1. basic electroincs

    A full-wave rectifier circuit is driven by a sinusoidal input voltage with Vrms=15V and frequency 50Hz. If the load resistance is 100Ω, what is the ripple voltage with a filter capacitance of 1.5mF? (Assume the diodes to be ideal, with Von=0V.)
  2. World history

    Whih of the following was the most important factor in enabling the Spanish to defeat the Aztec Empire ? A. The Spanish were able to field larger armies than in the Aztecs. B. Spanish tolerance of Aztec religion and culture weakened Aztec resistance. C.
  3. English

    Hello! I'm writing a story for English class, and it's supposed to be somewhat like 'the devil and Tom walker'. I'm don't know how I should start the story so could someone maybe give me some ideas? (: The main character is Lilith Thompson. The setting is
  4. Physics

    A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum
  5. Statistics

    The number of automobile accidents per day in a particular city is believed to have a Poisson distribution. A sample of 80 days during the past year gives the following data. Compute the value of the test statistic. Use α=0.05. Number of Occurrences
  6. Physics

    In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." (See Fig. 5-35.) The room radius is 4.6 m, and the rotation frequency is 0.7 revolutions per second when the floor drops out. What is the minimum coefficient of static
  7. Physics

    In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." The radius of the room is 4.0 m, The coefficient of static friction is μ=0.13. What is the minimum rotation frequency such that the people will not slide down the
  8. physics

    You take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a tension of 2.20 N. You use your data to create a plot of wavelength (in m) vs inverse frequency (in s) and the linear fit of your graph gives a
  9. PSYchology 220

    # 1.61 (1 pts.) Dr. Johnson believes that the frequency and intensity of compulsive behavior exists on a continuum from mild to severe. Dr. Johnson prefers to use which approach when viewing this behavior? A) categorical B) dimensional C) medical D)
  10. physics/music

    A partially open window presents an opening 20cm wide. What kind of sounds from outside will go across the room in a well-defined beam? What kind will spread evenly throughout the room? Roughly what frequency marks the boundary between the two cases?
  11. Physics

    In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." The radius of the room is 5.5 m, The coefficient of static friction is μ=0.1. What is the minimum rotation frequency such that the people will not slide down the
  12. Science

    A 6 kg grinding wheel of radius 0.2 m rotates at a constant rotational frequency of 4 rad/s when an object makes contact with the outer edge of the wheel. Friction causes the wheel to stop in 2 seconds. What is the average torque on the wheel by the
  13. chemistry-light

    the SI Unit of length is meter,which is defined as the lenght equal to 1,650,763.73 wavelengths of light of the light emitted by a particuar energy transition in krypton atoms.calculate the frequency of the light to three significan figures.
  14. physics

    In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." (See Fig. 5-35.) The room radius is 5.4 m, and the rotation frequency is 0.8 revolutions per second when the floor drops out. What is the minimum coefficient of static
  15. Physics

    A woman is standing in the ocean, and she notices that after a wave crest passes, five more crests pass in a time of 42.0 s. The distance between two consecutive crests is 24 m. Determine, if possible, the following properties of the wave. If not possible,
  16. Physics

    A 6 kg grinding wheel of radius 0.2 m rotates at a constant rotational frequency of 4 rad/s when an object makes contact with the outer edge of the wheel. Friction causes the wheel to stop in 2 seconds. What is the average torque on the wheel by the
  17. Math

    Given the two-way relative frequency table below, which of the following statements is correct? Autumn Winter Spring Summer Total Male 0.10 0.08 0.11 0.16 0.45 Female 0.14 0.12 0.05 0.24 0.55 Total 0.24 0.20 0.16 0.40 1 A. The largest percentage of people
  18. math

    in one elementary school class the following information on sports preferences was obtained: 7 liked tennis; 11 liked baseball; 9 liked soccer; 5 liked tennis and baseball; 3 liked baseball and soccer; 2 liked tennis and soccer; and 2 liked all three
  19. Calc 1

    A rectangular garden is to be enclosed by a fence and divided into 5 regions as shown below. Find the values of L and W for which the total area is as large as possible assuming that only 120 ft. of fencing is available.
  20. Algebra

    Please check for me. 7p - 7/p divided by 10p-10/5p^2 = 7p^2 6x - 6/x * 6x^2/8x-8 = 9x/2 I'm not sure how to answer this one. x/2 divided by 9/x + 5 I think it's x(x + 5) / 18 Without grouping symbols () it is impossible to understand the problems. The ^
  21. History

    How did the Renaissance and humanism affect educational opportunities in Europe? (Select all that apply.) the publishing and distribution of books increased during the Renaissance, which made knowledge more widely available libraries sprang up in major
  22. Literature

    I am studying Sir Francis Bacon in my lit class. What might Bacon think of the way technology has taken hold of his life and works? Would Bacon agree or disagree that the internet is a utopia? I don't think Sir Francis Bacon would agree the internet is a
  23. PHYSICS

    Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #7: A 30 kg ball is launched at an angle of 15 degrees
  24. Maths

    In a class, the number of girls as a fraction of boys is 5/4. Write down the number of boys as a fraction of the number of girls. Thanks.
  25. Maths

    In a class of 50 students,24 students have taken maths,16 have taken maths but not geography.Find the students who have taken geography but not maths,if all the subjects have taken at least one of the subject
  26. Maths

    you have to solve the following by finding the value of x and y. can u help please? x+3(x+1)=2x 1+3(x-1)=4 2x-2(x+1)=5x 2(3x-1)=3(x-1) 4(y-1)+3(y+2)=5(y-4) 3y+7+3(y-1)=2(2y+6) These are exercises in standard algebraic manipulation of equations. Basically,
  27. Chemistry help!!!

    The class will react 50.00 mL samples of .200 mol/L potassium phosphate with an excess of 0.120 mol/L lead II nitrate solution. what is the minimum volume of lead II nitrate solution required? What volume of lead II nitrate solution should the instructor
  28. English

    I'll try to learn how to make a clear voice. I'll try to practice making a speech in my room. I'll try to study hard to go abroad. I'll try to study hard to learn in college in the USA. I'll try to study hard to learn linguistics in an American University.
  29. Chemistry 11

    So I did a lab determining the chemical formula of a hydrate. We had to find the molecular formula of a hydrate of copper (2) sulphate, CuSO4 .xH2O. My observation table looks like this: Mass of clean, dry test tube: 21.6g Mass of test tube + hydrated
  30. physics

    An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a)
  31. physics

    An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a)
  32. physics

    An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a)
  33. physics

    An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a)
  34. Statistics

    Can 2 X 2 between-subject ANOVA be used if participants were from the same class and all completed the same survey? For example, say the two conditions were athletic status(athlete vs non-athlete) and parent status (parent or not a parent) and all
  35. Algebra 1

    Brianna needs to earn a C in her Geology class. Her current test scores are 65, 67 67, and 93. Her final exam is worth 6 test scores. In order to earn a C Brianna's average must lie between 70 and 79 inclusive. What range of scores can Brianna receive on
  36. Physics

    A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the
  37. Physics

    A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the
  38. statistics

    There are four entrances to Govt center. The building supervisor wants to know if entrances are equalized. To investigate, 400 people were seen entering the center. The number using each entrances is below. At the .01 significance level is there a
  39. statistics

    a sample of 120 men and women randomly divided into 3 groups with 40 people per group. group 1 members varied their workouts. group 2 performed the same exercise at each workout. group 3 had no set schedule or regulations for their workouts. by the end of
  40. dwrls,math

    PLEASE LOOK IN THE BOTTOM OF THIS MESSAGE...... solve for x: 3x - 2y = 6 i need help in solving this: the possible answers has to be one of these: A)2y +6 divided by 3 b)3x -6 divided by 2 C) 2 + 2y D) 2/3y + 6 but how i keep trying and i don't get non of
  41. Calculus

    We're doing a lab in my Calc II class and I'm stuck on this question. I tried to do it by looking at instructions for a similar question in the book, but it made me more confused. Here is the question and my work: Find the area of the region enclosed by
  42. Guidance and Discipline

    Miss Melanie is conducting an art lesson with her pre-kindergarten class. She has spent the last fifteen minutes explaining how to construct a rabbit from the materials on the tables. As she begins to discuss how the children will divide the materials at
  43. Math

    2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a random sample of grades achieved by 8 female students. Male 78 87 75 64 90 80 65 86 74 81 Female 71 50 80 75 90 61 85 81 Test
  44. Math

    There's a rectangle. On 1 side is 8 which is the Length side I have to find out how long the width side is. The whole perimeter has to equal 25 P=25 So if both length sides are 8 then that equals 16. Now I have to see how much both width sides are I did
  45. Math

    A circle is divided into 8 equal parts. What is the total angle measure of 4 parts?
  46. P6 maths

    Mrs Wong baked some pizzas for her students. The boy received twice as many pizzas as the girls. There were as many girls as boys in the class. Each girl ate 4/9 of a pizza and they finished all pizzas that were given to them. Each bot ate 3/4 of a pizza
  47. Math

    Suppose there is a quiz in your mathematics class every week. The value of each quiz is 50 points. After the first 6 weeks, your average mark on these quizzes is 36. a) What average mark must you receive on the next 4 quizzes so that your average is 40 on
  48. Art

    Could you please help me express the following evaluations? Thank you. 1) You wrote exactly what I included on the photocopy without varying (hardly/almost) anything. The only word you changed is not an English word. 2) You also failed to include
  49. Physics

    Two identical ice skaters are holding onto opposite ends of a very long spring with a spring constant of 650 N/m. While spinning in a circle, the skaters frequency of revolution is measured to be 0.85 Hz. Calculate the mass of the skaters. m = 45.6 kg
  50. Chemistry Physics

    What frequency is heard by an observer who hears the 450 Hz siren on a police car traveling at 35 m/s away from her? Assume that the velocity of sound in air is 345 m/s. Is this the correct? 450*345/(345+35) =408Hz
  51. math physics

    What frequency is heard by an observer who hears the 450 Hz siren on a police car traveling at 35 m/s away from her? Assume that the velocity of sound in air is 345 m/s. Is this the correct? 450*345/(345+35) =408Hz
  52. physics

    A speaker is designed for wide dispersion for a high frequency sound. What should the diameter of the circular opening be for a speaker where the desired diffraction angle is 11° and a 9100 Hz sound is generated? The speed of sound is 343 m/s
  53. Physics

    Gamma-ray bursters are objects in the universe that emit pulses of gamma rays with high energies. The frequency of the most energetic bursts has been measured at around 3.0 × 10 21 Hz. The speed of light is 3 × 10 8 m/s. What is the wavelength of these
  54. Induced current, EMF.

    What is the maximum magnitude of the induced current in mA and how many times does this occur per second? ------------------------------- For the second part of this question since I know the Angular Velocity (w) of a rotating coil with experiences this
  55. English- Ms. Sue

    I asked these 2 questions yesterday and Writeacher answered but was unsure, could you please take a look at them. 3. Which excerpt from William Wordsworth's "The World Is Too Much With Us" is most explicitly critical of modern life? A.) "We have given our
  56. gen105

    I need hel for both classes on my las assignmet I need to create a student survival guide for gen 105. this is the assignment: Compile a 1,000- to 1,250-word survival guide that will serve as a resource for you throughout your program. Using what you have
  57. HELP!!

    1.) 15 * 4 2/3 2.) 10 2/3 divided by 4
  58. physics

    For a class demonstration, your physics instructor pours 1.16 kg of steam at 100.0°C over 4.69 kg of ice at 0.0°C and allows the system to reach equilibrium. He is then going to measure the temperature of the system. While the system reaches equilibrium,
  59. glucose monitors

    In my class, we have to research on glucose monitors and pick two disadvantages and find a way to solve those disadvantages. The teachers know the students are not expert on designing a new product but using creativity, we have to come up with solutions
  60. Philoaphy

    According to Arthur Schopenhauer, "Thus the world must be recognized, from one aspect at least, as akin to a dream, indeed as capable of being put in the same class with a dream." His idea reflects the 19th century question about the nature of experience.
  61. math

    a circle is divided into 8 = parts. what is the total angle measure of 4 parts
  62. English

    Hello! I am writing observation jornals and have problems with defining of 2 global aims. 1.young learners of EFL have learned yesterday one word in their English class.How can I define the global aim? I need to start with "By the end of the lesson,
  63. World History

    The effect of a new greek middle class emerging and challenging nobles for power was : A. Athenians appointed solon to make reforms B. A form of government called an olligarchy emerged C. The government moved toward democracy D. Economic reforms were
  64. World History

    The effect of a new greek middle class emerging and challenging nobles for power was : A. Athenians appointed solon to make reforms B. A form of government called an olligarchy emerged C. The government moved toward democracy D. Economic reforms were
  65. Psychology

    Nisa has grown up in a small village in the foothills. There was no electricity and water had to be hand pumped. They seldom saw people from the "outside." When she entered school the bus had to pick her up at 6:30 am in order for her to arrive at school
  66. CHemistry

    My professor gave us these question in call and we solved for it in class, however im not sure how we got the answers. I dunt really understand the concept of intermolecular forces if some can please help me i have a quiz tomorrow. A. For each pair of
  67. physics class-Help!!!

    A 3.0 m rod is pivoted about its left end.A force of 6.0 N is applied perpendicular to the rod at a distance of 1.2 m from the pivot causing a ccw torque, and a force of 5.2 is applied at the end of the rod 3.0 m from the pivot. The 5.2 N is at an angle of
  68. MUSIC ASAP

    Hi I'm a music man that sings and plays trumpets and 'bout to write and compose music which I'm getting started. I'm also a practical conductor also. Need help on how to prepare myself and how to write cues, bridges, parts, etc. for orchestra, jazz band,
  69. Physics

    The New England Merchants Bank Building in Boston is 152 high. On windy days it sways with a frequency of 0.12 , and the acceleration of the top of the building can reach 2.5 of the free-fall acceleration, enough to cause discomfort for occupants. What is
  70. College Physics PLEASE HELP

    A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum
  71. Physics

    The New England Merchants Bank Building in Boston is 152 high. On windy days it sways with a frequency of 0.12 , and the acceleration of the top of the building can reach 2.5 of the free-fall acceleration, enough to cause discomfort for occupants. What is
  72. Philosophy

    I need help with this proof for my philosophy class. This proof is supposed to be done via conditional proof, so it is supposed to use ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be precise
  73. Foreign languages

    Thank you, Writeacher. I left out the following sentences. Thank you very much. 1) Who has called the wrong number? His team has always been (or have always been?) worse than the others. 2) Have you read that book yet? No, I haven't finished it yet. 3)
  74. Lee

    For my class you have to choose from several different scenarios, make up your own equations from the scenario, and then solve and graph them in excel. I have chosen the following scenario: Evaluate whether a prepaid or monthly cell phone plan is most
  75. Psychology

    So my class watch this movie called Boys Do Not Cry (Boys Don't Cry) and now i have two write a 7 page paper. I am having some difficulties trying to answer this questions Please help me giving some ideas of what i could write. •Describe the socio-sexual
  76. electriacl safety

    What are some important elements that should be included in any good training program. Explain. I will be happy to critique your thinking on this. If this subject isn't thoroughly covered in your text or class notes, you may find some helpful information
  77. Psychology

    So my class watch this movie called Boys Do Not Cry (Boys Don't Cry) and now i have two write a 7 page paper. I am having some difficulties trying to answer this questions Please help me giving some ideas of what i could write. •Describe the socio-sexual
  78. 7th grade math help please the REAL ms.sue

    1. Mac’s farm has a total of 18 horses and 27 cows. What is the ratio of horses to cows in simplest form? (1 point) 6 over 9 18 over 27 2 over 3 three over two 2. A class has 27 students. Fifteen are boys and the rest are girls. What is the ratio of
  79. English

    Is this okay so far? (see previous post for topic) During the Victorian Age advancements in technology led to a British society that was more geared towards manufacturing than agriculture. New inventions allowed the production of goods to be moved from
  80. A01 and A02 points

    Hi, i'm a university student studying Religion and Education. I have an assignment where i have to build a teacher pack, with resources for the lesson, i have to write a 2000 word evaluation of the pack. its for an A-level class studying Sikhism and their
  81. Physics (Science)

    Hi, For my physics class, we have to design our own experiments to calculate the amount of power exerted for each situation. However, I'm really unsure of how to go about finding the power for the situations. The first situation is doing a push-up, and the
  82. books

    Hi there, I have been trying to write a practice essay for English on how themes direct the plot in Pride and Prejudice. I want to discuss how Austen uses opposing themes to influence what happens in the novel. So far I want to look at how Elizabeth and
  83. math

    In Mrs.Marshall's classroom, 6/7 of the students play sports. Of the students who play sports, 4/5 also play an instrument. If there are 35 in her class how many play sports and an instrument?
  84. Math

    In math class, a student has an average grade of 85% for five tests so far. What grade must that student earn on the next test to reach an average grade of 90% for all six tests?
  85. curriculum development

    The size of a play/work area in the class made a noticeable difference in the time children stayed there and were engaged in complex play. The best size area is A) small and open B) large and open c) small and sheltered or d) large and sheltered. is B)
  86. Grammar

    What is the simple subject and simple predicate of this sentence? The students in my class made custard. I think it is students for the simple subject and made for the simple predicate is this correct?
  87. MATHS

    in a class of 60 students,the number of students who pass biology is 6 more than the number who pass chemistry.every student passed at least one of the two subject.how many pass in only biology.how many pass in only chemistry.
  88. Algebra

    O.k. this is similar to the other one I posted. There is a technique in my book how to solve similar ones but the examples aren't so good, so I have no clue were to even start. 1-(1/x)-(12/x^2) ----------------divide top by bottom 1+(6/x)+(9/x^2) Here are
  89. Math pls help me

    A dance school has 54 students who learn salsa and 23 of those students also learn ballet. There are 15 students who do not learn salsa but learn ballet and 10 students do not learn either salsa or ballet. Which table best shows the relative frequency of
  90. US History

    'Consider both sides of an issue that has been debated in recent years: Should organized prayer be allowed in public schools? List 3 reasons why it should be and 3 reasons why it should not. Then decide which position you favor.' 3 reasons it shouldn’t
  91. Finite Math

    A small seminar class consists of Anne, Bill, Cathy, Dan, Ellen, and Frank. The teacher has been told that 2 of them are from Indiana, 3 of them are from Michigan, and the other 1 is from Ohio. But the teacher does not know who is from which state. So the
  92. Philosophy

    I need help with this proof for my philosophy class. This proof is supposed to be done via indirect proof or conditional proof, so it is supposed to use AIP and IP or ACP and CP to derive the conclusion! This is an assignment that is submitted through
  93. Philosophy

    I need help with this proof for my philosophy class. This proof is supposed to be done via indirect proof or conditional proof, so it is supposed to use AIP and IP or ACP and CP to derive the conclusion! This is an assignment that is submitted through
  94. MATH

    I am confused about the following problem. Could someone help me out? In a statistic class, the average score of midterm is 75 and the SD is 8. The average score of final is 65 and the SD is 12. The scatter diagram of the two variables (midterm/final
  95. Writing / History

    Help needed coming up with a specific thesis. Here is the prompt: Explore the role of women in Archaic Greek society as presented in the literature examined in class (The Iliad, Sappho's poems, Archilochus, and a book about Ancient Greece by Thomas
  96. Science

    I need help writing a procedure for my Earth Science class. Our teacher gave us 5 minerals and told us 5 mineral names, but we have to figure out which is which. We could do tests like specific gravity, luster, streak, and hardness. I decided to do
  97. Science

    I need help writing a procedure for my Earth Science class. Our teacher gave us 5 minerals and told us 5 mineral names, but we have to figure out which is which. We could do tests like specific gravity, luster, streak, and hardness. I decided to do
  98. math

    Greg teaches martial arts. He charges a one time processing fee of $5.00 and the cost of classes are shown below. let x represent the number of classes and y represent the cost of the classes. Based on the information, what will it cost to take 10 classes?
  99. science-biology

    I'm pretty sure the answer is A, am I correct? Natural selection tends to A) increase the frequency of characteristics that enhance survival and reproduction. B) decrease the number of individuals in any given population. C) lead to an increase in genetic
  100. physics

    A vertical spring stretches 13 cm when a 2.3 kg block is hung from its end. (a) Calculate the spring constant. This block is then displaced an additional 3.2 cm downward and released from rest. Find the (b) period, (c) frequency, (d) amplitude, and (e)