45 hard drives and concluded that his maximum error of estimate was 28. If he were to conduct a second study to

    asked by Alia
  104. physics

    a farmer drives a 0.100 kg iron spike with a 2.00 kg sledge hammer. the sledge hammer moves at a speed of 3.00 m/s and comes to rest on the spike after each swing. assuming all the energy is absorbed by the nail and ignoring the work by the nail, how much

    asked by tulip
  105. Math

    Hi. How to you solve 6.3*10^-4=4x^3 on a calculator? What buttons or functions do you press on the calculator to solve this

    asked by Ted
  106. 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

    asked by shantia
  107. Math

    Hi. How to you solve 6.3*10^-4=4x^3 on a calculator? What buttons or functions do you press on the calculator to solve this

    asked by Ted
  108. help

    4x + 2 = x + 8. (1 point) x = 4 x = 3 x = 2 x = 1 i need help...

    asked by plz help
  109. algebra

    Find the rate of change for the equation 5x+3y=-2

    asked by Karla Sarmienta
  110. Physics

    The instruments attached to a weather balloon have a mass of 5.2 kg. The balloon is released and exerts an upward force of 98 n on the instruments. A)what is the acceleration of the balloon and instruments? B) after the balloon has accelerated for 10s, the

    asked by Jules
  111. algebra

    write an equation in slope intercept form ha an x-intercept of 6 and y intercept of 3

    asked by austin
  112. math

    Five boys and seven girls in a history class will go on a field trip during the Easter vacation. They make a committee of three members to prepare for the trip. What is the probability that this committee will consist of three boys? What is the probability

    asked by meep
  113. biology honors

    In which tissue of plants are new cells created? A.dermal B.vascular C.ground D.meristematic

    asked by shantia
  114. maths

    find factors of 17^100 + 32^201

    asked by Anonymous
  115. mec 112

    A 10kg trunk lies on a horizontal rough floor,the coefficient of friction between the trunk and the floor is 0.75. Calculate magnitude of force P which is necessary to pull the trunk horizontally if the P is applied horizontally and at 30 degrees above the

    asked by anu
  116. geometry

    Write an equation of a circle with diameter AB.A(0,0),B(-6,8)

    asked by shantia
  117. science

    The rate constants for a first order decay reaction are found to be:

    asked by hermy
  118. geometry

    Write an equation of a circle with diameter AB.A(0,0),B(-6,8)

    asked by shantia
  119. science

    Estimate the Cl-As-F bond angle

    asked by harry
  120. Analytic geometry

    What is the distance of the line x+6y-7=0 from the origin? Please help, is my answer -7sqrt37/37 correct? If not, please help me whats the right solution

    asked by Xavier
  121. biology honors

    In which tissue of plants are new cells created? A.dermal B.vascular C.ground D.meristematic

    asked by shantia
  122. science

    What is the pH of 50 mL of a 0.2M glycolic acid aqueous solution after adding 5 mL of 0.25 M KOH? The pKa of glycolic acis is 3.83 at 25 .

    asked by harry
  123. science

    Calculate the surface energy of the (100) surface of niobium. The enthalpy of atomization of niobium is 745 kJ/mole. Express your answer in units of J/cm2.

    asked by harry
  124. Math

    Find the equation of straigt line whose one cordinate is (2,3) and slope is 2

    asked by Anonymous
  125. science

    What is the degree of polymerization, n, of polypropylene with a molecular weight of 600,000 g/mole?

    asked by harry
  126. chemistry

    (f) How much oil will dissolve in the surfactant-water solution if the concentration of surfactant falls in region A?

    asked by schoolgirl
  127. chemistry

    If the diffusivity is observed to double when the temperature is increased by 10 degrees C, what is the activation energy for diffusion? Express your answer in units of eV.

    asked by Anonychem
  128. chemistry

    (b) Calculate the absorption edge of this material. Express your answer as a wavenumber in units of inverse meters.

    asked by schoolgirl
  129. chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 3.188×10−10 m. Determine the frequency (in hz) of the interacting photon. Please help!

    asked by Anonychem
  130. chemistry

    The silicon wafer is coated with a layer of metallic aluminum which acts as an electrical contact. The x-ray diffraction pattern of aluminum is measured in a diffractometer with Fe Kα radiation. At what angle, θ, do you expect to observe the first

    asked by Anonychem
  131. science

    A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2

    asked by harry
  132. chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 207.0 kg of PbS and 310 kg of PbO. Please help!!!

    asked by Anonychem
  133. Chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 0.468×10−10 m. Determine the frequency (in hz) of the interacting photon.

    asked by Ankur
  134. chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 1.828×10−10 m. Determine the frequency (in hz) of the interacting photon.

    asked by ani
  135. chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 3.188×10−10 m. Determine the frequency (in hz) of the interacting photon.

    asked by howard
  136. physics

    A solid sphere of mass m and radius r rolls with out slipping along the track.it starts from rest with the lowest point of tthe sphere at aheight h above the bottom of the loop of radius R,much larger than r.(a) what is the minimum value of h (interms of

    asked by Anonymous
  137. computers

    What is the code to unlock the elite puffle on club penguin? P.S: This is very important to me so please give me the code.

    asked by Anonymous
  138. science

    Which is the higher density of polyethylene, linear or branched? Select the choice with the best accompanying explanation

    asked by harry
  139. English

    Harmatan weather

    asked by Anonymous
  140. science

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of . Determine the frequency (in hz) of the interacting photon.

    asked by cristie
  141. math

    1. How could you use the product of 1/2 and 200 to find the product of 1/8 of 200? 2. How could you use the product of 1/3 of 300 to find the product of 1/6 and 300?

    asked by Anonymous
  142. information leteracy

    Which of the following sets of Library of Congress call numbers is in the correct order? A. E88 G62 L166 1995, E88 G62 L45, E88 G62 D225, E88 G2512 S57 1998 B. E88 G2512 S57 1998, E88 G62 D225, E88 G62 L45, E88 G62 L166 1995 C. E88 G62 D225, E88 G62 L166

    asked by Jun Siona
  143. science

    Shown below is a rough sketch of the unary phase diagram (pressure vs. temperature) for carbon dioxide , dry ice. Note the diagram is not drawn to scale and contains breaks in the axes to signify this. Using the diagram, answer the following questions

    asked by cristie
  144. math

    Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20

    asked by Larry
  145. math

    Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20

    asked by Larry
  146. science

    What is the distance between second nearest neighbor atoms in vanadium? Express your answer in cm

    asked by minis
  147. Math

    Is there a way to find the term number of a sum in an arithmetic series? Like if you had the sum of the first 12 terms in a series could you find the term value of term 12 using the sum? For example in one of my previous questions : For each series,

    asked by Crystal
  148. science

    8. Which of the following related subjects is listed as a broader term? A. Palynology B. Phytogeography C. Paleontology D. Paleoclimatology

    asked by Junbhe
  149. Maths

    For logarithms, if asked to write in simplest form, is it better to write the argument in radical form or exponential form.

    asked by Gabriel
  150. chem-

    Draw the structures of the two monomers that yield Nomex®. can someone show me?

    asked by Samantha
  151. science

    The solubility of bismuth iodide in water is 4.291 x 10-3 M. Calculate the value of the solubility product. The dissolution products are and

    asked by minis
  152. Math

    A 100m wire weighs 1.75kg. How wide is the wire?

    asked by Bethany
  153. Science

    In the subject guide search on EDSeek's Home page, enter the following subject term: paleobotany. Based on the results from this search, choose the best answer to this question. 8. Which of the following related subjects is listed as a broader term? A.

    asked by Junbhe
  154. science

    Do you expect the solubility of in 0.1 M to be equal to, greater than, or less than that of in water? Explain

    asked by minis
  155. science

    Do you expect the solubility of in 0.1 M to be equal to, greater than, or less than that of in water? Explain

    asked by minis
  156. information leteracy

    locate the Web site for the school's accrediting body, which is listed by the U.S. Department of Education as a nationally recognized accrediting agency.

    asked by Junbhe
  157. Information Leteracy

    When books are arranged in correct order on the shelves by call number, which of the following call numbers will be first? A. DA 546 .L74 1986 B. D 839 .G3 1987 C. D 839 .G42 2004 D. DE 82 .A49 2006

    asked by Junbhe
  158. Information Leteracy

    Which of the following would be the best way to get to a list of encyclopedias that are available on the Web? A. Look at the Library of Congress Web site. B. Visit the Internet Public Library. C. Search the library catalog. D. Search a periodical database.

    asked by Junbhe
  159. math

    Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20

    asked by Larry
  160. Information leteracy

    The Atlas of World Religions is an example of which of the following reference sources? A. General almanac B. Historical atlas C. Subject-specific atlas D. General world atlas

    asked by Junbhe
  161. Information leteracy

    Which one of the following services is provided through the Ask-a-Librarian feature in the Penn Foster Library? A. A full list of materials you’ll need for your research B. An analysis of an issue presented in your course C. A historical date or the

    asked by Junbhe
  162. chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 5.908×10−10 m. Determine the frequency (in hz) of the interacting photon.

    asked by Blair
  163. information Leteracy

    To determine the best place to begin your online research, you should first A. identify keywords and search terms. B. settle on a single, concise search term or phrase. C. choose several verbs and modifiers to help define your search. D. formulate your

    asked by Junbhe
  164. information Leteracy

    To critically evaluate the qualifications of an author on a topic, carefully consider all of the following except the A. number and type of awards the author has received. B. author's educational background. C. other articles the author has written. D.

    asked by Junbhe
  165. 1/90

    What will be the next. Result of wining machine 85 20 34 65 90-78 18 83 27 17

    asked by anthony
  166. Information Leteracy

    Government documents in a library are classified according to which of the following schemes? A. Superintendent of Documents B. Dewey Decimal C. Library of Congress D. Government Printing Office

    asked by Junbhe
  167. Chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 3.188×10−10 m. Determine the frequency (in hz) of the interacting photon.

    asked by selly
  168. math

    6y - 12 = -2x

    asked by Kirstin
  169. math

    Write the equation in standard form, 6y - 12 = -2x

    asked by Kirstin
  170. Statistics

    Which of the following statements is not true about samples that can be treated as matched pairs data? I. Data collected on these samples is analyzed by calculating the differences between paired observations and using that data in one sample tests. II.

    asked by Meow
  171. MATH HELP!!!!!!

    how would I solve the problem, 10=2/7n+4 ? Please I need help!!!!!!!!!!!!!!!!!!!

    asked by Emi
  172. chemistry

    The solubility of bismuth iodide (BiI3) in water is 9.491 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)

    asked by julia
  173. MATH HELP!!!!!!

    how would I solve the problem, 10=2/7n+4 ? Please I need help!!!!!!!!!!!!!!!!!!!

    asked by Emi
  174. CHEMISTRY

    Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material. Calculate the absorption edge of this material. Express your answer as a wavenumber in units

    asked by julia
  175. Earth Science

    1. What are one internal and one external source of energy in the Earth system? 2. Earth scientists assume that the causes of natural events of phenomena can be discovered through... 3. Science constantly creates new technology. Does this new technology

    asked by Emma
  176. balaji pharmacy clg ,science

    why do we take 85ml of hcl for 1lit solvent according to I.P. while it is 43.02ml when it is calculated

    asked by shaziya
  177. MATH

    How would i do 11w-9-7w=15 ?

    asked by Emi
  178. physics PLEASE HELP

    In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) must be placed at the empty corner?

    asked by Anonymous
  179. Biology

    What is the case for that sucrose is said to be non-reducing sugar?

    asked by Mengistu
  180. Chemistry

    At temperatures above 930 C, reduces to form metallic lead . The byproduct of the reaction is . Calculate the amount of lead produced (in kg) when a reactor is charged with 953.0 kg of and 1430 kg of .

    asked by User
  181. MATH

    how do i do 8t+5=6t+1 ?

    asked by Emi
  182. chemistry

    The vacancy fraction of a particular metal is found to double as the temperature of the metal is increased from 700 degrees C to 850 degrees C. Calculate the enthalpy of vacancy formation for this metal. Express your answer in units of eV.

    asked by Anonymous
  183. physics

    In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?

    asked by Vlera
  184. Chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 0.468×10−10 m. Determine the frequency (in hz) of the interacting photon.

    asked by Ankur
  185. Math

    Given the following question: -3e^(-2*t)*sin(pi*t pi/3)] How do I find a) period b) frequency c) time (phase) shift d) time constant

    asked by Steve
  186. math

    How do I solve 5/10=x/6 for an eqivalent fraction

    asked by Juliana
  187. math

    solve x2-8x+11=0

    asked by Anonymous
  188. chemestry

    The silicon wafer is coated with a layer of metallic aluminum which acts as an electrical contact. The x-ray diffraction pattern of aluminum is measured in a diffractometer with Fe Kα radiation. At what angle, θ, do you expect to observe the first

    asked by ANoni
  189. algebra

    a car tire has a diameter of 3.5ft. How many revoulutions does each tire make if the car travelled 400ft ?

    asked by lovebugg