1. Physics

    A 2 stage rocket launches off at an initial angle of 75 degrees above the horizontal. The rocket has a mass of 250 kg, while the stage 1 has a mass of 125 kg, and the stage 2 booster has a mass of 50 kg. At ignition the stage 1 booster gives the rocket a

    asked by Jack on October 4, 2016
  2. Chemistry

    Element X has a face-centered cubic unit cell structure. If the density of the element is measured to be 12.4 g/cm^3, what is the atomic radius of X? units are in pm (picometers) MM: 102.9055 g/mol I have done this 4 different times and came up with the

    asked by Amanda L on February 13, 2017
  3. Physics

    You are flying in an ultra-light aircraft at a speed of 41.4 m/s. An eagle, whose speed is 21.7 m/s, is flying directly toward you. Each of the given speeds is relative to the ground. The eagle emits a shrill cry whose frequency is 3680 Hz. The speed of

    asked by Amena on April 9, 2018
  4. Physical science question 2

    I am definitely lost on this problem. Can someone help me out? A(n) 51.3 kg astronaut becomes separated from the shuttle, while on a spacewalk. She finds herself 50.3 m away from the shuttle and moving with zero speed relative to the shuttle. She has a(n)

    asked by Christy on March 1, 2008
  5. physics

    If an airplane propeller rotates at 1570 rev/min while the airplane flies at a speed of 333 km/h relative to the ground, what is the linear speed of a point on the tip of the propeller, at radius 1.97 m, as seen by (a) the pilot and (b) an observer on the

    asked by kyle on November 9, 2011
  6. Physics

    a ball is thrown up onto a roof, landing 4.70 s later at height h = 24.0 m above the release level. The ball's path just before landing is angled at  = 62.0° with the roof. (a) Find the horizontal distance d it travels. (Hint: One way is to reverse the

    asked by Antonio on September 13, 2010
  7. chemistry

    disappearance of NO in ...- Help!!!? The following data were collected for the rate of disappearance of NO in the reaction 2 NO(g) + O2(g) ¨ 2 NO2(g). Run: [NO](M) [O2](M) Initail Rate (M/s) 1 .0126 .0125 1.41 X 10^-2 2 .0252 .0125 5.64 X 10^-2 3 .0252

    asked by Hannah on January 30, 2013
  8. physics - last question

    Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's observing the trout is

    asked by Sarah N H on January 16, 2010
  9. Algebra

    Volume and surface area are often compared by manufacturers in order to maximize how much of something can go inside of a package (volume) while keeping how much material is required to create the package (surface area) low. Pick a product that might be

    asked by ALAYA on May 24, 2018
  10. chemistry

    For the reaction: A + 3B = 4C Which of the following provides the direct link between the amount of reactant A and the amount of product C? -coefficients in the equation -molar mass of C -the reactant B or -molar mass of A?

    asked by Lisa on November 14, 2011
  11. Physics

    a spring is 30 cm long when a mass of 50 grams is placed when it is at rest. when an additional mass of 20 grams is placed, the spring elongates by 2.5 cm. what is the spring constant and what is the original length of the spring?

    asked by Karl Panelo on May 19, 2016
  12. Physics

    a foam boulder has a mass of 2kg and a velocity of 20m/s. a stone boulder has the same velocity (20m/s) but a mass of 20kg. which of the two has more momentum? Explain.

    asked by Chita_Cheee on April 9, 2012
  13. Physics

    The gravitational force of attraction between two students sitting at their desks in physics class is 2.35 ✕ 10-8 N. If one student has a mass of 46.2 kg and the other student has a mass of 62.6 kg, how far apart are the students sitting?

    asked by Anonymous on January 11, 2014
  14. Physics

    The gravitational force of attraction between two students sitting at their desks in physics class is 2.23 ✕ 10-8 N. If one student has a mass of 52.0 kg and the other student has a mass of 57.4 kg, how far apart are the students sitting?

    asked by Jackson on November 18, 2015
  15. Physics

    What net force F will accelerate a 0.5 kg mass at 4 m/s2? If this same net force were applied to a 20 kg mass, what would its acceleration be? Please show me step by step including the right equations

    asked by Anonymous on October 2, 2016
  16. physics

    a shell of mass 0.020 kg is fired by a gun of mass 100kg.if the muzzle speed of the shell is 80m/s.what is the recoil speed of the gun

    asked by ph on May 22, 2014
  17. Physics

    Calculate the true weight of a 60 kg astronaut on: a) the surface of Mars, and b)the surface of Saturn. Mass of Mars= 6.42x10^23 Mass of Saturn= 5.69x10^26

    asked by mj on December 5, 2015
  18. math

    A small person with a mass of 50kg walks up two flights of stairs. A heavy person with a mass of 105 kg walks up the same stairs. Who did more work and why?

    asked by jace on February 10, 2016
  19. Physics

    a 4 kg object is taken to a planet that has 3 times the mass of earth and 1/2 the radius of earth. On this planet the mass of the object will be most nearly.. A. 12kg B. 3kg C. 48kg D. 4kg E. 24 kg

    asked by NATHAN on January 4, 2015
  20. physics

    A 10 kg mass moving at 6 m/s strikes a stationary 2 kg mass in an elastic collision. Determine the velocity of each after the collision. 10(6)+2(0)=(10)Vf1+(2)Vf2 60=(10)Vf1+(2)Vf2

    asked by alyssa on January 28, 2016
  21. Science

    A new geosynchronous satellite needs an orbit of 35.7 km . The mass of the Earth is 5.97x 10^24 Kg and the radius of Earth 6.4 x 10^3 km. The mass of the satellite is 200 Kg. What velocity will it need to achieve that orbit

    asked by Boberto on November 29, 2016
  22. chemistry

    isotope chromium -51 has a half life of 28 days. If the original sample had a mass of 28.0 grams, what mass of chromium -51 sample remains after 84 days?

    asked by Andrea on December 11, 2014
  23. chemistry

    Knowing the concentration of a solution allows us to find all of the following except A. the mass of a solute. B. the mass of the solvent. C. the volume of the solvent. D. the concentration of a solution when conditions change.

    asked by Natalie on March 19, 2014
  24. Physics

    Car A has a mass of 1000kg and a speed of 60km/h, and car b has a mass of 2000kg and a speed of 30km/h. what is the ratio of kinetic energy of car A to that of car b?

    asked by sam c on May 7, 2012
  25. physics

    Mars has a mass of about 6.8 × 1023 kg, and its moon Phobos has a mass of about 9.5 × 1015 kg. If the magnitude of the gravitational force between the two bodies is 4.66 × 1015 N, how far apart are Mars and Phobos?

    asked by Joe on October 11, 2011
  26. Physics

    A 200 g mass is attached to a spring of spring constant k. The spring is compressed 15 cm from its equilibrium value. When released the mass reaches a speed of 5 m/s. What is the spring constant (in N/m)?

    asked by Zach on January 5, 2012
  27. Science

    A new geosynchronous satellite needs an orbit of 35.7 km . The mass of the Earth is 5.97x 10^24 Kg and the radius of Earth 6.4 x 10^3 km. The mass of the satellite is 200 Kg. What velocity will it need to achieve that orbit?

    asked by Boberto on November 29, 2016
  28. Physics

    The gravitational force of attraction between two students sitting at their desks in physics class is 2.34 ✕ 10^-8 N. If one student has a mass of 45.0 kg and the other student has a mass of 61.6 kg, how far apart are the students sitting?

    asked by Ana on February 9, 2018
  29. maths

    a moon rock sample was 300g when rounded to the nearest 100g. Its exact mass was also a multiple of 10. What mass could the moon rock sample have been?

    asked by sue on November 17, 2014
  30. Physics

    An alloy of iron and silver has a total mass of 30 grams and a volume of 20.4 centimetre cube Calculate the mass of iron only and the volume silver only Please help

    asked by Peter on January 7, 2017
  31. Physics

    A uniform rod of mass 2 kg and length 1.41 m is hinged at its top end and allowed to swing in the vertical plane of the paper. It is initially stationary in a vertical position. A clay ball of mass 0.25 kg is propelled towards its lower end at a speed v.

    asked by Abdus-Samad Gaffoor on January 27, 2017
  32. Physics

    A construction supervisor of mass M = 83.7 kg is standing on a board of mass m = 30.5 kg. The board is supported by two saw horses that are a distance of 4.50 m apart. If the man stands a distance x1 = 1.30 m away from saw horse 1 as shown, what is the

    asked by rory on December 17, 2007
  33. Chemistry

    A mixture of C3H8 and C2H2 has a mass of 2.3g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. What is the mass of C2H2 in the original mixture?

    asked by Matt on October 19, 2013
  34. physics

    Under what condition can a moving object be in a state of equilibrium? If you double the net force on an object and keep the mass constant, how will its acceleration be affected? What will happen to the acceleration if the mass of an object is tripled but

    asked by erwin on December 8, 2011
  35. physics

    A heavy ball A of mass 10kg is moving at a velocity of 10m/s to the right. When it hits a stationary ball B of mass 5kg, ball B moves at a velocity of 10m/s to the right. a) explain whether it is inelastic collision or not.

    asked by Anonymous on November 20, 2010
  36. Science

    A uniform half metre rule is balanced horizontally across a knife edge placed 20cm from A. A mass of 22.5g is hung from end A. 1. What is the mass of the rule 2. What is the force exerted on the rule by the knife edge?

    asked by Maybin on March 12, 2018
  37. physics

    A child in a boat throws a 5.15-kg package out horizontally with a speed of 10.0 m/s. The mass of the child is 24.2kg and the mass of the boat is 33.2kg . Calculate the velocity of the boat immediately after, assuming it was initially at rest.

    asked by Edward on March 14, 2014
  38. physics

    A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular to each other, at 21m/s . The third piece has twice the mass as the other two. What is the speed of the third piece? What is the

    asked by samm on November 10, 2013
  39. physics

    Two packages at UPS start sliding down the 20° ramp shown in Figure P8.25. Package A has a mass of 3.5 kg and a ­coefficient of friction of 0.20. Package B has a mass of 10 kg and a coefficient of friction of 0.15. How long does it take package A to

    asked by Ben on June 16, 2010
  40. chemistry

    If the average quarter weighs 5.67grams, how many atoms of nickel are in a quarter? ie; 91.67%mass/copper 8.33%mass/nickel I took 5.67x0.0833=.47g .47gNi/58.6934=801 atoms nickel? is this right?

    asked by chemdumby on April 26, 2011
  41. Physics

    a singly charged ion of uknown mass moves in a circle of radius 12.5 cm in a magnetic field of 1.7 t. the ion was accelerated through qa potential difference of 5.7 kv before it entered the magnetic field. what is the mass of the ion

    asked by Lala on October 13, 2014
  42. chemistry

    A block of copper of unknown mass has an initial temperature of 66.7 ∘ C . The copper is immersed in a beaker containing 95.5g of water at 20.6 ∘ C . When the two substances reach thermal equilibrium, the final temperature is 26.0 ∘ C .What is the

    asked by k on July 2, 2014
  43. Science 7

    Which of the following boxes would have the strongest gravitational pull on a third object positioned at an equal distance from both boxes? Box A: 100 g Box B: 10,000 g A. box b because it has more mass B. box a because it has less mass C. box a because it

    asked by cat on November 1, 2016
  44. physics

    A satellite is orbit about earth, its orbital radius is 3.43*10e7m.The mass of the satellite is 9166kg and the mass of earth is 5.974*10e24kg. Determine the orbital speed of the satellite in mi/s. 1mi/s=1609m/s.

    asked by shug on October 1, 2010
  45. p3

    A block of wood of mass 0.86 kg is initially at rest. A bullet of mass 0.048 kg traveling at 102.3 m/s strikes the block and becomes embedded in it. With what speed do the block of wood and the bullet move just after the collision?

    asked by opp on March 14, 2012
  46. Chemistry

    the vapor from an unknown volatile liquid occupies a 269 ml. Erlenmeyer flask at 98.7 C and 748 mm Hg. The mass of the vapor is 0.791 g. A. how many moles of vapor are present? B. What is the molar mass of the volatile liquid?

    asked by Bobby on April 24, 2019
  47. physics

    A gymnast with mass m1 = 47 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 118 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the

    asked by Anonymous on March 29, 2011
  48. Physics

    Two objects are connected by a string with a mass less, friction less pulley. The coefficient of friction is .298. The block on the table is 4 kg. What must the mass of the hanging block be so that the block on the table will move with a constant speed?

    asked by Elle on November 19, 2012
  49. physics

    A construction supervisor of mass M = 83.7 kg is standing on a board of mass m = 30.5 kg. The board is supported by two saw horses that are a distance of 4.50 m apart. If the man stands a distance x1 = 1.30 m away from saw horse 1 as shown, what is the

    asked by rory on December 20, 2007
  50. Physics

    A block of wood of mass 0.91 kg is initially at rest. A bullet of mass 0.047 kg traveling at 104.7 m/s strikes the block and becomes embedded in it. With what speed do the block of wood and the bullet move just after the collision?

    asked by Max on March 31, 2010
  51. As Physics

    Use the equations below: P=mv Ek=1/2mv^2 4) A wooden target of mass 2.00kg is suspended from a branch so that it swings freely. The target is hit by an arrow of mass 0.10kg travelling horizontally and the arrow embeds itself in the centre of the target.

    asked by cake on November 30, 2017
  52. history

    please check: what effect did the Bakke decision have on affirmative action? a. it legalized racial quotas for admission to medical schools b. it encouraged African Americans to apply to medical schools c. it signaled the start of a backlash against

    asked by history on April 19, 2009
  53. Psychology

    For an IQ test, we know the population _ 5 100 and the _X 5 16. We are interested in creating the sampling distribution when N 5 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean

    asked by Joy on February 2, 2014
  54. Statistics

    For an IQ test, we know the population n=100 and the ox = 16. We are interested in creating the sampling distribution when N = 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean of

    asked by Tonya on February 3, 2014
  55. PSY

    For an IQ test, we know the population _ 5 100 and the _X 5 16. We are interested in creating the sampling distribution when N 5 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean

    asked by Joy on February 2, 2014
  56. physics

    1)A toy train is initially at rest on a track fastened to a bicycle wheel, which is free to rotate. How does the wheel respond when the train moves clockwise? When the train backs up? Does the angular momentum of the wheel-train system change during these

    asked by Confused on July 9, 2010
  57. acid-base titrations

    For each of the following circumstances, indicate whether the calculated molarity of NaOH would be lower, higher or unaffected. Explain your answer in each case. a.the inside of the pipet used to transfer the standard HCI solution was wet with water. b.You

    asked by natash on April 21, 2008
  58. physics-mechanics-collisions,momentum, impulse

    You are at the controls of a particle accelerator, sending a beam of 2.40×107 protons (mass ) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown

    asked by HANNE on October 28, 2012
  59. Physics

    Two blocks are connected over a massless, frictionless pulley. The mass of block 2 is 8.00 kg, and the coefficient of kinetic friction between block 2 and the incline is 0.250. The angle θ of the incline is 28.0°. Block 2 slides down the incline at

    asked by Aron on September 30, 2016
  60. physics

    a bullet of mass 0.01kg and travelling at a speed of 500m/s strikes a block of mass 2kg which is suspended by a string length 5m. the centre of gravity of block is found to rise a vertical distance of 0.1m .Calculate the speed of the bullet when it emerges

    asked by Anonymous on January 25, 2018
  61. physics

    A 1kg mass is suspended from a vertical spring with a spring constant of 100 N/m and the equilibrium position is noted. The spring is then pushed upward (compressed) a distance x=10 cm before the mass is released from rest. How fast will the block be

    asked by susanna on November 11, 2009
  62. Physics

    A uniform solid cylinder of mass M and radius R is at rest on a slab of mass m, which in turn rests on a horizontal, frictionless table. If a horizontal force is applied to the slab, it accelerates and the cylinder rolls without slipping. Find the

    asked by Amjad on October 8, 2012
  63. PLEASE HELP ME SOLVE !!!!!!!!

    A mass of 11 kg is placed on a frictionless incline which is inclined at an angle of 69 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 13 degrees above the direction

    asked by Katie on October 6, 2011
  64. Physics

    A bucket of water with a mass of 4.0 kg is attached to a rope that is wound around a cylinder. The cylinder has a mass of 8.0 kg and is mounted horizontally on frictionless bearings. The bucket is released from rest. (a) Find its speed after it has fallen

    asked by Priyanka on March 25, 2012
  65. PHYSICS

    A window washer pulls herself upward using the bucket-pulley apparatus.. Part A) How hard must she pull downward to raise herself slowly at constant speed? The mass of the person plus the bucket is 80 kg . Part B) If she increases this force by 16 %, what

    asked by henry on February 4, 2017
  66. physics

    A mass of 11 kg is placed on a frictionless incline which is inclined at an angle of 69 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 13 degrees above the direction

    asked by Kaleigh on October 6, 2011
  67. Physics

    Two people with a combined mass of 135 kg hop into an old car with worn-out shock absorbers. This causes the springs to compress by 9.80 cm. When the car hits a bump in the road, it oscillates up and down with a period of 1.76 s. Find the total load

    asked by Cooper on November 17, 2011
  68. physics

    The drawing shows a hydraulic chamber in which a spring (spring constant = 1292 N/m) is attached to the input piston, and a rock of mass 24.7 kg rests on the output plunger. The piston and plunger are at the same height, and each has a negligible mass. By

    asked by josh on December 4, 2010
  69. physic

    Two people with a combined mass of 130 kg hop into an old car with worn-out shock absorbers. This causes the springs to compress by 9.50 cm. When the car hits a bump in the road, it oscillates up and down with a period of 1.66 s. Find the total load

    asked by shaz on November 20, 2011
  70. Physics

    Two masses are suspended from a pulley as shown in the figure . The pulley itself has a mass of 0.30 kg, a radius of 0.20 m, and a constant torque of 0.30 m \cdot N due to the friction between the rotating pulley and its axle. What is the magnitude of the

    asked by Stacy on November 28, 2010
  71. physics

    The drawing shows a hydraulic chamber in which a spring (spring constant = 1292 N/m) is attached to the input piston, and a rock of mass 24.7 kg rests on the output plunger. The piston and plunger are at the same height, and each has a negligible mass. By

    asked by josh on December 6, 2010
  72. Physics

    Two masses are suspended from a pulley as shown in the figure . The pulley itself has a mass of 0.30 kg, a radius of 0.20 m, and a constant torque of 0.30 m \cdot N due to the friction between the rotating pulley and its axle. What is the magnitude of the

    asked by Garry on November 28, 2010
  73. Physics

    A uniform rod AB of length 2a and mass M is freely pivoted at A and is held with B vertically above A. It is then allowed to fall and when B is vertically below A it strikes a stationary particle , also of mass M,which sticks to the rod at B. The rod then

    asked by Theresa on May 26, 2012
  74. Math m1

    A car of mass 1 tonne is towing a trailer of mass 400kg. They are connected by a rigid rod. Initially they are travelling at a constant speed. The car then accelerates. If the force in the rod is 600 N, find the acceleration of the car and the driving

    asked by Stephan on February 2, 2017
  75. Astronomy

    Suppose the Moon is at a (center-to-center) distance D from Earth. Find an exact expression for the magnitude of the tidal force applied by Earth to our rock of mass m in terms of D, m, the mass of Earth Me (input as M_e), and the lunar radius Rm (input as

    asked by sam on December 23, 2012
  76. Statistics

    We have calculated a 95% confidence interval for a proportion and would prefer the confidence interval to be more precise, that is narrower. Using the same sample, we can narrow the confidence interval using which of the following? A) increasing the

    asked by Nick on October 27, 2013
  77. College Physics

    At what temperature is the root-mean-square speed of nitrogen molecules equal to the root-mean-square speed of hydrogen molecules at 126 oC? (Hint: The molar mass of hydrogen atoms is 1.008 g/mol and of nitrogen atoms is 14.007 g/mol. The molar mass of H2

    asked by Desperate Student on March 26, 2016
  78. Chemistry (polarity)

    I have to determine whether these certain chemicals are polar or not: Beta- sitosterol Methyl cinnamate Lapachol Ethyl p-hydroxy cinnamate Betulic acid 3,4,5- trihydroxy-7-methoxy flavone Veratric acid p-anixic acid If there is a website that could make

    asked by Jennifer on January 7, 2007
  79. science( chem)

    When 100.0ml of a weak acid was titrated with 0.09381M NaOH, 27.63ml were required to reach the equivalence point. The pH at the equivalence point was 10.99. What was the pH when only 19.47ml of NaOH had been added ? I'll just post my work and I need

    asked by christina on July 22, 2007
  80. physics

    if you are an observer moving at 3.2 m/s towards an object that is moving toward you at 1.4 m/s, what is the relative velocity of the object moving toward you?

    asked by jacob on September 16, 2010
  81. Physics Momentum: Elastic Collision

    The carbon isotope 14C is used for carbon dating of objects. A 14C nucleus can change into a different kind of element, a neighbor on the periodic table with lower mass, by emitting a beta particle – an electron or positron – plus a neutrino or an

    asked by Anonymous on July 22, 2015
  82. Physics

    The carbon isotope 14C is used for carbon dating of objects.  A  14C nucleus can change into a different kind of element, a neighbor on the periodic table with lower mass, by emitting a beta particle – an electron or positron – plus a neutrino or an

    asked by Courtney on July 10, 2017
  83. Physics!!! HELP!!

    The carbon isotope 14C is used for carbon dating of objects. A 14C nucleus can change into a different kind of element, a neighbor on the periodic table with lower mass, by emitting a beta particle – an electron or positron – plus a neutrino or an

    asked by Randy on November 7, 2017
  84. Physics/ Chemistry

    The carbon isotope 14C is used for carbon dating of objects. A 14C nucleus can change into a different kind of element, a neighbor on the periodic table with lower mass, by emitting a beta particle – an electron or positron – plus a neutrino or an

    asked by Anonymous on July 22, 2015
  85. Statistics

    Please help me with this question: For an IQ test, we know the population  5 100 and the X 5 16. We are interested in creating the sampling distribution when N 5 64. (a) What does that sampling distribution of means show? (b) What is the shape of the

    asked by Tonya on February 2, 2014
  86. physic

    Two spheres of mass M1 = 810 kg and M2 = 390 kg are placed 4.80 m apart. A particle of mass m = 12.0 kg is now placed midway between the two spheres. (a) What is the net gravitational force on the particle due to the two spheres? N toward the sphere of M1

    asked by joy on February 21, 2018
  87. physics-mechanics-collisions,momentum, impulse

    You are at the controls of a particle accelerator, sending a beam of 2.40×107 protons (mass ) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown

    asked by HANNE on October 27, 2012
  88. chemistry

    Please, can someone help me? How do the submicroscopic and macroscopic views of matter differ? How are the submicroscopic and macroscopic views related? Also, what are the submicroscopic and macroscopic views? Thanks! submicroscopic = atomic macroscopic =

    asked by Maryann on October 31, 2006
  89. physics

    two aircraft P & Q are flying at the same speed, 300m/s.The direction along which P is flying is at right angle to the direction along which Q is flying. find the magnitude of the velocity of the aircraft P relative to aircraft Q?

    asked by biruk zenabe on November 16, 2017
  90. physics

    two air craft P and Q are flying at the same speed 300m/s .the direction along which Q is flying .find the magnitude of the velocity of air craft P relative to air craft Q?

    asked by goytana selomon on January 10, 2019
  91. chemistry

    Covalent bonds are formed when two atoms share electrons. The pairs of electrons which are shared between atoms and hence number of covalent bonds, can be represented by the number of lines drawn between the symbols for the atoms. For example, a single

    asked by trigger on December 30, 2008
  92. physics

    an airplane flies 200 km due west from city A and then 350 km in the direction of 32.0 degrees north of west from city B to city C. a) in a straight-line distance, how far is city c from city a? b) relative to city a, what direction is city c?

    asked by Anonymous on August 31, 2011
  93. physics

    an airplane flies 200 km due west from city A and then 350 km in the direction of 32.0 degrees north of west from city B to city C. a) in a straight-line distance, how far is city c from city a? b) relative to city a, what direction is city c?

    asked by Anonymous on August 31, 2011
  94. social problems

    Justin makes a comfortable living as a construction worker. Other people who were in high school with him have bigger houses and drive fancier cars. Justin thinks he deserves to have more money, so he begins to make plans to rob a bank. What theory of

    asked by robby on June 2, 2014
  95. mechanics

    You release a ball from rest attached to a string as shown in Figure A. The ball swings freely, and at the bottom of its circular path it strikes a stationary block. The block slides to the left with a speed of 4ms, and the ball bounces back to the right.

    asked by juanpro on July 6, 2014
  96. Physics

    The base of a record player is a disk that has a mass of 2 kg and a diameter of 34 cm. A child spins it so it rotates at a constant rate of 50 times a minute. Neglect friction and all that stuff that complicates problems! Then, the child drops on a record

    asked by tyger2020 on December 10, 2018
  97. chemistry

    A student generates H2(g) over water using the reaction between zinc and hydrochloric acid Zn(s)+ 2HCl(aq)---> ZnCl2(aq)+ H2(g) Data: Mass of vial and zinc 15.5082 mass of vial 15.3972 mass of zinc 0.111 final burette reading 45.30mL barometric pressure:

    asked by Yuli on November 24, 2011
  98. dynamics

    cars A and B are d=60m apart and traveling respectively with constant speeds v1=32km/h and v2=24km/h on an ice covered road.knowing that 45s after driver A apples his breaks to avoid overtaking car Bthe two cars collide,determine a)the uniform deceleration

    asked by rajesh on October 8, 2012
  99. statistics

    Each of the following is a confidence interval for u = true average(population mean) resonance frequency (Hz) for all tennis rackets of a certain type: (114.4, 115.6) (114.1, 115.9) A) What is the value of the sample mean resonance frequency? B) Both

    asked by joe on November 23, 2012
  100. statistics

    Each of the following is a confidence interval for u = true average(population mean) resonance frequency (Hz) for all tennis rackets of a certain type: (114.4, 115.6) (114.1, 115.9) A) What is the value of the sample mean resonance frequency? B) Both

    asked by joe on November 23, 2012

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