# Questions Asked onNovember 1, 2010

1. ## chem 30

how do you find solubility of Pb(NO3)2, PbCl2, PbCrO4, and PbS

2. ## chemistry

Can someone just get me started on this im not sure of how to go about solving this. The heat of vaporization of carbon disulfide, CS2, at 25° C is 27.2 kJ/mol. 1.00 mol of carbon disulfide vapor condenses to liquid at 25° C. The entropy of this vapor at

3. ## PHYSICS

NEED HELP ON THE ANSWER OF THIS PROBLEM THE EFFICIENCY OF THE PULLEY DECREASES WITH A COEFFICIENT OF FRICTION OF 2.0 THE EFFICIENCY OF THE PULLEY IS 60% WHAT WOULD YOU EXPECT THE EFFICIENCY TO BE IF THE COEFFICIENT OF FRICTION INCREASED TO 0.3

4. ## fraction

complete the following by using the cancellation technique 3/4 x 2/4 x 6/9

5. ## Maths

What is the answer to the following using sicentific calculator 64-1/6

6. ## physics

a 1250 kg car is pulling a 325 kb trailer. The car and trailer have an acceleration of 2,15m/sec2 together. Determine the net force on the ca-trailer combination. What is the net force on the railer?

7. ## Chemistry

1. What is the pH of the solution created by combining 0.50 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? 2. What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first

8. ## enlish

hi i would like to now how to writte more pharagraphs that is what i need help thanks,

9. ## eCONOMICS

Explain how an economist could use the slope of the yield curve to analyze the probability that a recession will occur and why the spread may matter.

10. ## AP Chem

Pretend you are a nuclear scientist and try to answer this bonus question. Uranium -235 (235U) is used as a fuel in nuclear power plants. However, natural uranium contains mostly U -238 (238U) and very little uranium -235. Therefore, it is necessary that

You have recently been hired as a new manager hired into a failing division in a company. The product line is outdated and losing market share, inter-departmental communication is adversarial, and competition for corporate funding is fierce. How are you, a

12. ## physics

A long, straight metal rod has a radius of 4.50 cm and a charge per unit length of 30.0 nC/m. Find the electric field at the following distances from the axis of the rod, where distances are measured perpendicular to the rod. a)3.00 cm b)13.5 cm c)120 cm

13. ## physics

Consider a thin spherical shell of radius 16.0 cm with a total charge of +28.0 µC distributed uniformly on its surface. (Take radially outward as the positive direction.) Find the electric field 10.0 cm from the center of the charge distribution.

14. ## physics

A uniformly charged insulating rod of length 13.0 cm is bent into the shape of a semicircle as shown in the figure below. The rod has a total charge of -7.50 µC. Find the magnitude and direction of the electric field at O, the center of the semicircle.

15. ## chemistry

Calculate the solubility (in grams per 100 mL of solution) of magnesium hydroxide in a solution buffered at pH = 12. I can get the answer in grams per mole, but i am having difficulty changing it to g/100ml.

16. ## Physics

As you approach the I-90 exit in your uncle's little red sports car convertible, you happen to notice a cat crossing the road. Not that you have any particular love of cats (especially this one, whose snooty disposition seems to beckon for a game of

17. ## Accounting

Can someone please help me with this question and break it down into dummy terms I am struggling in this course. Even if you have solid financials, can you obtain more market share?

18. ## Psychology

From Negative Reinforcement University...You're stuck in a dungeon. In each room water is filling to the top but you can choose a button a Triangle or a Circle and if you choose correct a door will open and you can continue to another room (there is a

19. ## history from 1945

explain US relations in East Asia during the 1950s in the larger contextof Early War tensions.(be sure to cover all areas of East Asia)

20. ## math

Find the simple interest of#108,000 for 2 years at 1 and the half percent per annum.pls solve

21. ## math

Find the simple interest of#108,000 for 2 years at 1 and the half percent per annum.pls solve

22. ## psychology

Define sensation and perception. What is the difference between them? Provide an example.

23. ## MAT117

SOLVE ^Y+6-1=4 A) The solution to Y=_ OR B)Solution is not a real number Can't figure this one out... This is what I came up w/ Y=^5

24. ## Chemistry

If 10.0g of Pb at 25.0oC absorbs 1.00kJ of heat, what is it's final temperature?

25. ## MAT117

SOLVE ^Y+6-1=4 A) The solution to Y=_ OR B)Solution is not a real number Can't figure this one out... This is what I came up w/ Y=^5

26. ## Chemistry

given 65g of Zn and 65g of HCl, what is the limiting reactant and reactant in excess in Zn + 2HCl- ZnCl2 + H2

27. ## physics

What displacement must be added to a 50cm displacement in the +x-direction to give a resultant displacement of 85cm at 25 degrees

28. ## physics

A playground carousel (“merry-go-round”) is free to rotate frictionlessly in the horizontal plane (and air resistance is negligible). Without riders, the carousel has a moment of inertia of 152 kg·m2. But there is a single rider, initially standing

29. ## physics

A cannon fires a shell at an angle of 55.0° above the horizontal. The shell has a mass of 17.5 kg, and its initial speed as it leaves the cannon is 289 m/s. The cannon is not anchored to the ground. It is mounted on a base—a large block of wood—which

30. ## fundamentals of accountig

explain clearly the examples of the main items used in the adjusting process

31. ## MB0040

Give a brief note of measures of central tendency together with their merit & demerit which is the best measure of central tendency and why

32. ## IT/236

List three things that a Web designer must consider and understand about the purpose or target audience prior to site development. Why do you feel each of these is important to a successful plan?

33. ## math

the area of a rectangle is 60cm.the length is 11cm more than the width. find the width.

34. ## math

I need help with parametric equations, locus problems, tell me how to solve all questions if you can. Need help with one below: Tangents are drawn to a parabola x^2=4y from an external point A(x1,y1) touching the parabola at P and Q (a) Prove that the mid

35. ## Vectors

45cm at 53 degrees

36. ## algebra

f-g/1 = g/1 How can I make g the subject?

37. ## math

Your younger brother is pulling his sled up a hill. Each minute he moves forward 20 feet but also slides back 3 feet. Describe how you can determine the time he needs to pull his sled 130 feet forward. ANSWER NOW!!!

38. ## sports math

There are many ways to add any numbers 3,5,7,9,11, and 12 to get a sum of 20. Numbers may be repeated.One way to get a sum of 20 is 9+5+3+3. Find four other ways.

39. ## geometry

A figue made from seven identical trepezoids is shown. Find the perimeter of the figue.

40. ## 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

41. ## English

Can you please check if the following statements on the English language are possible? Thank you very much. 1) As for its origin, English is a Germanic language of the Indo-European family. 2)The history of the English language can be traced back (dates

42. ## calculus

Find the points at which y = f(x) = 5x−ln(5x) has a global maximum, a global minimum, and a local, non-global maximum on the interval .1 ≤ x ≤ 2. Round your answers to two decimal places. Global Minimum: (x,y) = (,) Global Maximum: (x,y) = (,) Local,

43. ## calculus

Find the points at which y = f(x) = x8−13x has a global maximum and minimum on the interval 0 ≤ x ≤ 3.7. Round your answers to two decimal places. Global Maximum: (x,y) = (,) Global Minimum: (x,y) = (,)

44. ## calculus

With x people on board, a South African airline makes a profit of (1104 − 3 x) rands per person for a specific flight. A. How many people would the airline prefer to have on board? Answer: x= B. What is the maximum number of passengers that can board

45. ## Physcis - scientifc models and theories.

a) Do you believe that some current accepted scientific models or theories might be held in high regard because of the structure of the scientists who proposed them? b) Suggest on possible model or theory that is currently accepted by a majority of people

46. ## Physcis -wavelets and wavefronts

Describe how the wavelets that form in the wavefront apparently vanish behind it?

47. ## Physics - Sound Energy propagation

Sound, a form of energy can be modeled by using two distinctly different approaches. a) Describe the propagation of sound energy through air by discussing the motion of individual particles. Include possible mathematical equations that might apply. Ans:

48. ## hum 105

a scholarly article that discusses some aspect of the Female Divine in contemporary culture. (This might range anywhere from discussions on goddesses in advertising found in an article on marketing to discussions of feminine principles in contemporary

49. ## geometry

The radius of a circle is 34 meters long,and a chord of the circle is 60 meters long.how far is the chord from the center of the circle?

50. ## algebra

write the partial fraction decomposition of the rational expression ax over x squared -x-2 or ax ____________ xsquared-x-2

51. ## algebra

find all real zeros and their multiplicity of the polynomial function f(x)=5(x-4)squared(x+2

52. ## algebra

state the domain of the function. identify all intercepts and find vertical and horizontal asymtodes. f(x)=x-2 over x+1 or x-2 f(x)= ___ x+1

53. ## University of phoenix mat116

use multiplying by 1 to find expression equivalent to 16/17 with denominator of 102d

54. ## English

1. In Korean culture, the half-moon is a symbol of growth. 2. In Korean culture, the half moon is a symbol of growth. (Are both OK? What about the use of a hyphen between 'half' and 'moon'? And what is the use of 'the' before 'half moon'?))

55. ## English

1. Wine is made from grapes. 2. Grapes are made into wine. (Both are the same, right/) 3. The bridge is made of stone. 4. The bridge is made out of stone. 5. The bridge is made from stone. 6. The bridge is made with stone. (Which ones are grammatical from

56. ## English

1. Rice cake soup is made from sliced long rice cakes. 2. Rice cake soup is made of sliced long rice cakes. 3. Rice cake soup is made with sliced long rice cakes. (Which one is grammatical? Please notice the use of prepositions.)

57. ## spanish

¿Qué _____ a Uds.? a. le falta b. les falta c. le faltan d. nos falta A?

58. ## English

People grow one year older every New Year's Day by eating rice cakes. (What is the meaning of 'grow' in this sentence? What other words can we use instead of 'grow'?)

59. ## English

1. We can massage old people's backs. 2. We can help them use a computer. 3. We can visit their houses and clean rooms. 4. We can take them to a bathroom in wheelchairs. 5. We can help them wash their faces. 6. We can help them take a bath. 7. We can

How do you write -1/9 x^-1 with a positive exponent? also, -5 x^-2 ??

How do you simplify (x^a+b)^a-b / (x^a-2b) ^ a+2b

62. ## logs

How do you solve: log (1/3) 1 ?

63. ## logs 2

How do you solve log(5) 20 + log (5) 10 - 3log(5) 2?

64. ## Richter scale question

An earthquake registers 6.1 on the richter scale. What is the rating on an earthquake twice as powerful? I know: M=I/Io Then what do you do?

65. ## logs 3

How do you create a table to graph log (3/2) x ???

66. ## inverse equation

How is any equation of the form y= -x + b its own inverse?

A 3.00 kg toy falls froma height of 1.00m. What will the kinetic energy of the toy be just before it hits the ground. No air resistance and g=9.81m/s Amswers: 0.98J 9.8 J 29.4 J 294 J I used the formula 1/2 m times v^2 3. times 9.8^2/2 =144. Please

68. ## english

"The editors . . . break those sequences up into quick jagged shots that key us up and keep us hyper-alert . . . we look hard at the screen to take it in." aesthetics? or is it authenticity?

69. ## neg exponents

How do you write: -1/9 x^-1 with a positive exponent? also, -5 x^-2 ??

A population histogram that looks like a trangle means

71. ## Simplify exponents

How do you simplify this equation: (x^a+b)^a-b / (x^a-2b) ^ a+2b

72. ## Global science

A population histogram that looks like a triangle ____. It also means A)the population is rapidly expanding. b) the population is stabilizing.C)a clumped population.d)The population is declining.

73. ## English

Could you please check if the following sentences are all grammatically correct? Thank you. 1) As Coleridge suffered from chronic rheumatism, the doctors prescribed him opium to ease bodily pains and he became addicted to this drug. 2)He distinguished

74. ## Global science

The ajor reason for the dfamatic increase in human population during the last 100 years is ? a)increasing birthrates,B)decreasing birth rates,c)improved daycare for children,d) decreasing death rates

75. ## english

Which of the following topics relate directly to a work's authenticity? 1)believability of characters 2)the appeal of a certain guitar riff 3)sincerity expressed in a love song 4)the likely appeal to all teenagers 5)the way the setting matches the mood of

76. ## chemistry

What is the purpose statement for the lab comparation titrations?

77. ## Chemistry

For Carbon dioxide, for a volume of 500 mL and temperature of 100 degrees celcius, calculate the pressures using the ideal gas law and the van der Waals equation. Explain any dicrepancies in the calculated values. Ideal Gas Equation: Van Der Waals Equation

78. ## english

compare and contrasrt natty bumppo in the prarie and john in the Hospital SKetches.

79. ## Chemistry

Explain why the calculated value for the (1) enthalpy of combustion for propane using bond energies (bond breaking and bond formation)might not be in close agreement to the values calculated using (2) Hess Law and the values calculated using the (3)

80. ## Algebra

factor completely 3y^2-27

Can somebody help me solve this problem? Simplify and evaluate the expression for y = 0, z = -1.5. -0.8z +0.005z(-0.001y - 3.1 + (-1.5z + 3))

82. ## Comm

Write five sentences about the role of education in successful financial planning in the spaces on the following page. Correctly use a different verb tense in each sentence.

83. ## geometry

how many lines of symitery does a delts shape have

84. ## economics

how would a citizen whoose income is in the top one percent talk about scarcity and trade offs?

85. ## Global science

Exponential growth is stopped when______equals. there are no choices and I don't hve an answer. I am learning about Growth and population.My science book is called Global science Earth/ environmental systems science by Kendall Hunt publishing company. It

214. ## college algebra HELP

The population of a city was 166 thousand at the begining of 2004. The exponential growth rate was 1.5% per year. Use the formula P(t)=P[o]e^(kt) where P[o] is the population in 2004 and k is the exponential growth rate. a) predict the population in 2016,

215. ## science

what is sparting?

216. ## statistics

if the mean of a set of data is 23.00 and 10.00 has a z-score of -1.30, then the standard deviation must be?

217. ## Algebra

To convert from centimeters to inches, multiply the number of centimeters by 2.5. True or False?

218. ## physics

A car is traveling at 45.0 mi/h on a horizontal highway. (a) If the coefficient of static friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? ____ m (b) What is the stopping distance when the

219. ## Math: Calculus

A fence is to be built to enclose a rectangular area of 230 square feet. The fence along three sides is to be made of material that costs 5 dollars per foot, and the material for the fourth side costs 15 dollars per foot. Find the dimensions of the

220. ## Physics 11

How much would a 80kg astronaut weigh on Earth? How much would they weigh 500 km above the surface of the Earth? Thank you!

221. ## HIT 105 research paper

I am doing a paper on HIPAA and I need to cite my work. Have the paper finished but I am having problems citing my work. Could someone help me please?

222. ## chemistry

A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) →B(g). The following data are obtained for [ A ] as the reaction proceeds: Time (s) 1 10 20 30 40 Moles of A 0.124 0.110 0.088 0.073 0.054 how do i solve

223. ## curriculum content

which is the oldest art? A.Dram-theater B. photography C. Dance D. music

224. ## chemistry

Two gases are contained in gas bulbs connected by a valve. Gas A is present in a 56 L bulb at a pressure of 213 torr. Gas B exerts a pressure of 683 torr in a 74 L bulb. What is the partial pressure of gas B after they equilibrate once the valve has been

225. ## Networking

I was wondering if when I posted my paper, everyone would help me proof it and help me find references, I've done most of it by memory, and what I would do situations, but I need references. If you would that'd be awesome

226. ## Chemistry

what is the solubility of Pb(NO3)2, PbCl2, PbCrO4, and PbS from highest to lowest

227. ## ap calc bc

hello! what is the derivative e^4 ???? thank you!

how many boxes can you find that will hold two times as many cubes as a 2 by 3 by4 box.record each of the dimensions

229. ## lee senior

what is -2x+y=-4

230. ## statistics

Does the 99 percent confidence interval include the value suggested by the NCAA? Interpret this result.

231. ## MATH

instrctions:graph each linear equation .tell whether it represents a function. 1.) x+y=4 HELP QUICK PLEEZE!!!!!!!!!!!!!!!!!!!!!

232. ## Physics

A father (mF = 83 kg) and his daughter (mD= 43 kg) stand on a flat frozen lake of negligible friction. They hold a 13 m long rope stretched between them. The father and daughter then pull the rope to bring them together. If the father is initially standing

why is the gap between the rich and the poor growing according to Robert Reich in "What happned to the American Social Compact"?

234. ## English

1. I am going to do volunteer work at a cultural center. 2. I am going to do volunteer work at a community center. 3. I am going to do volunteer work at a community cultural center. (Are they all the same? Which one do we have to use?) 4. I am going to do

235. ## English

How does the Scarlet letter A affect Hester Prynne's personality and her thinking concerning the position of women in society?

236. ## physics

A bicycle accelerates from 0.0 m/s to 18 m/s in 4.4 s. What distance does it travel?

237. ## math 116

a. Write an equation in the “y = mx + b” format for the canal that runs through the Toaster Company property. Solve for “m” and “b” in the “y = mx + b” formula. The canal crosses the x-axis at -16 and crosses the y-axis at 3. See the chart

238. ## Science

how do you find the degrees for a pie graph (ex) 1st 19 2nd 15 3rd 20 4th 15 5th 22 6th 15 ??? plz help!

239. ## chem

When the question asks for the qualitative pH of NH3, how would I find the answer?

240. ## Word within the Word Analogy Help

Magnanimous : pusillanimous :: A) reputable:disreputable B) matrilineal:matriarchal C) megaton:megalomania D) creation:devastation Contrapuntal:polyphony:: A) contradictory:disruption B) paradox:orthodoxy C) metrical:poetry D) sangfroid:consanguinity

241. ## Physics

A satellite orbits Earth at a distance of 3rearth above Earth's surface. (Earth mass equals 5.97 X 10^24, earths equatorial radius equals 6.38 X 10^6) How many Earth radii is the satellite form Earths center?

242. ## Physics

Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration? What is the direction of the acceleration in degrees? (Take east to be 0 degrees and

243. ## physics

What would be the weight of 22.0kg dog at the equator on Saturn's surface? (Saturn's mass equals 5.69 X 10^26kg, Saturn's equatorial radius equals 6.03 X 10^7m, Earths mass equals 5.97 X 10^24)

244. ## physics

A satellite orbits Earth at a distance of 3rearth above Earth's surface. (Earth mass equals 5.97 X 10^24, earths equatorial radius equals 6.38 X 10^6) What is the magnitude of the gravitational acceleration of the satellite?

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. I tried looking up on the site, but information there wasn't so clarified.

246. ## world history

I was wondering how to spell Ida Peeiffer I mean like this lady couldn't even find it on the internet how crazy is that.

247. ## dvery

Which economic system is the best solution to handling a crisis of epic proportion?

249. ## physics

A 50-kg astronaut experiences an acceleration of 5.0g (up) during liftoff. What is the astronaut's true weight and apparent weight?

250. ## algebra

a storage bin is shaped like a cylinder with a hemisphere shaped top. the cylinder is 45 inches tall. the volume of the bin is 4131 pi cubic inches. find the radius of the bin. i think [4(pi)r(cubed)]/3=volume of hemisphere and h (pi) r squared volume of

251. ## algebra

sketch the graph of quadratic function. identify vertex and x intercepts f(x)(x-3)squared-1

252. ## English

I need some ideas of novels,songs,comics etc.(preferebly a song) that share similar views as Transcendentalists Here are some views of the Transcendentalists: -Intuition -they think we can understand ourselves through nature. - Individualism(the fact of

253. ## math

sketch the graph of quadratic function. identify vertex and x-intercepts f(x)=(x-3)squared-1

254. ## math

find all real zeros and their multiplicity of the polynomial function f(x)=5(x-4)squared(x+2)

Sodium Vapor lamps emit a characteristic yellow light . What can we deduce about sodium atoms, based on this observation?

256. ## PHYSICS ---HELP!

Suppose there is a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, there is an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2)

257. ## physics

Suppose the elevator now accelerates down- ward at a constant rate of 0.13 g. What is the ratio of the new scale reading to the value W of the scale reading when the elevator is at rest?

258. ## Physics HELP!!! Potentials and Fields

Two identical metal plates with small holes are aligned a distance L=6.7 cm apart. They have a potential difference of 131 Volts. An electron can enter through the hole in the negative plate and exit through the hole in the positive plate. If it enters

259. ## Physics

Two strong magnets on opposite sides of a small table are shown. The long-range attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 23.4 N, the weight of each magnet is 2.67 N, and the magnetic force on

260. ## college

If a tax is placed on the producers of good Y, the consumers of good Y will end up paying the greatest amount of the tax if the elasticity of demand for good Y is Elastic. Inelastic. Unit elastic.

261. ## AP Biology

I have two questions: 1. Why are action potentials usually conducted in only one direction along an axon? A. The axon hillock has a higher membrane potential than the terminals of the axon. B. The brief refractory period prevents reopening of voltage-gated

262. ## HELP i dont get it

The producer of X is contemplating a price change and has asked for your advice. After some empirical investigation, you conclude that the price elasticity of demand for X is 0.75. Your advice to the producer is to Increase price to raise total revenue.

263. ## Math

I don't understand how to solve equations with logarithms very well...can you help please? here is one im stuck on: log (3r+5)= 5 2 Thanks!!

5/9-1/12

265. ## algebra 1

there are 5 rows of pictures with 3/16 inch of vertical space between pictures.Draw a diagram and label all the heights on your diagram then write and solve an equation to find the height of each picture

266. ## tt

how do u write a 10 page essay in 1 hour?

267. ## chemistry

What do the values or R, G, and B mean in terms of the energy of light.

you push a book on a table so that its velocity is constant. If the force you apply is 15 N, what is the force due to sliding friction

269. ## phsyics

Each of the space shuttle’s main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 617 rev/s. A point on one of the blades traces out a circle with a radius of 0.020 m as the blade rotates. (a) What is the

270. ## PHYSICS

A bullet is fired horizonatally at a target 100 m away and hits 0.5 m below the target. what is the velocity of the bullet?

271. ## chemistry

how do you determine what species are present in NH3 soltuion? I don't understand what exactly the species are.

272. ## graphing

How do you graph y= -log (base 5)(-x)? The written question is: Sketch above equation by first describing the transformations performed on the equation y= log (base 5)(x) And what is the inverse function? x=log (base 5)(y)?

273. ## physics

Wiley Coyote has missed the Road Runner once again. This time he leaves horizontally off the edge of the cliff at 25 m/s. If he hits the 400 m from the base of the cliff, how high is the cliff?

274. ## Remembrance day

What does this line from the poem Flander's Fields mean? Take up our quarrel with the foe

275. ## Math

log base 2 (3r+5)= 5

276. ## math

what is the answer to 2/7+3/4=

277. ## General Question

How might a potential employer evaluate your writing if you did not use proper verb tenses? Why? General question, I ned others perspective on to help answer this question. thanks

278. ## Physics

An Alaskan rescue plane drops a package of emergency rations to a stranded party of explorers. The plane is traveling horizontally at 40.0 m/s at a height of 100 m above the ground. a) How far horizontally from the dropping point does the package strike

279. ## Math

What is the answer and how the steps to solving y-15/32=2 6/7

280. ## Algebra II

What is the domain of y = 2/(x) + 2 x>0 x=0 All real numbers except x = 0 I think the domain is All real numbers except x = 0 Is that correct?

281. ## Math

Fireworks are fired at an angle of 82degrees with the horizontal. They are expected to explode about 100 m in the air, 4.8 secs after they are fired. What is the initial velocity of a shell fired from ground level. I think I have to find the vertical and

282. ## Physics HELP!!!

In a classic model, the electron of a hydrogen atom circles the proton at a radius of 0.0529·10−9m when it is in the n=1 state. What is its electric potential energy?

283. ## Chemistry

A chemist wants to make 4.5 L of a 0.310 M CaCl2 solution what mass of CaCl2 (in g) should the chemist use

284. ## chemistry

What are ways of disposing concentrated sulpheric acid?

285. ## Physics

If it requires 7.0 of work to stretch a particular spring by 2.1 from its equilibrium length, how much more work will be required to stretch it an additional 3.7?

286. ## Chemistry

If 4.0 L of a 4.8 M SrCl2 solution is diluted to 50 L , what is the molarity of the diluted solution?

287. ## Chemistry

For the reaction shown, compute the theoretical yield of the product (in grams) Ti(s)+2Fe(g) = TiF2(s) 6.0 g Ti, 6.0g F2

288. ## Physics

Two strong magnets on opposite sides of a small table are shown. The long-range attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 23.4 N, the weight of each magnet is 2.67 N, and the magnetic force on

289. ## help quick pleeze

WITHOUT GRAPHING tell whether each point is on the graph of y=-4x-1. (1/2,-1)

1. What are the primary roles of media delivering news to the public?

350. ## English

For my essay I have to write about a character in Middlemarch by George Eliot and explain how the character is brought to life. How does she (the author) introduce, develop, and represent the character? I'm thinking about writing about Dorothea or

351. ## science

if a thermometer contained a gram of mercury, how much would the volume of the mercury change when the temperature rose from 0 degrees celcius to 30 degrees celcius?

352. ## Math

Latoya has 3/4 of a bag of popcorn. If she eats half of the popcorn at a movie, ho much does she have left?

353. ## math

question is 40x^2 + 23x -30 = 0 reads as 40x squared plus 23x minus 30 equals zero...please help, we have not learned the quadric formula yet so we are finding the numbers that make 30 and add to 23.

354. ## Physics

I solved the following question: "A ball is launched from the top of a 320 m high building at 50 m/s at an angle of 37 degrees to the horizontal. For the first 10 seconds of flight, make a table of the vertical position from the ground versus time similar

355. ## chem

complete this reaction 2 NaNO3 + ht →

356. ## Chemistry- college

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

Suppose that the graph of force vs. time for a very unusual spring has only straight lines. The cart hits the spring at t = 3.00 s, so force F = 0 up to that point. Then, after t = 3.00 s, the force increases linearly until it reaches a maximum at Fmax =

suppose a cart of mass m = 969 g is initial moving at speed v0 = 5.17 m/s. It strikes a spring attached to a fixed wall, comes to a stop, and bounces back at speed vf = 4.48 m/s. Assume the track is frictionless. a) Find the magnitude of the impulse

359. ## arithmetic

is 1/8 in the simpelest form

I don't get how to do this. I'm so lost please help me. Determine the equation of the parabola with roots 2+√3 and 2-√3, and is passing through the point (2,5) this is what i did but its the wrong answer: y= a[x + (2+√3)] [x+(2-√3)] 5= a[2 +

361. ## help me physics

suppose the cart has mass m = 203 g, and it strikes the clay at speed vo = 5.24 m/s and comes to a dead stop. Assume the track is frictionless, and the clay is crushed inward by 1.83 cm. a)Find the magnitude of the impulse exerted by the clay on the cart.

362. ## Finance

Simtek currently pays a $2.50 dividend (D0) per share. Next year’s dividend is expected to be$3 per share. Aft er next year, dividends are expected to increase at a 9 percent annual rate for three years and a 6 percent annual rate thereaft er. a. What

363. ## science need help!

i am doing questions and i just want to say i need help the question says ____________ affects how much moisture is in the air i don't get it

364. ## math

Information related to Hermesch Company for 2011 is summarized below. Total credit sales \$2,200,000 Accounts receivable at December 31 825,000 Bad debts written off 33,000 What amount of bad debts expense will Hermesch Company report if it uses the direct

365. ## Calculus - integration

Q. ¡ò(15^x/3^x) dx i know that the ¡ò(a^x) dx = a^x/lna +c but i don't know how to solve this question. thank you

366. ## chemistry

balance the followig example of a heterogeneous equilibrium and write its reaction quotient, Qc: S8 + F2=SF6 i've balanced it i think i got S8 +24F2 =8SF6 but when i try it it keeps telling me that i'm wrong when i write out the Qc

367. ## chem need assistance

Write a balanced chemical reaction to show the reaction between ammonium and a chlorite? Is this correct? 2NH3 + CLO2 + H2O ⇒ NH4Cl + NH2O2

368. ## Chemistry

The Kc for the reaction below is 4.8 X 10 ^-10. 1/2 N2 +1/2 O2 = NO what is the Kc for the following reaction? 2NO=N2 +O2

369. ## chemistry

How do i find the change in the moles gas for a reaction? example MgCO3 = MgO +CO2

how do you say what is your favorite food in spanish

371. ## science

Animals use the energy found in food to produce _____ and _____.

372. ## chemistry

if A(aq) + B(aq) = AB(aq), and the molarity of A in the solution is 0.60 M and the molarity of B in solution is 0.60M, calculate the enthalpy of the reaction, delta Hrxn, for the formation of 1 mole of AB solution.

373. ## phyics

i need help setting it up to find the answers. (answers included) two masses are connected together by a string which is then hung over a pulley. m1= 7.50 kg and m2= 6.50 kg. before they are released m1 is suspended h= 135cm above the floor while m2 is

374. ## chemistry

if A(aq) + B(aq) = AB(aq), and the molarity of A in the solution is 0.60 M and the molarity of B in solution is 0.60M, calculate the enthalpy of the reaction, delta Hrxn, for the formation of 1 mole of AB solution.

375. ## Algebra

In 1992, the life expectancy of males in a certain country was 71.4 years. In 1996 it was 73.6 years. Let E represent the life expectancy in year t and let t represent the number of years in 1992. E(t)=____t+____ Use the function to predict the life

376. ## Biology

(1)How are the processes and end products of mitosis and meiosis similar? (2) How are the processes and end proucts of mitosis and meiosis different?

377. ## Math

what is 3(x)-6(x) show work please

378. ## physics

In a game of pool, the cue ball strikes another ball of the same mass and initially at rest. After the collision, the cue ball moves at 3.10 m/s along a line making an angle of 27.0° with its original direction of motion, and the second ball has a speed

379. ## ethics

What are some of the consequences of violating a workplace standard?

380. ## math

find the equivalent fractions with the common denominator of 12

381. ## ethics

What are the consequences of violating a societal norm?

382. ## Chemistry

If 36.00 mL of KMnO4 are required to oxidize 25.00 mL of 0.02932 M NaC2O4 solution, what is the concentration of KMnO4?

383. ## algebra urgent !!!!

how to get from step 2 to step 3 1. (x^3 + y^3) + xy(x + y) 2. (x + y)(x^2 - xy + y^2) + xy(x + y) 3. (x + y)(x^2 + y^2) objective: factorization

384. ## Chemistry

how to determine the change in the number of moles of gas in the reaction 2H2 g + O2 g= 2H2Ol i thought it was 2 because the product is a liquid but that isn't correct

385. ## CHEMISTRY

1)If 36 mL of KMnO4 solution are required to oxidize 25 mL of 0.02932 M NaC204 solution, what is the concentration of the solution? 2)A Certain brand of iron supplement contains FeSO4-7H2O with miscellaneous binders and fillers. Suppose 22.93 mL of the

386. ## CHEMISTRY

1)If 36 mL of KMnO4 solution are required to oxidize 25 mL of 0.02932 M NaC204 solution, what is the concentration of the solution? 2)A Certain brand of iron supplement contains FeSO4-7H2O with miscellaneous binders and fillers. Suppose 22.93 mL of the

I need help with this question determine the values in k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros. Check these values in the original equation. i don't get how to do it please help me.

How do you write a mixed number as a decimal such as 1/2 and the whole number 3? Also 3/4 and the whole number 4. Also 1/5 and the whole number 7. Thank you who will may help me!:)

2. You are in the process of a major Spring Clean in your home/bedroom/office/garage. You have identified a variety of new and used items that you are no longer using. With summer around the corner you could use a bit more cash for a little vacation.

390. ## human resources

Does the world have enough natural resources for 8 or 10 billion people to live decent, secure, happy, fulfilling lives? What do those terms mean to you? Try to imagine what they mean to others in our global village.

391. ## math

how long would it take for the investment to triple using this equation: A=3200e^(0.062t) and would i solve this

392. ## ethics

Why do you think employers don't want you to use social networking sites at work? What would be the consequence of dressing inappropriately at your place of work? What would happen if someone did?

393. ## Physics

A 150-g block on the end of a spring with a spring constant of 35N/m is pulled aside 25 cm and released from rest. In the electrical analog the maximum charge on the capacitor is 0.25 C. The maximum current in the LC circuit is:

394. ## english 3

Came to America to find freedom to worship and the Promised Land

395. ## Math

I was given this by my teacher for extra credit 1 _ _ _ _ _ 1 _ the blanks are numbers from 0-9 excluding 1 since it was given. I need to know how many possible combinations are left and if there is a good website that will generate all the combinations.