# Questions Asked onMarch 10, 2012

1. ## 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

2. ## 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

3. ## Ochem

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

4. ## 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.

5. ## physics

a positive charge is moving to the right and experiences a vertical upward magnetic force. In which direction is the magnetic field? to the right to the left out of the page into the page upward

6. ## 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

7. ## 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

8. ## 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

9. ## math

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

10. ## 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)

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

12. ## 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

13. ## 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

14. ## Ochem

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

15. ## 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?

16. ## Chemistry

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

17. ## 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?

18. ## 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
19. ## 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

20. ## 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?

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

22. ## 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)

23. ## 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
24. ## b.law

Over many years, Jake and Jo Bob built up a barbeque ribs business, Hambones, Inc., which caters picnics and parties and sells ribs and corn at county fairs. They have several creditors, including Sauce Supply and First State Bank. Two years ago, in

25. ## 6th Grade Christian History

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

26. ## 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 ?

27. ## 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

28. ## 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.

29. ## 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

30. ## 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

31. ## 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

32. ## 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?

33. ## history

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

34. ## 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?

35. ## 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

36. ## 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)

37. ## 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

38. ## math

An electric post was broken by a strong typhoon.It formed a right triangle with the ground.If a broken part makes an angle of 25 degrees with the other part,and the topmost part of the post which is post which is on the ground is 40 ft from the base,how

asked by NIRVANA RIZA A. GARON
39. ## 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

40. ## 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.

41. ## 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

42. ## Physics

Please help! I've tried several times on my calculator and I can't get it right! 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 1024 kg, radius = 6.38 x 106 m. Find the

43. ## 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!!

44. ## Math

A 10 year old has a heart rate of 210 and a 15 year old has a heart rate of 205 and so on. Right an equation that can be used to find the maximum heart rate for any age. It says the relationship is linear if that helps.

45. ## Algebra

A company produced 2,590,000 small appliances in one year and made a profit of 6,590,000. What was the profit of each appliance? Express the answer in scientific notation in two decimals

46. ## Life orientation

What, according to the basic conditions of employment act applies with regard to the contraventions?

47. ## 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

48. ## 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

49. ## 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?

50. ## 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

51. ## 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

52. ## Math: Limits

Estimate the limit numerically. lim as x→(approaches to)5 6e^(x − 5) How do I solve it? I don't plug in the numbers do I? Then how do I do this as well? What should I do to solve lim x→(approaches to)− infinity 6xe^(7x) Do I disregard the other

53. ## chemistri

what are van der waals forces

54. ## 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

55. ## Physics

a 60 gram tennis ball completed 5 revolutions in 1.68 seconds. given that the radius was 35 centimeters, what haning mass was used

56. ## Literacy

Are there any good literacy sites?

57. ## Algebra

In 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 cigaretts. The percentage, p, of the

58. ## arithmetic

find comparsion as a ratio reduce to lowest term of 47ft and63yd.

59. ## english

how to start an opening paragrph for explaning what love and infatuation means

60. ## Math ?

If p is a positive integer and is greater than 3. How many prime integers are there in 3p including 1 and 3p

61. ## 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?

62. ## Organic Chemistry

How do you synthesize methysulfonyl benzene from Benzene?

63. ## Chemistry

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

64. ## Math ?

If p is a positive integer and is greater than 3. How many prime integers are there in 3p including 1 and 3p

65. ## math

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

66. ## 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!

67. ## Ochem

If 1.43 g of 4-ehoxyaniline and an excess of the acylating agent were used to prepare phencetin, what is the theoretical yield of product?

68. ## 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?

69. ## Math

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

what process do you follow to come to a conclusion

71. ## Circuits

I want to know why is it that a voltage in a capacitor cant change instantaneously and why the current in an inductor cant change instantaneously either. Also, a capacitor stores energy, like a battery, right? Why is it that it can't be used to power, say,

72. ## math

Find the area of some figure which have radius of 42cm and degree60

73. ## math

A rate of 40 percent could be expressed as 2/5.true or false

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

169. ## Math Geometry

given triangle abc, measure of angle b= 120 degrees, ab= 6 units, bc= 10 units, find the area of abc

170. ## math

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

171. ## 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

172. ## physics

two particle with equal mass, one carrying a charge q and the other -2q each enter at right angles to a uniform magnetic field with the same velocity. which is deflected into a circular path with the larger radius?

173. ## 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

174. ## math

a square playground has area of 174 m2 .what is the approximate lenght of each side of the playground?

175. ## calculus

2. Let R be the region in the first quadrant bounded by the graphs of (x^2/9)+(y^2/81)=1 and 3x+y=9 . a. Set up but do not evaluate an integral representing the area of R. Express the integrand as a function of a single variable. b. Set up but do not

176. ## 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.

177. ## Calculus

Find the equation for a line which passes through the points (–1, 1) and (3, –7). Write the equation in slope-intercept form. Show work.

178. ## 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

179. ## 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: ___________

180. ## Calculus

Points (–1, 6) and (–3, 2) are endpoints of the diameter of a circle. (a) What is the exact length of the diameter? (Simplify as much as possible) Answer: ________ (b) What is the center of the circle? Answer: ____________ (c) What is the equation of

181. ## College Physics

(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 9.62 m/s when going down a slope for 4.00 s? (b) How far does the skier travel in this time?

182. ## 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?

183. ## physics

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

184. ## Calculus

Given the function" f(x)=1/4x− 3, find a formula for the inverse function.

185. ## Calculus

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

186. ## Calculus

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

187. ## 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.

188. ## Math

In 1995 the united states recovered 21% of its municiple solid waste through recycling up from 17% in 1990. Let y represent the percentage recycled and let x equal the number of years since 1990. Find the linear function that fits this data.