Questions Asked on
April 19, 2011

  1. CHEM please!!! help

    Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity of oxygen: -141 kJ/mol

    asked by Joanie
  2. Check my answers? (Chemistry)

    I only get one chance for each of these questions so I was wondering if someone could check my answers, thanks! 1. Consider the following reaction at equilibrium. 2 BrNO(g) ---> 2 NO(g) + Br2(g) Predict the effect of the following changes to the reaction

    asked by Rebekah
  3. physics

    A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12 in 9.0 . Assume the merry-go-round is a uniform disk of radius 2.2 and has a mass of 650 , and two children (each with a mass

    asked by cara
  4. physics

    A grinding wheel 0.28 m in diameter rotates at 2400 rpm. What is the acceleration of a point on the edge of the grinding wheel?

    asked by Cara
  5. calculus

    For trigonometric substitution to solve the above integral, fill in the blanks below using the picture of the triangle given. integral (x^3)/(sqrt(25+9x^2)) dx / l / l / l / l / l / l / l / l / l side A / l / l --------- side B *** sorry hard to draw on

    asked by Chiara
  6. PHYSICS

    Sally Sue, an enthusiastic physics student enjoyed the opportunity to collect data from standing waves in a spring. She and her partner help the ends of their spring 4.00 meters apart. There are 5 nodes in the standing wave produced. Sally moved her hand

    asked by Katie
  7. Math 9

    2 extension ladders are leaning at the same angle against a vertical wall. The 3 meter ladder reaches 2.4 meters up the wall. How much farther up the wall does the 8 meter ladder reach?

    asked by Katie
  8. physics

    A storage tank at stp contains 18.5kg of nitrogen. What is the volume of the tank and what would the pressure be if you added another 15kg of nitrogen at the same temperature?

    asked by Mark
  9. physics

    An electron in an electron beam experiences a downward force of 1.9×10^−14 N while traveling in a magnetic field of 6.4 × 10^−2 T west. The charge on a proton is 1.60×10^−19. a) What is the magnitude of the velocity? b) What is its direction?

    asked by laura
  10. physics

    An electron in an electron beam experiences a downward force of 1.9×10^−14 N while traveling in a magnetic field of 6.4 × 10^−2 T west. The charge on a proton is 1.60×10−19. a) What is the magnitude of the velocity? b) What is its direction?

    asked by Leslie
  11. physics

    A centrifuge accelerates uniformly from rest to 18000 rpm in 180 s. Through how many revolutions did it turn in this time?

    asked by Cara
  12. physics

    In the Sun, an ionized helium atom makes a transition from n =6 state to the n = 2 state, emitting a photon. Can that photon be absorbed by hydrogen atoms present in the Sun? If so between what energy states will the hydrogen atom jump?

    asked by qwer
  13. Chemistry

    Oxygen gas and water are produced by the decomposition of hydrogen peroxide. If 10.0 mol of H2O2 decomposes, what volume of oxygen will be produced? Assume the density of oxygen is 1.429g/L. 2H2O2= 2H2O+O2

    asked by YV
  14. Chemistry

    a sample of helium gas is in a closed system with a movable piston. the volume of the gas sample is changed when both the temperature and the pressure of the sample are increased. the table below shows the initial temperature, pressure, and volume of the

    asked by Shanee
  15. Chemistry

    A 10.0 ml sample of vinegar which is an aqueous solution of acetic acid, requires 16.5ml of a 0.500M NaOH solution to reach the endpoint in a titration (where the moles of acid are equal to the moles of base). What is the molarity of the acetic acid

    asked by Brittany
  16. chemistry

    2LiOH + Co2 = Li2CO3 +H2O If a cannister absorbed 100.0g of CO2 from the air that resulted in the production of 148.5g of Li2CO3, what was the percent yeild for Li2CO3.

    asked by dana
  17. Probability

    At an ice cream ship, customers can order a sundae with 1 type of ice cream, 1 type of sauce, and 1 type topping. The types of ice cream are: chocolate; strawberry; vanilla The types of sauce are: caramel, strawberry, chocolate, butterscotch The types of

    asked by Bobbie
  18. trigonometry

    simplify sin7x-sin3x as a product of trig functions.

    asked by casey
  19. Integrated Physics and Chemistry

    Matching... Heat engine Heat pump Boiler Thermostat -a heating appliance that uses heat energy released from fossil fuels to warm water for use in radiant or convection heating systems -a appliacne that controls the maintenance temperature of a heating

    asked by Ashley
  20. earth

    Deep within the earth, the process of mantle ___ drives plate tectonics. A) Condensation B) Subduction C) Currents D) Convection

    asked by dank
  21. Stoichiometry

    If 0.500 g of sulfur dioxide from pollutants reacts with excess water and oxygen found in the air, what mass of sulfuric acid can be produced? 2H2O(l)+O2(g)+2SO2(g)= 2H2SO4(aq)

    asked by YV
  22. physics

    The bolts on the cylinder head of an engine require tightening to a torque of 63 . If the six-sided bolt head is 15 in diameter, estimate the force applied near each of the six points by a socket wrench.

    asked by cara
  23. chemistry

    Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of CoCl42- increase or decrease when the following changes occur? a) HCl is added. (b) Co(NO3)2 is added. both of those compounds are

    asked by Robbin
  24. Compound math

    (Future Value) Suppose you invest $8000 into an account that pays an annual interest rate of 6.2%. How much is in the account after 30 years if a. simple interest is compound monthly? b. interest is compounded monthly? c. interest is compounded daily?

    asked by Help
  25. chemistry

    Fe2O3+ 3CO=2Fe+3Co2, suppose that 1.64kg of Fe are obtained from a 2.62kg sample of Fe2O3 (ore). assuming that the reaction goes to completion, what is the percent purity of the Fe2O3 in the original sample.

    asked by becky
  26. Chem

    Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) --> Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of CoCl42- increase or decrease when the following changes occur? (a) HCl is added. increases decreases .(b) Co(NO3)2 is added.

    asked by Rebekah
  27. chemistry

    ASSUME THE FORMULA OF GASOLINE AS C8H18 AND ITS DENSITY IS 0.71g/ml. IF A CAR GETS 26.2mi/gal (1GAL=3.785L), WHAT IS THE MASSOF CO2 PRODUCED IN A TRIP OF 225mi.? ASSUME COMPLETE COMBUSTION OF GASOLINE. C8H18+25/2 O2= 8CO2+ 9H2O

    asked by dana
  28. Physics

    A hydrogen atom initially in its ground state (n = 1) absorbs a photon and ends up in the state for which n = 3. What is the energy of the absorbed photon? *I found the energy of the atom at the ground state and at n = 3. I subtracted the final from the

    asked by Joe
  29. physics

    Calculate the ionization energy of doubly ionized Lithium, which has Z=3. Construct also the energy level diagram for it.

    asked by qwer
  30. trig

    convert the point with polar coordinates (2,7pi/6) into rectangular coordinates.

    asked by casey
  31. physics

    The resultant of two forces acting on the same point simultaneously will be the greatest when the angle between them is 180⁰ 45⁰ 0⁰ 90⁰

    asked by usman
  32. chemistry

    Introduced into a 1.50L container is 0.100mol PCl5(g). The flask is held at 227degreesC until equilibrium is established. What are the partial pressures and the total pressures of the gases in the flask at the equilibrium. PCl5(g)PCl3(g)+Cl2(g) I got a

    asked by elona
  33. CHEMISTRY

    CALCULATE THE MASS OF Na3PO3 PRODUCED AFTER 28.0g OF H3PO3 IS TREATED WITH 42.0g OF NaOH, AND ALSO CALCULATE THE MASS REMAINING OF THE EXCESS REAGENT. H3PO3+ 3NaOH = Na3PO3+ 3H2O

    asked by dana
  34. Physics

    A ray of light of frequency is 5.09 x 10^14 Hz is traveling from water to medium X. The angle of incidence in water is 45 degrees and the angle of refraction in Medium X is 29 degrees. The index of refraction of Medium X is 1.94. Calculate the wavelength

    asked by Allyse
  35. Solving Geometry Problem - PLEASE HELP - Test tom!

    A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that

    asked by Gina
  36. math

    how do i use two unit multipliers to convert 61.131121 kilometers to centimeters

    asked by Anonymous
  37. Math

    A plumber charges $45 for a service call, plus $70/h for her time. a. Find the cost of a two hour service call. b. How long was a services call that cost $150? Also ....... as the weight held by a spring increases, the length of the spring increase

    asked by Jessica
  38. English

    Your conclusions are faulty in a cause-and-effect essay if: A. you include secondary effects B. you include only short-term effects C. you distinguish between long-term effects and short-term effects D. you include primary effects I believe it's B?

    asked by melissa
  39. physics

    How high does a rocket have to go above Earth's surface until its weight is one fourth what it would be on Earth?

    asked by johnny
  40. Nuclear FIssion

    How does nuclear fission create energy? Nuclear energy is produced through the splitting, or fission, of a uranium atom in the core of a nuclear reactor. When hit by a neutron, the atom divides and releases two other neutrons, as well as heat and

    asked by Anonymous
  41. Chemistry (PLEASE HELP)

    Which of the following statements are true? Fusion reactions result in nuclei with higher Z. To keep a nuclear power plant going, a chain reaction must be maintained. Nuclear fusion produces no long-lived radioactive by-products. The Sun is a nuclear

    asked by Jamie
  42. HELP!!!!!!!!!

    Introduced into a 1.50L container is 0.100mol PCl5(g). The flask is held at 227degreesC until equilibrium is established. What are the partial pressures and the total pressures of the gases in the flask at the equilibrium. PCl5(g)PCl3(g)+Cl2(g)

    asked by elona
  43. physics

    The third longest wavelength in the Paschen series in hydrogen corresponds to what transitions?

    asked by qwer
  44. Chemistry

    What is the final temperature when 750 J of energy is added to 9.0 g of ice at 0.0 degress C?

    asked by Alex
  45. Chemistry Lewis Structure

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

    asked by Toni Jones
  46. statistics

    a study by Hewitt Associates showed that 79% of companies offer employees flexible scheduling. suppose a researcher believes that in accounting firms this figure is lower. The researcher randomly selected 415 accounting firms and through interviews

    asked by daniel
  47. consumer math

    A tackle box is a rectangular solid with sides of 15 in., 12 in., and 9 in. What is its volume?

    asked by Anonymous
  48. chemistry

    Introduced into a 1.50L container is 0.100mol PCl5(g). The flask is held at 227degreesC until equilibrium is established. What are the partial pressures and the total pressures of the gases in the flask at the equilibrium. PCl5(g)PCl3(g)+Cl2(g)

    asked by elona
  49. Stoichiometry

    If 0.500 g of sulfur dioxide from pollutants reacts with excess water and oxygen found in the air, what mass of sulfuric acid can be produced? 2H2O(l)+O2(g)+2SO2(g)= 2H2SO4(aq)

    asked by YV
  50. Math

    Sean's mom was 27 years old when he was born. When Sean is 14 years old his mother's age will contain the same two digits as Sean's age. The next time that Sean's age and his mother's age contain the same 2 digits ____ years later.

    asked by Tom
  51. chemistry

    A 1.00-L sample of dry air at 25 °C contains 0.0319 mol N2, 0.00856 mol O2, ... The main components of dry air, by volume, are N2, 78.08%; O2, 20.95%; Ar, ... by volume, of the following main gaseous components: N2, 74.1%; O2, ... What is the partial

    asked by Kate
  52. maths

    We can cut a square diagonally in half to get two triangles. Suppose the perimeter of the square is 3cm longer than the perimeter of a resulting triangle. What is the perimeter of the square?

    asked by komal
  53. physics

    A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. The small wheel has a radius of 1.8 and accelerates at the rate of 7.0 , and it is in contact with the pottery wheel (radius 30.0 )

    asked by cara
  54. Chemistry

    Which of the following statements are true? Fusion reactions result in nuclei with higher Z. To keep a nuclear power plant going, a chain reaction must be maintained. Nuclear fusion produces no long-lived radioactive by-products. The Sun is a nuclear

    asked by Sue
  55. chemistry

    A reaction is run in which dissolved silver ions are reduced in the presence of solid copper. THis reaction can be used to produce a silver coating on a copper wire frame. .249g of copper wire was placed in a 100 mL of a 0.500 M solution of silver nitrate.

    asked by mmmmm
  56. Calculus

    Consider the curve y^2+xy+x^2=15. What is dy/dx? Find the two points on the curve where y equals 0 and show that the tangent lines there are parallel. Find the coordinates of all points on the curve where there is a horizontal tangent line, with work.

    asked by K.Jeanes
  57. chemistry

    how many grams of hydrogen peroxide (H2O2) must be added to 1500 ml of water to produce a concentration of 1.33 m (molal solution)

    asked by Anonymous
  58. Chemistry

    What is the theoretical yield of aspirin if you have 2g of salicylic acid and 5 ml acetic anhydride?

    asked by N/A
  59. math

    what shape has 4 equal sides and 4 right angles?

    asked by Andrew-please help!!!!!very important
  60. algebra 1

    From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.

    asked by Maram
  61. Chemistry

    Estimate the enthalpy change for the following reaction OH(g)+CH4(g)==>CH3(g)+H2O(g)

    asked by West
  62. CHEMISTRY

    4BF3+3H2O=H3BO3+3HBF4 if the reaction vessel contains 0.496 mol BF3 and 5.63g of H2O, which compound is the limiting reactant? how many molesof HBF4 can be produced?

    asked by dana
  63. Physics

    A cylinder of oxygen has a gauge pressure of 2000psi and a volume of 16L at 70 degrees F. If the oxygen is used as a constant flow rate of 2 L/minute, measured at 1 atm of pressure, how long will the tank last? Hint: Calculate the mass (grams) of oxygen in

    asked by Lindsey
  64. Analytical Chemistry

    I need to prepare a standard iron solution by dissolving an appropriate mass of solid Fe(NH4)2(SO4)2*6H2O in water in a 1L volumetric flask containing 1 ml of 96 wt% H2SO4. The final concentration should be ~40mg/L. How would I calculate the this?

    asked by Ryan
  65. chemistry

    which is the correct formula for the combustion of S8 at STP, (a) or (b)? a) S8(s) + 4O2(g) ==> 4SO2(g) b) S8(s) + 8O2(g) ==> 8SO2(g) someone told me it is (a), but that is not balanced... or is it right? please and thank you!!!!

    asked by mufasa04
  66. physics

    The weight of an object on the moon is one-sixth of its weight on the Earth. The ratio of the kinetic energy of a body on the Earth moving with speed V to that of the same body moving with speed V on the moon is:

    asked by Jazo
  67. Biology

    What 'EXPERIMENT' did Craig Venter & Francis Collins do in the Human Genome Project? Any links would be great! I've found a lot of info. on what it is, but I'm looking for info on what they did to get there.

    asked by Cecilia
  68. CHEMISTRY

    When SbCl3(g) (4.867 mol) and 0.01217 mol/L of Cl2(g) in a 400.0 L reaction vessel at 958.0 K are allowed to come to equilibrium the mixture contains 0.008586 mol/L of SbCl5(g). What concentration (mol/L) of SbCl3(g) reacted? SbCl3(g)+Cl2(g) = SbCl5(g)

    asked by ANNA-MARIE
  69. Integrated Physics and Chemistry

    The internal energy of a material is determined by.. A)its temperature B)the kinetic energy of its molecules C)the potential energy of its molecules D)the combined amount of kinetic and potential energy of its molecules

    asked by Ashley
  70. statistics

    Use the data given to test the following hupotheses. Assume the data are normally distributed in the population. Ho: M=7.48 Ha:m>7.48 xbar = 6.91, n=24, sigma=1.21,alpha=.01

    asked by daniel
  71. physics - please hellp

    I need help with two questions: 1) An object can only have a charge that is an integral multiple of the charge on the ___. Am I correct with "electron" as the answer? or possibly elementary charge? 2) The difference in potential between any two points in a

    asked by Sushmitha
  72. accounting

    MKTG205-1101B-07 Principles of Marketing Assignment Name: Unit 5 Individual Project Deliverable Length: 2-3 pages Details: Select a global company of your choice in the service industry. Using your selected global company as the subject matter, research

    asked by Nancy Jackson
  73. chem

    Introduced into a 1.50L container is 0.100mol PCl5(g). The flask is held at 227degreesC until equilibrium is established. What are the partial pressures and the total pressures of the gases in the flask at the equilibrium. PCl5(g)PCl3(g)+Cl2(g) Can you

    asked by elona
  74. physics

    A thin 2.82 m long copper rod in a uniform magnetic field has a mass of 44.2 g. When the rod carries a current of 0.238 A, it floats in the magnetic field. The acceleration of gravity is 9.81 m/s2 . What is the field strength of the magnetic field? Answer

    asked by maria
  75. physics

    An airplane flies 200 km due west from city A to city B and then 245 km in the direction of 31.5° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A?

    asked by diamond
  76. A level english literature

    I need to write an essay comparing estrangement and alienation in cat on a hot tin roof and awakening, I sort of know what to write but I'm struggling to get a good opening to my essay. Help!

    asked by Dan
  77. science

    please help.....i don't have my txt book with me an i need 2 kno everything bout Non-Vascular and Vascular plants....please rovide a website...........i cant find any

    asked by Angel
  78. Math

    The variable d represents the cost of a customer's meal, in dollar. The following expression represents the amount paid, including tax. d + 0.18d F. The cost plus eighteen percent of the cost G. the cost minus eighteen percent of the cost H. the cost plus

    asked by chaya
  79. College Math

    Trade Discount at 12% add 3% what is the net cost equivalent rate of the series discount?

    asked by Delores
  80. physics

    Explain what ideas led Bohr to suggest a new atomic model; and state Bohr postulates. Explain also, in words, what the correspondence principle is in atomic physics.

    asked by qwer
  81. PRECALCULUS

    write the complex number in standard form a+bi sqrt 7 (cos pi/12 + i sin pi/12) (sqrt = square root, i= imaginary number)

    asked by YOSHI
  82. Accounting

    (Present Value) What is the present value of an annuity that pays $250,000 in 30 years if interest accumulates at a rate of 7.5% compounded semiannually? (i.e. How do you have to pay NOW for the policy? You make no payments other than your lump sum

    asked by Page
  83. trig

    sin^-1(sin5pi/6)

    asked by casey
  84. science

    when a car suddenly stops at a red light a book lying on the car seat slides forward why does the book continue to move forward?

    asked by Anonymous
  85. chemistry

    given C12H22O11+H2O----C6H12O6+C6H12O6 heat combustion 0f 2815.8 kj/mol what is the standard enthalpy

    asked by yr
  86. algebra 1

    because i have to sketch, label and mark each figure. sketch, label and mark each figure. 1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute

    asked by Maram
  87. physics

    find the speed and period of a satellite that would orbit Mars 203 km above its surface.

    asked by johnny
  88. MATh

    Which expression means y is three times the size of x? A. Y= x + 3 B. Y = x over 3 c. Y = x - 3 D. y = 3x A manufacturing company's sales decreased by 0.1%. Which of the following is equivalent to 0.1%? F. One percent G. One - tenth percent H. one-

    asked by Eric Chanto
  89. chemistry

    how much cobalt-60 remains 15 years after it is initially made?cobalt-60 has half life 5.27

    asked by adib
  90. algebra

    Minimum Wage: The table shows minmum wage for three different years Year 1940 1968 1997 Wage ($) 0.25 1.60 5.15 (a) Make a scatterplot of the data in the viewing rectangle [1930, 2010, 10] by [0, 6, 1] (b) Find a quadratic function given by f(x) = a(x –

    asked by jake
  91. Physics

    A motorcycle with a mass of 350 kg is accelerated from rest to a velocity of 30 m/s by a force of 4000 N. calculate the distance over which this acceleration occurred.

    asked by helpp
  92. PHYSICS

    A thin 2.82 m long copper rod in a uniform magnetic field has a mass of 44.2 g. When the rod carries a current of 0.238 A, it floats in the magnetic field. The acceleration of gravity is 9.81 m/s2 . What is the field strength of the magnetic field? Answer

    asked by Leslie
  93. reading

    what this the answer for this question We can conclude from paragraph a)theories are often revised. b)theories are never modified. c)theories are always changed. d)theories are mostly illogical. The concept that the Earth is a sphere can be traced back

    asked by nina
  94. CHEMISTRY

    When NO(g) (0.06623 mol/L) and 422.6 grams of Cl2(g) in a 180.0 L reaction vessel at 565.0 °C are allowed to come to equilibrium the mixture contains 3.096 mol of NOCl(g). What is the concentration (mol/L) of NOCl(g)? 2NO(g)+Cl2(g) = 2NOCl(g)

    asked by ANNA-MARIE
  95. Math: Statistics

    My homework has a list of numbers and I'm working with standard deviation. I know the standard deviation as well as the mean and everything, but it says to find "the weight that is 3 standard deviations below the mean." What is the formula for that, and

    asked by Justin
  96. Japan's Nuclear Crisis

    How does nuclear fission create energy? Nuclear energy is produced through the splitting, or fission, of a uranium atom in the core of a nuclear reactor. When hit by a neutron, the atom divides and releases two other neutrons, as well as heat and

    asked by Anonymous
  97. algerbra

    the area of trianlge ABC is 20 square units. if abgle A=130 and b=6 find the value of c?

    asked by shannon
  98. algebra1

    The area of trapezoid is h( b1+b2)/5, where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 sguare inches , and one base 12 inches long, what is the lenghth, in inches, of its

    asked by Maram
  99. algebra 1

    A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help

    asked by Maram
  100. algerbra 2

    if a jet printer prints an articlae in 12 minutes and a laser printer prints the same in 29 minutes if they work together how many minutes

    asked by Anonymous
  101. calculus

    I posted this below, and no one answered. Please help with this very complicated question! Using 3(x-3)(x^2-6x+23)^1/2, as the chain rule differentiation of f(x)=(x^2-6x+23). Please explain how I find the general solution to the differential equation

    asked by Amy
  102. chemistry (need some help)

    In a series of decays (hypothetical), the nuclide Ra-227 beomes Pb-203. How many alphas and how many betas are emitted in this series? Give two answers: first, give the number of alpha decays; then, the number of beta decays. I know that there are 6 alpha

    asked by Lauren
  103. Math

    We pour water into a conical container of a radius of 10 cm with a height of 36cm at a rate of 70 cm^3/s. At what velocity does the water level increase when it reaches 12 cm? dh/dt=?

    asked by Bobski
  104. Math

    Sam has 9 models. Bill has twice as many models as Jim. Jim has three less models than Sam. Show how to find the difference between the number of models Bill has and the number of models Sam has.

    asked by Jaer
  105. math

    In triangle ABC ,if

    asked by Maram
  106. Laissez-faire

    Please simplify this for me. Cant understand this at all. Laissez-faire is synonymous with what was referred to as strict capitalist free market economy during the early and mid-19th century as an ideal to achieve. It is generally understood that the

    asked by Anonymous
  107. math

    If a circle has a diameter of 2 3/8 inches, then what is the length of the radius

    asked by nysanah
  108. physics

    A proton moves perpendicularly to a mag- netic field that has a magnitude of 3.09×10^−2 T. The charge on a proton is 1.60×10−19 C. What is the speed of the particle if the magnitude of the magnetic force on it is 3.50*10^−14N? Answer in units of

    asked by maria
  109. College Physics

    I'm asked to find the shortest wavelength photon emitted for the paschen series for the hydrogen atom. I used the Rydberg equation and substituted the appropriate values. Frequency= Rh(1/3^2)-(1/infinity^2) I get an answer of 820 nm. My online homework

    asked by Dave
  110. geometry

    what is the volume of a solid whose base is shown on the left and whose sides are 2 yards tall. dimensions are in feet

    asked by K.T.
  111. Organic Chemistry

    What advantages does H NMR have over melting point in the determination of purity?

    asked by anon
  112. Science

    calculate the mass of sodium nitrate in grams in a 150 ml solution of a 5.00 M solution of sodium nitrate

    asked by Stephanie
  113. physics

    A box is placed on top of another box,if it is exerting a compressive force of 500N.What is the approximate weight of the box?

    asked by Agnes
  114. physics

    A proton moves perpendicularly to a mag- netic field that has a magnitude of 3.09×10^−2 T. The charge on a proton is 1.60×10−19 C. What is the speed of the particle if the magnitude of the magnetic force on it is 3.50*10^−14N? Answer in units of

    asked by maria
  115. Math

    In a rack of 15 billiard balls and one ball is selected at random what are the odds in favor it being a ball other than the 8 ball. I thought it would be 1/15 but I am not sure. Anyone help me on this?

    asked by Gerri
  116. accounting

    accounting and Organizational Cultures: A Field Study of the Emergence of a New Organizational Reality"

    asked by liza
  117. math probability

    3 people are selected at random without replacement out of 12 girls and 3 boys. What is the probability of selecting all girls?

    asked by Anonymous
  118. math

    The number of distinguishable permutations that can be formed from the letters of the word PRINT is 120.ITS THAT TRUE or FALSE

    asked by Teii
  119. math

    A student of MA101 is preparing a course schedule for the next semester. The student may select one of three mathematics courses, one of three science courses, and one of five courses from social sciences. How many schedules are possible?

    asked by Amatusi
  120. Algebra 2

    I need to know if I did this problem correctly: 5. Solve for x in |x - 3| >8 Work: |x - 3| >8 |x| > 8 +3 Anwer= x > 11 I also need help with these 2: 15. Comepare the quantity in Column A with the quantity in Column B. Column A- slope of y = 2x +2 Column

    asked by mysterychicken
  121. chemistry

    How many liters of hydrogen will be produced by the decomposition of 59 grams of dihydrogen dioxide at STP?

    asked by lawegfvsefwWA
  122. Math- Calculus

    Let f be a function such that f(-1)=3 and f'(-1)=6 let h(x)=x^5f(x) evaluate h'(x) at x=-1

    asked by Marissa
  123. Math

    For the function y=(x^4)-(2x^2)+1 Identify all relative extrema. Identify any points of inflection. Identify the absolute extrema on the interval[-2,3].

    asked by Anonymous
  124. Chemistry

    Calculate the mole fraction of the solute. 3.10% ethanol, by volume (d=0.993 g/mL; pure C2H5OH, d=0.789 g/mL)

    asked by miau
  125. Geometry

    A 10 ft. ladder is leaning against a building and makes an angle of 65 degrees with the ground. How high above the ground is the top of the ladder?

    asked by Randi
  126. Math

    A=P(1+r)^2 A= interest P= principle interest r= interest rate t= time in years If $4500 invested at 7% interest compounded annually yeilds $15600, for how many years was the money invested?

    asked by Mike
  127. JAPAN

    For what reasons are you in favour of using nuclear energy to generate electricity? What reasons would you be against nuclear power? For the against part--that would be that it's a big step of risk towards human health. For the favourable part--I guess

    asked by Anonymous
  128. Chemistry

    At standard temperature a gas has a volume of 275ml if the temperature is increased to 130C buit the pressure is held constant what is the new volume?

    asked by Karla
  129. Math-Geometry

    In a jar there are 18 marbles. There are 3 red marbles, 9 green marbles, 6 blue marbles. What is the probability of drawing (with replacement) a red marble and then a green marble? Please write the answer in fraction form? Show how you did all the work.

    asked by Itreek
  130. math

    a vector has a magnitude of 18.3 cm and a direction of 38 degrees. find the magnitude of its vertical and horizontal components to the nearest tenth.

    asked by Brad
  131. algebra 1

    sketch, label and mark each figure. 1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute

    asked by Maram
  132. physics

    A dish of hot food has an emissivity of 0.42 and emits 15 W of thermal radiation. If you wrap it in aluminum foil, which has an emissivity of 0.06, how much power will it radiate?

    asked by Olga
  133. chemistry

    220 ml of an HCl solution that is 31.4% by mass is required to neutralize .50 gal of the chlorine solution. what is the molarity of the OH- of the clorine solution? chlorine solution is NaOCl in NaOH

    asked by Bob
  134. trig

    angle x lies in quadrant 3 and cos(x)=-.6. Find cos(3pi/2-x)

    asked by Dan
  135. physics

    Two 173 turn coils, each with a diameter of d = 4.45 m, are placed w = 1.31 m apart, as shown in the figure. A current of 6.99 A is flowing in the wires of both coils; the direction of the current is clockwise for both coils when viewed from the left. What

    asked by ok
  136. math

    A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that

    asked by Gina
  137. english

    1. An analogy helps clarify a complex idea by: A. presenting several definitions of the idea. B. comparing the idea with a simpler one C. breaking down the idea into smaller pieces D. pointing our a single common trait between two topics. I think it's B?

    asked by melissa
  138. math

    At Andrews sweet shop almond fudge costs $5.23 per pound, and vanilla fudge costs $4.17 per pound. Allison buys 0.75 pound of almond fudge and 1.25 pounds of vanilla fudge. About how much will Allison pay altogether (excluding tax)?

    asked by Anne
  139. math

    From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.

    asked by Maram
  140. math

    A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help

    asked by Maram
  141. Economics

    Suppose you deposit $5,000 in a bank which pays 10 percent interest compounded twice a year. The actual annual interest rate you receive is: a- 10 b-11 c-10.25 d-12

    asked by mike
  142. chemistry

    The legal limit for drunkenness is 0.08 ( 0.08 grams of alcohol per 100ml of blood). expired air contains the following main gaseous components by volume: 74.1% N2; 15.0% O2; 6.0% H2O; 0.9% Ar; and 4.0% CO2 at 37 degrees Celcius and 1 atm. Determine the

    asked by Sammy
  143. space

    How much is 2000 kg in outer space?

    asked by Ray
  144. Social Studies

    Was Blitzkrieg a successfull war stratagy?

    asked by maggie
  145. Chemistry

    In a series of decays (hypothetical), the nuclide Ra-227 beomes Pb-203. How many alphas and how many betas are emitted in this series? Give two answers: first, give the number of alpha decays; then, the number of beta decays. I know that there are 6 alpha

    asked by Michael
  146. Math

    Four candidates are running for president of the student council. three other candidates are running for vice-president. how many different ways can the two offices be filled?

    asked by Mai
  147. MATH please help

    A sweater that was

    asked by Brandon
  148. Statistics

    Outliers are often easy to spot in histograms...my question is can a historgram have more than one outlier.

    asked by Melissa
  149. Intro to Statistics

    A sample has n = 9 scores and an SS = 216. What is the variance for this sample?

    asked by Cristina
  150. Quick Qustion

    In math, when you have an amount in money and you are asked to round to the nearest dollar, how would you do that? Example: $2,100.00 is rounded to $2,000? Is $48.50 rounded to $50.00?

    asked by Willy Wonka
  151. Math

    The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law

    asked by Ralph
  152. Spanish7th grade-Please check

    Could you please check these two answers: 1.Fill in the blank with what would logically follow: primero,_______ I think it is segundo, correct? 2.Fill in blank with what would logically follow: tercero_________ I think it is cuarto, correct? 3. In a

    asked by Aubrey
  153. Math

    A box contains 2 blue marbles and 7 red marbles and two marbles are drawn with out replacement. The probability of not getting a red marble is

    asked by Kandace
  154. com-155

    Students are often confused about the use of the words good and well in their writing. Write a 100-word passage to Susan Anker, the author of the course’s textbook, in which you describe five details from her book that are good and five details about the

    asked by b-more-nappy
  155. hca

    You are an allied health professional talking with a supervisor about a particular patient. Begin describing the patient’s concerns and affected areas using medical language

    asked by Anonymous
  156. math

    How many license plates consisting of 2 letters (upper case) followed by two digits are possible?

    asked by Alaini
  157. Everything

    WHY IS THERE SO MUCH HOMEWORK? Id rather have another hour of school than an hout of homework!

    asked by 6th grd Sarah
  158. Math/Solving side lengths of similar figures!!!

    I have to find out what (x) equals. it shows me two triangles. ABC and XYZ. XYZ's sides are X-6 Y-10 and Z-8. ABC's sides are A-(x) B-25 and nothing for C. i need to find the value of (x). I'm expelled from school, and I get taught at the library everyday

    asked by Kourt
  159. math

    if a basketball player shoots 50 free throws and makes 23% of them,how many free throws did he make?

    asked by keith
  160. Math

    a woman's clothing chain store, found that t days after the end of a sales promotion the volume of sales was given by S(t)= 20,000 (1+e^-.6t), 0 less than or equal to t less than or equal to 5 dollars. find to the nearest dollars the rate of change of

    asked by Anonymous
  161. Economics

    Slim city is a town resided by slim people, with no health club in town. LA Fatness has estimated that the annual demand for their Fatness Club in this town to be Q = 160 - P. Every Club member has a marginal cost of $40, and the annual fixed cost of the

    asked by <3
  162. Integrated Physics and Chemistry

    A thermostat is used for which of the following? A) Maintaining the temperature is a room B)Turning a heating system on C)Turning a heating system off D)All of the above

    asked by Ashley
  163. Math

    A bag holds 40 erasers that are each the same size and shape.Eight of the erasers are red. You reach into the bag and select one eraser at random, what is the probability it is not red?

    asked by Savanna
  164. Ratios

    You have 45 coins. Five out of every 9 are heads and the rest are tails. How many coins are heads?

    asked by Ryan
  165. religion

    okay so i'm doing a scrapbook for my saint project and i was wondering if there is a software i can download which is like a digital scrapbook.

    asked by kathy
  166. substition algebra

    solve x & y: 3X-6Y(-6X+34)=30

    asked by tom
  167. Algebra

    d: 2 2 3 4 10 5 3 x y x x z z − −     +  

    asked by Luis
  168. ETH 125

    Journal Entry of a subordinate group

    asked by Anonymous
  169. Math (please help!)

    You have 16 coins that are heads up and 18 coins that are tails up. After you add some coins that are tails up, the ratio of heads up to tails up is 1 to 1.5. How many coins are tails up? How many coins in all?

    asked by Natalia
  170. Socials

    Why did the reactors at the Fukushima plant overheat?

    asked by Anonymous
  171. trig

    The parametric equations for a curve in the x-y plane are x=2+t^2 and y=4-3t. Determine the points where the curve intersects the x-axis.

    asked by casey
  172. statistics

    I need a good research question for my statistics project. I have to compare two to calculate the difference. variance/standard deviation etc.

    asked by Kimberly
  173. MATH

    quantity price 50 $1.25 100 $2.25 200 $4.20 300 $11.25 Which quantity has the best unit price? PLease explain so i could understand thanks for the help AND THE dimensions of rectangular parking lot are 330ft by 480ft What is the area of the parking lot in

    asked by KAyleen
  174. Maths

    a) A young man measuring 1.89 m. walks at a velocity of 1m/s towards a lamppost which its light is at 4m from the ground. At what velocity does the young man's shadow decrease when he's 10 m away from the lamppost? b) A young girl, standing at the edge of

    asked by Tim2
  175. algebra 1

    The area of trapezoid is h( b1+b2)/5, where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the lenghth, in inches, of its

    asked by Maram
  176. chemistry (NEED HELP)

    In a series of decays (hypothetical), the nuclide Ra-227 beomes Pb-203. How many alphas and how many betas are emitted in this series? Give two answers: first, give the number of alpha decays; then, the number of beta decays. I know that there are 6 alpha

    asked by Jessie
  177. math

    If a and b are any real numbers such that 0

    asked by Maram
  178. chemistry

    given C12H22O11+H2O----C6H12O6+C6H12O6 heat combustion0f 2826.7kj/mol what is the standard enthalpy

    asked by yr
  179. algebra 1

    If a and b are any real numbers such that 0

    asked by Maram
  180. maths

    how long will it take a sum of money to tripe itself at (i) 9.5% compound interest and (ii) 9.5% simple interest?

    asked by judith
  181. literature

    in at least 4 sentences, compare and contrast the literary elements in the autobiographies of frederick douglass (my bondage and my freedom) and benjamin franlin

    asked by jack
  182. u.s. history

    To what extent and in what ways did the great depression and the new deal alter americans perception of the legitimate role of government in the economic and social life of the united states?

    asked by PLEASE HELP ASAP
  183. History

    which country was part of New Granada in the 19th century?

    asked by Alyonka
  184. new art history

    compare and contrast san vitale and sant' apollinaire

    asked by Anonymous
  185. calculus

    You wish to get to the other side of a river that is three miles wide you are 5 miles

    asked by GLEN
  186. Physics

    How do I solve this question: What is the resistance of a laptop computer that has an 11V battery & requires 15W of power?

    asked by Franchesca
  187. MAth

    Country Currency Rate U.S $ 1.0 Austria Schilling 11.465 Finland Markka 4.954 United KIngdom Pound 0.572 She bought plane ticket for 150 pounds in the united kingdom. How much would it cost in Austria?

    asked by corry
  188. physics

    How much power is used by a 50Kg athlete in climbing a 10m high ladder in 9.8 sec? 1000 J 2000 J 3000 J 4000 J

    asked by usman
  189. physics

    If Fx = Fy then the angle è which the vector F makes with the horizontal is of 0⁰ 45⁰ 90⁰ 180⁰

    asked by usman
  190. math

    factor: 2x^3 - x^2 - 162x + 81 Thank you

    asked by jane
  191. European History

    I was wondering if someone could check my thesis statement for my DBQ on the causes of WWI. (political, social, and economical). WWI, which involved all of the great powers of Europe, was sparked by the multitude of military alliances and treaties, the

    asked by Wendy
  192. math

    There are 20 people in a club. In how many ways can the club elect a president, a secretary and a treasurer, on person can hold more than one office?.

    asked by RESTURE
  193. math

    what is the set of A if we let A={0,3,5,7}

    asked by Corrina
  194. physics

    Evaluate the Rydberg constant R using Bohr theory and show that its value is R = 1.0974x10-1.

    asked by qwer
  195. Math

    Today Justin reached 1/11 the age of his mother was when he was bron. Today, Justin's mother is _____ times as old as Justin.

    asked by Tom
  196. intermediate algebra

    the length of a rectangular swimming pool is four times the width. If the primeter is 160 feet, then what are the length and width

    asked by joy
  197. Intro to Psychology

    For each of the following descriptions, identify a possibLe underlying personality trait. 1) Jenny is described by her coworks as overly sensitive, critical, and impatient. Her family describes her as warm and supportive. 2) Matthew is describes by his

    asked by Veronica
  198. PRECALCULUS

    write the complex number in standard form a+bi sqrt 7 (cos pi/12 + i sin pi/12) (sqrt = square root, i= imaginary number)

    asked by YOSHI
  199. Algebra Please Help

    I have read and read this promble and I just am not understanding it, could some one please help. I have been out of school for a long time. The length of the Statue of Liberty's index finger is 8 feet while the height to the top of the head is about 111

    asked by Shawn L
  200. Accounting

    If your credit card company charges you 1% per month on your balance, what effective annual rate of interest is it charging?

    asked by Deron
  201. Calculus

    Find the equation of the line tangent to the graph of y=4 e^x at x=2. I always get confused with tangent lines I worked this out to be 4e^x(x-2)+4e^2 but the program i have to submit it to says its wrong.

    asked by Alex
  202. English

    I just have two sentences for you to check. Thank you very much. 1) She is going to do a school internship (?) during her summer holiday. In particular, she is going to work as a recepionist in a confectionary factory. She won't be paid for it. 2) You can

    asked by Mike1
  203. Laissez Faire

    I found the passage I posted about Laissez Faire on Wikipedia.

    asked by Anonymous
  204. Discrete Math

    isisDOTpolyDOTedu/courses/discretemath/problemsDOTpdf Link is above can you please take a look? Specifically #21 on pg. 345. [There are 900 3DN], I need help with g-h. Thank you.

    asked by Francesca
  205. Hamlet

    This question is in regards to Hamlets to be or not be speech. Historians have noted that some of the most effective leaders in recent history, including some recent Presidents, have not been considered to be especially intelligent. They have made quick

    asked by Emma
  206. algebra

    Please help with solving this 5r(6rs-12st)t

    asked by Lance
  207. Com/155

    Read the summary paragraph on the bottom of p. 37. Identify the author’s goal in writing the paragraph. How effectively do you think the author met that goal? The paragraph is below. Hockenbury and Hockenbury tell us that daily hassles often cause more

    asked by Monica
  208. College Algebra

    If 24% of your monthly pay is withheld for federal income taxes and another 6% is withheld for Social Security, state income tax, and other miscellaneous items, leaving you with $989.50 a month in take-home pay, then the amount you earned before the

    asked by Nancy
  209. Math

    You have 16 coins that are heads up and 18 coins that are tails up. After you add some coins that are tails up, the ratio of heads up to tails up is 1 to 1.5. How many coins are tails up? How many coins in all?

    asked by Natalia
  210. Algebra 1

    In triangle ABC ,if

    asked by Maram
  211. algebra 1

    what are values of a and b, if any , where a|b-2|

    asked by Maram
  212. algerba 1

    If a and b are any real numbers such that 0

    asked by Maram
  213. algebra 1

    In right triangle ABC below, what is the sine of

    asked by Maram
  214. physics

    a 2 kg object is released from rest from a height of 10 m above the ground.calculate the kinetic energy at the moment it reaches 4 m above the ground with potential energy 200J

    asked by zafirah
  215. us history

    what did sojourner truth saw as a solution to the problem.y do teachers give us complicaited stuff omg yes i used stuff

    asked by megan ayers
  216. Human & Social Biology

    describe how social biologists may help to solve the problems of housing lacking sanitation

    asked by Shonnie
  217. LifeOrintation

    Identify one enviromenral or human factor tha causes ill health,accidents

    asked by makhado asiashu
  218. Nuclear Crisis Help

    the workers who have been trying to bring the nuclear crisis under control volunteered 4 the job. what factors might they have weighed when deciding whether or not to stay behind and help. What qualities do you think these people must possess? Why do you

    asked by Anonymous
  219. ETH 125

    Journal Entry of Subordinate of African Americans

    asked by Anonymous
  220. us history

    list two reasons that stereotypes creted by propaganda may gave affected the deciosion to drop the atomic bomb on japan

    asked by AJ
  221. Socials

    For what reasons are you in favour of using nuclear energy to generate electricity? What reasons would you be against nuclear power? For the against part--that would be that it's a big step of risk towards human health. Not safe, and safety should always

    asked by Anonymous
  222. Le Chatelier's Principle

    If the equation is : Cd2+(aq) + Cl-(aq) ¡ê CdCl+ What would happen when Na+ is added would it shift to the right or will there be no change/effect to the system?

    asked by Nicole
  223. HCA/230

    Hello, I am confused on my assignment I have to do. It states to make a list on perspectives of caregivers. Can you explain this better for me? Is this what they do? Anything info will help me on this one. Thanks,

    asked by Nikol
  224. trig

    simplify the expression: sin(theta+pi/4) + sin(theta-pi/4)

    asked by casey
  225. Algebra

    Perform the indicated operations of 5/8-(2-7)

    asked by Audrey
  226. accounting

    If you decide to buy a car for $17,500 and get $2,500 on a trade-in. If the bank finances the remainder at 7.8%, and you want to pay off the loan in 5 years, how much will your monthly payments be? (Assume that interest is compounded monthly.)

    asked by happy
  227. saxon math

    5-(2 3/5-1)

    asked by Anonymous
  228. Math

    The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law

    asked by Ralph
  229. Science

    How does the temperature of water affect the speed of the water molecules?

    asked by Michael
  230. chemistry

    given C12H22O11+H2O----C6H12O6+C6H12O6 heat combustion0f 5646.7kj/mol what is the standard enthalpy

    asked by yr
  231. English

    Which of the following should NOT be capitalized? A. Europe B. the Earth C. Far East D. the South Atlantic I think it's B?

    asked by melissa
  232. ms sue

    ms sue i did and went back to the other posts. could you please help me now. And also i need a bit help on this bit. the workers who have been trying to bring the nuclear crisis under control volunteered 4 the job. what factors might they have weighed when

    asked by Anonymous
  233. English

    What is the the meaning of APA

    asked by JoshelaT
  234. English

    Hello. Will you please tell me if the following word order is possible in English: "She sometimes (?) doesn't go to work" or is it "Sometimes she doesn't go to work"? Thank you for help.

    asked by Ilma
  235. English

    What is the relationship between critical thinking and academic integrity?

    asked by JoshelaT
  236. American lIt project

    Do you guys know of any songs or poems that have to do with America in the 1950s? Thanks

    asked by Sarah
  237. Math

    Liz, jas and Sam each have a collection of marbles. The three of them pool their marbles to make a larger collection. They weigh the marbles on a postal scale. Together they have 2$6 marbles which.weigh 183 ounces. What is the average weight(unit rate) of

    asked by Mark
  238. english

    Which of these sentences is correct or illustrates the best style? (Points : 1) Greg got a new job. He had an interview on Monday. The company hired him that day. Greg got a new job. He had an interview on Monday, and the company hired him that same day.

    asked by Joise A
  239. Math

    You have 16 coins that are heads up and 18 coins that are tails up. After you add some coins that are tails up, the ratio of heads up to tails up is 1 to 1.5. How many coins are tails up? How many coins in all?

    asked by James
  240. chemistry

    How many moles of oxygen are needed to produce 7.43 moles of sulfur trioxide?

    asked by Anonymous
  241. human resources

    Describe human development and the factors that have stimulated research in this aera.

    asked by Candance
  242. Economics

    In long-run equilibrium there will be no economic profit in a purely competitive static economy because: 1- barriers to entry will prevent profit from arising. 2-there will be no uncertainty, no innovations, and no monopoly. 3- there will be no need for

    asked by mike
  243. small business australia

    how do networks help small business by overcoming the major obstacle of being small? explain with examples.

    asked by lastdon
  244. small business australia

    does australi have an enterprise culture ? if not , why not ? discuss

    asked by lastdon
  245. allied health

    briefly summarize how diagnostic test reports can be used in the following: diagnosis patient management screening

    asked by Cass
  246. Chemistry

    Construct the data chart and the pH curve for the titration of 25 mL of 0.1 M CH3COOH with 0.1M NaOH. Add the titrant 1 mL at a time and calculate the pH after each addition

    asked by Jake
  247. english

    using appropriate punctuation, including plurals and possessives in writing.

    asked by shanell
  248. Geography check

    My question is what country's capital is in the terra fria zone and there are 3 answers, I don't know which one is correct. They are Mexico, Colombia, and Ecuador. Can you please help me choose the right one?

    asked by Alyonka
  249. scirence

    hpw do water and dissolved materials move through non-vascular plants?

    asked by Angel
  250. Geometry

    how to you solve: the radius of circle Z is 13.5 units long. Find the length of each arc for the given angle measure. if the angle measure is 120 degrees?

    asked by Rachel
  251. economics

    use the expenditure equation for gdp=c+i+g+xn find the values for each sector for the years 1929 and 1933. determine the precentage change for the two years.

    asked by patricia
  252. physics

    A man moves along a semi-circle. What is the relation between distance covered (S) by him and his displacement (D)? S = D S > D S < D

    asked by usman
  253. math

    5 blue and 3 green what are probabilty of getting blue

    asked by debbie
  254. science

    Where can I get any good scientific journals which might have info on dingoes

    asked by Tatiana
  255. Math

    Country Currency Rate U.S Dollar 1.0 Austria Schilling 11.465 Finland Markka 4.954 United Kingdom Pound 0.572 Suja bought a plane ticket for 150 pounds in the united kingdom. How much would the same plane ticket cost in Austria? question 2 Jaisen earned

    asked by Brandon cordez
  256. math

    How may committees of size 4 is to be selected from a group of 7 local students and 6 overseas students.

    asked by Alaini
  257. english 2

    i need to write an essay on TO KILL MOCKINGBIRD, and the topic is; "Discuss three themes of the novel. in addition to the more obvious themes of prejudice and injustice that the author develops, other possible themes include: growing up, superstition,

    asked by km
  258. Algebra

    Is y=3x+67 a linear equation?

    asked by Lori
  259. statistics

    At a church bazzar they have a game of chance that consists of picking a two digit number(0-9).You can bet 1$ by picking a two digit number if you match two numbers you win 25$ if you match one the numbers in the same order you win 3$ if you bet 24 and 42

    asked by maya
  260. math

    is 17 14 and 6 measurements of a right triangle?

    asked by emily
  261. Math

    Four candidates are running for president of the student council. three other candidates are running for vice-president. how many different ways can the two offices be filled?

    asked by LOL
  262. SCIENCE

    THE FASTER YOU WORK THE MORE YOU GET OF MA . WHAT AM I

    asked by LOLA
  263. math

    the expiremental probability that ryan will have math homework on a given school day is 80%.on how many of the next30 school days can ryan expect to have math homework?

    asked by hannah
  264. chemistry

    If you add heat energy to water molecules i the form of ice,where does the energy go?

    asked by Anonymous
  265. math

    find the value of pi in the following: sin pi=cos(pi + 40) sin(80 - pi)=cos pi

    asked by sonia
  266. Math

    solve for x: 8^x=(1/64)^(x-4)

    asked by Anonymous
  267. math

    how do you figure out the problem to what is the area of the following square where one side is 21in A= s2nd power

    asked by nysanah
  268. social studies

    where is antigua volcano

    asked by john
  269. statistics

    The highest acceptable level of pesticide found in quail has been limited to 0.35 parts per million (ppm). A hunting organization measured the level of the pesticide found in a random sample of 20 quail harvested from field trials. The sample produced a

    asked by bill
  270. Natural Regions

    What benefits would Old growth trees provide for the logging industry? Paper is the only advantage I can think of.

    asked by Anonymous
  271. math

    is a line graph a table?

    asked by danny
  272. math

    is a line graph a table?please help!!

    asked by danny please help!!
  273. Japan's Nuclear Crisis

    I don't know why. Please help me. Why did the reactors at the Fukushima plant overheat? Because of Nuclear power generation?

    asked by Anonymous
  274. math

    you save 6 dollars on monday.each day after that you save twice as much you saved before.what table can i make to solve?please help!!!!!!!!!!

    asked by Andrew-please help!!!!!
  275. Maths and Physics

    Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 (10 marks).

    asked by David
  276. Algebra

    (2 the square root of 3+1)(the square root of 3-4)

    asked by Veronica
  277. Maths

    Are zeros which are after the decimal point significant?

    asked by Louise
  278. science

    what is the lfe expectancy of a person with tay-sachs disease

    asked by brianne
  279. managerial eco

    A single price setting monopolist faces the demand : P = 4000-5Q, TC = 0 + 400Q. For the single price-setting monopolist, tell me profit maximizing quantity, price,total revenue, total cost, profit and consumer surplus.

    asked by cj
  280. math

    Simply the expression 3(2+3) squared/ 7-2 - 10 squared/5

    asked by Nick
  281. chemistry

    i am trying to find the average rate of h2? from mastering chemistry home work. part a answer was 0.027m/s and part b answer was 0.054m/s. i cant find part c home answer

    asked by Tasha
  282. Math

    Solve for x log 1000=x

    asked by Tiffany
  283. JAPAN

    What advice did the japanese government give to people living near the Fukushima power plant? Residents within 20 km of the facility were told to leave and those within 30 km were told to stay indoors with doors and windows sealed. Anything else?

    asked by Anonymous
  284. English

    Is this a correct use of a semi-colen?: "However Petra was taken over in 100 CE by the Romans, and was still occupied during the Byzantine period; but it soon became not as much of an importance after that, besides being used as a fort for the Crusaders in

    asked by Becca
  285. Nuclear Crisis Worker appreciation

    the workers who have been trying to bring the nuclear crisis under control volunteered 4 the job. what factors might they have weighed when deciding whether or not to stay behind and help. What qualities do you think these people must possess? Why do you

    asked by Anonymous
  286. Science

    What happens to your image that is initially observed in a flat mirror from 10 feet away and then you move further away to 20 feet?

    asked by Jessica
  287. Prime Minister

    If you were Prime Minister Stephen Harper, what position would you take on the issue of nuclear power generation in Canada? I would just stop, and end the nuclear generations. It's better than dealing with risks, and entering the zone of danger. I need

    asked by Anonymous
  288. math

    can some one help 3>4+5+

    asked by tom
  289. English

    I urgently need to check if everything is correct. I hope everything is OK. 1) Outline the main features of the Renaissance with particular reference to its concept of order. 2) Remind a friend of yours, who has never flown in an airplane, what he should

    asked by Mike1
  290. Socials

    What advice did the japanese government give to people living near the Fukushima power plant? Residents within 20 km of the facility were told to leave and those within 30 km were told to stay indoors with doors and windows sealed. Anything else?

    asked by Anonymous
  291. Chemistry

    A solution has a volume of 2L and contains 36g of glucose, what is the molaritiy of the solution?

    asked by Bobbi
  292. physics

    You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward.

    asked by ok
  293. Geometry

    A certain type of cube has 2-inch edges. What is the maximum number of cubes than can be put into a box that measures 2.7 feet by 3.2 feet by 4.1 feet?

    asked by Bobbie
  294. physics

    You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward.

    asked by ok
  295. physics

    You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward.

    asked by ok
  296. p

    A square ammeter has sides of length l = 3.75 cm. The sides of the ammeter are capable of measuring the magnetic field they are subject to. When the ammeter is clamped around a wire carrying a DC current, as shown in the figure, the average value of the

    asked by ok