1. Linear Algebra

    1. Considering 2 planes with equations: x + 2y - 3z = 1 x + 2y - 3z = 18 (a) Given (a,b,c) a point on the first plane, find the point where the line perpendicular to both planes passes by (a,b,c) and through the 2nd plane.

    asked by Ben on October 11, 2012
  2. chem

    How many structural isomers of dicloro,hydroxy,butanoic acid are there? Is there a website that has the structure with names??? The point of this question is to get you to draw the compound, then move the cloro and hydroxyls and count the variations. So

    asked by Nisar on September 2, 2005
  3. science

    The basketball team needs to score at least 420 points this season to set a new school record. So far it has scored 82 points. Which inequality represents the number of points that need to be scored to set a record?

    asked by kid on December 13, 2018
  4. Math Help

    In three math tests, you have scored 91,95 and 88 points. You are about to take your next test. Suppose you want to have an average score of at least 90 points after all four tests. Explain a method you could use to find the score you must receive in order

    asked by Anonymous on February 8, 2016
  5. Physics

    "An airplane is climbing at an angle of 15 degrees to the horizontal with the sun directly overhead. The shadow of the airplane is observed to be moving across the ground at 200 km/h. How long does it take for the plane to increase its altitude by 1000 m"?

    asked by Stuck on July 6, 2010
  6. Physics

    Two blocks A and B are connected by a light in extensible cord passing over a frictionless pulley. Block A starts from rest and moves up the smooth plane which is inclined at 30 degrees to the horizontal. Calculate at the moment that A has moved 4 m along

    asked by Ariana on June 1, 2014
  7. math

    The final exam is worth 250 points. How many points do yu need on the exam to earn 93% of the total points ? What percent do yu need on the final?

    asked by annonymous on December 5, 2012
  8. Calculus

    Function is y=x2 . Take three points, x=2, x=3, x=4. Approximate this function at these three points for a deviation Δx =0.1. Which of the three points does the approximation works best? Which point does it works worst?

    asked by Jack on April 6, 2016
  9. Math

    Calculate the perimeter of the triangle formed by the middle points of the sides of the triangle formed by points A(-8,6) B (2,5) and C (1,7) I've already got the distance between all the points given but I do not know what to do next. Can you help me?

    asked by Julius on June 5, 2016
  10. Math HELP

    #1 find the value of x if RS = 4(x-3)+6 and RT = 5(2x-6). x= 12 x= 6 x= 4*** x= 3 #2 which of the following statements are always true? Choose all that apply. If the circumcenter of a triangle lies on the triangle, then the triangle is a right triangle.

    asked by Tony on October 16, 2018
  11. integer addition and subtraction

    I need help please help I'm behind and b and have a test about integer addition and subtraction The question:Tyler and Christina are playing a game in which each player either wins loses or draws,0 points are awarded.For the first eight rounds Tyler had

    asked by Jackie on December 8, 2014
  12. Grammar

    Exercise C: (1) Select one of the subjects below. (2) Make a list of ideas to support your subject. (3) Decide what you main points should be and group the other ideas under them. (4) Prepare the outline according to the proper form. Make sure your points

    asked by Losa on September 9, 2012
  13. Physics

    The figure below shows two pint charges, each of -2Q, fixed on the y-axis at y = +a and at y = -a . A third points charge -Q is placed on the x-axis at x = 2a . Express all algebraic answers in terms of Q, a, and fundamental constants. (a) What is the net

    asked by David on September 5, 2010
  14. calculus

    given the following function find, a. zeros and the multiplicity of each b. number of turning points c. end behavior f(x)=(x-1)(x-5) a. x=1 and x=5--is this correct? b. number of turning points I had f(x)-0 BUT my teacher said this-- Note that the equation

    asked by Jimmy-can someone please help on December 19, 2012
  15. 4th grade

    DRAW AND LABEL RAY SL. DRAW AND LABEL POINT R ON IT

    asked by JUANITA on September 11, 2009
  16. math

    Draw and label line BN. Draw and label point T on it

    asked by lenny on September 19, 2012
  17. Geometry

    PLease check my answer. Which of these is a step in constructing an inscribed circle using technology? A. Construct segment DB, segment CE, segment GI, and segment ID. B. Create circle A with point B on the original circle. *** C. Create circle E which

    asked by Help me please on September 14, 2016
  18. math help needed

    the bookholder company maunfactures two types of bookcases out of oak and walnut. model 01 requires 5 board feet of oak and 2 board feet of walnut. model 02 requires 4 board feet of oak and 3 board feet of walnut. a profit of $75 is made on each model 01

    asked by michael on June 6, 2007
  19. Math

    In a basketball game Maria scored 3 times as many points as Holly. In the next game, Maria scored 7 fewer points than she did in the first game, while Holly scored 9 more points than she did in the first game. If they scored the same number of points in

    asked by Stephanie on September 25, 2013
  20. math

    Each time Lucy uses her credit card she earns points from the credit card company. For every 100 dollars she spends she earns 50 points. Choose the equation that accurately represents the relationship between the two variables: m = amount of money spent,

    asked by weed on October 14, 2014
  21. Math

    Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 400 more points than Katie. If you let l= l= the number of points that Lisa scored, and k= k= the number of points that Katie scored, then the problem can be

    asked by Andy on May 30, 2016
  22. story problem

    Two wires stretch from a pole to two points on the ground which are 25 feet apart. The first wire is to the left of the pole and forms a 30° angle with the ground. The second wire is to the right of the pole and forms a 60° angle with the ground. How

    asked by Alyssa on April 20, 2017
  23. math

    Following are three sets of letters. Draw one letter from Set 1 and place it in Set 2. Then draw one letter from Set 2 and place it in Set 3. Finally, draw a letter from Set 3. What is the probability that the last letter drawn is a B? B C B B B B Set 1

    asked by Tasha on April 5, 2010
  24. math

    Following are three sets of letters. Draw one letter from Set 1 and place it in Set 2. Then draw one letter from Set 2 and place it in Set 3. Finally, draw a letter from Set 3. What is the probability that the last letter drawn is a B? B C B B B B Set 1

    asked by Tasha on April 5, 2010
  25. Math

    There are twenty balls in the bag. Twelve are white, six are orange and two are pink. When I draw a ball from the bag, I remove it. What is the probability that my first draw is a white ball and my second is not?

    asked by Sarah on January 21, 2012
  26. Economics

    I have the following question in my assignment: The cost of producing stero systems has fallen over the past several decades. A:Use the supply-and-demand diagram to show the effects of fallaing production costs on the price and quantity of steros sold.

    asked by G on March 11, 2008
  27. physics incline

    A cord connected at one end to a block which can slide on an inclined plane (incline 27 degrees) has its other end wrapped around a cylinder resting in a depression at the top of the plane (and the other angle at bottom is not a right angle, but 58

    asked by andy on May 22, 2009
  28. Math

    1. the points given are two of the 3 vertices of a right triangle. Which could be the third vertex of the triangle given 2 points are (-4,-5) & (3,2) ? 2.) A circle with center O and radius r is intersected at 2 distinct points by line l. Which is true? a.

    asked by Sophia on November 9, 2015
  29. Physics

    A jetliner can fly 6.50 hours on a full load of fuel. Without any wind it flies at a speed of 2.15 102 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip. During

    asked by Brian on September 20, 2010
  30. Calculus

    (Another related rate question) A plane (alt. 4000ft) is flying west at 700ft/sec. A searchlight under its path, tracks it. How fast if the light pivoting when the plane is 1000ft east? --- Kind of similar to the lamp post question I posted earlier. I know

    asked by Nikki on September 12, 2010
  31. Science

    An airplane has to fly eastward to a destination 856 km away. If wind is blowing at 18.0 m/s northward and the air speed of the plane is 161 m/s. In what direction should the plane head to reach its destination. So I know the direction is south east but

    asked by Jane on April 30, 2008
  32. Statistics

    statistics (mean, median, mode): X=3 and the first score is 2 points above and the second score is 4 points above how many points below is the third?

    asked by N/A on September 23, 2011
  33. Math

    You score 15,16,17,14, and 19 points out of 20 possible points on five tests. what must you score on the sixth test to have of at least 16 points?

    asked by Wendy on November 12, 2015
  34. physics

    A spring (k=200N/m) is fixed at the top of a frictionless plane inclined at an angle of 40 degrees. A 1 kg block is projected up the plane from an initial position that is distance d=0.60m from the end of the relaxed spring, with an initial kinetic energy

    asked by James on August 1, 2010
  35. physics

    A spring (k=200N/m) is fixed at the top of a frictionless plane inclined at an angle of 40 degrees. A 1 kg block is projected up the plane from an initial position that is distance d=0.60m from the end of the relaxed spring, with an initial kinetic energy

    asked by James on July 27, 2010
  36. ap chem

    The allene molecule has the following Lewis structure: H2C=C=CH2. Are all four hydrogen atoms in the same plane? The allene molecule has the following Lewis structure: H2C=C=CH2. Are all four hydrogen atoms in the same plane? If not, what is the spatial

    asked by mary on December 28, 2012
  37. Geometry

    Ok, this is going to be confusing to write, but I'll do my best...

    asked by BlueEyedGrrl1738 on October 17, 2007
  38. Calculus

    RP^2=RQ^2 + QP^2 -2(RQ)*(QP)cosQ (1) QP = 24 (km/min) t (2) Diffentiate both sides w.r.t. the time t: 2 RP* d Rp/dt = 2 t [24 (km/min)]^2 -2(RQ)* 24 (km/min) cosQ (3) Using (1) and (2) you find out what RP is at t = 4 minutes. You plug that into (3) and

    asked by Count Iblis on November 15, 2006
  39. probability

    A game of darts involves throwing two darts at the board. Hitting a blue region with a dart scores 1 point; a red region, 2 points, a green region, 3 points, and the orange region, 5 points. Assume that no skill is involved. What is the probability, stated

    asked by nathon on April 6, 2011
  40. calculus

    An airplane is cruising at 340 km/h at an altitude of 4000 m. If the plane passes directly over an observer on the ground, how fast is the distance from the plane to the observer changing when it is 3000 m away from the point directly above the observer?

    asked by Lori on October 16, 2012
  41. math

    In a storm, a plane flew against the wind and took 9 hours to cover 3,600 miles. The return trip, traveling with the wind, took 1 hour less. find the air speed of the plane, and the speed of the wind.

    asked by zack on April 5, 2011
  42. Physics

    A flight controller determines that an airplane is 20.0 south of him. Half an hour later, the same plane is 46.0 northwest of him. If the plane is flying with constant velocity, what is the direction of its velocity during this time? What is the magnitude

    asked by Anonymous on May 24, 2013
  43. algebra

    17. In the last basketball game, Kevin scored 2 less than a third of his team's points. Part A: Let n represent the number of points Kevin's team scored. Write an expression for the number of points Kevin scored. Part B: Kevin scored 14 points. How many

    asked by Anonymous on April 14, 2016
  44. Math

    In the last basketball game, Kevin scored 2 less than a third of his team's points. Part A: Let n represent the number of points Kevin's team scored. Write an expression for the number of points Kevin scored. Part B: Kevin scored 14 points. How many points

    asked by Manny on February 10, 2017
  45. physics

    A toy plane of mass 0.624 kg is flown in a circle when attached to a string. The plane moves around the circle with a rotational speed of 8.09 rpm. The length of the string is 2.60 m. What is the tension in the string?

    asked by al on January 4, 2013
  46. Physics

    A toy plane of mass 0.624 kg is flown in a circle when attached to a string. The plane moves around the circle with a rotational speed of 8.09 rpm. The length of the string is 2.60 m. What is the tension in the string?

    asked by Alex on January 3, 2013
  47. Physics

    A 4.6-kg block slides down an inclined plane that makes an angle of 26° with the horizontal. Starting from rest, the block slides a distance of 2.6 m in 4.9 s. Find the coefficient of kinetic friction between the block and plane.

    asked by Kayla on October 12, 2011
  48. Physics

    A 4.0-kg block slides down an inclined plane that makes an angle of 25° with the horizontal. Starting from rest, the block slides a distance of 2.5 m in 5.4 s. Find the coefficient of kinetic friction between the block and plane.

    asked by Maddie on June 27, 2016
  49. physics-newton's laws

    an aeroplane is flying in a horizontal circle with airspeed of 480 km/h. The wings of the plane are tilted at 40 degrees to the horizontal. What is the radius of the circle and how long does it take the plane to complete one full circle?

    asked by mani on October 13, 2010
  50. Physics

    A 4.3-kg block slides down an inclined plane that makes an angle of 26° with the horizontal. Starting from rest, the block slides a distance of 2.1 m in 5.1 s. Find the coefficient of kinetic friction between the block and plane.

    asked by Jen on October 12, 2011
  51. Math

    Alex scored 13 points in the basketball game. This was 1/5 of the total points the team scored. Write and solve an equation to determine the total points t the team score.

    asked by rachel on September 25, 2012
  52. PHYSICS

    A plane flying horizontally at 180 m/s drops a box just as it crosses a coastline. The box lands 3 kilometers from the coast. - At what height is the plane flying? - How long it takes to the box to reach the ground ?

    asked by LEZA91 on March 22, 2014
  53. English

    Formative Test Now, let's check how well you can use the expressions you've learned. I will distribute handouts. You have to solve the problems. You will have 5 minutes. Are you finished? Then, I'll write down the answers. Look at the answers on the

    asked by rfvv on October 20, 2014
  54. Physics

    Can you please show me how these answers are reached. A fully loaded Cessna-182 airplane of mass 1290 kg has an engine failure when flying with an airspeed of 139 km/h at an altitude of 2670m on a calm day. It then glides at a constant glide angle (which

    asked by Kelly on March 11, 2011
  55. Physics

    Three collinear charges +7.0 x10^-5 C , +4.8 x10*-5 C, and -8.0 x 10^-5 C exert forces on each other. The first and second charges are 35.0 cm apart. The second and third charges are 35.0 cm apart. What is the magnitude and charge of the total force on the

    asked by Anonymous on March 19, 2015
  56. math

    Given line segment AB on Line L, and a collinear point M, which must be true? a. M is on line L **** b. M is between A and B c. M is on line segment AB d. M is the midpoint of A and B

    asked by Anonymous on October 3, 2018
  57. Probability

    placed marbles in a bag. 6 of the marbles are red and 4 of them are yellow. reach into the bag and remove two marbles. a.) i.) What is the probability that both of the marbes you draw out are red? ii.) What is the probability that both of the marbles that

    asked by Jason on December 8, 2014
  58. Physics

    An airplane, traveling 142.5 km/hr at the moment it touches the runway, runs off the end of the runway still traveling at 36.7 km/hr. If the plane’s rate of deceleration was -1.6 m/s2, how long and how far did the plane travel along the runway?

    asked by Michelle on September 25, 2016
  59. phisecs

    .: A 5.0 kg block is moving with constant velocity down a rough incline plane. The coefficients of static and kinetic friction between the block and the incline are 0.25 and 0.20, respectively. What is the inclination angle of the incline plane?

    asked by w on March 24, 2014
  60. Linear Algebra

    Last number from the sample test! A plane P passes by the coordinates: A(1,0,-7); B(-2,-1,0); C(0,0,-3) Using the equation of the line D: x= 7+12t, y= -1-6t, z= 2-2t, Find the equation of a line that's entirely part of the plane P and that is perpendicular

    asked by Robert on September 10, 2012
  61. helth

    1. Health related factors refer to coordination, agility, power, speed, balance, and reaction time. (1 point) * True (1 point) * False (0 points) 2. There are some aspects of fitness that we have little or no control over. (1 point) * True (0 points) *

    asked by helpppp on September 16, 2016
  62. math

    I'm not sure how to work this problem out. Find it very confusing and my answer keeps changing. Please help. From an observation tower that overlooks a runway, the angles of depression of point A, on one side of the runway, and point B, on the opposite

    asked by Denisha on August 23, 2011
  63. Physics

    A 5.1 kg block slides down an inclined plane that makes an angle of 26 degrees with the horizontal. Starting from rest, the block slides a distance of 2.9 m in 4.6 s. The acceleration of gravity is 9.81 m/s2 . Find the coefficient of kinetic friction

    asked by Jackson on March 13, 2011
  64. Science

    1.Asolid sphere has amoment of inertia of 0.8kgm2&diameter 10cm rolls down along an inclined plane of length 80cm which is inclined at 37` to the horizontal .What is the transitional momentum of the sphere as it reaches to the foot of the inclined plane?

    asked by Melkamu on June 3, 2016
  65. Algebra

    How do you sole the problem below? Kevin flies a plane against a headwind for 5600 miles. The return trip with the wind took 10 hours less time. If the wind speed is 5 mph, how fast does Kevin fly the plane when there is no wind?

    asked by Tom on December 14, 2014
  66. physics

    A centreate block mass 25kg is placed on a wooden plant inclined at an angle 32 dergree to the horizontal calculate the force parallel to the inclined plane that would keep the block rest .If the cofficient of fricition between the block and the plane is

    asked by awoyele tobi on November 8, 2016
  67. physics

    A box slides down a plane 8 m long that is inclined at an angle of 30 degrees with the horizontal. If the box starts from rest and u = 0.25, find a.) the acceleration of the box, b.) it's velocity at the bottom of the plane, and c.) the time required for

    asked by Alex on October 23, 2012
  68. physics

    A 5.4 kg block slides down an inclined plane that makes an angle of 38 with the horizontal. Starting from rest, the block slides a distance of 2.5 m in 5.3 s. The acceleration of gravity is 9.81 m/s2 . Find the coefficient of kinetic friction be- tween

    asked by Sara on March 15, 2011
  69. chemistry

    (c) some properties of the two compounds are listed below: compound X: compound Y: melting point -144C -138C boiling point 78C -22C net point Yes Yes functional group Alcohol Ether (i.) Draw plausible Lewis Structures of compounds X and Y. (ii.) In which

    asked by Tnurr on February 10, 2010
  70. SAT math

    If five distinct lines lie in a plane, then at most how many distinct points can lie on two or more of these lines? 6 7 8 9 10.

    asked by Grace on August 20, 2011
  71. consumer math

    Your parents are buying a house for $180,000. They have a good credit rating, are making a 20% down payment, and expect to pay $1,500/month. The interest rate for the motrgage is 4%. What must their realized income be before each month and how much

    asked by jeanette on April 17, 2013
  72. physics

    When a jet lands on an aircraft carrier, a hook on the tail of the plane grabs a wire that quickly brings the plane to a halt before it overshoots the deck. In a typical landing, a jet touching down at 240 km/h is stopped in a distance of 95 m. What is the

    asked by Anonymous on October 16, 2014
  73. Physics

    for some reason I keep on getting 1.2 seconds for (b) and .86 m for (a) The back of the book has the same answers for (a) but has 1.5 seconds for (b) i do not see what I'm doing wrong. Can someone confirm that I'm wrong or right??? A blcok is given an

    asked by Jake on December 20, 2009
  74. physics

    1. A 100 lb body is pulled up an inclined plane making an angle of 37 degrees with the horizontal by the rope that passes over the pulley at the top of the plane and is fastened to a 70lb. weight. Neglecting the effect of friction, find the acceleration of

    asked by pao on August 4, 2013
  75. Science

    An aeroplane flying in the air dips with a speed of 360 km per hr in a vertical circle of radius is 200m the weight of the pilot sitting in it 75kg calculate the force with which the pilot presses his seat and plane is at lowest point and plane is at

    asked by Anonymous on August 15, 2016
  76. algebra

    can anyone solve this please it is hard In a basketball game, Garrett and Logan scored a total of 19 points. Logan and Ray scored a total of 14 points. Logan scored as many points as Garrett and Ray together. How many points did each player score?

    asked by zachary stanich on February 16, 2012
  77. Government

    I am a teacher and have a special education student in one of my inclusion government classes. The student likes to draw and drawing seems to encourage him. My question is that I would like to find a government project that would teach government and yet

    asked by Dwayne on September 24, 2010
  78. maths

    DRAW LOCUS OF POINT SO THAT IT IS EQUIDISTANT FROM BC & CA . ... constructed such that none of these triangles overlaps triangle ABC. a) Draw a triangle ABC and then sketch ... 16) AB = 3.2cm BC = 8.4cm The area of the triangle ABC is 10cm². ... CONSTRUCT

    asked by okafor azubuike on April 16, 2016
  79. Physics

    A light string, connects blocks 1 and 2 of masses m1 and m2. These blocks are further connected to a block of mass M by another light string that passes over a pulley of negligible mass and friction. Blocks 1 and 2 move with a constant velocity v down the

    asked by Rahul on December 10, 2010
  80. Physics

    What value of F can pull the 5.00 kg box at constant velocity up the incline plane if uk=0.25. uk is coefficient friction The force F must equal the component of weight down the plane added to the frictional force. The frictional force is uk*mg*cosTheta.

    asked by fluffy on September 12, 2006
  81. physics

    A rescue plane carries a package of emergency supplies to be dropped at a point that is very close to the target. The plane travels with a velocity of 75m/s and flies 135m above the target. How far away (horizontally) from the target must the pilot release

    asked by Anonymous on March 13, 2018
  82. College Physic

    I am stuck on this question. Any help will be greatly appreciated! A 0.082 kg solid cylinder with a radius of 1.90 cm, is placed at the top of a 30º inclined plane of height 29.5 cm. If the inclined plane is not frictionless, and the cylinder does roll,

    asked by Jennifer Hill on November 5, 2012
  83. physics

    crate weighing 6.90 x 10^3 N is pulled up a 46° incline by a force parallel to the plane. If the coefficient of kinetic friction between the crate and the surface of the plane is 0.750, what is the magnitude of the applied force required to move the crate

    asked by nica on September 18, 2014
  84. Physics

    John's approval rating is an average based upon 4 categories. What is his overall weighted rating if the following is true? Category 1= 450 points weight factor 1 Category 2= 475 points weight factor 2 Category 3= 500 points weight factor 1 Category 4= 400

    asked by Sam on January 26, 2009
  85. bio

    A large population of laboratory animals has been bred randomly for a number of generations. There was an interesting revelation. The scientists noted that there was neither an increase nor a decrease in the frequency of animals displaying the recessive

    asked by Bianca on March 10, 2016
  86. Geometry

    Which one of these is NOT a step used when constructing an inscribed square using technology? A. Create a circle using the center with given points tool. B. Connect the points with a line through the center of the circle. C. Mark the points of intersection

    asked by Amy on January 20, 2015
  87. Math

    The vector a1=(1,1,0) and a2=(1,1,1) span plane in R^3. Find the projection matrix P onto the plane, and find nonzero vector b that is projected to zero.

    asked by Melvin on January 2, 2011
  88. Physics

    A block accelerates at 3.2 m/s down a plane inclined at an angle 28.0◦ Find µk between the block and the inclined plane. The acceleration of gravity is 9.8 m/s2.

    asked by Kyla on November 13, 2013
  89. music

    what are singing points? As a music teacher, I've never heard of them. How are they used in the homework? my homework task was to find out 2 different singing points and i can't find it anywhere!! That doesn't make any sense. Are you supposed to be

    asked by daniel on October 4, 2006
  90. Physics - Data Analaysis - Power Laws

    In an experiment, two variables quantities 'x' and 'y' were measure. The relation between x and y is thought to be y=ax^(1/2) x(m)+/- 0.01m y(s) +/- 0.05s 0.10 0.64 0.20 0.90 0.40 1.27 0.80 1.80 1.00 1.90 a) What will you graph in the y- and x- axis in

    asked by Shaila on September 11, 2010
  91. Math Trignometry

    . From the top of the 800-foot-tall Cartalk Tower, Tom sees a plane; the angle of elevation is 67°. At the same instant, Ray, who is on the ground 1 mile from the building, notes that his angle of elevation to the plane is 81° and that his angle of

    asked by Mandy on May 19, 2016
  92. MATH PLZ HELP

    Tanya and Mona are in the Big Beast Booth at the County Fair. Tanya buys a ticket that gives her three throws with a beanbag at the beasts. There are four beasts, each with a different number on them, 1, 2, 3, or 4. Each time she hits a beast Tanya earns

    asked by Emma R. on November 30, 2016
  93. Math

    Flying into the wind, a plane takes 8 h to travel 5432 km from Paris to Montreal. The same plane flying with the wind from Montreal to Paris takes only 7 h. Find the speed of the plane and the speed of the wind. Can you plz answer this sir I really would

    asked by gagan on January 23, 2009
  94. physics

    A small plane mass 600 kg lifts off from the runway at a speed of 145 Km/Kr. 2 Minutes later, the plane has reached an altitude of 300 meters and its airspeed has dropped to 90 Km/Hr. Assume the power output of the engine was constant during this time.

    asked by Mary on March 11, 2012
  95. Physics

    A train travels between stations 1 and 2. The engineer of the train is instructed to start from rest at station 1 and accelerate uniformly between points A and B, then coast with a uniform velocity between points B and C, and finally accelerate uniformly

    asked by Elee on October 6, 2011
  96. Physics

    A train travels between stations 1 and 2. The engineer of the train is instructed to start from rest at station 1 and accelerate uniformly between points A and B, then coast with a uniform velocity between points B and C, and finally accelerate uniformly

    asked by Becca on September 17, 2006
  97. Airplane & Radar

    (Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it directly over a radar tracking station (on ground). If the distance D between the plane and the radar is decreasing at a rate of 300 km/hr,

    asked by math on December 15, 2011
  98. physics

    A 2 kg mass resting on a smooth plane inclined 20 degrees to the horizontal. A cord which is parallel to the plane passes over a massless, frictionless pulley to a 4 kg mass which will drop vertically when released. What will be the speed of the 4 kg mass

    asked by Aim Senallagam on February 19, 2014
  99. physics

    A book whose mass is 2kg is projected up a long 37degree inclined plane with initial velocity, 24m/s. The coefficient of kinetic friction between the plane and the book is 0.25. Use g= 10m/s^2. a) Find friction force. b) How much time does it take before

    asked by Janille on October 21, 2010
  100. Caculas

    (Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it directly over a radar tracking station (on ground). If the distance D between the plane and the radar is decreasing at a rate of 300 km/hr,

    asked by matthew on December 16, 2011