Questions Asked on
March 14, 2011

  1. Chemistry Balancing Equations

    Can you please tell me if these are correct? 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl -----> SO2 + H2O + NaCl 2. Sodium nitrate reacts with hydrochloric acid to produce

    asked by Anonymous
  2. Chemistry

    What is the relationship between delta T and molar mass of solute? The larger the value of delta T, the (larger,smaller) the molar mass of the solute?

    asked by G
  3. Chemistry

    1- Determine the [OH-] and pH of a solution that is .250 M in HCO-3 2- Calculate the [H3O+] and pH of each polyprotic acid solution: a) .125 M H2CO3 b) .125 M H3C6H5O7

    asked by Joey
  4. Are my answers correct? Chem

    I really need help with balancing these equations: Can you check if my answer are correct? Please 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl = SO2 + H2O + NaCl 2. Sodium

    asked by Anonymous
  5. Chemistry Balancing Equations

    I really need help with balancing these equations: PLEASE HELP!! 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride 2. Sodium nitrate reacts with hydrochloric acid to produce nitrogen monoxide

    asked by Anonymous
  6. CHEMISTRY

    Rank these elements according to first ionization energy.. I ranked them like this Ar Cl S P Si Al Mg Na but then it tells me that two elements should move up one spot in the ranking because of stable electrons configurations. Which ones would be moved up

    asked by TYLER CHIRECE
  7. Third Grade Math

    About how much does a button weigh? 1 gram 100 grams 1 kilogram 10 kilograms Thanks!

    asked by Maddie
  8. Chemistry

    The boiling point of another member of this homologous series was found to be 309 K. What is the likely molecular formula for this compound? How many carbon atoms would you expect this new compound to have if its boiling point is between that of a

    asked by Alison
  9. Calculus some1 plz!!!!

    A plane flies horizontally at an altitude of 5 km and passes directly over a tracking telescope on the ground. When the angle of elevation is π/3, this angle is decreasing at a rate of π/4 rad/min. How fast is the plane traveling at that time? (Round

    asked by yolana
  10. 3rd grade math

    Sheila wrote a division story. She asked how may equal groups 24 flowers could be put into. What information must she give about the groups?

    asked by Amy
  11. Chemistry

    If the solvent had been impure (that is, contaminated with soluble material); how woild this affect delta Tf (explain) and how would this effect the calculated molar mass?

    asked by G
  12. science

    how many half-lives have passed if 87.5% of a substance has decomposed? how many if 99.999% has decomposed?

    asked by Kim
  13. Geography

    Analyzing a Political Cartoon Political cartoons are drawings that express a point of view. They generally show public figures, political events, or social or economic situations. The cartoonist may use symbols, labels, captions, or exaggeration to make a

    asked by Coop
  14. math CA

    1. What are the next two terms in each sequence? 2, 4, 8, 14, 22, … (2 points) 30, 38 30, 40 32, 44 32, 46 2. What are the next two terms in each sequence? 1.3, 2.4, 3.5, 4.6, … (2 points) 5.7, 6.8 5.8, 6.9 6.7, 7.8 7.8, 8.9 3. For questions 3–4, use

    asked by Jesicca
  15. Physics

    Find the number of revolutions of a bicycle wheel of diameter 0.7m when the bike goes a distance of 22m down the street.

    asked by Anonymous
  16. Physics

    A billiard ball moving at 5.80 m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 4.81 m/s at an angle of 34.0° with respect to the original line of motion. Assuming an elastic collision (and ignoring friction and

    asked by John
  17. chemistry

    A solution is prepared by dissolving 23.7g of CaCl2 in 375.0g of water. The density of this solution is 1.05g/mL. determine the concentration (molarity) of Cl in solution.

    asked by jim
  18. Socials

    In what ways did the Conferences reflect Victorian social values and beliefs? In ur answer, consider the roles that women and Native people were allowed to play in the negotiations. The women were a force that helped to build a sense of communal solidarity

    asked by Sara
  19. math (plz help)

    In a movie theater, theater A has 30 seats in the first row. Each next row has 4 more seats in it than the previous row has. 1) How many seats are in the 4th row? 2) Is there a row with exactly 60 seats in it? 3) Theater B has 40 seats in the first row and

    asked by Stacy
  20. Physics

    A billiard ball moving at 5.80 m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 4.81 m/s at an angle of 34.0° with respect to the original line of motion. Assuming an elastic collision (and ignoring friction and

    asked by John
  21. AP Biology- Molecular Genetics

    The correct sequence between genes and their phenotypic expression is a) RNA-DNA-protein-trait b) DNA-RNA-protein-trait c) Protein-DNA-RNA-trait d) trait-DNA-RNA-protein I think it is either b or d but do not know if the trait is at the beginnig or end...

    asked by Jill
  22. Statistics

    A survey found that 25% of pet owners had their pets bathed professionally rather than doing it themselves. If 20 pet owners are randomly selected find the probability that between 12 and 7 pet owners, inclusive, have their pets bathed professionally.

    asked by Ashley
  23. Physics

    A particle of mass M moves through the lab at 0.6c. Suddenly it explodes into two fragments. First fragment, with mass 2M/3 , moves at 0.8c in the same direction that the original particle had been moving. Determine the velocity (magnitude and direction)

    asked by Pardis
  24. Chemistry help!!!

    Calculate [H3o+] in each aqueous solution at 25*C, and classify each solution as acidic or basic. a. [OH-]= 1.1 x 10^-9M b. [OH-]= 2.9 x 10^-2M c. [OH-]= 6.9 x 10^-12M

    asked by sally
  25. Physics

    While watching ocean waves at the dock of the bay, Otis notices that 9 waves pass beneath him in 28 seconds. He also notices that the crests of successive waves exactly coincide with the posts that are 5 meters apart. What are the period, frequency,

    asked by Smithy
  26. Chemistry

    How many moles of chloroform, CHCl^3, are required to fill a 253-ml flask at 100.0 degrees Celsuis and 940 torr?

    asked by Nick
  27. PHYSICS

    1..........At what temperature of 0^C steel rod & copper rod have length of 800.1cm and 99.9cm respectively. At what temperature will the 2 rods have the same length. Coefficients of linear expansion (per °C) copper rod----.000017 steel rod-------.000012

    asked by eissa
  28. math

    (a). Determine the DFS tree of K3,3. (b). Determine the BFS tree of K3,3.

    asked by aj
  29. A plane flies horizontally at an altitude of 5 km

    A plane flies horizontally at an altitude of 5 km and passes directly over a tracking telescope on the ground. When the angle of elevation is π/3, this angle is decreasing at a rate of π/4 rad/min. How fast is the plane traveling at that time? (Round

    asked by yolana
  30. physics

    A 88g arrow is shot from a bow whose string exerts an average force of 110n on the arrow over a distance of 78cm.What is the speed of the arrow as it leaves the string?

    asked by Mark
  31. Chemistry

    A sample of air occupies 3.8 L when the pressure is 1.2 atm. (a) What volume does it occupy at 7.3 atm? (b) What pressure is required in order to compress it to 0.050 L? (The temperature is kept constant.) I already know the answers to each question, but

    asked by Alex
  32. US History

    What can you infer about Truman's successful tactic of attacking the "do-nothing congress"?

    asked by Rachel
  33. Physics

    (a) Calculate the speed of a proton after it accelerates from rest through a potential difference of 285 V.

    asked by Xid
  34. Chemistry

    If the freezing point of a pure solvent is 6.00 degrees Celsius, will the solvent which is contaminated with a soluble material have a freezing point (higher than, lower than or same as) 6.00 degrees Celsius? Explain.

    asked by G
  35. Chemistry

    The freezing point of a cyclohexane sample is 6.20*C. A soltuion is prepared by dissolving 0.4660g of an unknown solute in 36.0g cyclohexane. The freezing point of the solution if 4.11*C. Calculate the molar mass of the unknown solute. Kf for cyclohexane

    asked by K
  36. chemistry

    In a chemical reaction, substance A combines with substance B to form substance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a> and

    asked by mike
  37. Chemistry

    Assume you had used a well calibrated thermometer to measure the freezing point of a solvent, can you tell from the cooling curve if the solvent is contaminated with soluble material? If yes, how can you tell?

    asked by G
  38. physics

    What should be the spring constant of a spring designed to bring a 1300 car to rest from a speed of 95 so that the occupants undergo a maximum acceleration of 6.0 ?

    asked by cool
  39. chemistry

    Calculate the molar solubility of in the following substances. Pure water and 1.5×10−3 K2CrO4

    asked by Bob
  40. Social Studies

    What material was used to plug the eye sockets during mummification process?

    asked by Anonymous
  41. chemistry

    how many grams of calcium nitrate are needed to make 100mL of a 0.5M solution

    asked by Anonymous
  42. math

    A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the

    asked by aj
  43. Physics

    What must be the orbital speed of a satellite in a circular orbit 740 km above the surface of the earth?

    asked by Dayna
  44. Physics

    A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction of motion. Find the angle

    asked by Pardis
  45. math

    Bill and Rosa have only nickels and dimes. Rosa has 75 cents and Bill has 90 cents. Each has the same number of coins and Bill has the same number of dimes as Rosa has nickels. How many nickels does Rosa have?

    asked by Angie
  46. Chemistry

    What is a photon? Several selections may be correct. Has an energy of equal to hν. Is a unit of electromagnetic radiation. Is a part of the electromagnetic spectrum. Is usually called visible light. None of these.

    asked by Joel
  47. Chemistry

    Why would you use weighing paper instead of filter paper for weighing the unknown sample?

    asked by G
  48. Chemistry

    Why does 0.10M acetic acid exhibit different conductivity from that of glacial acetic acid?

    asked by G
  49. chemistry

    A 150.0 mL flask contains 0.391 grams of a volatile oxide of sulfur. The pressure in the flask is 750 mmHg and the temperature is 22C. Is the gas SO2 or SO3?

    asked by Rachel
  50. math college

    A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the

    asked by aj
  51. college math

    You won the lottery. They will pay you 1 million dollars a year for 20 years. Assuming 10 percent interest compounded continuously, approximate the present value of your winnings by assuming the money is paid to you continuously over the period of each of

    asked by aj
  52. physics

    How far apart must two protons be if the electrical force of repulsion acting on either one is equal to its weight.

    asked by lol
  53. Physics

    The crests on a long surface water wave are 22 m apart, and in 1 minute 8 crests pass by. What is the speed of this wave?

    asked by Smithy
  54. SCI 207

    What is Brazil’s Cerrado, and how is agriculture affecting it?

    asked by MARYLANIZ
  55. physics

    A straight ladder is leaning against the wall of a house. The ladder has rails 4.80 m long, joined by rungs 5.100 m long. Its bottom end is on solid but sloping ground so that the top of the ladder is 3.100 m to the left of where it should be, and the

    asked by kia
  56. Socials

    Did Macdonald succeed in getting the kind of Confederation he had hoped for? Explain your answer. Im guessing not because Macdonald had hoped for a strong national government, which didn't happen. The nation was made into a federation. Am I right?

    asked by Sara
  57. Calculus

    Suppose a 6ft. man is 10 ft. away from a 24 ft. tall lamp post. If the person is moving away from the lamp post at at rate of 2 ft/sec, at what rate is the length of his shadow changing?

    asked by Anonymous
  58. Trig

    Find all values of theta in the interval 0

    asked by Waldo
  59. math

    (a). For any connected graph G, all internal nodes of the BFS tree on G have the same number of children. (b). For any connected graph G, the DFS tree on G and the BFS tree on G have the same number of edges.

    asked by aj
  60. math

    i need to unscramble these math words icarlafto untoegrnc enitmelgen

    asked by bre
  61. Chemistry

    Determinne the amount of Dextrose and NaCl in 500ml of 5% DNS. (The solution is 5% in regards to dextrose and 0.9% in regards to NACl.)

    asked by Sonya
  62. chemistry

    A 10.00g sample of a mixture of CH4 and C2H4react with O2 at 25C and 1 atm to produce CO2 and water. If the reaction produces 520kJ of heat what is the mass percent of CH4 in the mixture? I don't want the answer just how to o

    asked by Aly
  63. physics

    A small motor draws a current of 1.76 A from a 110 V line. The output power of the motor is 0.20 hp. (a) At a rate of $0.060/kWh, what is the cost, in cents, of operating the motor for 4.0 h? (b) What is the efficiency of the motor? for (a) i am doing

    asked by julie
  64. math

    1) What is 20% of 30? 2) What is 30% of 20? 3) If m and n are any whole number, is m% of n always equal to n% of m? Explain the answer and support it with 2 examples.

    asked by Stacy
  65. Physics

    A soldering iron uses an electric current in a wire to heat the tip. A transformer with 100 turns on the secondary coil provides 54 W at an rms voltage of 26 V. a) How many turns are in the primary coil? b) What is the current in the primary coil?

    asked by Bob
  66. math

    a bank account earns 7% annual interest compounded continuously. you deposit $10,000 in the account, and withdraw money continuously from the account at a rate of $1000 per year. a. write the differential equation for the balance, B, in the account after t

    asked by Anonymous
  67. mathematicas

    how do i do my homework quickly like a ninja but thoroughly??

    asked by Caitlin
  68. math

    i need to unscrmble th word enitmelgens its som math term HHHHEEEELLLLPPP!!!!!!!!!!!!!!!!! please:)

    asked by bre
  69. calculus SIMPSON RULE

    Use Simpson's Rule and all the data in the following table to estimate the value of the integral . x -16 -15 -14 -13 -12 -11 -10 y -8 9 4 9 -5 -9 3

    asked by aj
  70. amy

    how do i solve this 2 ln(x-3)= ln(x+5) + ln4

    asked by math
  71. Science

    Sperm cells have very little cytoplasm, while egg cells have a lot of cytoplasm. How do these different structures support the different functions of eggs and sperm?

    asked by Jess
  72. math

    In a movie theater, Theater A has 30 seats in the first row. Each next row has 4 more seats in it than the previous row has. 1) How many seats are in the 4th row? 2) Is there a row with exactly 60 seats in it? Explain. 3) Theater B has 40 seats in the

    asked by David
  73. Physics - Transformer in AC

    A soldering iron uses an electric current in a wire to heat the tip. A transformer with 100 turns on the secondary coil provides 54 W at an rms voltage of 26 V. a) How many turns are in the primary coil? b) What is the current in the primary coil?

    asked by Bob
  74. chemistry

    when 0.1M solutions of the following substances are mixed, which pair will precipitate? 1) Pb(CH3COO)2 and Mg(NO3)2 2) H2SO4 and KOH 3) ((NH4)2)CO3 and Na3PO4 4) NaOH and BaCl2 5) CaCl2 and Na2CO3

    asked by jim
  75. English

    Thank you very much for helping me improve my questions. What do you think of this activity? Can you think of any other questions to include? 1) Do you support any charities? 2) What clothes are fashionable among teenagers in America these days (??)? 3)Do

    asked by Mike
  76. english

    Both editors in chief asked for leave of absences at the same time. would the correct form be.... leaves?

    asked by Sarah
  77. PHYSICS

    1..........At what temperature of 0^C steel rod & copper rod have length of 80.1cm and 99.9cm respectively. At what temperature will the 2 rods have the same length. Coefficients of linear expansion (per °C) copper rod----.000017 steel rod-------.000012

    asked by eissa
  78. physics

    A tire placed on a balancing machine in a service station starts from rest and turns through 10.8 revolutions in 8.48 s before reaching its final angular speed. Calculate its angular acceleration.

    asked by Emily
  79. capitalization

    Which words in the following title ought to be capitalized? This is how I was intending to capitalize it: To not only Look Inside Oneself but also Reach out to Others. I already knew that one is supposed to capitalize the first word, the last word, and all

    asked by touché
  80. physics

    A dock worker loading crates on a ship finds that a 25 kg crate, initially at rest on a hori- zontal surface, requires a 90 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 51 N is required to keep it

    asked by Sara
  81. chemistry

    GIVEN: 4NH3 + 5O2===> 4NO + 6H2O Now, in a container 6.0moles of NH3 are mixed with 8.0moles of O2. If the reaction produces 8.0moles of H2O, what is the percent yield of this reaction?

    asked by jim
  82. chemistry

    4.72 moles of sulfur trioxide molecules contain how many oxygen atoms? i know the answer is 8.53 x 10^24 but i do know how my professor got it **this is one of my practice exam question!

    asked by jessica
  83. Physical science

    A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. How much did the hockey puck accelerate? How much force was exerted on the puck? How much force did the puck exert on the hockey stick?

    asked by Aj
  84. neeeedddd help noooow!!!

    34. EB = x + 3 and BD = 14. What is the value of x?(2 points)

    asked by Jesicca
  85. Math

    If the square root of a number is an integer, the number is called a perfect square. one example of a perfect square is a.) 50 or b.) 81

    asked by Isabelle
  86. Math

    A circular swimming pool is 4 feet deep and has a diameter of 15 feet. If it takes 7.5 gallons of water to fill one cubic foot, to the nearest whole number, how many gallons are needed to fill this swimming pool.

    asked by Anonymous
  87. modeling exponential growth

    hey. the directions say identify the initial amount "a" and the growth factor "b" in each exponential function. i've looked at the examples given and i still don't understand. the first problem is g(x)=20x2^x or g(x) equals twenty times two to the "x"

    asked by kiana
  88. marketing

    consumer services then to be intangible.and goods tend to be tangible, use an example to explain how the lack of a physical good in a pure service might affect efforts to promote the service.

    asked by rose
  89. Physics

    An airline pilot pulls her 12.0 kg rollaboard suitcase along the ground with a force of 25.0 N for 10.0 meters. The handle she pulls on makes an angle of 44.0 degrees with the horizontal. How much work does she do over the ten-meter distance?

    asked by Ryan
  90. college math

    A business associate who owes you 3600 dollars offers to pay you 3360 now, or else pay you three yearly installments of 1200 each, with the first installment paid now. Assume that the interest rate will be 7 percent (compounded continuously). Find the

    asked by aj
  91. English

    The questions I selected are as follows. I'd like you to improve my vocabulary. 1) Why did you decide to join the school/or students' exchange? 2) What do you expect from it? Can you say anything in Italian? If yes, where did you learn it? 3) Can you get

    asked by Mike
  92. math

    Use an inequality to solve the problem. Be sure to show the inequality and all of your work. The area of a triangle must be at most 32.5 square inches. The base is 13 inches and the height is x inches. Find the possible values for x.

    asked by Anonymous
  93. Chemistry

    if 50 g of HCL is dissolved in 100 g of water at 40 C, how much HCL must be added to the solution in order to saturate it? the answer is about 12g but can you explain how to get this answer? thanks.

    asked by Jazmin F.
  94. English

    Does this question make sense: What is the author portraying in this chapter? or What are the emotions being portrayed in this chapter?

    asked by Ann
  95. Business

    If one company(A) owns another company(B) and Company B owns a third company (C) is it safe to say that Company A owns part of Company C? A real life example is the sports media group TSN is 20% owned by ESPN. ESPN is then in turn 80% owned by The Walt

    asked by Don
  96. Geometry

    Given: Triangle ABC ~ Triangle DEF, m

    asked by mic
  97. Physics

    While watching ocean waves at the dock of the bay, Otis notices that 10 waves pass beneath him in 30 seconds. He also notices that the crests of successive waves exactly coincide with the posts that are 5 meters apart. What are the period, frequency,

    asked by Shannon
  98. microbiology

    How do i plot a semi log graph for OD vs. time? The values for OD are under 1

    asked by micro
  99. chemistry

    What is the ionization constant of a weak acid with pKa = 8.0?

    asked by Ann
  100. Chemistry

    The combustion of 75.5 liters of 2- propane (c3h6)with 95.5 liters of oxygen gas is extremely exothermic. What is the maximum amount of water (in grams) to be made from this and how much of the non-limiting reactant is unused at the end (in liters)?

    asked by Nicole
  101. Physics

    Three objects with masses m1 = 36.3 kg, m2 = 17.7 kg, and m3 = 11.1 kg are hanging from ropes that are redirected over pulleys. What is the acceleration of m1? Negative numbers for downward, and positive numbers for upward, please.

    asked by Ebu
  102. math

    Eight one-inch cube are put together to make a “T”. If the complete figure is painted blue, how many cubes have exactly for blue faces? How are the remaining cubes painted?

    asked by Ryan
  103. Maths

    There are 3 vectors: p= 7i + 10j q= 3i + 12j r= -i +4j Could you show me how to find the angle PQR. using the scalar product.

    asked by Anique
  104. Chemistry

    Calculate the pH of a 25 mL sample of distilled water after the addition of 1 mL, 2 mL, 3 mL, 4 mL, and 5 mL of NaOH and HCL. (0.1 M HCl and NaOH) In total, you need to show 10 calculations.

    asked by Mariah
  105. Complete subjects and predicates

    Underline the complete subject with one line and circle the simple subject. Underline the complete predicate with two lines and circl the simple predicate. 1. A young girl walks carefully along the rocky shore. 2. Carmen notices the tide going out. 3.

    asked by Diane
  106. World History

    What was the fourteen points?

    asked by Daisy
  107. Science

    1. In an experiment performed by Gregor Mendel the results were are as follows. Two pea plants were crossed both were heterozygous for two traits, YyRr, yellow and round. The following F1 offspring were obtained, 315 round yellow, 101 wrinkled yellow, 108

    asked by Jessie
  108. Chemistry

    1. A bottle of juice at room temperature is placed in a bucket of ice inside a box. The box, bottle, and bucket of ice represent a closed system. Which of the following statements is true? (2.0 points) (Points : 2) Heat flows from the ice to the juice

    asked by jeje
  109. Chemistry

    An unknown compound X is one of the four compounds listed in the table below. A mixture of X with o-toluic acid melts at 100 degrees Celsius, a mixture of X with benzoic acid melts at 112 degrees Celsius, a mixture of X with phenyl succinate melts at 110

    asked by Jenna
  110. PHYSICS!!

    a student pushes a 10 kg box across a warehouse floor. if the boz accelerates at 3 m/s/s and the force of friction is 20 newtons determine the size of the students applied force

    asked by chrissy
  111. BIOCHEM

    what are the problems created by using molecular oxygen as a recipient of the electrons from the oxidation of carbon compounds.

    asked by DAN
  112. marketing

    discuss how you might use the new product development process if you were thinking about offering some kind of seummer service to residents in a beach resort town

    asked by rose
  113. Algebra

    How to factor 4x^3 -4x+16 ?

    asked by Mehak
  114. physics

    A 5.4 kg block slides down an inclined plane that makes an angle of 38 with the horizontal. Starting from rest, the block slides a distance of 2.5 m in 5.3 s. The acceleration of gravity is 9.81 m/s2 . Find the coefficient of kinetic friction be- tween

    asked by Sara
  115. Chemistry

    If some soluble material contaminated your solution after it had been prepared, how would this effect the measured delta Tf and the calculated molar mass of solute? Explain.

    asked by G
  116. Algebra

    Explain why the addition method might be preferred over the substitution method for solving the system 2x-3y=5 5x+2y=6 Am lost on these.Please help

    asked by Logan
  117. science

    The projectile is fired at an angle of 45 degree to the horizontal with an initial speed of 100 feet per second. Show work.

    asked by kasey kim
  118. Discrete Math

    Congruence True or False: (give reason) _ __ 2 ∈ 18 (mod 8) Can someone please help with this problem? I'm confused. . . Thanks for any helpful replies.

    asked by Francesca
  119. physics

    In a steam radiator, steam at 110°C condenses and the liquid water formed is cooled to 80°C. How much heat per gram of liquid formed, is released in this process?

    asked by dawn
  120. math

    Problem A: Let T be a balanced 5-ary tree with 81 nodes. (a). How many internal nodes does T have? (b). How many edges does the tree T have? (c). What is the height of T?

    asked by aj
  121. math

    what is the product of (x+4)and (x-5) j

    asked by pavleen
  122. math

    5 hockey pucks and three hockey sticks cost $23. 5 hockey pucks and 1 hockey stick cost $20. How much does 1 hockey puck cost?

    asked by Sally
  123. Chem

    What gas is formed in HCl + NaHSO3? is it sulfur dioxide

    asked by Anonymous
  124. chemistry

    what is the molarity if 0.5 grams of sodium chloride is dissolved to make 0.05 mL of solution?

    asked by tom
  125. Physics

    If a wave vibrates up and down once each second and travels a distance of 11 m each second, what is its frequency?

    asked by Smithy
  126. chemistry

    26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.

    asked by Daniel
  127. differential equation

    A simple pendulum of length is oscillating through a small angle θ in a medium for which the resistance is proportional to the velocity. Obtain the differential equation of its motion and discuss the motion.

    asked by shasha
  128. Math

    A molecule of water is made up of 2 atoms of hydrogen and 1 atom of oxygen. What percent of the atoms of a water molecule is oxygen?

    asked by Sammy
  129. chemistry

    26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.

    asked by Daniel
  130. English

    Here are some more sentences I'd like you to revise. 1) Several symbols are used to explore the theme of the double. The setting of the novel is ambivalent since it seems to be halfway between England and Scotland, London and Edinburgh. 2.Both capitals

    asked by Franco
  131. Math

    Find the exact value of Sin^-1(sin(13pi/15))

    asked by Kelly
  132. math

    While writing the date 6/15/90 (June 15, 1990), James noticed that the month (6) times the day (15) equaled the year (90). There are four other dates in 1990 that fit this equation. Find and list them. What do Bastille Day and Christmas ever in any yeah

    asked by Evangelise
  133. college chem

    Calculate the pH of a 25 mL sample of distilled water after the addition of 1 mL, 2 mL, 3 mL, 4 mL, and 5 mL of NaOH and HCL. (0.1 M HCl and NaOH) In total, you need to show 10 calculations.

    asked by Mariah
  134. Chemistry

    a 23ml H2SO4 solution is titrated by 50 ml 0.10 M NaOH solution, what is the molarity of H2SO4 solution? (Note that H2SO4 is a diprotic acid)

    asked by Joel
  135. Math

    Walking along the outer circular edge of a rotating merry-go-round, Samantha completes one revolution in 11 sec walking one direction and 21sec walking the other direction. What is the rotational speed of the merry-go-round?

    asked by Merry go round
  136. Math

    Hello, I am learning about Taylor series in school, but they are quite confusing.. Can you please explain how I should do this problem? Thank you very much! What is the Taylor polynomial of order 5 approximation to sin(1.5) ? I know the series of sinx = x

    asked by Kiksy
  137. physics

    5. What is the electric potential at the center of the square shown in the figure below? Assume that q1 = 1 x 10-8 C, q2 = -2 x 10-8 C, q3 = 3 x 10-8 C, q4 = 2 x 10-8 C and d = 1 meter.

    asked by ike
  138. physics

    8. The current in a simple series circuit is 5 amp. When an additional resistance of 2 ohms is inserted in series, the current drops to 4 amp. What is the resistance of the original circuit?

    asked by okay
  139. Budget project - Anonymous

    http://www.jiskha.com/display.cgi?id=1300146111 = Your earlier post http://img145.imageshack.us/f/60103724.jpg/ #1 - March's wages should be $2000.00 and the savings for March should be $1200.00 (as you have it). #2 - The total for March should be $325.00

    asked by Writeacher
  140. Typing

    If you cut a letter-sized document into 4 equal pieces (4-up), what are the dimensions of each piece?

    asked by Alex
  141. people

    What is the verb and adverb in this sentence....The unpredictable volcanic activity discourages people from living there.

    asked by Anonymous
  142. Chemistry

    It took 400 calories of heat to raise 50 mL of water from 20 degrees Celsius to its final temperature. What was that temperature? Ok I understand the equation q=mass x SH x change in temp. I am lost on how to set it up to find my final temp. Please help.

    asked by Shambrey
  143. English

    Which one is the correct sentence? If they both need grammar work do tell. a)This gives evidence that people will work hard, but will never receive a fair deal for their effort. OR b)This gives evidence that people will be working hard, but will never

    asked by Alice
  144. Math Trig

    Find all solutions on the interval [0,2pi] for the following: 2sin^2(x)-5sin(x)=-3 cos^2(x)+sin(x)=1

    asked by Kelly
  145. Algebra

    When solving a system of equations by the addition method, how do you know when the system has no solution?

    asked by Logan
  146. World History

    What is the diffrence between totalitarianism and Fascism? which countries in WW2 went to which between the two? what where thier goals?

    asked by kylie
  147. chem

    A 27.4 mL sample of an unknown HClO4 solution requires 45.4 mL of 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is shown below. HClO4(aq) + NaOH(aq) H2O(l) + NaClO4(aq)

    asked by BOBBY
  148. Intro to psychlogy

    Which one of the following statements about intelligence is the most accurate? IQ is a valid measurement, and environmental factors do not change mental ability. Intelligence is mostly genetic, has the most variability between groups, and is reliable

    asked by Chloe
  149. Math (Statistics)

    I am to find the mean, variance, and standard deviation for the probability distribution. I don't even know where to start. Here is the problem x P(x) 0 0.19 1 0.32 2 0.28 3 0.21

    asked by Heather
  150. Algebra

    why is 5^0=1 Not understanding it. also can you explain when (-3)^n is positive and when it is negative.

    asked by Tyler
  151. physics

    a boy is running across slipery flnr at 4.0 m/s and whn he decides to slide.if the coefficient of friction betwn his shoe and floor is0.250,hw far wil he slide before stopping

    asked by cleo
  152. Physics please help!!

    The mass of a star is 1.49·1031 kg and it performs one rotation in 26.1 days. Find its new period (in /days) if the diameter suddenly shrinks to 0.59 times its present size. Assume a uniform mass distribution before and after.

    asked by Megan
  153. algebra

    15(s-3)=12s-43 How would I go about solving this problem?

    asked by niK
  154. To Writeacher

    Budget Project from yesterday-- INTRODUCTION Imagine yourself seven years from now. You are approximately 22 years old, and are looking to start a career after you have taken the previous four years for post-secondary education, travel, and some work. You

    asked by Anonymous
  155. physics

    There is a 1500 mile race course. I MUST have a top speed of 36 meters/s (meaning I cannot go over 36). The max foward acceleration is 4 m/s squared and the max backward acceleration is 6 m/s squared. I start at 600m and must go to the 800m mark (I must

    asked by hanna
  156. Diff eqn- IVP

    The differential equation that governs the forced oscillation is shown below: 0.2 d²y/dt² + 1.2 dy/dt +2y = r(t) where r(t) is the external force. Given that r(t) = 5 cos 4t with y(0) = 0 . find the equation of motion of the forced oscillations

    asked by shasha
  157. math

    What is the derivative of y=x^2*e^x

    asked by Anonymous
  158. math !!!! :O

    Emily’s dad pays her for picking strawberries. Each hour she works he increases her pay. The first hour she earns two cents, the second hour she earns four cents, the third hour eight cents, and so on, doubling the amount each hour. How much money will

    asked by evelyn
  159. social studies

    lesson we can get in the king arthur

    asked by Anonymous
  160. Further maths

    But i need a more detail explanation find the derivative function of the differential calculus (2x+3)^3(4x^2-1)^2

    asked by Stanley dominic
  161. Physical science

    Two hunting forks are struck at the same time. One tuning fork has a frequency of 20 Hz while the second fork has a frequency of 226 Hz. How many beats will result?

    asked by Aj
  162. math

    5% of $1000.00

    asked by ann
  163. Physics

    If you have two tables and in Table 1, is using the indirect method and you have the measurements, 11.37 and 12.57 cm. In Table 2, is using the direct method which has the measurement of one item out of 100 with the measurements of 0.642, 0.741, and 0.683

    asked by Jessica
  164. Algebra

    12(74y - (6+5Y - 8Z) = Please show work

    asked by TODD
  165. english

    a friend has a new baby and has invited you to her house . write a letter accepting the invitation . ask for two questions that you need before the vist .

    asked by sarah
  166. Math

    Please share a strategy with me. I also added answer choices to the first problem. What is the best way to solve the following problems: Sam's family eats 4 to 6 apples every day. Which is a reasonable number of days that it will take Sam's family to eat a

    asked by Mattie
  167. math

    8.33 x 10 to the negative power 46

    asked by shelly
  168. social studies

    taxes are used for many things.for reparing schools and community buildings.please give me another way how taxes are used.

    asked by alexander- very important!!!
  169. math

    name the lenths of the sides of three rectangles with perimeters of 12 units. use only whole numbers

    asked by derrick mack
  170. chemistry

    Write down the reaction between 1-pentyne and 2 molar HBr should it be 2 br or 4 br? img718.imageshack.us/i/triple2.jpg/

    asked by ben
  171. Economics - Theory of the Firm

    If Average Variable Cost AVC = 10 + Q and P = 50. Find: Total Cost TC, Total Fixed Cost TFC, Total Variable Cost TVC, Average Total Cost ATC, Average Fixed Cost AFC

    asked by Student55
  172. Complete subjects and predicates

    what is the complete subject and complete predicate to : These crustaceans wait for feeding time at high tide.

    asked by Bailey
  173. physics

    Five forces act on an object: (1) 60.0 N at 90°, (2) 40 N at 0°, (3) 80 N at 270°, (4) 40 N at 180°, (5) 50 N at 60°. What are the magnitude and direction of a sixth force that would produce equilibrium

    asked by jon
  174. prealgebra

    What is the answer 0.3m+2.4M=0.1m+4

    asked by Amber shall
  175. mah

    factorise (5+9x-2x^2)/ ((x^2-6x+23)^ (5/2))

    asked by claire
  176. Chemistry II

    100 grams of KNO3 is dissolved in one liter of water. Calculate the freezing point depression and boiling point elevation.

    asked by Michelle
  177. Science

    The half-reaction of 3 Pb + 2 NO3 + 8 H-->3 Pb2+ + 2 NO + 4H2O

    asked by Noluvuyo habasisa
  178. Chemistry II

    How much energy would be required to heat 60 grams of water from -50 degrees C to 200 degrees C?

    asked by Michelle
  179. math

    owen has a 4in x 6 in photo. he wants to get the photo enlarged to an 8in x 10 in size. find the scale factor

    asked by danny
  180. Socials

    Confederation: For and Against. How do Macdonald and Howe represent the presence of the United States? In a paragraph, describe who, in your opinion used the American factor most effectively. Macdonald mentions Americans, but I cant find where they talk

    asked by Sara
  181. English

    1) Four American 17-year-old students will be in class with us tomorrow for an hour. 2) I need to prepare some activities to entertain them. They can't speak any Italian so the activities must be English. 3) I was thinking of preparing a questionnaire

    asked by Mike
  182. Complete predicates and subjects

    Complete subjects and predicates - Bailey, Monday, March 14, 2011 at 9:52pm Ms. Sue, would crustaceans be the Complete Sub and the rest of the sentence be the complete predicate? If a sentence has the verb are, can that be a complete predicate as well?

    asked by bailey
  183. Public Administration

    I need to write a research paper. I picked the economic impact of illegal immigration. I am having trouble figuring out what the independent, dependent, and control (if any) variables could be. I need to have at least one of each. I am thinking one

    asked by Cassidy
  184. English

    I have some doubts on how to rephrase a few sentences on Dr. Jekyll and Mr Hyde. I hope you can have a look at them. 1)The story is told from the point of view of Mr. Utterson, a London lawyer and friend to the brilliant scientist Dr Henry Jekyll. 2) After

    asked by Mike
  185. social studies

    who was the self made millionare from florida who started the door-to-door sale after the civil war???????? I NEED HELP!

    asked by leila
  186. Chemistry

    It took 400 calories of heat to raise 50 mL of water from 20 degrees Celsius to its final temperature. What was that temperature?

    asked by Shambrey
  187. science

    how do scientists determine wether or not something is physical or chemical?

    asked by annomous
  188. PHYSICS!!

    free body diagram of a 4 kg bucket accelerating downward 2 meters per second squared

    asked by chrissy
  189. Math

    What is the decimal equivalent of 1/4

    asked by Alex
  190. Math

    The capacity of a measuring pitcher is 96 fluid ounces. How many quarts can the pitcher hold?

    asked by Andrea
  191. Chemistry

    If some insoluble material contaminated your solution after it had been prepared, how would this effect the measured delta Tf and the calculated molar mass of solute? Explain.

    asked by G
  192. geomagnetism

    What are the effects of geomagnetism in human health?

    asked by starzy
  193. Chemistry

    Why did we have to use the same thermometer for finding, the freezing point of both, solvent and solution? If your thermometer was not calibrated (reading 0.05 degrees Celsius below the correct temperature), how would this effect your measured value of

    asked by G
  194. biology

    what can we use to measure exactly 0.55ml of water. and what can we use to measure exactly 85ml of water.

    asked by Anonymous
  195. math

    which of the following is a prince F)1 G)31 H)51 J)57

    asked by pavleen
  196. Law - understanding terms

    I have this worksheet which asks me "historical barriers to achieving equality right" and the other coloumn asks "contemporary barriers to achieving equality rights" What is the difference between them.. is it the historical one is the history in the late

    asked by Babelii
  197. science

    How do you calculate the atomic mass of magnesium? 79% magnesium-24, 10% magnesium-25, 11% magnesium-26

    asked by katie
  198. science

    what is 1 important fact on carbon?

    asked by friend
  199. english

    Hi I need help and I appreciated it. am kind of confused and don't what to write. I have to do journal where I see, read, explore, observe about Intersecionality. How can I start writing about this? Thanks

    asked by Janet
  200. Chem

    If it takes 600 calories of heat to raise 75ml of water to a final temp of 96 degrees C. What is the initial temp. How do I set this problem up if I don't know my change in temp?

    asked by Sham
  201. math (plz help)

    Ms. Sue has not answered this question where all work must be shown. Plz, Ms. Sue do not answer this one again. Let someone else help me...plz. In a movie theater, Theater A has 30 seats in the first row. Each row has 4 more seats in it than the previous

    asked by Stacy
  202. Geometry

    In triangle ABC, A = (5, 9), B = (3, 1), and C = (11, 3). Write the equation of the altitude from A to BC. Use point-slope form ... y - y1 = m(x - x1).

    asked by mic
  203. chemistry

    i posted this already but i got the answer for someone elses question. the pka of acetone is CH3COCH3 is 19.3 which of these bases is strong enough to deprotonate acetone? a)KOH (pka of H20 = 15.7) b)Na+ -C(triplebond)CH (pka of C2H2 = 25) c)NaHCO3 (pka of

    asked by ben
  204. English

    Imagine you are a working mother of 3 children who has experienced inequity in the workplace regarding pay and conditions. Write a letter to the editor of a newspaper supporting the article. Select 10 words from the spelling list: maternity, crippling,

    asked by Shivi
  205. Political Science

    Compare and contrast potential Realist and Liberalist policies (from an American perspective) towards the recent uprisings in the Middle East. I know the difference between realist and liberalism but I'm just not seeing how to connect them to the recent

    asked by John
  206. medical coding

    What OB/GYN subspecialties specializes in the use of a hysteroscopy?

    asked by anne
  207. Algebra

    rwrite the rational expression with the given denominator (7t/(3t-12))=(?/(6t-24))

    asked by Mia
  208. Geometry

    the area of a regular hexagon is 35" squared. Find the length of a side.

    asked by ryan
  209. physics

    11. The charged plates of a parallel plate capacitor each have a charge density of 3 x 10-3 C/m2. What is the electric field E between the plates?

    asked by ikemaze
  210. SCience

    Light relects off a mirror. Light reflects off the white surface of a ceiling/wall. Why can you see images in a mirror but not in a ceiling or wall? I think it has something to do with the glass in the mirror, but I'm not sure...

    asked by Erika
  211. math

    Clue1: I am less than 20. Clue 2: i am an odd number. Clue 3: I am the square root of 225 Who am I?

    asked by Nina
  212. Ms. Sue

    Ms. Sue could you please erase Yolana's posts?

    asked by Anonymous
  213. Math

    Clue 1: I am less than 1,000. Clue 2: the sum of my 2 digits is 26 Clue 3: my ones digit is 8 Who am I?

    asked by Nina
  214. math

    100- 4 Px + Py +40 = 0 100- 4 Py + Px +40 = 0 Solve the above two equations to get Py = Px = 140/3. How would you solve the two eq above??

    asked by chris
  215. 7th grade honors math

    Which equation represents an inverse variation? A.3x=2y B.2-2x+y=0 C.y squared= x D.xy=5 If you could tell me the anser then explain how you got it that would be awesome!

    asked by Nora
  216. fluid mechanics

    Mount Kilimanjaro is the highest peak on the African continent and rises to a height of approximately 5900m above sea level.Take the gas constant to be 287 J/kg K and the temperature lapse rate to be 0.0065 K/m. It is known that altitude sickness can occur

    asked by jovan
  217. Maths

    a flat rectangualar roof is 20m long and 12m wide. All rain falling on the roof drains into a closed cylindrical water tank. If 1cm of rain falls on the roof find a)how many litres of water drain into the tank Working out shown please

    asked by Meee
  218. pre algebra

    how do i solve systems? example- y=x-2 y=4x+1

    asked by alejandro
  219. math

    The average of 5 numbers is 28. What would the 6th number have to be to bring the average up to 30? Anne’s average in math is 92. She wants to raise her average to 93 so she will make an A. she is taking a test on Friday. What score will she have to make

    asked by katherine
  220. MATH

    what does x equal if x/4-3x/2=-1/2

    asked by Anonymous
  221. science

    light reflects off a mirror. light reflects off the white surface of a ceiling or wall. why can you see images in amirror but not a celing or wall?

    asked by Erika
  222. Physics

    If a wave vibrates up and down once each second and travels a distance of 11 m each second, what is its frequency?

    asked by Smithy
  223. Math

    Find all the two digit prime numbers neither of whose digits are prime.

    asked by Diana
  224. math

    Find a shortcut for computing the sum: 1+3+5+7++11+13+15+17=?? Explain your shortcut and how you could use this same shortcut to find the sum of all the odd numbers form 45 to 99.

    asked by lesly
  225. MATH

    Please check my answers: How are the symbols 3/4, 0.75, and 75% related? They are all different ways to express the same number. 2.(4pts) Use inductive reasoning to predict the next number in the sequence. 1, 2, 2, 4, 4, 8, . . .8 because each number after

    asked by Anonymous
  226. calculus

    A rectangular prismatic tank has the following dimensions :length is 3 m, width is 2m . And depth is 3m .it is being filled with water and the surface level is rising at 20cm/min.what is the inflow rate of water at the tank ?

    asked by Mehak
  227. algebra

    Show three ways the ratio 3 to 5 can be written.

    asked by arezoo
  228. chemistry

    A 10.00g sample of a mixture of CH4 and C2H4react with O2

    asked by Aly
  229. Algerbra

    the minimum size of dance floor that the prom committee is considering is 30' by 30'. they assume that this size will allow 100 couples to be on the dance floor at once. how many square feet of dance space per couple does this size allow? to allow for more

    asked by kylie
  230. economics

    The majority of the world’s diamonds comes from Country A and Country B. Suppose that the marginal cost of mining a diamond is $1,000 per diamond and that the demand schedule for diamonds is as follows: Price Quantity $ 6,000 5,500 5,000 6,500 4,000

    asked by Amanda
  231. poetry, part 2

    hopkins use of seared, bleared, and, smeared is an example of?

    asked by anita
  232. chemistry

    2P(s) + 3Cl2(g) --> 4PCl3(l) What is the vapor pressure of PCl3 at 298K? Show Calculations.

    asked by zfaz
  233. Math

    There is no terminating decimal that, when squared, equals 2. It can also be proved that there is no repeating decimal that, when squared, equals 2. Therefore, The square root of 2 is a.) a rational number b.) no a rational number

    asked by Anonymous
  234. Trigonometry

    Can you verify this identity? cos(4x)cos(2x)= (1/2)[cos8x+cos2x]

    asked by Paul
  235. math

    if the measure of the two opposite angles of a parallogram are: 3x + 40 and x + 50, what is the value of x and the measure of its angle

    asked by marlon
  236. Math

    Find the x. x/16 = 1/4

    asked by Sam
  237. Socials

    What does Mcdonald tell citizens of his proposed confederation would call themselves? Would this be a selling point for French - Canadians? Explain ur answer.....' He said they would call themselves Americans, and I don't get the second question.

    asked by Sara
  238. Health

    Which of the following are skin lesions? A. Wheal, Vesicle, Papilloma B. Impetigo, Herpes simplex, Tinea C. Contusion, Laceration, Abrasion D. Melanoma, Squamous cell carcinoma

    asked by Brianne
  239. Physics

    A hot plate has a resistance of 50 Ω. If the current flowing through it is 2.4 A, then the potential difference across the device is:

    asked by Cora
  240. computers

    which windows feature allows you to personalize your computer system? a. my picture b. control panel default programs d. computer

    asked by Anonymous
  241. math

    identify the rotational symmetry asa fraction of a turn and the angle measure of the smallest turn

    asked by morgann
  242. US HISTORY

    What was happening in Greece and Turkey in the late 1940’s? Was it a success or failure of containment?

    asked by Anonymous
  243. chemistry

    what is a common household example of a colloid, besides milk?

    asked by jen
  244. physics

    a student pushes a 10 kg box across a warehouse floor. if the boz accelerates at 3 m/s/s and the force of friction is 20 newtons. determine the size of the students applied force?

    asked by hi
  245. Dividing Decimals

    I need Help with solving these problems. If you could show me the steps I think I will be able to get it. 1) 0.87/0.2 = 4.35 2)4.4/0.3 = 14.66 3)5.0/5.5 = 0.90 I got the answer by Calculator but when I do it myself I don't see how they got the answer.

    asked by Rina
  246. Math

    How many half-inches are in 13"?

    asked by Alex
  247. apples

    Is the saying "an apple a day keeps the doctor away" true?

    asked by abby
  248. US HISTORY

    What is the arms race and how does it fit with containment?

    asked by Anonymous
  249. Intro to Psychlogy

    One of the best ways to compute heritability is to compare: adopted children compared to adopted siblings. blood relatives who live in the same area. fraternal twins reared in different environments. identical twins reared in different environments. please

    asked by Chloe
  250. Trig

    sin^2x/sec^2x-1

    asked by Kelly
  251. Trig

    Finding all Solutions for 2cos(x)-ã3=0

    asked by Kelly
  252. physics

    6. A square aluminum rod is 1.0 meters long and 5.0 mm on edge. What is the resistance between its ends? What must be the diameter of a circular 1.0 meter long copper rod if its resistance is to be the same

    asked by okay
  253. typing

    What is the size of the margin (inside the business card) to prevent text and graphics from being cut off during trimming

    asked by Alex
  254. Adding Fractions

    1) 2/3 + 1/8 = 19/24 I do not understand how they got 19/24 can you help me with the steps to show me how. Thank you

    asked by Rina
  255. enviro science

    what are the benefits and the negatives of dams and resevoirs? how do they affect ecosystems if at all?

    asked by kylie
  256. Chemisty!

    a flask with a volume of 267.5 mL contains a few milliliters of a volatile hydrocarbon. after vaporizing the gas at 100 degrees C, the flask is weighed and found to contain 0.728 grams of hydrocarbon vapor at 755 mmHg. a separate combustion analysis

    asked by Rachel
  257. Solo talk

    Should I do my solo talk Persuasive or discursive ( it is on wether athletes are good role models or not)

    asked by Nooblet
  258. Intro to Psychology

    Genetics and what we inherit from our biological parents play a significant role in our intelligence level. In fact, researchers have found that: adopted children are more similar in IQ to their adoptive parents than to their birth parents. identical twins

    asked by Chloe
  259. math

    what is a equivalent expression of dc?

    asked by susan marshall
  260. calculus

    y=x^3 y=8 x=0 about x-axis its using shell method i need step by step help seriously !!!!

    asked by jack
  261. physics

    explain the following,using the idea of molecules where possible : A.lakes are more likely to freeze than the sea

    asked by Anonymous
  262. computers

    What is the typical screen resolution of a computer monitor? A) 85 B) 200 C) 72 D) 100 dont want the answer, just a hint.

    asked by Alex
  263. Printing

    What are the three standard sizes of paper used in the U.S.? List the size (dimension) then the name

    asked by Alex
  264. Psychology

    An experimenter is studying how time spent on a cell phone affects people's ability to drive safely. Driving the car is the: dependent variable. coefficient of correlation. independent variable. operational condition. I think the answer is A but i am not

    asked by Chloe
  265. Chemistry

    How would the freezing point of a solution change if the unknown had ionized or dissociated? Explain.

    asked by G
  266. MGT330

    General environment – how will the forces be changing over the next three years and how will these forces impact the industry (for example, demographics – aging population)?

    asked by Daniel
  267. Psychology

    Random assignment can be described as a research method: used to balance the independent and dependent variables. no longer used because of its unpredictability. increasing the likelihood that the experimental group and control group will be different.

    asked by Chloe
  268. Health

    in class, we have to do a presentation on something health related . do you think i should talk about where babies come from ? i'm in 6th grade . thanks

    asked by Mike
  269. HISTORY101

    How did the improvement in infrastructure change the political, social, and economic landscape for the US?

    asked by Anonymous
  270. math

    Use an inequality to solve the problem. Be sure to show the inequality and all of your work. A 12-pound puppy is gaining weight at a rate of 2/3 pound per week. How much more time will it take for the puppy’s weight to exceed 37 pounds?

    asked by Anonymous
  271. stats

    if the true proportion of californians who are unemployed is 11%, what is the probability that a sample of 100 californians are unemployed?

    asked by stacy
  272. math

    The president of the country PTA organization makes copies of membership lists for all of the elementary schools. Sometimes she may need only few copies but at other times she needs thousands of copies. TIP copy Service charges 3 ½ cents per copy plus a

    asked by katherine
  273. reimbursement methodologies

    Medicare and Medicaid financial issues put constraints on? A.physicians services b.critical care c.public hospitals d. outpatient services

    asked by mary Ann
  274. math

    what is the product of (x-3) and (x-1) x^2 - 4x +3

    asked by pavleen
  275. Math (Statistics)

    I am to find the mean, variance, and standard deviation for the probability distribution. I don't even know where to start. Here is the problem x P(x) 0 0.19 1 0.32 2 0.28 3 0.21

    asked by Heather
  276. chemistry

    a flask with a volume of 267.5 mL contains a few milliliters of a volatile hydrocarbon. after vaporizing the gas at 100 degrees C, the flask is weighed and found to contain 0.728 grams of hydrocarbon vapor at 755 mmHg. a separate combustion analysis

    asked by Rachel
  277. math

    which of the following is the gcf of 4x^2y and 4x f- x^2 g-4x h-4 j-2x

    asked by pavleen
  278. science

    jake put a handful of nails in a jar he closed the jar and put the jar asidde a few weeks later the nails rusted what happen to the mass? the mass stays the same because of the law of consviation of mass i need to evidences for twomorows class can oly come

    asked by shi
  279. English

    Question on citing, I know how to cite articles and web pages but how would I come about citing what people said in an open discussion? Or rather, I want to quote someone's response on a blog. Thanks!

    asked by Bee
  280. English

    I forgot to include these other questions. I'm going to arrange them according to their topic (school, sports activities, travelling (?), clothes (?), student exchange programm, family, food). Do you think the topics are all right? 1) Do you have a report

    asked by Mike
  281. CHEMISTRY

    what happens when h3po4 is heated with zinc and hcl?

    asked by Meghna
  282. science

    what gives the plant its shape and holds it up to the sun

    asked by yuruary
  283. physics

    10. A 5 meter length of wire has a charge density of 3 x 10-3 C/m. What is the electric field strength E at an axial distance of 0.25 meters from the wire?

    asked by ikemaze
  284. homophones

    is the word days a homophone?

    asked by isabel
  285. statistics

    studies indicate that drinking water supplied by some old lead-lined city piping systems may contain harmful levels of lead. an important study of the Boston water supply system showed that the distribution of lead content readings for individual water

    asked by dinhgde
  286. maths

    Hi Can anyone help please: Suppose that the births of boys and girls can be modelled by rollling a fair die with 27 faces, 14 of which represent a boy and 13 represent a girl. 1. Using this model, choose the option that is closest to the probability that a

    asked by Claire
  287. history

    What is political centralization and decentralization? Where was the central government strong? Where was it weak? Why?

    asked by aileen
  288. Mathe/Physik

    Zwei Skifahrer, verschiedenes Gewicht (50 kg, 100 kg), gleiche Piste, wer ist schneller, welche Formel?

    asked by Max
  289. Mathe/Physik

    Zwei Skifahrer, verschiedenes Gewicht (50 kg, 100 kg), gleiche Piste, wer ist schneller, welche Formel?

    asked by Max
  290. Economics

    Indicate at which point flat-of-the-curve medicine is experienced in the following example (imagine that antibiotics have been prescribed for a given population of 1,000 elderly persons).

    asked by Donna
  291. Handling and Restraint =(Animals)

    What do i avoid doing before i open a bird's cage??? do i close all doors and windows so the bird can't escape OR do i turn on exhaust fans so the bird doesn't overheat What do i do i cant remember! plz help

    asked by Brooke & Ashland
  292. math

    (Px – 20) (100 – 2 Px + Pyg) Differentiating with respect to P we get 100 – 4Px + Pyg + 40 = 0 I don't understand how this is calc... whenever I multiply through and take the deriv I get another answer. Do you first multiply Px through then 20??

    asked by tina
  293. physics

    There is a 1500 mile race course. The max foward acceleration is 4 m/s squared and the max backward acceleration is 6 m/s squared. I start at 600m and must go to the 800m mark (I must travel 200m). What is an equation for the fastest time that I could get

    asked by hanna
  294. math

    How do you find the circumference of a circle?

    asked by Dan
  295. 4th grade math

    can u exsplain long division to me?

    asked by clinton
  296. tina

    (100 – 2Px + 1Py) (Px -20) Now, take the derivative of the above with respect to Px to get the following first order condition : 100- 4 Px + Py +40 = 0 When i try to multiply and then take the derivative of the top part out I keep getting :

    asked by econ
  297. AP government

    "if the general public benefits from entrepreneurial politics why aren't such policies fueled by a social movement or other mass form of political acitivsm?"

    asked by chrissy
  298. world history

    turning point of creation of israel

    asked by 000
  299. Marine Ecology

    what tissue do humans have that cnidarians do not?

    asked by Kaitlyn
  300. Science

    What is meant by the term "salting out" in the liquid-liquid extraction procedure?

    asked by King
  301. Further maths

    Differential calculus using product rule pls with detailed explanation (2x+3)^3(4x^2-1)^2

    asked by Stanley dominic
  302. math

    Shirley has $16,000 invested in Boeing and GE stock. The Boeing stock currently sells for $30 a share and the GE stock for $70 a share. If GE stock triples in value and Boeing stock goes up 50%, her stock will be worth $34,500. how many shares of each

    asked by anonymous
  303. english vocabulary

    Rake

    asked by Anonymous
  304. math

    from agroup of 18 kids how many ways can you choose a group of 4 to do a project

    asked by doug
  305. math

    y^3- 7y^2+ 8y -13 y=2 9

    asked by pavleen
  306. English

    Thank you very much. Here are some more questions I need you to check. Choose the topics on the basis of your own preferences and then interview your American twinned students. Write their answers on the sheet provided by your teacher. Be prepared to be

    asked by Mike
  307. Economics

    can anyone tell me what are the current major economical topics. i have to a letter in economics class but i don't know what topic to write on thanks in advance

    asked by Anonymous
  308. calculus

    What is the derivative of y=x^2*e^x

    asked by Anonymous
  309. Math

    Find the smallest possible sum of six consecutive integers such that none of the integers is prime.

    asked by Diana
  310. math

    Laura’s favorite clothes are five sweaters, four skirts, three jackets, two pairs of shoes and one belt. How many ways can Laura wear her favorite clothes without repeating the exact outfit?

    asked by anomyous
  311. chemistry

    briefly describe the process of volumetric analysis

    asked by klar
  312. geometry

    if lines M and N are parallel, and the measure of angle 8 is 20degress, what is the measure of angle 3?

    asked by Britany
  313. statistic

    what should i know in topic hypothesis testing?

    asked by alya
  314. math

    to allow for more dancers the country club can increase the dimensions of the dance floor in 5 foot increments in either direction; however, the committee would like to maintaine a square shape.

    asked by kylie
  315. Chemistry

    if 225 mLs of .50 molars of hydrofloric (HF) acid solution is reacted with 25.5 grams of solid zinc what is the most (in grams) aqueous zinc flouride that would be produced? Based on this, how much nonlimiting ractants will be left over?

    asked by Nicole
  316. English

    I forgot to include these other sentences. I hope you can check them, too as I need them for tomorrow. 1) This obviously represents the secret and evil side of nature. Hyde is only ever seen here, never at the front of the house. 2) Furthermore, the most

    asked by Franco
  317. science

    a mass of 0.2 kg is whirled at 12 revolutions in 2 sec in a horizontal circle at the end of o string0.8m long.(a)angular velocity (b)linear velocity (c) central acceleration (d) central force

    asked by Anonymous
  318. science

    a mass of 0.2 kg is whirled at 12 revolutions in 2 sec in a horizontal circle at the end of o string0.8m long.(a)angular velocity (b)linear velocity (c) central acceleration (d) central force

    asked by jhay
  319. English

    Cueca is a folk dance of Chile. (How do you pronounce "Cueca" in English?)

    asked by rfvv
  320. geometry

    Given two triangles, ABC and GHI, with A = 60°, H = 75, C = 45° and I = 60°, which statement is true?

    asked by Anonymous
  321. Physical science

    (A) A red light source and a green light source shine on a white screen. What color will the screen be? Explain your answer (B) if a blue object is aced in front of the screen, what color will it be? Explain your answer

    asked by Aj
  322. fractions

    if there are 648 meters vertically and 4/8 by 6 meters horizontally. how do i solve the problem?

    asked by brandon
  323. Math

    What is the best way to solve the following problems: Sam's family eats 4 to 6 apples every day. Which is a reasonable number of days that it will take Sam's family to eat a bag of 20 apples? Terry's party started at 6:30 p.m. and ended at 9:00 p.m. What

    asked by Mattie
  324. English

    I need to quote a sentence but need to take out one word to make it make sense in my paper, how do i go about doing this

    asked by Anonymous
  325. chemistry

    If the vapor pressure of phosphorous trichloride gas above the liquid were 0.085 atm at 303K, would you expect the reaction to proceed towards more evaporation, or would you expect condensation of gas into liquid? Why?

    asked by zfaz
  326. English

    Are these last two senteces correct Do you have to take a make-up exam if you fail a subject in June' Do you know what festivity is celebrated on next 16 MArch in Italy It has been 150 since the Italian republic was founded.

    asked by Mike
  327. math

    8 pints is how many quarts ?

    asked by Liaa
  328. Finance

    The venture capital fund Techno Fund II made a $4 million investment in Optical Fibers Corporation five years ago and in return received 1 million shares representing 20 percent of Optical Fibers’ equity. Optical Fibers is now planning an initial public

    asked by MOMO
  329. Physics

    If a box is being pulled up a hill at an angle to find work, its W=Fdcos(angle) If a hiker is walking up a hill, the work done is W=mgh right? When do you know when you can use what formula?

    asked by John
  330. Socials

    Confederation: For and against.. In a chart, list Joseph Hows's points against Confederation in one column, and Macdonald's points in favour of Confederation in another. This is what Joseph Howe said: Let us see what the Canadians desiere to do. They are

    asked by Sara
  331. Chemistry

    What do I need from the data i collected from my experiment to get... moles of CaC2O4xH2o (or CaC2O4) percipitated (mol)

    asked by Dana
  332. nonfiction

    when does the narrative of sojourner truth take place

    asked by anita
  333. social studies

    what might happen if people didn't pay their taxes? why would this be a problem?

    asked by alexander- very important!!!
  334. earth science

    how does the apparent diameter of the sun from earth affect the orbital velocity?

    asked by k
  335. english

    is it ok to end a paragraph with a quote

    asked by Anonymous
  336. Algebra

    Find the area of a rectangle heating-duct grill having a length of 2yd and a width of 17/4yd

    asked by Tammy
  337. Calculus

    the height of an object thrown on the surface of a certin planet is s(t)=80t-16t^2. what is the velocity? what is the acceleration? when is the velocity zero?

    asked by Andrea
  338. math !!!! :O

    The cost of making money varies form coin to coin: Pennies: 0.8 cents each Nickels: 2.9 cents each Dimes: 1.7 cents each Quarter: 3.7 cents each Half dollars: 7.8 cents each What is the cost of making $5.00 worth of each coin?

    asked by Iliana
  339. prealgebra

    what is 0.3m+2.4=0.1m+4

    asked by Amber shall
  340. Socials

    John. A Macdonald for Confederation... For 20 long years, I have been dragging myself through the dreary waste of Colonial politics. I thought there was no end, nothing worthy of ambition; but now I see something which is well worthy of all I have suffered

    asked by Sara
  341. prealgebra

    what is 0.3m+2.4=0.1m+4

    asked by Amber shall
  342. Algebra

    #1 2/11 + (-5/7)

    asked by Tammy
  343. chemistry

    With a half-life of 14.3 years, how long will it take for100 g of phosphorus32 to decay to 12.5 mg?

    asked by thomas
  344. Psychology

    The sentences, "Lee gave the ball to Lynne" and "Lynne received the ball from Lee," have the same: surface structure. syntax. surface and deep structures. deep structure. I am going for C Not Sure

    asked by Chloe
  345. physics

    when can an object have its original mass but zero weight?

    asked by sarah
  346. science

    When can an object be considered weightless but still have a gravitational force on it?

    asked by sarah
  347. college math

    Find the approximate (with an integral estimate) present and future values of a constant income stream of 2500 dollars per year over a period of 40 years, assume a 5 percent annual interest rate compounded continuously. Find current and future value?

    asked by aj
  348. math

    The president of the country PTA organization makes copies of membership lists for all of the elementary schools. Sometimes she may need only few copies but at other times she needs thousands of copies. TIP copy Service charges 3 ½ cents per copy plus a

    asked by Karen