Questions Asked on
October 31, 2010

  1. psychology

    In an experiment, a control group is different from an experimental group in that the people in the control group: are not exposed to the same treatment of the independent variable. differ in trait variables. do not incur the same exposure to the dependent

    asked by cindy
  2. Algebra 1

    If Soybean is 12% protein and Corn is 6% protein. How much of both will equal 240lbs that is 10% protein?

    asked by Tasha
  3. psychology

    People in the grocery store are asked to do a taste test of a new soft drink product. Two paper cups are given to each person who volunteers. Fifty percent of the participants are given two different soft drinks. The other half receive the same product,

    asked by cindy
  4. chemistry

    How many moles of electron are transferred per mole of this reaction? 6Li + N2-> @Li3N

    asked by Anonymous
  5. psychology

    An experimenter is studying how time spent on a cell phone affects people's ability to drive safely. Driving the car is the: dependent variable. coefficient of correlation. independent variable. operational condition. Im between C and D. Leaning toward C.

    asked by john
  6. chem

    What is the pH of 0.2 M HN3?

    asked by d
  7. psychology

    Random assignment can be described as a research method: used to balance the independent and dependent variables. no longer used because of its unpredictability. increasing the likelihood that the experimental group and control group will be different.

    asked by cindy
  8. Chemistry

    A quick question. When we use the bond energies to find delta H, should we use the sum of the bond energies of the reactants minus the sum of the bond energies of the products, or vice versa? For example, H2 + Br2 --> 2HBr Given that H-H bond is 436 KJ/mol

    asked by Steven B.
  9. chem

    Can I2 oxidize metallic aluminum? Show the balanced chemical equation and the Eo values.

    asked by m
  10. Chemistry

    Can someone arrange for the strengths of the bonds below for me please? lone pair, single bond, double bond, triple bond Thanks

    asked by Steven B.
  11. Health Management

    What steps would you use to correct the problems of incomplete health records and deliquent health records?

    asked by Johnnie
  12. english

    Is this correct? Eating two cups of ice-cream every night is my habit because it has sweet and delicious taste, which always makes me feel hyper and pleased and recalls my happy moments in the past, such as party at the beach and my 18th birthday party.

    asked by kelly
  13. physics

    A 4kg box starts up a 30 degree incline with 128J of kinetic energy. How far will it slide up the plane if the co-efficient of friction is 0.3?

    asked by manu
  14. English

    need help with ????? PLEASE What is the role of education in successful financial planing???/ don't no what my teacher means and it needs to be in five sentences???????????????/

    asked by Gozony
  15. physics

    A box of mass 10kg starts from rest and slide down a plane angled at 45 degrees to the horizontal. the box slides 2m down the plane before it encounters a spring with constant k=500 N/m which causes it to come to rest. What will the maximum compression of

    asked by manu
  16. Finance

    Cascade Mining Company expects its earnings and dividends to increase by 7% per year over the next six years and then to remain relatively constant thereafter.

    asked by Deb
  17. Programming

    This is a problem with mathmatics. the Question is: Federal law requires hourly employees be paid "time-and-a-half" for work in excess of 40 hours in a week. For example, if a person's hourly wage is $8 and he works 60 hours in a week, his gross pay should

    asked by Lee
  18. AP calculus

    Find (dy/dx) for the following implicitly defined function: 2x = 3siny - 2y

    asked by cel
  19. accounting

    From the following transactions, state which account will be debited and which account will be credited by filling up the appropriate boxes. S.No. Transactions Accounts involved Application Reason with respect to Rules of Debit and Credit Sample Example

    asked by Anonymous
  20. AP Calculus

    Find (dy/dx) for the following implicitly defined function: cos(x-2y) = 3y for the answer, i got.. dy/dx = (-sin(x-2y)) / (3-2sin(x-2y)) but i'm not sure if it's right..

    asked by cel
  21. Physics-work,power,energy

    A 20 ton truck is pulling a 5 ton trailer.their common uniform velocity is 54 kmph.if the frictional force is 20N per both the truck and the trailer then power developed is?

    asked by Raj
  22. Calculus

    Find the second derivative of the following function: y=log(base2)x/x² y'=[(x/ln2)-2xlog(base2)x]/x^4 the derivative of x/ln2 is (ln2)^-1? y"={[((ln2)^(-1))-(2log(base2)x/xln2)]x^4-4x³[(x/ln2)-2xlog(base2)x]}/x^8 I tried simplifying it and I got,

    asked by sh
  23. Statisitcs

    Scores on the verbal section of the SAT have a mean of 500 and a standard deviation of 100. If someone scored at the 90th percentile, what is their SAT score?

    asked by Johnny
  24. anatomy and physiology

    why do slow fibers fatique more slowly than fast fibers.

    asked by rally
  25. AP

    what would happen in tems of muscle contraction if calcium channels were not able to open or close.

    asked by rally
  26. physics

    A 94- astronaut and a 1200- satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.25 directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the

    asked by pedro
  27. math

    (5)/(x) - (2)/(x-3) = 0 5(x-3) - 2(x) = x(x-3) 5x-15-2x = x^2 -3x 3x-15 = x^2 -3x this is where i get stuck please help thanks

    asked by peter
  28. anatomy and physiology

    Bone mineral density scans are required to detect early signs of osteoporosis because normal x-rays don't detect it until what percent of bone density is gone?

    asked by Stacie
  29. physics

    physics behind fibre optics

    asked by g
  30. Physics

    A particle of mass 2.7kg has an initial velocity of 5i+5j m/s. It is acted on by a force 2i-4.5j N for 2s. What is its final velocity?

    asked by applebottom
  31. Fluid Mechanics

    A circular disc having a diameter of 125cm is immersed in water so that the distance of its perimeter measured vertically below the water surface varies between 60cm and 150cm. Find the total force due to the water acting on one side of the lamina, and the

    asked by Claire
  32. Math

    I have a couple questions about the sums of geometric series. One. So the formula for the sum is t(n)=t(1)[(r^n)-1] But if my series starts at t(0), can I change the formula to t(n)=t(0)[(r^n)-1] ? Two. If, in the series, there is a different pattern in

    asked by Anonymous
  33. basic math

    Identify the rate in the following statement:27% of 500 is 135.

    asked by heather
  34. Physics

    A 55 kg person stands on a scale in an elevator that accelerates downward at 3 m/s2. a) What is the scale reading? N b) What is the person's weight? N

    asked by applebottom
  35. ALgebra

    the difference between two numbers is 7. there sum is 25. find the numbers

    asked by mike
  36. budget and forecasting

    Using the table “Gasoline Sales Time Series”, calculate the forecast for gasoline sales (in thousands) for Week 13 using a three day moving average. Gasoline Sales Time Series Week Sales (000’s of gallons) 1 17 2 21 3 19 4 23 5 18 6 16 7 20 8 18 9 22

    asked by tracey
  37. chemistry

    how many moles of Cu are there in the sample of CuO if sample weighting 0.5424g contains 0.4831g Cu

    asked by Anonymous
  38. math

    find the measure of each angle (x+17)degrees and x degrees. This is a right angle, not sure how to set up this problem.

    asked by gmoney
  39. Physics

    Dumping sealed containers from ship decks that are 2 meters above the water surface. With a final depth of 100 meters. Find the final velocity of the container on impact. 1. Container in the shape of right circular cylinders, containers of .5 meters

    asked by Christopher
  40. 8th grade

    I need a topic for a non fiction paper

    asked by cody
  41. Math

    If the sides of a square are lengthened by 7cm, the area becomes 121cm2. Find the length of a side of the original square.

    asked by Justin
  42. math

    how long was the dolphin show? the number of minutes is between 40 and 60. the tens digit is one less than the ones digit. the number has 4 tens. what is the answer

    asked by me
  43. math

    can a right triangle be a scalene triangle?

    asked by gmoney
  44. biology

    i am doing a science project and needmeasurements for organs in the respiratory and excretory systems

    asked by sarah
  45. math

    find the area of a square, that measures 1.2 cm by 1.2 cm?

    asked by gmoney
  46. criminal Justice

    Write a 700 to 1000 word paper in which you explain comonents of the criminal justice system and the criminal justice process. In your paper, be sure to include the definition of crime, it's relationship to the law, and the government structure as it

    asked by Maria Suter
  47. social studies

    Is the U.S. today a melting pot or a mosaic, explain?

    asked by Tony
  48. crt/205

    I have trouble with labeling these statements if someone can help I would appreciate it. I need to know if the labeling is correct if not what is the correct labeling. I believe these are ambiguous or vague statements-1. federal reserve looking to spend

    asked by sheila
  49. child care

    books that promote tolerance include

    asked by sara
  50. Fluid Mechanics

    A closed tank, rectangular in plan with vertical sides, is 1.8m deep and contains water to a depth of 1.2m. The enclosed space above the water is pressurized with air up to 35kPa. If the length of one wall of the tank is 3m, determine the resultant force

    asked by Claire
  51. childcare

    to say that all african-americans are fast runners is an example of

    asked by sara
  52. social studies

    what did officials say about the tiananmen square accident?

    asked by hunter
  53. Social Studies

    name if the following involve, seperation in powers, checks and balances, judicial review, federalism, or some combination of these principles, and say why A) the state law requires that a prayer be said each day in public schools. The courts rule that law

    asked by J
  54. Calc

    At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)?

    asked by Bill
  55. Social Studies

    someone already posted something similar to mine but i think they're in my class and we have way different problems to work on... name if the following involve, seperation in powers, checks and balances, judicial review, federalism, or some combination of

    asked by Spencer
  56. ALgebra

    the difference between two numbers is 7. the larger number is 9 less than 3 times the smaller. find the numbers

    asked by mike
  57. Economics

    I need 3 reasons for the following questions: 1. how is comparative advantage shifting in car prodcuton? 2. Does France still have a comparative advantage in fine wines? Why?

    asked by Anique
  58. science

    i really need measurements for the pharunx larynx trachea and theinferior vena cava and abdomonial aorta

    asked by sarah
  59. chemistry- thank you

    What is the maximum weight (in grams) that 15 party balloons, each filled with 2 L of helium, can lift at STP? You can assume the weight of the balloon rubber is negligible and the outside air can be treated as pure nitrogen.

    asked by Anthony
  60. Chemistery

    How much heat is contained in 4 liter of liquid methanol (CH3OH) when it is completely combusted (excess oxygen) to form carbon dioxide and water. the density of metanol is 0.7918 g/ml. (CH3OH = -638)

    asked by Laura
  61. calculus

    Following sequence is given. A_(n+1)=sqrt(b*a_n+c) a_1=a a,b,c>0 How do you prove it is bounded and convergent?

    asked by svetlana
  62. Java Programming

    I'm a beginner to Java and I need to know how to do the following: Write a program that will ask the user to enter the amount of a purchase. The program should then compute the state and county sales tax. Assume the state sales tax is 4 percent and the

    asked by P
  63. Physics

    a 10 kg ball moving due west at 2m/sec collides with a 4kg ball that is moving due east at 3 m/sec. You determine that immediately after the collision the 10 kg ball is moving due west at 0.57 m/sec. A) this probably IS a Totally inelastic collision B)

    asked by Christina
  64. calculus

    Let A be the bounded region enclosed by the graphs of f(x) = x , g(x) = x3 . Find the volume of the solid obtained by rotating the region A about the line x + 2 = 0.

    asked by me
  65. History

    Write a well-organized essay that explains how the Americans won the Revolutionary War. Your essay should include at least four paragraphs. Remember that you will be graded on content, organization, and mechanics (grammar, punctuation, spelling, and

    asked by Amby
  66. calculus

    Following sequence is given. A_(n+1)=sqrt(b*a_n+c) a_1=a a,b,c>0 How do you prove it is bounded and convergent?

    asked by svetlana
  67. chemistry-check answer

    What is the wavelength (in nanometers) of light emitted from a hydrogen atom when an electron falls from the n = 2 to n = 1 orbital? I got this answer and i wanted to make sure it is right 121.7 Thank you

    asked by Anthony
  68. geometry

    There is a triangle. The size of the angles, in degrees are 3x 2x x+30 What is the value of x. THANKS....

    asked by Obaid
  69. chemistry

    what the equation of:Br gain 2 electron

    asked by jonf
  70. chemistry

    What is the wavelength of radiation that has a frequency of 6.912 × 10^14 s−1? and does the s-1 make a difference? Thank you!

    asked by Jazmin
  71. Chemisty

    A 5M solution is diluted 1/10 and again 1/5. What is the concentration of each dilution?

    asked by T
  72. English

    Write an essay on university education in a paragraph.

    asked by Belinda
  73. physics

    A 8.5 kg block intially at rest is pulled to the rightr along a horizontal, frictionless surface by a constant horizontal force of 15.6 Newtons. Find the speed of the block after 2.8 meter

    asked by Sarh
  74. geography

    Where can i find an article that deals with culture in latin america. The article can't be more than two years old.

    asked by alainia
  75. english

    what does pluralism mean in a familial sense?

    asked by Rocio
  76. science

    39 ml of a gas is at 0 celsius. What is the new temperature if the volume is decreased to 35 ml?

    asked by meg
  77. English/social studies

    help me make a poem with this: It is the Chinese New Year tradition that every family gives its house a thorough cleaning, hoping to sweep away all the ill-fortune there may have been in the family to make way for the wishful in-coming good luck. People

    asked by christian
  78. healthcare

    what is ethical issues and the asministrative process?

    asked by bobra
  79. college

    How will ethical issues alter your way of conducting change in the organization?

    asked by Danelia
  80. Physics(checking answer)

    Two 3.0g bullets are fired with speeds of 40.0 m/s and 80.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of their kinetic energies? I got 60 for the first bullet and 120 for the second. I am not

    asked by Cory
  81. physics

    The three ropes shown are tied to a small, very light ring that is stationary. Two of these ropes are anchored to walls at right angles with the tensions shown in the figure. What is the magnitude of the tension T3 in the third rope, if T1 = 48.8 N, T2 =

    asked by Jay- just need help!
  82. Social Studies

    How each of the eight strands of soical studies ties into the life and times of christopher Columbus?

    asked by Ariel
  83. math

    if a circle has an area 2500 times pi what is the circumference? Please show work.

    asked by gmoney
  84. Chemistry

    A 2.50 gram sample of bronze was dissolved in sulfuric acid. The copper in the sample reacted with sulfuric acid to form copper sulfate. Cu (s) +2 H2SO4 (aq) -> CuSO4 (aq) +2 H2O (l) The copper sulfate formed in this reaction was mixed with I to form

    asked by Dave
  85. Algebra 2

    How do you solve 7- ³√9c = 4?

    asked by timmy123
  86. Algebra 2

    When you solve (√3n+10) - 4 = n, are the solutions n=-3 and n=-2. You don't have to reject any solutions, right?

    asked by timmy123
  87. math

    What is one fourth of a number is less than ten a mathamatical sentence

    asked by tahj
  88. Math

    Find the horizontal asymptote, if any, of the graph of the given function. g(x) = 4x^5+9x^4+1/9x^5+3x^4-9x^2+3x+1

    asked by Anonymous
  89. Chemistry

    Quantitative anaylsis of cl- ion is often performed by a titration with silver nitrate, using sodium chromate as an indicator. As standardized AgNo3 is addded, both white AgCl and red Ag2CrO4 precipitate, but so long as some cl- remains, the Ag2CrO4

    asked by MEG
  90. physics

    A grinding wheel 0.40 m in diameter rotates at 2200 rpm. What is the acceleration of a point on the edge of the grinding wheel?

    asked by Eden
  91. Ethics

    o The Ethical issues considered important in today’s health care organization • how will ethical issues alter your way of conducting change in the organization? O The impact of financial and human resource management. • How will

    asked by HELLLLLPPPPPP
  92. physics

    A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

    asked by Eden
  93. Math

    Analyze the function algebraically. List its vertical asymptotes, holes, y-intercept, and horizontal asymptote, if any. q(x)= -4/x-2 vertical asymptote= hole= horizontal asymptote= y-intercept=

    asked by Anonymous
  94. College Physics

    A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the

    asked by Scott
  95. Algebra 2

    What is the conjugate of (2√5 + 3√2)/2? How do you find it?

    asked by timmy123
  96. math

    find the area of rectangle with base of 2cm and height of 4cm

    asked by gmoney
  97. Algebra 2

    How do you solve x + x + x√2=10? I did x^2 + x^2 + 2x^2 = 100 4x^2 = 100 How do I continue?

    asked by timmy123
  98. algebra

    2(x-3)-17=13-3(x+2)

    asked by brenda
  99. Calc

    At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)? Not a

    asked by Bill
  100. Maths

    What angle does the middle turn through if it's turns clockwise from facing east to facing south ?

    asked by Sarah
  101. algebra

    the larer of two numbers is 23. if three times the larger is 5 more than eight times the smaller ,find the smaller number

    asked by jaki
  102. Chemistry

    What is the total kinetic energy of 1.70 moles of N2 at 30.0 celsius? What formula do I use?

    asked by mia
  103. Math

    1. Determine the vertex of the parabola: y= 7x^2+14x+6 2. For the following 2 functions,identify the horizontal and vertical asymptotes. a)f(x)= 3x(x-2)/x(x-1) b)g(x)= x/(x+7)^2

    asked by Jimmy
  104. Maths- Discriminants

    Find the values of k for which the following equations have 2 distinct roots. a)kx^2+kx+2=0 b)kx^2+3k+k=0 c)x^2-2kx+4=0 Im stumped please show working so i can see what needs to be done

    asked by Anonymous
  105. algebra

    if for times catherines age is sabtracted from 5 times joses age the difference is 32 years jose is sixteen find catherines age

    asked by miriam
  106. algebra

    2(2-x)

    asked by arturo
  107. math

    Solve. 9-9x/4x+8 multiplied by 2x+4/3x+3

    asked by MARIAH
  108. algebra

    5x+4

    asked by osmar
  109. stats

    Between 11 P.M. and midnight on Thursday night, Mystery Pizza gets an average of 5.7 telephone orders per hour. a) Find the probability that at least 32 minutes will elapse before the next telephone order. b) Find the probability that less than 17 minutes

    asked by anonymous
  110. Managerial Econmics

    Suppose you own a home remodeling company. You are currently earning short- run profits. The home remodeling industry is an increasing- cost industry. In the long run, what do you expect will happen to … a. …your firm’s costs of production? Explain.

    asked by Roger
  111. Managerial Economics

    Antitrust authorities at the Federal Trade Commission are reviewing your company’s recent merger with a rival firm. The FTC is concerned that the merger of two rival firms in the same market will increase market power. A hearing is scheduled for your

    asked by Roger
  112. Chemistry

    How do you calculate the number of g of solute that would be needed to make the following? 2.50X10^2mL of 0.100M NaCl?

    asked by Fran
  113. Managerial Economics

    When McDonald’s Corp. reduced the price of its Big Mac by 75 percent if customers also purchased french fries and a soft drink, The Wall Street Journal reported that the company was hoping the novel promotion would revive its U. S. sales growth. It

    asked by Roger
  114. physics

    The centers of a 6.0 lead ball and a 70 lead ball are separated by 8.0 . What gravitational force does each exert on the other? What is the ratio of this gravitational force to the weight of the 70 ball?

    asked by ellen
  115. Maths

    Omar is in the middle... Tom is standing on the east side... Emma is standing on the south side... What angle does omar turn if he turns clockwise from facing tom to facing emma?

    asked by Sarah
  116. algebra

    are the following lines parallel, perpendicular or neither 4x+5y=7 5x+4y=10

    asked by meg
  117. physics

    The three ropes shown are tied to a small, very light ring that is stationary. Two of these ropes are anchored to walls at right angles with the tensions shown in the figure. What is the magnitude of the tension T3 in the third rope, if T1 = 48.8 N, T2 =

    asked by Jay- just need help!
  118. english

    Which group of words in the sentence is misplaced? Having been discovered, Rover looked up at his owner with puppy-dog eyes. a. with puppy-dog eyes b. been discovered c. his owner d. Rover looked up

    asked by Karen
  119. 2nd grade,science

    list four things all living things do

    asked by omar
  120. chemistry- thank you

    How many valence shell electrons are there in a ground state silicon atom? Am i suppose to just count the electrons after the core electrons?

    asked by Jazmin
  121. math

    the length of a rectangle is 7 times as long as its width. if the perimeter is 72 meters what is the length and width of the rectangle? please show how to set up eqaution.

    asked by gmoney
  122. Chemistry

    Calculate the enthalpy change in kJ when 21.6g of H2S is burned. 2H2S(g) + 3O2(g) --> 2SO2(g) + 2H20(g) Change in H=-1036kJ/mol

    asked by Tiffany
  123. accounting

    A company purchased 1000 units of inventory on September 25 and the cost per unit was $8.50. Terms of the purchase were 2/10, n/30. The invoice was paid in full on October 4. (Assume a perpetual inventory system). Prepare the journal entries to fully

    asked by Jo
  124. algebra

    are the following lines parallel, perpendicular or neither 4x+5y=7 5x+4y=10

    asked by meg
  125. accounting

    A company that uses perpetual inventory system made the following cash purchases and sales: January 1 Purchased 100 units at $10 per unit. February 5: Purchased 60 units at $12 per unit. March 16: Sold 40 units for $16 per unit. Prepare general journal

    asked by Jo
  126. calculus

    find the inverse of q(x)=(x-5)^2

    asked by Nick
  127. calculus

    find the inverse of q(x)=(x-5)^2

    asked by Nick
  128. Chem

    Acetic acid (CH3COOH) reacts with isopentyl alcohol (C5H12O) to form isopentyl acetate (C7H14O2), a fragrant substance with the odor of bananas. CH3COOH + C5H12O -> C7H14O2 + H2O If the yield for the reaction is 45%, how many grams of the product are

    asked by Dave
  129. geometry

    explain the importance of a centroid in design and manufacturing.include a description of how the cenroid of a triangular component of a design can be found using analytic geometry

    asked by crystal
  130. Chemistry

    A 500.0-mL buffer solution is 0.100 M in HNO2 and 0.150 M in KNO2. Determine whether or not each of the following additions would exceed the capacity of the buffer to neutralize it. a. 250 mg NaOH b. 350 mg KOH c. 1.25 g HBr d. 1.35 g HI Can you explain to

    asked by Johannie
  131. Chemistry

    When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 40L of water for your group. What volume of fuel should you bring? Assume each of the

    asked by Anonymous
  132. English

    Are multi-ethnic families shown to be “successful” (not in an economic sense, but in a familial sense)?

    asked by Catherine
  133. algebra

    what is 7-9x=52

    asked by Anonymous
  134. biology

    Where would you be most likely to find a phenylalanine side chain?

    asked by Anonymous
  135. Math

    How do you solve: (-2t)^2(3t^7)^2

    asked by Justin
  136. algebra

    could someone check these answer please? solve the following proportion for x. x/8=5/3=0 rueben drove 300 miles using 14 gallons of gas, at this rate, how many gallons would he need to drive 210?= 40.3 gallons solve for v; v^2+v-30=0=v=-6,5 thanks

    asked by lee
  137. physics PLEASE HELP

    how do you rearrange this equation weight=T1sin57+[T1cos57/cos23.5]xsin23.5 when you're trying to isolate T1?????

    asked by Jay- just need help!
  138. Physics

    How many electrons in an atom can have each of the following quantum number or sublevel designations? 1. n=4, l=3

    asked by Arian
  139. physics

    You are on a diving board and jump up with a velocity of 4.2 m/s. After 1.5 s you land in the water. Assuming a acceleration of -10 m/s and neglecting air resistance: a) What is your impact velocity? b) How high is the diving platform?

    asked by qw
  140. chem

    Can I2 oxidize metallic aluminum? Show the balanced chemical equation and the Eo values.

    asked by m
  141. Physics( Checking answer)

    Sorry for re-posting but I really need to know if I did it right. Please someone help! Two 3.0g bullets are fired with speeds of 40.0 m/s and 80.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of

    asked by Cory
  142. Chemistry

    In a gas expansion, 69 J of heat is absorbed from the surroundings, and the energy of the system decreased by 118 J. Calculate the work done. _______ J

    asked by Rose
  143. Chemistry

    Predict whether or not a precipitate will form upon mixing 75.0 mL of a NaOH solution with pOH = 2.58 with 125.0 mL of a 0.018 M MgCl2 solution. Identify the precipitate, if any. Express as a chemical rxn NaOH(aq) + MgCl2(aq) => NaCl(s) + MgOH(aq) I have

    asked by Anonymous
  144. Chemistry

    Which gas will be made when Mg, Al, or S reacts with HCl?

    asked by Ari
  145. physics

    Calculate the mass of the Earth, if it had a radius of 3000 km and a gravity of 6 m/s^2.

    asked by Eileen
  146. physics

    A car travels 12 km due north and then 26.2 in a direction 0/( that is supposed to be a circle with a line through it)67.3 west of north. Find the magnitude of the cars resultant displacement

    asked by Alex
  147. math

    is these answers correct? solve the equation: 2x^2 +8x - 17=(x +2)^2= x=-7,3 solve (v-5)^2-63=0, where v is a real number, simplify answer as much as possible. v=3 square root 7+5,-3 square root7+5 v``12.93725, -2.937254 use the quadratic formula to solve

    asked by lee
  148. 4th grade-Science

    If you throw a soccer ball, a football, and a golf ball with the same force, which one has the greatest acceleration and WHY?

    asked by Hunter Nobis
  149. Chemistry

    In lab we did thermochemistry, where we are supposed to find the heats of solution, heat change of calorimeter and molar heat solution of the salt. I calculated that the calorimeter constant for the water we had was 883.194 Joules. We took 1/10 of a mole

    asked by Rani
  150. business

    What are the potential costs of adopting a free trade regime? Do you think government should do anything to reduce these costs?

    asked by cassandra
  151. general question

    is there way i can get my questions answered privately?

    asked by Anonymous
  152. english

    This what I wrote about the word "ABuse" and its history. Please tell me if I am definding the word correctly with examples and if my sentences are structured. Your help is apprected. To certain people the word abuse has many meanings; thus the word abuse

    asked by Jessica
  153. history

    how does the geography of an area affect the type of work that the people in that area do ?

    asked by porto
  154. Chemistry HELP!!!!

    Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) ¨ 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the

    asked by mia
  155. physics:energy

    A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power? I tried using 1/2mv^2 and it

    asked by Ashley
  156. logic

    Sometimes people get caught in a “downward spiral,” a case in which something leads to a result which in turn leads to more of the original thing, bringing on more of the result. As the process continues, the result continually gets worse and worse. An

    asked by kim
  157. chemistry

    The rate of effusion of a particular gas was measured and found to be 25.0 mL/min. Under the same conditions, the rate of effusion of pure methane (CH4) gas is 46.4 mL/min. What is the molar mass of the unknown gas?

    asked by Mattie
  158. Physics

    A bicyclist on an old bike (combined mass: 96 kg) is rolling down (no pedaling or braking) a hill of height 103 m. Over the course of the 278 meters of downhill road, she encounters a constant friction force of 323 Newton. If her speed at the top of the

    asked by Layla
  159. Physics

    A car (mass 980 kg) drives up a hill (height 335 m) in 146 seconds. At the bottom of the hill, it has a speed of 23 m/s, but at the top, it has slowed down to 11 m/s. Neglecting friction, what is the average engine power?

    asked by Layla
  160. physics

    A car engine has 90 kW and an efficiency of 12 percent. Let's assume a simple model of air friction, Fair=Kv2 , with K=027kgm for this car. If there is no other friction, and no winds, what is the maximum speed it can reach?

    asked by Layla
  161. physics

    Which object would have a higher inertia a rock that has a mass of 20 kg or a hollow ball that has a mass of 22 kg?

    asked by maria
  162. ethics

    How would a utilitarian approach cause someone to make a different decision in certain cases. Can you think of cases in which a decision made would be different based on the ethical approach a person takes?

    asked by Anonymous
  163. Chemistry

    Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the following reaction. CH4(g) + NH3(g) → HCN(g) + 3 H2(g) What is the heat of reaction at constant pressure? Use the following thermochemical equations. N2(g) + 3 H2(g) → 2

    asked by Emily
  164. 11th grade

    x+y>1

    asked by micaiah
  165. Physics

    A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

    asked by Corey
  166. physics

    A grinding wheel 0.40 m in diameter rotates at 2200 rpm. What is the acceleration of a point on the edge of the grinding wheel?

    asked by Corey
  167. calculus

    Use the function defined below to find an equation of the tangent line at the point indicated. y = cos(x), x = π/3

    asked by Anonymous
  168. physics

    you walk up the aisle in a bus moving 10m/sec and a seated friend you are walking 1.5m/sec. another friend who just got off the bus standing there waving at you says you are moving 11.5m/sec.and the stalker friend riding his bike next to the bus say your

    asked by ganga
  169. Science

    The normal boiling point for acetone is 56.5 Celsius. The atmospheric pressure is 630torr. What would be the boiling point of acetone, delta Hvap = 32.0 KJ/mol. What would be the vapor pressure of acetone at 25.0 Celsius. Please help me with this problem.

    asked by Joseph
  170. pysics

    one friend is riding his bicycle at the speed of 10m/sec and another friend is riding the bicycle from the opposite direction on same way at same speed and bug is in the middle.what is the distance the bug actually flies before squished.

    asked by ganga
  171. 11th grade

    volatile liquids with lower boiling points give better results than those with higher boiling points. suggest a reason for this.

    asked by Anonymous
  172. psychology

    Brad wonders if he will have a problem later in life with alcoholism. His father is an alcoholic and his great-grandfather had problems holding a job due to his drinking habits. After reading this lesson, Brad believes that a/an __________ study would give

    asked by cindy
  173. psychology

    One way to explain why gene frequencies change is that individuals with traits that are adaptive in an environment will stay alive to reproduce. Over generations their genes will become more common. This process describes: evolution. natural selection.

    asked by john
  174. Medical English essay

    I have to write an essay on 8 questions which are listed in my essay. Each paragraph is to contain an answer for each question using MLA I need an introduction 4 body sentences and a conclusion. Please check my work,my citing and any information on the

    asked by Debby
  175. sculpture

    does the sculpture of apollo and daphne have any range of colors?

    asked by tianna
  176. english

    Please help with my sentences,ect. Thanks! What comes to mind when you hear the words Justice and Unjust? The word Justice means the equality of being justice, in other words doing what is right, fairness and equality. While Unjust is unfair treatment and

    asked by Hani
  177. english

    where is the adjectives and the adverbs in the following paragraphe at the time lorraine hansberry was the yongest american playwriter ,the first woman ,and the first african american to receive the honor . her much celebrated play was A Raisin in the Sun.

    asked by allan
  178. geography

    What is the significance of the day of the dead, what caused the day of the dead, and what are the consquences.

    asked by alainia
  179. Chemistry

    In a gas expansion, 69 J of heat is absorbed from the surroundings, and the energy of the system decreased by 118 J. Calculate the work done. _______ J

    asked by Betty
  180. Video in java(netbeans)

    Hi, i am using netbeans and i'm trying to incorporate a video into my project. I want the program to run a video when a button(jbutton) is clicked. i'm totally lost. p.s. i do have JMstudio to run videos in java but got no clue how to use it. Thank you

    asked by Luke
  181. Calc

    At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)? I believe

    asked by Bill
  182. college

    105 of is initially at room temperature (22). A chilled steel rod at 2 is placed in the water. If the final temperature of the system is 21.3, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452

    asked by Philadelphia University
  183. physics

    A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

    asked by Corey
  184. english

    My topic is "Aliens" I have to have question on the topic and my question is: I'm wondering why Aliens can't be seen by humans. The topic must have exigency what does that mean, can u give examples. help with Research plan and how i can investigate my

    asked by Sara
  185. physics

    A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating. Determine the tangential

    asked by Corey
  186. chemistry

    A 19.5-g sample of a metal was heated to 61.67°C. When the metal was placed into 26.5 g of water in a calorimeter, the temperature of the water increased from 25.00°C to 30.00°C. What is the specific heat of the metal?

    asked by Emily
  187. Numerical method - numerical integration

    Evaluate the following integration: I(f) = integral sign from 0 to 20 of e^(-x) dx 1. Analytically 2. Rectangle method with h= 10,5,4,2,1. 3. Mid-point method with h= 10,5,4,2,1. 4. Trapezoidal method with h= 10,5,4,2,1. 5. Simpson's method with h=

    asked by Anonymous
  188. Calculus

    let a hemisphere of radium 5 be cut by a plane parallel to the base of the hemisphere thus forming a segment of height 2. find its volume using cylindrical shells... thanks

    asked by Oswaldo
  189. chemistry

    Calculate the heat released when 4.260 L Cl2 with a density of 2.46 g/L at 25°C reacts with an excess of sodium metal to form solid sodium chloride at 25°C.

    asked by Emily
  190. chemistry

    How many grams of oxygen gas are required to produce 7.46 kJ of heat when hydrogen gas burns at constant pressure to produce gaseous water? 2 H2(g) + O2(g) → 2 H2O(g) ΔH = −484 kJ Liquid water has a heat of vaporization of 44.0 kJ per mole at 25°C.

    asked by Emily
  191. chemistry

    Can you make a compound and show the electrons for magnesium and sulfur

    asked by samathy
  192. chemistry

    How much heat is released when a mixture containing 12.6 g CS2 and 12.6 g Cl2 reacts by the following equation? CS2(g) + 3 Cl2(g) → S2Cl2(g) + CCl4(g) ΔH° = −230. kJ

    asked by Emily
  193. Business Finance

    Jungle, Inc., has a target debt−equity ratio of 0.72. Its WACC is 11 percent, and the tax rate is 31 percent. (Do not include the percent signs (%). Round your answers to 2 decimal places. (e.g., 32.16)) Required: (a) If Jungle's cost of equity is 14

    asked by Matt
  194. AP Calculus

    A cardboard box of 108in cubed volume with a square base and no top constructed. Find the minimum area of the cardboard needed. (Optimization)

    asked by Anonymous
  195. psychology

    The sentences, "Lee gave the ball to Lynne" and "Lynne received the ball from Lee," have the same: surface structure. syntax. surface and deep structures. deep structure. Does this sentence have both surface and deep structure? From reading my text book, I

    asked by cindy
  196. AP Calculus

    The sum of the two bases and the altitude of a trapezoid is 16ft. a) Define the area A of the trapezoid as function of its altitude. b) Find the altitude for which the trapezoid has the largest possible are. (Optimization)

    asked by Anonymous
  197. physicsss

    A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h? 20.36=V0+5.9x10^-3 =349.1 s is this correct?

    asked by Jay- just need help!
  198. physicsss

    A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h? 20.36=V0+5.9x10^-3 =349.1 s is this correct?

    asked by Jay- just need help!
  199. physics

    A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h? 20.36=V0+5.9x10^-3 =349.1 s is this correct?

    asked by Jay- just need help!
  200. AP chemistry

    When a mixture of acetylene gas (C2H2) and oxygen is ignited and combusted, the reaction produces CO2 and H2O. What mass of acetylene is required to produce 150g of H2O?

    asked by deb
  201. chem

    a molar elipticity [q]466 nm, 25 C of D(−) − Co(en)3I3.H2O and obtained -5940 deg.cm2.decimol-1. Calculate the elipticity angleq (in mdeg) assuming they dissolved 0.25 g sample in 5 mL of H2O and used a 1 x 1 cm cuvette. (

    asked by jack
  202. English

    My mom is still sick. I helped her with the dishes. (In the sentences, what is the meaning of the second sentence? Did her mother washed the dishes with her daughter? Or did her mother not wash the dishes together?)

    asked by rfvv
  203. algebra

    -2x>1/9

    asked by diane
  204. chem

    Complete the reaction? IF no reaction say so H2O C4H6O3 ====> H2O c) Cu ===== > H2O d) K2O=====> e) 2 NaNO3 + ht →

    asked by dan
  205. English

    1. Here is a fresh salad. 2. Here is fresh salad. (Are both grammatical? Which expression is frequently used? Notice the sue of 'article,' please.) 3. Here is a cold strawberry juice. 4. Here is cold strawberry juice. (Are both grammatical? Which

    asked by rfvv
  206. Radioactivity

    Thompson assumed that the amount of positive charge and negative charge in an atom was equal. Was this a reasonable assumption? I really do not understand this.

    asked by Anonymous
  207. English

    I want to take a walk along the Sein River in France. (What is the part of speech of 'in France'? Is it an adverbial phrase or an adjective phrase? Does it modify 'take' or 'the Sein River'?)

    asked by rfvv
  208. psyc

    According to Noam Chomsky, language is primarily acquired through: an innate mental module. our parents correcting us. imitating our parents. trial and error. I chose B. Is this right?

    asked by sophie
  209. Computers

    he office where you work would like to track the cost of office supplies used for a two month period. As office manager you're asked to compare two months worth of inventory and prepare a graphical representation of the comaprison to show th increase or

    asked by Tab
  210. Physics HELP!!!

    A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power

    asked by Molly
  211. Chemistry- please help ASAP!!!! thank you

    S(rhombic)+O2(g)--->SO2(g) change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)--->SO2(g) change in H(rxn)= -296.36 kJ/mol 1. Calculate the enthalpy change for the transformation. S(rhombic)-->S(monoclinic) Our goal is to calculate the enthalpy change for

    asked by Annabelle
  212. Entrep

    Andy Rexford had started his custom embroidery shop in his garage with just one two-head machine and an old computer. From this humble beginning, Custom Stitches had grown into a full-time family business with sales of more than $750,000 a year and

    asked by Linda
  213. Chemistry :(

    Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn)= -1601 kJ/mol 2Fe(s)+(3/2)O2(g)--->Fe2O3(s) change in H(rxn)= -821 kJ/mol Calculate the standard enthalpy change for the following reaction: 2Al(s)+Fe2O3(s)--->2Fe(s)+Al2O3(s) _______kJ PLEASE

    asked by Lucy
  214. physics

    a helicopter of mass m has an acceleration of magnitude 0.12 upward. a)determine the force required to cause this aaceleration? b) how much work is done by this force in moving the helicopter a distance deltay upward?

    asked by samima sabah
  215. psyc

    Studies that have overcome methodological problems in examining intelligence scores for African-Americans as compared to people of Anglo- Saxon descent revealed: that the test results were useless because racial prejudice invalidated them. that

    asked by sophie
  216. college

    What is the total kinetic energy of 1.70 moles of N2 at 30.0 celsius? What formula do I use?

    asked by Sarah
  217. Chemistry

    Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) ¨ 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the

    asked by Sarah
  218. Maths

    Differentiate: y = In ( (x+3) / (x^2) )

    asked by George
  219. physics!

    When empty, a particular helicopter of mass 3770 kg can accelerate straight upward at a maximum acceleration of 1.34 m/s2. A careless crewman overloads the helicopter so that it is just unable to lift off. What is the mass of the cargo?

    asked by caroline
  220. Money and Banking

          Suppose that the price of a stock is $50 at the beginning of a year and $53 at the end of the year, and it pays a dividend of $2 during the year. Calculate the stock’s current yield, capital-gains yield, and the return. Show your work for

    asked by Michelle Robinson
  221. algebra 2

    A farmer wants to raise corn and soybean on a 2010 acre of crop land. Each acre of corn requires 2 hours of labor during growing season while each acre of soybean requires only 1 hour of labor. The total amount of hours of labor available during growing

    asked by Samantha
  222. legal and ethical environment of business

    What is the legal distinction between selling a product and licensing it?

    asked by a
  223. physics

    A shuffle board table is 5 feet tall. A puck slides off the table at 2 m/s. how long before it hits the ground?

    asked by txhllbtch
  224. physics

    Two cubic blocks are in contact, resting on a frictionless horizontal surface. The block on the left has a mass of mL = 6.70 kg, and the block on the right has a mass of mR = 18.4 kg. A force of magnitude 112 N is applied to the left face of the left

    asked by caroline
  225. Physics HELP!!!

    A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power

    asked by Molly
  226. physics

    A skier is accelerating down a 30.0° hill at a = 4.10 m/s2 a) What is the vertical component of her acceleration? b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation

    asked by Haley
  227. Physics

    A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h?

    asked by rob
  228. Europe and russia

    the focus on improving this world is called

    asked by kanesha
  229. algebra

    could someone please check these roblems for me and if they are not rightWOULD YOU PLEASE HELP E WITH THE CORRECT ONES THANKS!!! 1. Slove for X, wher X is the real number, square root 5x + 9= square root 9x + 13= 27 2. Find the value: ^3 square root -27= 9

    asked by lee
  230. physics

    Miguel, the 72.0 kg bullfighter, runs toward an angry bull at a speed of 4.00 m/s. The 550 kg bull charges toward Miguel at 12.0 m/s amd Miguel must jump on the bull's back at the last minute to avoid being run over. What is the new velocity of Miguel and

    asked by brent
  231. Chemistry-College

    S(rhombic)+O2(g)--->SO2(g) change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)--->SO2(g) change in H(rxn)= -296.36 kJ/mol 1. Calculate the enthalpy change for the transformation. S(rhombic)-->S(monoclinic) Our goal is to calculate the enthalpy change for

    asked by Lucy
  232. Chemistry-College

    Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn)= -1601 kJ/mol 2Fe(s)+(3/2)O2(g)--->Fe2O3(s) change in H(rxn)= -821 kJ/mol Calculate the standard enthalpy change for the following reaction: 2Al(s)+Fe2O3(s)--->2Fe(s)+Al2O3(s) _______kJ

    asked by Lucy
  233. physics

    A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h?

    asked by rob
  234. physics

    A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h?

    asked by rob
  235. geography

    What does this mean? For others, death is transcendence, transformation and resurrection.

    asked by alainia
  236. Managerial Economics

    Ross Perot added his memorable “insight” to the debate over the North American Free Trade Agreement (NAFTA) when he warned that passage of NAFTA would create a “giant sucking sound” as U. S. employers shipped jobs to Mexico, where wages are lower

    asked by Dede
  237. Chemistry (Enthalpy)-College

    Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn)= -1601 kJ/mol 2Fe(s)+(3/2)O2(g)--->Fe2O3(s) change in H(rxn)= -821 kJ/mol Calculate the standard enthalpy change for the following reaction: 2Al(s)+Fe2O3(s)--->2Fe(s)+Al2O3(s) _______kJ

    asked by Lucy
  238. College (Enthalpy) - College

    S(rhombic)+O2(g)--->SO2(g) change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)--->SO2(g) change in H(rxn)= -296.36 kJ/mol 1. Calculate the enthalpy change for the transformation. S(rhombic)-->S(monoclinic) Our goal is to calculate the enthalpy change for

    asked by Lucy
  239. Math

    1. Determine the vertex of the parabola: y= 7x^2+14x+6 2. For the following 2 functions,identify the horizontal and vertical asymptotes. a)f(x)= 3x(x-2)/x(x-1) b)g(x)= x/(x+7)^2

    asked by Anonymous
  240. Physics

    Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the magnitude of its acceleration?

    asked by Bala
  241. physics

    A fountain reaches a height of 140 m. The pumps provide 0.50 m^3/s of water. What is the radius of the jet at the bottom of the fountain? Hint: find the velocity first, then use continuity.

    asked by Ashley
  242. algebra

    if one number is four more than twice the second number and the total is twenty five what are the numbers?

    asked by manuel
  243. money and banking

    how economist could use the slope of the yield curve to analyze that a recession will occur and why it may matter

    asked by debra
  244. money and banking

    bought a bond for $10,000. received interest of $400 at end of year, as well as $10,000 principal. inflation rate last year is 5%, calculate the real return. show work

    asked by debra
  245. money and banking

    price of stock is $50 at the beginning of year and $53 at the end of the year, pays dividend of $2 during the year. calculate the stock's current yield, capital gain yield, and the return. show three separate calculations

    asked by debra
  246. Chemistry

    find the reaction quotient: partial pressures are: p of N2=.903, P of H2=.888, P of NH3=.025

    asked by Anne
  247. money and banking

    use capital asset pricing model to predict the return next year stock, return holding stocks to be 12% on average, the interest rate on 3 month t-bills will be 2%. calculate a stock with a beta of -0.3, 0.7, and 1.6. show three separate calculations

    asked by debra
  248. religion

    why did saint juan diego become a saint?how?

    asked by daniel
  249. Chemistry

    find the reaction quotient: partial pressures are: p of N2=.903, P of H2=.888, P of NH3=.025

    asked by Anne
  250. physics. please help!

    A 2.5 kg block is pulled to the right by a horizontal string. The coefficient of static friction between the block and the floor is 0.30 and the coefficient of kinetic friction is 0.20. What value of force applied by the string will start the block moving?

    asked by caroline
  251. chemistry

    Consider the following reaction: CaCN2 + 3H2O ¨ CaCO3 + 2NH3 105.0 g CaCN2 and 78.0 g H2O are reacted. Assuming 100% efficiency, which reactant is in excess and how much is leftover? The molar mass of CaCN2 is 80.11 g/mol. The molar mass of CaCO3 is

    asked by Bob
  252. Physics

    Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the magnitude of its acceleration?

    asked by Bala
  253. math

    Help with this complex fraction please... (a+2/a^2+a-2) - (3a+1/a^2+2a-3) LCM is (a-1) (a+2) (a+3) right? then i get stuck

    asked by Anonymous
  254. chemistry

    Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density = 1.3 g/mL and boiling point = 48.5 degrees Celsius)

    asked by Bob
  255. spanish

    How do you conjugate the word: Tarea?

    asked by john
  256. math

    if you drive 117 miles in 2 1/4 hours, what is your average speed?

    asked by ben
  257. physics

    the speed of a cyclist reduces uniformly from 2.5 m/s to 1.0 m/s in 12 s. (a) calculate the deceleration of the cyclist. (b) calculate the distance travelled by the cyclist in this time

    asked by valerie
  258. algebra

    Help Fast PLEASE!! check for corrections on my problems 1.Rewrte the following in simplified radical form, Assume all variables represents positive real numbers: square root 48y^10= 4y^5 square root 3 2.Rationalize the denomintor and simplify: square

    asked by lee
  259. physics

    A beam of microwaves with = 0.7 mm is incident upon a 12 cm slit. At a distance of 2 m from the slit, what is the approximate width of the slit's image?

    asked by blair
  260. Finance

    explain the relationship between finance and accounting, and how they operate to determine financial viability within a health care organization

    asked by vonnia
  261. precalc

    If a savings fund pays interest at a rate of 10% per year compounded semiannually, how much money invested now will amount to $5000 after 1 year? Please round the answer to the nearest cent.

    asked by Anna
  262. college

    A firm has a debt to asset ratio of 75%, $240,000 in debt, and net income of $48,000. Calculate return on equity.

    asked by Syndi
  263. data management g12

    a bridge hand consists of 13 cards. how many bridge hands include 5 cards of one suit, 6 of a second, and 2 cards of a third?

    asked by chrissy
  264. Physics

    A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the

    asked by Scott
  265. math

    a right triangle has a hypotenuse that measures 2.5m and a leg that measures 2.4m what is the measure of the other leg

    asked by gmoney
  266. chemistry please help

    A 52.0 g piece of copper at 110.0 C is placed in 75.0 g of water at 20.0 C. What is the temperature (in C) of the water once the system reaches equilibrium? The molar heat capacity of copper is 24.5 J/(mol

    asked by Jazmin
  267. physics

    In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." (See Fig. 5-35.) The room radius is 5.4 m, and the rotation frequency is 0.8 revolutions per second when the floor drops out. What is the minimum coefficient of static

    asked by Joe
  268. College English

    I work for a large company. My boss was fired and I get promoted. I must do a power point to address a customer issue. A client was promised 10,000 bolt cups to use in their new truck engines. The parts were received for us to manufacture, but they were

    asked by Maurice D
  269. Physics

    Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the direction of the acceleration in degrees? (Take east to be 0 degrees and counterclockwise to be positive.)

    asked by Bala
  270. Physics

    A block slides down a frictionless plane having an inclination of 13.0°. If the block starts from rest at the top and the length of this incline is 1.62 m, find the acceleration of the block.

    asked by Bala
  271. chemistry

    A 14.5-L tank is filled with H2 to a pressure of 2.00 102 atm. How many balloons (each 2.00 L) can be inflated to a pressure of 1.00 atm from the tank? Assume that there is no temperature change and that the tank cannot be emptied below 1.00 atm pressure.

    asked by Mattie
  272. Calculus

    At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 22 knots and ship B is sailing north at 18 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per

    asked by Anonymous
  273. chemistry

    Calculate the pH during the titration of 20.00 mL of 0.1000 M CH3CH2CH2COOH with 0.1000 M NaOH after 26.5 mL of the base have been added. Ka of butanoic acid = 1.54 x 10-5.

    asked by karla
  274. chemistry

    Calculate the pH during the titration of 20.00 mL of 0.1000 M CH3CH2CH2COOH with 0.1000 M NaOH after 26.5 mL of the base have been added. Ka of butanoic acid = 1.54 x 10-5.

    asked by karla
  275. English-Their Eyes Were Watching God

    Why do you think Starks puts the street lamp on a showcase for a week and then throws a big celebration for its lighting ceremony?

    asked by Laila
  276. Physics

    What angular speed (in revolutions/second) is needed for a centrifuge to produce an acceleration of 1000g at a radius arm of 15.0cm?

    asked by Tommy
  277. College Physics

    A 79 diameter wheel accelerates uniformly about its center from 110 to 360 in 4.5 . 1. Determine its angular acceleration. 2.Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.3 after it has started

    asked by Kezie
  278. chemistry

    Calculate the pressure in the flask in torr, atmosphere, and pascals if ha = 114 mm.

    asked by Mattie
  279. physics

    whtas mu? the cof of friction? or mass or the coef of friction?

    asked by anthony
  280. physics hey bob

    you help me solve this problem. but how am i suppose to if i don't know the mass of the car? on a level road the stopping distance for an automobile is 35.0m for an initail speed of 90 km/hr what is the stopping distance of the same automobile on a simalr

    asked by anthony
  281. chemistry

    a 25.0g sample of magnesium at 22.0 degrees C absorbs 356.3 J of heat. The temperature of magnesium rises to 36.5 degrees C. What is the specific heat of the magnesium?

    asked by josh
  282. 10th grade

    Line m is parallel to line n. The measure of angle 3 is (2x− 3)°. The measure of angle 6 is (x + 39)°. What is the measure of angle 3?

    asked by Anonymous
  283. poly

    the volume of the solid generated by revolving infinite region bounded by x-axis, x=k, and y=1/x+2 in the first quadrant about the x-axis to generate a solid. Find the volume of the solid.

    asked by Baohua
  284. Chem.

    Acetic acid (CH3COOH) reacts with isopentyl alcohol (C5H12O) to form isopentyl acetate (C7H14O2), a fragrant substance with the odor of bananas. CH3COOH + C5H12O -> C7H14O2 + H2O If the yield for the reaction is 45%, how many grams of the product are

    asked by Dave
  285. College Chem involving heat of combustion

    Calculate the heat of combustion: 1.C2H4(g)+3O2(g)===>2CO2(g)+2h20(L) _____kJ/mol 2.2H2S(g)+3O2(g)===>2H2O(L)+2SO2(g) _____kJ/mol

    asked by Anonymous
  286. physics

    an object is initially moving 15.0 m/s. a minute later, it is moving 25.0 m/s in the opposite direction. What is the displacement and acceleration?

    asked by Andrew
  287. math

    if a circle has area 2500pi what is its circumference?

    asked by gmoney
  288. physics.

    a ball is thrown upward with an initial velocity of 38.9 m/s from the edge of a cliff of height H. The ball lands on the ground at the base of the cliff 12.8 s after it is thrown.

    asked by Perry
  289. chemistry

    so is is set up like 356.2J=25.0g(36.5C-22.0C) ?

    asked by josh
  290. Calculus

    a)The curve with equation: 2y^3 + y^2 - y^5 = x^4 - 2x^3 + x^2 has been linked to a bouncing wagon. Use a computer algebra system to graph this curve and discover why. b)At how many points does this curve have horizontal tangent lines? Find the

    asked by Chelsea
  291. Physics-Kinetic energy

    A car has a kinetic energy of 4.32 * 10^5 J when traveling at a speed of 23 m/s. What is its mass? Sorry for re-post and if anyone decides to help please step by step.

    asked by Cory
  292. Chemistry

    A student mixes 95.1g of water at 77.5 degree C with 42.7g of water at 141.1 degree C in an insulated flask. What is the final temperature of the combined water?

    asked by Linetta De La Cruz
  293. Math

    lisa cut a log into 4 pieces in 6 minutes. she then cut a smaller log into 8 pieces. how long should the job have taken if she worked at the same rate she had worked when cutting the first log? show all work and prove your answer.

    asked by DIana
  294. math

    Help with factoring this one: x^9+1 (x^3+1) (x^3-x^3+1) Is this correct?

    asked by lomas
  295. calculus

    Find the relative extrema of f(x) = -2x^2 + 4x + 3 I don't know how to use the First derivative test to find it.

    asked by jack
  296. math

    6 3/8 + 9 1/24

    asked by Cee Cee
  297. Math

    12 1/9 - 4 2/3

    asked by Walle
  298. Chemistry

    Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) ¨ 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the

    asked by Sarah
  299. physics bob

    still i cant find the normal force without mass of automabile. is normal force mass times gravity sin theta? on a level road the stopping distance for an automobile is 35.0m for an initail speed of 90 km/hr what is the stopping distance of the same

    asked by anthony
  300. conversion

    convert the following to a mixed number 163/9

    asked by Walle
  301. 3rd grade

    Mr. McWilliams drove 76 miles Monday and 43 miles Tuesday. Follow the steps to find how many miles Mr.McWilliams drove all together. 1. Estimate the total distance Mr.McWilliams drove. 2. Find the actual total distance.

    asked by Tony
  302. Chemistry

    What is the total kinetic energy of 1.70 moles of nitrogen gas at 30 celsius? Please explain step by step by providing formula.

    asked by Sarah
  303. physics bob

    yeah im really confused. is there any way i can pay you to be my tutor

    asked by anthony
  304. statistics

    The mailing list of an agency that markets scuba-diving trips to the Florida Keys contains 60% males and 40% females. What is the probability that 20 of the 30 are men?

    asked by joe
  305. fraction

    convert the following to an improper fraction 8 1/8

    asked by Pat
  306. physics

    A soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is +30.0m/s. How long is the ball in the air? -What is the maximum height reached by the ball? -What is the horizontal distance traveled

    asked by Esora
  307. physics nvm bob

    it all makes sense!!!! thanks

    asked by anthony
  308. Chemistry

    In 2.00 min, 28.4 mL of He effused through a small hole. under the same pressure and temperature, 9.69 mL of a mixture CO and CO2 effused trough the hole in the same amount of time using the following mathematical formula relating rate of effusion to molar

    asked by Sarah
  309. physics.

    an object travels 219 meters with acceleration 6.43 m/s^2 over an interval of 2.86 seconds. What are Vi and Vf.

    asked by Haley
  310. english

    Thanks for help and websites. Here is what I've written about the building fence so far. please tell me if I'm on the right path. I'm for building the fence and tell me if i need to correct my sentence. Thanks! Due to borders being unsafeguarded, illegal

    asked by Kelly
  311. Physics

    Estimate the force a person must exert on a string attached to a 0.160 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.80 revolutions per second. Do not ignore the weight of the ball. In particular,

    asked by Joe
  312. Algebra

    I know the answer to the question, but don't know how to write it out. What is the percentage of increase from 58,000 to 89,000.

    asked by CJ
  313. statistics

    The mailing list of an agency that markets scuba-diving trips to the Florida Keys contains 60% males and 40% females. What is the probability that 20 of the 30 are men?

    asked by joe
  314. Chemistry

    Suppose that you are planning a backpacking trip and will need to boil 40 L of water for your group. What volume of fuel should you bring? Assume each of the following: the fuel has an average formula of C7H16; 15% of the heat generated from combustion

    asked by Kristen
  315. algebra

    you deposit 8500 dollars in an account that pays you 3.5 % interest compounded continuously. How long will it take for the money to triple?

    asked by frank
  316. chemistry- thank you

    How much of a 0.23 M NaOH solution is needed to neutralize 27 mL of a 0.85 M sulfuric acid solution? The units are mL

    asked by Jazmin
  317. Chemistry

    The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H ions;that is, delta H(f) [H+(aq)]=0 A.for this reaction: calculate delta H(f) for the Cl- ions. HCl(g) ==H2O==>H+(aq)+Cl-(aq) delta

    asked by Kristin
  318. math

    I know youall are very busy an that answering posts takes time, but I am in real need of some one to check my questions to see if they are correct, because I need to post my answers very SOON!! PLEASE HELP!!!! THANKS!!

    asked by lee
  319. chemistry please help

    The FM band of radio waves are measured in megahertz (MHz), which are the numbers you see on the radio dial. Therefore, a radio station at 102.5 on the FM dial has a frequency of 102.5 MHz or 102,500,000 Hz. What is the wavelength of the radio station that

    asked by Tamina
  320. Chemistry

    If 3.50g of Na3Po4 and 6.40g of Ba(No3)2 are added together how many grams of Ba3(PO4)2 will be produced? Which is the limiting reactant? Please explains step by step THANK YOU

    asked by Jessica
  321. Physics - centripetal acceleration

    What is the centripetal acceleration of a satellite orbiting Saturn at the location exactly on Saturn radius above the surface of Saturn

    asked by Farah
  322. chemistry

    Consider the following reaction. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) ÄH = -891 kJ Calculate the enthalpy change for each of the following cases. (a) 5.00 g methane is burned in excess oxygen.

    asked by Anonymous
  323. Physics

    Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.

    asked by Lisa
  324. business

    How may you use the study techniques recommended for your personality type and strongest intelligences to function best in a distance-learning environment?

    asked by tte
  325. chemistry

    What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)

    asked by Anonymous
  326. PHYSICS

    a kick returner in a football game runs a constant 5.24 m/s toward the goal line, which d= 50.0 m away. at the instant shown, a tackler is 11.2 behind him, chasing at a constant 6.49 m/s. How far from the goal line is he tackled? When is he tackled?

    asked by sarah
  327. chemistry please help

    How many core electrons are there in a ground state phosphorus atom?

    asked by Ena
  328. Chemistry

    A gaseous reaction occurs at a constant pressure of 50.0 atm and releases 55.6 kJ of heat. Before the reaction, the volume of the system was 7.60 L. After the reaction, the volume of the system was 2.00 L. Calculate the total internal energy change, Delta

    asked by Rani
  329. SOCIAL STUDIES

    WHAT IS THE SOURCE OF THE DELAWARE RIVER IN NJ?

    asked by JAKE
  330. SOCIAL STUDIES

    WHAT 2 AQUIFERS PROVIDE THE WATER SUPPLY TO HALF THE PEOPLE IN NJ

    asked by JAKE
  331. chemistry-check answer

    Suppose you have a 10 watt fluorescent light bulb. If this light bulb is 6 % efficient in turning electricity into light, then how many photons are being emitted per second? Assume that average energy of all the photons emitted is 550 nm, thus you can

    asked by Jazmin
  332. physics

    A box slides down a 22° ramp with an acceleration of 1.19 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.

    asked by Anonymous
  333. chemistry

    Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas?

    asked by smith
  334. chemistry

    How many grams of methane gas (CH4) are in a 15.8 liter sample at 1.2 atmospheres and 27°C

    asked by smith
  335. question for DR.BOB

    where are you helping from? I'm just curious

    asked by Jazmin
  336. Algebra

    Hello Reiny, please check these problems for me and if they are not right WOULD YOU PLEASE HELP ME WITH THE CORRECT ONES THANKS!!! 1. Slove for X, wher X is the real number, square root 5x + 9= square root 9x + 13= 27 2. Find the value: ^3 square root -27=

    asked by lee
  337. chemistry

    Suppose that you are planning a backpacking trip and will need to boil 40 L of water for your group. What volume of fuel should you bring? Assume each of the following: the fuel has an average formula of C7H16; 15% of the heat generated from combustion

    asked by Anonymous
  338. chemistry

    Which of the following gases effuses the fastest at a given temperature? Ne CH4 Ar H2

    asked by smith
  339. chemistry

    What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)? 6.4 L 22.4 L 32.0 L 78.4 L

    asked by smith
  340. World History

    what are the trade innovations of Islam?

    asked by Angeliqua
  341. math

    please - How do we manually calculate the Present Value of annuity step by step using this formula: PV=R[1-(1+i)-n / i for example: PV = 2700[1-(1+.065)-4 ___________________ = 9249.66 0.065 How did they get this answer (9249.66)? I'm so lost. just to

    asked by Dania
  342. ALGEBRA

    is this correct if not can you tell me whaT it is please!!! 32 3/5= 163/5

    asked by lee
  343. Physics

    A particle travels horizontally between two parallel walls separated by 18.4 m. It moves toward the opposing wall at a constant rate of 9.8 m/s. Also, it has an acceleration in the direction parallel to the walls of 3.7 m/s2.At what angle with the wall

    asked by Diana
  344. chemistry

    Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas? 6.5 g/mol 11 g/mol

    asked by smith
  345. English

    By using past studies and scholarly articles, I became more informed of the affects that participating in music has on standardized test scores. Does the sentence above sound correct or is there a better way it can be written?

    asked by Jon
  346. physics

    A 4kg box starts up a 30 degree incline with 128J of kinetic energy. How far will it slide up the plane if the co-efficient of friction is 0.3?

    asked by LOST..
  347. physics

    A box of mass 10kg starts from rest and slide down a plane angled at 45 degrees to the horizontal. the box slides 2m down the plane before it encounters a spring with constant k=500 N/m which causes it to come to rest. What will the maximum compression of

    asked by amy
  348. chemistry

    How many liters of fluorine gas, at standard temperature and pressure, will react with 23.5 grams of potassium metal?

    asked by smith
  349. Chemistry

    when Fe(NO3)3 and KNCS were mixed they reacted together to establish an equilibrium with FE(NCS)+2. what are the changes in terms of quotient Q when the solutions were just mixed (no reaction), to the point where equilibrium is reached.

    asked by LP
  350. Organic Chemistry

    What is/are the product(s) of the potassium permanganate reaction with (R)-4-methyl cyclohexene? Is the product a meso molecule, racemic mixture, or other mixture, and if so, what kind of mixture? If the product is a mixture, do you expect the compounds to

    asked by Anonymous
  351. Physics - gravitational fields

    The planet Neptune has gravitational field intensity of 10.3nékg at a height of 1.00*10?6m above its surface. If the radius of Neptune is 2.48*10?7m, what is its mass

    asked by Farah
  352. Algebra II

    If 0 = 19 and the 0 is the variable, what would be the answer in the case of substitution?

    asked by Anonymos