Questions Asked on
December 15, 2010

  1. chemistry HELP!

    Solve an equilibrium problem (using an ICE table) to calculate the pH of each solution: a solution that is 0.170 M in HC2H3O2 and 0.105 M in KC2H3O2

    asked by Lisa
  2. Chemistry

    a chemist needs to order Na2B4O7. One supplier offers it in an anhydrous (without water) form, while another offers it as a hydrated crystal, Na2B4O7*10H20. if the prices from the two suppliers are the same for a 500.0-g bottle, which one would supply more

    asked by Anonymous
  3. physics

    20 kg , 30 cm diameter disk is spinning at 300 rpm. How much friction force must be applied to rim to bring the disk to a halt in 3.0s?

    asked by Justin
  4. chem

    Consider the following unbalanced equation: C2H5OH(g) + O2(g) → CO2(g) + H2O(l) 1.55 g of ethanol reacts with 10.0 g of oxygen. What is the total volume of gas present (in L) after the reaction is complete, assuming the reaction takes place at 1.00 atm

    asked by Bogdanam
  5. Chemistry

    What is the percent by mass of glucose in a solution containing 0.15 moles of glucose dissolved in 410g acetic acid? The molar mass of glucose is 180g/mol

    asked by Lauren smith
  6. physics

    2. A heavy box is pulled across a wooden floor with a rope. The rope forms an angle of 60.0°with the floor. A tension of 80.0° N maintained on the rope. What are the horizontal and vertical components of the force?

    asked by Anonymous
  7. Physics

    How long would it take a kettle with a 1kW heating element to heat 1 litre of water? Watts = Joules / second • Mass of 1 litre of water = 1kg • 1 kW = 1 k Joule / second or 1000 joules/ second • 1g of water needs 4.184J to raise the temperature by

    asked by Paul
  8. chemistry

    Predict qualitatively whether the salts below dissolve to give solutions that are acidic, basic or neutral. what is the rule for figuring this out? a. KNO2 - basic b. Ng(NO3)2 - neutral c. NH4ClO2 - acidic d. NaHCO3 - basic

    asked by Lisa
  9. English

    Seven brothers' families grew to more than one thousand people in 100 years. Does families need an apostrophe? The mens group made t-shirts for the children. would mens be 's or s' ?

    asked by jill
  10. chemistry

    calculate the pH of a 1.94M solution of nitrous acid (HNO2 - ka = 4.5E-4).

    asked by Tara
  11. Physics

    What would be the weight of a 1.0kg mass on the surface of Mars? The mass of Mars is 0.11 that of the earth, and its radius is 0.53 that of the earth.

    asked by Universal Gravitation
  12. chem

    15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.22 M lead(II) nitrate solution. What is the concentration of phosphate ions left in solution after the reaction is complete? A) 0.0 M B) 0.045 M C) 0.13 M D) 0.060 M E) 0.12 M

    asked by Bogdanam
  13. Chem

    Which of the following solutions would require the greatest volume of 1.0M NaOH for complete neturalization? a)10.0ml of 1.0M HCl b) " of 2.0 M H2S04 c) " of 3.0M H3P04 d) " of 4.0M H2C204 I don't understand what to do to solve it.

    asked by Chels
  14. Chemistry

    Copper sulfate is a hydrated crystal with the formula CuSO4*5H20 and a deep blue color. when its heated, the crystals crumble and turn white. (a) propose an explanation for this change of color. (b) what would you do to restore the blue color?

    asked by Anonymous
  15. math

    Lily went for 8 rides at the county fair. Some rides were on the merry-go-round, and the rest were on the pirate ship. The total cost of all rides was $6.30. Each pirate ship ride cost $0.60, and each merry-go-round cost $0.90. How many pirate ship did

    asked by Evelyn
  16. Chemistry

    The gaseous product of a reaction is collected in a 25.0-L container at 27 C. The pressure in the container is 216 kPa, and the gas has a mass of 96.0 g. What is the molar mass of the gas?

    asked by Ashleigh
  17. physics

    A friend throws a baseball horizontally. He releases it at a height of 2.0 m and it lands 21 m from his front foot, which is directly below the point at which he released the baseball. (a) How long was it in the air? (b) How fast did he throw it?

    asked by molly schwalje
  18. physics

    A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate of freefall acceleration on this airless moon is 2.79 m/s2. (a) How long does it take for the box to reach the moon's surface?

    asked by kevin giordano
  19. chem

    The heat of combustion of bituminous coal is 2.50 × 104 J/g. What quantity of the coal is required to produce the energy to convert 137.7 pounds of ice at 0.00°C to steam at 100.°C? specific heat (ice) = 2.10 J/g°C specific heat (water) = 4.18 J/g°C

    asked by Bogdanam
  20. Chemistry (URGENT)

    A gas mixture with a total pressure of 770 contains each of the following gases at the indicated partial pressures: CO2 , 249mmHg ; , Ar 114mmHg ; and , O2 174mmHg . The mixture also contains helium gas. 1. What is the partial pressure of the helium gas?

    asked by Ashley
  21. Math

    Cliff has some money he wants to invest for his retirement. He is offered two options: 1. 10%/a simple interest 2. 5%/a compounded annually Under what conditions should he choose the first option?

    asked by Emily
  22. Chemistry

    For the reaction: 2H+(aq) + CO3-2(aq) --> CO2(g) + H2O(l) A. Calculate the deltaHºrxn for the reaction. Given deltaHºf for CO3-2(aq) = -677.1 kJ/mol. B. Using the above reaction, what would be the final temperature of a coffee cup calorimeter when 0.104

    asked by Millie
  23. chemistry

    Some hydrogen and iodine are mixed up at 229 degrees celsiusin a 1-L container. When equilibrium is established, the following concentrations are present: [HI]= 0.490M, [H2]=0.080M, and [I2]= 0.060M. If an additional 0.300 mol of HI is then added, what

    asked by jlh
  24. Physics

    A merry-go-round is rotating at 4.775 revs/min with a 45 kg child on the outer edge. The radius is 2.0 m. The child moves to the centre of the merry go round. What is the final angular velocity of the merry go round. The moment of inertia of the

    asked by Jon
  25. physics

    Derek the drunk driver drives his car off the road, onto a gravel strip next to the road. Derek does not have anti-lock brakes, so his wheels lock when he enters the gravel area, and the car slides to a halt. Derek's car is traveling at a speed of 20m/s

    asked by aok
  26. geometry

    Write the converse, inverse, and contrapositive of the conditional statement. If an animal is a bird, then it has two eyes.

    asked by Kaylaa
  27. physics

    Two boxes are seen to accelerate at the same rate when a force F is applied to the first and 5 F is applied the second. What is the mass ratio of the first box to the second?

    asked by jane
  28. Math

    Cliff has some money he wants to invest for his retirement. He is offered two options: 1. 10%/a simple interest 2. 5%/a compounded annually

    asked by Emily
  29. chemistry

    what is the total number of joules released when a 5.00 gram sample of water changes from liquid to gas at 100 degrees Celsius?

    asked by Help
  30. Physics

    A ferris wheel, radius 5.0m, rotates once every 8.4 seconds. a) What is the centripetal acceleration of a 60kg person at the circumference? b) calculate the force of the seat on the person at the highest point. c) calculate the force of the seat on the

    asked by Jon
  31. 11th grade

    Is this sentence punctuated correctly. My garden is full of water, because of yesterday's rain

    asked by Anonymous
  32. chemistry

    How many moles of water, H2O, are present in 75.0 g H2O?

    asked by t
  33. algebra

    A boat's crew rowed 13.5 miles downstream, with the current, in 1.5 hours. The return trip upstream against the current covered the same distance, but took 4.5 hours. Find the crew's rowing rate in still water and the rate of the current.

    asked by tiara
  34. Physics

    A 1000kg space craft at 500m/s is on a collision course with a 400kg satellite travelling at 700m/s. Their paths are converging at a 45 degree angle. After the collision, they remain locked together. a) calculate their final speed b) calculate the quantity

    asked by Jon
  35. math

    There are a total of 107 foreign language students in a high school where they offer only Spanish, French, and German. 42 take Spanish. 46 take French. 45 take German. 8 take Spanish and French but not German. 8 take Spanish and German but no French. 6

    asked by Christy
  36. chem

    When an electric discharge is passed through boron trichloride a new compound is formed. what is its simplest formula if on analysis it is shown to contain .0878 g of chlorine and .0131 g of boron?

    asked by christine
  37. Math

    Suppose you are managing 25 employees, and you need to form three teams to work on three different projects. Assume that all employees will work on exactly one team. Also, each employee has the same qualifications/skills, so any employee can serve on any

    asked by David
  38. Statistics

    In a survey of 1037 adults from the United States age 65 and over, 643 were concerned about getting the flu. Construct a 90% confidence interval for the population proportion.

    asked by Christina
  39. Algebra 2

    A man is planning to invest up to $22,000in bank X or bank Y or both. He wants to invest at least $2,000 but no more than $14,000 in bank X. Bank Y doesn't insure more than a $15,000 investment so he will not invest no more than that in bank Y. The intrest

    asked by Kelsie
  40. math

    dara spent 25% of his money in one shop , he spent 33 1/3 of the remainder and had £6.80 left , how much had he at first

    asked by Graham
  41. CHEMISTRY TITRATION Q

    The titration of 25.00mL of Ba(OH)2 solution with an aqueous solution of 0.500 M HCl reaches an end point when 30.20 mL of the HCl solution is added. Determine the concentration of M of the Ba(OH)2 solution. Soo 25.00mL=0.025L 30.20mL= 0.0302L moles= MxL

    asked by LISA
  42. physics

    A cannon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5 m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?

    asked by katerina C.
  43. physics

    A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate of freefall acceleration on this airless moon is 2.79 m/s2. (a) How long does it take for the box to reach the moon's surface?

    asked by misha shrutt
  44. 10th grade

    Describe the geography of Southern South America and how this geography influences economic activity?

    asked by kaitlyn
  45. physics

    A car moving at 20m/s is sounding its horn as it approaches you. If the actual frequency of the horn is 283 Hz, what frequency will you hear at 25.0 degrees C?

    asked by Hannah
  46. geology

    Apart from the composition of the rock itself, what climate do you imagine is more conducive to physical weathering? and Chemical weathering? I know physical weathering is from wind and water transporting the eroded rocks and particles. Chemical weathering

    asked by m
  47. college

    Translate to an equation: r $2 roses and t $2.50 tulips total $30 graph the equation and use the graph to determie three different combinations of roses and tulips that total $30.

    asked by Kristie
  48. math

    Find the area bounded by the parabola y^2=4x and the line y=2x-4. Use vertical representative rectangles (integrate with respect to x) and horizontal representative rectangles (integrate with respect to y). the answer is 9 square units ... i just need to

    asked by ashton
  49. chemistry

    A researcher put 10.0 moles of N2O into a 2-L container at some temperature where it decomposes according to the following: N2O = 2N2+ O2. At equilibrium 2.20 moles of N2O remain. Calculate the Kc for the reaction.

    asked by Jessica
  50. PHYSICS

    Two railroad cars, each of mass 7600KG and traveling 85KM/H in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision?

    asked by HELP ASAP
  51. Physics

    A 1000kg space craft at 500m/s is on a collision course with a 400kg satellite travelling at 700m/s. Their paths are converging at a 45 degree angle. After the collision, they remain locked together. a) calculate their final speed b) calculate the quantity

    asked by Jon
  52. College Calc 1

    Find the area bounded by the parabola y^2=4x and the line y=2x-4. Use vertical representative rectangles (integrate with respect to x) and horizontal representative rectangles (integrate with respect to y). the answer is 9 square units ... i just need to

    asked by Ashton
  53. Chem

    What is the equilibrium constant expression for the predominant equilibrium in HPO4^2- (aq)?

    asked by Liz
  54. chemistry

    A researcher put 10.0 moles of N2O into a 2-L container at some temperature where it decomposes according to the following: N2O = 2N2+ O2. At equilibrium 2.20 moles of N2O remain. Calculate the Kc for the reaction.

    asked by Jessica
  55. science

    2H2(g) + O2(g) = 2H2O (l) Calculate the volume of Hydrogen gas at STP required to produce an amount of energy equivalent to that produced by the combustion of a gallon of octane. The density of octane is 2.66 kg/gal, and its standard enthalpy of formation

    asked by alex
  56. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos
  57. Chem

    which of the following occurs when a sample of 0.1M HNO3 is tested? a) phenolphthalein turns pink b) bromthymol blue turns yellow c) Ca9s) reacts and produces CO2 (g) d) Na (s) reacts and rpoduces NO2 (g)

    asked by Liz
  58. Help pls

    A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate of freefall acceleration on this airless moon is 2.79 m/s2. (a) How long does it take for the box to reach the moon's surface?

    asked by misha shrutt
  59. government

    Describe two ways the federal bureaucracy helps to shape laws passed by Congress.

    asked by Anonymous
  60. Language arts 7th grade

    how would you write a 2:2 Jane Schaeffer paragraph?

    asked by Sidney
  61. 11th grade

    mr.reyes's geometry class built kites.of the 32 students in class, 87.5% of the kites flew.of the remaining kites, 75% of kites were unfinished.how many kites were finished but did not fly?

    asked by Anonymous
  62. infinitives

    You have two choices, to stay or to go. to stay and to go are the infinitives they are used as adjectives?

    asked by michael
  63. physics

    if you exert a force of 500 N to walk 4 m up a flight of stairs in 4 s, how much

    asked by tom
  64. math

    My study group is lost on this one also.. Suppose you are managing 25 employees, and you need to form three teams to work on three different projects. Assume that all employees will work on exactly one team. Also, each employee has the same

    asked by Friends
  65. physics

    A 1.5 kg otter starts from rest at the top of a muddy incline 87.1 cm long and slides down to the bottom in 0.60 s. What net external force acts on the otter along the incline?

    asked by jane
  66. Science

    Where on a rollercoaster is potential energy the greatest? The least? Please help me, this is due tomorrow. I have a bunch of other questions along with this. I am such a procrasinator. >.< Thank you! -Pancake

    asked by The Official Pancake Queen
  67. hypothesis statistic

    how a t Test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a z-score. Respond to at least two of your fellow

    asked by smith
  68. calculus

    The base of a certain solid is the triangle with vertices at (-10,5), (5,5), and the origin. Cross-sections perpendicular to the y-axis are squares. What is the volume of the solid?

    asked by Anonymous
  69. physics

    A 1300 sports car accelerates from rest to 95KM/H in 7.0S .What is the average power delivered by the engine?

    asked by HELP
  70. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos
  71. World history

    During early civilizations why did most cities rise in river valleys? a.River valleys provided work to men who built dikes and canals b.People built cities on riverbanks for easy access to travel and trade c.city-state goverment centers were located in

    asked by alley
  72. physics

    school question? A long jumper travels 8.95 meters during a jump. He moves at 10.8 m/s when starts his leap. At what angle from the horizontal must he have been moving when he started his jump? You may need the double-angle formula: 2 sin u cos u = sin

    asked by kevin giordano
  73. Chemistry

    Determine how many milliliters of 0.448 M HClO4 will be required to neutralize 38.30 g Ca(OH)2 according to the reaction: 2HCl+Ca(ClO4)2+2H20

    asked by Anonymous
  74. physics

    A long jumper travels 8.95 meters during a jump. He moves at 10.8 m/s when starts his leap. At what angle from the horizontal must he have been moving when he started his jump? You may need the double-angle formula: 2 sin u cos u = sin (2u)

    asked by sue
  75. science

    what properties of carbon explain its ability to form many macromolecules?

    asked by hannah
  76. infinitives

    Last Friday, Sam went to high school to sign up for a class. to high school infinitive to sign up infin. Are they both adverb phrases answering where and why?

    asked by michael
  77. Aims math [help please very appreciated]

    Solve fro x. 15x+4=21+2x

    asked by Amy
  78. chemistry 110

    Calculate the empirical formula of a compound containing 52.14% C, 13.12% H, and 34.73% O. I don't understand how they got the answer. please help

    asked by kim k
  79. chemistry

    a buffer is made by mixing 0.1 moles of acetic acd a sodium acetate in 500 ml of solution. determine the pH of the buffer. (Ka for acetic acid - 1.8E-5)

    asked by Tara
  80. 6th grade

    why Martin Luther King and Rosa Parks visit to Paterson NJ was important and why they need to be memorialized and celebrate to promote their memory and legacy. I have no idea what to write please

    asked by ym
  81. AP Calculus

    True or False If f'(c)=0=f''(c)is less than 0, the f(c) is a local maximum. Justify your answer.

    asked by Smith
  82. science

    what property of the materials used in computer chips makes them useful as switches that trun electricty on and off

    asked by yuku
  83. science

    what type of readioactive decay results in uranium-238 becoming thorium-234?

    asked by yuku
  84. calculus

    The base of a certain solid is the triangle with vertices at (-10,5), (5,5), and the origin. Cross-sections perpendicular to the y-axis are squares. What is the volume of the solid?

    asked by Anonymous
  85. Chemistry

    Green Light has a frequency of about 6.00 * 10^14 s^-1. What is the energy of the green light?

    asked by Ashley
  86. Chemistry

    Can the 5% approximation be used to determine the pH of the following solutions? How do I do this question? (A) 0.56 M hypochlorous acid - yes (B) 3.00 M nitrous acid - yes (C) 0.010 formic acid - no

    asked by LISA
  87. 12th grade

    one type of probability used everyday is: a)experienced probability b)scientific probability c)frequency of occurence d)none of the above

    asked by david
  88. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos
  89. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos
  90. Global Business

    1250 words Prepare a financial overview for your global venture (Sugar / Mexico). Include a chart that represents the general budget for your global venture. Explain how your company deals with foreign exchange risk for your global operation. Identify

    asked by lila
  91. 7th grade

    how do you find the range of a math problem if you have all even numbers?

    asked by jenny
  92. math

    two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. How many minutes elapse between consecutive meetings of the runners?Express your

    asked by Shane
  93. Chemistry

    A 16.48 g sample of potassium permanganate is dissolved in a 250.0 mL volumetric flask. A 125.1 mL sample of the potassium permanganate solution is added to 75.3 mL of 5.110 M hydrobromic acid in which 32.3 mL of ethanol has been dissolved (d = 0.7891

    asked by Millie
  94. 12th grade

    can anyone explain how to divide in algebra? I have this problem: (15x2-24+9)/(3x-3) I am not looking for someone to give me the answer straight out I just need to know how to get there.

    asked by trina
  95. physics

    a girl lifts a 100 N load a height of 2.0 m in a time of 0.5 s. what power does the girl produce?

    asked by Anonymous
  96. chem

    Determine whether Cd^2+ can be separated from Zn^2+ by bubbling H2S through a 0.3 M HCl solution that contains 0.005M Cd^2+ and 0.005 M Zn ^2+. Ksp for CdS is 8*10^-7. Ksp for ZnS is 3*10^-2

    asked by coleman
  97. Creative Writing

    I need helps with finding the mood for this: Your school needs more money for basic supplies. I kind of have to "beef" that sentence up to show the mood better, but I don't know how to do that. HELP?!?!

    asked by Gabbi
  98. social studies

    In 1973, Congress enacted the endagered species Act (ESA) to protect plants and animals from extinction. Many methods are used for protection. Residential or commercial developments may be banned in an area that is set aside to protect animal or plant

    asked by esmeralda
  99. math

    A woman throws a cricket ball upwards into the air. The ball leaves the womans hand at 1.8m above the ground at speed of 9.7. It rises and then falls back to the ground. Considering the energies involved calculate the speed at the point it hits the ground.

    asked by joleen
  100. geometry

    Given Isosceles trapezoid ABCD. AB = 3x - 4 and CD = x + 12. Find AB. Isosceles trapezoid A B C D is drawn. 2 8 16 20

    asked by cc
  101. calculus

    what is the equation of the tangent line to the curve x^3 + 2y^2 + 3xy = 6 at the point (1,1)?

    asked by Sasha
  102. English

    1. You have to wait longer to meet him. 2. You have to stay longer to meet. 3. We can not meet yet. 4. We have to wait longer to meet. 5. It will take longer to meet. (Are they all grammatical? Are they similar in meanings?)

    asked by rfvv
  103. math fractions

    how do you put 7/16, 5/8, and 3/4 in order from greatest to least

    asked by lexi
  104. American History

    Hello I just got done with a homework assignment in American History and there is this one question that has been bugging me: Which of the following is true of the columbus legend? a. He was the only voyager who believed the Earth was round. b. He was the

    asked by Anthony
  105. math

    im a 5th grader and im wondering what3121 is divided by 81 and what is 8921 divided by 59

    asked by gia
  106. psy325

    For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

    asked by smith
  107. Chemistry

    I need a creative title for a lab report that deals with using dalton's partial pressure law in order to determine the amount of hydrogen gas that was collected over water. any ideas?

    asked by Jacob
  108. Writing

    What can I write about? (holidays, History people,etc.)

    asked by Erin
  109. analysis of variance

    which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions and limitations of the analysis of variance in comparison with the t test including a discussion of post hoc tests

    asked by smith
  110. chi-square test

    the assumptions for using a chi-square test. Research articles provide practical examples from the research to support your assumptions. Include a citation of one article you used for your research

    asked by smith
  111. math

    Losing your bags during airline travel is not all that uncommon. Recently, an airline was cited for losing customers' baggage 8% of the time. A test is conducted by randomly selecting 20 customers for that airline and observing whether they had lost their

    asked by Ted
  112. COM/155

    Review pp. 517–520. Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives Just wanted to know if this is correct or do

    asked by BRANDY
  113. Chem

    A sample containing 1.2x10^-2 mol HCl is completely neutralized by 100.0mL of Sr(OH)2 what is the [Sr(OH)2]?

    asked by Anonymous
  114. physics

    A 4.5 kg can of paint is sitting on top of a 0.8 meter high step ladder. How much work did you do to move the can of paint to the top of the ladder?

    asked by Josue
  115. 7th grade

    What are the two vegetation types of Ethiopian Highlands?

    asked by Autumn
  116. Life Sciene

    How would the cell theory be affected if scientists could make living cells from carbon, oxygen, and other elements found on earth.

    asked by Alyssa
  117. math

    If O is 31 degrees and T is 121 degrees then what is the measure of angle A?

    asked by ronnie
  118. Shurley English

    I am having a difficult time classifying this sentence: Did Clint's son change the damaged tire on their car? Please help! Thanks!

    asked by Caroline
  119. other

    A cannon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5 m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?

    asked by katerina C.
  120. Science(Help NOW, Pls)

    how is solar energy used in space and for what purpose?

    asked by GirlSense
  121. Science(Help NOW, Pls)

    wat elements make up water? pls help! i will be very happy if you do! :S

    asked by GirlSense
  122. 3rd grade

    How do you classify this sentence? (Shurley English) Did Clint's son change the damaged tire on their car?

    asked by Caroline
  123. math

    Six people are going to be seted in a row of 8 chairs. How many different ways may they be seated?

    asked by Tom
  124. English

    another word for the word derived. pls help. thank you. :)

    asked by GirlSense
  125. PSY 202

    why is it important to considereach domain in the study of adult development?

    asked by Randy
  126. Calculus

    What's the practical domain and range of this volume function: 4x^3-39x^2+93.5x

    asked by Allie
  127. Science

    What are the bitoic and abiotic factors in a desert ecosystem? How do each of these interact with/affect each other? (be specific and detailed!) Please help me, I will be eternally greatful, haha. :)

    asked by The Official Pancake Queen
  128. physics

    A projectile fired vertically up from a cannon rises 200 m before returning to the ground. If the same cannon were to fire the same projectile at an angle 45 degrees, then the maximum range would be m.

    asked by mc
  129. algebra

    the solutions to the system of equations y= 2x and y =-x + 3 is a)2,1 b)(-1,2) c)2,-1) d)(1,2)

    asked by david
  130. science

    Why is the acceleration the same between a tennis ball and a cannon ball?

    asked by Addison
  131. physics

    The rings of a Saturn-like planet are composed of chunks of ice that orbit the planet. The inner radius of the rings is 78,000 km, while the outer radius is 190,000 km.The mass of this planet is 6.14 * 10^26 kg.

    asked by physss
  132. Finance

    what is the major limitation of the current ratio as a measure of a firm's liquidity? How may this limitation be overcome?

    asked by Sandy
  133. Finance

    What problems may be indicated by an average collection period that is substantially above or below the industry average?

    asked by Sandy
  134. trigonometry

    solve: 2cosx-1=0

    asked by ash
  135. geometry

    Triangle ABC is an isosceles triangle, where angle B is the vertex angle. If BC = 10x-4 , AC= 2x+18 , and AB= 6x+32, find the value of x.

    asked by tim
  136. Math

    A fence is built around 3 sides of a square piece of land. If the fence is 360ft long, what is the area of the land in square yards?

    asked by Anonymous
  137. math

    -z-(z-6)=8 solve the equation

    asked by Daniel
  138. 3rd grade Shurley English

    Please help classify each word in the following sentence: Put some cheese slices and bread on your plate. Thanks!

    asked by Caroline
  139. Algebra 2

    Rewrite the expression in simplest form. (-6x^2) (9x^3) Please help me with this ? Do we multiply ???

    asked by Anonymous
  140. chemistry

    fill in the missing symnbols in the following nuclear bombardment reactions a. 96 4 100 42Mo + 2He = 43 Tc+ ? b. 59 1 56 27Co+ 0n = 25+ ? c. 23 23 1 11Na+ ? = 12Mg+ 0n d. 209 210 1 83Bi+ ? = 84Po+ 0n e. 238 16 1 92U + 8O= ? + 5 0n TEACHER DID NOT EXPLAIN

    asked by coleman
  141. algebra

    the solution to the system of equations y= 2x and y = -x + 3 is a)2,1 b)(-1,2) c)2,-1) d)(1,2)

    asked by david
  142. geometry

    If m

    asked by sharlene
  143. Human Service

    I have tried google, bing, search engines and this is a class question. I need to know the oldest faith based human services and what country they are located. Please some guidence thank you in advance

    asked by Mary
  144. 5th math

    ms. sue please!explain to me one again i'm not getting it yet. 1/4+1/8= ? step by step please!! thank you..

    asked by pat
  145. math

    Solve 9-2(3x+1)>37

    asked by Landon
  146. college maths

    One and one-half cups of native blueberries have 232 calories. How many calories does one cup of native blueberries have? (Points: 5) 233.5 calories per cup 232 calories per cup 154.7 calories per cup 0.006 Calories per cup Not sre how to calclate this one

    asked by lisa
  147. college algebra

    Compute x +y, given the linear system with T # 1 and with the ordered pair (x,y) as solution x + 2y=3 Tx + ( T+1)y = T + 2

    asked by Mark
  148. Language arts

    Figurative language

    asked by Bob
  149. chemistry

    I am doing a boiling point problem and don't know the value of i for the equation delta T = i(kb)(m) solution contains 45.0g caffeine in 25.0 g benzene.

    asked by Tara
  150. chemistry

    what volume of 0.250 M calcium chloride needs to be added to sodium phosphate to produce 35.0 g of calcium phosphate ?

    asked by jenna
  151. Chemistry (URGENT)

    Calculate the molarity of the Co^2+ ion in each of the solutions 1-5. The new molarity is given by the molarity of the stock solution multiplied by the dilution factor. Solution: Co(NO3)2 Original molarity: 0.160 Dilution #1: none D#2: 12mL to 16mL D#3:

    asked by John
  152. math

    A box contains two black balls and three gold balls. Two balls are randomly drawn in succession from the box. a. If there is no replacement, what is the probability that both balls are black? b. If there is replacement before the second draw, what is the

    asked by Jenni
  153. chemistry

    the molar solubility of PbS, in a 0.150 M ammonium sulfide (NH4)2S solution is? The Ksp for PbS= 3.2E-28.

    asked by Tara
  154. English

    1. Keep your fingers crossed. (Why do you use this expression? When we wish somebody good luck, we keep our fingers crossed. Why do we do that? Do you have some reason for that?)

    asked by rfvv
  155. english

    around how many percent of people think they don't need college degree to find a job

    asked by 000
  156. math

    if there were 28 students 2 teachers and 12 invited guests and each pizza can only be divided in ten pieces.how many pizzas will they need to buy to get each person to get three pieces of pizza?

    asked by jacquelin
  157. statistic

    how a t Test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students. Why would this t Test be preferred to using another test statistic?

    asked by smith
  158. math

    How many possible coalitions are there for 24 shareholders?

    asked by Gloria
  159. physics

    ehich of the following is an example of projectile motion?

    asked by cecilia
  160. Chemistry!!

    Determine the pH of 0.100 M aqueous HCN to two decimal places, and determine the concentration of CN- at equlibrium to two singificant figures. Can you show me all the steps to this question? Please and thank you!

    asked by Jenni
  161. english

    I need help really quick unscrambling this word!!! AAAATTTLIIRRONNME Its two words and its the name of a mall. the first words starts with I and the second starts with M.

    asked by nick
  162. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos
  163. 5th

    Explorig adding Fraction. 3/4+1/8=? 1/4+ 1/8= 7/8+3/4= please show me how to do this problem.. thanks! next find the sum of 2/5and5/10.____.

    asked by pat
  164. PSY 202

    Identify the benefits of life experiences for the adult student? Help!!

    asked by Angela
  165. Science(Help NOW, Pls)

    organisms in which domain live in every environment? pls help, im stuck on this one. :S

    asked by GirlSense
  166. Business Math

    Nic has a revolving dept store credit card account with rate 15%annually. Lastmonth balance on the account was $423.78. During the current month, he made purchases totalling $123.42 and made a payment of $100.00. The store uses the unpaid balance method.

    asked by Marcy
  167. physics

    How much paraffin oil would be needed to heat the same volume of water? • Heat capacity of water = 4200 j kg-1 K-1 • Mass of 1 litre of water = 1kg • Heat value of paraffin = 45M J kg-1 • Density of paraffin = 800kg m -3 • 1 cubic centimetre

    asked by Paul
  168. math

    Write the product 35/14 x 3/125 in scientific notation.

    asked by anonymous
  169. Chemistry

    A 10.0 mL sample of 12.1 M hydrochloric acid is added to 90.0 mL of distilled water and added to a sealed 1.04 L reaction vessel containing 1.463 g of calcium hydrogencarbonate at 22.1ºC and 743 mmHg. What is the pressure of carbon dioxide gas?

    asked by Millie
  170. chemistry!

    determine the pH of the following mixture. 50.0 mL of 0.0260 M Benzoic acid and 0.626 g of sodium benzoate (assume the final volume is 50.0 mL) please explain the steps

    asked by Lori
  171. physics

    A projectile fired vertically up from a cannon rises 200 m before returning to the ground. If the same cannon were to fire the same projectile at an angle 45 degrees, then the maximum rangerange would be m.

    asked by mc
  172. Simplify alegebra 2

    -5ã2(4ã2 - 3ã3)

    asked by Gabrielle
  173. math

    Juan says, " when you put togetherunequal groups, you can only add. " is he correct

    asked by ty
  174. algebra

    how would you solve the following by substitution? {4y-5x=9 {x-4y=11 PLZ HELP!!! THNX!

    asked by Crystal
  175. English

    What are some main points of rising action in the Scarlet Ibis?

    asked by Maya
  176. fiance

    How to Establish, Use, and Protect Your Credit located under your Week Four Electronic Reserve Readings. List one way to establish your credit and one way to protect your credit.

    asked by shay
  177. algebra 1

    Find-x when x=- 7/51

    asked by esther
  178. math

    -3.5- 4f=10-2.5f solve the equation

    asked by Daniel
  179. organic chemistry

    What is the {\rm HCl} concentration if 54.2 mL of 0.100 M {\rm NaOH} is required to titrate a 30.0 mL sample of the acid?

    asked by casey
  180. Science(Help NOW, Pls)

    when rock layers are pulled from opposite directions, one block tilts up, while the other block does what? answer pls, need help.

    asked by GirlSense
  181. science

    How many molecules of stearic acid are present in 2.00 mL of a 0.25 mM solution of stearic acid?

    asked by sammy
  182. science

    i am trying to figure out how to describe control and variables for an experiment that stores the energy from light and converts it into motion

    asked by nicolle
  183. math

    Solve 9-2(3x+1)>37

    asked by Landon
  184. Math

    -x^2+4x=-43 I forgot how to do this? Any help would be appreciated.

    asked by Kayla
  185. AP Calculus

    A particle is moving around the unit circle (the circle of radius 1 centered at the origin). At the point (.6, .8) the particle has horizontal velocity dx/dt=3. what is its vertical velocity dy/dt at that point? a)-3.875 b0-3.75 c)-2.25 d03.75 e)3.875

    asked by Jeff
  186. BK

    If the incline is 25 degrees and a box that is resting on the frictionless incline 50 kg, what is the box acceleration

    asked by Lili
  187. chemistry

    for a given reaction, the activation ener

    asked by Tara
  188. grammar

    How does one diagram " He helps build the house" "helps" is not a helping verb, but "build" is not an infinitive, or is it?

    asked by johni
  189. math

    im a fourth grader asking if 13 feet, 6inches is greater than or less than 5 yards. please tell me the correct answer

    asked by faith
  190. English

    It rains cats and dogs. It rains very hard. It rains very heavily. (Are they all the same? Why do we use 'cats and dogs'? Would you let me know the origin of the expression?)

    asked by rfvv
  191. English

    1. The music ________ me sad. had, let, saw, helped, made (Which words can be put in the blank? Is it only 'made'? We can not use the other past tense verbs in the blank in the sentence?)

    asked by rfvv
  192. psy325

    For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3

    asked by smith
  193. Science

    How is solar energy used in space? (for what purpose?)

    asked by The Official Pancake Queen
  194. Chemistry

    The four quantum numbers for the last electron placed in the orbitals of a certain element are: n=3 l=2 m of l=0 and m of s=-1/2. What is the element?

    asked by Brittany
  195. math

    what are all the factors of 30?

    asked by jacquelin
  196. 9th grade

    what is the point called where the lithosphere, hydrosphere and atmosphere overlap?

    asked by tinkerbell
  197. math

    what is the greatest common factor of 6 and 12?

    asked by jacquelin
  198. Science

    Which of earth's layers contains the most mass?

    asked by The Official Pancake Queen
  199. Math

    find the amount of money in a bank account given the following conditions. Initial deposit= $2000, annua rate= 5.5%, time= 4 years?

    asked by Lindsey
  200. Math

    I have two unknown numbers x and y, and the sum of x and y(x+y) is 78 and the product is (x*y) is 896

    asked by Alexander
  201. Math

    Event Probability .37 .18 .13 .32 Dollar Payoff -2 0 6 3 1)Calculate the expected value to two decimal places 2) If the pay off is negative 2 do we win or lose $2?

    asked by Christy
  202. Christmas

    Where can I find accurate information on Christmas?

    asked by Erin
  203. Science(URGENT)

    How is solar energy used in space? (for what purpose?)

    asked by The Official Pancake Queen
  204. Math

    9 1/8 - 2 5/8 can you explain to me how 9 becomes 8 something?

    asked by Alyson
  205. marketing mix

    a firm's marketing mix decision areas would not include: A. Product B. Promotion C. Price D. People

    asked by Anonymous
  206. vocab

    lead:fllow:_________:interest graceful:clumsy:enlivening;___________ happy:glad:confident:____________

    asked by Brakenette
  207. algbra 2

    Rewrite the expression in equivalent simpler form square root 8/9

    asked by Anonymous
  208. calculus

    Find the volume of the solid obtained by rotating the region bounded by the given curves about the line x=-3 y=x^2, x=y^2

    asked by Anonymous
  209. Music

    dose anyone know who influenced black sabbath?

    asked by Courtney
  210. Chemistry!

    Determine the pH of the following, giving your answers to two decimal places. I don't know how to do these problems =( a. 0.100 M ammonia b. 0.11 M oxalic acid. Assume that dissociation resulting from Ka2 is negligible relative to that from Ka1

    asked by Jenni
  211. math

    What is the average of two real numbers is 17.5 and their product is 250

    asked by Anonymous
  212. Chemistry

    Calculate the pH of a solution at the endpoint of a titration involving 25.00 mL of CH3COOH at unknown concentration, and 21.40 mL of 0.100 M NaOH

    asked by Lisa
  213. geometry

    In rectangle ABCD line EF joins the midpoint of line AB and BC. Line BE equals 5, line BF equals 12, find line EF, line AC and perimeter of the rectangle.

    asked by Amie
  214. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos
  215. ALgebra

    x/3x^2 - x-3/3x^2+x-10

    asked by Anonymous
  216. Music

    Did will smith write his own music?

    asked by Sue
  217. social studies

    what is considered alexander the great most lasting achievment?

    asked by alley
  218. English

    Thank you very much for your corrections. Here are some more sentences I'm not sure of. 1) Shopping list: how do you call ten one-litre bottles of sparkling water? a half-a-litre bottle of wine 2) I usually spread nut-cream on a slice of bread for (?)

    asked by Franco
  219. physics

    An electron starts at rest. Gravity accelerates the electron in the negative y direction at 9.80 m/s2 while an electric field accelerates it in the positive x direction at 3.80×106 m/s2. Find its velocity 2.45 s after it starts to move.

    asked by sue
  220. math

    forty-nine days is how many weeks? what are the factors of 12? forty books were put into eight equal stacks how many books were in each stck? how many years are in five centuries? what is the seventh mutiple of 6 then subtract 12 what is the differcecne?

    asked by jojo
  221. geometry

    Write and solve an inequality to find the calues of x for which the area of the rectangle is greater than the are of the triangle

    asked by Bob
  222. algebra

    Factor x2 - 100

    asked by julia
  223. maths

    how do i make d the subject? L=4pisignCd^

    asked by joleen
  224. History Help Please!!!

    Can you tie in a leaked U.S. document that referred to particular countries called the "Axis of Mischief" according to the Bolivarian Alternative for the Nations of Our America?

    asked by Sam
  225. Calculus

    Find the volume of the solid obtained by rotating the region bounded by the curves about the line x=-3, y=x^2, x=y^2. I keep getting the wrong answer!! Please hellpp!! =(

    asked by Anonymous
  226. science

    in the digstive system,what is the defenition or function of th Appendix?

    asked by sofia
  227. science

    what is the reason why we can get Appendicittis even if we don't know what is the function of the appendix?

    asked by sofia
  228. bio

    what is the sociobiology controbersy?

    asked by Allie
  229. social studies/writing

    we have i pproject and i need to find some information on washhiington d.c. i need to find a hisstoric place in washington d.c that starts a d-z. (i am still working on them.)

    asked by April
  230. math

    what percent of 60 is 57

    asked by blask
  231. college

    The average and SD of a set of 50 scores are 30 and 7, respectively. If each of these scores is increased by 10, then which of the following is true for the new set of scores?

    asked by Anonymous
  232. calculus

    Let R be the region in the first quadrant bounded by the graphs of y=e^-x, y=1/2x+1, and x=2. Then find the volume of the solid when R is revolved about each of the following lines... the x axis, y=-1, y=2, the y axis, x=-1, and x=3.

    asked by Drew
  233. bio

    What is the grandmother effect in humans? what is the grandfather effect?

    asked by Allie
  234. chemistry

    Explain in a written statement how you would make 200.0 mL of a [Cl-] = 0.172 M solution starting with CaCl2

    asked by gordon
  235. algebra

    simplify (x+3)^2= 19

    asked by Anonymous
  236. geometry

    what are the symmetry properties of a regular octahedron and a cube?

    asked by m
  237. Math

    Solve for y. 12y+11=-32y

    asked by anonymous
  238. algebra

    explain this expression to an equivalent standard form quadratic expression (x+5)(4x-3)

    asked by Anonymous
  239. Finance

    What problems may be indicated by an inventory turnover ratio that is substantially above or below the industry average?

    asked by Sandy
  240. grammar

    What is the verb and helping verb of this sentence. Mary was studying for the test.

    asked by Jennifer
  241. Finance

    What factors limit the use of the fixed-asset turnover ratio in comparative analyses?

    asked by Sandy
  242. calculus

    Find the dimensions of a right circular cone, that holds one liter and is made with a minimum amount of sheet metal. It is open on the top.

    asked by Lin
  243. Finance

    Market Size for software (Google) •Identify/profile the customer you cater to. •Calculate the TAM (top down), SAM (bottoms up) and SOM.

    asked by CT
  244. english

    I have to write an expository essay on Second Hand Lions. How would i do that?

    asked by kay
  245. spanish

    need pictures about story on fian arroyo

    asked by m0nique
  246. physics

    A cannon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5 m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?

    asked by matt chirl
  247. physics

    An electron starts at rest. Gravity accelerates the electron in the negative y direction at 9.80 m/s2 while an electric field accelerates it in the positive x direction at 3.80×106 m/s2. Find its velocity 2.45 s after it starts to move.

    asked by sue
  248. exams

    is there a good breakfast to eat before exams? like, is there a special food like fiber which would help me stay alert and ready?

    asked by Gabby
  249. science

    Using the formula for the speed of a shallow-water wave, C = square root (g x d), what is the speed of a wave when d = 10 meters. The value of g = 10 m/s2.

    asked by paula
  250. math

    My friends & I have posted this question before but are still confused on the answer. We know the equation but the calculator part is confusing so If anyone who answers this could give an exact answer to 6 decimal places that would be great. Then we can go

    asked by Friends
  251. People

    The last question for my survey: A girl and a boy love each other a lot. They always text each other: "I Love You" and stuff. The girl never has the guts to say "I Love You" to the boy in reality. What can she do to fix this? This is my last survey

    asked by Dream Gurly
  252. infinitives

    Jim had no choice except to resign from the position. to resign - infinitive used as an adverb?

    asked by michael
  253. geography

    Taken as a whole, what would you say is the single most pressing problem found in Latin America or South America? What possible solutions can you develop?

    asked by kaitlyn
  254. PSY 202

    How can adults reject negative influences and benefit from positive ones in their current life?

    asked by Angela
  255. chemistry

    using a universal ph paper to test the Ph of purple grape juice is unlikely to be successful why

    asked by dylan
  256. Mathematics

    What is the slope of the line described by the equation 1 _____________________________-x+-y=5___ ________________________________3______ i hope someone understands this problem

    asked by Kendra
  257. maths

    how arithmetic and geometric progression can be used to solve problems related to banking business?

    asked by kulwa
  258. calculus

    There is a right triangle with x and y legs labeled B and A, respectively. B is increasing at a rate of 1 m/s and A is decreasing at a rate of 2 m/s. At what rate is the angle theta (located on the leg B) changing when A is 10m and B is 20m?

    asked by Nimra
  259. global

    Does cultural diffusion unite or divide our world today?

    asked by Anonymous
  260. Mathematics

    If a pentagon is dialated which of the folloeing characteristics change? 1.side lenght 2.area 3.the coordinates i think tis 2 & 3 but not sure.

    asked by Kendra
  261. Algebra 1

    What are three ordered pairs that are a soultion to the equation 3x-1=-2?

    asked by LE
  262. chemistry

    my moth balls froze at 54 degrees celsius, what kind are they?

    asked by Ali
  263. french

    How would you say it would be necessary using the verb falloir?

    asked by peter
  264. history

    Identify and define the two other items (in addition to supply-side economics) that were a part of Reagan’s economic agenda.

    asked by pam
  265. Intermediate Algebra

    I have a 72% in this class, but I think I made an F on my final, what is my final grade? please help me!!!

    asked by lacey
  266. algebra

    y = 1/2 x -3. what is the slope? a)-3 b)3 c)1 d)1/2

    asked by rusty
  267. math

    if (2+2i)squared= a+bi, compute the value of a+b.

    asked by Yolonda
  268. Algebra

    Make d the subject L=4ðCx(x is set off the line)d^2

    asked by joleen
  269. infinitives

    Adena wants Sam to learn to change a tire. to learn -infinitive used as adj. to change - infinitive used as an adverb?

    asked by michael
  270. MATH

    simplify |-7+2|-|-4|

    asked by RICH
  271. algebra

    parallel lines never meet because they are a) far apart b)equidistant c)horizontal d)vertical

    asked by rusty
  272. French

    Please check if this is right: Demain matin, je vais aller à la ferme. Je n’ai jamais visité une ferme avant. D’abord, je vais faire une randonnée à pied. Ensuite, je vais voir: un cochon, un lapin, un cheval, une vache, un ècureuil, et un oiseau,

    asked by Gabby
  273. algebra

    corresponding sides mean: a)the measures are equal b)the side is in a similar location c)the sides are opposite d)one side is shorter than the other

    asked by rusty
  274. infinitives

    It was too late for Sam to register for the course. to register - infinitive is it used as a noun b/c it comes after for Sam?

    asked by michael
  275. History

    Explain “supply-side” economics or “Reaganomics.

    asked by Anonymous
  276. Toms River

    If you have 23 kids in a class how many of them are 5ft 2ins or taller? And how many are shorter?

    asked by Ashley
  277. physics

    How to do worksheet on projectiles and horizontally

    asked by Anonymous
  278. geometry

    What is the distance from the origin to the point (14,11)?

    asked by Ashley
  279. math

    when you put something in parenthesis like C(25,8) what does that mean or how do you solve it?

    asked by David
  280. 4th grade

    Nick had 1 3/4 gallon of milk. How many pints of milk does Nick have.

    asked by David
  281. Math

    9 - 4 3/7

    asked by Alyson
  282. fractions- 3rd grade

    Name 2 fractions that are equivalent to 3 4th

    asked by Eddie
  283. Math

    10 - 5 4/11

    asked by Alyson
  284. BIO

    How are enzymes able to speed up chemical reactions? Be sure to include examples,

    asked by luly