1. History

    Hello, I really need help i used another site and they gave me the wrong help and now i have a really low grade. i have 10 questions 1- Jericho's status as the first city with a wall indicates that A-it was the first city built during old stone age B-it
  2. conjectures

    I'm finishing my math 20 Pure. This is my last 20 course then i have 30's. Also I have to work a full time job so that I can live on my own with my boy. So it is tough but I'm doing alright. What about you? wow, okay i have no idea what all that is but
  3. Physics

    A frustrated hockey player, at rest on a frictionless ice rink, throws his stick into the crowd. Since you don’t normally go to hockey games, you decide to turn this into a physics problem and calculate the mass of this player. You observe that the stick
  4. help me to construct this in a good essay

    English 101AYR has now been in session for four weeks. In at least one full screen (one paragraph rather than an essay), answer the following question: Has your opinion about hybrid courses changed from day one to today? If yes, in what ways has it
  5. physics

    A car travelling at 60 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 67 cm (with respect to the road) while being brought to rest by an inflated air bag. What force (assumed constant) acts on the passenger¡¦s upper
  6. Physics-Please check

    I posted this question this morning but I'm not sure of the response Damon provided. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction
  7. Physics/Algebra

    Physics: For a 225-watt bulb, the intensity I of light in lumens at a distance of x feet is I=225/x^2. a. What is the intensity of light 5 ft from the bulb? b. Suppose your distance from the bulb doubles. How does the intensity of the light change?
  8. physics As

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says:
  9. Science

    Daltons idea that atoms cannot be divided into smaller parts was was disproved by the discovery of______? The description of the structure of the atom is called the________? In a water molecule, two atoms of hydrogen and one atom of oxygen shared
  10. Chemistry --Need Help!!

    Ive posted twice, but no one's answered yet...I could really use any kind of guidance--particularly for the 1st question :) 1)) The following two half-cells are paired up in a voltaic cell. How will lowering the pH affect the ƒ´E of the overall cell?
  11. physics

    A 2 kg rock is released from rest at a height of 29 m. Ignore air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights;20m 15m 9m * physics - bobpursley, Wednesday,
  12. Diamond?

    I recently received agorgous "diamond" ring as a gift. He said it was real but I'm not sure. It looks real, the four Cs and everything. But to know for sure without it being apraised I need to know what the stamps inside mean. GF"A" Does anyone have an

    What type of bonding holds the compound, sodium cyanide, together? The CN bond is covalent. The Na to CN bond is, in most minds, an ionic bond. The electronegativity of C is about 2.1 and that of Na is about 1; therefore, with a difference of about 1 it is
  14. Physics Repost

    Hey, ok so I am supposed to be helping my cousin this with this physics problem, and this is the only one that has ever stumped me! Neutral metal spheres A and B each of mass 0.2 kg hang from insulating wires that are 4.0 m long and are initially touching.
  15. English lit

    Have writers block. Need help with Julia Alvarez poem!? I have to write a 1000 word analysis of the Julia Alvarez poem "Ironing Their Clothes". I need help with a thesis. I have no idea what to write about! 1 year ago Additional Details With a hot glide
  16. pre-cal

    find all solutions in interval [0,2pi] tan²x = -3/2 secx This question may look tricky, but its actually quite simple. First: rearrange the pythagorean identity tan²x+1=sin²x so that it reads tan²x=sin²x-1 Then replace the tan²x in the original
  17. Science

    Here are the other sentences on the same theme I urgently need you to check. I hope you can help me. Thank you. 1) The existence of complex molecular structures present in every living system is used by Drexler to show the theoretical possibility of the
  18. English

    Can you check for the last time if everything is correct? Thank you very much in advance!!! The poem is narrated by the mirror and has a balanced structure with two verses mirroring each other. This emphasizes the idea of the first stanza, which describes
  19. speech

    I am running for team captain on the tennis team and I have to make a speech on Monday so I was wondering if anybody had any ideas on how I persuade people to vote for me and how to make the speech convincing and attention-grabbing. It is going to be
  20. 7th Grade Civics Help Please

    I have a few questions with a multiple choice answers that I do not understand. Can someone please explain it to me more clearly than my lesson is doing? Any answer that I think I know I will surely put asterisk by. 1. Article IV, Section 2 of the U.S.
  21. norwalk

    historical events of daoism IV History of Daoism Print this section Daoism gradually changed from the philosophy of a small number of sages to a widespread popular religion followed by numerous individual believers and by many groups of monks and lay
  22. Physics need work checked

    Physics lenses. Please help, my math is wrong and I need second opinion.? Consider three lenses with focal lengths of 25.9 cm, -15.8 cm, and 10.0 cm positioned on the x axis at x1 = 0 m, x2 = 0.412 m, and x3 = 0.514 m, respectively. An object is at d =
  23. physics

    from what height should you drop your physics textbook so that it takes 0.2 seconds for it to fall? ftom what height would you drop a baseball so it takes 0.2 seconds for it to fall?
  24. English writing an e-mail

    please check this for me thanks very much. I need to write write an e-mail based on the following scenario (create it as a regular Word document , rather than as a"real" e-mail. Your boss has asked you to set up a meeting with a client, Joceyln Talbot, for
  25. physics

    you push a physics book 1.50m along a horizontal tabletop with a horizontal push of 2.40 N while the opposing force of friction is 0.600 N. How much work does each of the follwing forces do on the book? A) you 2.40N push. B) the friction force. C) the
  26. Physics

    I have to write questions for our California Standards for Physics, like we're making our own 50-question test. Standard 1a: Students know how to solve problems that involve constant speed and average speed. Two questions: do you think this standard needs
  27. Dr.Bob the question Ihad reposted (NOT the old one

    Yes...another calculation problem. Rxn: 1ml isopentyl alcohol + 1.5ml glacial acetic acid + 3 drops sulfuric acid=> isopentyl acetate to calculate the theoretical yield.. I know that the acetic acid is in excess but how would I calculate the theoretical
  28. Excel VBA

    (I have no idea what to do I've asked our professor for help with this numerous times he refuses please help, I know how to make input boxes and a command button but that is it) (1) When an object is thrown into the air it exhibits what is called
  29. Please help..

    Hi, I got stuck on a few questions, do you mind helping me? What was George Washington's belief about U.S. foreign policy? a.The United States should form a strong alliance with France. <? b.The United States should remain neutral. c.The United States
  30. Physics- repost

    Posted by jude on Saturday, February 6, 2010 at 2:20am. Given a square of sidelength a = 5 cm. We place a charged particle at each corner, three of them carry + 2 nC of charge and one carries the same amount of negative charge. What is the magnitude of the
  31. English composition

    Hi, I have to write a reflection paper for my human development class. I am working with first graders in an elementary school and our professor wants to know this: Choose one thing about your practicum site that you think should be different. This can be
  32. Physics

    I'm trying to rank the maximum temperatures of water at 20 degrees Celsius after adding in heated copper cylinders. The first case is 1 cylinder at 22.5 degrees Celsius. Second is two cylinders at 25 degrees Celsius. Third is 3 cylinders at 25 degrees
  33. physics

    soo for physics, we did a lab where we launched a cart on a track on the floor and recorded time, distance, etc. to figure out things. one of the questions on the lab is: can you think of a simple follow-up experiment that would allow you to determine how
  34. Help!

    Can someone help me expand on this? From a teacher's standpoint, all trust would most likely be destroyed. Any academic value would be lost to that student from that point in time on as far as a teacher would be considered.Not only with that teacher, but
  35. English Help Plz

    Ovid is a great artist; He used different objects to represent the idea of transformations. He used water, tree, earth and heaven as metamorphosis symbolism .But his stories seems to be fiction in the modern age. For example beautiful daughter of a river
  36. english help

    I need help with these questions. The first question I have to make the language nonsexist for inclusive language. Question is The directors and their wives met the stockholders for a night on the town. Second question is making language nonsexist Question
  37. English check answers !

    1.B 2.C 3.C 4.A Read the following draft for a research paper on italian food. When you think of italian food,does your mouth always water for pizza or pasta? Actually,italian food includes a tremendous variety of dishers.These tasty morsels come from many
  38. Fundamentals of Law

    Assignment Type: Individual Project Deliverable Length: 1-2 pages Points Possible: 130 Due Date: 8/1/2010 11:59:59 PM CT Your sister has come up with what she thinks is a brilliant idea for a home-based business - a website which helps lonely people find
  39. physics - please help me!

    Hello! I'm having a bit of trouble trying to solve this physics problem. I'm not sure which equations to use or where or how to plug my variables: Robin Hood wishes to shoot an arrow through the open window of a tall castle wall. The window is 16m meters
  40. Physics

    A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction
  41. 6th grade science fair project

    Each week up until fair time we have to turn in one aspect of our project. This week it deals with our conrol, dependent and independent variables and constants. I will tell you that I got my idea form sciencebuddies. My project is Ocean Currents: Modeling
  42. English

    The book for this is The Giver. Please check my answers. Which of the following passages from the novel support the idea that the Giver is a heroic character? A. I do know that I sat here numb with horror. Wretched with helplessness. B. "Be quiet Jonas,"
  43. English

    1.Read the following Papago song. Identify the purpose. No talking, no talking. The snow is falling. And the wind seems to be blowing backwards. A. To inform B. To persuade C. To analyze D. To express 2.which of the following statements about early
  44. History

    1. Why is Lincoln giving a speech at Gettysburg? A.To declare the Confederacy an outlaw nation B.To declare that to goal of the Union is to abolish slavery C.To dedicate a national cemetery for Union and Confederate dead D.To try Confederate soldiers for
  45. Poem Help Needed

    This is a poem by John Berryman that I am supposed to analyze and I am completely confused by. If anyone has any observations or ideas about the main idea of the poem, PLEASE help me out! "The Traveller" They pointed me out on the highway, and they said
  46. english

    95. Students could learn grammatical structures from a song because A:it contains authentic language. B:rhythm and melody make the structure memorable. C: learning in this way is a pleasant change of pace. D: all of the above. answer: D 96. In a grammar
  47. physics

    hi i have a physics question i don't understand here is the question A sample of blood is placed in a centrifuge of radius 15 cm. the mass of the corpuscle is 3.0*10^-16 kg, and the magnitude of the force required to make it settle out of the plasma is
  48. physics conclusion

    im not quite sure what to write for my conclusion for this physics experiment. The aim is to record measurements and carry out calulations with the correct number of figures. We had to take a brass rod and measure its width with vernier calipers which was
  49. Physics- Circuits Current & Voltage Problem

    Please find this question onto y a h o o s e a r c h e n g i n e b y c o p y & p a s t e. Determine... (a) the current in each resistor (Indicate the direction of the current flow through each resistor through the sign of your answer. Take upward current
  50. Novel

    I've been brainstorming about the idea that Guru gave about the novel and here's what I have of the summary so far. I can't think of an ending for it though like a conclusion or even how she finds out that it's the crow. help please! Credits to GuruBlue
  51. Physics-Please check if I did this correctly

    I posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the
  52. Physics

    These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total
  53. Science: Physics

    A physics teacher shoots a .30 caliber rifle at a 0.47 kg block of wood. The rifle and wood are mounted on separate carts that sit atop an air track (like a linear air hockey table--ie. frictionless). The 5.7 kg rifle fires a 27 gram bullet at 227 m/s in
  54. english

    Writing terms. Fill in the blanks. 1-final 9-topic 2-prewiting 10-introduction 3-idea 11-homonyms 4-conclusion 12-transition 5-voice 13-rough drapht 6-conventions 14-antonyms 7-persuasive 15-synonyms 8-organization -the( )writing trait judges your ability
  55. history

    The Progressive Movement has been characterized as a movement that brought a sense of justice and morality to the American political scene between 1890 and 1917. Other historians say that although well-intentioned, in the end they failed to achieve their
  56. Physics

    A plutonium- 239 nucleus initially at rest undergoes alpha decay to produce a uranium-235 nucleus. The uranium-235 nucleus has a mass of 3.90 x 10^-25 kg and moves away with a speed of 2.62 x 10^5 m/s. Determine the minimum wage electric potential
  57. Physics

    The spring shown in the figure is compressed 59cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student's coefficient of kinetic friction on the 30∘ incline is 0.14 . k= 80,000 N/m m=100 kg
  58. History

    Which explains why the Compromise of 1850 intensified the argument about slavery? A- People for and against slavery migrated to Western stats to influence laws. B~Free states in the West added more antislavery votes to Congress. C~The equal division of
  59. English

    As promised, I just included the first five sentences I wasn't sure of. 1) One day he got to the beach and saw it was covered with human bones. He realized that cannibals had eaten men on his island. He believed that cannibals ate other men because they
  60. German

    I am not doing to good in my German class and I was wondering if anyone knew of a way I could learn outside of school? Maybe a site that teaches the basics? Or maybe someone on here that is willing to help? I really have no clue on how I can get some help,
  61. Algebra

    I think that the goal is to get rid of the 5th root in this case. I know that I have to make whatever is under or in the root -in this case the number is X equal some number to the fifth power. I am supposed to use the rule a^(m/n)= n (the n-root) (don't
  62. Maths

    - In a normal pack of cards, write down the odds against picking each card. a) a diamond b) a jack c) a red 10 d) a black picture card e) a picture card 1. A die is rolled 3 times. Estimate the chance of 2 or 3 no.'s being the same. Find the probability
  63. mathematics

    A book seller purchased 117 books out of which 45 books of mathematics and 72 books of physics.Each book has same size .Mathematics and Physics books are to be packed in bundles and each bundle must contain same no. of books.Find the least number of
  64. Intro to LAN

    I have an assignment. here is the criteria All key elements of the assignment are covered in a substantive way. · Select one organization from the company descriptions in Appendix G · Recommend how the company should back up and protect their network
  65. Novel [repost]

    I've been brainstorming about the idea that Guru gave about the novel and here's what I have of the summary so far. I can't think of an ending for it though like a conclusion or even how she finds out that it's the crow. help please! Credits to GuruBlue
  66. Help!Microeconomics

    Central Crude Oil is a crude oil monopoly in a market. The following table shows the liner demand schedule of this firm which cannot apply price discrimination. The firm's fixed cost is $2000 per month and its marginal cost is a constant of $20 per
  67. science

    I did this experiment and I found these validity issues: they never specified if temperature to be measured in celcius or faren., they never mentioned that the buckets were to be the same, stirring until your arms get tired is not a good idea, but I need
  68. science

    I did this experiment and I found these validity issues: they never specified if temperature to be measured in celcius or faren., they never mentioned that the buckets were to be the same, stirring until your arms get tired is not a good idea, but I need
  69. Physics

    The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. (a) Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed of a person situated at
  70. Physics!!!!

    3. You push your physics book 1.50 m along a horizontal table- top with a horizontal push of 2.40 N while the opposing force of friction is 0.600 N. How much work does each of the following forces do on the book: (a) your 2.40-N push, (b) the friction
  71. math

    In a class of 50 student, 25 offer mathematics, 22 offer physcis, 30 offer chemistry and all the student take at least one of these subjects , 10 offer physics and mathematics, 8 offer chemistry and mathematics , 16 offer physics and chemistry. (a) draw a
  72. Physics

    A hockey puck of mass m = 70 g is attached to a string that passes through a hole in the center of a table, as shown in the figure below. The hockey puck moves in a circle of radius r = 1.20 m. Tied to the other end of the string, and hanging vertically
  73. Physics (my last problem)

    A 3.4 kg ogject to the right at 3.5 m/s hits a stationary object of mass 2.7 kg. After the collision the 2.7 kg object moves to the right at 1.8 m/s. A) What is the final verlocity of the 3.4 kg object? B) What is the total kinetic energy og the objects
  74. physics

    The flywheel of a steam engine runs with a constant angular speed of 164 rev/min. When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 1.6 h. I figured out the constant angular acceleration=1.71 rev/min2 but im not
  75. physics

    In a physics lab, students are asked to predict how the acceleration of the block sliding up a ramp compares to the acceleration down the ramp compares to the acceleration down the ramp. The block slides up a somewhat rough surface inclined at an angle of
  76. Economics

    6. The idea that countries should produce and sell goods that they produce most effectively and efficiently, and buy goods that other countries produce most effectively and efficiently, is known as A. absolute advantage theory. C. efficiency balanced
  77. English

    I still have some doubts about a summary I made of Macbeth's plot. I hope you can have a look at it, too. I included various alternatives. Please, tell me if they are all possible. 1)The play opens with the news that Macbeth has succeeded in defending
  78. Physics - HELP! PLEASE

    The problem is from fundamentals of physics 9th edition by halliday. Here is a free download of the book since I couldn't post the graph (I had to write out link since site doesn't allow links to be posted): tripplew period sendspace period com/file/shrz0x
  79. Physics

    You are at standing at a window in the University tower that is 42.0 meter above the ground. Your physics professor (who is 2.12 m tall) is walking on the ground below, approaching to tower at a speed of 1.12 m/s. You are holding an egg, which you would
  80. physics

    Often in physics we won't be able to predict motion of a bunch of objects exactly and so we resort to statistical methods. An example of a statistical approach is the resulting profile of a bunch of disks dropped through a series of pegs. As each disk
  81. U.S. History

    Text 3: Excerpt from “All in the Day’s Work: An Autobiography” by Ida M. Tarbell I had been disturbed for some time by what seemed to me the calculated belittling of the past achievements of women by many active in the campaign for suffrage. They
  82. physics

    john and paul are trying to move a 100kg piano which is resulting on a flat, smooth floor. John pushing towards the North, while Paul is pushing towards the East. Both are exerting a 100N force. What is acceleration of the piano (magnitude and direction)?
  83. History

    Word box : Mercantilism Religious Freedom Magna Carta English Bill of Rights Mayflower Compact Fundamental Orders of Conneticut Virginia House of Burgesses Navigation Acts 1. 1689 law that reinforced the idea of no taxation without representation and the
  84. Physics

    an 80 kg physics student is riding the cajun cliffhanger. this ride had a diameter of 8.0m (u:0.06)the ride produces enough centripetal force to suspend a student. 1.what is the force of friction to keep the student suspended? 2.what normal force is
  85. math riddle

    Estimate a population: To study a species of fox, a team captures and tags 25 foxes from a large forest and then releases them. The following week they capture 15 foxes and find 5 are tagged. Estimate the number of foxes in the forest. This is a proportion
  86. english/8

    Writing terms. Fill in the blanks. 1-final 9-topic 2-prewiting 10-introduction 3-idea 11-homonyms 4-conclusion 12-transition 5-voice 13-rough drapht 6-conventions 14-antonyms 7-persuasive 15-synonyms 8-organization -the( )writing trait judges your ability
  87. Check my physics

    Would you mind checking one of my problems from my physics study guide? I know the answer and just want to make sure I am using the right formula. :) A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. a. Determine the kinetic
  88. Physics

    Hi, I've been having trouble with this physics problem. I'm not sure where to begin. A brick with mass m1=2.5 kg can move without friction on a horizontal plane. The brick is attached to a wall by an ideal spring with spring constant k=2300 N/m. A second
  89. Physics

    A block of mass 20g sits at rest on a plate that is at the top of the fluid on one side of a u-tube as shown in figure P10.38. The u tube contains two different fluids with densities p1= 1000 kg/m^3 and p2= 600 kg/m^3 and has a cross sectional area of A=
  90. Physics

    A spring has a spring constant that is 120 N/m, and has a 0.1 kg block attached to it. The spring and mass sit on a horizontal surface that has no friction. The block is pulled 0.2 m and then released. Please find the frequency of the oscillations, the
  91. physics

    If a 80 lightbulb emits 4.0 of the input energy as visible light (average wavelength 550 ) uniformly in all directions, estimate how many photons per second of visible light will strike the pupil (4.0 diameter) of the eye of an observer 3.0 away. 1. I
  92. Physics -- Repost

    Homework Help Forum: Physics Posted by Sandra on Sunday, February 28, 2010 at 10:20am. Thank you for answering my previous questions! I have another one now in regards to the following question... An unknown potential difference exists between the inner
  93. physics

    One student is pushing on a chair with a force of 260.6 N directed at an angle of 30 degrees above horizontal while a second student pushes on the same side of the chair with a force of 21.0 N at an angle of 15 degrees below horizontal. What is the
  94. english

    Fix the underlined part in the sentence. This was an important question to Americans in the eighteen century. When they were ruled by Great Britain, and it is an important question today when countries find themselves controlled by more powerful outsiders.
  95. physics

    A 25-kg bullet traveling shoots into a physics textbook that is 3.5 cm wide, and exits the textbook traveling 40 m/s. Poor defenseless textbook! (A) What was the magnitude of the average deceleration of the bullet while it was penetrating through the
  96. Physics

    Hello can someone please help me with this physics question and show the work so I can understand? A box at the top of a rough incline possesses 981 joules more gravitational potential energy than it does at the bottom. As the box slides to the bottom of
  97. College Physics

    One last physics problem left: Peggy drives from City A to City B in 50 minutes. City A is 75.1km from City O in a direction of 25degrees west of south. City B is 23.9km from City O in a direction of 20degrees south of west. Using City O as your origin,
  98. Physics

    A child pushes a toy box 4.0 m along the floor with a force of 6.00 N directed downward at an angle 37.0 degrees to the horizontal. (a)How much work does the child do? (b)Would you expect more or less work to be done if the child pulled upward at the same
  99. Science - Chemistry

    1. Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of the ____. 2. The description of the structure of the atom is called the ___. 3. In a water molecule, two atoms of hydrogen and one atom of oxygen share
  100. physics

    Astronomers determine masses of distant objects by observing their smaller companions. For example, they can measure the period of a planet orbiting around a distant star, measure the radius of its circular orbit, and then employ Newtonian physics to