Posts by Colin

Total # Posts: 119

  1. Math

    A. You basically add two numbers together to get 60. So it's basically __ + __ = 60, and you can put in any two numbers that equal 60 when added. B. It's almost the same as what I said for the first problem, except it's __ x __ = 60, so you find two numbers that ...
  2. math

    1. If each person gets 1 serving, then you would need to get 4 cakes, and have 23 servings left over. If you get 3 cakes, one person won't get any servings of cake, so you need 4 cakes. 2. For this one, you need the time it takes her to complete her 24-mile course, and ...
  3. Math

    Airport control tower measures the distance to one plane taken off at 500m and distance to second plane coming for a landing at 1050m. If the angle between the lines of observation on radar screen is 86 degrees> how far apart are the two planes?
  4. American Government

    lol dad
  5. Chemistry

    If you mix 50.0 mL of a 0.500 M solution of calcium nitrate with 150. mL of a 0.250 M solution of potassium nitrate, what would be the resulting molarity of nitrate ions in the final mixed solution ?
  6. science

    how many atoms of S are there in 3 (NH4)2 SO4
  7. Physics

    You would like to shoot an orange in a tree with your bow and arrow. The orange is hanging 5.00 m above the ground. On your first try, you fire the arrow at 32.0 m/s at an angle of 30.0° above the horizontal from a height of 1.10 m while standing 52.0 m away. Treating the ...
  8. math

    write the number in two other forms 6,007,200 and 32,005,008
  9. math

    write this number in word form 310,763,136 write this number in expanded form 20,484,163
  10. math

    write the number in two other forms 6,007,200 and 32,005,008
  11. worl geography

    It is d because a is federations that's not a type of government, b doesn't make sense and c is not in these countrys
  12. math

    sam makes $400 per week plus $20 commission on each new cell phone plan she sells. Write an equation to determine how many plans she sold to earn $680 last week.
  13. Physics

    A boat beguins on the best side of a river and heads straight east across the river with a speed of 1.9 Ft/s (relative to the water). the river water flows NORTH at the speed of 2.^ Ft/s (relative to the shore). The resultant veliocty of the boat ( relative to the shore) is ...
  14. math

    write this number in two forms 6,007,200 and 32,005,008
  15. Algebra with pizzazz

    it has diabetes
  16. physics

    At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.1 m until, at t = 1.64 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. (b) Find the change in its ...
  17. Magnetism

    A circular wire loop of mass M and radius R carries a current I. It hangs from a hinge that allows it to swing in the direction perpendicular to the plane of the loop. A uniform magnetic field B exists everywhere in space pointing upwards. What angle θ does the plane of ...
  18. magnetis

    A metal spring can be used as a solenoid. The spring is stretched slightly, and a current is passed through it. The resulting magnetic field will cause the spring to a. collapse (shorten) b. stretch (lengthen) c. not change (nothing happens) d. ranslate along the current ...
  19. magnetism

    A charged particle with charge q is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendiculuar to the same magnetic field. The time to complete one full circular revolution for the first particle is...
  20. PHYSICS

    work out the velocity from right hand rule. Remember what current means in terms of conventional current.
  21. electricity and magnets

    Think about conventional current.
  22. magneismt

    what statements?
  23. Physics

    not yet
  24. Physics

    So did this work out Lora?
  25. PHYSICS

    That seems really small.
  26. PHYSICS

    whats h? is that the height 10 cm?
  27. PHYSICS

    There are two things in life, physics and everything else is stamp collecting.
  28. Magnetic effect

    Use kinematic equations for 1. Then you can work out the radius. For 2 what is the equation for potential energy of a magnetic field?
  29. science

    You have a pulley 13.9 cm in diameter and with a mass of 1.7 kg. You get to wondering whether the pulley is uniform. That is, is the mass evenly distributed, or is it concentrated toward the center or the rim? To find out, you hang the pulley on a hook, wrap a string around it...
  30. Chemistry

    2 moles of helium (He) are pumped from a gas canister into a weather balloon. The balloon at this point has a volume V1. 1 mole of nitrogen gas (N2) is added at the same temperature and pressure. The volume of the balloon changes to V2. How will the new volume of the balloon ...
  31. AP CHEM HELP

    When NH3 is added to solid Hg2Cl2, some of the mercury ions are oxidized and some are reduced. A reaction where the same substance is both oxidized and reduced is called a disproportionation reaction. Write equations for each of these half-reactions. HELP
  32. algebra 1

    just like normal equations
  33. physical science

    two cars 200meters apart drive towards one another. If one car travels at 12 meters/s and the other at 26 meters/s how long does it take for them to collide?
  34. 10 grade algebra

    10(x+5)=130 x+5=130/10 x+5=13 x=13-5 x=8
  35. Maths

    I divide exactly by 100 my first two digits are equal the sum of my four digits is 8
  36. Chemistry

    2.00x10^-3
  37. Physics

    Vector A has a magnitude of 5.00 units, vector has a magnitude of 5.00 units, and the dot product A·B has a value of 16. What is the angle between the directions of A and ?
  38. nuclear chemistry

    I know this is too late for you Nancy and you Andrew, but I thought it might be useful for other students out there. So, to solve this problem we: First convert 1.0 MW to W then to J/s 1.0 MW x 10^6 W/MW x ((1.00 J/S)/W) = 1.0 x 10^6 J/s Next we use the binding energy equation...
  39. math

    if 400 customers come to a grand opening and every 5th customers receives a coupon for jeans and every 7th customers receives a coupon for a free sweater. how many customers will leave with both
  40. AP Chem

    (MnO40- + (C2O4)2- + H+ = CO2 + H2O + ? OR (MnO4)- + (C2O4)2-+ OH-=CO2 n+ H2O +? Can somebody please help me predict the products? I can balance it i just need help determining what to balance.
  41. Physics

    a driver sees a horse on the road and applies the brakes so hard that they lock and the car skids to a stop in 24 m. the road is level and the coefficient of kinetic friction between the tires and the road is 0.7. How fast was the car going when the brakes were applied?
  42. AP Chemistry

    thank you that was the only one that i couldn't get. that and number 7. im a little confused on how somebody could do that?
  43. AP Chemistry

    The Synthesis of an Iron Oxalato Complex Salt (“Green Crystals”) In this experiment you will synthesize a compound that will contain the elements potassium, iron, carbon, hydrogen, and oxygen. Carbon and oxygen will be present in the compound as oxalate (C2O4-2) ...
  44. math

    The height, h(t), of a projectile, in metres, can be modelled by the equation h(t) = 14t – 5t2, where t is the time in seconds after the projectile is released. Can the projectile ever reach a height of 9m? Explain.
  45. Math

    We are having an issue trying to solve for purple...
  46. Math

    A toy train has 20 cars- blue, purple and orange. There are 4 times as many blue cars as purple cars. There are 5 times as many orange cars as purple cars. How many of each color are there?
  47. 5th grade religion

    ...
  48. maths

    Marie can afford a $250 per month car payment. She’s found a 5 year loan at 7% interest. a. How expensive of a car can she afford? b. How much total money will she pay the loan company? c. How much of that money is interest?
  49. maths

    How much money will I need to have at retirement so I can withdraw $60,000 a year for 20 years from an account earning 8% compounded annually? a. How much do you need in your account at the beginning b. How much total money will you pull out of the account? c. How much of that...
  50. maths

    You deposit $1000 each year into an account earning 8% compounded annually. a. How much will you have in the account in 10 years? b. How much total money will you put into the account? c. How much total interest will you earn?
  51. maths

    How much would you need to deposit in an account now in order to have $20,000 in the account in 4 years? Assume the account earns 5% interest.
  52. Maths

    How do yo calculate a number to the power of 2.08 i.e. not a whole number. so 4 to the power of 2.08 Thanks.
  53. oceanography

    agreed
  54. chemistry

    The mole fraction of an aqueous solution of magnesium chlorate is 0.371. Calculate the molarity (in mol/L) of the magnesium chlorate solution, if the density of the solution is 1.39 g mL-1.
  55. chemistry

    calculate the pH of 20.00mL of 2.00 M HCl diluted to 0.500 L
  56. Chemistry

    The equilibrium constant for the reaction: 2NO(g)+Br2(g)<==>2NOBr(g) Kc=1.3x10^-2 at 1000 Kelvin Calculate Kc for: NOBr(g)<==>NO(g)+ 1/2Br2(g)
  57. Chemistry

    Calculate the [OH-] for a solution in which [H+] is 1000 times greater than [OH-]? and will the final result be acidic, basic, or neutral?
  58. Chemistry

    assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and is equal to 1.86 C/m .
  59. geometry

    Eg if EF=13cm
  60. physics

    2465
  61. AP Physics

    m1= mass of the bullet m2= mass of the block Vf=sqrt(2gh) v1= initial velocity of bullet v2= initial velocity of the block = 0 so first is conservation of momentum m1v1+m2v2=(m1+v2)Vf solve for v1 (note m2v2=0) v1=((m1+m2)/m2)/Vf to find Vf look at conservation of energy KE+PE...
  62. math

    thx
  63. math

    whats 17.50x30
  64. chemistry

    In the following experiment, a coffee-cup calorimeter containing 100 mL of H20 is used. The initial temperature of the calorimeter is 23.0 C . If 3.60 g of CaCl2is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The heat of the ...
  65. chemistry

    the molarity of a solution composed of 25.4g KHCO3 diluted with water to a total volume of 200 mL
  66. chemistry

    A solution of .12 L of 0.160 M KOH is mixed with a solution of .3 L of 0.230 M NiSO4. the equation for this reaction is: 2KOH (aq)+NiSO4 (aq) ----->K2SO4 (aq)+Ni(OH)2 (s) .89 grams of Ni(OH)2 precipitate form I need to know the concentration remaining in the solution of: 1...
  67. Chemistry 101

    A solution of .12 L of 0.160 M KOH is mixed with a solution of .3 L of 0.230 M NiSO4. the equation for this reaction is: 2KOH (aq)+NiSO4 (aq) ----->K2SO4 (aq)+Ni(OH)2 (s) .89 grams of Ni(OH)2 precipitate form I need to know the concentration remaining in the solution of: 1...
  68. chemistry

    A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400 mL of a solution that has a concentration of Na+ ions of 1.00 M?
  69. math

    Find the slope of the line passing through the points A(-4, 3) and B(4, 2)
  70. science

    what dose porosity mean?
  71. math

    1/3
  72. CHEMISTRY URGENT!!!

    Determine the pH (to two decimal places) of the solution that is produced by mixing 30.3 mL of 1.00×10-4 M HBr with 829 mL of 5.77×10-4 M Ca(OH)2.
  73. Chemistry

    A mixture containing CH3OH, HF, CH3F, and H2O, all at an initial partial pressure of 1.04 atm, is allowed to achieve equilibrium according to the equation below. At equilibrium, the partial pressure of H2O is observed to have increased by 0.43 atm. Determine Kp for this ...
  74. Chemistry

    Determine the volume (in mL) of 0.844 M hydrochloric acid (HCl) that must be added to 38.0 mL of 0.650 M sodium hydrogen phosphate (Na2HPO4) to yield a pH of 6.92. Assume the 5% approximation is valid and report your answer to 3 significant figures. Look up pKa values.
  75. algebra

    9x-12 = 78 (add 12 to both sides) 9x-12+12 = 78+12 (divide by 9 to isolate x) 9x=90 9x/9 = 90/9 x = 10 Check * 9(10) - 12 = 78 (9 x 10) - 12 = 78 90 - 12 = 78 78 = 78
  76. Chemistry

    Determine the molarity (in mol/L) of NO2− ions in solution when 9.77×101 g of sodium nitrite is added to enough water to prepare 3.94×102 mL of the solution.
  77. Physics II

    Jose, whose mass is 75 kg, has just completed his first bungee jump and is now bouncing up and down at the end of the cord. His oscillations have an initial amplitude of 11.0 m and a period of 4.0 s. From what height above the lowest point did Jose jump? k=185 n/m Vmax = 17 m/s
  78. chemistry

    The mole fraction of an aqueous solution of sodium dichromate is 0.367. Calculate the molarity (in mol/L) of the sodium dichromate solution, if the density of the solution is 1.42 g mL-1.
  79. Chemistry

    chemistry question. How many grams of silver sulfide can be produced by heating 45 grams of silver excess sulfer?
  80. physics

    A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to 2.6 times her weight as she goes through the dip. If r = 20.0 m, how fast is the roller coaster ...
  81. physics

    a 5-kg crate is resting on a horizontal plank. the coefficient of static friction is .5 and the coefficient of kinetic friction is .4. after one end of the plank is raised so the plank makes an angle of 25 degrees with the horizontal, the force of friction is?
  82. 3rd grade

    array for 5 times 1
  83. math

    we have a problem that my parents cant help with. 846*2=(...+40+...)*2=(800 over ...+...over2+6 over...)=(400+...+3)...=... ...means blank space for a number. Can you help with this problem, so that I can figure out the rest of the problems.Thanks
  84. 5th grade

    how do you break apart to divide: 648 by 6 using compatible numbers to break apart the dividend.
  85. english

    what about The Story of My Life
  86. Music

    I need a new written add on verse of bob dylan chimes of freedom song has to be 8 lines long and the last line is An' we gazed upon the chimes of freedom flashing.
  87. Physics

    88.89 km/hr
  88. algebra

    Its this symbol^ the computer on our webassign online doesn't recognize it so we need to replace that symbol^with a number so that's where I am lost
  89. algebra

    Need help showing me the steps without using the carrot function: Find the product. (2y + 2z)(2y - 3z)
  90. Math

    The area A of a triangle is given by the formula A=1/2bh If the base of the triangle with height 12 inches is doubled, its area will be increased by 48 square inches. Find the base of the orignial triangle.
  91. Math

    The area A of a triangle is given by the formula A=1/2bh If the base of the triangle with height 12 inches is doubled, its area will be increased by 48 square inches. Find the base of the orignial triangle.
  92. Gr.7 - math

    4. The dimensions of a king-size waterbed are 2.1m, 1.8m, and 23 cm. Find the volume and mass of the water it contains when full.
  93. 7th grade

    5. What is the mass of the water? a. that fills a 1m^3 tank b. that fills a 2L bottle c. that would fill you empty classroom Thanks for your help!
  94. Literature

    I think your essay was good,but in the first paragraph you said "Throughout the year, the children that couldn’t afford designer clothes were made fun of constantly for their attire. Keeping up with the latest fashion trends was a must in our busy school and whoever ...
  95. Reading

    What is the definition of the word embers?
  96. science

    what is a ernmeyer flask and a granulated cylander used for?
  97. Friedman test: Can !?

    I have 28 participants. Each completed five tests. The maximum score a participant could receive on any one test was 4/4. The lowest score anyone could receive was zero. I will do a Friedman test for this paired data. My question: given that I have a very large number of ...
  98. English

    Thanks very much Bob. I much appreciate your taking the trouble to respond. All the best! Colin
  99. English

    I have 28 participants. Each completed five tests. The maximum score a participant could receive on any one test was 4/4. The lowest score anyone could receive was zero. I will do a Friedman test for this paired data. My question: given that I have a very large number of ...
  100. Geography

    Why is it drifting farther away
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