physics( i have no idea how to go about gettign th

165,102 results, page 91

  1. help please physics

    Design an array of individual solar cells that woulproduce 120 volts DC. About how large an area of solar cells would be needed to produce 2 kWe of/ output power at noon on a clear day
  2. AP Physics (circular motion)

    The moon revolves about the Earth in a trajectory that is very nearly a circle of radius r = 384,401 km, and requires 27.3 days (23.4 x 10^5 seconds) to make a complete revolution. What is the acceleration of the moon toward the Earth?

    use what you know about the motor priciple to explain the source of buzzing in power lines strung along roads. so I think that this is because of the resistance caused by the conductors in the power grid. However I don't know how this would relate to the motor principle...
  4. Physics

    I need help figuring this out. I am asked to write about similarities of two different ways of determining the value of g. One of them is using the slope of the line, and one of them is using the average. Each method used the same L and T values.

    On the moon, the downward acceleration dur to gravity is only about one-sixth as large as it is on earth. if a 16 kg rock is put on a spring scale on the moon. What would the scale read? Give your answer in newtons.
  6. physics

    In the figure below, the scale on which the 63 kg physicist stands reads 236 N. How long will the cantaloupe take to reach the floor if the physicist drops it (from rest relative to himself) at a height of 2.1 m above the floor? How would you go about solving this?
  7. physics

    The oxygen taken in by the body reacts with fats, carbohydrates, and protein, liberating energy internally at a rate of about 2.12×104 J /liter. If a 85.4 kg man requires 73.0 W of power even while sleeping, what is his rate of oxygen consumption?
  8. Physics

    A 20-kg child running at 1.4 m/s jumps onto a playground merry-go-round that has inertia 180 kg and radius 1.6 m. She is moving tangent to the platform when she jumps, and she lands right on the edge. Ignore any friction in the axle about which the platform rotates.
  9. Spanish

    Can someone check my translations? Translate the following Spanish into English. 1. ¿De dónde eres? Where are you from? 2. ¿Cómo eres? How are you? (What is this asking?) 3. ¿Qué clases tienes? What classes do you have? 4. ¿Qué vas a hacer la fin de semana? What are ...
  10. U.S. History

    1. What would this image convey to someone from the early-1900s about about the suffrage movement? (image: "early-1900s women's suffrage painting"-- this has a sign on it that says "official program women's suffrage procession" a person riding a horse and "Washington D.C. ...
  11. economics

    Studies indicate that the price elasticity of demand for cigarettes is about 0.4. If a pack of cigarettes currently costs $4 and the government wants to reduce smoking by 20 per cent, by how much should it increase the price? Show your calculations. (b) If the local government...
  12. Math

    Okay so I'm trying to work out how many mm of rain fell in a certain area. I've got the total volume/capacity that fell (3.51125KL) and the total area that it fell in (8558.25m). My formula is Total Rainfall = rainfall mm x area covered How would I make sure that all the ...
  13. physics

    4)A bug is moving east at 1 m/s. A semi-truck is moving west at 45 m/s. They collide and the bug is splattered across the windshield of the semi and now travels west.At the point of impact, which of the following is true about the force of the bug acting on the semi and the ...
  14. physics

    4)A bug is moving east at 1 m/s. A semi-truck is moving west at 45 m/s. They collide and the bug is splattered across the windshield of the semi and now travels west.At the point of impact, which of the following is true about the force of the bug acting on the semi and the ...
  15. English

    "Lines Composed a Few Miles Above Tintern Abbey" is easy to recognize as a Romantic poem because it * describes the narrator's emotions about a landscape. * is about a revolution. * takes place entirely outdoors. * argues for the importance of the individual.
  16. English

    Which of the following describes literary analysis? Need help Please. A.writing that is vague and uncertain B.a central message about life C.determining the meaning behind events and characters’ actions D.written directions about how the actors sound and behave
  17. Math

    The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 36 and a standard deviation of about 10. Suppose that 16 individuals are randomly chosen. Is it appropriate to use the normal approximation for the sampling ...
  18. 4th grade-music

    In the song, "Somebody" by Reba M cEntire, I have to retell the story bein told in the song. Is the song about finding somebody special to fall in love with?
  19. Shakespeare

    I have some essays questions to do and I have some answers, but could someone add to them? Any one of them could be the one i have to write and essay on. They are all about Julius Caesar 1. What are the virtues and limitations of Brutus? Would he be a good ruler? Why or why ...
  20. 4th grade science

    I am supoose to write some information about Micheal Forada for science, concerning magnatism or electricity. I can't find anything on the internet about him. Could someone tell me were to look? Any help would be appreciated.
  21. Philosophy

    I'm suppose to write a page long analysis about David Hume's beliefs about God..supposedly hes an athesist, but he also says he believes in God the confused so any help would be great thanks!
  22. Social Studies

    Does anyone know what kind of education a Medieval Princess received? I know they didn't get as much as boys and learned more about the arts, manners, and such...but I need like a source where I can read about it more. Could anybody give a website that could help?? Thanks!! [:
  23. English

    What's a good introductory paragraph for an essay about To Kill a Mockingbird? It's about the theme and my theme is, "If a person lives with sympathy and understanding, then it's possible to retain faith in humanity even though it has a capacity for evil."
  24. economics

    I'm doing a research about Ebay, We need: Brief history,Products and Economic overview. I did the history part but can't seem to find enough information about the latter two. Can someone help me? sources would be helpful
  25. economics

    I'm doing a research about Ebay, We need: Brief history,Products and Economic overview. I did the history part but can't seem to find enough information about the latter two. Can someone help me? sources would be helpful
  26. math

    the land area of a country is about 5.0million square miles, and the population is about 700 million people.what is the average population density? simplfy answer and round to one decimal place as needed
  27. precalculus

    suppose the only information you know about a function f is that the domain of f? is the set of real numbers and that f f(1)=1,f(2)=4,f(3)=9,f(4)=16what can you say about the value of ,f(5). Hint the answer to this problem is not 25 the shortest correct answer is just one word
  28. English

    I'm writing an essay about stating my position on whether everyday people can be considered heroes. Can someone give me some ideas of what each paragraph should be about? Like how should I make it flow? Please help
  29. English

    I think they do, but can someone tell me if these 3 sentences contain conjunctive adverbs: It is one thing to have a baseball card from that era; undoubtedly, to have the opportunity to see Wagner play, though, that would be a real treat for us both. You and I, however, should...
  30. English

    1. What does he do when/after he gets on the bus? 2. He says hello to the driver and his friends. (Are the question and answer correct? Do we have to use 'when' or 'after' in this case?) 3. Is the fact that Venice doesn't have cars a problem? - Not at all. 4. Where do Jeepneys...
  31. english

    Hi, I have to compare Crossing Brooklyn Ferry by Walt Whitman to modern day time. The last couple of journal entries I've compared to well known songs and their lyrics. I'm thinking of comparing it to an important event or movie, but I'm not sure what to write about. Any ideas...
  32. history

    Which of the following are true statements about the Fall Line? Choose All That Apply A.It marks the northern edge of the Piedmont. B.It is the last natural barrier for rivers on their way to the Atlantic. C.Many cities have developed along it. D.It contains large numbers of ...
  33. Statics

    I would like to write vector expressions and determine the andle the slipe makes with the horizontal for the following. a 2kg block is on a slope and is about to slip down, the coefficient of static friction is 0.4. so far I have W=2g F=Fi N=Nj and tan-1 0.4 = 21.8 degrees. W=...
  34. Math

    Please help me! Last question. Needs to be done today! The kilo-pascal is a unit of measure for atmospheric pressure. Suppose the atmospheric air pressure at sea level is about 96 kilopascals. For every 1,000-meter increase in altitude, the pressure decreases about 11.6 ...
  35. physics

    A jet plane is traveling at a constant speed in a straight line in level speed. What does this tell you about the forces acting on it, what forces are acting on it .
  36. Physics

    Estimate the number of h20 molecules in a human body of mass 80.2 kg. Assume that, on average, water makes up about 62 % of the mass of a human body.
  37. physics

    A rocket is used to place a satellite in orbit about a planet. The velocity of the satellite is 534 m/s and the radius of orbit is 1.21×108 m. What is the mass of planet?
  38. Physics

    Humans can hear sound frequencies ranging from about 20-20000 Hz. What is the shortest wavelength humans can hear (assuming sound travels at 343m/s)
  39. Physics

    the human body is only about 25 % efficient at converting input chemical energy to useful work. where does the rest of the input chemical energy go?
  40. Physics 12

    "Two small spheres are located 0.50m apart. Both have the same charge on them. If the repulsive force is 5.0N, what charge is on the spheres, in microcoulombs?" I can begin to use my electrical force formula, but then I have two unknown charges. The anwser is 12 uC, but I am ...
  41. physics

    How do I go about in solving this? A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. (a) How high above Earth's surface is the satellite? ___ km (b) What is the satellite's acceleration? ___m/s2
  42. physics

    When kicking a soccer ball (0.35kg), the time of contact is usually about 5ms. What average kicking force would be required to attain a ball velocity of 110 km/hr if the ball is initially at rest?
  43. physics

    A baseball pitcher throws a baseball with a speed of 48 m/s . In throwing the baseball, the pitcher accelerates it through a displacement of about 3.5 m, from behind the body to the point where it is released how long was it in the air before returning to earth?

    Mars rotates slowly about its axis, the period being 687 days. The mass of mars is 6.39 x 10^23 kg. Determine the radius for a synchronous satellite in orbit around Mars. (assume circular orbit)
  45. physics

    A satellite orbits Earth once per day. From the reference frame of the Moon, which orbits Earth once about every 27 days, what is its motion?
  46. Physics

    The speed of light is about 3.00 x 10 to the power of 5 km/s. It takes approx. 1.28 seconds for light reflected from the moon to reach Earth. What is the average distance from Earth to the moon? Thank you
  47. 5th

    But most rafters take a chance with the United States "wet-foot, dry-foot" policy, which states that Cubans who make it to United States soil is free to seek political asylum. However, those caught offshore are returned to Cuba. Very often, Cubans win the race against the ...

    At a Grand Prix, drivers sustain lateral accelerations (sideways) about five times the acceleration due to gravity while driving around curves at speeds of 288 km/h. Assuming a circular curve, find the radius of that section of the track.
  49. Math

    The 1998 film Armageddon had a production budget of $140 million. The domestic box office gross was about $200 million and the international box office gross was about $350 million. The studio considers a film a financial success if the worldwide( domestic plus international)...
  50. physics

    Certain neutron stars (extremely dense stars) are believed to be rotating at about 0.76 rev/s. If such a star has a radius of 10 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation? i got 3.4187*10^23 but its not right?
  51. physics

    There is a legend of a Dutch boy who bravely held back the whole Atlantic Ocean by plugging a hole in a dike with his finger. Is this possible and reasonable? Estimate the force if the hole were about 1.5 square centimeter in area and 1.8 meter below the water level.
  52. physics

    The coefficient of kinetic friction between tires and dry pavement is about 0.80. Assume that while travelling at 27m/s you lock your brakes and as a result the only horizontal force on the car is the frictional one. How many seconds does it take you to bring your car to a stop?
  53. English / Cultural Diversity

    I have an assignment as follows: • Prepare a 1,400- to 1,750-word autobiographical research paper that analyzes the influences of race as it relates to your community. In your paper, write your first-person account of how human interactions in your community have been ...
  54. Physics

    Hi I have a question in Physics A block with mass 50kg is held on a slope. Ù friction coefficient = 0.35 between the plane and the block .. Planets angle v with the horizontal is 25 degrees. How far will the block slide down the plane in 5 seconds after it is released (in ...
  55. Geology

    Respond to the following scenario: o Your younger brother is in 5th grade. He comes home and tells you to look at an animation his teacher showed him in geology class. o Review the Continents of the Past animation on this week¡¦s aXcess page. o After viewing the animation, ...
  56. Physics

    How can elements with low atomic numbers have so many spectral lines?
  57. Physics

    What does wave interference have to do with the electron energy levels in an atom?
  58. physics

    At what temperature do the molecules of nitrogen gas have an rms speed of 35 ?
  59. physics

    the position of the box 3 seconds after the oscillations have started
  60. Physics

    Could you explain to me how it is possible to run a distance of 1.0 km and have zero displacment.
  61. Physics

    for imcomplete cancellation to occur, opposite pulses must have?
  62. physics

    pls show answers and work with the questions i have posted.
  63. physics

    Suppose that you have a circle with a radius of 4.02 ± 0.39 m, what is the calculated uncertainty in the area?
  64. physics

    Why is it impossible for a material to have an index of refraction less than one
  65. physics

    A penny falls from a bridge. At 3.2 seconds it will have fallen ___
  66. physics

    An isotope of iodine is many protons, neutrons &electrons does it have
  67. physics

    How much kinetic energy does a 2000 kg traveling 70 mph have?
  68. physics please help

    What effect does the magnetic field have on the speed of the particle?
  69. physics

    find energy of a single photon of light when you have 5.4*10^12 hertz.
  70. physics

    Why projectiles launched at complimentary angles have the same range?
  71. physics

    What experimental evidence do we have to show that matter is composed of particles

    A bicycle tire is 68 cm in diameter. what frequency does it have if it travels at 8m/ sec?
  73. physics

    if 8.96dm of CO is produced at STP -how many moles of CaCO3 have reacted
  74. physics

    a skydiver has amass of 140 what speed will she have a momentum of 10,000 kg m/s?
  75. Physics

    What effect do the following forces have on point? 100N, 30 degrees E of N
  76. physics

    The drawing shows the top view of two doors. The doors are uniform and identical. Door A rotates about an axis through its left edge, and door B rotates about an axis through its center. The same force is applied perpendicular to each door at its right edge, and the force ...
  77. physics

    The drawing shows the top view of two doors. The doors are uniform and identical. Door A rotates about an axis through its left edge, and door B rotates about an axis through its center. The same force is applied perpendicular to each door at its right edge, and the force ...
  78. Math

    I'm doing Similarities in class and have no idea how this question works. Any explanations as to how to do this question would be great. Here it is: Here is a way to find (roughly) the width of a river without crossing it. Place a stake B on one bank opposite a landmark A on ...
  79. Physics

    If two objects have the same momentum does the velocities of the objects necessarily have the same magnitudes? No. Consider the mass. Momentum is mass * velocity
  80. physics

    Two identical cars have the same speed, one traveling east and one traveling west. Do the cars have the same momentum?
  81. physics

    if you have two separate current carrying loops of wire in the xz plane, one at y=0 and one at y=L. And each loop carries a current of I in the same direction. how do you calculate the magnetic field across the y-axis, and what if we have n loops in each of the separate loops?

    Find all positive values for k for which each of the following can be factored. I have 2 problems i think i got the one right but not sure the second one i have no idea where to even start 2x^3+16x^2-40x=2x(x^2+8x-20) (x-2)(x+10)=8x this one i am stumped can some one explain ...
  83. Math

    Hi, this is a question I posted a couple of days ago and answers below.I am still really confused and unfortunately can't copy a picture into this. I thought it would be y-x but have no idea how to calculate that, but as the pistons move in towards each other, wouldn't the ...
  84. English grammar

    1. Write about John, Terry, etc. 2. Write about John, Terry, and so on. 3. Write about John, Terry, and so forth. ====================================== Are they all grammatical?
  85. science-chem

    Four bottles, labeled A through D, each containing about 5 grams of finely powdered white substance are found in a lab. Near the bottles are four labels specifying high purity and indicating that substances are glucose (C6H12O6), sodium chloride (NaCl), aluminum oxide (Al2O3...
  86. religions

    I have a final due within 9 wks from now. I have to do an interview to a different religion which is not mine. I am catholic. But i don't know what type of questions are good enough to ask. Does anyone know of a site or some type of good questions to ask.I just know the basic ...
  87. Math

    Hailey has bottles that hold 678 pennies each. About how many pennies does she have if she has 6 bottles filled with pennies?
  88. Math

    Again, I'm learning about trigonometric functions. I need to find the missing information for each triangle. I have the length of one leg as 24 and the opposite theta as 72. I need to figure out the other angles and side lengths, but I'm really not sure how to.
  89. Economics

    i have the following essay to do and need help...Track interest rate changes in the euro zone over the past five years and analyse why the changes were brought about. See if this enabled the European governments to hit its inflation target.
  90. Psychology

    I am supose to write a paper, as if I have lost all vision except through the retina, and how I would then perceive images received by the retina. I guess my question is, are there any type of eye diseases where this actually takes place? And how do I learn about them?
  91. com 140

    In what ways are purpose, audience, tone, and content different for interpersonal and business communication?Consider your own experience as you answer this question. If you have not worked in a business environment, you may ask a friend, parent, or other adult about his or ...
  92. IT >> Becky

    I've removed your complex post since it assumes the Jiskha Homework Forum volunteers knowledgable about your specific text and your Collaborative discussion clusters. We have no connection with any school and no way of accessing any school's private communications system.
  93. math

    Hello! My name is Robert and I am in 6th grade. I have a question about my homework and my mom and dad cant help u because they are still at work and i need help.Can you please tell me what a division problem that has the same answer as 4.65 divided by 0.12 is? If you can u ...
  94. history

    Which of the following did the Mayans consider to be worthy of recording? A. The laws of their society B. Ceremonial rituals C.Trade records D. Information about everyday life *please if you can explain I have read the text for this section over and over and just don't ...
  95. USA PoliScience

    On average, women earn about _____ as much as men. a. one-fourth b. one-half c. two-thirds d. three-fourths e. nine-tenths I have looked all over.. My educated guess would be 1/4
  96. statistics

    5. A professor teaching introductory psychology gave the grades that follow. According to the normal curve, she should have given about 4% A’s, 14% B’s, 64% C’s, 14% D’s, and 4% F’s. Do a Chi-Square to determine if the actual grade assignment significantly departed ...
  97. Rachel, Kim .. Cabdy

    This is silly. Within about 3 minutes, you have managed to post the same question 6 times under a different name. When you decide who you are and become a bit more patient, I will attempt your question. In the meantime, where does your difficulty come in?
  98. English

    I recently wrote a research proposal on teamwork and the only feedback given was to "focus on a specific aspect of teamwork". What does that mean and do you have any suggestions? I was thinking that she could be talking about why it's important or something along those lines. ...
  99. Socials

    I have to write a 100 word story(yes, insane) including all the key terms affiliated with the merging of Hudson's Bay Company and Northwest Company. I am thinking of writing it from the perspective of a Metis... what would I feel about this merge?
  100. French

    I have some questions about the imperative. 1. Prends les salades! How can one tell if this is an order to you or myself, as the conjugations for both tu and je are the same for "prendre"? 2. Is "acheter" a regular or irregular verb? I want to know whether to use "achete" or "...
  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. 17
  19. 18
  20. 19
  21. 20
  22. 21
  23. 22
  24. 23
  25. 24
  26. 25
  27. 26
  28. 27
  29. 28
  30. 29
  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
  36. 35
  37. 36
  38. 37
  39. 38
  40. 39
  41. 40
  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
  47. 46
  48. 47
  49. 48
  50. 49
  51. 50
  52. 51
  53. 52
  54. 53
  55. 54
  56. 55
  57. 56
  58. 57
  59. 58
  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99
  101. 100