Questions Asked on
May 24, 2010

  1. Cartesian Vectors

    An airplane is flying at an airspeed of 345 km/h on a heading of 040 degrees. The wind is blowing at 18 km/h from a bearing of 087 degrees. Determine the ground velocity of the airplane.

    asked by Anonymous
  2. Chemistry

    Explain why when you microwave a plate of steak and potatoes, the potatoes heat up first.

    asked by Kaj
  3. Business Law

    Miguel buys a truck in Texas, then moves to Washington. A year later, he is driving his truck in Oklahoma, and causes an accident by running into another car, whose driver is from Florida. In what states will the other driver be able to sue Miguel? State

    asked by Britney
  4. Geometry

    A small circular pool is enclosed in a square. Find the area inside the square, but outside the circle. The Square is 4.3m x 4.3 m

    asked by Maghan
  5. Geometry

    If the surface area of a sphere decreases, will the value of the volume remain the same?

    asked by Don
  6. Math

    A basketball player has a 40% shooting average from the free-throw line. If she takes two free throws, estimate the probability that she will make both of them. Use the following list of digits which was taken from a table of random numbers. Let the digits

    asked by Anthony
  7. physics

    A soccer player kicks a rock horizontally off a 41.7 m high cliff into a pool of water. If the player hears the sound of the splash 3.08 s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.

    asked by lau
  8. science

    name 3 places whwere surface water might be stored

    asked by linze
  9. Math

    Anyone know about how much a button weighs in mg?

    asked by Don
  10. science

    how is groundwater in underground aquifers refilled as humans pump it out to use?

    asked by linze
  11. math

    solve this equasion-4x-18+3x+20=4

    asked by jordan
  12. Chemistry

    Determine whether a solid forms when solutions containing the following salts are mixed. (Express your answer as a chemical equation. Identify all of the phases in your answer) NaF and AgNo3 MnSO4 and Na2CO3

    asked by David
  13. physics

    mass = 46 kg, angle 20 degrees, tension 240 newton , coefficient of kinetic friction = 0.5 find acceleration of the object

    asked by Anonymous
  14. 11th grade

    what is the chemical reaction equation for : Hydrogen sulfite reacts with oxygen to form sulfur dioxide and water vapour.

    asked by Cats
  15. Statistics

    The psychologists are interested in whether depressed people undergoing group therapy will perform a different number of activities of daily living before and after group therapy. Therefore, the psychologists have randomly selected 8 depressed clients in a

    asked by Ashley
  16. ethnicity

    • National organizations such as the Bureau of Indian Affairs, the National Congress of American Indians, and the National Indian Gaming Association are dedicated to Native American affairs. What effect have these organizations had on reducing tribal

    asked by mariaaa
  17. chemistry

    i need steps of solving this question Balance the oxidation reduction equation in electron ion / half reaction please best regards

    asked by h a i a e
  18. English

    Why is the telephone convenient? 1. We don't have to talk face to face. 2. We don't have to write letters to someone that is far away from us. 3. We don't have to write letters to people who are far away from us. 4. We don't have to visit others' houses to

    asked by rfvv
  19. chemistry

    I need steps of solving this question Balance the oxidation reduction equation in electron ion / half reaction PbO2 + KCL = KCLO + KPb(OH)3 please best regards

    asked by h a i a e
  20. chemistry

    why is the osmotic pressure of 10 mole solution sodium chloride larger than that of sodium nitrate solution

    asked by taher
  21. Microeconomics

    1. Demand can be perfectly elastic or inelastic.Discuss. 2. Discuss 3 main properties of indifference curves(15marks) b) Describe marginal rate of substitution.

    asked by Annmarie
  22. math

    solve for x x+4/5-x+3/3=-7/15

    asked by jerson
  23. English

    Can you please consider these sentences from a grammatical and lexical point of view? Thank you in advance. 1) Since the last years of the 19th century Europe started to live a very deep crisis. (Since the last years.... had been experienced?) 2) Freud

    asked by Franco
  24. MATH

    The distance from A to B is d km and that from B to C is x km. if a bus maintains an average speed of 50km/hr between A and B and 60km/hr between B and C, it takes 3 hours to travel from A to C. If it maintains 60km/hr between A and B and 50km/hr between B

    asked by Vivianne
  25. english

    explanation and description no child left behind

    asked by teresa
  26. 12th grade

    what is the analogie for abject:miserable

    asked by Kiara
  27. chemistry

    why do batteries keep their charge if kept in a refrigerator over a long period of time

    asked by ciearra
  28. Maths

    Assuming the lord of the rings film trilogy contains 4.4 GB of data, how long would it take to download via 2Mbps connection? In seconds?

    asked by DezQ
  29. health

    What are the three most significant concepts you have learned in this course that you would include in a speech supporting incorporation of health psychology concepts in health care policy ...

    asked by Anonymous
  30. math help please

    x+4/5-x+3/3=-7/15

    asked by jerson
  31. history

    „X Choose one social, economic, or political event that you studied from each of the five decades following World War II¡X1950s, 1960s, 1970s, 1980s, and 1990s¡Xthat you think had a more powerful impact on the American people than other events within

    asked by jajuan
  32. English

    Is there a verb for "question someone doubtfully or suspiciously"?

    asked by Emily
  33. physics

    A car is traveling with a constant speed 80 miles per hour a road that makes half a circle. What is the average velocity of the car?

    asked by ray
  34. physics

    4. Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5 m/s and the latter moving to the left with the speed 3 m/s.After collision they stick together. What amount of mechanical energy is lost? 5. A cylinder with a

    asked by ray
  35. physics

    2.A ball rolls off a shelf with a horizontal velocity of v. At what horizontal distance from the shelf does the ball land if the height of the shelf is h above the floor? 3. A car travels around a circle with a diameter of 500 m at a constant speed of 25

    asked by ray
  36. English

    1. Solar energy will never give out. 2. Solar energy will never run out. (Are both the same?) 3. We bought many foods. 4. We bought much food. (Which one is right? Are both OK? Is food a material noun, a common noun or a collective noun? In dictionaries,

    asked by rfvv
  37. physics

    Suppose a rock fell off a cliff. After 5 seconds, its speed well be 100 m/s

    asked by Anonymous
  38. math

    Tom drew a triangle with angle measures of 130°, 24°, and 26°. How would you classify Tom’s triangle based on the measures of the angles?

    asked by Anonymous
  39. college physics

    A car travels around a circle with a diameter of 500 m at a constant speed of 25 m/s. The static friction coefficient is 0.3 and the kinetic friction coefficient is 0.2. Will the car skid?

    asked by Anonymous
  40. physics

    A car is traveling with a constant speed 80 miles per hour a road that makes half a circle. What is the average velocity of the car? Is it: 80(pi/2)=125.6? or should I use the formula: Äd/Ät= 80/(pi/2)=50.95?

    asked by Anonymous
  41. COM 220

    The news from China in recent weeks has been dire. Violent strikes and protests are reported almost daily. Millions of workers are out of jobs. Economic indicators presage more gloom, with electricity production for industry falling 4% in October, the

    asked by Amanda
  42. algebra

    a ladder is against a building. The distance from the bottom of the building to the ladder is 9 feet less than the length of the ladder. How high up the side of the building is the top of the ladder if that distance is 2ft. less than the length of the

    asked by amanda
  43. Internet Basics

    Which of the following tools is best for accessing Web pages and connecting to the Internet? ISP Modem Search Engine Browser

    asked by Karin
  44. English

    Wha are the nouns that describe a person called? They are like a noun that describe's a person's perosnality, such as perfectionist, troublemaker, bookworm etc.

    asked by Emily
  45. physics

    A ball rolls off a shelf with a horizontal velocity of v. At what horizontal distance from the shelf does the ball land if the height of the shelf is h above the floor?

    asked by Anonymous
  46. math

    Find the center and radius of the circle. (x - 1)^2 + y^2 = 36

    asked by Tina
  47. HRM

    what are the disavantages of job analysis?

    asked by Maria
  48. English-cover letter

    This is the first sentence of my cover letter. Should I use "for" or "at"? Or is there a better way to phrase this sentence? I am writing to express my interest in working for [Company name] or I am writing to express my interest in working at [Company

    asked by Janice
  49. algebra

    State any restrictions on the variables. 3y^2 - 3y/ y - 3

    asked by Anonymous
  50. Asia - JAPAN- Pollution

    Hi, I have got a question about Japan's geography; In which ways has the actions of man ( people) affected Japans land? I mean like acíd rain, carbon dioxide etc.( negative effects on the country) I've been googling it, but I can´t find anything. Bea

    asked by Beatrice
  51. calculus

    The area of the parallelogram formed by the vectors p = (a, 1, -1) and q = (1, 1, 2) is root 35. Determine the values of 'a' for which this is true.

    asked by Anonymous
  52. physics

    A ball rolls off a shelf with a horizontal velocity of v. At what horizontal distance from the shelf does the ball land if the height of the shelf is h above the floor? can anyone at least give me the formulas to work with?

    asked by Anonymous
  53. English /Lit

    Using literary elements,compare and contrast Abigail Adams letter to her daughter with Jean de Crevecoeur's essay from letter to an American farmer. Now i read both essays, and im very fond of both of them . but i have trouble on what to compare and

    asked by Stephanie
  54. foster

    joe researcher asks for access to patient records as part of a research project. what should the health information manager do?

    asked by Machell
  55. Communications 220

    Create a thesis for your research paper. How do you plan on supporting your thesis with compelling arguments and coutner arguments? This is what I have so far. Please let me know if I need to further explain how I will support the arguments and if the

    asked by Amanda
  56. please help-algebra

    Give the equation of the line that passes through point ( 1, -3) and is parallel to the line y = 2x - 8.

    asked by Tina
  57. English

    Thank you for your invaluable help. Can you please consider these sentences, too? 1) As for her behaviour, she cried when she saw a mouse caught in a trap. 2) He makes a potrait of English society but he does not portray the aristocracy and the peasants.

    asked by Franco
  58. Logic and Design

    Hi, I need help with my program and logic Homework. Here is the problem: Velma and her husband Victor run a full service veterinary clinic. They would like a program to help them calculate costs for their clients. Victor, who is the vet, charges a flat fee

    asked by David
  59. Medical Transcriptionist

    I need help with this scenario please!Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth

    asked by Kay
  60. Chemistry

    The substitution of a monosubstituted benzene is regioselective. If it had been completely random, what would you expect the ortho:meta:para product ratio be? And why?

    asked by Norman
  61. System operations management,

    How might an operations manager improve the operational components of planning, sourcing , making and delivering that was applied inappropriately

    asked by Sahna
  62. chemistry

    if i mix 4 grams of hydrogen and 32 grams of oxygen how many grams of water would be produced

    asked by kee
  63. General Chemistry

    Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.

    asked by Kendra
  64. P Chem

    A 10.0% by mass H2SO4(aq) solution has a density of 1.07 g/mL. (a) How many milliliters of solution contain 8.41 g of H2SO4? (b) What is the molality of H2SO4 in solution? (c) What mass (in grams) of H2SO4 is in 258 mL of solution?

    asked by Jenny Marie
  65. General Chemistry

    3.71 When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCl(aq) -> KCl(aq) + HCN(g) If a sample of 0.140 grams of KCN is treated with an excess of HCl, calculate the

    asked by Kendra
  66. General Chemistry

    Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent. Please

    asked by Kendra
  67. English 12

    In the short story defender of the faith by philip roth,Grossbart insists on caling da sergeant 'sir'.Why doz Marx object?Is dis form of adress merely an oversight,or doz Grosbart hav sum ulterior motive?

    asked by Stella
  68. English 12

    In the short story defender of the faith by philip roth,Identify the criteria by which Captain Barrett judges a man's character.

    asked by Stella
  69. Physical Chemistry

    When 1.33 g of a nonpolar solute was dissolved in 50.0 g of phenol, the latter's freezing point was lowered by 1.454°C. Calculate the molar mass of the solute. The kf of phenol is 7.27 (K·kg)/mol. What is the normal boiling point of an aqueous solution

    asked by Anonymous
  70. English 12

    In the short story defender of the faith by philip roth,Why does Marx refuse to support Grossbart when the Captain questions him about his eating habits?

    asked by Stella
  71. English12

    In the short story defender of the faith,by philip roth,Explain 3 occasions where Grossbart tries to "manipulate" Marx.Is he successful in his attempts?

    asked by Stella
  72. English12

    In the short story defender of the faith by philip roth,Outline 3 occasions where Grossbart accuses Marx of being Prejudiced against his own people(jews)

    asked by Stella
  73. English12

    In the short story,defender of the faith by philip roth,What incident finally convinces Marx to punish Grossbart?

    asked by Stella
  74. English12

    In the short story defender of the faith by philip roth,what is the theme of the story?Justify 150 words

    asked by Stella
  75. English

    What is an antithesis? and I can i create one if my thesis is "Using the characters in these literary pieces both authors assert that humans are naturally inclined to exhibit dark or evil side". My 3 arguments are that metamorphises, quest for the surreal

    asked by Raven
  76. Math Trig

    Suppose that X is an angle in standard position and that X' is it's reference angle. If cosX = -4/ squareroot of 17. find the exact value of cosX' is it 4/square root of 17?

    asked by kyu
  77. math 7th grade

    Segment AB has endpoints A(-3, 4) and B(-5, 2). Segment AB is reflected over the y axis to form segment A’B’. What are the coordinates for the endpoints of A’B’? A. A’(3, -4) and B’(5, -2) B. A’(3, 4) and B’(5, 2) C. A’(-3, -4) and

    asked by Kyasia
  78. chemistry

    . How many grams of potassium chloride, KCl, are needed to prepare 0.630 L of a 2.50 M solution of potassium chloride? (4.0 points) (Points :4) 1.575 M 117 g 2.54 m 23.19 g

    asked by Anonymous
  79. Physics

    What is the speed of an object in circular motion called?

    asked by James
  80. Chemistry

    25g of a breakfast cereal contain 110 calories. How many calories are released per gram? Convert the answer above to joules.

    asked by Anonymous
  81. Physics

    What is the centripetal acceleration of a skater moving with a tangential speed of 2.0 m/s in a circular path with radius 2.0 m?

    asked by James
  82. Physics

    What term describes a force that causes an object to move in a circular path?

    asked by James
  83. Physics

    A centripetal force acts

    asked by James
  84. Physics

    Centripetal force can be calculated from centripetal acceleration by?

    asked by James
  85. Physics

    Describe the primary force or forces involved when a car executes a turn. Explain why passengers tend to lean or slide toward the outside of the turn.

    asked by James
  86. Physics

    A 1.3 X 10^3 kg car traveling with a speed of 2.5 m/s executes a turn with a 7.5 m radius of curvature. Calculate the centripetal acceleration of the car and the centripetal force acting on the car.

    asked by James
  87. writing

    o Many professional athletes use steroids, in spite of the fact that they are banned by official sports organizations. Answer the following questions regarding the topic that you have chosen: Which kinds of supporting paragraphs—examples, details,

    asked by Anonymous
  88. Algebra

    7X-4+3X=23+X Can you show the steps? The answer is X=3

    asked by Chelsea
  89. Chemistry

    For each: Always true /sometimes true/never true. 1) the joule is the SI unit of force 2)the standard heat of formation for a substance is determined at 100 degrees C 3)all free elements in their standard states have a heat of formation of zero.

    asked by Anonymous
  90. Chemistry

    A 55.6g sample of water is cooled from 50 degrees C to 35.5 degrees C. How many calories released? How many kilocalories? How many joules?

    asked by Anonymous
  91. math

    I'm struggling with this problem and can't find a good example in my book of how to solve. solve for y y-1/x-0=-3 thanks in advance

    asked by Jarzine
  92. Chemistry-Could you check this, please?

    I have a balloon that contains 22 grams of Carbon dioxide. The barometric pressure is 1019 millibars which I converted to 1.006 Atm and the temperature is 299 "K". What is the volume of balloon? I used the ideal gas law to find out the volume in liters of

    asked by JamieLyn
  93. chemistry

    How many grams of solute are in each of the following solutions? 18.4 mL of a 9.50 m H3PO4 solution

    asked by Ashley
  94. Science, Chemistry

    How many calories would be needed to heat 1.65 kg of gold from 12 degrees C to 25 degrees C?

    asked by Nicole
  95. trigonometry

    solve sin(2θ)+1=0 on the interval 0≤θ≤2pi

    asked by Anonymous
  96. algebra

    what is the square root of -3 and180h^4

    asked by Tinkerbell
  97. Genera Chemistry

    Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.

    asked by Kendra
  98. middle school science

    Why are wetlands called transition zones? Also, how can oxygen be depleted in a body of water? Please help! thanks!

    asked by schoolgirl
  99. Science

    Why is rain normally acidic, what creates acid rain? Also What is SAV? THANKS!!

    asked by smiley face
  100. 6th grade

    can some one help me i need help wit animal habitats

    asked by cassidy
  101. maths PLEASE HELP

    how do you solve this for x i keep getting stuck with x in too many places 4^x -6(2^x) -16 =0 i assume you have to use ln but i think im missing a step because i just get something which is more complicated than what you start with thank you

    asked by jessie
  102. Science

    Which water quality test is the most important test for the health of a water ecosystem? Thanks

    asked by big red
  103. physics

    What is the total resistance in a parallel circuit with a 10 ohm lamp and a 15 ohm lamp?

    asked by maryanne
  104. please help

    Give the equation of the line that is perpendicular to the line and passes through point (0, -1).

    asked by Tina
  105. Macroeconomics

    Suppose the economy has been experiencing zero inflation and five percent unemployment for several years. The government decides to lower the unemployment percentage by generating some inflation. You need to do the following: 1)create a graph showing what

    asked by Joe
  106. chemistry

    Calculate the concentration of SO2(ppm) that must be reached in polluted air (in ppm) if the dissolved gas is to produce a pH of 3.2 in raindrops without any oxidation of the gas.

    asked by Anonymous
  107. chemistry

    Taking the mass of the atmosphere to be 6.0E15 metric tons, what mass of carbon must be burned in order to increase the average carbon dioxide level in the atmosphere by 110ppm by volume (in metric tons)?

    asked by Anonymous
  108. business writing

    I need to write an application letter responding to a job ad for an office asst position. This letter should accompany my resume.

    asked by Ivette
  109. world history

    the jews who lived scattered around outside of judah are called the

    asked by any
  110. English

    Can you please check if the following sentences are possible? Thanks in advance. 1)Sterne breaks the rule of the conventional biography since Tristram’s birth occurs only in the third episode. 2)Furthermore, he doesn’t follow a story-line since the

    asked by Franco
  111. AED 204

    In 200 to 300 words name two other factors that have potential to prevent equality in education. Elaborate on the two you choose. Other than the obvious obstacles of prejudice and discrimination (such asa, boys getting more attention than girls; minorities

    asked by Rayna
  112. world history

    Who was the Columbian Exchange named after and why?

    asked by ali
  113. algebra 2b

    Determine in which direction the parabola opens y equals x2-7x plus 18?

    asked by elizabeth
  114. calculus

    Find the equation of the tangent line to the graph of f(x)=4ln(9x+2)at the point of x-coordinate x=2.

    asked by JER
  115. career

    If two jobs are upon you which one do you take the more sucessful one which you do not like the actions taking place or the less sucessful one which you kinda like.

    asked by ali
  116. math

    Find the slope of the line passing through the points (7, 0) and (0, 10).

    asked by chris
  117. physics

    a dog walks 28 steps north and then walks 55 steps west. if the daog walks back to the starting point in a straight line, how many steps will the dog take? find the magnitude of the net displacement

    asked by ang
  118. Math

    solve sin(2θ)+1=0 on the interval 0≤θ≤2pi

    asked by Julie
  119. Chemistry

    Could a Bronsted-Lowry acid not be an Arrhenius acid? Explain. Could someone explain the answer to me?

    asked by Ana
  120. lal

    present and past participle i have to write if each participle are past or present. are my answers correct 1. everyone has wondered(past participle)what the great detective was thinking(present participle) 2. carol has rescued(past part.)the

    asked by Sara!
  121. algebra 2 / trig

    what is the square root of negative 150?

    asked by Allison
  122. physics

    a caribu trecks 125m at 35 degrees west of south, and then 105m west. what is the caribus resultant displacement

    asked by ang
  123. math

    i don't know get this question 1. last saturday emily rented 4 movies from the video store. this saturday she rented 2 movies. let x represent the cost of renting each movie. write and simplify an expression for how much more emily spent last week renting

    asked by Sara!
  124. Math

    The sum of tow numbers is 5, and their difference is 26. Find the two numbers.

    asked by CB
  125. Algebra 2: Probability and Stats

    The scores on an exam are normally distributed, with a mean of 77 and a standard deviation of 10. What percent of the scores are greater than 87? * 68% * 16% * 84% * 2.5%

    asked by Skye
  126. Algebra 2: Prob and Stats

    The numbers of cookies in a shipment of bags are normally distributed, with a mean of 64 and a standard deviation of 4. What percent of bags of cookies will contain between 60 and 68 cookies? * 50% * 13.5% * 68% * 34%

    asked by Skye
  127. Algebra 2: Prob and Stats

    A survey of 480 high school students found that 37% had a pet. Find the margin of error. Round to the nearest percent. Use the margin of error to find an interval that is likely to contain the true population proportion. * margin of error = +-5% interval,

    asked by Skye
  128. Algebra 2: Prob and Stats

    Find the sample size that produces the margin of error +-4.0% a) 325 b) 25 c) 16 d) 625

    asked by Skye
  129. math

    i don't get this question consecutive integers are integers that differ by one. you can represent consecutive integers as x,x+1,x+2 and so on. write an equation and solve to find 3 consecutive integers whose sum is 33

    asked by Sara!
  130. Chemistry

    How many grams of Ni(OH)2 are produced from the reaction of 30.0 mL of 1.75 M NaOH solution?

    asked by Lynn
  131. Math (URGENT)

    A word problem. David flew 300km on a commuter plane, then 2000km on a passenger jet. The passenger jet flew twice as fast as the commuter plane. The total flying time for the journey was 3.25 hours. What was the speed of each plane, in kilometers per

    asked by John
  132. math

    in super bowl XXXV, the total number of points scored was 41. the winning team outscored the losing team by 27 points. what was the final score of the game? a. 33 to 8 b. 34 to 7 c. 22 to 2 d. 18 to 6 i don't get this question a high school basketball

    asked by Sara!
  133. physics

    a sled is pulled at a velocity across a horizontal snow surface. if a force of 8.0x10 to the first power N is being applied to a sled rope at an angle of 53 degrees to the ground, what is the magnitude force of friction

    asked by josh
  134. LAL!

    what are the to be verbs and to have?

    asked by Sara!
  135. math

    Let f(x)=4x-4and g(x0=x^2+3x, find (f o g)(6).

    asked by CB
  136. physics

    a sled is pulled at a velocity across a horizontal snow surface. if a force of 8.0x10 to the first power N is being applied to a sled rope at an angle of 53 degrees to the ground, what is the magnitude force of friction

    asked by ang
  137. college algebra

    x/2-x/x-4=-4/x-4=-4x^2/2 check this please

    asked by Gregory
  138. Advance Math

    Find solutions of the equation in the interval [0, 2pie} Cos(x+pie/3)+Cos(x-pie/3)=1 I need to show work without calculator and be able to check in order for it to work Thanks for help

    asked by Mike
  139. algebra

    3/x+5/3x=1 9x+5x=1 14x=1 x=-13 is this right

    asked by Angelia
  140. Chemistry

    25g of a breakfast cereal contain 110 calories. How many calories are released per gram? Convert the answer above to joules.

    asked by Anonymous
  141. Chemistry

    A 55.6g sample of water is cooled from 50 degrees C to 35.5 degrees C. How many calories released? How many kilocalories? How many joules?

    asked by Anonymous
  142. Chemistry

    For each: Always true /sometimes true/never true. 1) the joule is the SI unit of force 2)the standard heat of formation for a substance is determined at 100 degrees C 3)all free elements in their standard states have a heat of formation of zero.

    asked by Anonymous
  143. physics

    a warehouse worker pulls on the handles of a 96.0 kg cart witha net force of 128N an angle of 55.0 degrees above the horizontal. Attached to the cart is a smaller cart having a mass of 72.0kg. What is the magnitude of the horizontal acceleration of the

    asked by julie
  144. physics

    How much work is done on a bookshelf being pulled 5.00m at an angle of 37.0 degrees from the horizontal? The magnitude of the component of the force that does the work is 43.0N

    asked by julie
  145. math

    i don't get this question consecutive integers are integers that differ by one. you can represent consecutive integers as x,x+1,x+2 and so on. write an equation and solve to find 3 consecutive integers whose sum is 33 how do you solve this

    asked by Sara!
  146. math ( CHECK MY WORK)

    1. on 3 tests, a student scored a total of 258 points. if the student improved his performance on each test by 5 points, what was the score on each test a. 81,86,91 b. 80,85,90 c. 75,80,85 d. 70,75,80 is the correct answer A. 2. an item costs x dollars.

    asked by Sara!
  147. math

    consecutive even integers can be represented by x,x+2,x+4 and so on. write an equation and solve to find 3 consecutive even integers whose sum is 54.

    asked by Sara!
  148. Biology 2

    How is the ability to regenerate lost body parts for most echinoderms?

    asked by Avalon
  149. Calculus

    Find the volume of the tetrahedron with verticies (1,1,2), (3,-4,6), (-7,0,-1) and (-1,5,8).

    asked by Anonymous
  150. powerpoint presentation

    When making a powerpoint presentation, do you put the citations on the slide or in the speakers notes or both? Thank you.

    asked by Amanda
  151. science

    The "I WONDER...." PROJECT FROM SCHOOL.I AM TO COMPLETE THE QUESTION AND THEN RESEARCH THE FINDINGS ON A DISPLAY BOARD AND PRESENT IT TO THE CLASS.MY QUESTION IS CAN PAPER BE MADE FROM SOMETHING OTHER THEN TREES?I NEED SOME SOURCES OTHER THEN THE WEB.ANT

    asked by amie
  152. math please help

    Give the equation of the line that is perpendicular to the line y=x+4 and passes through point (0, -1).

    asked by Tina
  153. physics

    Two long parallel wires carry currents of 10 A in opposite directions. they are separated by 40 cm. what is the magnetic field in the plane of the wires that is 20 cm from one wire and 60 cm from the other?

    asked by manisha
  154. 10th grade

    a rhombus has a perimeter of 44 centimeter and a diagnol 12 centimeters long. wat the area?

    asked by trey
  155. Calculus

    Given vectors u= (t, 2t, 3) and v=(2t, 5t, -1). For what values of t a) are u and v parallel? b) are u and v perpendicular?

    asked by Ria
  156. Pre Calc!

    Two ships, one sailing at 30 km/hr and the other at 45 km/hr, left port at the same time. Three hours later they were 120 km apart. If you had to find the angle between their courses an equation that could be used to solve this problem is:

    asked by Ilene
  157. geogrraphy

    what is the second most highly populated country in north Africa? Algeria Correct?

    asked by natalie
  158. alegebra 1

    would 3x^2-15x+18 = x(x+5)(x-3)????

    asked by bri
  159. math

    Find two fractions that are equivalent to each fraction: 2/5, 7/11, 15/23 and 150/325 and how do i solve it?

    asked by joshuah
  160. Science

    I have to create a powerpoint presentation for my science class and I am not sure if i only hav eto put cications on the slides, or it i put them in the speakers notes as well.

    asked by Amanda
  161. geography

    What island country of southern africa has plants and wildlife found in no other country? Madacascar . correct?

    asked by natalie
  162. geography

    Where does one of the hottest and driest areasof africa run along? I am not sure is it atacama desert

    asked by natalie
  163. College Chemistry

    For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it. A chemist runs a second order reaction of A->B starting at 10mili moles/L concentration of A (and no B). After one hour the

    asked by Sarah
  164. geography

    Where does lake Tanganyika lie? The Eastern border of-----.Tanzania. is my answer right?

    asked by natalie
  165. Chemistry

    A gas occupies a 1.5 liter container at 250C and 2.0 atmospheres. If the gas is transferred to a 3.0 liter container at the same temperature, what will be the new pressure?

    asked by Gabriel
  166. college algebra

    3/t-3=5/t+4 3(t+4)(t-3)(5) check this problem

    asked by Gregory
  167. aed

    Answer the following in 200 to 300 words: List three societal issues students face outside of the classroom. Describe the role that you think schools should play in teaching students values and strategies to help them overcome these challenges.

    asked by lashun
  168. Finance

    A CBS bond with a par value of $1,000, an interest rate of 7.625 percent, and a maturity of 10 years The bond is selling for $986. The required rates of return is 6 percent for the bond.

    asked by Britt
  169. water tests...

    Which test is for biotic factors? Which is standard? What is a nutrient, how does it get in water, where does it come from, what does it do?????

    asked by big red
  170. HCR 210

    I have an assignment for week 4 in HCR210 due Sunday. We are to interview small, medium-sized and large medical facilities and ask 13 questions regarding medical/patient records. There are no facilities in my area willing to disclose any information for

    asked by Cathy
  171. Chemistry!!!!

    A student mixed 50.0 mL of 0.50 M H2SO4 (aq) at 18.5 degrees C with 100 mL of 0.50 M NaOH (aq) at the same temperature. After the reaction was completed, the temperature rose to 22.0 degrees C. What was the heat of reaction? (Assuming the densities of the

    asked by Anonymous
  172. calculus

    A box is dragged with a force of 115 N up a ramp a distance of 3 m. If the force makes an angle of 35 degrees with the ramp and the ramp makes an angle of 20 degrees with the ground, how much work is done?

    asked by Anonymous
  173. math

    2/3x+1/x=1/6 2x+3x=1/6 5x=1/6 check problem

    asked by frances
  174. CALCULUS

    Under what conditions does |proj of a on b| = |proj of b on a| for two non zero vectors? Show why.

    asked by Abigail
  175. Chemistry. help please

    Could a Bronsted-Lowry acid not be an Arrhenius acid? Explain. Could someone explain the answer to me?

    asked by Ana
  176. Algebra

    Two varieties of herbal tea, one cost $4.00 per kilogram other cost $5.00 per kilogram. How many kilograms of each type are needed to make 20kg of a blend worth $4.60 per kilogram?

    asked by TinaG
  177. Algebra

    Chemist has 60 g of solution that is 70% acid. How much water should be added to make a solution that is 40% acid?

    asked by TinaG
  178. business stats

    A market research firm conducts telephone surveys with a 44% historical response rate. What is the probability that in a new sample of 400 telephone numbers, at least 150 individuals will cooperate and respond to the questions? In other words, what is the

    asked by chelsea
  179. Algebra

    Two kinds of nuts, one cost $5.00 per kilogram another cost $5.40 per kilogram. How many kilograms of each type of nut should be mixed in order to have 40 kg of a mixture worth $5.25 per kilogram?

    asked by TinaG
  180. algebra

    How many kilograms of pure alcohol must be added to 40 kg of a 70% alcohol solution to produce an 85% alcohol solution?

    asked by TinaG
  181. algebra

    How many kilograms of water must be evaporated from 10kg of an 8% salt solution to produce a 25% salt solution

    asked by TinaG
  182. math

    The bumper car ride at the state fair has 3 red cars, 4 green cars, and 2 blue cars. Joe is first in line for the ride and is assigned a car at random. Bill in next in line and is randomly assigned a car. What is the probability that both joe and bill will

    asked by kira
  183. Algebra

    It takes Ted 20 minutes to paint a wall. Burt can paint the same wall in 30 minutes. How long will it take for the two of them to do the job together?

    asked by TinaG
  184. Algebra

    One pipe can fill a swimming pool in 8 hours. Another pipe takes 12 hours. How long will it take to fill the pool if both pipes are used simultaneously?

    asked by TinaG
  185. biology

    A reason why 2 different species of birds in the same area might not breed with eachother is because?

    asked by Taylor
  186. math

    Solve for a: 1/a+1/b=1/c

    asked by jerson
  187. algebra

    Reported can be printed in 55 minutes by one machine. A second machine can print the report in 66 minutes. How long will it take to print the report with both machines operating?

    asked by TinaG
  188. algebra

    Kim can mow the greens at golf course twice as fast as I can. Working together, we can mow them in four hours. How long will it take me to mow the greans alone?

    asked by TinaG
  189. geometry

    perimeter of right triangle equals 1400 and hypotenuse equals 600 how do you find out what legs measure

    asked by babs
  190. algebra

    High speed copier works three times as fast as a regular copier. When both copiers are used, they can copy a group of documents in 12 minutes. How long would each copier require to do the copying alone

    asked by TinaG
  191. Macroeconmics

    to raise funds at providing more support for public schools,a state government has just imposed a unit excise tax equal to $4 for each monthly unit of telephone services sold by each telephone company operating in the state. The diagram below depicts the

    asked by Sue
  192. algebra

    Mike can assemble a computer table in 40 minutes and I can do it in 60 minutes. If Mike works for 20 minutes before I join him, how long will it take us to finish?

    asked by TinaG
  193. science

    What mass of water will give up 230 calories when its temperature drops from 80°C to 53°C?

    asked by Anonymous
  194. History

    How did the minority groups’ struggle for civil rights begin in the 1950s? Which event from this time do you think was most responsible for bringing public attention to the American Civil Rights Movement? Explain why you selected this event. o Respond to

    asked by Happy school
  195. Macroeconomics

    to raise funds at providing more support for public schools,a state government has just imposed a unit excise tax equal to $4 for each monthly unit of telephone services sold by each telephone company operating in the state. The diagram below depicts the

    asked by Sue
  196. Simple Chem Question: Please Answer

    I can't remember if the reactant always on the left side and the product on the right side? 1 Ex: CaO + H2O arrow Ca(OH)2 2 Ex: 2NaHCO3 arrow Na2CO3 + H2O + CO2

    asked by Anonymous
  197. accounting

    what is the percentage of 600000 tha equals 120000

    asked by revonda
  198. math

    20 divided 2 minus 24 divided by 3 equals ? No parenthesis

    asked by Zach
  199. geography

    Where does lake Tanganyika lie? The Eastern border of-----. Democratic Republic of the congo. is my answer right?

    asked by natalie
  200. business

    Before the UCC and the UCITA, what was one of the first, and most significant, of the U.S. government's attempts to promote uniformity in commercial laws from state to state? (Hint: think of commerce and Constitution.) Based on the information presented

    asked by Anonymous
  201. Algebra

    How do you find the roots to x^2-6x+3

    asked by KR
  202. algebra

    Kim can mow the greens at golf course twice as fast as I can. Working together, we can mow them in four hours. How long will it take me to mow the greans alone?

    asked by TinaG
  203. world history

    how did president wilson use russia's revolution in march of 1917 to gain support for the war?

    asked by Anonymous
  204. Math

    What is 2x + 6y = 12? I need to find y, the slope, and the y-intercept. Please help!

    asked by Daniel
  205. Biology

    Why must muscels cross a joint to be involved in bodily movement?

    asked by Sam
  206. chemistry

    1.0 of a 4.0 solution is added to water so that the final volume is 8.0 .

    asked by tasha
  207. Chemistry

    How many grams of liquid water can be solidified by the release of 0.75kJ of heat? Would the first step be (0.75 kJ)(1 mol/6.01 kJ) ?? Thanks

    asked by Anonymous
  208. pre-cal

    Use logarithms to solve log 8 / log x < 1. I understand that there are 2 cases: when x is negative or positive. I don't understand how it affects the answer though.

    asked by mike
  209. Math

    How do I do 6y/5x + 3y/10?

    asked by Daniel
  210. algebra

    Reported can be printed in 55 minutes by one machine. A second machine can print the report in 66 minutes. How long will it take to print the report with both machines operating?

    asked by TinaG
  211. calculus

    What conditions must be satisfied by vectors u and v for this to be true? |u + v| >|u - v|

    asked by Abigail
  212. algebra

    It takes Ted 20 minutes to paint a wall. Burt can paint the same wall in 30 minutes. How long will it take for the two of them to do the job together?

    asked by TinaG
  213. algebra

    How many kilograms of water must be evaporated from 10kg of an 8% salt solution to produce a 25% salt solution

    asked by TinaG
  214. Calculus

    Find the Taylor polynomialof order 5 appoximation to sin(1.5)

    asked by rob55
  215. math

    Y^2-4y+3/y^2-9*4y+12/y2-2y+1= 16y^4+36/2y^5+8 check this please

    asked by Elaine
  216. algebra 2

    Two snow resorts offer private lessons to their customers. Big Time Ski Mountain charges $5 per hour plus $50 insurance. Powder Hills charges $10 per hour plus $30 insurance. For what number of hours is the cost of lessons the same for each resort?

    asked by Anonymous
  217. Math Analysis

    Can someone check my answers please? Thank you! If tan x = 3/5, evaluate: 1) tan 2x 2) tan 3x ==> For #1, I got 15/8; for #2, I got -99/5. Are these answers correct?

    asked by Emily
  218. Physics

    Two projectiles are launched from ground level at the same angle above the horizontal, and both return to ground level. Projectile A has a launch speed that is twice that of projectile B. (Sketch trajectories of projectiles). Assuming that air resistance

    asked by Christy
  219. consumer math

    Nadia bought 200 shares of stock at 34 1/2. She had to pay a 1% commission to her broker. What was the total price of the stock?

    asked by peaches
  220. Calculus

    If tanh(x)=24/25, find the values of the other hyperbolic function at x I was able to find coth(x)=25/24, but what is sin, cos, csc, and sec? I would greatly appreciate your help!!

    asked by Sarah
  221. consumer math

    Serina bought 300 shares of stock at 24 1/2. She had to pay a 1% commission to her broker. What was the total price of the stock?

    asked by peaches
  222. geography / 8 grade

    Where do most of the people in the countries of southasia live? village. correct? thanks..

    asked by natalie
  223. College Chemistry

    For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it. A chemist runs a second order reaction of A->B starting at 10mili moles/L concentration of A (and no B). After one hour the

    asked by Sarah
  224. consumer math

    Trisha earns $17,500 per year. If she has 30% withheld for deductions, what is the net amount of her biweekly paycheck?

    asked by peaches
  225. Algebra 2

    Solve the inequality 12+4x>16 and graph the solution set.

    asked by Danielle
  226. Chemistry

    How much heat is lost when 12.4 g of H2O g at 110 degrees C are converted to liquid at 50.0 degrees C? (The specific heat of steam is 2.02 J/g degrees C. Could someone write the steps? Equation?

    asked by Anonymous
  227. consumer math

    Guy paid $3.59 for a 10-ounce bag of cookies. What was the unit cost per pound?

    asked by peaches
  228. math

    nick had 1 3/4 gallon of milk. how many pints of milk does nick have?

    asked by alex
  229. maths

    Ryan has the numbers 1–30 listed on individual index cards. If Ryan randomly selects 1 card, what is the probability that it will be a multiple of 3 or a multiple of 11?

    asked by venki
  230. chemistry

    a mixture of 3 gases a, b and c is at a total pressure of 6.11 atm the partial pressure of gas a is 1.68 atm, that of gas b is 3.89 atm. what is the partial pressure of gas c?

    asked by jordan
  231. 11th grade

    write an expression that represents the width of a rectangle with length x+5 anmd area x to the 3 power + 12x to the 2nd power+ 47x+60

    asked by Anonymous
  232. consumer math

    Jim paid $3.99 for a 14-ounce bag of cookies. What was the unit cost per pound?

    asked by peaches
  233. Algebra 2

    Find the values of the 30th and 90th percentiles of the data 18, 9, 7, 5, 11, 7, 17, 20, 19, 2, 17, 12, 5, 1, 13, 12, 11, 15, 16, 20 * 30th percentile = 9 90th percentile = 20 * 30th percentile = 9 90th percentile = 19 * 30th percentile = 11 90th

    asked by Skye