1. Archives
  2. 2011
  3. March

Questions Asked on
March 8, 2011

  1. math

    0.567km= meters

    asked by Linda

  2. statistics math

    MEAN ƒÊ=10 & STANDARD DEVIATION ƒÐ=2. FIND THE PROBABILITIES: 9.4 Ú X Ú 10.6 i have 2 different answers but am checking the answer. thank you one is 0.6179 the other is 0.2358

    asked by Jeannie

  3. physics

    A bridge of lenght 79 m and mass 1.1 x10^5 kg is supported at each end. A truck fo mass 20900 kg is located 31 m from the left end. What is the force on the bridge at the left point of support?

    asked by Anonymous

  4. math

    An electronics store receives a shipment of 20 graphing calculators, including 3 that are defective. Four of the calculators are selected to be sent to a local high school. A. How many selection can be made using the originial shipment?

    asked by cheri

  5. Physics, error derivation

    I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've never had to derive

    asked by trace

  7. chemistry

    1. Would Ch3-OH or CH3-CH2-CH2-CH2-CH2-OH have a higher boiling point? Fully explain ypur answer. 2. Explain why a tertiary alcohol will not undergo an oxidation reaction. Give an example. 3. Compare and contyrast similarities/differences of condensation

    asked by nusratara

  8. Geometry

    abcd is parallelogram. abde is a kite, ad= 18 cm and be = 10cm. find abcde thanks :)

    asked by Skye

  9. Chemistry

    I want to see if i got my answer correct for #1 but I need help on #2 1.A 150g aluminum pan containing 500g of water is heated on a stove for 5 minutes. The temperature goes from 23.5C to 48.9C. How much heat was absorbed. (s for Al is .900j/g C, s for H2O

    asked by Ashley

  10. Algebra

    six people can paint a house in 3 days, how long it would take two people to paint it?

    asked by Leilah

  11. Organic Chemistry

    If fructose, glucose, and sucrose are the only carbohydrates in honey, how could you use Benedict's reagent to determine the number of moles of sucrose in a 1.0g sample of honey?

    asked by Sophia

  12. FIU

    (1)You are preparing a budget for the month of January and are trying to estimate maintenance cost for the month. The maintenance cost is an overhead cost that is categorized as being mixed – that is it has both a fixed and a variable component. To

    asked by omar brown

  13. calculus

    Consider the solid obtained by rotating the region bounded by the given curves about the x-axis. y = 9 - 9x^2 , y = 0 Find the volume V of this solid. Sketch the region, the solid, and a typical disk or washer. Any help or tips would be greatly

    asked by Tina

  14. History (writing)

    My college instructor is asking me to define and discuss one of the themes the entire class read about for homework. I've chosen to do a paper on Americanization of the Mexican American woman. However I don't understand how I should define and discuss the

    asked by Rei

  15. Penn Foster

    I am looking for the questions to these exams..all I keep getting are the darn answers...I want to compare my answers before I submitt anyone have the orginal questions? to these Anyone have the questions for the penn foster exams with the answers that go

    asked by Jessie

  16. statistics

    find the z score corresponding to a score of X = 100 for a mean = 80 and standard devation of 10

    asked by karen

  18. math z score

    find the z score corrsponding to a score of X = 100 the mean = 80 and the standard devation = 5

    asked by karen

  19. chemistry

    1) a 100ml smaple of 0.18M HCLO4 is titrated with 0.27M LiOH. determine the ph of the soution after the addition of 66.67 ml of LiOH (this is at equivalence point) 2)a 100 ml sample of .20M HF is titrated with .10M KOH. determine th ph of the soution

    asked by lia

  20. quantitative

    how long will it take a sum of money to tripple itself at 16%p.a simple interest

    asked by caroline

  21. Chemistry

    The Concentration of Cu2+ ions in the water (which also contains sulfate ions) discharged from a certain industrial plant is determined by adding excess sodium sulfide(Na2S) solution to .800 L of the water. Molecular Equation: Na2S(aq) CuSO4(aq) -->

    asked by Monty

  22. Algebra

    a laptop charges up by 15 % every 20 minutes. How much charged will be after two hours?

    asked by leana

  23. geometry

    The length of a box is 4 inches longer than its width, and the height is 2 inches shorter than the width. Which equation can you use to solve for the length of the box if the volume is 240 cubic inches? (Assume that the width of the box is x.)

    asked by Anonymous

  24. Chemistry

    What volume of a .500 M HCl solution is needed to neutralize each of the following: 10 ml of a .300 M NaOH solution 10 mL of a .200 M Ba(OH)2 solution

    asked by Monty

  25. physics

    A spring gun is made by compressing a spring (assumed to be perfect) and latching it. A spring of constant k = 60 N/ m is used and the latch is located at a distance of 7 cm from equilibrium. The pellets have mass 4 g. What is the muzzle velocity of the

    asked by Nazgul

  26. physics

    What is the difference between the second and third Newton’s Laws?

    asked by Nazgul

  27. spanish

    i need to give commands to fix the following sentences: 1.El perro tiene hambre 2.hay mucha basura en la cocina 3.los platos,la alformba y el coche estan sucios,yhay polvo en las mesas.

    asked by lou

  29. physics

    Solid and hollow cylinders both roll from rest down an inclined plane. Explain the difference in speeds at the bottom.

    asked by Nazgul

  30. physics

    The buoyancy force on the 490 balloon is F = 6kN , and the air resistance is F_D = (100v)N, where is in m/s. Determine the terminal or maximum velocity of the balloon if it starts from rest. vmax = ?

    asked by Roshni

  31. English

    I forgot to include these 5 statements I still have doubts about. Thank you. 1) Since George Orwell was a child, he developed an independent-minded personality and then he professed (?) atheism and socialism. 2) He didn't accept the strict discipline

    asked by Mike

  32. English - Native speakers

    Hello once again! Can you tell me the difference between Don't underestimate me! and Don't underrate me! Which one is more used in English and what's the difference between those two words? Is there any other similar word? My second question. Can we say

    asked by Mark

  33. Chemistry

    Hi, please can someone tell me if this is the right number of significant figures. 8.1 x 10 to the power of -3 would have 2 sig fig 910 would have 3 175.0 would have 3 please can some tell me if I've got this right Also how would I report each of the

    asked by Ally

  34. maths

    Need help to know what to do: solve the equation 9/(x=7)=4/(x-3) My book tells me to cross multiply, then move all the terms in x and the terms without x on separate sides of the equation. then divide by the coefficient of x. How do i do this? I don't

    asked by Jane

  35. English

    1. I am a freshman in high school. 2. I am a freshman of high school. (Which preposition should we use? Are both OK?) 3. There'll be a parade on the anniversary day. (How do you pronounce "There'll"?) 4. We'll choose between upper secondary school and

    asked by rfvv

  36. SOCIOLOGY

    HOW CAN THE CONCEPT OF STRUCTURATION HELP US TO UNDERSTAND BETTER THE CHALLENGES FACED BY MAMARRANDI?

    asked by NOBUBELO

  37. English

    1. I'm in the third year of middle school. 2. I'm in the third year in middle school. (Which preposition do we have to use?) 3. My school is a boys-only school. 4. My school is a boys' school. 5. My school is girls-only school. 6. My school is a girls'

    asked by rfvv

  38. maths

    Expand the brackets in the following expression (5y-3)^2 My answer is 5y^2-3^2 The answer i worked out seems to simple but is it correct? If not can someone tell me what i need to do. thanks

    asked by susan

  40. maths

    Facrt

    asked by jane

  41. math

    The maximum, range of a projectile is directly proportional to the square of its velocity. A baseball pitcher throws a ball at 60 mph, with a maximum range of 242 ft. What is his maximum range if he throws the ball at 70 mph?

    asked by Jeromino

  42. algebra

    Factorise the expressions 9y^2-25 x^2-x-12 I'm totally stuck!

    asked by Marian

  43. science

    50 mL 3.0 M HCl(aq) that means hw much HCl i have to add

    asked by Tumpa

  44. science

    50 mL 3.0 M HCl(aq) that means hw much HCl . Can anybody ilaborate it

    asked by Tumpa

  45. algebra

    What is the scientific notation for 0.000128?

    asked by Danielle

  46. SCIENCE(CHEM101)

    iF 23.74Ml OF 0.01470m nAoh are required to completely neutrize 25.00mL of gastric juice,calculate the concentration of the hydrochloric acid(in g/L )in the stomach gastric juice.show steps and calculations

    asked by MAHLATSE

  47. Physics

    after the infant's push, but before the box came to a stop, the box accelerated at a rate of 2 m/s^2. what was the coefficient of kinetic friction between the box and the floor during its motion?

    asked by mary

  48. chem 101

    show calculations of the previous problem

    asked by MAHLATSE

  49. chemistry

    Determine the concentration at equilibrium if you start with 2.3 grams of Hydrogen and 200grams of Iodine in a 2.3 liter container. If you now add an extra .25M of HI after equilibrium, calculate Qc. Recalculate now what the concentrations should be at

    asked by regina

  51. arithmetic

    an arithmetic progression has 20 terms. the sum of all the even terms is 350. given that the first term is 5, find the common difference and the eleventh term.

    asked by rusya

  52. CHEMISTRY

    How much heat is needed to melt 150g of ice? and How much heat is needed to change 150g of ice into steam at 110 degrees? My heat of fusion is 361 and my percent error is 8 if you need that. Answers quickly please :(

    asked by TaShe

  53. social studies

    How did the existence of slavery affect the development of the Articles and Constitutional governments?

    asked by Mia

  54. General Chemistry

    I did a lab on The Decomposition of Potassium Chlorate and I'm confused how to the vapor pressure of water in mmHg?

    asked by Anonymous

  55. Calculus II

    Consider the solid obtained by rotating the region bounded by the given curves about the y-axis. y = ln x, y = 4, y = 5, x = 0 Find the volume V of this solid. Help!!! Thank you in advance :(

    asked by Sarah

  56. grammar

    Linda Robbins worked in our payroll Department last summer.

    asked by Angela

  57. Biology

    imaginary population of fruit doves, Half had purple head feathers and half had green head feathers. Describe how natural selection could act upon this population. What change might you see over time? (really need help with this, looked in my textbook i

    asked by :DD

  58. Food Analysis

    1.If 0.5l of 5M solution of CU(NO3) is diluted to a volume of 0.80l by adding water, what is the molarity of the resulting diluted solution? 2.How many ml of water will be required to dilute 11ml of 0.45Macid solution to a molarity of 0.1M? 3.Calculate the

    asked by Sarah

  59. Chem

    I want to see if i got my answer correct for #1 but I need help on #2 1.A 150g aluminum pan containing 500g of water is heated on a stove for 5 minutes. The temperature goes from 23.5C to 48.9C. How much heat was absorbed. (s for Al is .900j/g C, s for H2O

    asked by Ashley

  60. geometry

    An isosceles trapezoid has base angles equal to 45 and bases of lengths 6 and 12. Find the area of the trapezoid.

    asked by john

  62. Calculus

    1. Find the slope m and an equation of the tangent line to the graph of the function f a the point (2, 38) f(x)=9x -2x +6

    asked by Anonymous

  63. chemistry

    if you have 1000g of a substance at -20 degrees celsius with a specific heat of .110 c/1 degree celsius and you add 12 kilojoules to it what is the resulting temperature?

    asked by carla

  64. english garmmar

    please help me if this correct answer or grmmar question below. what is your purpose to visit to canada and provide your itenerary. my answer. i am going to canada for work since i have an employer for 2 years contract working. 2.what other country you

    asked by jessie

  65. Calculus

    tan 0=1 csc 0 = sqrt. 2 cos 0 = sin 0 os 0 = cos (-pie/6) The 0s means that symbol for angle. Please someone help me do these problems.

    asked by Eva

  66. sanskrit

    aneshyam

    asked by anonymous

  67. Algebra

    six people can paint a house in 3 days, how long it would take two people to paint it? I should show steps. It is related to rte of work.

    asked by Leilah

  68. Managerial Economics

    A)Who has more monopoly power---Wal-Mart or the concessionaire who has acquired the franchise to sell beer, hot dogs, colas, candy, etc., at a Washington Redskins football game? Explain. B)Who has more monopsony power---Wal-Mart or teams in the National

    asked by Tasha

  69. Spanish-8th Grade-Please check

    I have a question about the owrd cubiertos in Spanish. Does ths word include la servillete el cuchillo el vaso la cuchara el tendor OR is it just like the plate and spoon, fork, knife and NOT the vaso or servillete(napkin)? The word and transaltion is

    asked by Rachel

  70. sanskrit

    meaning of aneshyaami

    asked by anonymous

  71. algebra

    Factor polynomial completely: 9y^2 - 25yz -6z2

    asked by Bob

  73. English

    Complete the sentences by putting the verb in brackets into the Past Simple or Past Progressive. 1. I saw a light in your window as I ___________________ (pass) by. 2. The student ________________ (answer) the question when the headmistress came in. 3.

    asked by Nazgul

  74. English

    Read the following passage and choose where to insert these sentences. a) Magazines such as Fortune and Business Week were all mocking him. b) But it is true that Jobs was still losing money. In the early 1990s he was going c) Pixar Animation Inc. Was also

    asked by Nazgul

  75. Spanish-9th grade

    I have a question-I'm not sure of this translation: ¿Qué comes parea a uno? Does this mean What do you stop to eat at one or Where? I'm stuck on this one. Thanks you

    asked by SammyLynne

  76. trig

    A surveillance satellite circles the earth at a hight of h miles above the surface. Suppose that d is the distance, in miles, on the surface of the earth that can be observed from the satellite. find an equation that relates to central angel (theta) to the

    asked by Charles

  77. Quote Question

    What are some really good quotes about the Latin American Revolution? Thanks -Allyson

    asked by Allyson

  78. religion

    a muslim traveler

    asked by mohamed

  79. math

    how do u find the volume of a prism,when each side 12?

    asked by danny

  80. Chemistry

    S2O82-(aq) + 2I-(aq) ----------> 2SO42-(aq) + I2(aq) (I) Rate = k [S2O82-]x [I-]y Rate1 = k [S2O82-]x [I-]y ƒ´ [S2O82ƒ{] Rate = ƒ{ƒn ------------- ƒ´ƒnt Experiment data Experiment: 0.20M NaI,0.20M NaCl, 0.010M Na2S2O3,2% Starch,0.20M K2SO4, 0.20 M

    asked by Jude

  81. english

    recommendation

    asked by marie

  82. financial accounting

    I am having trouble figuring out my accounts payable and capital. Any help on going about and solving this would be greatly appreciated. I have listed the data below... Travis Fortney, an architect, opened an office on April 1, 2010. During the month, he

    asked by Anonymous

  84. english

    rosaq was nervous around the large dog whose moods were easily changable

    asked by marie

  85. english grammar

    class vii analogies

    asked by anonymous

  86. chemistry

    ammonia (NH3) chemically reacts with oxygen gas (O2) to produce nitric oxide (NO) and water (H2O). What mass of water is produced by the reaction of 1.09g of oxygen gas?

    asked by Mal

  87. MATH

    HOW DO YOU SOLVE A PI PI R STEP BY STEP?

    asked by HAVEN

  88. English

    Read the passage below and complete it with the verbs in Past Simple from the box. _____________________________________ create,take,test, offer,be, publish,come out,have , give, find; _____________________________________ The PostScript language was

    asked by Nazgul

  89. Mathematics

    Determine the shortest distance from a house situated at the origin to a road that is represented by the line 3y+x+18=0

    asked by Mokotedi

  90. Spanish-Please check my work

    Please check if I answered these correctly-Thank you ¿Tienes hambre? Si, tengo hambre. ¿Tienes sed? Si, tengo sed. ¿La manzana es una carne? No, la manzana es una verdura. ¿Qué comes para el desayuno? Yo como el cereal con leche. ¿Prefieres el

    asked by SammyLynne

  91. wxmaxima help math mate!

    one expression is y=log(-100493/40000)x the x is next to the (-100493/40000) same with the other expression y=atan(-100493/40000)x, y=exp(100493/40000x) approximate the region bounded by the given curves. be sure to specify a range of x and y that results

    asked by jessica

  92. Algebra

    Donna runs 4 miles in 30 minutes. How many miles can she run in 63 minutes?

    asked by Olivia

  93. stats-please help

    MEAN=10 & STD DEVIATION=2. FIND THE PROBABILITIES: 9.4 less than X less than 10.6? i have 2 different answers but am checking the answer. thank you

    asked by jean

  95. math

    Find the present value of $9000 due at the end of 18 years at 11% per annum compounded quaterly????

    asked by Alex

  96. ap history

    why did the cartoonist use "$" instead of "s" for senate?

    asked by alena

  97. Math/Algebra

    y^2-4y-12=0 Please help. :)

    asked by Jessica

  98. math

    Use each of the numbers 1 through 9 once in any order that you want to make and expression 2011

    asked by vicki

  99. optimization calculus

    a net enclosurefor practisinggolf shots is open at one end, as shown, find the dimensions that will minimize the amount of netting needed and give a volume of 144 m^3(netting is required only the sides, the top, the far end.)

    asked by Anonymous

  100. college

    c= 1/2 f(s+k) solve for S S= 2C/f -k is this correct?

    asked by tonya

  101. ap u.s history

    how could the trusts purchase a senate seat?

    asked by alena

  102. Calculus AB

    Consider the region trapped between the graphs of y=9-x^2 and y=11-3x. a) find the area of this region b) set up an integral which computes the volume of the solid of rotation obtained by rotating this region about the x-axis c) set up an integral which

    asked by Nellie

  103. Calculus AB

    Consider the region bounded by the graphs of the equations x=y^2 and y=3x. Set up 2 integrals, one with respect to x and the other with respect to y, both of which compute the volume of the solid obtained by rotating this region about the x-axis and

    asked by Nellie

  104. Geometry

    I find these questions so difficult! I've been trying to solve them but I just can't. As they are diagrams they are hard to express in words, so the questions are the links below: 1) tinypic(.)com/r/25z7486/7 2) tinypic(.)com/r/4uhrg3/7 3)

    asked by Ray

  106. to Nazgul

    You have posted the same thing, time after time this morning, and you've received the same response from several people here: You need to post what YOU THINK the answers are, and then someone will be able to help you.

    asked by Writeacher

  107. chemistry

    25.0 cm3 of an acidified solution containing Fe2+ ions was titrated against potassium manganate (VII) solution. 20.0cm3 of 0.050M potassium manganate (VII) was needed. Calculate the concentration of Fe2+ ions in the acidified solution.

    asked by tam

  108. Chemistry

    Reposting since it wasn't clear in the previous post S2O82-(aq) + 2I-(aq) ----------> 2SO42-(aq) + I2(aq) (I) Rate = k [S2O82-]x [I-]y Rate1 = k [S2O82-]x [I-]y Experiment data Experiment: 0.20M NaI,0.20M NaCl, 0.010M Na2S2O3,2% Starch,0.20M K2SO4, 0.20 M

    asked by Jude

  109. English

    I have a report to do on ways people tried to live forever. can anyone help me find info for this.

    asked by Michael

  110. Math

    today Thomas deposited $100,000 in a three-year,12% CD that compounds quartly. What is the maturity value of the CD?

    asked by Bobbi Loffredo

  111. Chemistry

    Rank the following in order by increasing boiling point and explain why? CH3Cl Rn CH4 CH3-CH2-OH

    asked by MMPM

  112. Physics

    A bus starts from rest at a bus stop and accelerates at a rate of 1.12 m/s^2 for 11.0s. It runs at constant speed for 80.0 s and slows at a rate 1.20 m/s^2 until it stops at the next bus stop. (a) What is the maximum speed attained. (b) Find the total

    asked by Paul

  113. Algebra

    I have a question I have this systems to solve 2x-y = 1 3x-3=y How do I go about solving this? Please give me some direction

    asked by Jessie

  114. history

    the social, economic, and political composition of the decade of corporate greed and how it affected the political climate of the 1980s.

    asked by tonia

  115. math

    In math class, students must randomly draw a card that contains an equation that they must graph on the board. If the cards contain the equations 2y = 4x + 2, x(x + 1) = 0, 2x + y = 0, x = 2y , x2 + 1 = 0, and y - 2x = 0, then what is the probability that

    asked by MELISSA

  117. BUSINESS LAW

    In the video game Corporate Cowboy, your task is to investigate complaints of wrongdoing on the part of corporate directors and officers, decide whether there is a violation of the law, and deal with the wrongdoers accordingly. Jane, a shareholder of

    asked by Marie

  118. Ethics

    What are some advantages and disadvantage for a Christian following conscience rather than scripture.

    asked by Anique

  119. algebra

    A standard die is rolled 10 times, with the outcomes {2, 4, 1, 3, 4, 2, 5, 2, 5, 1} (in this order). You can conclude _____.

    asked by Anonymous

  120. PHYSICS

    A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

    asked by DMITRIC

  121. physics

    How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 2 106 m/s?

    asked by Tiniyah

  122. Biology

    You find an unusual organism growing on the bark of a dying tree. Under a microscope, you observe that its cells are eukaryotic, have cell walls, and do not contain chloroplasts. Into what kingdom would you classify this organism? Explain your decision.

    asked by Tara

  123. chemistry

    calculate the volume in milliliters of 3.6 mol/L sodium nitrate solution that contains 325 mmol of sodium nitrate

    asked by Mal

  124. English

    The internal struggle of Macbeth's that forms a central conflict of this play is: A. his cowardliness and his wife's bravery B. his loyalty to Duncan and his ambition to be king. C. his hatred for Duncan and his desire to be kind. D. both A and B I'm

    asked by anthony

  125. English

    Help! In Ian Frazier's essay How to Operate the Shower Curtain, what problems are users likely to encounter in using the shower curtain?

    asked by Jay

  126. Chemistry-please help

    What is the purpose of adding zinc chloride in the preparation of starch iodide paste? Please refer to the procedure below: - Starch Iodide Paste- Heat 100mL of water in a 250mL beaker to boiling, add a solution of 0.75g of potassium iodide in 5mL of

    asked by Jan

  128. geometry

    What is the area of the sector, in square units, determined by an arc with a measure 45° in a circle with radius 6? Round to the nearest tenth.

    asked by Anonymous

  129. 2nd grade/math

    How do you find the perimeter of a letter, example I, U, and J? The area for the I is 9 square cm. Do you still count all the sides or what? Any help would be appreciated!

    asked by Jennifer

  130. stats-please help

    repost MEAN=10 & STANDARD DEVIATION =2. FIND THE PROBABILITIES: 9.4 less than X less than 10.6 i have 2 different answers but am checking the answer. thank you one is 0.6179 the other is 0.2358

    asked by jean

  131. Math

    How do I solve this 120-42÷ (10*4-4*6) Can you explain

    asked by Donna

  132. English

    I am between two different thesis statements for Frazier either it is where the writing becomes italicized, "Remember to keep shower curtain inside tub at all times!" Or In the last paragraph from Operating the shower curtain is kind of tricky to there is

    asked by Jay

  133. physics

    An object is dropped from a platform 400 ft high. Ignoring wind resistance, how long will it take to reach the ground?

    asked by bere

  134. algebra

    Consider that the age, x, of a unicorn in human equivalent years can be given by the formula f(x) = - 0.001518x4 + 0.067326x3 – 1.4367x2 + 12.46x + 2.914. When a unicorn is 2.5 years old, what is its age in human equivalent years? What about when it is

    asked by Jackster

  135. HSM 220

    what are thre ways human resources help support the strategic goals of human service organizations?

    asked by timothy

  136. Chemistry

    how much sulfur dioxide is needed to decrease the pH of 1L of water from 9.8 to 8.0?

    asked by lisa

  137. algebra

    write an equation for the line parallel to the x axis through the point 7,2

    asked by kim

  139. English

    An example of verbal irony is: A. Macbeth saying, "O, yet I do repent for my fury, that I did kill them." B. Macduff referring to Lady MacBeth as "O gentle Lady." C. Macduff saying "O horror, horror, horror." D. the witches saying, "fair is foul and foul

    asked by anthony

  140. algebra

    i don't get this ok it says suppoes the discount is only 1 percent .what total discount amount would mr.fernandes receive on the 15 CDs

    asked by nacolie

  141. physics

    In a lab experiment, a 1.5-kg cart traveling at 4.3 m/s in the +x direction collides with a 2.5-kg cart traveling at 2.7 m/s in the -x direction. After the collision, you find that the 2.5-kg cart is traveling at 1.9 m/s in the +x direction. How fast and

    asked by nic

  142. physics

    A net force of 1.6×10−15 N acts on an electron over a displacement of 5.0 cm, in the same direction as the net force. (a) What is the change in kinetic energy of the electron in joules? (b) If the electron was initially at rest, what is the speed of the

    asked by jamaisa

  143. physics

    A proton is moving at 425 m/s. (a) How much work must be done on it to stop it?(answer in joules) (A proton has a mass of 1.67×10−27 kg.) (b) Assume the net braking force acting on it has magnitude 8.01×10−16 N and is directed opposite to its initial

    asked by jamaisa

  144. math

    how to explain this and solve this equation Y=5x2-10x+9

    asked by josy

  145. physics

    A small domestic elevator has a mass of 454 kg and can ascend at a rate of 0.180 m/s. What is the average power that must be supplied for the elevator to move at this rate ? answer in watts.

    asked by sabeen

  146. us history

    how did the events at chickamauga and chatanooga affect georgians

    asked by shannon

  147. Chem

    What volume of 0.0500 M Ba(OH)2 will react completely with 29.50 mL of 0.350 M HCl?

    asked by Jawa

  148. Chem

    What volume of 0.0500 M Ba(OH)2 will react completely with 29.50 mL of 0.350 M HCl?

    asked by Jawa

  150. physics

    What is the acceleration of two falling sky divers (mass 107.0 kg including parachute) when the upward force of air resistance is equal to one-fourth of their weight?

    asked by Anonymous

  151. Math

    Find a set of six whole numbers that have a mean, a median, and a mode of 50. The numbers cannot all be the same.

    asked by Ky

  152. math

    a student has two test scores in a psychology class. The mean of these scores is 76 and their range is 28. Use this information to determine the two scores. ( write a system of linear equations to solve the problem)

    asked by tawnie

  153. physics

    Two sound sources radiating in phase at a fre- quency of 540 Hz interfere such that maxima are heard at angles of 0◦ and 21◦ from a line perpendicular to that joining the two sources.

    asked by Anonymous

  154. english

    how to write a good thesis for a research paper?

    asked by soksan

  155. english

    what is the appositive inthis sentences Charles Lutwidge Dodson is better known by his pen name,Lewis Carroll.

    asked by jessy

  156. 5th grade math

    3m=63

    asked by casey

  157. PSYCHOLOY

    CONTRAST TWO THEORIES OR PERSPECTIVES FROM LATE STAGE ADULT DEVELOPMENT

    asked by ANGIE

  158. MAth

    how many degrees does the minute hand move from 4:00 to 4:30?

    asked by Kristiana

  159. Math

    x/(x^2-16)-6/(x^2+5x+4)

    asked by Jake

  161. english

    what are words that have the same beginning sound as cushion has?

    asked by alexander- very important!!!

  162. Physics

    n an auto accident, a car hit a pedestrian and the driver then slammed on the brakes to stop the car. During the subsequent trial, the driver's lawyer claimed that the driver was obeying the posted 35.0 mph speed limit, but that the limit was too high to

    asked by Ana

  163. Geography

    What three countries are north of Mexico and considered to be part of North America?

    asked by Maeghan

  164. Math

    If glenda rolled two six-sided number cubes nine times and computed the sum of the numbers rolled each time. If the mean sum of Glenda's rolls was 6 what was the total of the nine sums Glenda rolled? Suppose Glenda's rolls were 12,7,3,10,9, 2, 11, 7 and 8.

    asked by Matt

  165. math HELP!!

    Are the following simplified fractions? 1.1/2 2.1/5 3.2/3 4.5/6 5.3/4 6.4/8,1/2

    asked by liz

  166. Math-CHECK PLEASE

    Which of the statements is ALWAYS TRUE? A-A right triangle is a scalene triangle. B-An equilateral triangle is an isosceles triangle. C-An isosceles triangle is an obtuse triangle. D-A right triangle is an acute triangle. I got either A or D. I don't know.

    asked by Catherine

  167. English

    Can you please check if these sentences are OK? Thank you. 1)Forensic science adopts different scientific methods to catch criminals. 2)In particular, scientists can examine a suspect’s fingerprints or check blood type. 3) They can also check teeth and

    asked by Mike

  168. English

    I forgot to include the following sentences. Thank you. 1) Forensic artists are also essential to catch criminals. They are required to possess two skills. 2) First, they need to have good interview skills as they have to talk to victims and listen to

    asked by Mike

  169. ENGLISH

    What are words with the ending shion except cushion and fashion?

    asked by Phillip

  170. math

    what is 34 multiply 56?

    asked by Phillip

  172. Math

    a plane flies due north at 300 mi/h for 3 h then due west at 250 mi/h. If x represents the number of hours the plane is flying due west, determine for what values of x the plane will be more than 3700 mi from it's original point.

    asked by Rob

  173. Scocial Studies

    Who was the leader of China during WW2?

    asked by Lisa

  174. chemistry

    number of moles of Cl in 2.7 mol CaCl2

    asked by Anonymous

  175. math

    what is 200000 times 56 =?

    asked by sammi

  176. Math degrees

    how many degrees does the hour hand move in 2 hours

    asked by Kristiana

  177. Math

    I have to define function. Would it be a set of possible input values? Not sure if I worded it correct.

    asked by Cindy

  178. Math

    I have to explain the vertical line test and how it is used.

    asked by Tammie

  179. MATH

    CALCULATE THE AREA FOR THE FIGURE WITH SIDES 9YDS 6YDS 6YDS 6YDS 3YDS 12YDS

    asked by RJ

  180. Algebra

    Explain how to use a graph to determine the number of solutions of a system?

    asked by Mary

  181. Economics

    List the various causes of inflation and determine if they are an injection or a leakage. Demand-pull theory: This is a leakage. If all sectors in the economy try to buy more than the economy can produce, people may start to rely on imports. Therefore,

    asked by David

  183. math

    how can you use the multiplication facts for 3 to help you find the multiplication facts for 9

    asked by esha

  184. geometry

    IF THE RADIUS OF THE SPHERE IS 26 UNITS AND THE RADIUS OF POINT R IS 26 UNITS FIND CR.

    asked by Anonymous

  185. Spanish-Please check my answers

    Please check if I answered these correctly-Thank you I forgot to put accent on "i" in Si and I use spanishtypeit not manually on the keyboard-Please excuse lack of accent ¿Tienes hambre? Si, tengo hambre. ¿Tienes sed? Si, tengo sed. ¿La manzana es una

    asked by SammyLynne

  186. physics

    Rank these automobiles based on the magnitude of the impulse needed to stop them, from largest to smallest. 2000 kg car going 5m/s 500 kg car going 20 m/s 1000 kg car going20m/s 500 kg car going10m/s 1000 kg car going10/s 4000 kg car going 5m/s

    asked by Diana

  187. physics : different question

    Rank the automobiles based on the magnitude of the force needed to stop them, from largest to smallest. 2000 kg car going 5m/s 500 kg car going 20 m/s 1000 kg car going20m/s 500 kg car going10m/s 1000 kg car going10/s 4000 kg car going 5m/s

    asked by Diana

  188. Physics-Please check

    Do charged particles always experience equal but opposite electrical forces? My answer is The electric forces are directly porportional to the quantity of the charge on the objects. Is that correct-we just started learning this and I'm trying to answer

    asked by Rachel B.

  189. Physics

    In principle, anytime someone jumps up, the earth moves in the opposite direction. To see why we are unaware of this motion, calculate the recoil speed of the earth when a 65.0 kg person jumps upward at a speed of 1.70 m/s. v=?

    asked by Mely

  190. Reading

    what part of the book would you look in to find other book about the same topic

    asked by Reading

  191. Physics

    A certain piece of wire has a resistance of 250 ohms. if the wire is cut in three pieces and the cross sectional area of each piece is halved, what is the resistance of each piece?

    asked by Kate

  192. Math

    I was assigned an ISU for Data management. In first part, it requires a thesis (Example: Why do teenagers pay so much for car insurance?), hypothesis and 3 main points to back up thesis. I told my teacher that I wanted to do about death rates, what factors

    asked by Jacob

  194. Physics

    The established value for the speed of light in a vacuum is 299 792 458 m/s. What is the order-of-magnitude of this number?

    asked by Olivia

  195. Chemistry

    Please help me understand!..If you have 100.0mL of a 30.0% aqueous solution of ethanol, what volume of water is in the solution?

    asked by Emily

  196. physics, error calculation repost

    I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've never had to derive

    asked by Trace

  197. physics

    A 8.00 kg shell at rest explodes into two fragments, one with a mass of 2.00 kg and the other with a mass of 6.00 kg. If the heavier fragment gains 130 J of kinetic energy from the explosion, how much kinetic energy does the lighter one gain?

    asked by Joe

  198. physics

    an object is moving so that its kinetic energy is 83.8 J and the magnitude of its momentum is 27 kg m/s what is the speed of the object

    asked by Anonymous

  199. math

    if gunnar gives me a cookie, i will have twice as many cookies. if i give gunnar a cookie, we will have the same number of cookies. how many cookies do i have and how many cookies do gunnar have?

    asked by jockalyn quswbey

  200. religion

    what sociopolitical issues helped spur the Reformation?

    asked by matt

  201. Physics

    An inflated balloon occupies a volume of two (2) liters. The balloon is tied with a string and weighted down with a heavy stone. What is its volume when it reaches the bottom of a pond 5.2 meters deep? Assume the atmospheric pressure is equal to 1

    asked by Ariannah

  202. algebra

    i need help on factoring. the equation is 4x^3 - 6x^2 + 10x - 15. how do you do this problem?

    asked by tru

  203. Physics

    A one-liter container completely filled with mercury has a mass of 13.6 kg and weighs 133.3 N. What is the buoyant force on the container if the container is placed in water?

    asked by Ariannah

  205. Physics

    Suppose a certain type of deciduous tree releases 7500 leaves on average each fall. If the average mass of each leaf is 1.7 g and a 135 000 acre forest has 206 of these trees per acre, how many kilograms of leaves are dropped on the forest floor each fall?

    asked by Olivia

  206. math

    Please help me I'm stuck on this one: (5x4)-2=12+ I'll try (5x4) 20-2=12+ answer 18 or (5x4) 20-2=18 12+18=30 Really I don't think either is right

    asked by ron

  207. Physics

    Describe how surface area and volume are related in solids? Give an example.

    asked by Ariannah

  208. Physics

    How is surface tension illustrated by water on a coin?

    asked by Ariannah

  209. Physics

    Explain how a drop of water bulging over the edge of a coin demonstrates surface tension.

    asked by Ariannah

  210. Physics

    Describe how you can determine the specific heat of an unknown metal whose mass is known.

    asked by Ariannah

  211. Physics

    Certain kinds of steel expand one part in 100,000 for each 1o C they increase in temperature. If a section of a bridge that has no expansion joints has a length of 1.5 km when the temperature is 50o C, what is its length when the temperature is 80o C?

    asked by Ariannah

  212. Math

    My 7th grade daughter has the following math problem and gets zero help from her "language arts" teacher who gave out this problem: WANT X BE ________ CAREER Each letter in this question stands for a 1-digit #. No 2 letters may stand for the same #. Find

    asked by KP

  213. Physics

    A 32-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 205 J from 435 J. How high does she rise during this interval? Neglect air resistance.

    asked by James

  214. grammar

    What would be the simple predicate? The insects' bodies can turn wood into food. I think it would be turn.

    asked by Wesley

  216. geometry

    If a triangle side lengths of 12 cm, 35 cm, and 37 cm, what type of angle is it?

    asked by sandy

  217. Grammar

    What is simple predicate? These insects are strange and amazing creatures. Would it be are?

    asked by Wesley

  218. Statistics

    A recent survey found that 63% of all adults over 50 wear glasses for driving. In a random sample of 80 adults over 50, what is the mean and standard deviation of those that wear glasses?

    asked by Anonymous

  219. math

    2.75 divided by 1000

    asked by sandra

  220. pre calc

    in many parts of the coutry the average temp of a particular area may be modeled by a sin usoidal function. According to NCDC the average temp of k city is 92.2 in july and 32.2 in january assume that the period is 12 what is the best model for when july

    asked by bandit55751

  221. grammar

    Simple predicate? The history of these pests may surprise you. Would it be may?

    asked by Wesley

  222. geometry

    Suppose line AB is parallel to line MN.Name all angles congruent to angle 8. In the figure at the right, x is parallel to y.List all angles that are congruent to angle 1. If the measure of angle 5 is 45 degrees, what are the measures of the other angles.

    asked by me

  223. physics

    A book weighing 29 N is placed on a table. if the support force back on the book from the table is 29 N, what is the net force?

    asked by Emily

  224. grammar

    What is simple predicate? Its legs make it one of the world's fastest insects. Would it be make?

    asked by Wesley

  225. Income Tax

    Filing an income tax return I need the steps, there are I think 6 steps, is there a site that shows the steps?

    asked by Anonymous

  227. chemistry

    A pickling solution is prepared by dissolving 278 g of NaCl in 4-1 L of water. Calculate the osmolarity of the solution

    asked by bob

  228. geometry

    what is true about the slopes of two perpendicular lines niether of which is vertical?

    asked by sandy

  229. physics

    What is the acceleration (in meters/second^2) of a freely falling 74.0 kg sky-diver, if air resistance exerts a force of 264 N?

    asked by nm

  230. math

    which algebraic expression represents tamara age if she is 7 years younger than her sister? Assume her sister's age is a. A. a-7 B. a+7 C. 7-a D. 7a I think the answer is c.

    asked by Holly

  231. physics

    A 0.110 kg baseball, traveling 32.0 m/s, strikes the catcher's mitt, which recoils 14.0 cm in bringing the ball to rest. What was the average force (in newtons) applied by the ball to the mitt?

    asked by nm

  232. Geometry

    The vertices of ∆GHJ are G(-2,3), and J(1,3). If ∆KLM ≅ ∆GHJ, fing LM.

    asked by sandy

  233. physics

    A wooden box weighing 281 N is pushed across the floor by a workman who exerts a horizontal force of 166 N. If the force of friction between the box and the floor is 21 N, what is the acceleration (in meters/second^2) of the box?

    asked by nm

  234. math

    Brookes quiz scores are as followed; 12/20, 12/18, 85%, 5/10 What is the order from least to greatest of the scores?

    asked by marshal

  235. English

    In Emily Dickinson poems she has some of the first letters of words capitalized. Why so?

    asked by English<3

  236. precalc

    in many parts of the coutry the average temp of a particular area may be modeled by a sin usoidal function. According to NCDC the average temp of k city is 92.2 in july and 32.2 in january assume that the period is 12 what is the best model for when july

    asked by bandit55751

  238. Math

    what fractions are greater than 3/4?

    asked by Olivia Hines

  239. geometry

    WHAT IS THE JUSTIFICATION FOR

    asked by ROMALLO

  240. 5th grade math

    is 13/20 greater than 3/4

    asked by Olivia Hines

  241. literature

    In the book code orange: How do they cure the small pox?

    asked by laurie

  242. math

    which algebraic expression represents tamara age if she is 7 years younger than her sister? Assume her sister's age is a. A. a-7 B. a+7 C. 7-a D. 7a I think the answer is c.

    asked by marshal

  243. math

    Can someone answer this ans show me how to solve? (16-8)+(4x4)

    asked by Liberty

  244. Math

    What does x equal in this question? -0.75x - 1.25 = 6.25

    asked by Kegan

  245. geometry

    What is the justification for angle 1 and angle 2 are complementary

    asked by ROMALLO

  246. geometry

    f(x)=2x²-Bx+4 and f(3)=13, what is the value of B?

    asked by brian

  247. geometry

    what is the justification of m angle 1 + m angle 2 = 90degree

    asked by ROMALLO

  249. geometry

    what is the justification for m angle 1 = 60degree

    asked by ROMALLO

  250. physics

    The current through a light bulb connected across the terminals of a 120 V outlet is 0.25 A. At what rate does the bulb convert electric energy to light 1Your answer was incorrect, but has changed from what was graded. W

    asked by nkechi

  251. English

    1. He got into college last year. 2. He went into college last year. 3. He got to college last year. 4. He went to college last year. (Are the four all the same in meaning? Which ones are commonly used?)

    asked by rfvv

  252. geometry

    what is the justification of 60degree + m angle 2 = 90degree

    asked by ROMALLO

  253. chemistry

    Arrange the following aqueous solutions in order of increasing freezing points (lowest to highest temperature): 0.10 m glucose, 0.10 m BaCl2, 0.20 m NaCl, and 0.20 m Na2SO4.

    asked by Bianca

  254. chemistry

    Why are some chemicals addictive in all people, some only in some people, and some are not addictive in anyone?

    asked by sammy jo

  255. geometry

    The medians of the legs of a right triangle are 3 square root 6 and 6. What is the length of the hypotenuse?

    asked by Me too

  256. chemistry

    How would you prepare a standard solution of 1m HCL(5.6 of HCL is 1.18)?

    asked by Joy

  257. Statistics

    The weights of adult males are normally distributed with a mean of 172 lb and a standard deviation of 29 lb. 1.Find the weight that divides the upper 2% of weights from the lower 98%. Can anyone please explain how to do this,I have no idea from where to

    asked by Plzz helpp

  258. geometry

    Write a flow proof:if angle 1 and angle 2 are vertical angles, and angle 2 and angle 3 are complementary, then angle 1 and angle 3 are complementary.

    asked by Isis

  260. Socials

    Im working on a map about the railways in British North America, 1865. And it shows all the railways like the Grand Truck Railway, Maritime Railway, Intercolonial Railway, American Railway, Great Western Railway, and the Northern Railway. And basically the

    asked by Sara

  261. Chemistry

    Put the following solutions in order of increasing vapor pressure. Explain your reasoning. .060 m K2CO3 .030 m LiC2H3O2 .120 m C2H6O2 (a non-electrolyte)

    asked by MMPM

  262. Chemistry

    The boiling point of phosphine, PH3(-88C) is lower than that of ammonia, NH3(-33C) even though phosphine has twice th molar mass of NH3. Why?

    asked by MMPM

  263. calculus

    Under what conditions for f'(x) and f''(X) can a graph be " straight" wthout being horizontal?

    asked by gINa

  264. math

    How many rectangles can be made with a perimeter of 10 units

    asked by mikecia

  265. physics

    15000N on earth 2250N on moon Moon Radius= 1.74x10^6m Orbital Height 100km Total orbit 1.84x10^6m What is orbital speed?

    asked by bob

  266. MATH

    The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 153 yards with a 7-iron how far should he average with a 5-iron Express your answer as an integer or mixed number. 183.6 The appliance store where the

    asked by anonymous

  267. math

    3. Suppose a ladder is 12 ft. long. The base of the ladder is 5 ft. from a wall, and the top of the ladder is leaning against the wall. How far above the ground is the tip of the ladder?

    asked by joan

  268. MATH

    Martin takes out a simple-interest loan at 7.5 %. After 6 months, the amount of interest on the loan is $69.64. What was the amount of the loan? is $522.30 correct

    asked by anonymous

  269. Math

    Debra is buying prizes for a game at her school's fundraiser. The game has three levels of prizes, and she has already bought the second and third prizes. She spent $1.54 on each second place prize and $0.77 on each third place prize. She wants the first

    asked by Anonymous

  271. 8th grade honors english

    How do I properly site sources on my research paper?

    asked by Tina

  272. math

    HOw can I find the domain and range of this problem 4x^3-39x^2+93.5

    asked by joseph

  273. precalc

    cos(θ)=-((3)/(7)) where pi

    asked by bandit55751

  274. FRENCH

    Conversation Culturelle Étienne is waiting for his friend Aurélie at the exit of the Champs-Élysées - Clemenceau métro station. They are going to see an art exhibit at the Grand Palais. Étienne: Enfin! J'ai attendu une demi-heure. Aurélie:

    asked by Sidney

  275. Calculus

    Differentiate the following ( do not simplify) a) ln(√sinx)

    asked by Zukii

  276. PHYSICS

    A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

    asked by JACKSON

  277. Chemistry

    What is the concentration of nitrate ions in a solution that contains M aluminum nitrate?

    asked by Mm

  278. chemistry

    How many moles of ammonia gas can be produced from the reaction of 3.0L of N2 and 3.0L of H2 according to the following equation: N2(g) + 3H2(g)---> 2NH3(g)?

    asked by jerome

  279. geometry

    what is the justification of 60degree + m angle 2 = 90degree

    asked by help Ms.Sue

  280. Math

    Thankyou very much! I'm having trouble with this question about taylor series. how would i go about doing the following questoin? thank you! find the maclaurin series for the function sin(x)-x+((x^3)/3!) how do i do this? thanks aagain

    asked by KIKSY

  282. math

    can you explain how to do this 8w + 1.5= 25.5

    asked by nia

  283. english

    opposite of cold \choices of answers bucket quick preset raise rock sick sleep small story yell make large jump home glad close car bucket

    asked by natalie

  284. math

    scale drawing of a right triangle, base= 4ft, height= 2 ft, scale = 1/2 inches = 2ft, finf the area of the scale drawing.

    asked by helen mimis

  285. College Physics

    n the approximation that the Earth is a sphere of uniform density, it can be shown that the gravitational force it exerts on a mass m inside the Earth at a distance r from the center is mg(r/R), where R is the radius of the Earth. (Note that at the the

    asked by Amelie

  286. AP Chemistry

    There is an unknown amount of unlabelled monoprotic acid in an unknown amount of water titrated with a sample with a solution of NaOH of unknown molarity. After adding 10.0 mL of NaOH, the pH=5.0. The equivalence point is 32.22 mL of NaOH. What is the Ka?

    asked by Ben

  287. Geometry

    Tan12= 3/x what is the value of x? and how is that so?

    asked by Aminah

  288. Physics

    A student manages to get on the roof of a school and toss out a balloon with the speed of 10.0m/s. The height of the school is 25.0 m. How long was the balloon in the air?

    asked by Romero

  289. Physics

    An old car is traveling down a long, straight, dry road at 25.0 m/s when the driver slams on the brakes, locking the wheels. The car comes to a complete stop after sliding 305 m in a straight line. If the car has a mass of 755 kg, what is the coefficient

    asked by Amanda

  290. eth125

    Explain what is meant by the model or ideal minority. How is this label both a positive and negative one? How has the media contributed to prejudice and discrimination against Asian Americans? How might these problems be remedied? What does the Japanese

    asked by stacie

  291. Calculus

    The area of largest isosceles triangle that can be drawn with one vertex at the origin and with others on a line parallel to and above the x-axis and on the curve y=27-x^2 is.... A) 108 B) 27 C) 12 root 3 D) 54 E) 24 root 3

    asked by Sal

  293. physics

    An object moves from the position r1=(2,-10,3)m to the position r2=(-2,3,7)m and then to r3=(3,-4,-2)m. Find a)displacement b)distance

    asked by sandhu

  294. Calculus

    Evaluate the integral. S= integral sign I= absolute value S ((cos x)/(2 + sin x))dx Not sure if I'm doing this right: u= 2 + sin x du= 0 + cos x dx = S du/u = ln IuI + C = ln I 2 + sin x I + C = ln (2 + sin x) + C Another problem: S ((sin (ln x))/(x)) dx I

    asked by CMM

  295. Chemistry

    How many grams do 5.2×10^20 atoms of silicon weigh? Answer in units of g.

    asked by Bob

  296. physics

    Dear Sir; I am writing in response to your request for additional information in Block #3 of the accident reporting form. I put "Poor Planning" as the cause of my accident. You asked for a fuller explanation and I trust the following details will be

    asked by plz help asap

  297. math

    Two events are _________ if the outcome or occurrence of the first affects the outcome or occurrence of the second so that the probability is changed. Please Help Me . !

    asked by Tanya

  298. career

    How do you do a resume? and could someone show me how to go about starting a resume?

    asked by Betty

  299. Chemistry

    How much lead (Pb) is in 3.01 × 10^12 atoms of lead? Answer in units of mol.

    asked by Chuck

  300. quimica

    como se llama el gas que se desprende de mezclar acido acetico con vinagre?

    asked by Anonymous

  301. physics

    A car is traveling a road that includes two sides of an equilateral triangle with a constant speed s. What is the magnitude of the average velocity v of the car?

    asked by sandhu

  302. algebra

    Could you give an example of an exponential expression? thx, I cant think straight it's too late =P 11:00 pm here

    asked by popcorn010

  304. Chemistry

    2. When a 1.000 g sample of the rocket fuel hydrazine, N2H4, is burned in a bomb calorimeter which contains 1200g of water, the temperature rises from 24.62C to 28.16C. If the C for the bomb is 840 J/C Calculate: q reaction for combustion of a one-gram

    asked by Johnny

  305. organic bio chemistry

    how many mL of a 0.20M KOH solution is needed to neutralize 25 mL of 0.25 M H2SO4?

    asked by lisa

  306. chemistry

    What is the chemical structure, its principle source, its legals uses (if any) and its relative addictiveness on scale 1-10 : CAFFEINE

    asked by annonymous

  307. math

    solve this problem using the power rule (10x^8) x (10x^10) =

    asked by jj

  308. Chemistry

    How many atoms of carbon are present in 31.4 g of a compound that is 16.2% carbon, by weight? Answer in units of atoms.

    asked by Jackson

  309. Science

    1) A piece of paraffin wax has a density of 9g/cm3, mass of 900g, and a volume of 100cm3. If the wax was melted to the liquid state, approximately what would it's volume be? Would this wax float or sink in water? Explain. 2) A tin box ( Mass of 80g, Volume

    asked by Alisha

  310. Chemistry

    A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.

    asked by Melissa

  311. Chemistry

    A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.

    asked by Melissa

  312. math

    joe borrows $4,000, the loan is for 18 months at 5% interest, whats the total amount due on the loan?

    asked by brittney

  313. Pre Algebra

    Find the Original Amount: NEW AMOUNT: 210 75% INCREASE **please help me as soon as possible and explain steps please!**

    asked by INEEDHELP! :(
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