1. Math

    Consider a curve lying on the cylinder x^2 + y^2 = 1 and given by the vector function r(t) = (cost,sin t, t^2), for t ≥ 0. Find equations of normal planes at the points (1, 0, 0) and (1, 0, 4π^2) Hi, I don't really know how to start this. I know
  2. algebra-word problem

    Flying to Kampala with a tailwind a plane averaged 158 km/h. On the return trip the plane only averaged 112 km/h while flying back into the same wind. Find the speed of the wind and the speed of the plane in still air. TIA
  3. Science

    An airplane's speed in still air is 240 km/h. (a) If the pilot wishes the resultant motion of the plane to be due north when a 60 km/h wind is blowing the plane due east, in what direction should the plane be headed? (b) What will then be the resultant
  4. Physics

    A plane is capable of flying 200 km/h. There is a wind of 90 km/h from the east. The pilot flies in a northwest direction relative to the ground for three hours from city A to city B. Find the speed of the plane relative to the ground, the heading of the
  5. Physics

    A plane is capable of flying 200 km/h. There is a wind of 90 km/h from the east. The pilot flies in a northwest direction relative to the ground for three hours from city A to city B. Find the speed of the plane relative to the ground, the heading of the
  6. Math

    The distance from city A to city B is approx. 2160 miles. A plane flying directly to city B passes over A at noon. If the plane travels at 500 mph, find the rule of the function f(t) that gives the distance of the plane from city B at time t hours (with
  7. Vectors

    Determine the vector equation of a plane that contains the line with symmetric equation (x+3)/-2=(y+1)/5=(z+2)/4 and the point P(1,3,0). For this question to find the direction vector you would use subtraction with the points (-3,-1,-2) and (1,3,0). Why
  8. Math

    For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i don't know how to find for each of the points
  9. math

    For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i don't know how to find for each of the points
  10. geo

    can u give me some points on against mosquito fogging because i am in green party i have this points: negative impact on environent human issue but i need two more points to discuss
  11. Physics

    This is the info for the problem: A block of mass M1 = 160.0 kg sits on an inclined plane and is connected to a bucket with a massless string over a massless and frictionless pulley. The coefficient of static friction between the block and the plane is ms
  12. trig

    A plane is flying at an elevation of 30000 feet. It is within sight of the airport and the pilot finds that the angle of depression to the airport is 18. Find the distance between the plane and the airport. Find the distance between a point on the ground
  13. Trig

    Two planes take off at the same time from an airport. The first plane is flying at 240 miles per hour on a bearing of S 45.0° E. The second plane is flying in the direction S 45.0°W at 290 miles per hour. What is the bearing of the second plane from the
  14. chemistry

    I have my exam in a little over 7 hours...can anyone help explain how to draw atoms in the Bohr Rutherford and Lewis Dot methods, as well as how to draw them as compounds and ions? My friends are no help, nor is the internet. Please!
  15. physics

    A block is released on an inclined plane from a height of 1m. There is friction (static and kinetic =.4) and the mass of the block is 5 kg, the mass of the pulley is 1 kg and it has a radius of 5 cm. The slope of the incline is 30 degrees. Find the
  16. averages

    if you had the nos 3,19,20,37,48 out of 50 on another draw what. Would the results of another draw be
  17. Math

    You are working as an office apprentice for a collage. The collage is giving away free tickets to encourage more people to visit the amateur sport tournaments the collage is planning to host. Every time a customer purchases a ticket they are entered into a
  18. mechanics and heat

    A tennis ball of mass m and radius R = 3 cm rolls up without slipping an inclined plane of inclination angle of 37 degree as shown in the figure at the bottom of the incline the center of mass velocity of the ball is v = 10 m/s . The ball stops after
  19. trg

    A plane flies in a direction of N70°E for 80 km and then on a bearing of S10°W for 150 km. a How far is the plane from its starting point? b What direction is the plane from its starting point?
  20. Precalculus 11

    It takes an express train 1hr longer to travel 240km than it does for a small plane to travel the same distance. If the plane travels twice as fast as the train, how fast does the plane travel? This is an ex., they lay out online but I'm confused about how
  21. calculus

    Find an equation of the plane containing the line of intersection of x+y+z=1 and x−y+2z=2, and perpendicular to the x-y plane.
  22. physics

    A crate is given an initial speed of 2.9 up the 29 plane shown in the figure . Assume = 0.13 how far up the plane will it go?
  23. Physics 20

    A plane with a mass of 4.50 x 10^3 kg accelerates on takeoff at 10.0 m/s2. What is the net force acting on the plane?
  24. Physics

    A plane with a mass of 4.50 x 10^3 kg accelerates on takeoff at 10.0 m/s2. What is the net force acting on the plane?
  25. Calculus

    Find the scalar equation of a plane that is perpendicular to plane r=(-2,1,3)+s(0,1,1)+t(-1,0,3) and also intersects it along the line (x-3)/2=(y+1)/-3,z=1
  26. physics

    A plane traveling at 80 m/s lands on a runway and comes to rest after 10 seconds. What was the plane's deceleration
  27. Phyisics

    If a toy plane was going 28 feet in five seconds. How fast was the plane going. If you could show me how you got the answer
  28. calculus

    Find parametric equations for the line that is perpendicular to the plane 2x-y+3z=7 and intersects the plane when x=1 and y=1.
  29. science

    what, if anything, happens to the speed of a fighter plane when it fires a cannon at an enemy plane in front of it?
  30. physics

    What can you say about the direction of the resultant force on the plane as a jet plane lands?
  31. Physics

    A 1.1 kg particle-like object moves in a plane with velocity components Vx = 30 m/s and Vy = 90 m/s as it passes through the point with (x, y) coordinates of (3.0, -4.0) m. (a) What is its angular momentum relative to the origin at this moment? _____
  32. maths

    eight points lie on the circumference of a circle. one of them is labelled P. chords join some or all of the pairs of these points so that the seven points other than P lie on different numbers of chords. what is the minimum number of chords on which P
  33. Calculus

    Find a linear function whose graph is the plane that intersects the xy-plane along the line y=2x+2 and contains the point (1,2,2).
  34. Calculus

    Find a linear function whose graph is the plane that intersects the xy-plane along the line y=2x+2 and contains the point (1,2,2).
  35. Calculus

    Find a linear function whose graph is the plane that intersects the xy-plane along the line y=2x+2 and contains the point (1,2,2).
  36. geometry

    Point P lies in plane M. How many circles are there in plane M that have center P and a circumference of 6ㅠ inches? a) none b) one c) two d) four e) more than four
  37. Calculus

    Please verify the answers~ Thank you! 1. Which of the following is the x-intercept of the plane 2x-4z+1=0? a) P(2,0,-4) b) P(0,0,0) c) P(-1/2,0,0) d) P(0,0,1/4) Answer is C. 2. Which of the following is not a direction vector for the plane 3x-2y-z+4=0? a)
  38. math

    Point P lies in plane M. How many circles are there in plane M that have center P and a circumference of 6ㅠ inches? a) none b) one c) two d) four e) more than four
  39. Geometry

    Point P lies in plane M. How many circles are there in plane M that have center P and a circumference of 6π inches? a) none b) one c) two d) four e) more than four
  40. physics

    the work needed to push something to the top of a frictionless inclined plane depends upon the plane's.....
  41. physical science

    If the mass of a plane is 2,500 kg and the net force on it is 14,000 N, what is the plane's acceleration?
  42. math

    sketch the plane x+2y-z=6. if you need help,find a third line by letting z=0 and then graph the resulting equation in the xy plane
  43. Physics PLEASE HELP

    A coffin is given an initial speed of 4.4 m/s up the 17.8º inclined plane with a coefficient of kinetic friction of 0.4. How far up the plane will it go?
  44. calculus

    Find the point on the surface z = 2x2+xy+3y2 where the tangent plane is parallel to the plane 8x-8y-z=5.
  45. Science

    A coffin is given an initial speed of 4.4 m/s up the 17.8º inclined plane with a coefficient of kinetic friction of 0.4. How far up the plane will it go?
  46. Physics

    Compared to a 400 kg plane flying at 5200 km/hr, how much momentum does a 2000 kg plane have at the same speed?
  47. Physics

    A light plane attains an airspeed of 491 km/h. The pilot sets out for a destination 785 km due north but discovers that the plane must be headed 20.5° east of due north to fly there directly. The plane arrives in 2.25 h. What was the magnitude of the wind
  48. Geometry

    Is it true for a reflection on a plane... To reflect across the: xy-plane (x,y,z)→(x,y,−z) xz-plane (x,y,z)→(x,−y,z) yz-plane (x,y,z)→(−x,y,z)? Is that true for all planes or just a few particular ones?
  49. Advanced Math

    In a game you flip a coin twice, and record the number of heads that occur. You get 10 points for 2 heads, zero points for 1 head, and 5 points for no heads. What is the expected value for the number of points you’ll win per turn?
  50. Probability and statistics

    In a game you flip a coin twice, and record the number of heads that occur. You get 10 points for 2 heads, zero points for 1 head, and 5 points for no heads. What is the expected value for the number of points you’ll win per turn?
  51. Geometry

    A plane is is flying 240 mph heading N60°E. The wind is blowing S30°E at 30 mph. 6. What is ground speed of the plane? 7. What is the smallest angle in the triangle? 8. What is the biggest angle in the triangle? 9. What is the remaining angle in the
  52. geometry

    A plane is is flying 225 mph heading S25°W. The wind is blowing S80°E at 60 mph. What is the bearing of the plane? What is the smallest angle of the triangle? What is the largest angle of the triangle? What is the remaining angle of the triangle? What is
  53. math

    graphing in the coordinate plane unit test 3. which ordered pair is not a solution of y= -12x - 3 a.(-3,33) ***** b.(8,-98) c.(-9,105) d.(3,-39) 4.not posted 5. find the three solutions of the equation y = 7x - 5 a.(3,-26),(-1,-12),(3,16)
  54. Algebra1 Word Problem HELP#2

    Part A: Explain why the x-coordinates of the points where the graphs of the equations y = 2^x and y = 4^x−2 intersect are the solutions of the equation 2^x = 4^x−2. (4 points) Part B: Make tables to find the solution to 2^x = 4^x−2. Take the integer
  55. physics

    A 75 kg pilot flies a plane in a vertical loop. At the top of the loop, when the plane is completely upside-down for an instant, the pilot hangs freely in the seat and does not push against the seat belt or seat. The airspeed indicator reads 120 m/s. What
  56. Math

    In a round robin tournament with N teams, every 2 teams play in a head-to-head match. Points are awarded as follows: 3 points for a win, 1 points for a tie and 0 points for a loss. What is the smallest value of N, such that it is possible for all the teams
  57. physics

    A projectile is projected with speed u at an angle alpha on an inclined plane of inclination angle bita. Find time of flight nn inclined plane and maximum height attained by projectile w.r.t. Inclined plane, range of projectile on inclined plane, angle of
  58. AP Physics

    Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. The hanging block has a mass of 16 kg and the one on the plane has a mass of 8
  59. calculus

    shortly after taking off, a plane is climbing at an angle of 30° and traveling at a constant speed of 640 ft/sec as it passes over a ground radar tracking station. At that instant of time, the altitude of the plane is 1000 ft. How fast is the distance
  60. math

    an early flight lasted for 12 seconds. The plane flew 144 feet. What is the plane's speed in ft/s?
  61. Science

    a plane traveling 70mph drops a stone and it lands on the ground 8 seconds later. how high up is the plane?
  62. Trigonometry

    11. If a navigation error puts a plane 2.5° off course, how far off course is the plane after flying for 2 hours at 152 miles per hour?
  63. Science

    a plane traveling 70mph drops a stone and it lands on the ground 8 seconds later. how high up is the plane?
  64. physics

    A plane is cruising at 155.00 km/h increases it speed to 285.1 km/h in just 11.5 s as it makes a dive. What was the acceleration of the plane? a = vf - vi / t
  65. Calc 3

    At what point on the paraboloid y = x2 + z2 is the tangent plane parallel to the plane 7x + 2y + 3z = 2? (If an answer does not exist, enter DNE.)
  66. plz help asap

    It will take an hour for plane A to meet plane B which is flying towards it. If, within 45 minutes, the distance between them will be 200 miles, how far apart are they now?
  67. Physics

    A pilot stops a plane in 484 m using an acceleration of -8 m/s2. How fast was the plane moving before the breaking began? Thanks.
  68. science

    i need to draw a picture of nitrogen as a person, with the amount of protons, neutrons, electrons and the atomic number, all of which are 7, corresponding to the head, body, arms and legs. any ideas on how to draw this?
  69. English

    1. I ought to go by plane, shouldn't I? 2. I ought to go by plane, oughtn't I? ------------------------- Which tag question is right?
  70. geometry

    find the equation to the plane through the point (-1,3,2) and perpendicular to the plane (x+2y+2z=5) and (3x+3y+2z=8)
  71. Calc II

    What is the volume of the solid inside the cylinder x^2 + y^2=4 below the plane y=z, and above the xy-plane ?
  72. Math

    Find an equation of a plane through the point (2, -1, 0) which is parallel to the plane -1x-2y+4z=7.
  73. math

    3.Graph the points A(–5, 0 ), B(–4, 3), and C(0, –4) on the same coordinate plane. 2. Without graphing, identify the quadrant in which the point (x, y) lies if x < 0 and y < 0. (1 point) 3.Determine which ordered pair is a solution of y = –5x
  74. Math Word Problem

    In an NFL football game, the Bears scored a total of 41 poionts, including one safety (2 points) and two field goals (3 points each). After scoring a touchdown (6 points), a team is given the chance to score 1 or 2 extra points. The Bears, in trying to
  75. algebra 1

    A passenger plane and a jet leave att the same time from the same airport,traveling in opposite directions. The jet travels at twice the speed of the passenger plane. they are 2400 mi apart in 4 hours. Find the speed of the passenger plane and jet.
  76. Algebra

    I have a graph here. The vertex is (4,-4), then the points (3,-3) and (5,-3), then the points on the x axis are (2,0) and (6,0), then the points (1,5) and (5,5). This is a parabola that opens up. I'm asked to write a function for f(x) in standard form. I'm
  77. Physics

    A Block weighing 72.2 N rests on a plane inclined at 20.0 deg. to the horizontal. The coefficients of static and kinetic friction are 0.22 and 0.12 resp. What is the minimum magnitude of F that will start the block moving up the plane? (I also got 9,74 N
  78. physics

    a block of ice slides down a 45degree inclined plane in twice the time it takes to slide down a 45degree frictionless inclined plane. what is the coefficient of kinetic friction between the ice block and the plane?
  79. physics

    a block of ice slides down a 45degree inclined plane in twice the time it takes to slide down a 45degree frictionless inclined plane. what is the coefficient of kinetic friction between the ice block and the plane?
  80. Geometry

    I need to explain how to make a triangle using a protractor and a string and the aas congruence theorem. I'm giving no angles. I was thinking draw a line find and angle then draw another line to attach to the first line get another angle and finish off
  81. Math

    geometry- On the coordinate plane, draw a rectangle ABCD with vertices at A (1,4), B(5,4), C(5,1) and D (1,1). Then graph and describe the new rectangle formed when you subtact 3 from each coordinate of the vertices in rectangle ABCD.
  82. math

    Draw a diagram to show that there are two tangent lines to the parabola y = x2 that pass through the point (0, −25). Find the coordinates of the points where these tangent lines intersect the parabola.
  83. Physics

    A plane is flying 250 m/s west with a crosswind of 25 m/s north affecting the flight. What is the magnitude and direction of the plane?
  84. physics

    a pilot stops a plane in 484 m using a constant acceleration of -8.0 m/s^2 . How fast was the plane moving before braking began ?
  85. physics

    A plane is traveling at 300 m/s drops a bomb which hits it target 10 sec later. How high was the plane flying?
  86. physics

    A small plane starts down the runway with acceleration 7.4 .if the force provided by its engine is 1.5×104 , what is the plane's mass?
  87. Physics

    A 3.01 kg block slides down a frictionless plane inclined 18.6° to the horizontal. If the length of the plane's surface is 1.47 m, how much work is done, and by what force?
  88. vectors HELP!

    determine an equation of the plane that is perpendicular to the plane x+2y+4=0, contains the origin, and has a normal that makes an angel of 30 degrees with the z-axis.
  89. Math

    1. Name the intersection of plane ACG and plane BCG. A. AC B. BG C. CG D. The planes need not intersect. Is the answer C? this is hard for me since there isn't a picture. Thank you!
  90. Physics

    A plane is circling the airport. It takes 35 min to do one circle with a radius of 5.0 x 10^4 m. The plane weighs 6.05 x 10^4 kg. What the angular velocity
  91. maths

    plane leave jammu at 5 am and reached patna at 7.20 am flying at a speed of 600 km/h what will distance coveredby plane
  92. Science

    A ring roll down along an inclined plane starting at a height 4m. Find the velocity when it arrives at the base of the plane. (y 2.5m) ?
  93. math

    Stewart is playing a video game. He earns the same number of points for each prize he captures. He earned 1,200 points for 6 prizes, 2,000 points for 10 prizes, and 2,600 points for 13 prizes. Which is the dependent variable in this situation? A)the number
  94. Geometry

    The next step is to construct side PS of the figure so that side PS is parallel and congruent to side QR. The chart below shows the steps each of the four students took to draw side PS: Student 1 Fix the compass at M and adjust its width to point L.
  95. geometry

    Plot the points (2,4), (-1,4) and (2,1) and connect them to form a triangle. What rule would you use to translate the triangle 5 units to the right? Write your rule in the form H(x,y) = (?,?). Draw the translated figure and label its coordinates
  96. geometry

    Plot the points (2,4), (-1,4) and (2,1) and connect them to form a triangle. What rule would you use to translate the triangle 5 units to the right? Write your rule in the form H(x,y) = (?,?). Draw the translated figure and label its coordinates.
  97. Calc

    Two commercial airplanes are flying at an altitude of 40,000 ft along straight-line courses that intersect at right angles. Plane A is approaching the intersection point at a speed of 427 knots (nautical miles per hour; a nautical mile is 2000 yd or 6000
  98. Calc

    Two commercial airplanes are flying at an altitude of 40,000 ft along straight-line courses that intersect at right angles. Plane A is approaching the intersection point at a speed of 427 knots (nautical miles per hour; a nautical mile is 2000 yd or 6000
  99. Math - distance b etween a line and plane

    Find the distance between the parallel line and the plane. line: vector r = [2,0,1]+t[1,4,1] plane: 2x-y+2z=4
  100. Physics

    Two blocks of weights 77.0 and 114.0 N are connected by as massless string and slide down an inclined plane making an angle of 45.0 deg. to the horizontal. The cofficient of kinetic friction between the lighter block and the plane is 0.15 and that between