# Questions Asked onSeptember 22, 2010

1. ## Chemistry

A mixture of CuSO4 and CuSO4·5 H2O has a mass of 1.235 g. After heating to drive off all the water, the mass is only 0.830 g. What is the mass percent of CuSO4·5 H2O in the mixture?

2. ## chemistry

what is the density of an 84.7g sample of an unknown substance if the sample occupies 49.6cm3? what volume would be occupied by 7.75g of this same substance? PLEASE help need the answer tonight i have a test tomorrow i kind of not understand the second

3. ## Physics

Fox sees a piece of carrion being thrown from nest and rushes to it. Nest is 14.0 m high and carrion is thrown with a horizontal velocity of 1.5m/s. Fox is 7.0 m from the base of tree. What is magnitude of fox's average velocity if it grabs carrion in its

4. ## physics

as the shuttle bus comes to a sudden stop to avoid hitting a dog, it accelerates uniformly at -4.1 m/s to the 2nd power as it slows from 9.0m/s to 0.0 m/s. find the time interval of acccelaration for the bus

5. ## Chem

Why can't the water displacement method be used to find the volume of all solids?

6. ## physics

A shotputter throws the shot with an initial speed of 15.5 m/s at a 32.0 degree angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.20 m above the ground.

7. ## physics

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 True False The magnitude of V3 can be -3.0 m/s The x-component of V3 can be

8. ## physics

A ball is thrown horizontally with an initial velocity of 20.0 m/s from the edge of a building of a certain height. The ball lands at a horizontal distance of 82.0 m from the base of the building. What is the height of the building?

9. ## physics

A projectile is launched from ground level to the top of a cliff which is 195 m away and 155 m high. If the projectile lands on top of the cliff 9.2 s after it is fired, find the initial velocity of the projectile (magnitude and direction). Neglect air

10. ## college chemistry

a)What is the mass of heavy water D2O produced when 5.20g of O2 reacts with excess D2? b)What is the mass of water H2O,produced when 5.20g of O2 reacts with excess H2 Consider the reaction 2D2+O2->2D2O Can someone step me through this?

11. ## the writing process

A trip to the ocean can be a relaxing escape from everyday pressures of life.A sailboat glistening on the horizon provides a mental escape to faraway places.The rhythm of the ocean beating against the sand is sedating music to a troubled mind.A slow,gentle

12. ## Physics

a long jumper jumps 10m and leaves the ground at an angle of 45 degrees.determine the speed he leaves the the ground at,

13. ## physics

an automobile with an initial speed of 4.30 m/s accelerates uniformly at the rate of 3.00m/s^2. fine the final speed and the displacement after 5.00s

14. ## Math

In Wilbur's math class, his grade is based on the average score of six tests, each worth 100 points. Wilbur always worries about his grade. He knows that his average on the four first tests is 88.5. What is the lowest average he could get on his next two

what is 5c=2/3 divided by 2/3

16. ## physics

Responding to an alarm, a 100 kg, a fireman slides down a pole to the ground floor, 3.1 m below. The fireman starts at rest and lands with a speed of 3.8 m/s. Find the average force exerted on the fireman by the pole. Find the average force exerted on the

17. ## CHEM

Calculate the mass of silver chloride required to plate 185 of pure silver.

18. ## english

read the following sentences and underline each word or phrase that signals a comparison or contast clue. circle comparison or contrast, depending on the clue. then write the meaning os each italicized word. 1.) We thought we were seeing the real painting,

19. ## Chemistry 1145

These UV photons can break chemical bonds in your skin to cause sunburn—a form of radiation damage. If the 310 nm radiation provides exactly the energy to break an average chemical bond in the skin, estimate the average energy of these bonds in \rm

20. ## Chemistry 2

The pH of a 0.175 M aqueous solution of a weak acid is 3.52. What is Ka for this acid ?

21. ## calculus

The US inflation rate had been 3.5 % per year and the Argentinian inflation rate had been 36 % per month. (a) What is the yearly equivalent of Argentina's 36 %monthly inflation rate? (b) What is the monthly equivalent of the US 3.5 %yearly inflation rate?

22. ## accounting

Jones Company is authorized to issue 20,000 shares of no-par, $5 stated-value common stock and 5,000 shares of 9%, 100 par preferred stock. It enters into the following transaction: 1. Accepts a subscription contract to 7,000 shares of common stock at$42

23. ## ap chemistry

What is the molar mass of glucose, C6H12O6?

24. ## Physics

Consider the system of capacitors shown in the figure below (C1 = 5.00 µF, C2 = 7.00 µF). Find the equivalent capacitance of the system. Find the charge on each capacitor. Find the potential difference across each capacitor. Find the total energy stored

25. ## physics

A 48 kg skier skis directly down a frictionless slope angled at 5° to the horizontal. Assume the skier moves in the negative direction of an x axis along the slope. A wind force with component Fx acts on the skier. (a) What is Fx if the magnitude of the

26. ## math

How many different ways can you make change using 25-cents coin using dimes, nickels and pennies?

27. ## sociology

My assignment is about reading "Sociology as an individual pastime"( Peter L. Berger) and summarizing it. I have read it again and again for many times, but I still don't understand it clearly. Please help me

28. ## biology (multiple choice!)

The death by bubonic plague of about 1/3 of Europe's population during the fourteenth century is a good example of: A. Abiotic factors limiting population size B. A density dependent effect C. A time lag D. A density-independent effect E. Carrying capacity

29. ## math

Kay is making beaded belts for her friends from 6.5 meters of cord. One belt uses 0.625 meter of cord. How many belts can she make?

30. ## Chemistry 2

Which solution will have the lowest pH ? A. .10 M HCN B. .10 M HNO3 C. .10 M NaCL D. .10 M H2CO3 E. .10 M NaOH

31. ## world history

In what direction did Homo erectus migrate from Kenya in east Africa to Indonesia

32. ## 465465

A satellite is orbiting the earth just above its surface. The centripetal force making the satellite follow a circular trajectory is just its weight, so its centripetal acceleration is about 9.81 m/s2 (the acceleration due to gravity near the earth's

33. ## physics

The determined Wile E. Coyote is out once more to try to capture the elusive roadrunner. The coyote wears a new pair of Acme powered roller-skates, which provide a constant horizontal acceleration of 13 m/s2. The coyote starts off at rest 50 m from the

34. ## MAth

Round to the nearest hundred and the nearest tenth. 625

35. ## college chemistry

given 3.650 l of a 1.75 M solution, what mass of calcium chloride is needed to prepare?

12.0 g of carbon reacts with 32.0 g of oxygen to form 44.0 g of Co2. if we react 20.0 g of oxygen with 20.0 g of carbon,how many grams of carbon will be used up?..... i have no clue where to start... can u just tell me the steps to solve similar problems

37. ## Math

Convert from base 10 to the indicated base. 2500 to base 14 I got CA8 to the base of 14. Is that correct?

38. ## Math

What is a pattern rule 74, 148, 222, ..., 370

39. ## Chemistry 11

12.0 g of carbon reacts with 32.0 g of oxygen to form 44.0 g of Co2. if we react 20.0 g of oxygen with 20.0 g of carbon,how many grams of carbon will be used up?..... i have no clue where to start... can u just tell me the steps to solve similar problems

40. ## math

Which point on the circle x^2+y^2-12x-4y=50 is closest to the origin? Which point is farthest from the origin? Explain.

41. ## science

Are Saturn rings made of ice

42. ## Science

calculate the density of 50.0 mg of a gas which occupies a volume of 0.0064 L.

43. ## math

(7x+1)=(10x-23) what measure of

44. ## math gr.6

Between 20 and 28 students signed up for the chess club.The students could not be divided exactly into groups of 2,3,4, or 5. How many students signed up for the chess club? Show your work. Please, help. Thanks.

Homework Help Forum: Algebra-Please help-I'm confused Posted by Tom on Tuesday, September 21, 2010 at 8:09pm. This deals with quadratic functions-If I have a graph with h = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the

46. ## math

Tyrell says $750 is about$800.Sara says $750 is about$700.who is correct?explain.

47. ## Math

If the ratio of girls to boys on the swim team is 2:3, which of these shows the possible number of girls to boys: A. 20 girls, 35 boys B. 24 girls, 36 boys

what is a doctor's responsibility if a patient requests restrictions on the use of his or her PHI?

49. ## physics

in a experiment to detrmine the acceleration of free fall 'g' a student attached a length of ticker tape to a metal ball. when the ball was released it fell to the ground pulling the tape through a ticker timer that printed 50 dots per second on the tape.

50. ## math

What is the pattern to this sequence? 1,3,4,7,11,18,29 I figured it was plus the last 2 numbers which will then equal the next number. But I got messed up and can't figure the next 3 numbers in this pattern, any help is helpful. THanks

51. ## phsics

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 49.3° above the horizontal, and with a speed v = 25.8 m/s. Assuming

52. ## physics

A student bikes to school by traveling first d_N = 1.10 {miles} north, then d_W = 0.500 {miles} west, and finally d_S = 0.200 {miles} south. If a bird were to start out from the origin (where the student starts) and fly directly (in a straight line) to the

53. ## Sociology college

Hello ! I need you help my homework By a narrow margin, Dr. Moreau was recently elected chair of the largest academic department are Faber College She has appointed faculty members who are loyal to her and support her views t o the most influential and

54. ## physics

After a golf ball is hit it takes off with an initial speed of 22.0 m/s and at an angle of 38.0° with respect to the horizontal. The golf field is flat and horizontal. Neglecting air resistance how far will the golf ball fly?

55. ## math

a square foot tile has a decorative line connected the diagonal corners. If the sides of the tile are 12 inches, what is the length of the diagonal to the nearest tenth?

56. ## Biology

Is cyanobacteria cocci, spirilla, or bacilli shaped?

57. ## honors math 7th grade

its a venn diagram three circles. Here is the question. A study was made of 200 students to determine what tv shows they watch. 22 students hated all star trek shows. 73 students watch only the next generation(TNG) 136 students watch TNG. 14 students watch

58. ## physics

A shopper pushes a 8.0 kg shopping cart up a 13 degree incline. Find the magnitude of the horizontal force, needed to give the cart an acceleration of 1.25 m/s^2.

59. ## Chem

A block of metal has a width of 3.2 , a length of 17.1 , and height of 4.8 . Its mass is 1.2 . Calculate the density of the metal.

60. ## college algebra

The height of an object thrown upward with an initial velocity of 96 feet per second is given by the formula h = -16t2 + 96t, where t is the time in seconds. How long will it take the object to reach a height of 144 feet?

61. ## math/ physics

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed? If this speed were increased by just 5.0%, how much longer would the jump be?

62. ## Physics-Mechanics

A pulley is massless and frictionless. 3 kg, 2 kg (on the left), and 6 kg (on the right) masses are suspended What is the tension T1 in the string be- tween the two blocks on the left-hand side of the pulley? Can I solve this like if it was two masses? My

63. ## algebra

The formula for the height of a fallinis shown below, where h is the height of the object in meters, t is the time in seconds, and k is the height, in meters, from which the object began its fall. h=-4.9f+k If aq rock is droppped from a building that is

64. ## Physics

I have a question An airplane is flying at 120km/h due west moves into a region where the wind is blowing at 40km/h. If the planes original velocity is Vplane, what is the expression for the plane's resulting velocity in terms of V plane? Answers are given

65. ## Spanish for Whitney

Here's the answer from yesterday: spanish1 homework check - SraJMcGin, Tuesday, September 21, 2010 at 4:58pm 1. son las, etc. To show you how to make accent marks with the computer I need to know 2 things. a) do you have a MAC or a PC and b) do you have

66. ## Physics - Inelastic Collisions

The speed of a pitched baseball is 46.0m/s. You want to know how fast is your school's star baseball pitcher could throw. You make a pendulum with a rope and a small box lined with a thick layer of soft clay, so that the baseball would stick to the inside

What is the communitive property.

68. ## physics

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed? If this speed were increased by just 5.0%, how much longer would the jump be? I came up with a take off speed of 27.4 but the system

69. ## Physics-Mechanics

horizontal surface. The block is connected by a cord passing over a pulley to another block of mass 5.53 kg which hangs in the air, as shown on the following picture. Assume the cord to be light (massless and weightless) and unstretchable and the pulley to

choose the most effenctive thesis sentence from the following: a. i leared a valuable lesson. or b. life is full of valuable lesson. or c. the saying "Honesty is the best policy" is a valuable life lesson. or d. valuable lesson important in life.

71. ## biology

what happens to proteins dissolved in water when you heat it to 100 degrees

72. ## physics

If a stone is thrown vertically up in a moving lorry,where will the stone fall? Explain.

73. ## Physics

A uniform electric field of magnitude 395 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.40 cm. What is the work done by the field on the electron? What is the change in potential energy

74. ## chemistry

What volume for 1.5M KCl solution must be used to prepare 500. mL of a .550 M KCl solution? I need the set up

75. ## Statistics

A manufacturer makes two models of an item: model I, which accounts for 80% of unit sales, and model II which accounts for 20% of unit sales. Because of defects, the manufacturer has to replace (or exchange) 10% of its model I and 18% of model II. If a

76. ## sport

How do i explain the effect of air resistance on the flight of two badminton shuttles, the first of which has been struck hard (with a greater application of force) and the second which has ben struck gently?

77. ## math

a small plane flying into the wind takes 3 hrs 20 min to complete a flight of 960 km. Flying with the wind the same plane takes 2 h 30 min to make the trip.what is the speed of the plane? what is the speed of the wind?

78. ## acct

which account will not appear on an after -closing trial balance?

79. ## Physics

I have a question An airplane is flying at 120km/h due west moves into a region where the wind is blowing at 40km/h. If the planes original velocity is Vplane, what is the expression for the plane's resulting velocity in terms of V plane? Answers are given

80. ## Physics

In moving a 35.0 kg desk from one side of a classroom to the other, a professor finds that a horizontal force of 300 N is necessary to set the desk in motion, and a force of 185 N is necessary to keep it in motion at a constant speed. (a) What is the

81. ## chemistry

number of mole in 850.5g of zinc

82. ## physics

A small steel ball bearing with a mass of 10 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.19 m. Calculate the speed at which the ball leaves the spring. Calculate the

83. ## Magnetic Field Forces: Physics

A uniform magnetic field points north; its magnitude is 3.5 T. A proton with kinetic energy 6.0 × 10-13 J is moving vertically downward in this field. What is the magnetic force acting on it? This is what I've done. The answer is incorrect. Please help me

84. ## Literature

In emphasizing the importance of individual thinking and basing one's beliefs on one's own experiences, Sujourner shows she has much in common with

85. ## physic

A 57 kg boy and a 42 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.4 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in

86. ## algebra

The matrix below shows the sales, in thousands of dollars, for three different stores over a period of two years. sales store A store B store C year 1[110 250 400] year 2 150 300 350 Each store's profit is 3% of its sales. What is the profit, in thousands

87. ## trig

Solving Trig Functions: How Do You Solve For Sin 7.5 Using Half-Angle and Double-Angle Identities?

88. ## algebra

38 = 2a + 54

prove that the statement 1/5+1/5^2+1/5^3 +...+1/5^n=1/4(1-1/5^n) is true for all positive integers n, write your proof in the space below

90. ## algebra

The formula below can be used to find the distance (d) traveled by an object, where v represents the initial velocity of the object, t represents the time, in seconds, and d represents the acceleration, in meters per second squared. d=vt+1/2at with a a

239. ## Sociology college

Yeah, I looked it already but i could not find what i want. and I really appreciate you for telling me the good website

240. ## math

2x^4-9x^3=21x^2-26x+12/2x-3

241. ## Chemistry

An ionic bond has a ___ electronegativity difference between atoms than a covalent bond and almost always involves ___.

242. ## math

how do i convert 0.79 to a fraction

(-9)(5)/-3

244. ## math

i don't understand this fraction please help! 2x - x"2" 3x - 1 ________ + _________ 6 4

245. ## math

If you replace the equal sign of an equation with an inequality sign, is there ever a time when the same value is a solution to an equation? If you replace the equal sign with < of >; is the only time when the same value is a solution to an equation. -6/7

246. ## geography

knowing similarities in big areas of the world is an example of what geography

247. ## Prealgebra

6x-10=56 combine like terms:

248. ## Research

What is a good way to do research on a person? Thanks

249. ## chem

What is the complex ion for NH3PO4 is it ionic or covalent?

250. ## math

let s be a positive number. Solve the following equation for x. √a^3√a^4√a^3=a^x

251. ## us history

For years, many history books claimed that "Columbus discovered America." Why do you think Native Americans might disagree with the word "discovered" in this statement? What might be a better word?

What are the trade agreements of germany? plz help!!

253. ## Math

Using the definition for the Fourier transform, prove that this operation is linear.

255. ## science

the length of the string is 9.984cm.What is the length of the string to the nearest tenth of a centimeter

256. ## chemistry

how do you change Density= mass/volume (D=m/v) to solve v or m?

258. ## English Literature

Help with writing a hook for an essay about Anglo-Saxon societies/kings during that time??

259. ## Hum/205

I need help writing my final. Write a 1,750- to 1,900-word paper that represents three chapters from your new book. Each chapter will contain an analysis from the period you selected. Remember to write in the first person perspective of an art historian

260. ## Algebra

Simplify the rational expression. (45y-9xy)/(x^2y-25y) I got an answer of 9(5-9x)/((x-5)(x+5)) but it seems to be wrong. Can anyone solve this for me and see what they get? Thank you

I'm really into reading about adventure, future, aliens, and something that just relates in with the world. A book like Indiana Jones that explains secrets about the world. I wanted to get the book Secret of the sands, but unfortunatley it's not in my

262. ## spanish

1.hermano / hermana • 2. casado / casada • 3. yerno / esposo • 4. abuela / pez • 5. nuera / yerno • 6. sobrino / sobrina • 7. niño / mascota • 8. pájaro / hermano • 9. suegro / suegra • 10. novio / novia • 11. tío / suegro • 12.

263. ## Physical Education

In your role within a structure discuss the importance of communication. Provide examples that you have used. (4)

264. ## biology

list the paramecium, earthworm, and pumpkin stem according to their relative size from largest to smallest?

265. ## sport

If air resistance is negligible what would the flight path of a shot from the moment of release to the moment immediately prior to landing look like using newtons 3rd law of motion?

266. ## english

How can I fix this sentence? If Julie willingly listens to my mom’s health concerns and provides emotional support, the patient would feel very satisfied with the nurse’s care, and her pain may lessen.

267. ## math gr.6

Is the number 23 the only number between 20 and 28 that can't be divisible equally by 2,3,4, or 5

268. ## math

2x^4-9x#+21x^2-26x+12/2x-3

269. ## english

What is another word for hallucination?

270. ## teaching

explain different ways to govern groups

271. ## math

Explain how you would use a number line to round 148 to the nearest ten.

-3.4-(-7.6)

-1/2-(-5/8)

274. ## math

4-(-3)+1/2-2/(-2)

275. ## physical education

what is the meaning of extrnsic motivation?

276. ## Algebra

if $1500 grew to$1575 with 4% simple interest how long was the money in the account?

277. ## Jiska

So are most of the question-answerers on this site volunteers, or are they paid by the advertising?

278. ## Health

MVP should be ruled out, which means eliminate the possibility of: 1. Mitral Valve Prolapse 2. Myoocardial Infarction 3. myocardiitis 4. Heart Murmur I took the answer to be number 1 Please help am I right?

279. ## math

Please solve -2x+7>22 -2x+7-7>22-7 -2x>15 -2x/(-2)

280. ## math

if a+b=3 and a^2+b^2=6, what is a^3 + b^3

281. ## math

if a+b=3 and a^2+b^2=6, what is a^3 + b^3

282. ## calculus

limit as x approaches 1 x^2-4/x-1

284. ## math

-3.38+r-9.76 Solve, I think the answer is 2/8.

285. ## arithmetic

0.2 in extended form

What opportunitie are there for UK firms in China and India?

287. ## earth

compare and contrast the pros and cons of agriculture

288. ## social studies

the form of government used in most of louisisana's parishes is called what

289. ## Chemistry

SO3 is a ___ molecule that contains ___ bonds.

290. ## EnGlIsH

hi there mm i have to put the meaning of thus sentence it about comparisons and contrast clues... Althought we had expected a multitud to come to the rally, only ten or fifteen people showed up. comparison/contrast Meaning:????

291. ## English

I have to write Anecdote and I choose "you can always count on your friend" However my teacher said that Anecdote is not fictional and that it is something that happened you or someone you know. Well this happened to my friend and I wrote about it. I am

292. ## sport

Can you name and explain 3 factors (excluding air effects ) which should be utilised by a shot putter to optimise the distance thrown using newtons trird law of motion

293. ## physics

a skier moving at 85 km/hr straight down a tall ountain having a 60 degrre slope. at what rate is his altitude decreasing?

294. ## college physics

An airport worker needs to make it across a luggage belt in order to retrieve a stuck suitcase. The belt is moving with 1.6 m/s, and the worker can run with v=1.7 m/s. If he wants to make it straight across the d=2.3 m wide belt, how long will it take for

295. ## medical coding and billing

discuss coding or obstetrics, including items covered by the global fee for antepartum and pospartum periods of normal pregnancy

296. ## physics

what do you do to find a vector that balances another vector.

297. ## ethnics

describe different methods to calculate prejudice by sociologist

298. ## %

How do I find a dollar number plus 7.1% that will come close to $70.00 Here is what Im doing..I rent out packages that are$70.00 and I want to pay 7.1% sales tax out of that $70.00..What dollar amount do I use to add 7.1% to, to make it as close to$70.00

299. ## response

what should i write for a response?!

6(x+4)=3x-2

301. ## English 125

Describe your feelings and use examples from at least two of the poems that elicited these or any other particular feelings.

302. ## conpute

which of kurzweil predictions do you agree with

303. ## math

the length of a rectangle is 9in. greater than the width.the area 36in.2 find the dimensions

hOW WOULD YOU FIGURE 3/10 OF \$3.50?? WOULD YOU DIVIDE BY 3? THANK YOU..

305. ## physics

A bullet is shot straight down at a speed of 3.9 m/s. After 2.3 seconds, how fast is it moving? Use 10 m/s2 for gravity. Give answer in m/s.

306. ## math

in music what does allegro mean?

-3.38=r-9.76

s+5/8=7/8

309. ## math

x/5-1=3

it said list your five sensea

311. ## spanish

what is seteciento trece

312. ## spanish

what is catorce millones

313. ## social studies

what are some collages in north carolina's mountain reigon?

314. ## social studies

at its point how wide is west podiatry from east to west

315. ## buisness

Think of a way Centura College Online could utilize one of the systems for decision making or control mentioned in this chapter to improve the way it educates students. Write a proposal (minimum of one page) to the School Director “selling” your idea.

316. ## math

how do i solve by factoring x^4+2x^2y^2+9y^4

317. ## algebra 1

What is the area of a square with the dimension 1+square root of 3? a.4 b.4+2square root of 3 c.3square root of 3 d.5 B?

318. ## English

Hi, this the description paper I posted before except I changed it. I have to redo it. I took you guy's advice please check and correct me. Thanks. By the door, there paused an impatient low spirited woman. She was in her twenties and she had big, bright

319. ## math

Whats all the possible whole-number pairs of length and width for a rectangle with a perimeter of 18 meters? and how do i put it in a table/chart

320. ## math

what is the multiple of 120

321. ## world history

whatt will cause a population to grow?

s+5/8=7/8

323. ## spanish

what is novecientos dos