1. science

    a radioisotope, Iodine-131, has a half life of 8.1 days. explain what this means. draw a particle diagram for a sample 12 particles of I-131 initially after 8.1 days and after16.2 days.

    asked by mason on May 24, 2016
  2. science

    Your airplane just ran out of gas. Your plane is falling at a velocity of 80m/sec down. At that velocity, how long will it take your airplane to reach the ground?

    asked by Bokyung on October 4, 2012
  3. maths

    let f(x,y)=sqrt (1-x^2-y^2) where x^2+y^2

    asked by simran on February 22, 2012
  4. Pre-Cal.

    find the inverse of the following function. Find the domain, range,and asymptotes of each function. Graph both functions on the same coordinate plane. f(x)=3+lnx

    asked by phyllys on December 31, 2012
  5. central science

    what is the velocity of a plane that is 475m above the ground, if it drops a dead cat and the cat hits the ground 850m horrizontally from where it is droped

    asked by shaya on October 28, 2011
  6. physics

    A uniform electric field of magnitude 2.80×10 ^4 N/C makes an angle of 37 degrees with a plane surface of area 1.40×10−2 m^2. A)What is the electric flux through this surface? N * m^2/C

    asked by jazz on January 27, 2012
  7. Social studies

    What geographic feature of the Ozarks is not also a feature of the Ouachita mountains a-plane techniques ...b-alluvial Plains C-rolling plains d-plateau

    asked by Anonymous on January 25, 2018
  8. physics

    The plane is flying horizonally at 40m/s at an altitude of 125 m when it drops a bomb. determine how far horizonally from the target you should release the bomb

    asked by Kylie on June 12, 2011
  9. PreCal

    An airplane is traveling at 575 mph in the direction of S 83 degree W. The wind is blowing at N 35 degree W. What is the actual speed and direction of the plane?

    asked by Kate on April 27, 2016
  10. Physics

    A uniform electric field of magnitude 2.70×10^4 N/C makes an angle of 37 degrees with a plane surface of area 1.60×10^−2 m^2 . What is the electric flux through this surface?

    asked by Cooper on January 24, 2012
  11. physics

    A uniform electric field of magnitude 2.80×104 makes an angle of 37 with a plane surface of area 1.60×10−2 .What is the electric flux through this surface?

    asked by David on February 5, 2012
  12. Geometry

    Is it possible for a cross section of a cube to these shapes.... -pentagon -isosceles triangle -scalene triangle ..... If so, please describe how the plane intersects the cube. Thanks!!!!

    asked by Bridgett on January 16, 2013
  13. physics

    a uniform electric field of magnitude 2.5*10^4, makes an angle of 27 with a plane surface area of 0.0133m^2.what is the electric flux through the surface.

    asked by ike on March 6, 2011
  14. physics

    A supply plane traveling 200 KM/hr need to drop supllys to a target 110 meters below. How many seconds before they are over the target do they have to drop the supplies?

    asked by Anonymous on September 21, 2010
  15. Math

    line segment AB is parallel to line segment CD and AB is not equal to CD. Prove that A, B, C, and D must lie in a plane and form a trapezoid. I really don't understand and i need help, thanks.

    asked by Serenity on March 3, 2015
  16. Physics

    2300 Joules is used to lift a wheelbarrow through 4 meters up an inclined plane into a container. Why does the man use more joules (3500 J) to push the wheelbarrow?

    asked by Tia on February 19, 2017
  17. Physics

    2300 Joules is used to lift a wheelbarrow through 4 meters up an inclined plane into a container. Why does the man use more joules (3500 J) to push the wheelbarrow?

    asked by Kale on February 19, 2017
  18. Physics

    An airplane with an airspeed of 66km/h lands on a runway where the wind speed is 28km/h .What is the landing speed of the plane if the wind is head-on?

    asked by Milly Mac on September 18, 2013
  19. Physics

    A dog is sitting in front of a plane mirror. At a command it jumps at the mirror with a speed of 0.50 m/s. How fast does the dog approach its image?

    asked by Bob on May 31, 2012
  20. math/geometry pls help

    A coin of radius 1 cm is tossed onto a plane surface that has been tesselated by right triangles whose sides are 8 cm, 15 cm, and 17 cm long. What is the probability that the coin lands within one of the triangles?

    asked by Eunice on April 21, 2010
  21. Pre-Calc

    Can someone please be kind and show me the steps on this? Thanks Find the equation of the circle centered at the origin in the uv-plane that has twice the circumference of the circle whose equation equals (u-5)^2 + y^2 =9

    asked by Ann on December 8, 2010
  22. Geometry

    A coin of radius 1 cm is tossed onto a plane surface that has been tesselated by right triangles whose sides are 8 cm, 15 cm, and 17 cm long. What is the probability that the coin lands within one of the triangles?

    asked by Eunice on April 21, 2010
  23. Trigonometry

    AN AIRPLANE IS FLYING AT A HEIGHT OF 1000 m. THE ANGLE OF DEPRESSION OF AIRPORT A FROM THE PLANE IS 15°. CALCULATE THE HORIZONTAL DISTANCE BETWEEN THE AIRPLANE AND THE AIRPORT.

    asked by Anonymous on June 16, 2016
  24. math

    Positions of a woman and her dog at any time on the complex plane are z and 2z^2013 + z + 1, respectively. How many turns does the dog make around the origin if the woman goes once along the circle |z| = 1?

    asked by dayyann on May 3, 2013
  25. physics [vectors]

    The concept i get, but somehow i just can't execute this problem, please help me! You are given vectors A = 5.5 6.2 and B = - 3.7 7.4 . A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 19.0.

    asked by lina on August 31, 2009
  26. chemistry

    my younger sister has a homework assignment to find out and draw the hazard symbols found on the following.... vinegar milk of magnesia toothpaste pickled onions orange juice washing powder soap lemonade .....we've looked around the house but nothing seems

    asked by aimee on September 25, 2007
  27. physics

    1.descibe the construction and working of machine used to generate high voltage? 2.draw electric lines between the plates of a parallel plate capacitor with 1(air) and 2(dielectric) as a medium? 3.near the surface of earth the field is about 100V/m. why do

    asked by edward on June 10, 2013
  28. Introductory Physics

    I am really nervous about mathematics, so I just want to make sure I am doing these problems correctly. I figure if I am getting the incorrect answer, I must be doing them incorrectly and need to work on them some more. I THINK I have them correct, but I

    asked by Cecelia on March 30, 2011
  29. chem

    An airplane is pressurized to 650mmHg , which is the atmospheric pressure at a ski resort at 1.30×10^4 altitude.If air is 21 % oxygen, what is the partial pressure of oxygen on the plane?

    asked by andy on July 10, 2010
  30. Physics

    An airplane flies at 200.0 km/h relative to the air. What is the velocity of the plane relative to the ground if it flies during the following wind conditions? a. a 50.0-km/h tailwind b. a 50.0-km/h headwind.

    asked by Melissa on October 3, 2010
  31. Geom./Trig.

    an airplane flies directly overhead at 540mph. 1 minute later is seen at an angle of elevation of 34 degrees. how far did the airplane fly during that time? what is the elevation of the plane?

    asked by Emma on March 28, 2012
  32. geometry

    quadrilateral JKLM is graphed in the coordinate plane.Classify quadrilateral JKLM as specifically as possible.Show your work, and explaine why your answer is correct?

    asked by Anonymous on February 16, 2012
  33. Physics :(

    Bobby​ ​is​ ​pushing​ ​a​ ​20kg​ ​box​ ​up​ ​a​ ​plane​ ​inclined​ ​at​ ​27​ ​degrees​ ​above​ ​the​ ​horizon b.​ ​find​ ​the​ ​force​ ​bobby​ ​needs​ ​to push​

    asked by Anonymous on October 27, 2017
  34. algebra

    The 4200 km trip from New York to San Francisco take 6 h flying against the wind but only 5 h returning. Find the speed of the plane in still air and the speed of the wind.

    asked by Samantha on November 7, 2012
  35. Physics

    A 4.52 kg block slides down a smooth, fric- tionless plane having an inclination of 31◦ . The acceleration of gravity is 9.8 m/s2 . Find the acceleration of the block. Answer in units of m/s2.

    asked by Alejandra on October 16, 2010
  36. physics

    An airplane has a mass of 32272.2 kg and takes off under the influence of a constant net force of 39990.0 N. What is the net force that acts on the plane's 78.5 kg pilot?

    asked by paul on September 20, 2013
  37. physics help!!

    a plane moving horizontally at 120 m/s drops a package from an elevation of 240 m. How far did the package go before it hit the ground? Step by step directions please!

    asked by Hayden on October 20, 2008
  38. Physics

    A cubic block initially at rest slides with a constant acceleration on an inclined plane 10m long in 2s. Calculate the acceleration of the block.

    asked by Diana on February 21, 2017
  39. pre calculus

    Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane. F(x)= ln(8-x) I am totally lost, somebody please help????

    asked by trish on April 25, 2013
  40. Trig

    A plane if flying at 200 mph with a heading of 45 degrees and encounters a wind of 100 mph from the west. What is the resulting velocity and heading?

    asked by Sarah on March 3, 2013
  41. physics

    An airplane has a mass of 33500 kg and takes off under the influence of a constant net force of 41500 N. What is the net force that acts on the plane's 82 kg pilot?

    asked by gabe on October 3, 2010
  42. Algebra and Trigonometry

    A plane if flying at 200 mph with a heading of 45 degrees and encounters a wind of 100 mph from the west. What is the resulting velocity and heading?

    asked by Sarah on March 3, 2013
  43. Calc II

    Find the volume of the solid generated by rotating the region of the x-y plane between the line y=6, the curve y=3sin(x)+3 for -pi/2 < (or equal to) x < (or equal to) 5pi/2 about the line y = 6.

    asked by Anon on February 2, 2016
  44. 8th Algebra

    1) An airplane took 2 hours to fly 600 km against a head wind. The return trip with the wind took 1 2/3 hours. Find the speed of the plane in still air.

    asked by Joy on March 8, 2009
  45. solid mechanics

    A body is subjected to two normal strains of magnitude Ex=0.001 & Ey=0.002. Determine the normal and shearing strains on a plane inclined to 30° with the Ex strain

    asked by raju on August 31, 2016
  46. algebra 1

    In the standard (x,y)cooridniate plane the graph of (x-2)second power +(y+4 second power =9 is a circle. What is the area enclosed by this circle, expressed in sguare coordinate units? please help me?

    asked by elodie on April 24, 2011
  47. PHYSICS

    A box of mass m=20kg is to be pushed up the inclined plane by a horizontal force F at constant speed. of μk= 0.2, find the work done on the box by the force F?

    asked by Francis Valois on February 16, 2016
  48. physics

    A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 9 m, y =6 m, and has velocity vo =(4.5 m/s)i + (−4 m/s)j. The acceleration is given by a = (6 m/s2)i + (1 m/s2)j. What is the magnitude of the displacement

    asked by kat on September 17, 2012
  49. calculus

    a box with mass 34.1 is held stationary on a rmap inclined at an angle of x degree by a force of 100 N at an angle of 30 degree to the plane. Find x.

    asked by Jessie on March 1, 2012
  50. geometry

    On the coordinate plane, ΔABC ≅ ΔDEF by SSS. ΔABC translates 2 units to the left and 3 units down. Do the triangles remain congruent? Explain why or why not. please help me

    asked by help please on December 13, 2017
  51. Math

    Thevolume of a right circular cone is 5 litres.calculate the volumes of the two parts into which the cone is divided by a plane parallel to the base,one-third of the way down from the vertex to the base.

    asked by Max on May 14, 2017
  52. geometry

    On the coordinate plane, ΔABC ≅ ΔDEF by SSS. ΔABC translates 2 units to the left and 3 units down. Do the triangles remain congruent? Explain why or why not.

    asked by help please on December 13, 2017
  53. Physics

    A solid cylinder rolls down an incline plane without slipping. If the center of mass of the cylinder has a linear acceleration of 2.67 m/s2, what is the angle of the incline to the horizontal?

    asked by Mary on July 21, 2015
  54. physics

    An airplane has a mass of 34,500 kg and takes off under the influence of a constant net force of 45,000 N. What is the net force that acts on the plane's 80 kg pilot?

    asked by Anonymous on January 25, 2012
  55. math

    If an airplane travels at 300 mph with no air resistance, and it travels directly south with a wind of 50 mph east, how fast is the plane going?

    asked by tarra on March 24, 2014
  56. algebra

    the line "l" passes through the point P=(1,-1,1) and has a direction vector d=[2,3,-1], for the following plane Pl, determine whether l and P is parallel, perpendicular, or neither. a) 2x + 3y - z = 1 could you tell me also how it would differ if it was

    asked by Reen on January 12, 2011
  57. Physical science

    i push a 500n box up an inclined plane that is 4 m long and 1.2 m high. what force is applied to push the box up the ramp?

    asked by Kelly on March 5, 2015
  58. electromagnetic

    Plane x = 10 carries current 100 mA/m along az while line x = 1, y = —2 carries filamentary current 20π mA along az Determine H at (4, 3, 2). pls i need it for my exam

    asked by ASB on October 31, 2014
  59. Dynamics, Math

    a plane is flying horizontally at an altitude of 420m. A bomb was released, how far horizontally point bomb hit the ground?

    asked by Jenny on March 19, 2013
  60. Dynamics, Math

    a plane is flying horizontally at an altitude of 420m. A bomb was released, how far horizontally point bomb hit the ground?

    asked by Jenny on March 19, 2013
  61. physics

    A uniform electric field of magnitude 2.10×10^4 makes an angle of 37 with a plane surface of area 1.60×10^−2 .What is the electric flux through the surface?

    asked by giga on January 27, 2012
  62. math

    In standard (x,y )coordinate plane,the graph of (x-2)^2 + (y+4)^2=9 is a circle.What is the area enclosed by this circle,expressed in square coordinate units?

    asked by ashley on April 18, 2011
  63. math

    to graph C(3,2) on a coordinate plane Translate the point left 3 units and down 1 unit.Graph the image point C. A. x,2,y3=x,1,y,1 B. x,2,y2=x,1,y,1 C. x,2,y3=x,1,y,1 D. x,3,y2=x,1,y,1 Is the answer D? Thank you

    asked by monday on October 28, 2014
  64. physics

    A plane which weighs 1122 kg goes from a speed of 145.5 m/sec and height of 1133 m to a speed of 82 m/sec and 592 m. What is work?

    asked by john on September 22, 2010
  65. Calculus

    Consider the differential equation dy/dx=xy-y. Find d^2y/dx^2 in terms of x and y. Describe the region in the xy plane in which all solutions curves to the differential equation are concave down.

    asked by Michelle on May 2, 2014
  66. math

    Stacey drew a triangle on a coordinate plane. She wrote down the ordered pair for each vertex. How many ordered pairs did she wrote down?

    asked by Anan on April 3, 2012
  67. calculus

    Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane. f(x)=3+e^4−x

    asked by Miriam on September 27, 2013
  68. geometry

    A cross-section of a sphere (when cut by a plane through its center) is a circle of area 100pi cm^2 what is the surface area of the sphere ?

    asked by D. on April 24, 2014
  69. physics

    what is the effect on the speed of a fighter plane chasing another when it opens fire?what happens to the speed of pursuid plan when it returns the fire?

    asked by aman on June 18, 2008
  70. Physics

    What must be the minimum height of a plane mirror so that a boy of height 162 cm can view himself from head to toe? A. 40.5 cm B. 81 cm C. 162 cm D. 324 cm It would be B. 81 cm?

    asked by sophie on April 5, 2009
  71. trig

    A pilot is flying at 10,000 feet and wants to take the plane up to 20,000 feet over the next 50 miles. What should be his angle of elevation to the nearest tenth?

    asked by Reg on January 8, 2014
  72. Physics

    At t=0, a particle leaves the origin with a velocity 6m/s in the positive x direction and moves in the x-y plane with a constant acceleration (-2i-4j)m/s2 How far the particle from the origin at t=1 ?

    asked by Maryam on October 31, 2013
  73. trigonometry

    A plane flew 50 km on a bearing 63° 20', and then flew on a bearing of 153°20' for 120 km. Find the distance between the starting and ending point.

    asked by ymme on March 5, 2016
  74. math

    A small plane is flying a banner is 144 square feet. The width of the banner is 1/4 the length of the banner. What are the dimensions of the banner?

    asked by todd on February 3, 2015
  75. Trigonometry

    A plane is 160 miles north and 85 miles east of an airport. If the pilot wants to fly directly to the airport, what bearing would be taken?

    asked by AwesomeGuy on February 5, 2013
  76. physics please help!!

    You're standing several meters away from a regular (plane) mirror. The mirror has water spots on its surface. Can you see both the spots and yourself in focus at the same time?

    asked by archi on November 22, 2011
  77. maths

    How are the angles to be constructed in distinct half plane of a line segment for division of line segment? (A) obtuse (B) acute (c)right (d) A OR B

    asked by sanjay on February 26, 2017
  78. Physics

    You are given vectors A = 5.0i - 6.5j & B = -3.5i + 7.0j. A third vector C lies on the xy-plane. Vector C is perpendicular to vector A, & the scalar product of C with B is 15.0. From this information, find the components of vector C.

    asked by Cathy on June 23, 2013
  79. physics

    A projectile is lanched om horizontal plane. Variation of slop of trajectory of projectile with time. Where m=0 to1 and t=0 to 10. What will be the horizontal range?

    asked by Shivam on July 24, 2011
  80. Science

    Please help me with these questions from the Science 6: Forces and Motions Unit Test. My answer-****** 1. Which of the following best describes the movement of an object at rest if no outside forces act on it? (1 point) It will move due to inertia. Gravity

    asked by Ed on May 21, 2018
  81. MATH

    How do i find the center of a circle using 3 points. Also need to find the radius and the equation of the circle.... My 3 points are (2,8) (-4,6) (1,-1) I found the Equation of the perpendicular bisector of the line between the first and second point which

    asked by B on September 25, 2014
  82. HELP i dont get it

    The producer of X is contemplating a price change and has asked for your advice. After some empirical investigation, you conclude that the price elasticity of demand for X is 0.75. Your advice to the producer is to Increase price to raise total revenue.

    asked by john on November 1, 2010
  83. game theory economics

    Mitchell Electronics produces a home video game that has become very popular with children. Mitchell’s managers have reason to believe that Wright Televideo Company is considering entering the market with a competing product. Mitchell must decide whether

    asked by aaniya gill on October 2, 2011
  84. college geometry

    Given: right triangle ABC with right angle at C, AC=22 and BC=6.Draw altitude CD where D is o hypotenuse AB. What is the ratio of the area of triangle ADC to the area of triangle CDB?

    asked by Kathy on December 13, 2010
  85. geometry

    Maurice drew an angle larger than a right triangle. Then he made it into a triangle by drawing a third side. What kind of Triangle did maurice draw?

    asked by Anonymous on September 29, 2014
  86. statistics

    You draw two card from a standard deck of 52 cards and replace the first one before drawing the second. Find the probablity of drawing a 4 for the frist card and a 9 for the second card

    asked by Clay on June 26, 2010
  87. physics

    A 5 kg box is sitting on a table. Bob's hand is pushing down on the box with a 12 N force. Find the normal force on the box. (draw this)

    asked by Beverly on October 15, 2015
  88. math

    the volume of a prism is 48 cubic centimeters. the area of the base of the prism is 8 square centimeters. what is the height of the prism? draw a picture

    asked by claude on January 27, 2012
  89. statistics

    On a standard 52 card deck, calculate the probability. that on card is either a queen or a heart draw one card, what is the probability that it is a king, given that it is a club? Thanks

    asked by sonney32 on April 16, 2011
  90. Calculus (increasing/decreasing)

    Find the interval(s) where the function is increasing and the interval(s) where it is decreasing. (Enter your answers using interval notation. If the answer cannot be expressed as an interval, enter EMPTY or ∅.) f(x) = (5 − x^2) / x my work: a)

    asked by Anna on February 20, 2018
  91. physics question

    A rocket-powered hockey puck is moving on a (friction-less) horizontal air-hockey table. The x- and y-components of its velocity as a function of time are presented in the graphs below. Assuming that at t=0 the puck is at (X0,Y0)=(1,2), draw a detailed

    asked by himel on August 17, 2016
  92. physics .Henry,Damon,Steve,Saed,bobpursley, And This is my question every one

    A rocket-powered hockey puck is moving on a (friction-less) horizontal air-hockey table. The x- and y-components of its velocity as a function of time are presented in the graphs below. Assuming that at t=0 the puck is at (X0,Y0)=(1,2), draw a detailed

    asked by himel on August 21, 2016
  93. Physics

    A cyclist travels a distance of 1200m due north before going 2000m due east followed by 500m south-west. Draw a scale diagram to calculate the cyclist's final displacement form her initial position?

    asked by Jorge on August 17, 2015
  94. world history

    what best describes the beliefs of progessive liberals? http://www.google.com/search?q=progressive+liberals&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA Lots of information to draw from. =)

    asked by jessica on April 17, 2007
  95. i need ur help in compiler construction

    Q: Given the following 3-address code 1: a = 1 2: b = 2 3: c = a + b 4: d = c - a 5: if( d < 20 ) goto 11 6: d = b * d 7: if( d > 20 ) goto 11 8: d = a + b 9: e = e + 1 10: goto 6 11: b = a + b 12: e = c - a 13: if( e < d ) goto 3 14: a = b * d 15: b = a

    asked by MarY Queen on January 21, 2007
  96. chemistry

    i do not understand how to do these and i have a question on my test tomorrow on this stuff can someone explain to me how to do this? for each of the following molecules draw the lewis structure, determine the shape, determine the polarity, and determine

    asked by brittney on May 18, 2011
  97. English

    Slot Boundaries. I am new to this and Im not sure what I am supppose to do. I have to seprate the word document sentences and draw verticle lines to identify the slot boundries. Then I am required to label each slot with the form and function. After

    asked by Amy on December 28, 2011
  98. economic

    The table below is a set of hypothetical production possibilities for a nation. Combination Automobiles(thousands) Beef (thousands of tons) A 0 10 B 2 9 C 4 7 D 6 4 E 8 0 a.)Plot the production possibility data. What is the opportunity cost of the first

    asked by thiti on February 9, 2014
  99. economic

    6. The table below is a set of hypothetical production possibilities for a nation. Combination Automobiles(thousands) Beef (thousands of tons) A 0 10 B 2 9 C 4 7 D 6 4 E 8 0 a) Plot the production possibility data. What is the opportunity cost of the first

    asked by trongboy16 on February 11, 2014
  100. economic

    6. The table below is a set of hypothetical production possibilities for a nation. Combination Automobiles(thousands) Beef (thousands of tons) A 0 10 B 2 9 C 4 7 D 6 4 E 8 0 a) Plot the production possibility data. What is the opportunity cost of the first

    asked by thiti on February 9, 2014