# Questions Asked onOctober 2, 2012

1. ## Physics

A turbine is spinning at 3600rpm . Friction in the bearings is so low that it takes 11min to coast to a stop. How many revolutions does the turbine make while stopping?

2. ## ENGLISH

Briefly describe Poe’s requirements for the short story genre.

3. ## physics

An Alaskan rescue plane traveling 42 m/s drops a package of emergency rations from a height of 117 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s2 . Where does the package strike the ground relative to the point directly below

4. ## physics

A boat moves through the water with two forces acting on it. One is a 2100. N forward push by the water on the propeller, and the other is a 1600. N resistive force due to the water around the bow. (a) What is the acceleration of the 1200. kg boat? (b) If

5. ## Physics

Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Assume the orbit to be circular and 160 km above the surface of the Moon, where the acceleration due to gravity is 1.42 m/s2. The radius of the Moon is 1.70

6. ## physics

(a) One blade of a pair of scissors rotates clockwise in the xy plane. What is the direction of for the blade? into the xy plane out of the xy plane clockwise counterclockwise (b) What is the direction of if the magnitude of the angular velocity is

11. ## English 4

A recurring theme in literature is the transient nature of the world and life. Provide two ways in which this theme is expressed in Anglo-Saxon and medieval literature.

12. ## Language Arts

Read the following passage from Harriet Tubman: Conductor on the Underground Railroad: She lifted the gun, aimed it at the despairing slave. She said, “Go on with us or die.” The husky, low-pitched voice was grim. What is the effect of Petry’s

13. ## Math

A base ball diamond is square. The distance from home plate to first base is 90 feet. In feet, what is the distance from home plate to second base? (1 point) 127 81 19 13

14. ## chemistry

Nitric acid reacts with silver metal: 4HNO3 + 3Ag -> NO + 2H2O + 3AgNO3. Calculate the number of grams of NO formed when 10.8 g of Ag reacts with 12.6 g HNO3

15. ## chemistry

A piece of a newly synthesized material of mass 25.0 g at 80.0 ◦ C is placed in a calorimeter containing 100.0 g of water at 20.0 ◦ C. If the ﬁnal temperature of the system is 24.0 ◦ C, what is the speciﬁc heat capacity of this material?

16. ## chemistry

How much heat is required to heat 28 g of solid silver from 130 ◦ C to liquid silver at 961 ◦ C? The speciﬁc heat of solid silver is 0.235 J/g · ◦ C, and the heat of fusion of silver at its melting point of 961 ◦ C is 11.3 kJ/g. Answer in units

17. ## math

Ted's patio is the shape of a right triangle. Tell how he should determine the area of the patio.

18. ## Science

Q16: A clear plastic cube with exactly the same index of refraction as water, is placed in a container of water. Would you be able to see the plastic cube in the water if you looked at it from an angle? Please explain why or why not.

19. ## Physics

7. A cyclist is travelling with a speed of 12.0 m/s when she applies the brakes. After slowing for 3.0 s, her speed has been reduced to 4.0 m/s. (a) What distance does she travel during this time? (b) What is her acceleration? (c) If she continues braking,

20. ## math

write each decimal in standard form, expanded form, and word form. 12+0.2+0.005

21. ## Math

Elizabeth visits her friend Andrew and then returns home by the same route. She always walks 2km/h when going uphill, 6km/h when going downhill and 3km/h when on level ground. If her total walking time is 6 hours, what is the total distance she walks in

22. ## math

Each week, Bart earns a base rate of $85 and a commission on each dollar of merchandise he sells. If Bart sells$3600 in one week and c represents the commission percentage, which algebraic expression represents his earnings for that week? would the answer

23. ## 7th grade social studies

1. In 1300, the Holy Roman Empire included parts of all the following modern countries EXCEPT (1 point) Italy. France. Spain. Germany. My answer is 1. Germany Is this correct?

24. ## Chemistry

A chemist is preparing to carry out a reaction at high pressure that requires 36.0 mol of hydrogen gas. The chemist pumps the hydrogen into a 15.5L rigid steel container at 25 degrees Celcius. To what pressure (in atmospheres) must the hydrogen be

25. ## chemistry

Write the formulas of the compounds formed Pb+4 with the following anions:OH-, NO3- , CO3(2-), HSO4- , PO4{3-} . Use the given order of anions.

26. ## math

Jon begins jogging at a steady 3m/sec down the middle of lane one of a public track. Laura starts even with him in the center of lane two but moves 4m/sec. At the instant they begin, Ellie is located 100 meters down he track in lane four, and is heading

27. ## Finance

Keenan Co. is expected to maintain a constant 3.8 percent growth rate in its dividends indefinitely. If the company has a dividend yield of 5.6 percent, what is the required return on the company’s stock?

28. ## Science

An American Red Cross plane needs to drop emergency supplies to victims of a hurricane in a remote part of the worlds. The plane is traveling horizontally at 100.0m/a at a height of 50.0 above the ground.What horizontal distance does the package travel

29. ## Chemistry

A 5.00L reaction vessel contains hydrogen at a partial pressure of 0.588atm and oxygen gas at a partial pressure of 0.302atm. The equation is 2H2(g)+O2(g)-> 2H2O(g). Suppose the gas mixture is ignited and the reaction produces the theoretical yield of the

30. ## math

Felipe has saved $625. He is starting a part-time job that pays him$150 a week, and he plans to save all of the money he earns. Which algebraic expression represents Felipe's total savings after x weeks? A.625x + 125 B.775x C.150x + 625 D.125x - 650 is it

31. ## math

A cell phone company charges each customer a base rate of $15.00 per month for its services. The company also charges each customer$0.02 per minute used. Which algebraic expression represents each customer's monthly charge for m minutes? A.15 (0.02m) B.15

32. ## Chemistry (Internal Energy)

5 kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1, where the specific internal energy U(1) is = 2710 [kJ/kg] to state 2, where U(2) = 2660 [kJ/kg]. During the process, there is heat transfer to the steam with a

33. ## Math

A drawer has 10 pairs of gloves. If I grab 5 gloves at random, what is the probability that I pick at least one matched pair? What is the probability that I pick at least one right glove and one left glove?

34. ## College Chemistry

how do i calculate the moles of Na2CO3 present in the original 25.00mL aliquot of carbonate solution?? the tared mass of Na2CO3 is 1.5179g

35. ## Science 8R - Help!

Describe "Water Displacement". Give an example from everyday life.

36. ## chemistry

what is the lewis dot structure for BN

37. ## physics

An Alaskan rescue plane traveling 42 m/s drops a package of emergency rations from a height of 117 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s2 . Where does the package strike the ground relative to the point directly below

38. ## calculus

A plane flying horizontally at an altitude of 1 mi and a speed of 560 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. (Round your answer to

39. ## Math

If the length of the hour and the minute hands of a clock are 4 cm and 6 cm, respectively, what is the distance in cm between the tips of the hands at two o'clock?

40. ## Math

4 ^ (3x–1) = 1.5625 × 10 ^(–2)

41. ## Physics

Stephanie serves a volleyball from a height of 0.85 m and gives it an initial velocity of +6.6 m/s straight up. How high will the volleyball go? The accel- eration of gravity is 9.81 m/s2. Answer in units of m

42. ## Chemistry (Insulated Vessel, temperature and vol.)

Insulated vessel has two compartments separated by a membrane. One side is 1 kg of steam at 400 C and 200 bar. The other side is evacuated. The membrane ruptures filling the entire volume. The final pressure is 100 bar. Determine the final temperature of

52. ## physics

A rock climber stands on top of a 56m -high cliff overhanging a pool of water. He throws two stones vertically downward 1.0s apart and observes that they cause a single splash. The initial speed of the first stone was 2.5(m/s) How long after the release of

53. ## chemistry

The enthalpy of combustion of benzoic acid (C6H5COOH) which is often used to calibrate calorimeters, is −3227 kJ/mol. When 1.402 g of benzoic acid was burned in a calorimeter, the temperature increased by 3.401 ◦ C. What is the overall heat capacity of

54. ## PHYSICS

A car is safely negotiating an unbanked circular turn at a speed of 29 m/s. The road is dry, and the maximum static frictional force acts on the tires. Suddenly a long wet patch in the road decreases the maximum static frictional force to one-ninth of its

55. ## Maths

The ratio of the number of cheesecakes to the number of mango cakes was 3:2. After Baker Lam sold 144 cheesecakes, the ratio became 3:5. A) How many cheesecakes did Baker Lam bake at first? B)Baker Lam decided to deliver the remaining cakes to 4 charity

56. ## math

An art collector buys 6 pieces a year for y years before donating 27 pieces to a museum. Which algebraic expression represents the number of pieces the collector still has in her possession? would the answer be 6y - 27?

There are 25 students in Mrs. Roberts 3rd grade class. There are 9 more boys than girls in the class. How many boys and girls are in Mrs. Robert's class? How can I explain this to my 8yr old in 3rd grade? I've got myself so confused in the process of

58. ## algebra

Three girls paid $100 each, a total of$300, to share a motel room. Later, the desk clerk realising she should have only charged $250, gives the room attendant$50 and asks him to return it to the three girls. Unable to divide the money three ways he

59. ## literature

I have 4 questions left that I cannot find the answers for . Any help would be appreciated . The story is The Hound of the Baskerville. Who is coming to take over the manor? Why doesn't Dr. Mortimer want him to go? How does Holmes know that Dr. Watson

60. ## physics

A 7600 rocket blasts off vertically from the launch pad with a constant upward acceleration of 2.25 and feels no appreciable air resistance. When it has reached a height of 560 , its engines suddenly fail so that the only force acting on it is now

61. ## math

mr. and mrs. blank sold their house for $200000 and needed to hire an attorney to handle the closing procedures. attorney mr. gable charges a flat rate of$2500. attorney ms. mandel charges 1 1/2% of the cost of the house. which attorney would be cheaper

62. ## maths

A coin is biased so that a head is twicw as likely to occur as a tail. Suppose the coin is tossed three times. What is the probality of getting at exactly two tails

129. ## Spanish Beg. 1 - Homework Check!

El Tiempo (the weather) 1. Hace sol - sunny 2. Hace (Mucho) calor - hot 3. Esta nublado - ??????? 4. Esta IIoviendo - raining 5. Have fresco - freezing 6. Have viento - fall (not sure......) 7. Hace buen tiempo - ????????? 8. Hace mal tiempo - ????????? I

130. ## physics

While sitting on a frozen pond, a 35kg child throws a 0.5kg ball horizontally at a velocity of +6m/s. Calculate the resulting velocity of the child across the ice.Suppose the child throws the ball upward instead, at a 25o angle above horizontal. a)

131. ## math

Find interval length 1/4 in [1,2] containing the root of the equation x^7 +3x-10=0

132. ## Physics

Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 635 rev/s. A point on one of the blades traces out a circle with a radius of 0.021 m as the blade rotates. (a) What is the

133. ## physics

A 1,080-N crate is being pushed across a level floor at a constant speed by a force of 290 N at an angle of 20.0° below the horizontal, as shown in the figure (a) below. (a) What is the coefficient of kinetic friction between the crate and the floor? (b)

134. ## Chemistry

67.0 mL of a 1.50 M solution is diluted to a volume of 258 mL. A 129-mL portion of that solution is diluted using 163 mL of water. What is the final concentration?

135. ## physics

a hot-air balloon having initial velocity vi as it ascends. Then, a water balloon is dropped from the basket when it is 135 meters high and would hit the ground after 9.00 seconds. a) find the velocity of the hot-air balloon upon release of the water

136. ## statistics

supposed that the average weight loss for someone on a diet is 15 pounds with the standard deviation of 4 pounds. a sample of 18 adults enrolled a sswp have a mean weight loss of 15.83. using 0.01 level of significance.

137. ## physics

A dockworker loading crates on a ship finds that a 21-kg crate, initially at rest on a horizontal surface, requires a 70-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 51 N is required to keep it moving

138. ## English

I am writing my college essay. I amwriting about the most unforgettable experience i've had and how it impacted my life. I am writing about when my dad was arrested. I have my opening (see below) but I don't know how to continue can you help. The opening

139. ## Physics

A car starts from rest on a curve with a radius of 130m and accelerates at 1.1m/s^2 .Through what angle will the car have traveled when the magnitude of its total acceleration is 2.7m/s^2 ?

140. ## physics

Your groceries are in a bag with paper handles. The handles will tear off if a force greater than 58.4 N is applied to them. What is the greatest mass of groceries that can be lifted safely with this bag, given that the bag is raised (a) with constant

141. ## physics

A diver steps off a cliff and dives from 40 meters into the ocean. How long will he fall before he hits the water?

142. ## math

Dress rehearsal of the play was attended by 142 people. Opening night was attened by 238 people. How many people saw the two shows in all?

143. ## economics

When the price of X is $1 and the price of Y is$1 and income is I, Joe Panther spends $100 on good X. One day Joe is walking down Downer street and is dismayed to discover that the price of good X has increased to$2. However, moments later Joe is

144. ## Pre-Calculus

Rational Functions does the following function have a hole or a vertical asymptote or both? how do you know? find the y-value at that point. y=x^2+7x+12/x^2+8x+15 I factored this out to y = (x+3)(x+4)/(x+5)(x+3) The x+3's cancelled out. I don't get the

145. ## physics

Trevor can row a boat at 3.00 mi/hr in still water. He needs to cross a river that is 1.20 miles wide with a current flowing at 1.60 mi/h. Not having his calculator ready, he guesses to go straight across, he should head 60.0 degrees upstream with respect

227. ## math

Jame shas an assigned seat for his flight to Denver. The seats on the plane are numbered 1-49. Jame's seat number is an odd number greater than 10 that is factor of 100, What is his seat number for the flight?

228. ## science

make a graphic organizer to show ways how ways to cause physical changes to a piece of paper

229. ## space

What causes the rings around the equators of Saturn and jupiter

230. ## literature

"There is one correspondent who is a sure draw, Watson. That is the bank. Single ladies must live, and their passbooks are compressed diaries." What does this quote mean?

231. ## chemistry

what is the reason hydrogen have -1 oxidation number?

232. ## calculus

How do I solve this using the TERM BY TERM method? If f(x)= (2x^2 - 5x - 3) / (3-x) find f'(-8).

233. ## language

introduction for an essay . show me please

234. ## English

Dividing the pie into, Felicia took the least and gave me the larger portion. Is least correct or should it be lesser? It doesn"t sound right with lesser.

235. ## English

what are the different types of comparison? What's a comparison that's not direct, but implied?

236. ## Calculus

y=x^3-3x. Fill out the following table and then make a rough sketch of the graph. I can make the sketch just having trouble understanding what is wanted. y=0 when y'=0 when Relative Max(s) Relative Min(s) y'>0 on the interval(s) y'

237. ## English

Identify the infinitive phrase in the sentence below. The pilot agreed to fly from Texas to Oklahoma. (1 point) agreed to fly fly from Texas to Oklahoma to fly from Texas to Oklahoma

238. ## physics

Suppose runner A starts at the 0 degree mark on a circular track (circumference = 400m). And let runner B start at the 180 degree mark. If runner A starts running counter clockwise with acceleration 2m/s^2, and runner B runs clockwise with constant speed

239. ## HVAC

How many Ampere of 1 horse power motor?

240. ## Pre-Calculus

Rational Functions y = (x^2+7x-4)/(x-2) Since the degrees of both the numerator and denominator are the same, I would use the leading coefficient, and both the rational functions start with 1, so would the horizontal asymptote be 1? Also don't get how to

241. ## social sciences

The market supply for potatoes in New York is 2,000 tons for a price of $200 a ton, and 5,000 tons for a price of$500 a ton. Between these two prices market supply is a straight line. What is the equation of the supply curve?

242. ## Math

If I have the inputs 1 2 3 4 and 5 and my outputs are 1 4 9 16 and 25 what is the output

243. ## CHEM

A sample of an unknown hydrate weighs 0.500 g and after heating it weighs 0.100. What is the percent of water in the hydrate?

244. ## Chemistry

In acidic solution, VO_2^+1 is reduced to VO^2+, whereas Mn^2+ is oxidized to MnO_4^-1 . Given the partial equation VO_2^+1? +Mn^2+? ---> VO^2+ ? + MnO_4^-1? What must the coefficients be so that the electrons are balanced?

245. ## Pre-Calculus

Radical Functions Graph y=(x-3)(x+2) and y=√(x-3)(x+2). where are the x-intercepts of each function ?why? for the first one, i know that whatever is inside the brackets is opposite, so the x intercepts would be at 3, and -2. but the whole radical thing

246. ## Uni Physics

A 67 kg astronaut (Jeff), an 88 kg astronaut (Brett) and a 17 kg rock are tied together by a light rope during a space walk. The distance between Jeff and the rock is 5.0 m, the distance between Brett and the rock is 2.0 m. Find the position of the centre

247. ## Statistics - math

Each consumer has a 25% chance of preferring your product over the competitor's product. If we question 15 customers, what is the probability that at least 3 will prefer your product?

248. ## math

what % is 7.5 over 10? Is 7.5 over 100 7.5%?

249. ## algebra

what are the steps of solving (4sqr(41))^2 the answer is 656 but i need to know how the got the answer

250. ## Math

Given the following statistical list: 13,17,19,22,25,27,29,29,32,and 33. Assuming a desired "Confidence Level" of 95%, find the confidence interval for the above scores. 19.8 < u(mean)< 29.4 14.6 < u < 33 13.4 < u < 22.7 11.1 < u < 18.5 I have 2 weeks to

251. ## Uni Physics

Total mechanical energy of a flying rubber ball is 1692 J. It has a mass of 0.86 kg, and it is 8 m above the ground. Find the speed of the ball.

252. ## Math/Statistics

Can anyone please help me explain confidence intervals. How does one tell/determine if a confidence interval is too wide? What indicates too wide? Thanks in advance!

253. ## Math

Has memory chip capacity's growth been exponential? How much longer is the exponential growth likely to continue? Explain.

254. ## Math

use compatible number to estimate problem: 1,212 + 347 537 + 3,244 329 + 64

255. ## matj

in a class there are 17 right handed students and 3 left handed students, what percent of the class is right handed?

256. ## english

Hot to unscramble rdntcioiya

257. ## Algebra

what is 18 percent of 240

258. ## Chemistry

From my previous question about partial pressures in the equation 2H2(g)+O2(g)>2H2O(g), how can I use PV=nRT to find the number of moles in each of the reactants when I am not given the temperature, or the volume of the individual gases?

259. ## pprecalc

the function is one of the form y=g(x) +cosbx. find two linear functions y1 and y2 related to g such that y1 is less than or equal to y is less than or equal to y2. a. y= 2x + cos x b. y= 1-0.5x+ cos2x

260. ## Trigonometry

Express 3 rad in degree measure and approximate to four significant digits

261. ## HEALTH

What is meant validation strategy in a person with dementia

262. ## calculus

How do I solve this using the TERM BY TERM method? If f(x)= (2x^2 - 5x - 3) / (3-x) find f'(-8).

263. ## calculus

Using the chain rule... how can i differentiate this? y=xã(x-2)

264. ## math

If μ = 500 and σ =10, z = -3.0 falls how many points below the mean?

265. ## Physics

A dog throws a bone into the air at 17.2 m/s...How high will it rise and How long will it take to reach the peak of its trajectory?

266. ## stats

If SS = 50 and s^2 = 10, what is n?

10(square root400 - 15) 10(20-15) 10(5)= 50 would this be correct?

268. ## GEOMETRY

If RS=ST=19, s

269. ## math

Abby takes 6 steps forward, then 2 steps back. If she repeats this pattern, how many steps will she be from where she started after 4 moves? After 5 moves?

270. ## Math

solve: 9x-11=-56

271. ## algebra

how do i do this problem? Had 16 now have 20

272. ## Physical science

I need help on how to set up a formula for 27c and 750 mm hg,a sample of hydrogen occupies 5.00 l how much space will it occupy at stp

273. ## English 8R - It Happened in The City

impressive jungle of concrete?????????????????????????????????? I need a definition!!!!

274. ## Biology!!!!!!!!!!!!!!!!

In preparing some blood for observation with a microscope, a student puts a drop of blood into a test tube containing 2 cm3 of water. After mixing, he examines a drop of the mixture. Explain why he cannot see any blood cells under the microscope.

275. ## Math

If the quadratic equation x^2 + bx +c=0 has exactly one solution r, then find b/c.

276. ## algebra 2

what are some patterns seen in pascal's triangle?

277. ## math

Vincent estimated 293-44 and got a difference of about 250.Is this reasonble estimate?Explain.

278. ## social studies

crossword puzzle for: golden ___

279. ## physics

What is the component of a vector (in the plane) whose magnitude is 86.4 and whose component is 62.5?

280. ## Biology/Science

1. Describe a SPECIFIC EXAMPLE of how increased temperature can change cellular processes. 2. What FACTORS (can be properties of animals or the environment) determine how wide a range of temperatures a species can tolerate? Be as comprehensive as you can.

281. ## Math

what is 18 percent of 240?

282. ## math

if cosx = 12/13 and x is a quadrant I angle. Find the value of sinx

283. ## Grammar

Is this sentence correct? The shampoo was concentrated, therefore I only used a little bit.

284. ## science

A ship sails 100mi northeast, then 50mi due south. How far is it from the starting point?

jk

286. ## organic chemistry 1

If the two parts of mixture have a 1:1 ratio by mass what's the largest amt each component could be?

287. ## Grammar

Josh Lozier's football pants were to long, so they had to be altered. Is this a run on sentence?

288. ## Math

Solve the system by using the substitution method. y= 3/4x - 4 -x + 2y= -6