# Questions Asked onMarch 10, 2012

1. ## math

A town has a population of 32,000 in the year 2002; 35,200 in the year 2003; 38,720 in the year 2004; and 42,592 in the year 2005. If this pattern continues, what will the population be in the year 2016?

2. ## Ochem

Phenacetin has the structure shown below. Write an equation for its preparation starting from 4-ethoxyaniline.

3. ## Ochem

Give two reasons why the crude product in most reactions is not pure.

4. ## statistics

16. Based on tests of the Chevrolet Cobalt, engineers have found that the miles per gallon in highway driving are normally distributed, with a mean of 32 miles per gallon and a standard deviation 3.5 miles per gallon

5. ## chemistry

MnO4–(aq) + Cl–(aq) Mn2+ + Cl2(g) (unbalanced) i. Write the reduction and oxidation half-reactions (without electrons). (.5 point) ii. Balance the equations for atoms (except O and H). (.5 point) iii. Balance the equations for atoms O and H using H2O

6. ## 6th Grade Christian History

1. when he roman government began to persecute Christians under Nero, a) Christianity almost disappeared b) Christians had to cremate their dead c) Jews hid themselves in their homes d) Christianity was outlawed 2. the bishop of Rome was also known by the

7. ## AP Chem

An apparatus consists of a 4 L flask containing nitrogen gas at 32 C and 885 kPa, joined by a valve to a 8 L flask containing argon gas at 32 C and 47.5 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?

8. ## chemistry

Write the balanced equations for the following examples: a) potassium hydroxide + sodium sulfide --> potassium sulfide + sodium hydroxide b) carbon disulfide + oxygen --> carbon dioxide + sulfur dioxide

9. ## Ochem

In the reaction between p-aminophenol and acetic anhydride to form acetaminophen, what was the purpose of adding water to the reaction mixture? There are a couple of possible answers, and this requires a detailed explanation for credit. thanks!

10. ## math quick question

I got a problem that states which graph represents the sequence of 1,2.5,4,5.5,7.. Should the graph start at 1,1 or 0,1?

11. ## AP CHEMISTRY

Calculate the solubility of Mn(OH)2 in GRAMS PER LITER when buffered at each of the following. a)pH 7.4 b)pH 9.2 c) pH 11.5

12. ## chemistry

MnO4–(aq) + Cl–(aq) Mn2+ + Cl2(g) (unbalanced) i. Write the reduction and oxidation half-reactions (without electrons). (.5 point) ii. Balance the equations for atoms (except O and H). (.5 point) iii. Balance the equations for atoms O and H using H2O

13. ## Calculus

A closed box is to be a rectangular solid with a square base and volume of 12 ft^3. Find the most economical dimensions if the top of the box is twice as expensive as the sides and bottom.

14. ## physics

at 3.68100017 kHz the reactance in a circuit of a 9 uF capacitor and an inductor are equal in magnitude. what is the value of the inductor? a. .000020 H b. .000020 mH c. .000021 uH d. .000021 mH

15. ## AP CHEMISTRY

Calculate the solubility of Mn(OH)2 in GRAMS PER LITER when buffered at each of the following. a)pH 7.4 b)pH 9.2 c) pH 11.5

Please explain what is global warming?. And How Do Business Enterprises contribute towards economic growth??? And Please Name Me The Socio-economic issues

17. ## math

a pizza has a circumference of 47.1in. what is the radius

18. ## physics

How much work does a 69 kg person do against gravity in walking up a trail that gains 790 m in elevation

19. ## Statistics

Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the

20. ## physics

A skater of mass 74.5 kg initially moves in a straight line at a speed of 5.10 m/s. The skater approaches a child of mass 37.5 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?

21. ## physics

An iron wire has a cross-sectional area equal to 1.20 10-5 m2. Carry out the following steps to determine the drift speed of the conduction electrons in the wire if it carries a current of 34.0 A. (a) How many kilograms are there in 1.00 mole of iron? 1

22. ## Calculus

The strength of a beam with rectangular corss-section is directly proportional to the product of the width and the square of the depth (thickness from the top to bottom of the beam). Find the shape of the strongest beam that can be cut from a cylindrical

23. ## math

A 1O-m ladder rests againts the wall of a house.The foot of the ladder on the ground is 1.3 m from the wall.What angle does the ladder make with the wall?

asked by NIRVANA RIZA A. GARON
24. ## Algebra

Archaeologists and forensic scientists use the length of of human bones to estimate the height of his/her femur f(the bone from the knee to the hip socket), in centimeters using the following formulas: Male h=69.089+2.238f Female: h = 61.412+2.317f a. a

25. ## statistics

if the average number of textbooks in professors' offices is 16, the standard deviation is 5, and the average age of the professors is 43,with a standard deviation of 8 ,which data set is more variable ?

26. ## Chemistry

The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use

27. ## Physics

A long cylindrical insulator has a uniform charge density of 1.0 #C/m3 and a radius of 9.0 cm. a) What is the electric field inside the insulator at a distance of 4 cm? b) What is the electric field at 17 cm? c) How much work must you do to bring a q =

28. ## Math

Each cube below is made up of smaller cubes, but the large cubes are not solid. They had tunnels through them. • The first cube originally had 27 small cubes, but the tunnel removed 3 cubes. • The second cube originally had 64 small cubes, but two

A zinc-copper battery is constructed as follows at 25 degree C: Zn | Zn2+(0.15 M) || Cu2+(1.70 M) | Cu The mass of each electrode is 250. g. I found the cell potential to be 1.13V and the cell potential after 5.00 A of current has flowed for 8.00 h is

30. ## physics

A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.3 N acts on it for a distance of 0.5 m

31. ## PHYSICS

Determine the value for the acceleration due to gravity at the surface of the planet Mars, given the following data: Mass of Mars = 6 .42 x 10^23 kg Radius of Mars = 3.37 x 10^6 m Thanks!

32. ## math

explain how to find ans. a clock has a circumference of 166cm. what is the diameter

33. ## Physics

The pulley system shown in the figure is used to lift a 52-{\rm kg} crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. The crate is rising with an acceleration of 2.5 m/s^2.

34. ## physics

An ion enters a mass spectrometer which has a .18 T field perpendicular to? an electric field of 1.6 kV/m and selects a velocity. the same magnetic field is then used to deflect the singly charged ion into a circular path of radius 12.5 cm. a. what

35. ## math

Which is the eighth term in the sequence an=-1/125(5^n-1)

36. ## Physics (dynamics)

A 47.0 kg slab rests on a frictionless floor. A 18.0 kg block rests on top of the slab. The static coefficient of friction between the block and the slab is 0.50, while the kinetic coefficient of friction is 0.40. The top block is acted upon by a force of

37. ## Chemistry

If Kc = 0.480 at 40.°C and Kc = 0.630 at 90.°C, what is ΔH° for the reaction? XY

38. ## math

A 35-foot long ladder is leaning against the wall of a building.How far from the ground is the top of the ladder and how far from the base of the building is its foot if it makes a 20 degrees angle with the wall?

asked by NIRVANA RIZA A. GARON
39. ## physics

Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1820 N on the rope, what is the maximum speed (in meters/second) he can tolerate at the lowest point of his swing? His mass is 83.0 kg,

40. ## Calculus

A can of soda at 80° F. is placed in a refrigerator that maintains a constant temperature of 36° F. The temperature T of the soda t minutes after it is placed in the refrigerator is given by T(t) = 36 + 44 e^–0.058 t Find the temperature of the soda 10

41. ## 6th Grade Christian History

Why were the Christians persecuted by the Romans? At first I thought it was because they didn't believe in God. But then I had the question "to the Romans what was appealing about Christianity? What did they like about the teachings?" Please help!! I am

42. ## Chemistry

Write the balanced equation for the double replacement reaction of: Barium chloride and Sulfuric acid

43. ## english

What is the underlying message of all of Arthur Jarvis’s writing? How does reading his son’s writing affect the behavior of James Jarvis?

44. ## physics

An RLC circuit has voltage supplied to it at a frequency of 13.0 kHz with a phase difference between the current and the voltage of magnitude 0.20 rad. If the circuit has a capacitance of 5.0 µF and an inductance of 0.050 H, find the resistance of the

45. ## math

solve the system 7x^2 - 5y^2 + 20y = 3 21x^2 + 5y^2 =209

46. ## math

17. Burger King's Drive-Through: Suppose that cars arrive at Burger King's drive-through at the rate of 20 cars every hour between 12:00 noon and 1:00 PM. A random sample of 40 one-hour time periods between 12:00 noon and 1:00 P.M. is selected and has 22.1

47. ## math

A 35-foot long ladder is leaning against the wall of a building.How far from the ground is the top of the ladder and how far from the base of the building is its foot if it makes a 20 degrees angle with the wall?

48. ## 6th Grade Christian History

Why did Christian church come to be ruled by hierarchy? Any and all help is appreciated. ☺♦☻

49. ## PHYSICS

Determine the value for the acceleration due to gravity at the surface of the planet Mars, given the following data: Mass of Mars = 6 .42 x 10^23 kg Radius of Mars = 3.37 x 10^6 m Thanks!

50. ## Chem

Why do the rate of reaction for a reversible reaction slows down at equilibrium stage.

51. ## physics

a ball is thrown at an angel of 40 degee above tghe horizontal.the ball clears the fence whis is 85 metre away.what is the inital velosity of the ball if we assume the ball is thrown at the same elevation of the fence

The measurement of pH using a glass electrode obeys the Nernst equation. The typical response of a pH meter at 25.00 degrees C is given by the equation: E(measured)= E(ref) +.591pH where ref contains the potential of the reference electrode and all other

53. ## biology:plz someone help

The heart lung machine is used so that surgeons can operate on the arteries supplying heart muscle. These arteries may be diseased. (a) Name these arteries and explain how they may become diseased. (b) suggest why a patient is put on a heart lung machine

54. ## Calculus

A cicular metal plate is being heated and expands so that its radius increases at the rate of 0.25 mm/min. How fast is the area increasing when the radius is 10 cm?

55. ## calculus

A projectile is launched from a platform 20 feet high with an initial velocity of 72 feet per second, The height h of the projectile at t seconds after launch is given by h = –16t2 + 72t + 20 feet. (a) How many seconds after launch does the projectile

56. ## Calculus

Bob, a resident of Metropolis, pays Metropolis an annual tax of $50 plus 1.9% of his annual income. If Bob paid$2,387 in tax, what was Bob's annual income?

57. ## HELP! College Physics

A skateboarder shoots off a ramp with a velocity of 6.7 m/s, directed at an angle of 59° above the horizontal. The end of the ramp is 1.1 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the

58. ## Precalculus

Use one of the identities cos(t + 2πk) = cos t or sin(t + 2πk) = sin t to evaluate each expression. (Enter your answers in exact form.) (a) sin(19π/4) (b) sin(−19π/4) (c) cos(11π) (d) cos(53π/4) (e) tan(−3π/4) (f) cos(π/4) (g) sec(π/6+ 2π)

59. ## Calculus

The total charge in an electrical circuit as a function of time is given by q=t/(t^2+1) coulombs. Find the maximum charge of q.

60. ## Calculus

Two ships are leaving port at the same time. The first ship is sailing due east at 20 km/hr and the other due north at 15 km/hr. How fast are the ships moving away from each other 2.0 hr later?

61. ## Calculus

Suppose that sin q = − 12/13 and that q is a Quadrant IV angle. (a) Find the exact value of cos q. Show work. (b) Find the exact value of sin 2q. Show work.

62. ## Calculus

Given y = 5 sin(6x – pie), state the (a) period (b) phase shift

63. ## PHYSICS

Find the force of attraction on a 3 kg mass at the surface of a planet given the following information about the planet: mass = 5.98 x 10^24 kg, radius = 6.38 x 10^6 m. Find the force if the radius is doubled to 12.76 x 10^6m Thanks!!

Which Represent the first two terms of the sequence a1=2 and an=-2(an-1)^2 2, -8 -8,-128 16,1024 -2,16

65. ## algebra

Which is the eighth term in the sequence an=-1/125(5^n-1)

66. ## Physics

A mass sits at the top of a 2 meter long ramp inclined at an angle of 30 degrees (to the horizontal). When the mass is released, it slides down the ramp and then onto a level floor. If both the ramp and the board have a coefficient of .25 (Friction), how

67. ## Physics

A mas of 100 Kg hangs from a cable secured to a steel pole and supported by another cable as shown below. Find the tension (T) in the support cable and the force (F) on the steel pole.

68. ## 3 D - geometry (direction of cosines)

Find the angle between the lines between the lines whose direction cosines satisfy the equations l + m + n = 0 and 2mn + 3nl - 5lm =0.

69. ## Math

This problem pertains to Cuisenaire Rods: 1-white 2-red 3-green 4-purple 5-yellow 6-dark green 7-black 8-brown 9-blue 10-orange Question: (a) If an all-brown train is equal in length to an all-orange train, what can be said about the number of brown rods

70. ## math

what are the equivalent fractions for 7/20

71. ## Math

y= sqrt(81-x^2) What length and width should the rectangle have so that its area is a maximum? (smaller value) (larger value)

72. ## Calculus

Water reaches its maximum density above its freezing point. The volume V (in cubic diameters) of 1 kg of water at temperature T between 0 degrees C and 30 degrees C can be approximated by the formula V=999.87 - 0.06426T + 0.0085043T^2 - 0.0000679T^3. Find

73. ## Algebra I

The width of a rectangle is fixed at 7 cm. Determine (in terms of an inequality)those lengths for which the area will be less than 161 cm2.

74. ## math

(4.35E-2 - x)(7.56E-2 -x ) ============================ (0.324 + 2x)2 Rearrange to get an expression of the form ax2 + bx + c = 0 and use the quadratic formula (solve for x. This gives: x = 1.05E-2, 0.143 basically i understand they use the quadratic

75. ## Math

Which represents the type of sequence: 12, 22, 30, 36, 41, …? neither arithmetic nor geometric both arithmetic and geometric arithmetic geometric

76. ## Math

Mr. Rogers wants to fence in a rectangular garden next to a straight section of the Scioto River. He has 330 feet of fencing to do the entire job. He doesn’t need fencing along the river, and there is a 4.5 foot wide clearance for a gate at one end. What

77. ## biology:plz help

state the name for the action of two oppposing miscles, such as the biceps and the triceps.

78. ## physics

A small plane mass 600 kg lifts off from the runway at a speed of 145 Km/Kr. 2 Minutes later, the plane has reached an altitude of 300 meters and its airspeed has dropped to 90 Km/Hr. Assume the power output of the engine was constant during this time.

79. ## A A U

How can i write a seminar report on Eutrophication

80. ## science

: Describe how bacterial fermentation causes milk to sour.

81. ## calculus

A tank consists of a right circular cylinder at height (h)surmounted by a hemisphere at a radius (r) with an outlet atthe top. The tank is full of water at density ρkg/m3. Find the work required to empty thetank.

82. ## Math - HELP !

there are 50 students in the seventh grade , 62 percent of these students are involved in the drama club.how many seventh grade students are in the drama club ?

83. ## Math

simplify: 22/sqr18 + sqr7

84. ## Math

Find the points of inflection of the graph of the function. (If an answer does not exist, enter DNE.) f(x) = 1/3x^4 + 4x^3 for some reason I am not getting the right answer; I got the graph on my calculator but it seems weird.

85. ## algebra

There is a 100 point test with 38 questions. The test has 2 point questions, and 5 point questions. How many 5 point questions and 2 point questions are there?

86. ## college Math

perform the indicated operation, give answer in scientific notation. (5x10^2)x(5.6x10^4)

87. ## Chemistry: Identifying Substances

Hi! I would like to know the definitions for... ELEMENT: something on the periodic table? COMPOUND: molecule with at least 2 different elements? SYMBOL: i'm confused about this FORMULA: i'm confused about this ATOM: smallest units of elements? MOLECULE: a

143. ## physics

an RlC circuit has a resistance of 4 kOhm, a capacitance of 33 uF, and an inductance of 23 H. if the frequency of the alternating current is 2/pi kHz, what is the phase shift between the current and the voltage.

144. ## Literacy

10. Use one of the sources available in the Almanacs and Yearbooks section to identify the approximate time of sunrise in Anchorage, Alaska, on December 25, 2015. A. 10:15 A.M. B. 9:45 A.M. C. 11:30 A.M. D. 8:10 A.M. ANSWER IS A

145. ## English

Here are some more sentences I really need you to check. Thank you. 1) His work (better job) consists in changing the words of the news as the Party wants to, in order to control people. 2) The party aims to eradicate individuality. The information

146. ## Literacy

2. Utilizing the publication search function on EDSeek's Home page, which of the following companies publishes Pediatric Nursing? A. Royal College of Nursing Publishing Company B. Elsevier Science Publishers C. Jannetti Publications, Inc. D. Advanstar

147. ## Literacy

7. Which search engine would be best to use when you want to know if your local library carries a particular journal? A. Worldcat B. Webarchive C. All the Web D. Google Scholar ANSWER IS A

148. ## Algebra

n 1966, the U.S. Surgeon General's health warnings began appearing on cigarette packages. Data gathered after 1965 indicate that public awareness of the health hazards of smoking has had some effect on consumption of cigarettes. The percentage, p, of the

149. ## chemistry

Fuel oil and bitumen is 38% in demand Petrol and Naptha is 27% in demand Diesel is 23% in demand. A question asks: Why are these fractions in demand? I am not sure how to answer this questions and please advise me to how to answer this question. Thanks in

150. ## chemistry

What must be known for the rate constant to be calculated from the rate law?

151. ## chemistry

if i have 5.6 liters of gas in a piston ata pressure of 206 kPa and compress the gas until its volume is 4.8L, what will the new pressure inside the piston be? how do i that problem?

152. ## physics

An electron is a subatomic particle (m = 9.11 x10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.11 x 105 m/s to a final velocity of 1.67 x 106 m/s while traveling a distance of

153. ## history

Which U.S. Supreme Court decision made it illegal to achieve diversity through the use of racial quotas?

154. ## social studies

I need help figuring out 2 things that help creat a nation that are good for the nation capish

155. ## biology

can toads are considered a pest in australia are there anyways that they can adapt to their surroundings without the food chain being damaged

156. ## precalc!!!!!

The point (5,-2) lies on the graph of y=f(x), and assume f^-1(x) exists. Find the corresponding point on eAch graph. A). Y=f^-1(x) I get (-5,2) B). Y=-f^-1(-x)+4 I get (5,2) C). Y=f^-1(x+2)+3 I get (-7,5) Did I get these right?

157. ## Pre Calculus

Use one of the identities cos(t + 2ðk) = cos t or sin(t + 2ðk) = sin t to evaluate each expression. (Enter your answers in exact form.) (a) sin(17ð/4) (b) sin(−17ð/4) (c) cos(17ð) (d) cos(45ð/4) (e) tan(−3ð/4) (f) cos(7ð/4) (g) sec(ð/6+2ð)

158. ## science

: A medical microbiological lab report indicates that a sample contained a biofilm, and that one species in the biofilm was identified as Neisseria gonorrhoeae. Is this strain of Neisseria likely to be pathogenic? Why and why not?

159. ## geometry

In the accompying diagram of circleo, diameter ad,chord AE,ans secantsCAB and CDE are drawn ; m angle BAD=40;and m arch AE=5((m arch ED) what is the measure of ACE?

160. ## science

An electron micrograph of a newly discovered cell shows long projections with a basal body in the cell wall. What kind of projections are these? Is the cell prokaryotic or eukaryotic? How might this cell behave in its environment because of the presence of

161. ## MICRO

Some bacterial toxins cause cells lining the digestive tract to secrete ions, making the contents of the tract hypertonic. What effect does this have on patient’s water balance?

162. ## SCIENCE

How are photophosphorylation and oxidative phosphorylation similar? How are they different?

163. ## math

In a clinical trial, a drug used to relieve pain caused side effects in 9% of the patients who took it. For a new trial, three patients were selected at random. Find the probability that none of those patients had side effects.

164. ## science

3 Some bacterial toxins cause cells lining the digestive tract to secrete ions, making the contents of the tract hypertonic. What effect does this have on patient’s water balance?

165. ## SCIENCE

Describe how bacterial fermentation causes milk to sour.

166. ## SCIENCE

How are photophosphorylation and oxidative phosphorylation similar? How are they different?

167. ## science

How are photophosphorylation and oxidative phosphorylation similar? How are they different?

169. ## Physiology (reproduction)

if only one sperm penetrates into the zona pellucida of the ovum n other sperm which try to bind to the ovum are prevented from binding by the cortical granules secreted by exocytosis than what happens in Sextuplet? please give a detailed explanation.

170. ## English

I need your help to check these sentences, Writeacher. Thank you very much in advance. 1) Winston's face is ruddy for the low quality soap and blunt razor blades he uses. 2) His face is ruddy for the use of low ..(Which one is best?) 3) Everything seems

171. ## chemistry

what is the pH and pOH of a soution with a volume of 5.4 that contains 15 grams of HCl and 25 grams of nitric acid

172. ## Physics

An asteriod is found a distance from the sun equal to 32 units times the earth's distance. What will be the length of time in years required for this asteriod to make one revolution around the sun?

173. ## English

I still have some more corrections I'd like you to check. Thank you. Please, I really need you help! 1) Because of Eton's restrictive moral code he became more and more strong-minded. He chose Orwell from the name of the river he liked. 2) He changes the

174. ## Marketing

Identify a firm in any industry operating and discuss the segmentation strategies for it's product

175. ## rosemont

a pizza was sliced 10 pieces. bill ate 2/10 of the pizza how much of the pizza was left?

176. ## math

In a clinical trial, a drug used to reduce blood pressure caused side effects in 6% of the patients who took it. For a new rial, two patients were selected at random. Find the probability that both the patients had side effects.

177. ## math

how do you find the area of 5 5/8 and 2 7/8?

178. ## matrh

what are the equivalent fractions for 9/8

179. ## accounts

January 1,07 S.Henry sales ledger appear D Fung $200 and C Manley$120.On february 1 Henry accept $150 from D.Fung and march 10, C.Manley was declared bankrupt.a payment of 30cent in$ was receive in full settlement. Show how these would appear in Henrys

180. ## statistics

Just wondering if someone is able to give instructions as to how to go about this questions? As part of a large research project, a social psychologist develops a measure of global environmental attitudes (i.e., general attitudes towards the environment).

181. ## Math

How many positions would be needed to represent 57^10,001 in ordinary decimal notation. Thanks!

182. ## statistics

1. A test has a mean of 50, standard deviation of 10. A. What scores separate the middle 25% from the rest b. What proportion would be expected to score between 45 and 55 c. What proportion would be expected to score 68 and above

183. ## math

y = 40 + (x - 600)*0.35 y = 50 + (x - 600)*0.10 what are the steps to get the answer

184. ## physics

a magnetic field goes from the top to the bottom of this page. what direction will a proton moving diagonally from the upper left to the lower right deflect? Assuming paper lies flat. a.downward b.upward c.left d.right

185. ## Calculus

Let f (x) = 5x^2 – 9 and g(x) = x – 3. (a) Find the composite function ( f o g)(x) and simplify. Show work. (b) Find ( f o g)(2) . Show work.

186. ## Calculus

For the parabola given by (y – 3)^2 = 8(x + 5), find the following: (a) direction parabola opens (to the left, right, up, or down) Answer: ___________ (b) vertex Answer: ___________ (c) focus Answer: ___________

187. ## Calculus

(a) State the reference angle associated with 265°. (b) Convert 265° to radians. Leave the answer in terms of pie .

188. ## Managerial accounting

I have homework in managerial accounting, textbook by Atkinson 6edition. Problems, 10-59, 10-68, 11-68 and case 11-73. Pages; 446, 450, and 504. Thank you.