1. computers

    digital logic design ( i have a lot questios so please help me) Proof that: A¡¦.B + B¡¦.C¡¦ + A.B + B¡¦.C = 1 Q3 [2 points], According to DeMorgan theorem, the complement of W . X + Y . Z is W¡¦ + X¡¦ . Y¡¦ + Z¡¦ Yet both functions are 1
  2. Ohysics

    An airplane flying at 120km/h due west moves into a region where the wind is blowing at 40km/h due east. If the plane's original vecotr velocity is Vplane, what is the expression for the plane's resulting velocity in terms of Vplane. a. 1/3 >Vplane b.
  3. Geometry 5 questions

    What is the image of point P (-2, 3, 5) after a reflection about the xy-plane? a. P' (-2, -3, 5) b. P' (2, 3, 5) c. P' (2, -3, -5) d. P' (-2, 3, -5) #2: What is the image point R (4, -1, -3) under the translation T (x, y, z) → T' (x - 2, y + 1, z - 4)?
  4. bio

    How do you draw a tetrapeptide from the one letter codes(Amino acids) and also give the pI, if given the pKa values? For example the Amino acids: S,T,G,L i need some guidance, so i just look up the codes and draw them attached to each other form n-terminus
  5. maths

    Let ABC be a triangle.Draw median AD on BC.Draw median AE of triangle ABD on BD.Take a point on side AB say F and join CF. Now from D make a line parallel to CF such that the line cuts AB at G. Note- G lies between F and B. AD intersect CF and P. AE
  6. Geometry

    Point D is on the interior of angle ABC. Use the given information to find m angle DBC. (Draw the picture.) M angle ABC = (5x +6) M angle ABD = (7x - 9) M angle DBC = (5x - 6) Answer so far: (5x + 6) + (5x - 6) = (7x - 9) 10x = 7x - 9 10 x - 7x = -9 3x =
  7. Physics

    A plane is flying in the horizontal plane. At time t1= 0 s with the components of its velocity are vx= 100 m/s and vy= 120 m/s. At time t2= 20 s the components are vx= 80 m/s and vy = 142 m/s. a. What was the change in the direction of the velocity? b.
  8. English

    For a Raisin in the Sun, I have to draw and label a diagram of the stage. On the page, typed are: up stage, down stage, audience, stage right, and stage left. I don't get it, like what am I supposed to do, draw the kitchen, the couch in the living room, or
  9. Physics

    a jetliner traveling northward is landing with a speed of 80 m/s. Once the jet touches down, it has 800 m of runway in which to reduce its speed to 10 m/s. (a) Compute the average acceleration (magnitude and direction) of the plane during landing (take the
  10. Math

    Alex scored 13 points in the basketball game. This was 1 fifth of the total points the team scored. Write and solve an equation to determine the total points t the team scored. What is the equation?
  11. Algebra

    A turbo-jet flies 50 mph faster than a super-prop plane. If a turbo-jet goes 2000 miles in 3 hours less time than it takes the super-prop to go 2800 miles, find the speed of each plane. I do not understand how to do this at all. Please explain as well as
  12. physics

    A plane flying horizontally at a constant velocity drops a bomb on a cave from a height of 500 m. At the moment the bomb hits the ground, the plane is A.) 250 meters beyond the cave B.) Directly over the cave C.) 250 meters from the cave D.) Some other
  13. Geometry

    So the directions say: Provide a counterexample to show that each statement is false. You can use words or make a diagram. These are the two questions that I'm stuck on: 1. If a line lies in a vertical plane, then the line is vertical 2. If x^2=49, then
  14. PHYSICS

    A closed loop carrying a current I lies in the xy plane. A uniform magnetic field is directed along the positive y axis. Which of the following statements best describes the total magnetic force on the current loop? a)The total magnetic force is
  15. physics

    A mass of 20 kg on a plane inclined at 40 degrees. A string attached to that mass goes up the plane, passed over a pullley and is attached to mass of 30 kg that hangs verticalyy. a) find the acceleration and it's dirction b) the tension in the string.
  16. Biology

    I am given the structual formula for lactose howere i have to write out the equation for the hydrolosis of lactose is the following what is required C12H22O11 +H2O>>> C6H12O6 +C6H12O6 all the numbers are subscript, would appreciate if someone would guide
  17. physics

    A plane, diving with constant speed at an angle of 51.5° with the vertical, releases a projectile at an altitude of 654 m. The projectile hits the ground 6.40 s after release. (a) What is the speed of the plane? (b) How far does the projectile travel
  18. trig

    An airplane has an airspeed of 450 kilometers per hour bearing Upper N45E. The wind velocity is 60 kilometers per hour in the direction Upper N30W. Find the resultant vector representing the path of the plane relative to the ground. What is the ground
  19. Physics

    A block of mass 12 kg starts from rest and slides a distance of 8 m down an inclined plane making an angle of 40◦ with the horizontal. The coefficient of sliding friction between block and plane is 0.4. The acceleration of gravity is 9.8 m/s^2 What is
  20. math

    in a game you draw a card with three consecutive numbers on it. You can choose one of the numbers and find the sum of its prime factors. then you can move that many spaces. You draw a card with numbers 25, 26, 27. Which number should you choose if you want
  21. physics

    In order to change the angular momentum of an object, it is necessary to apply a. a net force to the object. b. a net torque to the object. c. a centripetal acceleration to the object. d. both a net force and a net torque to the object. We have three
  22. Math

    Given two non-collinear vectors a and b, show that a, axb, and (axb)xa are mutually perpendicular. Also Express the unit vectors i, j, and k as ordered triplets and show that i x j = k what are ordered triplets? Using components show that u x v = -v x u
  23. math

    draw one set of letter from set 1 and place in set 2 draw one letter from set 2 place in set 3 now draw one letter from set 3 what is the probability that the last letter drawn is b? set 1 = bcb set 2 = bb set 3 = b
  24. PHI103

    1. "P v Q" is best interpreted as (Points : 1) P or Q but not both P and Q P or Q or both P and Q Not both P or Q P if and only if Q 2. What is the truth value of the sentence "P & ~ P"? (Points : 1) True False Cannot be determined Not a sentence 3. If P
  25. algebra

    An airplane encountered a head wind during a flight between Joppetown and Jawsburgh which took 5 hours and 30 minutes. The return flight took 5hours. If the distance from Joppetown to Jawsburgh is 1600 ​miles, find the airspeed of the plane​ (the
  26. Physics

    At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the
  27. physics

    In the figure: an electron is projected along the axis midway between the plates of a cathode-ray tube with an initial velocity of 2 x 107 m/s. The uniform electric field between the plates has an intensity of 20,000 N/C and is upward. (a) How far below
  28. precalculus

    graph y=sin(x-pie/4) (couldn't find pie sign on my keyboard) Use 3.1459 We can't draw graphs for you here, but you can certainly make a table of values of x and corresponding values of y, and draw the graph yourself. you might save a little time by
  29. physics

    An Alaskan rescue plane traveling 37 m/s drops a package of emergency rations from a height of 149 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s 2 . Where does the package strike the ground relative to the point directly below
  30. elementary

    Plane A left Vancouver for Winnipeg, a distance of 2232 km, travelling at an average speed of 560km/h. At the same time, Plane B left Winnipeg for Vancouver travelling at an average spped of 430km /h. how long after take-off did the planes pass each other?
  31. physics please urgently

    A body whose weight is W1=75N is tied to another body whose weight is W2=45N .If the coefficient of kinetic friction between W1 and the inclined plane (25°)AB is 0.15,calculate the coefficient of kinetic between W2 and the inclined plane(15°) BC when the
  32. MATH.... HELP

    Toronto and Vancouver are 3150km apart. A plane cruises at about 850km/hour. At this rate about how long (in hours and minutes) will it take to fly to Vancouver from Toronto? If he left Vancouver at 10:00 am and Toronto is 4 hours ahead of Vancouver what
  33. Science

    A vertical load of 100N is supported by two chains, A and B, in the same vertical plane. The force in A is 50N and acts in a line at 30 degrees to the horizontal plane (i.e. at 120 degrees to the 100N load). Determine the force in chain B and the angle
  34. Algebra

    A jet plane traveling at 550 mph overtakes a propeller plane traveling at 150 mph that had a 22​-hour head start. How far from the starting point are the​ planes? The planes are ____ miles from the starting point.
  35. physics

    A body whose weight is W1=75N is tied to another body whose weight is W2=45N .If the coefficient of kinetic friction between W1 and the inclined plane (25°)AB is 0.15,calculate the coefficient of kinetic between W2 and the inclined plane(15°) BC when the
  36. algebra

    A plane takes 3 hours to travel 1500 miles with the wind. it can travel only 1380 miles against the wind in the same amount of time. Find the speed of the wind and the speed of the plane in still air.
  37. math,help

    I have a graph which points are: (-1,-2),(0,2),(1,4) would the equation for this line be y=3x+1 No. These points do not lie on a line. If you read the points off of a graph, you read them wrong.
  38. physics

    1.Three masses, m1, m2, and m3, are lying on a plane without friction and are connected by a string. A force F is applied to the mass m1 so that the whole system accelerates along a straight line. What is the tension of the string T between the masses m1
  39. calculus

    an airplane flying due east at 400 km/h pasess over an airport 12 minutes before a second plane flying south 30 degrees west at 500 km/h.if the airplanes are at the same altitude how fast will they by seprating when the seccong pane is over the
  40. Math

    A plane was flying at an altitude of 30,000 feet when it began the descent toward the airport. The airplane descends at a rate of 850 feet per minute. a. What is the function rule that describes this situation? b. What is the altitude of the plane after it
  41. math

    A plane traveled 510 mph with the wind and 470 mph against the wind. Find the speed of the plane in still air and the speed of the wind
  42. physics

    Town A lies 20 km north of town B. Town C lies 13 km west of town A. A small plane flies directly from town B to town C. What is the displacement of the plane.
  43. MAtH

    The graph of y=1/2 and the graph of y=cosx intersect in an infinite number of points. What is the greatest possible slope of a line drawn from the origin to one of these points?
  44. Math

    If a circle has the radius of 6 and it is at the orgin, what are seven points on the circle. I already have four and I need three more. So far I have, (6,0) (0,6) (0,-6) and (-6,0). What am I missing. I also can't write any decimals for the points, but it
  45. Algebra 2

    If a circle has the radius of 6 and it is at the orgin, what are seven points on the circle. I already have four and I need three more. So far I have, (6,0) (0,6) (0,-6) and (-6,0). What am I missing. I also can't write any decimals for the points, but it
  46. Calculus

    Suppose f is continuous on [0, 6] and satisfies the following x 0 3 5 6 f -1 4 -1 -3 f' 5 0 -8 0 f" -1 -3 DNE 3 x 0
  47. Calculus

    Sketch the graph of f(x)=-x^4 + 4x^3 - 16x + 16: Find the critical points, concave up/down, inflection points, vertical asymptotes and horizontal asymptotes.
  48. Math-please help!!

    Normally, the first 3 key points of a sine curve are (0,0), (90,1), and (180,0). If the function is changed to y=-2sin(3x-120)+5, the key points given above change to... Please explain this to me so that I can do it myself.
  49. english

    Based on the readings in Ch. 3, identify key points to keep in mind when writing a topic sentence. How might these key points help you write effectively?
  50. US HISTORY

    can somebody plz help me with this ques? According to the article of confederation what could the national government do? ( 5 points each for war, finance and native american) i got two points each plz help me.....
  51. science

    Boiling points and freezing points are examples of? a. physical properties b. matter c. chemical properties d. energy i am pretty sure it is a but i just need to have someone assure to me i am right
  52. math

    What are the coordinates of the points where the graphs of f(x)=x^3-x^2+x+1 and g(x)=x^3+x^2+x-1 intersect? Give your answer as a list of points separated by semicolons. (So "(1,-3); (2,3); (5,-7)" is a valid answer format.)
  53. Algebra

    What are the coordinates of the points where the graphs of f(x)=x^3-x^2+x+1 and g(x)=x^3+x^2+x-1 intersect? Give your answer as a list of points separated by semicolons. (So "(1,-3); (2,3); (5,-7)" is a valid answer format.)
  54. Physics please help

    The difference in potential between any two points in a field is the ___ required to move a unit of whatever is affected by the field between the two points. I need help with this. Could it be work? or energy? Please help
  55. Calculus

    A continous function y=f(x) crosses x-axis at points x=-3,0,2,5. Use mean value theorem to show that function has three critical points? I am stuck in this question kindly help
  56. Reading

    Rebecca wondered if the type of papre used to make a paper airplane would affect the distance the plane flew.She hypothesized that an airplane made of light weight paper would fly farther than an airplane made of heavier paper.Rebecca made 5 airplanes.They
  57. Gr. 9 Math (continued)

    I don't see a problem but I will rewrite the structure. Make two rectangles attached together. Call the first rectangle ABHG (AG top, BH bottom). Call the second rectangle GHCD (HC top, GD bottom). Draw a horizontal line from line AB to line GH and name
  58. phsyics

    An airplane with an airspeed of 60 km/hr lands on a runway where the wind speed is 40 km/hr. (a) What is the landing speed of the plane if the wind is head-on? (b) What is the landing speed if the wind is a tailwind, coming from behind the plane?
  59. maths

    A plane has to crash on the field which is 2km by 1.5km . There is a lake in the corner whose dimensions are 900m by 300 m (i) what is the probability that the plane will crash in the lake (ii) what is the probability that will crash other than lake.
  60. Physics

    A Coast Guard airplane needs to drop a rescue package to a ship floating adrift in the ocean. The plane flies 55 m above the ocean at a speed of 215 km/h. How far away from the ship should the crew drop the package out of the plane so that the package hits
  61. Algebra 2

    Jimmy is wanting to fence a rectangular area of his land along Elm Creek. He will only need to fence 3 sides. If Jimmy has 2000 ft of fencing and wants to enclose the largest possible area, determine the dimensions of the rectangular plot. Hint: Write an
  62. Chemistry

    How does the molar mass of molecules affect the boiling points? e.g MOlar masses HI-->127.9 HF--->20.07 HCl---> 36.45 Boling points HI-->-35.55 HF---> 20 HCl--->-114.17 can it be said that except for HF molecule, as molar mass increases the boling points
  63. Physics

    A plane drops a hamper of medical supplies from a height of 5210 m during a practice run over the ocean. The plane’s horizontal velocity was 133 m/s at the instant the hamper was dropped. The acceleration of gravity is 9.8 m/s^2. What is the magnitude of
  64. Calc III

    Find the absolute maximum of the function f(x,y) = x^2 + 4y on the set of points (x,y) that satisfy x^2 + y^2 < or = to 25. I understand that you have to check the endpoints and find critical points, but I cannot solve this. Thank you.
  65. Algebra 2

    What's the formula given three points to come up with the quadratic equation were your give points (x1, y1 ) (x2, y2) (x3, y3) I remember seeing some really long equation were you just plug the numbers into it and get your answer but I have forgotten the
  66. Math

    Gerrit attempted 54 free throws and made 27. What is the probability in a two attempt free - throw situation that he will make 0 points ? 1point ? 2 points ?
  67. math

    n points are arranged on a cirlce and all the chords drawn. Let I(n) be the number of intersection points inside the circle if no 3 chords are concurrent. Find a formula for I(n).
  68. pre algebra

    find a variable and writing and equation and solve. the hoe team scored 80 points and won by 19. How many points did the opposing team make?
  69. College Algebra

    Find the equation of the parabola y = ax2 + bx + c that passes through the points. To verify your result, use a graphing utility to plot the points and graph the parabola. (−2, −15), (−1, −4), (1/2,-10) y=?
  70. Math

    Sam ranks movies on a scale of 1-100. If he adds 2 points to each movie in his collection, and the range of the ranking was 54, what is the range when the 2 points are added ?
  71. math

    n points are arranged on a cirlce and all the chords drawn. Let I(n) be the number of intersection points inside the circle if no 3 chords are concurrent. Find a formula for I(n).
  72. business math please help me

    An invoice is dated August 29 with terms of 4/15 EOM. What is the discount date? (Points What is the net date for the scenario in the previous question? (Points : 2.5)
  73. algebra

    The mean score on Mr. Pascal’s first semester exam for his 28 students is 73 points. If he removes the lowest score of 19 points, what is the adjusted class average (arithmetic mean)?
  74. Math

    Can some one explain the step of the following: 1. Graph the system of Inequalities (What will be the points) y>= -4 x>=5 2. Solve by the substitution method 5x+3y= 7 x=59-7y 3.Graph the equation using the slope and the y-intercept (What are the points) y=
  75. math

    An invoice is dated August 29 with terms of 4/15 EOM. What is the discount date? (Points : 2.5) 12. What is the net date for the scenario in the previous question? (Points : 2.5)
  76. Physics

    When a charge of -4 x 10 to the minus 3 coulombs is moved between two points in an electric field, 0.8 joules of work are done on the charge. The potential difference between the two points is 300 V.
  77. math

    sheldon has scored six eighteenths of points in a basketball game. how can you use division to simplify the fraction of the points he score? what is six eighteenths in simplest form?
  78. Alg 1

    The mean score on Mr. Pascal’s first semester exam for his 28 students is 73 points. If he removes the lowest score of 19 points, what is the adjusted class average ? (arithmetic mean)
  79. physics

    A hollow 0.358 kg sphere rolls without slipping down an inclined plane that makes an angle of 41.0o with the horizontal direction. The sphere is released from rest a distance 0.734 m from the lower end of the plane. a. How fast is the hollow sphere moving
  80. physics

    A hollow 0.358 kg sphere rolls without slipping down an inclined plane that makes an angle of 41.0o with the horizontal direction. The sphere is released from rest a distance 0.734 m from the lower end of the plane. a. How fast is the hollow sphere moving
  81. intermediate algebra

    Write the equation of the line: The points are at (-8,-6) and (0,0). The line passing through these two points has a y-intercept of 0 since it passes through the origin. The slope is -6-0/-8-0=3/4 How would I finish this? Thanks
  82. math

    Plot the points A(2,2), B(4,6),C(10,-2)Notice that these points are vertices of a right triangle (the angle is 90 degrees). Find the area of the triangle ABC:
  83. 11th grade

    volatile liquids with lower boiling points give better results than those with higher boiling points. suggest a reason for this.
  84. physical science

    As the number of carbon atoms in the compound increases, what pattern do you see in the boiling points? What general pattern do you see in the melting points?
  85. cal

    Sketch the graph and show all local extrema and inflection points. f(x)= 1/x^2-2x-8 I believe the ans is "Relative max: [1,-1/9]" and No inflection points".
  86. English

    Here is the second part of my summary. Can you please check if everything is OK now? By the way, do you say "On which carriage or in which carriage is your seat?" Which bus number goes to the city centre OR Which number bus goes ....? 1) Go into the
  87. Chemistry

    I had a lab about calorimetry where we would have a temperature probe in a calorimeter cup and then pour hot water into it to form a mixture until our graph (automatically plotted from the data that's recorded by the computer). Now for the report they ask
  88. business

    A business is considering two sizes for its new warehouse: small and large. An analysis of the profits realized given two states of demand, low and high, are summarized in the table below. Figures are in tens of thousands of dollars per month Demand Low
  89. PHYSICS(HELP!!!!!)

    An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position. The forces acting to stop the airliner arise from friction due to the wheels and from the breaking effort of the engines in
  90. Physics (elena) help!!!

    An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position. The forces acting to stop the airliner arise from friction due to the wheels and from the breaking effort of the engines in
  91. Physics(IMPORTANT)

    An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position. The forces acting to stop the airliner arise from friction due to the wheels and from the breaking effort of the engines in
  92. Physics

    Two golf balls of equal size and mass are released simultaneously from the roof of a building. One of the balls has a smooth surface while the other one has grooves on it. They then hit on a hard and horizontal plane on the floor. Assume that the golf
  93. english

    9. What kind of complement is the underlined word? Fill the bucket with potting soil. (Points: 5) direct object indirect object predicate nominative predicate adjective 10. What kind of complement is the underlined word? This jigsaw puzzle is too easy for
  94. question+ stuck

    how is the graph of f(x)= x^2-4x be used to obatin the graph of y=g(x)? I am stuck and unsure how to get out of this one so can you please help? thanks! You must define g(x). Is g(x) the inverse function of f(x)? well the function f(x)= x^2-4x has two
  95. Math

    Five children play a game in which players either gain 1 point or lose 1 point. After several games, the number of points won is equalto the number of points lost. If no two children have the same final score and the overall winner has fewer points than
  96. math

    A plane P cuts a sphere O in a circle that has a diameter of 20. If the diameter of the sphere is 30 how far is the plane from O?
  97. math

    on a scale drawing, the length of a plane is 45 cm. The actual length of the plane is 90 m. What is the scale used?
  98. Geometry

    if plane angle DAB = (67 + 4x) degrees, than wht is plane angle DAB?
  99. physics

    1) what is the efficiency of a frictionless inclined plane? 2) how would you increase the efficiency pf an inclined plane?
  100. calculus: multivariable

    Find the points on the hyperboloid x2 −y2 +2z2 = 1 where the normal line is parallel to the line that joins the points (3,−1, 0) and (5, 3, 6). Please show me how to do it..the answer is [+- rad 6/(3), +- 2rad 6/(3), +- rad6/(3)]