1. Physics

    An organ pipe open at both ends has a harmonic with a frequency of 480 Hz. The next higher harmonic in the pipe has a frequency of 540 Hz. Calculate the frequency of the fundamental and the length of the pipe. I know 540/480 is 9/8. I have no idea where to

    asked by Rachel on January 26, 2011
  2. chemistry

    Calculate the amount of moles in CH3COOH which is 5%acedic acid and C3H7OH which is 70% usp? This is what I got.....For the amount of 50 ml -> 50mL = 50g ->50g/18.016 = 2.7 moles in 50 ml of H2O For the amount of 50 ml -> 50mL = 50g ->50g/60.09500 g = .83

    asked by Will J on December 11, 2011
  3. Econ

    Total value of all assets in US YEAR ...total value of all final services in US ...total value of all final goods in US ...final goods and services produced by American firms in other countries ^ If I knew everything above, how would I calculate the GDP

    asked by Evan on July 3, 2009
  4. maths

    sarah invested £12000 in a unit trust 5 years ago, the value of the unit trust increased by 7% per annum for each of the last 3 years. before this the price had decreased by 3% per annum. calculate the current price of the unit trust

    asked by hayden on October 26, 2017
  5. physics

    Socola and Brooke are balanced on a teeter-totter plank as shown below. Socola has a mass of 7.7 kg, and Brooke’s mass is 53 kg. Brooke is located 1.0 m from the pivot. Assume the plank is massless, and calculate how far Socola is from the pivot (x).

    asked by buddy on July 29, 2013
  6. chemistry

    Calculate the amount of moles in CH3COOH which is 5%acedic acid and C3H7OH which is 70% usp? This is what I got.....For the amount of 50 ml -> 50mL = 50g ->50g/18.016 = 2.7 moles in 50 ml of H2O For the amount of 50 ml -> 50mL = 50g ->50g/60.09500 g = .83

    asked by Will J on December 11, 2011
  7. math

    x^2-3x+2

    asked by please i need help.Dan on September 17, 2006
  8. AlgebraB-2

    I need help with figuring out how to do these problems to get the right answer. Appreciate any help. Thanks. Multiple choice: 1. What is the value of n so that the expression x² + 12x + n is a perfect square trinomial? 6 36 72 144 2. What are the

    asked by Jennifer W. on March 20, 2013
  9. Quantum Computing

    In this problem, we will carry out some steps of the quantum factoring algorithm for N=21. (a) What is the period k of the periodic superposition set up by the quantum factoring algorithm if it chooses x=2? In other words, what is the period of f(j)=2^j

    asked by imath on September 22, 2013
  10. science

    when copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. what mass of silver is produced from 100.g Cu?

    asked by Sandy on April 19, 2016
  11. Chemistry

    Explain Why some ionic compounds are soluble in water. Explain why non-ionic compounds, such as ethanol or sugar are soluble in water. Explain what a saturated solution.

    asked by Allison on March 10, 2015
  12. MATH 157

    How do I determine the real number solution for the following problem: The problem reads : Determine the number of real-number solutions to the equation from the given graph. x^2 - x + 15 = 0, given the graph of y = x^2 - x + 15

    asked by Janelle on July 29, 2011
  13. Chemistry

    Is dissolving salt in water an example of reversible? I don't think so because once salt is in water, the water is not clear anymore. Pls help. thanks. Yes, it is reversible. One ca physically separate the salt and water (evaporation) What do you mean by

    asked by Linda on February 14, 2007
  14. chemistry.

    in the titration between Na2CO3 and HCl... 1) at the first end point what reaction is stoiciometrically complete? 2)At the start of titration where HCl=0 is the solution acidic or basic. ExPlain? 3) At the 2nd end point what reaction is stiociometrically

    asked by zoe on March 13, 2011
  15. intro to chem

    disolving sucrose, NaCl< and calcium chloried affect the boiling point of frezing point of water. Assuming that you have 0.1m solution of all these 3 compounds: a)rank then in order of decreasing freezing point. b) rank in order of increasing boiling point

    asked by julia on October 27, 2010
  16. electrical principles

    Four resistors , each of 240ohms are connected in parallel , and the group then joined in series with a heater of 40ohms resistance. Then complete circuit is connected to a 240volts supply . Calculate total resistance in the circuit , the power dissipated

    asked by Achwil Solo on March 19, 2015
  17. Algebra

    The cost, in millions, to remove x% of pollution in a pond is modeled by the equation: C=6350/(425-3x) . What is the cost to remove 75% of the pollution? Hint: Plug in and calculate, do not convert to a decimal. Can someone tell me how figure this out step

    asked by becca on December 15, 2011
  18. Chemistry

    A sample of gas contains 0.1900 mol of HBr(g) and 9.500×10-2 mol of Cl2(g) and occupies a volume of 11.2 L. The following reaction takes place: 2HBr(g) + Cl2(g)2HCl(g) + Br2(g) Calculate the volume of the sample after the reaction takes place, assuming

    asked by Zach on October 8, 2017
  19. physics

    quick answer of a boy is running on a straight road.He run towards north in 2 minutes and 10 seconds and then turn back and runs 200m in one minute.Calculate his average speed and magnitude of average velocity during first 2 minutes and 10 seconds and his

    asked by tarun on June 22, 2010
  20. chemistry

    at an equilibrium mixture of PCl5, PCl3, and Cl2 has partial pressures of 217.0 Torr, 13.2 Torr and 13.2 Torr respectively. a quantity of Cl2 is injected into the mixture, and the total pressure jumps to 263.0 Torr (at the moment of mixing). the system

    asked by lasya on February 26, 2014
  21. Physics

    So I got a question One 3.5-kg paint bucket is hanging by a massless cord from another 3.5-kg pain bucket, aslo hanging by a massless cord if the buckets are at rest, what is the tension in each cord? How do I do this is this just the normal or what I do

    asked by Physics on July 10, 2009
  22. Physics

    A ball is ejected to the right with an unknown horizontal velocity from the top of a pillar that is 50 meters in height. At the exact instant, a carriage moving on rails is also released to the right from the bottom of the pillar. Calculate the velocity

    asked by Lauren01 on February 22, 2012
  23. chemistry

    A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz), where 1 MHz =10^6 Hz}. Calculate the broadcast wavelength of the radio station 98.70 FM. can someone please explain this question for me, i tried several

    asked by risha on October 23, 2010
  24. physics

    If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads). (a) Calculate the ideal speed to take a 95 m radius curve banked at 15°. m/s (b)

    asked by Shonda on July 21, 2014
  25. Physics

    The note D above middle C has a frequency of 294 cycles per second, and the note E has a frequency of 330 cycles per second. A driver of a moving car sounds the horn, which emits an E tone, but a stationary observer hears a D tone. Calculate the speed at

    asked by Tom on April 25, 2018
  26. chemistry

    at an equilibrium mixture of PCl5, PCl3, and Cl2 has partial pressures of 217.0 Torr, 13.2 Torr and 13.2 Torr respectively. a quantity of Cl2 is injected into the mixture, and the total pressure jumps to 263.0 Torr (at the moment of mixing). the system

    asked by lasya on February 25, 2014
  27. physics

    A glass bottle full of mercury has mass 500g. On being heated through 35 degree census, 12.43 gram of mercury expelled. Calculate the mass of mercury remaining in the bottle (cubic expansivity of mercury is 1.8 * 10 raise to power -4 pre Kelvin, linear

    asked by poppy on April 23, 2019
  28. Algebra 2

    suppose you have 10 green marbles, 10 gold marbles, and ten black marbles. You also have 3 bags. Your plan is to ask a friend to randomly select a marble from one bag. How should you distribute all the marbles amongthe 3 bags to maximize the probability

    asked by Ann-Marie Guischer on February 7, 2012
  29. math

    The trunk of a leaning tree makes an angle of 12 degrees with the vertical. To prevent the tree from falling over, a 35.0 m rope is attached to the top of the tree and is pegged into level ground some distance away. if the tree is 20.0 m from its base to

    asked by Yiu on April 28, 2015
  30. math

    Two different relationships are shown below. Relationship 1: xy = 3 Relationship 2: A graph is shown that has the following points plotted: one comma three, two comma six, three comma nine, four comma twelve. a) Identify each relationship as direct or

    asked by erika on April 16, 2013
  31. Math 9 algebra

    A mechanic charges $70 an hour plus the cost of parts to repair a vehicle. The parts cost $215 for the repair on Tamara's car. A) write an expression for the total cost, C, of repairing Tamara's car for any numbers of hours, n. B) use the expression you

    asked by Molly on January 26, 2013
  32. Math

    A ball is dropped from a height of 36 feet. The quadratic equation d=1/2 gt^2 is used to calculate the distance (d) the ball has fallen after t seconds. The constant g is the acceleration of gravity, 9.8m/s^2. How long does it take the ball to hit the

    asked by Lux on November 19, 2012
  33. Maths

    A metal sphere of diameter 12cm is metted to formed a sphere of diameter 6cm calculate the number of sphere formed from the metal sphere

    asked by Dayo on January 14, 2013
  34. physics

    A force of 100 Newtons acts upwards on a mass of 50 kg, another force of 60 newtons acts on the same mass downwards. calculate the accleration in which direction will be the accleration

    asked by Haley on January 16, 2011
  35. math

    1.) when the expression 4x^2-3x-8 is divided by x-a, the remainder is 2. find the value of a. 2.) the polynomial 3x^3+mx^2+nx+5 leaves a remainder of 128 when divided by x-3 and a remainder of 4 when divided by x+1. calculate the remainder when the

    asked by Nialleen on August 4, 2014
  36. Physics

    Two forces 18N and 10N are inclined at right angle of 60° to each other. calculate (i) the resultant force (ii) the angle of resultant forces that makes the force of 10N.

    asked by Gabby on January 28, 2017
  37. Chemistry

    Ethyl alcohol which is prent in many beverages molecular formular C2H6O.If 9.2g of ethyl alcohol are available.Calculate number of molecular of ethyl alcohol 9.2g of ethyl alcohol.

    asked by Anonymous on March 24, 2013
  38. Finance

    Calculating Beta... Hi I need help... I need to calculate Beta and Here is what is given. Please if you can explain how... Here's the given X's StdDev of monthly return = 12% with a 0.80 market correlation. The StdDev of Market monthly return is 6%

    asked by Dantes on October 4, 2011
  39. chemistry calculations

    At some temperature,the reaction PCl3(g) +Cl2(g) ====PCl5(g) is at equilibrium when the concentration of PCl3, Cl2, and PCl5 are 10, 9.0, and 12mol/L, respectively. Calculate the value of Kc for this reaction at that temperature.

    asked by =) on August 30, 2014
  40. chemistry calculations

    At some temperature, the reaction PCl3(g)+Cl2(g)====PCl5(g) is at equilibrium when the concentration of PCl3, Cl2, and PCl5 are 10, 9.0, and 12 mol/L, respectively. Calculate the value of Kc for this reaction at that temperature.

    asked by =) on August 19, 2014
  41. Physics

    The critical angle of glass is 41degree 48 seconds and that of water is 48 degree 36 seconds.calculate critical angle of the glass water interface?

    asked by Gash on March 13, 2019
  42. Finance

    Currently, there are 560,000 shares outstanding at $85 each. There will be 65,000 new shares offered at $84 each. Calculate each of the following: • The new market value of the company. • 560,000($85) + 65,000($60) • 47,600,000 + 3,900,000 • =

    asked by Anonymous on December 16, 2013
  43. Chem

    The following results were obtained when a sample of pineapple juice was analyzed to determine its vitamin C content. A 19.8 mL sample of pineapple juice was placed in a flask with 20 ml of 0.5 M H2SO4, 1.0 g of potassium iodide, KI, and 25.00 mL of

    asked by Anonymous on May 5, 2014
  44. Chemistry

    Find the concentration of H3O if the pOH of a solution is 11.700: So far I have: pH= 14.000- pOH which is 14.000-11.700=2.300 pH = -log[H3)] -2.300 = log[H3O] Lost after that!!! Help please.

    asked by Lucy on December 2, 2007
  45. Operations Research

    The Ploughman family farm owns and operates a 640-acre farm that has been in the family for several generations. The Ploughman’s always have had to work hard to make a decent living from the farm and have had to endure some occasional difficult years.

    asked by Meme on April 22, 2013
  46. science calculation

    You have been asked to complete a screening-level risk assessment in order to compare routes of chemicals exposure and to determine whether the chemical exposure poses a potential health risk. The receptor is a 70 kg man who has worked 8 hours per day as

    asked by Reena! plse help on July 7, 2009
  47. college physics

    Suppose a 69 kg person stands at the edge of a 7.8 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1600 kg*m^2. The turntable is at rest initially, but when the person begins running at a speed of

    asked by Anonymous on March 29, 2010
  48. physics

    1) A golf ball is hit from a position that is 4m higher than h ehorizintal area where the ball lands. The intiial velocity of he ballis 30ms-1 at a angle of 0 above the horizintal a)show that the maximum height of the ball above the landing area is

    asked by 0ooooooooo0 on September 28, 2017
  49. Chem Check Please!!!

    1) Calculate the cell potential, at 25 C, based upon the overall reaction Zn2+(aq) + 2 Fe2+(aq) -> Zn(s) + 2 Fe3+(aq) if [Zn2+] = 1.50 x 10^-4 M, [Fe3+] = 0.0200 M, and [Fe2+] = 0.0100 M. The standard reduction potentials are as follows: Zn2+(aq) + 2

    asked by Chris on May 3, 2014
  50. Math

    You have $30 to spend on picking 25 pounds of two different types of fruit at a farm. The apples cost $1.40 per pound the blueberries cost $.90 per pound and the cherries cost $1.10 per pound. You want prices many pounds of apples as the other two fruits

    asked by Jude on April 10, 2016
  51. chemistry

    2,4,6-Trinitroanilin can be prepared by nitration of p-nitroaniline with nitrate ions in the acidic solution. Chemical engineer sounds 0.50 grams of p-nitroaniline (dissolved in sulfuric acid) to react with 0.60 g of sodium nitrate (dissolved in sulfuric

    asked by jocckee on September 5, 2013
  52. maths

    Two boat A and B left a port at the same time on different route. B traveled on the bearing of 150 degree and A traveled on the north side of B when had traveled 8 kilometer and B had traveled 10 kilometer. The distance between the two boat was found to be

    asked by kehinde on May 30, 2016
  53. Math

    Monica wants to know what she needs to get on the exam to get a certain grade in her English class. The term Mark is worth 70% of the course and exam is worth 30%. The following is the formula used to calculate her overall Mark. Course Mark = term Mark +

    asked by Emma on February 20, 2017
  54. Algebra

    A cup of coffee contains about 100mg caffeine. The exponential function A(t)=100(0.84)^t is used to calculate the amount of caffeine in a body t hours after the coffee was consumed. Find the amount of caffeine in the body after 4 hours. Can someone help

    asked by ##000000 on September 17, 2012
  55. Physics

    For which of the following situations can the equation F = mg not be used to calculate the force due to gravity? a) The pull of gravity on an apple on the surface of the Earth. b) The pull of gravity on an airplane flying at an altitude of 8 km above the

    asked by Kelvin on November 19, 2012
  56. Chemistry

    Consider that: the tetravalent cation of an isotope has 78 electrons and 128 neutrons; Nuclear relative mass of the same cation is 1.44% higher than the relative nuclear mass of its most common isotope based on these data, calculate the number of neutrons

    asked by William on January 26, 2016
  57. Knox fields.

    A garden in form of a square is surrounded by a path which is 1m wide on two opposite sides and 1^2m wide on the other two opposite sides.if the area of the path is 17m^2.Calculate the perimeter of the garden and the area of the space covered by the garden

    asked by Opeyemi on September 15, 2015
  58. math

    Luke build a model train to a scale of 1:25.calculate a copy of the table below using his scale. length of engine on the real x and on the model is 16cm. length of train on the real 20m and x on the model. height of train is x and 12cm on the model.

    asked by Vanessa on May 29, 2017
  59. science

    A minibus of mass 3000kg,travelling at a speed of 30m.s to the right,collides with a car of mass 1600kg,travelling at 16m.s to the right. After collision the car continues to travel to the right at a speed of 17,2m.s. Calculate the speed of the minibus

    asked by zama on January 24, 2016
  60. physics

    A ball of mass 0.1kg is dropped from a height of 8m into a hard floor and bounces back to a height of 2m calculate the velocity when the ball hits the ground, the velocity with which the ball leaves the ground,the momentum when the ball hits the ground

    asked by baby on January 18, 2017
  61. economics

    Calculate REAL GDP for each year (2005=100). Yr. Price of/Qty. Price of/Qty. socks produced hats produced 2005 $1 100 $2 50 2006 $2 150 $3 100 2007 $3 200 $4 150

    asked by Julie on April 15, 2008
  62. ACCOUNTING

    If the actual factory overhead applied is more than the actual factory overhead incurred _________. (Points : 1) A a favorable variance is produced B an unfavorable variance is produced C no variance is produced D there is no way to calculate which way the

    asked by madam on November 19, 2016
  63. Chem

    A 53.31-g sample of water at 88.8 degrees C is added to a sample of water at 23.9 degrees C in a constant- pressure calorimeter. If the final temperature of the combined water is 43.3 degrees C and the heat capacity of the calorimeter is 26.3 J/degrees C,

    asked by k on November 2, 2012
  64. Chemistry

    The theoretical yield of a reaction is the amount of product obtained if the limiting reactant is completely converted to product. Consider the reaction: P4(s) + 6 Cl2(g) → 4 PCl3(l) If 19.47 g P4 is mixed with 6.85 g Cl2, calculate the theoretical yield

    asked by Riley on November 26, 2015
  65. Chemistry

    Consider that: the tetravalent cation of an isotope has 78 electrons and 128 neutrons; Nuclear relative mass of the same cation is 1.44% higher than the relative nuclear mass of its most common isotope based on these data, calculate the number of neutrons

    asked by William on January 26, 2016
  66. physics

    n automobile has a vertical radio antenna 1.40 m long. The automobile travels at 30.0 km/h on a horizontal road where Earth's magnetic field is 50.0 µT, directed toward the north and downward at an angle of 65.0° below the horizontal. (a) Specify the

    asked by ricky on March 26, 2018
  67. ACCOUNTING

    Same Day Service purchased a new steam press on January 1, for #35,000. It is expected to have a five year useful life and a $3,000 salvage value same day expects to use the steam press more extensively in the early years of its life. 1.Calculate the

    asked by yorkie16 on August 22, 2009
  68. physics

    A 5.9 m wire with a mass of 79 g is attached to the mast of a sailboat. If the wire is given a "thunk" at one end, it takes 0.087 s for the resulting wave to reach the other end. 1. What is the tension in the wire? 2. Calculate the tension for a 89-g wire.

    asked by Brienne on December 2, 2012
  69. chemistry

    Gas X has a density of 2.60g/L at STP. Determine the molar mass of this gas. Sorry there was some typos on the previous question. please show me again steps by steps. thank you =] Same answer. You just left the g off the density. One mole of ANY (ideal)

    asked by michelle on March 21, 2007
  70. Waves & Tension

    A 5.9 m wire with a mass of 79 g is attached to the mast of a sailboat. If the wire is given a "thunk" at one end, it takes 0.087 s for the resulting wave to reach the other end. 1. What is the tension in the wire? 2. Calculate the tension for a 89-g wire.

    asked by Brienne on December 2, 2012
  71. Finance

    Calculate the required rate of return for Mercury Inc. to the nearest .1 Assume that investors expect a 3.0 percent rate of inflation in the future. The real risk-free rate is equal to 5.8 percent and the market risk premium is 9.3 percent. Mercury has a

    asked by Lisa on June 4, 2013
  72. physics

    If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads). (a) Calculate the ideal speed to take a 105-m radius curve banked at 13.0°. km/h

    asked by HELP!!! on November 30, 2012
  73. Chem

    Does my work here look right? 3. One mole of an ideal gas expands adiabatically into a vacuum. Calculate q, delta-e, w, and delta-H for the process. q= 0 [adiabatic] w= -Pext(V2-V1) w= 0 delta-e = w + q delta-e = 0 + 0 = 0 delta-h= delta-e + P(delta V)

    asked by Jess on February 3, 2007
  74. Physics Questions!

    An interference pattern is set up by two point sources of the same frequency, vibrating in phase with one another. A point on the second nodal line is 50.0 cm from one source and 59 cm from the other. The speed of the waves is 35 cm/s. Calculate the

    asked by URGENT on December 15, 2007
  75. Physics (please help)

    Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Eart when the two forces are in direct competition, that is, when the Sun, Moon and Eart are aligned with the Moon between the Sun and the Earth. This alignment

    asked by Bon oncle on April 28, 2011
  76. PHYSICS!!!!!!!!!!!!!!!!

    the height from where the water bomb will be released on the overpass is 4.5 m and the target student is 170 cm tall. the student realises that, as his target will be moving, he must release the water bomb when his friend is a certain horizontal distance

    asked by NEED HELP ASAP!!!!!!!!!!! on October 16, 2012
  77. PHYSICS!!!!!!!!!!!!!!!!

    the height from where the water bomb will be released on the overpass is 4.5 m and the target student is 170 cm tall. the student realises that, as his target will be moving, he must release the water bomb when his friend is a certain horizontal distance

    asked by NEED HELP ASAP!!!!!!!!!!! on October 17, 2012
  78. Algebra

    Bobbie delivers pizza after school. The price of each pizza he delivers is $14. There is also a $3 delivery charge. To calculate the cost of a customer's order before taxes, he uses the equation t = 14p + 3, where t is the cost before taxes and p is the

    asked by Osarhemen Igbinosun on July 24, 2018
  79. Chemistry

    A hydrated MgSO4 salt, weighing 3.211g, is heated in a crucible until reaching a constant weight. The weight of the anhydrous MgSO4 is 1.570 grams. 1. Calculate the moles of H20 removed and the moles of anhydrous MgSO4 remaining in the crucible. 2. What is

    asked by Marty on October 20, 2007
  80. Math

    Bobbie delivers pizza after school. The price of each pizza he delivers is $14. There is also a $3 delivery charge. To calculate the cost of a customer's order before taxes, he uses the equation t = 14p + 3, where t is the cost before taxes and p is the

    asked by Osarhemen Igbinosun on July 24, 2018
  81. physics

    a boy is running on a straight road.He run towards north in 2 minutes and 10 seconds and then turn back and runs 200m in one minute.Calculate his average speed and magnitude of average velocity during first 2 minutes and 10 seconds and his average speed

    asked by tarun on June 22, 2010
  82. Physics

    What work is required to stretch a spring of spring constant 500N/m from x1=.2m to x2=.25m? Assume the unstreched position is at x=0. W=Fd so w=(500)(.25-.2) =500(.05) =25J is this correct? Calculate the work required to compress an initially uncompressed

    asked by Andrea on October 17, 2007
  83. math

    i've been asked to ifnd the price-earning ratio of some stocks i'm unsure of how to do this I do not know which EPS value to use as I found some valeus on a website... Like for this company that I got a stock for h t t p : / / w w w . m a r k e t w a t c h

    asked by Kate on January 4, 2010
  84. Dobson

    a)The element with the greatest density is osmium, which has a density of 22.6g/cm3. Calculate the mass of 32.1 cm3 of osmium. b)A team of students determined the density of a sample of wood to be 0.52 g/cm3. A handbook of chemistry reported the density of

    asked by Anonymous on March 26, 2010
  85. global science

    Michael Phelps won the 100 meter butterfly, Phelps swam 100 meters in 50.58 seconds. the 2nd place swimmer swam the 1oo meters in 50.59 seconds. Phelps beat him by 1/100th of a second. Calculate, in inches, the distance Phelps beat Cavic by

    asked by Anonymous on September 7, 2010
  86. satistiks

    The weights of male nurses in a hospital are known to be normally distributed with mean ƒÝ = 72 kg and standard deviation ƒã = 7.5 kg. The hospital has a lift (elevator) with a maximum recommended load of 450 kg. Six male nurses enter the lift.

    asked by nide on December 1, 2015
  87. physics

    Two identical small spheres of mass 2.0g are fastened to the ends of an insulating thread of length 0.60m The spheres are suspended by a hook in the ceiling from the centre of the thread. The spheres are given identical electric charges and hang in static

    asked by Diana on February 9, 2011
  88. chemistry-gases-ppm

    Nitrogen dioxide reacts with water and oxygen in the atmosphere to produce acid rain. 4NO2(g) + 2H2O(g) + O2(g) = 4HNO3(g) Assuming that the temperature and the pressure remain constant, calculate the volume of air at 1 atm, 20 C, necessary to dilute the

    asked by Rose Bud on March 1, 2012
  89. math 116

    Will someone please help me slove this problem. A family refers to a group of two or more people related by birth, marriage,or adoption who resides together. In 2,00in Country A, the average family net worth was $460,000, and there were about 9.3 x 10 to

    asked by meka a on March 3, 2013
  90. Chemistry(Please help)

    1) Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227oC Using delta Ho = 81.2 kJ and delta So = 128 J/K, calculate the value of the equilibrium constant for this reaction. I do not know how to

    asked by Hannah on April 24, 2012
  91. calculus

    Ice cream drips out of the bottom of an ice cream cone on a hot day at a rate of r(t) mL per second, as a child eats it slowly, where t is in seconds. If r(t) = 10 e^{-k t}, complete the definite integral expressing the quantity of ice cream lost in the

    asked by ricky on March 8, 2014
  92. Chemistry 1002

    Over a period of time, the concentration of sulfuric acid in a lead storage battery of an automobile has decreased from 38 percent by mass(density=1.29 g/mL) to 26 percent by mass(1.19 g/mL). Assume the volume of the acid remains constant at 715 mL.

    asked by Jen on April 19, 2015
  93. physics

    A car with a weight of 15 000 N is being towed up a 20o slope at constant velocity. Friction is negligible. The tow rope is rated at 6 000 N maximum tension. a. Draw the free body diagram, by cleverly choosing the coordinate system. (5 marks) b. Calculate

    asked by anonymus on September 2, 2018
  94. please help physics!!

    Two toy ducks attached to each other by a string, are being pulled by a child. The front duck is m1= 5.0 kg and the back duck is m2= 2.0 kg. The happy guy pulls them with a force of 10 N and friction exists. The toys are moving with constant velocity. A)

    asked by Anonymous on October 22, 2014
  95. Physics

    A centrifuge is a common laboratory instrument that separates components of differing densities in solution. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical laboratory is

    asked by Jc on October 23, 2011
  96. Physics

    A girl standing on a stationary uniform plank 10m long. The plank can move with negligible friction along the surface of the water. A) the girl walks along the plank with a velocity of 2ms-1 relative to the plank until she reaches the end of the plank. The

    asked by Peter on April 7, 2016
  97. Math

    The radius of a disk grows at 2cm/s. Calculate the growth rate of the disks area when the radius mesures 7 cm. (Designate the area of the disk with A and the radius with r) A) Find the relation between A and r B) Find the derivative of this relation on

    asked by Ralph on April 18, 2011
  98. Math

    The radius of a disk grows at 2cm/s. Calculate the growth rate of the disks area when the radius mesures 7 cm. (Designate the area of the disk with A and the radius with r) A) Find the relation between A and r B) Find the derivative of this relation on

    asked by Ralph on April 17, 2011
  99. Physics

    A potter’s wheel is spinning with an angular speed of 4.5 rad/s. When the potter stops working, the wheel slows down with an angular acceleration of -0.5 rad/s 2. Calculate the angle, in radians, through which the wheel has turned by the time its angular

    asked by Jannia on April 22, 2016
  100. Chemistry

    "Energy is released when 100 kg of steam at 150 degrees Celsius and standard pressure changes to water at 60 degrees Celsius. Calculate the total energy change". I used q=mct to find the energy required to change to 100 degrees Celsius. But now what??

    asked by Stuck on February 17, 2010

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
  40. 40
  41. 41
  42. 42
  43. 43
  44. 44
  45. 45
  46. 46
  47. 47
  48. 48
  49. 49
  50. 50
  51. 51
  52. 52
  53. 53
  54. 54
  55. 55
  56. 56
  57. 57
  58. 58
  59. 59
  60. 60
  61. 61
  62. 62
  63. 63
  64. 64
  65. 65
  66. 66
  67. 67
  68. 68
  69. 69
  70. 70
  71. 71
  72. 72
  73. 73
  74. 74
  75. 75
  76. 76
  77. 77
  78. 78
  79. 79
  80. 80
  81. 81
  82. 82
  83. 83
  84. 84
  85. 85
  86. 86
  87. 87
  88. 88
  89. 89
  90. 90
  91. 91
  92. 92
  93. 93
  94. 94
  95. 95
  96. 96
  97. 97
  98. 98
  99. 99
  100. 100
  101. 101
  102. 102
  103. 103
  104. 104
  105. 105
  106. 106
  107. 107
  108. 108
  109. 109
  110. 110
  111. 111
  112. 112
  113. 113
  114. 114
  115. 115
  116. 116
  117. 117
  118. 118
  119. 119
  120. 120
  121. 121
  122. 122
  123. 123
  124. 124
  125. 125
  126. 126
  127. 127
  128. 128
  129. 129
  130. 130
  131. 131
  132. 132
  133. 133
  134. 134
  135. 135
  136. 136
  137. 137
  138. 138
  139. 139
  140. 140
  141. 141
  142. 142
  143. 143
  144. 144
  145. 145
  146. 146
  147. 147
  148. 148
  149. 149
  150. 150
  151. 151
  152. 152
  153. 153
  154. 154
  155. 155
  156. 156
  157. 157
  158. 158
  159. 159
  160. 160
  161. 161
  162. 162
  163. 163
  164. 164
  165. 165
  166. 166
  167. 167
  168. 168
  169. 169
  170. 170
  171. 171
  172. 172
  173. 173
  174. 174
  175. 175
  176. 176
  177. 177
  178. 178
  179. 179
  180. 180
  181. 181
  182. 182
  183. 183
  184. 184
  185. 185
  186. 186
  187. 187
  188. 188
  189. 189
  190. 190
  191. 191
  192. 192
  193. 193
  194. 194
  195. 195
  196. 196
  197. 197
  198. 198
  199. 199
  200. 200
  201. 201
  202. 202
  203. 203
  204. 204
  205. 205
  206. 206
  207. 207
  208. 208
  209. 209
  210. 210
  211. 211
  212. 212
  213. 213
  214. 214
  215. 215
  216. 216
  217. 217
  218. 218
  219. 219
  220. 220
  221. 221
  222. 222
  223. 223
  224. 224
  225. 225
  226. 226
  227. 227
  228. 228
  229. 229
  230. 230
  231. 231
  232. 232
  233. 233
  234. 234
  235. 235
  236. 236
  237. 237
  238. 238
  239. 239
  240. 240
  241. 241
  242. 242
  243. 243
  244. 244
  245. 245
  246. 246
  247. 247
  248. 248
  249. 249
  250. 250
  251. 251
  252. 252
  253. 253
  254. 254
  255. 255
  256. 256
  257. 257
  258. 258
  259. 259
  260. 260
  261. 261
  262. 262
  263. 263
  264. 264
  265. 265
  266. 266
  267. 267
  268. 268
  269. 269
  270. 270
  271. 271
  272. 272
  273. 273
  274. 274
  275. 275
  276. 276
  277. 277
  278. 278
  279. 279
  280. 280
  281. 281
  282. 282
  283. 283
  284. 284
  285. 285
  286. 286
  287. 287
  288. 288
  289. 289
  290. 290
  291. 291
  292. 292
  293. 293
  294. 294
  295. 295
  296. 296
  297. 297
  298. 298
  299. 299
  300. 300
  301. 301
  302. 302
  303. 303
  304. 304
  305. 305
  306. 306
  307. 307
  308. 308
  309. 309
  310. 310
  311. 311
  312. 312
  313. 313
  314. 314
  315. 315
  316. 316
  317. 317
  318. 318
  319. 319
  320. 320
  321. 321
  322. 322
  323. 323
  324. 324
  325. 325
  326. 326
  327. 327
  328. 328
  329. 329
  330. 330
  331. 331
  332. 332
  333. 333
  334. 334
  335. 335
  336. 336
  337. 337
  338. 338
  339. 339
  340. 340
  341. 341
  342. 342
  343. 343
  344. 344
  345. 345
  346. 346
  347. 347
  348. 348
  349. 349
  350. 350
  351. 351
  352. 352
  353. 353
  354. 354
  355. 355
  356. 356
  357. 357
  358. 358
  359. 359
  360. 360
  361. 361
  362. 362
  363. 363
  364. 364
  365. 365
  366. 366
  367. 367
  368. 368
  369. 369
  370. 370
  371. 371
  372. 372
  373. 373
  374. 374
  375. 375
  376. 376
  377. 377
  378. 378
  379. 379
  380. 380
  381. 381
  382. 382
  383. 383
  384. 384
  385. 385
  386. 386
  387. 387
  388. 388
  389. 389
  390. 390
  391. 391
  392. 392
  393. 393
  394. 394
  395. 395
  396. 396
  397. 397
  398. 398
  399. 399
  400. 400
  401. 401
  402. 402
  403. 403
  404. 404
  405. 405
  406. 406
  407. 407
  408. 408
  409. 409
  410. 410
  411. 411
  412. 412
  413. 413
  414. 414
  415. 415
  416. 416
  417. 417
  418. 418
  419. 419
  420. 420
  421. 421
  422. 422
  423. 423
  424. 424
  425. 425
  426. 426
  427. 427
  428. 428
  429. 429
  430. 430
  431. 431
  432. 432
  433. 433
  434. 434
  435. 435
  436. 436
  437. 437
  438. 438
  439. 439
  440. 440
  441. 441
  442. 442
  443. 443
  444. 444
  445. 445
  446. 446
  447. 447
  448. 448
  449. 449
  450. 450
  451. 451
  452. 452
  453. 453
  454. 454
  455. 455
  456. 456
  457. 457
  458. 458
  459. 459
  460. 460
  461. 461
  462. 462
  463. 463
  464. 464
  465. 465
  466. 466
  467. 467
  468. 468
  469. 469
  470. 470