Questions Asked on
October 18, 2007

  1. CHEM

    Help on part "c": The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O. a)What is the molarity of the stock solution of luminol? anwer I got: molarity of luminol

    asked by K
  2. Chemistry

    "Would you expect each of the following atoms to gain or lose electrons when forming ions? What ion [cation/anion] is most likely in each case?" Followed by a short list of elements such as Na and Sr. What I'm wondering is how I'm to know? I can't find

    asked by Jack
  3. COLLEGE PHYSICS

    a 58kg skier is coasting down a 25degree slope with a kinetic friction force of 70N. initial speed is 3.6 m/s and distance traveled is 57m. find final velocity? i need some help on this i don't know where to start. i know W=F x cos theta x distance is the

    asked by natali
  4. Physics

    A candle is placed 17.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 6.0 cm farther away from the mirror. Find the focal length of the convex mirror. _______cm

    asked by Mary
  5. CHEM

    Help on part "c": The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O. a)What is the molarity of the stock solution of luminol? answer I got: molarity of

    asked by K
  6. COLLEGE PHYSICS

    A 1100kg car starts from rest, accelerates for 5 seconds. The magnitude of acceleration is (a)= 4.6m/s2. find the average power generated by the net force that accelerates the vehicle? what do i do here i know that F=ma= 1100x4.6=5060=F and Wnet =

    asked by natali
  7. Physics

    Someone please help me, I am having the worst time understanding this problem. Where do I begin? Atomic physicists ignore the effect of gravity within an atom. To see why, calculate and compare the gravitational and electrical forces between an electron

    asked by Olivia
  8. calculus

    The diagonal of a square is increasing at a rate of 3 inches per minute. When the area of the square is 18 square inches, how fast(in inches per minute) is the perimeter increasing?

    asked by ssss
  9. Physics

    Could someone help me on how to put this all together. Atomic physicists ignore the effect of gravity within an atom. To see why, calculate and compare the gravitational and electrical forces between an electron and a proton separated by 10-10m. Im

    asked by Olivia
  10. relative velocity please help exam tom.

    the paper delivery boy tires to throw the paper ubti your narrow driveway without slowing down. his pickup truck travels at 10 mph and he throws the paper at 20 mph just as the truck passes the drive way. a) in what direction should he throw the paper in

    asked by candance
  11. Economics

    An Arizona student claims to have spotted a UFO over the desert outside of Tucson. How will his claim affect the supply (not the quantity supplied) of binoculars in Tucson stores?

    asked by Nickey
  12. science

    one pound is the same as 4.45newtons what is the weight in pounds of 1 newton

    asked by LiSa
  13. calculus

    a spherical snowball with diameter 4 inches is removed from the freezer in June and begins melthing uniformly such that it is shrinking 2 cubic inches per minute. How fast ( in square inches per minute) is the surface area decreasing when the radius is 1

    asked by ssss
  14. Earth Science

    1.A trench is associated with which plate boundaries. Oceanic-oceanic convergence, hot spot, divergent boundary, oceanic-continental convergence, continental-continental convergence. My answer is divergent boundary. Is this correct? 2. A rift valley

    asked by Camron
  15. physics

    a high speed sander has a disk of 2.74 cm in radius that rotates its disks about the axis at a constant rate of 503 rev/min. determine the linear speed of a point 2.33 cm from the disk's center. answer in units of m/s

    asked by Will
  16. Finance

    An AT&T bond has 10 years until maturity, a coupon rate of 8 percent, and sells for $1,100. a. What is the current yield on the bond? b. What is the yield to maturity?

    asked by Wendy
  17. physics

    A satellite has a mass of 5850 kg and is in a circular orbit 3.8 105 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.15 106 m. What is the true weight of the satellite when it is at rest on the planet's

    asked by Taylor
  18. Economics

    How will a new law mandating an increase in required levels of automobile insurance affect the equilibrium price and quantity in the market for new automobiles?

    asked by Nickey
  19. Physics

    The image produced by a concave mirror is located 28 cm in front of the mirror. The focal length of the mirror is 14 cm. How far in front of the mirror is the object located? _________cm

    asked by Mary
  20. microeconomics

    Suppose a firm produces output using the technology Q=K1/3 L2/3 Find a. The long run cost function b. The short run cost function if capital is stuck at 10 units. c. The profit maximizing level of output as a function of the price of the good, wages,

    asked by janet
  21. Physics

    Four penguins are being pulled along very slippery (frictionless) ice by a curator. The masses of the three penguins are given below and so are two of the tensions. Find the penguin mass that is not given. 12kg---Unknown--111N--15kg---20kg--222N After

    asked by Jenn
  22. Physics

    A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2 seconds later. If the speed of sound is 340 meters per second, how high is the cliff?

    asked by Lucie
  23. Geography

    What was the importance of Marco Polo's travels to the whole of the age of Exploration? Would like to know different levels of things he did

    asked by Cecilia
  24. psychology-Libet Study

    In the Libet et al. study (1983) that asked participants to flex their wrist and record when they decided to flex it, a. people were not very accurate in determining when they actually moved their wrist b. the results suggested that the brain started to

    asked by Melissa
  25. Chemistry

    a) Explain why a bottle of pop goes "flat" if left open to the air. b) Would keeping the bottle warm help the soda to stay fizzier longer? Explain.

    asked by Dick Rogers
  26. Science

    How do you balance this equation? C+S8=>CS2

    asked by Shauna
  27. Business

    I need help with the follwoing persuasive business letter. Pretend that you are the newly hired business manager for the San Diego Zoo, in charge of securing group tours. You will have to plan two business messages. The first is to convince the

    asked by Mike
  28. International Finance

    what is the general formula for figuring out this question? If the dinar devalues against the US dollar by 45%, the US dollar will appreciate against the dinar by...? I'm not getting this at all, and the book is not helping!!

    asked by Annie
  29. Physics

    At the entrance channel of a harbor, the tidal current has a velocity of 4.94 km/hr in a direction 23.2° south of east. Suppose a ship caught in this current has a speed of 15.6 km/hr relative to the water. If the helmsman keeps the bow of the ship aimed

    asked by Lindsay
  30. math

    the absolute value of a certain integer is greater than 3 and less than 6. which of the following could not be 2 less than the integer? A)-7 B)-6 C) 2 D) 3 E) 4

    asked by Tami
  31. science

    how is the periodic table connected to science? how is the periodic table connected to math? how is the periodic table connected to the world? how is the periodic table connected to you? why is the periodic table important?

    asked by need help
  32. Economics

    Use supply and demand analysis to explain why hotel room rental rates near your campus during parents’ weekend and graduation weekend might differ from the rates charged during the rest of the year.

    asked by Nickey
  33. math

    A 30-second advertisement on a local television station during prime time costs the advertiser $1,280. To the nearest cent, how much does the ad cost per second? will you help me with step by step instructions

    asked by mackenzie
  34. science-physics

    You walk 15 m south and 35 m east. Find the magnitude and direction of the resultant displacement both graphically and algebraically. What's the ° (counterclockwise from east)?? Well I tried using tan=15/35 the degrees ended up being 23 degrees which was

    asked by ashley
  35. Reading

    Is lady or lunch lady a proper noun in the following sentence? The lunch lady told me that I had to pay three dollars.

    asked by Tyler
  36. math ( average)

    a student wants to get an average of 80 on the 5 tests to earn an A grade.on the 4 test he gets 79, 88,64,78. how much should he score on the 5th test so that he gets this average of 80?

    asked by sasha
  37. math

    A bag contains 2 white marbles, 4 blue marbles, and 5 red marbles. Three marbles are drawn from the bag. What is the probability that not all of them are red?

    asked by Anonymous
  38. economics

    Suppose the price of apples rises from $3.50 a pound to $4.00 and your consumption of apples drops from 30 pounds of apples a month to 20 pounds of apples. Calculate your price elasticity of demand of apples. What can you say about your price elasticity of

    asked by Anonymous
  39. math

    a4.a6

    asked by candi
  40. Algebra II

    Identify the graph of the solution set of 8.5>6.1 +0.6y. Would the answer be all numbers 4 and greater? Thanks.

    asked by Lucy
  41. Flash-card maker?

    Does anybody know of an online flashcard maker you don't have to print out that you can study online? Americangirl . com has a flash-card maker, but it doesn't work anymore.

    asked by Emily
  42. To all tutors

    Not sure if my response came through before - just wanted to say thank you for the quick response and keep up the good work :) ttfn - Canadian Student

    asked by Karen
  43. calculus

    dy/dx= (2x-2xy)/(x^2+2y) Find all points on the curve where x=2. Show there is a horizontal tangent to the curve at one of those points.

    asked by ssss
  44. REPOST--Statistics

    Ten cards, the 2 through 6 of spades and the 2 through the 6 of diamonds, are shuffled thoroughly and then taken one by one from the top of the deck and placed on the table. I know how to solve the first question (I think), but how would I solve the second

    asked by Anonymous
  45. Physical science

    In my tenth-grade-level physical science class, we're studying heat, and I completely don't get it. I'll read the definition for specific heat over and over, and I still don't understand it. "For all substances, specific heat is a characteristic physical

    asked by Devon
  46. IB PHYSICS

    An object in equilibrium has three forces exerted on it. A 30 N force acts at 90° from the x-axis and a 44 N force acts at 60° from the x-axis. What are the magnitude and direction of the third force? NO IDEA WHERE TO START

    asked by MELANA
  47. Algebra II

    One number is two less than a second number. If you take one-half of the first number and increase in by the second number, the result is at least 41. Find the least possible value for the second number. HELP PLEASE!!!! I hate word problems!!!

    asked by Lucy
  48. COM 215

    What are the main differences between your hardcopy and online submissions? i mean as far as resumes go

    asked by dawn
  49. Economics

    Hi, I need help with these four questions can anyone help me, it is for my economics class. 1)How does the economic (or rational decision-maker) approach to criminology work with or against other criminology theories? 2)Suppose we know that Frank has

    asked by Andy
  50. Psychology/Science

    Ms.Sue you helped me with the pictures of neurons yesterday. Thank you, I finally found some really good ones for my power point presentation. My assignment is to create a lesson plan for a sixth grade science class explaining what a neuron is and how it

    asked by Christian
  51. math

    r+1 is less than or equal to 0. What is r?

    asked by ayan
  52. Physics

    At the entrance channel of a harbor, the tidal current has a velocity of 4.94 km/hr in a direction 23.2° south of east. Suppose a ship caught in this current has a speed of 15.6 km/hr relative to the water. If the helmsman keeps the bow of the ship aimed

    asked by Lindsay
  53. Math

    7a-8=15a+8

    asked by Anne
  54. French

    I want to know what are the Ils/Elles form for the following verb. S'appeler Avoir Adorer Vouloir

    asked by Miche
  55. physics

    A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 104 m/s, and the radius of the orbit is 5.50 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has

    asked by Taylor
  56. BIOLOGY/EARTH SCIENCE

    Hi, I was just wondering how an eroding dune and a non-eroding dune would differ, in terms of diagrams. For example, is there any site that would compare two cross-sectional shapes of the dunes? I couldn't find any on google.

    asked by Kelly!
  57. phsyics

    Posted by MELANA on Thursday, October 18, 2007 at 5:14pm. An object in equilibrium has three forces exerted on it. A 30 N force acts at 90° from the x-axis and a 44 N force acts at 60° from the x-axis. What are the magnitude and direction of the third

    asked by MELANA
  58. Economics

    Use supply and demand analysis to explain why hotel room rental rates near your campus during parents’ weekend and graduation weekend might differ from the rates charged during the rest of the year.

    asked by Nickey
  59. Statistics

    Ten cards, the 2 through 6 of spades and the 2 through the 6 of diamonds, are shuffled thoroughly and then taken one by one from the top of the deck and placed on the table. How many arrangements are possible? What is the probability that each card is next

    asked by Anonymous
  60. Economics

    suppose you have a factory that makes pens and the demand for the pens decline, and there are more people willing to work due to a recession. does this result in an increase in supply? please explain

    asked by Anonymous
  61. Math

    I am in dire need of assistance. Can anyone tell me the forumula/solution to transforming inqualities into equivalent inequalities with y alone on one side? I really don't understand this.

    asked by Krys
  62. egyptian mummies

    what was the prince of the dead?

    asked by mmmmmmm
  63. Economics

    could some explain what will happen from a supply/demand side if factory that makes pens and the demand for the pens decline, and there are more people willing to work due to a recession.

    asked by Myke
  64. Reiny

    Thanks - How many pecks in a bushell - and don't ask anyone else for the answer - only Canadians would know this.

    asked by Karen
  65. Psychology-24Hour Cycle

    Our tendency to feel wakeful and sleepy on a 24-hour basis depends mainly on a. a cycle generated by a mechanism in the brain b. our perception of environmental stimuli such as heat and light c. a cycle generated by hormone-producing organs such as the

    asked by Melissa
  66. Economics

    If I have a business in producing books and the demand decrease at the same time there is a recession and I have more people willing to work. I'm assuming that my product will be less demanded and my supply will increase because more people are willing to

    asked by Myke
  67. economics

    Suppose you have $30,000 in wealth and have the choice of two possible gambles: Gamble 1: a single flip of a coin would pay you $16,000 if it is heads, cost you $16,000 if it is tails. Gamble2: two coin flips, each payuing you $8,000 if it is head, each

    asked by sara
  68. U.S. History

    I'm have to do a essay about why the Second Amendment is important to us. I need some help writing it. Has to be at least 1000 words.

    asked by Wenmar
  69. business

    What is the difference between an LLC, Conventional corp, amd S. Corp?

    asked by fran
  70. History

    Why did Jefferson as the Democratic-Republican candidate win the election of 1800? -Clearly stated thesis -Identify and describe 3 factors that influenced the outcome of the election -A conclusion that pulls the ideas together

    asked by Matthew
  71. english

    I need to write 2 process essays. Any good ideas? I know there's so many things I can do, but it's hard to come up with a good one.

    asked by Mischa
  72. Chemistry

    can anyone help me on my chemistry problem. i need a merck index to solve this. i have a PH of 10.7 and the nearest solution that is near to it is 10.32. The solution that is 10.32 is NaHCO3. i subtract both of them to get the ratio of log (HA)/(A-). i

    asked by Chris
  73. Geometry

    Given: line segment AD is congruent to line segment CD,

    asked by Kim
  74. math

    if absolute value of x-6 is greater than or equal to 4 which of the following must be true? A) absolute value of x > 10 B) x > 10 C) x < 2 D) x > -2 E) none of the above

    asked by Tami
  75. science

    How do I design a graph that shows the ratio or proportion of metal,metalloids,and nonmetals that are on the periodic table

    asked by Bianca
  76. Managerial finance

    Can u please help me on this: High cash flow is generally associated with a higher share price whereas higher risk tends to result in a lower share price. is it true of false?? and why thx

    asked by Natacha
  77. Biology

    What's high specific heat is mainly a consequence of the: A) high specific heat of oxygen and hydrogen atoms B) inability of water to dissipate heat into dry air D) absorption and release of heat when hydrogen bonds break and form E) fact that water is a

    asked by J
  78. Social Studies Repost for Kim

    social studies - Kim, Thursday, October 18, 2007 at 8:50pm What 3 states come together where the Ohio River joins the Mississippi River?

    asked by Ms. Sue
  79. Geography

    What Country lies to the East of Alaska? Why was Alaska a good addition to the United States?

    asked by Cecilia
  80. essay again

    i'm so sorry i'm posting the same thing over and over again. this is my whole essay except the conclusion. can you please read it all together and see what i can add more please. Festival of Colors India is known as a land of diversity because of its many

    asked by apoorva
  81. Spanish I

    I'm taking a Spanish class now, but I cannot figure out how to roll my r's. Could somebody try to explain to me how to do that? :-)

    asked by Emily
  82. math

    In an extra-sensory-perception experiment, a blindfolded subject has two rows of blocks before him. Each row has blocks numbered 1 to 10 arranged in random order. The subject is to place one hand on a block in the first row and then try to place his other

    asked by Anonymous
  83. english

    what is an interrogative statement?

    asked by fraser
  84. ENGLISH

    Through their guidance and love, they have changed me in many ways. Is the above sentence grammatically correct? Thanks! :]

    asked by Julie
  85. physics

    We have to use simple machines to light a fire and put it out using only one force. ( turn a crank, pull a string ,ect.) Me and my partner have one idea but it hasn't worked so far. any ideas?

    asked by April
  86. Summary of The Necklace?

    I've been searching online for a short but informative summary on the book "The Necklace" by Guy de Maupassant. Does anybody know where I can find it? Thanks! =)

    asked by Emily
  87. psych-Awake/Asleep

    3. Our tendency to feel wakeful and sleepy on a 24-hour basis depends mainly on a. A cycle generated by a mechanism in the brain b. Our perception of environmental stimuli such as heat and light c. A cycle generated by hormone-producing organs such as the

    asked by Melissa
  88. Psychology-JetLag

    After staying awake late many nights, Glorida has become accustomed to going to sleep late and awakening late. Now she tries to shift going to bed earlier and waking up earlier. This shift is similar to difficulties people face when they travel a. north b.

    asked by Melissa
  89. thesis revision

    While the colors associated with Holi are the main part of this celebration, the true reason for celebrating Holi is to keep the evil spirits away. Not only is Holi a joyous, colorful festival to celebrate with friends and family, but it is also meant to

    asked by apoorva
  90. Math

    The length of a rectangle is 14 centimeters less than twice its width. The perimeter of the rectangle is 62cm. What are the dimensions of the rectangle? Here is what I did: P=2L+2W 62=2(14-W)+2W 62=28-W+2W 28-28 ------------ 34=-W+2W +W +W ------------

    asked by Marie
  91. Algebra

    When you have to graph a set of 14 numbers from 15 to 210,000 on graph paper, how do you decide what intervals to use for the graph when you only have 7 lines?

    asked by harrison
  92. world history

    who is isaac newton?

    asked by kelly
  93. French

    What is the difference between "Elle aime la danse" and "Elle aime danser" ?

    asked by Miche
  94. Science

    The equation is HCl+Na OH-NaCl+H2O (water)

    asked by Shauna
  95. Chemistry - Solutions

    Can the term hydration be applied to the solvent carbon tetrachloride? Explain your reasoning. If it cannot be used, what term can?

    asked by Dick Rogers
  96. earth science repost!!!

    Hi, I was just wondering how an eroding dune and a non-eroding dune would differ, in terms of diagrams. For example, is there any site that would compare two cross-sectional shapes of the dunes? I couldn't find any on google.

    asked by Kelly!
  97. Writing

    In the following sentence is I a propernoun? Sometimes I act fickle when I am deciding what to eat or drink.

    asked by Tyler
  98. Writing

    What is the difference between a common noun, proper noun, possessive noun and pronoun?

    asked by Tyler
  99. History

    Why did Jefferson as the Democratic-Republican candidate win the election of 1800?

    asked by Matthew
  100. TX History

    Just want to be sure on this... are Tejanos english settlers from mexican decent?

    asked by leslie
  101. social studies

    what are the 3 discoveries of america

    asked by caprie
  102. Algebra II

    Having trouble factoring 3x^9- 75x

    asked by Marie
  103. math

    if g(t)=4+square root of 9-t, what is the smallest possible value of g(t) A) 0 B) 3 C) 4 D) 5 E) 9

    asked by Tami
  104. U.s. history 2

    How did WW2 influence the United nations? How did this affect its structure?

    asked by Erika
  105. math

    About how long does it take to get to Balmorhea,Texas from El Paso,Texas?

    asked by keke
  106. inglish

    can you show me pictures that start with the leter A?

    asked by Johnathan
  107. For all tutors

    Is this just an American website. I am from Toronto Canada - posted a question yesterday and have not received a response. Just checking. Thanks.

    asked by Karen
  108. Science.

    Explain the atomic structure

    asked by Roseana.
  109. please revise my paragraph

    The celebration of Holi only takes place for a week, but the preparations for various events begins almost forty days before the festival. One of the main events during this week is when everyone goes to a temple and performs a ritual to represent the

    asked by apoorva
  110. Biology

    Why can carboxyl and phosphate groups act as acids?

    asked by J
  111. math

    Ronald made a trip of 450 miles in 8 hours. Before noon he avg. 60 miles per hour, and after noon he avg. 50 miles per hour. At what time did he begin his trip and when did it end?

    asked by Cecilia
  112. Reiny

    Thanks - How many pecks in a bushell - and don't ask anyone else for the answer - only Canadians would know this.

    asked by Karen
  113. Biology

    General question: do polypeptides only make up proteins and not carbohydrates? and can they be formed by dehydration synthesis?

    asked by J
  114. chemistry

    Why isn't sucrose an electrolyte

    asked by gar
  115. science

    i am doing a particle movement stuy sheet and i need to knoe if gas is compressed(push) then what is the distance

    asked by cee
  116. science project

    i need help comeing up with a question for my topic? topic:how do perservitives affect the growth of microorganism? Question:??

    asked by dani
  117. Math

    1/5x-12=22 No answer please just walkthrough process

    asked by Anne
  118. business

    I need some ideas on how General Motors can gain market share, what are some of the recommandations for them. Thanks.

    asked by janice
  119. Science

    How do balance an equation?

    asked by Shauna
  120. woodworking

    what the advantages and disadvantages of all the Joints.

    asked by Kemar
  121. AP CHEMISTRY

    STATE THE HEISENBERG UNCERTAINTY PRINCIPLE AS IT RELATED TO THE DETERMINING THE POSITION AND MOMENTUM OF AN OBJECT.

    asked by KELLY
  122. Ecomomics

    Hi, I need help with these four questions can anyone help me, it is for my economics class. 1)How does the economic (or rational decision-maker) approach to criminology work with or against other criminology theories? 2)Suppose we know that Frank has

    asked by Andy
  123. French

    This is from my text. It says : C'est delicieux, les pommes." But les pommes is feminine, so should it be delicieuses instead?

    asked by Miche
  124. English

    I have to write a concise precis of a short story that I read, consisting of 130 words. What is a 'precis'?

    asked by Annika
  125. Geography

    If you go East from Madagaser what is the first continent will you run into?

    asked by Cecilia
  126. Science

    How can I design a study guide to use when studying the periodic table?

    asked by Bianca
  127. Simple machines: physic science

    We have to use simple machines to light a fire and put it out using only one force. ( turn a crank, pull a string ,ect.) Me and my partner have one idea but it hasn't worked so far. any ideas?

    asked by April
  128. REPOST biochem

    i don't understand this why can carboxyl and phosphate groups act as acids? as in, what makes an acid?

    asked by J
  129. world history

    what were all of Isaac Newton's inventions or discoveries?

    asked by kelly
  130. Chemistry - Solutions

    What do all solutions of electrolytes contain that solutions of non-electrolytes don't contain?

    asked by Dick Rogers
  131. world history

    im not aloud to use wikipeida

    asked by kelly
  132. Science

    What would be the likely function of a plant cell containing many chloroplasts?

    asked by K
  133. social studies

    what exactly is federalism?

    asked by little