1. CHEMISTRY

    1.What is the relationship between polarity of a molecule and boiling point? 2.How does a hydrogen bond's strength compare to normal chemical bonds. such as covalent and ionic bonds? 3.Why don't fish freeze to death when the water above them freezes in a

    asked by Amy on January 15, 2015
  2. basic chem HELP

    Hello I have a couple questions first is How man grams of Fe(OH)3 can be produced by the addition of .25 moles of Fecl3 to 1.2L of a .85M NaOH solution . I know we use the molarity equation MOlarity= moles of solute/ mass of solvent but i keep gettin gthe

    asked by Elizabeth on December 10, 2017
  3. biology/chemistry

    Please help i am on a dead line and am stuck on this question, Gametes produced in the process of meiosis in humans (chromosome 4)has a long and short arm the short arm has the gene for Huntington's (H) attached and the long arm the gene for Red hair (R) i

    asked by charlie on April 10, 2007
  4. Geometry

    Eratosthenes knew that in Aswan the sun was directly overhead at noon on the summer solstice. At the same time, he measured the angle of the sun to a vertical line in Alexandria. He found this angle to be one(1/50) fiftieth of a circle a. What was

    asked by James on August 29, 2018
  5. Physics

    An old car is traveling down a long, straight, dry road at 25.0 m/s when the driver slams on the brakes, locking the wheels. The car comes to a complete stop after sliding 305 m in a straight line. If the car has a mass of 755 kg, what is the coefficient

    asked by Amanda on March 8, 2011
  6. science

    1.Darwin assumed that evolutionary change was always slow and gradual. What was the first evidence that suggested evolution change might happen fast sometimes? A. Homologous structures B. Fossils*** C. Reproduction rates D. DNA sequences 2.Which of the

    asked by Alyssa on October 9, 2014
  7. Global

    Which statement explains the decline in unemployment rates in Britain between 1914 and 1918? a) The British were buying huge amounts of war materials from the United States b) Assembly-line production of consumer goods required more workers c) World War I

    asked by Anonymous on March 31, 2009
  8. Algebra 1

    little help? 1)The function g(t) = 2t represents the number of guitar lessons, g(t), you can complete in t months. How many guitar lessons can you complete in 7 months? 2)A taco stand sells tacos for $3.25 each. The stand’s expenses for the day are $210.

    asked by Hally on January 2, 2013
  9. english CITING

    hey i tried to do the following hope there correct this time my work is the last the upper from my work is the original one that i need to correct Source C: An article in the Chicago Tribune entitled “Happiness is Contagious, New Study Finds.” It was

    asked by Anonymous on September 29, 2011
  10. writing skills

    4.   Read the following paragraph. Then answer the question that follows it. Next, with your right hand, make the wide part of the right end into a loop, holding the two narrow parts between your thumb and your index finger. Take the left end with your

    asked by Perry on April 1, 2015
  11. electromagnetism

    Consider a coaxial cable with a central conducting wire (r=1mm) surrounded by an outer coaxial conducting sheath (rinner=3mm,router=3.2mm) as shown. A current i=300mA flows down the center wire (into the page) and back through the conducting sheath (out of

    asked by JuanPro on April 14, 2015
  12. Social studies

    What is the leading theory about how early humans arrived on the American continents? (1 point) They walked from Africa to South America when those two continents were part of the same landmass. They walked from Asia to North America over a strip of land

    asked by Anna perry on August 30, 2016
  13. physics

    A microphone is located on the line connecting two speakers that are 0.546 m apart and oscillating 180degrees out of phase. The microphone is 2.00 m from the midpoint of the two speakers. What is the lowest frequency that produces an interference maximum

    asked by Sandhya on December 3, 2008
  14. Editorial Evaluation (Writeacher)

    What do you think now? I tried to follow your advice as well as the instructions in the website link you provided for me. Correction: "As a student, why have you enrolled in the University of Georgia? What do you wish or intend to gain? You might answer by

    asked by Anonymous on February 16, 2014
  15. Editorial Evaluation (Writeacher)

    What do you think now? I tried to follow your advice as well as the instructions in the website link you provided for me. Correction: "As a student, why have you enrolled in the University of Georgia? What do you wish or intend to gain? You might answer by

    asked by Anonymous on February 16, 2014
  16. Geometry

    31.Identify the Hypothesis of the statement below. If you are riding on a train, then it will stop at every station on the line. A.You are riding on a train B.It will stop at every station on the line C.You are not riding on a train D.It will not stop at

    asked by Sarah on June 2, 2016
  17. ea

    Q: penn foster examination number 02603600 1. Which learning technique is frequently used in the expository model of teaching? A. Deductive thinking C. Discovery learning B. Inductive thinking D. Knowledge-based learning my Answer..A 2. Which technique is

    asked by Lynda on May 14, 2010
  18. physics

    A monochromatic light beam with energy 204eV is used to excite the Be+3 (H –like atom with Z=4) from its ground state to some excited state m. Neglect the finite nuclear mass correction. a) Find the quantum number m of this excited state. b) Following

    asked by qwer on April 25, 2011
  19. Help Please - Science

    I'm stuck on this thing in science. It's a lab report so its kinda hard to explain. We did a topographic map experiment. We had a big rock, and put it in a plastic bin. We then marked centimeters on the bin and filled water to the first centimeter. We drew

    asked by Alex on November 13, 2007
  20. Science

    If A tank with a flat bottom is filled with water to a height of four meters. what is the pressure at any point at the bottom of the tank? my teacher wants me to ignore atmospheric pressure when calculating my answer A. 3.5 kPa B. 3,500 kPa C. 34.3 kPa D.

    asked by Caitlin on May 7, 2013
  21. Alg 2

    Today we learned how to solve systems of equations with 3 variables, however my teacher didn't go over how to do a problem where not every single equation in the system has the 3 variables. Can someone point me to a place that explains this? the kind of

    asked by john on October 5, 2012
  22. Math

    Hello everyone. I have one hard math problem and I do not know how to solve it. would you help me to solve this problem? Thank you An 11[times]11[times]11 wooden cube is formed by gluing together 11[cubed] unit cubes. what is the gratest number of unit

    asked by Lyon on May 26, 2010
  23. algebra

    Hockey teams receive 2 points when they win and 1 point when they tie. One season, a team won a championship with 64 points. They won 11 more games than they tied. How many wins and how many ties did the team have? Wins?___ Ties ____

    asked by akaray on December 17, 2009
  24. Math

    Maria is going for a walk. She begins by walking north for 1 km. She then turns and walks east for 22 km, then turns and walk south for 3 km. She walks at a constant 4 km/hr. Express the distance from Maria to her starting point as a multipart function of

    asked by Anonymous on December 8, 2009
  25. physics

    A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?

    asked by pam on March 24, 2011
  26. Math

    (With a TI-89 calculator) Graph x(t) = 3t^2 and y(t)=2-2t on [0,1]. Write a Cartesian equation that models this graph. Identify the initial and terminal points. I graphed both equations, but I didn't really get what [0,1] meant. I think it's an interval.

    asked by Nikki on August 9, 2009
  27. physical

    Water flow along horizanta pipe at cross sectional area 48cm which has a constriction at cross sectional area 12cm at one place if the speed at the water at the constriction point is 4m/s calculate the speep at the wide section

    asked by Anonymous on September 22, 2013
  28. physics

    A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?

    asked by zach on March 20, 2011
  29. Physics

    The electric field on the axis of a uniformly charged ring has magnitude 370kN/C at a point 6.2cm from the ring center. The magnitude 17cm from the center is 150kN/C ; in both cases the field points away from the ring.Find the ring's radius.

    asked by Anonymous on March 10, 2014
  30. 9th math algebra

    The stars indicate the answers i think are correct. 1. What number is a solution of the inequality? m > 13/3 a.3 b.5 * c.2 d.-9 2. Write the inequality in words. 3n < 52 (1 point) a.fifty-two less than three times n *b.Three times n is less than fifty-two.

    asked by Amy on December 13, 2009
  31. Physics

    Charge +Q = +7.10 nC is uniformly distributed along the right half of a thin rod bent into a semicirle of radius R = 3.60 cm, while charge −Q = −7.10 nC is uniformly distributed along the left half of the rod. What is the magnitude and direction of the

    asked by Gordon on January 24, 2017
  32. Math

    If ln a=2, ln b=3, and ln c=5, evaluate the following: (a) ln(a^−2/b^4c^−3)= -.9524 (b) ln(√b^−4*c^1*a^−1)= -1.739 (c) ln(a^2b^4)/ln(bc)^−2= 42.39 (d) (ln(c^−1))*(ln(a/b^3))^−4= -.03507 I am getting these answers but the problem gives me an

    asked by Banana on August 22, 2018
  33. algebra

    I am having problems with both of these questions. 1. Hockey teams receive 2 points when they win and 1 point when they tie. One season, a team won a championship with 67 points. They won 11 more games than they tied. How many wins and ties did the team

    asked by C on May 26, 2008
  34. physics

    Your instructor rides on a merry-go-round turning at a constant rate. In which direction does the net force on your instructor point? A. away from the center B. toward the center C. down D. tangent to the circular path I choose D.tangent to the circular

    asked by anonymous on March 11, 2014
  35. maths

    a drunkard walking ina narrow lane takes 5 steps forward and 3 steps backward followed again 5 steps forward and 3 steps backward and so on. if each step is 1m and requires 1 second. determine how long would the drunkard take to fall in to pit 13 m away

    asked by shehzad on April 20, 2015
  36. physics

    A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?

    asked by peter on March 23, 2011
  37. Algebra 3

    Suppose you are tossing an apple up to your friend on a third-story balcony. After x seconds the height of the apple is given by h= -16t^2+38.4t+0.96. Your friend catches the apple just as it reaches its highest point. How long does it take for the apple

    asked by Francella on December 15, 2014
  38. maths

    A tree stands vertically on a hill side which makes an angle of 15 degree with the horizontal. From a point on the ground 35 meter down the hill from the base of the tree, the angle of elevation of the top of the tree is 60 degree. find the height of the

    asked by Geeta negi on September 16, 2012
  39. physics

    a machine weighing 1500N is supported bt two chains attached to some point on the machine.one of these ropes goes to the eye bolt in the well & is inclined 30 degrees to the horizontal & the other goes to the hook in ceiling & is inclined at 45 degrees to

    asked by wilson on March 23, 2013
  40. physics

    Expensive amplifier A is rated at 250 W, while the more modest amplifier B is rated at 45 W. (a) Estimate the sound level in decibels you would expect at a point 3.5 m from a loudspeaker connected in turn to each amp. (b) Will the expensive amp sound twice

    asked by emy on November 7, 2013
  41. IDIOM

    GRABBING THE BULL BY THE HORNS A WOLF IN SHEEP'S CLOTHING Thank you for using the Jiskha Homework Help Forum. This expression means to "get right to the point." If you have something to say you do not "beat around the bush" but come right out and say it.

    asked by ray on February 21, 2007
  42. AP Calculus

    Can someone help me solve these two questions? Thanks 1) Use the mid-point rule with n = 4 to approximate the area of the region bounded by y = -x^3 and y = -x. 2) A rock is thrown upward with a speed of 48 feet per second from the edge of a cliff 400 feet

    asked by Ryan on July 15, 2018
  43. Algebra

    In the old days there were elevator operators to transport passengers. Don Downs always started his day in the basement. He went up 20 floors to take his boss some coffee. Then he went down 8 floors to take a donut to his friend. He went up 7 floors to

    asked by samay on January 26, 2018
  44. Chemistry

    Chlorofluocarbon was once used in air conditiones as the heat transfer liquid its normal boiling point is -30 degrees C and its enthalpy of vaporization is 16J/g. The gas and the liquid have specific heat capacities of 0.61 J/g8C and 0.97 J/g*C,

    asked by 19 on November 21, 2011
  45. Language Arts

    Which of the following is the best reason to use visuals in a research presentation? A. To illustrate your main point in an engaging manner. B. To illustrate any topic with data in percentages. C. To show different ways of looking at the same information.

    asked by Sonali on April 10, 2015
  46. Physics/Chem

    an experiment, a 0.280-kg piece of ceramic superconducting material at 23 °C is placed in liquid nitrogen at its boiling point (−195.8 °C) to cool. The nitrogen is in a perfectly insulated flask that allows the gaseous N2 to escape immediately. How

    asked by Jeff Kinka on July 1, 2016
  47. Chem

    Aspirin (acetylsalicylic acid, ) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved 2.00 g of aspirin in 0.600 L of water and measured the pH . What was the Ka value calculated by the student if the of the pH of the

    asked by Katie on March 28, 2010
  48. Science Help

    Which of the following is not a goal of the clean water act? A. Controlling water pollution from point sources B. Encouraging voluntary cooperation by citizens related to nonpoint sources of pollution. C. Educating citizens about the importance of reducing

    asked by callie on November 21, 2014
  49. chemistry

    the freezing point of benzene C6H6 is 5.5000C at 1 atmosphere. In a laboratory experiment, students synthesized a new compound and found that when 10.70 grams of the compound were dissolved in 294.0 grams of benzene, the solution began to freeze at

    asked by mickey on August 26, 2014
  50. physics

    a water hose is used by a gardener a to fill a 30-liter bucket {one liter =1 000cm^3}. nozzele with an opening of cross sectional area0.500cm^2 is then attached to the hose.the nozzlemis held so that water is projected horizontally from a point 1.00m above

    asked by afika on June 1, 2016
  51. Physics

    A small block slides along the inside of a hemispherical bowl of radius r = 41.4 cm. When the block is at an angle of θ = 62.3° above the lowest point, it is sliding down with a speed of v = 3.02 m/s and speeding up at a rate of 3.54 m/s2. Find the

    asked by Roman on July 6, 2015
  52. Physics

    A ball is projected horizontally from the edge of a table that is 0.465 m high, and it strikes the floor at a point 1.04 m from the base of the table. gravity is 9.8 m/s the initial speed of the ball is 3.376042 m/s ~How high is the ball above the floor

    asked by Anonymous on November 3, 2015
  53. Physics

    A uniform rod pivoted at one end (point O) is free to swing in a vertical plane in a grav- itational field, held in equilibrium by a force F at its other end. The rod of length 7 m and weight 4.7 N makes an angle 39◦ with the hor- izontal and the force

    asked by Youthers on December 7, 2014
  54. Calculus

    Can someone help me solve these two questions? Thanks 1) Use the mid-point rule with n = 4 to approximate the area of the region bounded by y = -x^3 and y = -x. 2) A rock is thrown upward with a speed of 48 feet per second from the edge of a cliff 400 feet

    asked by Ryan on July 15, 2018
  55. math

    A rocket is fired into the air with an initial velocity of 98 m/s. The height ( h ) of the rocket after t seconds is given by the expression h = 98t - 4.9t2. a. What the average rate of change over the first 2 seconds. b. At what point does the rocket

    asked by sdtvds on October 30, 2018
  56. THEORY OF MECHINE

    a brake shoe applied to a drum by a lever ab which is pivoted at a fixed point a and rigidly fixed to the shoe. The radius of the drum is 160mm. The coefficient of friction at the brake lining is 0.3. If the drum rotates clockwise, find the braking torque

    asked by RANDHIR KAUSHIK on January 9, 2013
  57. Physics 4

    A 10.0-kg block is released from point A in Figure P8.57. The track is frictionless except for the portion between points B and C , which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2 250 N/m, and compresses

    asked by Anonymous on October 20, 2011
  58. chemistry

    Trimellitic acid containing carbon, hydrogen, and oxygen has 51.44% C, 2.88% H, and 45.68% O. It can be obtained by oxidation of coal with nitric acid. A 2.416-g sample of this compound was dissolved in 40.00 g of acetone, producing a solution that boils

    asked by David on April 14, 2010
  59. Physics

    A pair of constant forces of magnitude F = 11.1 N is applied to opposite sides of the axle of a top, as shown in the figure. The diameter of the axle is d = 8.67 mm. The angle è, which has a value of 36.1°, describes the steepness of the top's sloping

    asked by Physics on December 10, 2013
  60. eco

    The inflation rate is dropping to the point that many economists are worried that deflation is occurring. Which of the 4 options would an economist most likely recommend to Congress as a solution to deflation? A. decrease spending on grants for small

    asked by Anonymous on April 2, 2018
  61. Physics

    A 10.0-kg block is released from point A in Figure P8.57. The track is frictionless except for the portion between points B and C , which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2 250 N/m, and compresses

    asked by Cameron on January 27, 2015
  62. science

    A driver takes off with a speed of 10m/s from a 5m high diing board at 30° above the horizontal how much later doesh she strike the water A rescue plaNe carries a package of emergency supply to be dropped at a point that is very close to a target the

    asked by Shaun on February 26, 2018
  63. physics

    A 10.0 kg block is released from point A in the figure below. The track is frictionless except for the portion between points B and C, which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2300 N/m, and compresses

    asked by carlton on November 14, 2011
  64. math

    The total price of a mobile and a watch is rs8000. If 10% discount and 10% VAT IS imposed on both, their selling price becomes rs7920, find the marked price of mobile and watch separately. Well I did this question and every time I get to a point where the

    asked by A GOODSTUDENT on August 31, 2016
  65. Chemistry

    10. Avogadro's number can be used to find the number of atoms in an element.- T 12. A photon is a quantum of light energy.- T 17. The atomic mass unit is determined by Oxygen-16.- F 18. The number of particles in a mole is a constant.- T 19. The number of

    asked by mysterychicken on October 21, 2010
  66. Physics

    Your teacher placed a 4.5 kg block at the position marked with a “ +” (horizontally, 0.5 m from the origin) on a large incline outlined on the graph below and let it slide, starting from rest. Find the horizontal distance from the bottom (right-hand)

    asked by Amanda on November 15, 2014
  67. Physics(Please respond)

    A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 17.4 m/s at an angle of 35.0¢ª above the horizontal. It rises to its maximum height and then falls down to the green.

    asked by Hannah on May 28, 2012
  68. physics

    A 10.0 kg block is released from point A in the figure below. The track is frictionless except for the portion between points B and C, which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2350 N/m, and compresses

    asked by Emily Tran on November 18, 2012
  69. physics

    A 10.0 kg block is released from point A in the figure below. The track is frictionless except for the portion between points B and C, which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2350 N/m, and compresses

    asked by mightymouse on March 1, 2009
  70. Physics(Please respond)

    A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 17.4 m/s at an angle of 35.0¢ª above the horizontal. It rises to its maximum height and then falls down to the green.

    asked by Hannah on May 28, 2012
  71. science

    The position-time graph for a tennis ball thrown vertically upwards from the second floor of a school building is shown below.ignore all effects of air friction.The height of the second floor is 6,5m.The ball rises 0,9 m from the point of projection before

    asked by ntando on February 22, 2015
  72. Physics

    A race car starts from rest on a circular track of radius 500 m. The car's speed increases at the constant rate of 0.520 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find the following. a)speed of the

    asked by Karrine on October 18, 2012
  73. Physics

    Units count. Show all steps, not just the numerical substitutions. Show the equations you used. No information is missing. A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.)

    asked by Phil on September 26, 2011
  74. Physics

    Units count. Show all steps, not just the numerical substitutions. Show the equations you used. No information is missing. A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.)

    asked by Jane on September 26, 2011
  75. phsyics

    A mass, m1 = 9.36 kg, is in equilibrium while connected to a light spring of constant k = 112 N/m that is fastened to a wall. A second mass, m2 = 6.71 kg, is slowly pushed up against mass m1, compressing the spring by the amount A = 0.201 m The system is

    asked by Anonymous on November 5, 2009
  76. VERY URGENT!!!

    Large numbers of people have moved from rural areas to urban areas in Asia, Africa, and Latin America because (1 point) they want to live life at a slower pace. there are often few jobs and a shortage of land to farm in the countryside. conditions in large

    asked by Gabby on December 18, 2012
  77. physics

    If the earth acceleration due to gravity on a mass of 2000kg on the earth surface is 10ms.What will be the acceleration due to gravity when it is at a point twice the radius of the earth.What is the gravitational force on it.

    asked by Boniface on August 12, 2011
  78. physics

    four point charges on corners of a square.. top left -1, top right +2, bottom left -2, bottom right -1 ... object in middle is -1 ... which direction will that object move? up, down, left, or right (no angles)

    asked by christy on March 23, 2017
  79. Physics

    I'm trying to find the relationship between electric field strength and distance from point charge as an equation. I found the equation cd = E/(c*c). c is the factor by which the distance changes and E is the field strength. Is the equation good enough?

    asked by Anonymous on May 8, 2017
  80. Physics

    For a given velocity of projection from a point on a inclined plane , the maximum range down the plane is three times the maximum range up the incline. Then find the angle of inclination of the inclined plane.

    asked by ADITYA BABAR on July 30, 2016
  81. Physics

    Two forces 10 N acting in the direction N 30 east and 15 N acting in the eastern direction, if both forces act at a point, find the magnitude and direction of (a) the resultant force (b) the equilibriant force.

    asked by Godson on April 9, 2015
  82. physics

    Two speakers are wired to emit identical sounds in unison. The wavelength in air of the sounds is 6 m. Do the sounds interfere constructively or destructively at a point 10 m from both speakers? 1. Destructively 2. Neither 3. Constructively

    asked by Emily on April 21, 2013
  83. Physics

    The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kg-1. Assuming a uniform field, what is the value of the gravitational field strength in the region between the planet’s surface and

    asked by Christine on January 19, 2011
  84. physics. urgent answer please

    Two forces 10 N acting in the direction N 30 east and 15 N acting in the eastern direction, if both forces act at a point, find the magnitude and direction of (a) the resultant force (b) the equilibriant force.

    asked by Godson on April 10, 2015
  85. math

    A man drove his car northward,then turned left and drove 10 km and again turned left and drove 20 km.He found himself 10 km west of his starting point.How far did he drive northward initially.

    asked by alok on December 14, 2015
  86. Math

    If an observer stands at a certain point in the same horizontal plane as the base of a radio tower. the angle of elevation of the top of the tower is 13deg 15'. If the observer moves 156.25 feet towards the tower, the angle of elevation is 18deg 10'. Find

    asked by McKenna Louise on February 17, 2014
  87. Calculus

    Consider the function f(x)=xlnx. For the following questions, write inf for ∞, -inf for −∞, and None if no such answer exists. a.) The domain of this function is . b.) The x-intercept is . c.) f′(x) = . d.) f(x) is increasing on the interval and

    asked by Nicola on November 27, 2011
  88. physics

    a body of mass 5kg is thrown vertically upwards with a speed of 10m/s. what is its kinetic energy when its thrown? find its potential energy when it reaches at the highest point. also find the maximum height attained by the body[g=10m/s]

    asked by akansha on February 27, 2012
  89. physics

    A spring cannon is located at the edge of a table that is 1.70 m above the floor. A steel ball is launched from the cannon with speed v0 at 25.0° above the horizontal. (a) Find the horizontal displacement component of the ball to the point where it lands

    asked by Anonymous on February 16, 2011
  90. algebra

    each week, mandy's algebra teacher gives a 10 point math quiz. after 5 weeks, mandy has earned a total of 36 points for an average of 7.2 points per quiz. she would like to raise her average to 9 points. on how many quizzes must she score 10 points in

    asked by lily on May 17, 2010
  91. Algebra 2

    An archer releases an arrow from a shoulder height of 1.39 m. When the arrow hits the target 18 m away, it hits point A. When the target is removed, the arrow lands 45 m away. Find the maximum height of the arrow along its parabolic path. My points are

    asked by Lenny on December 5, 2013
  92. Physics Kinematics

    A basketball is launched with an initial speed of 12.0 m/s at 45 degrees from the ground. The height of the basket y = 2.50m. From what distance x the ball is shot? Note : The trajectory is like a basketball shot, the highest point the ball reaches is

    asked by Vishal on February 2, 2015
  93. Physics

    A coin is placed 11.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 31 rpm is reached, at which point the coin slides off. What is

    asked by Anonymous on October 27, 2009
  94. torque physics

    A bowling ball with a radius of 12 cm is given a backspin (i.e. if you picture the ball moving to the right it is spinning counterclockwise at the same time) of 8.3 rad/ s and a forward velocity of 8.5 m/s.As a result, the ball slides along the floor. What

    asked by naf on December 9, 2012
  95. Physics

    A ball is projected upward at time t= 0.0s, from a point on the roof 10m above the ground. The ball rises, then falls until it strikes the ground. The initial velocity of the ball is 58.5 m/s. At time t=5.97s, what is the approximate velocity of the ball?

    asked by Renay on March 22, 2013
  96. statistic

    A sample of 59 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 25 years. The population variance is 19. (a) Give a point estimate for μ. (Give your answer correct to one decimal place.)

    asked by john on April 16, 2013
  97. Physics-circular force

    A coin is placed 11.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 31 rpm is reached, at which point the coin slides off. What is

    asked by Anonymous on October 28, 2009
  98. math

    A fisherman traveled in a boat from point N upstream. After having traveled 6 km, he stopped rowing and 2 hour 40 min after first leaving N, he was brought back to N by the current. Knowing that the speed of the boat in still water is 9 km/hour, find the

    asked by yo on March 27, 2018
  99. math

    A fisherman traveled in a boat from point N upstream. After having traveled 6 km, he stopped rowing and 2 hour 40 min after first leaving N, he was brought back to N by the current. Knowing that the speed of the boat in still water is 9 km/hour, find the

    asked by Sarayu on March 12, 2018
  100. Algebra

    A fisherman traveled in a boat from point N upstream. After having traveled 6 km, he stopped rowing and 4 hour 30 min after first leaving N, he was brought back to N by the current. Knowing that the speed of the boat in still water is 90 km/hour, find the

    asked by Chris Cook on April 30, 2016

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