# Questions Asked onJanuary 11, 2011

1. ## Physics

You place a box weighing 353.8N on an incline plane that makes a 42.5 degree andle with the horizontal. Compute the component of the gravitational force acting down the incline plae. Answer in Units of N

2. ## Physics

Original Question: A block hangs in equilibrium from a vertical spring. When a second identical block is added, the original block sags by 5.00 cm. What is the oscillation frequency of the two block system? bobpursley s'ltn: F=kx = mg x=mg/k but for the

3. ## statistics

What percent of the observations in a distribution lie between the first quartile and the third quartile? A. 75%. B. 50%. C. 25%. D. None of the above.

4. ## physic

A bobsled slides down an ice track starting (at zero initial speed) from the top of a(n) 146 m high hill. The acceleration of gravity is 9.8 m/s2 . Neglect friction and air resistance and de- termine the bobsled’s speed at the bottom of the hill. Answer

5. ## physics

A ventilation fan has blades 0.25 m in radius rotating at 20rpm. What is the tangential speed of each blade tip? i don't understand how to do tangential speed.

6. ## physics

A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 2.00 cm, and the toy is released. If the toy has a mass of 105 g and rises to a maximum height of 75.0 cm, estimate the force

7. ## science

How many grams of CO are needed to react with an excess of Fe2O3 to produce 558 g Fe? The equation for the reaction is: Fe2O3(s) + 2 CO(g) → 3 CO2(g) + 2 Fe(s)

8. ## math

Theotis had to load a truck with television sets. The cargo area of the truck is a rectangular prism that measures 8 ft. by 21 ft. by 11 ft. Each television set measures 1 ½ ft by 1 2/3 ft. by 1 1/3 ft. How many tv’s can be loaded into the truck?

9. ## physics

A box having a mass of 50kg is dragged across a horizontal floor by means of a rope tied on the front of it. The coefficient of friction between the box and the floor is .3. If the angle between the rope and the floor is 30 degrees, what force must be

10. ## Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 Calculate the value of the C C (triple bond) energy in C2H2 in kJ/mole.

11. ## Physics

A block hangs in equilibrium from a vertical spring. When a second identical block is added, the original block sags by 5.00 cm. What is the oscillation frequency of the two block system?

12. ## Physics

Earth has a mass of 5.97x10^24kg and a radius of 6.38x10^6m. Find the wight of a 65.0kg person on the surface of the earth and 1000km above the surface of earth?

13. ## physics 11

brutus, a champion weightlifter, raises 240 kg a distance of 2.35 m. How much work is done by Brutus lifting the weights?

14. ## Math

Using my faucet, it takes 6 minutes to fill our water tank. Using my neighbor's hose, it takes 9 minutes. How long would it take if i used both the faucet and the hose?

15. ## Physics

An object in SHM oscillates with a period of 4.0 s and an amplitude of 10 cm. How long does the object take to move from x=0cm to x=6cm. Okay, so first I used f=1/T to find the frequency =0.25Hz. Then, I used frequency to find omega w=2*pi*f =1.57 rad The

16. ## science

How are fossil fuels formed?

17. ## Physics

A certain spring stretches 5.3 cm when it supports a mass of 0.65 kg . If the elastic limit is not reached, how far will it stretch when it supports a mass of 10 kg ?Answer in units of cm

18. ## chemistry

Draw a line-bond structure for propene,CH3CH=CH2; indicate the hybridization of eachcarbon, and predict the value of each bond angle. Can someone explain the steps, im lost with how our teacher explained, about sp2 and sp3, ect. help?

19. ## physics

saturn has a mass of 5.68 x 10^26 kg and a radius of 6.03 x 10^7 m. a) what would be the weight of a 65.0-kg person on the surface of saturn? b) what would be the weight of a 65.0-kg person 1000 km above the surface of saturn?

20. ## geometry

the diagonals of a rectangle are 12 inches long and intersect at an angle of 60 degrees. find the perimeter of the rectangle. please help :)

21. ## Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hºf (kJ/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is

22. ## chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 Calculate the value of the C C (triple bond) energy in C2H2 in kJ/mole.

23. ## statistics

the scheduled commuting time on Long Island Rail Road from Glen Cove to New York is 65 minutes. Suppose that the actual commuting time is uniformly distributed between 64 and 74 minutes. What is the probability that the commuting time will be a) less than

24. ## physics

Some enterprising physics students working on a catapult decide to have a water balloon fight in the school hallway. The ceiling is of height 3.2 m, and the balloons are launched at a velocity of 12 m/s. The acceleration of gravity is 9.8 m/s2 . At what

25. ## Physics

A 0.012-kg bullet is fired straight up at a falling wooden block that has a mass of 5.0 kg. The bullet has a speed of 670 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t

26. ## Physics

The speed of a vehicle is 3.56 meters per second. Select from the list below all of the answers which express that speed and which are formatted so that CAPA can judge the answer [* means multiply, ^ means raise to a power, / means divide]. (Entering the

27. ## spelling

what is the analogy for thorn

28. ## english

I need help on analyzing the poem, "you are reading this too fast" by Ken Norris

29. ## Physics

Three identical stars of mass M form an equilateral triangle that rotates around the triangle's center as the stars move in a common circle about that center. The triangle has edge length L. What is the speed of the stars?

30. ## math

A dog is tied to a leash that is hooked to the outside corner of a barn that measures 12 ft.x20 ft. The length of the leash is 16 ft. What is the maximum area in which the dog can wander?

31. ## Bio

When does DNA replication take place in the cycle?

32. ## math

an equation is being tested for symmetry with respect to the x-axis, the y-axis, and the origin. explain why, if two of these symmetries are present then remaining one must also be present.

33. ## physics

A flower pot is thrown out of a window with a horizontal velocity of 8 m/s. If the window is 1.5 m off the ground, how far from the window does it land?

34. ## MATH

Greatest common factor of 4x^2y^3 and 6xy^2

35. ## chem

how many grams of hydrogen chloride is needed to produce 200 grams of hydrogen

36. ## Math

You earn $7.25 per hour babysitting. Write and solve an inequality to find how many full hours you must work to earn at least$200

38. ## us history

What are some results of the Whiskey Rebellion?

39. ## physics

A bomber flies horizontally with a speed of 235 m/s relative to the ground. The altitude of the bomber is 3570 m and the terrain is level. Neglect the effects of air resistance. The acceleration of gravity is 9.8 m/s2 . a) How far from the point vertically

40. ## Science/language arts

I need a poem that I need about lithosphere

41. ## math

how do i write twenty-three hundredths as a number

42. ## english

K im not trying to cheat or nothing but im doing this exam im not asking for the answer i just need to understand the first part of the question more it asks me to give a thesis statement for no gumtion and barrio boy, but what im trying to figure out is

43. ## physics

(a)If a crate slides down a 10 degree incline at uniform speed, what is the coefficient of friction between the crate and the incline?(b)What is the coeffiecient of friction using a 20 degree incline?(c)What is the coefficient of friction using an n degree

44. ## stat

the time between unplanned shutdowns of a power plant has an exponential distribution with a mean of 20 days. Find the probability that the time between two unplanned shutdow is a) less than 14 days B) more than 21 days c) less than 7 days

45. ## Pre-Algebra

Measure of two angles of a tringle are 28 and 58. Classify triangle by it's angle.

46. ## Physics

Calculate the ratio of the kinetic energy to the potential energy of a simple harmonic oscillator when its displacement is half its amplitude. Wouldn't it just be K/U=1/1 or just 1 Because at half the amplitude, it's going to be a combination of K and U.

48. ## english

help me please!!!!! The manner in which action is presented indicates verb: mood. tense. voice.

49. ## calculus

An athlete is running around a circular track of radius 50 meters at the rate of 5 meters per second. A spectator is 200 meters from the center of the track. How fast is the distance between the two changing when the runner is approaching the spectator and

50. ## physics

Tarzan is crossing a river by swinging on a 10.0-m long vine with a breaking point of 1.0 x 10^3 N. If Tarzan's speed at the bottom of his swing is 8.0 m/s, what is the largest mass that Tarzan can have and still make it across the river? [Hint: There are

51. ## physics

A 0.44 kg object connected to a light spring with a spring constant of 22.0 N/m oscillates on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest. (a) Determine the maximum speed of the mass. 28.28 cm/s (b) Determine

52. ## science

a student stands at the edge of a diving board that is 3 m high. the student's weight is 350 N. what is the student's gravitational potential energy relative to the surface of the water?

53. ## math

Each prize for a carnival booth cost $0.32. how many prizes can you buy with$96?

54. ## physics

A boy exerts a horizontal force of 2nt to pull his 2kg sled over the snow. If he gives someone a ride on his sled and he has to exert a 12nt force to pull the sled, how much does that person weigh and what is their mass?

55. ## health

what is a 12 letter word for the process by which alcohol enters the blood stream and travels to all body parts?

56. ## chemistry

A 1-\rm L flask is filled with 1.35 g of argon at 25 {\rm ^\circ C}. A sample of ethane vapor is added to the same flask until the total pressure is 1.15 atm.What is the partial pressure of argon, P_Ar, in the flask?What is the partial pressure of ethane,

57. ## math

write 3 different ones numbers you could add to 15 where you need to regroup to find the sum. Need help ASAP. Thanks

58. ## chemistry

what volume of 1.5M NaOH would be required to neutralize 0.65g of pure aspirin?

59. ## Geometry

In a triangle labeled ABC with the following coordinates A(-3,2) B (0,4) C (2,-1) What is the image of each vertex? Give answer as an ordered pair.

63. ## managment science

Supposed you have been hired as a Marketing Manager in a Multinational Company which is dealing in high tech products. Company wants to launch a cell phone in the market which can measure the Sugar level and Heart beat of the users. Since, it is a

64. ## Geological Events

Hot spot volcanoes appear as volcanic chains in the middle of an oceanic plate because as the plate moves away from the hot spot, the volcano becomes less active, then the hot spot forms a new volcano. Is my answer correct.

65. ## calculus

given 7sin^2 theta + cos theta sin theta = 6 show that tan^2 theta + tan theta - 6 = 0

66. ## math

a car travels 12 miles on 0.3 gallon of gas. how far can it travel on 1 gallon?

67. ## science

(This homework question was removed due to a copyright claim submitted by K12 Inc.)

68. ## problem solving

theotis has to load a truck with tv sets. the cargo area of the truck is a rectangular prism that measures 1 1/2 ft. by 1 2/3 ft. by 1 1/3 ft...how many sets can be loaded into the truck?

69. ## English

IS this agood essay A major theme in the book Of Mice And Men is the relationship between the two main characters, George and Lennie. the relationship between them is like a parent and a son, one character is taking care of an uneducated character. Yet

70. ## Ferdinand Marcos University

What are the condensed structure of each of the following: a.)2-pentene b.)1chloro 3 metyl 2 -pentene c.)3 methyl 1 butyne d.)2,3dimethyl pentane e.)2 ethyl 1 methyl hexane

solve df + 10h=3 for h

72. ## English

I have a few more things I'm not sure of. I hope you can help me with them. Thank you. 1)I prefer living in the countryside to living in a big city. I hate busy streets and places jammed with people. (How can you describes streets in which there is a lot

73. ## MATH HELP

I posted this yesterday and no one bothered to check it, therefore Im posting it again, please check it this time. The south edmonton pet shop has several parrots and dogs for sale. There are a total of 24 heads and 82 legs in the display cages. A) Write a

78. ## physics

You place a box weighing 302.1 N on an in- clined plane that makes a 35.6 angle with the horizontal. Compute the component of the gravita- tional force acting down the inclined plane. Answer in units of N.

79. ## Math

If a right triangle has legs of 9in. and 12in. What is the length of the hypotenuse?

80. ## math

A matrix A is said to be skew symmetric if A^T = -A. Show that is a matrix is skew symmetric then its diagonal entries must all be 0. A^T meant to be A transpose.

81. ## Math

In a rhombus all angles are right angles. True or False?

82. ## math

Write the base 10 number 945 s a base 6 number and as a base 12 number. then, using these numbers as base 10 numbers, find the positive difference between them.

83. ## Geological Events

In 2005 and 2006, several major earthquakes occured in Pakistan and Iran, located to the north and west of India. A) Why does the theory of plate tectonics support the occurence of earthquakes in these countries? The plate tectonics theory states that the

84. ## Alg II

I have a rectangle whose sides are in the proportion b:a, where b is the longer side. I draw a line parallel to a inside the rectangle in order to break it up into a square with sides of length a and a second rectangle. Amazingly, the sides of the new

85. ## Physics

What's earth's rotation period?

86. ## math

A number of girls form a singing group. All but 3 of the girls are blondes, all but 4 are brunettes, and all but 5 are redheads. How many girls are in the group?

87. ## Biology

What role do high-energy electrons play in the electron transport chain?

88. ## History

how did boundary settlements help national unity?

89. ## English

What is the adjective in the sentence: It is about the same size as the United States. Also, what are the adjectives and what do they describe in the sentences: The flutes are a third group of instruments. The small keys send a burst of air to large pipes

90. ## physics

baseball thrown horizontally takes 1.1 seconds to reach the ground. What is the height at which the ball was thrown?

132. ## chemistry

How would set up a problem like this? A mass of 20.0 g of NaOH is dissolved in water to form 5.0 dm^3 of solution. What is the molarity of the hydrogen ion concentration if the temperature is 25 degrees Celsius?

133. ## math

Teena's favorite jeans were marked down from $30 to$25. What was the percent discount on the jeans?

134. ## Chemistry Lab

You are given 350 mL a stock solution of 1.66E-02 M benzoic acid, MW = 122.125 g/mol. Answer the following questions. A. What is the number of moles present in the original stock solution? B. You need to dilute the benzoic acid stock solution to 1.24E-03

135. ## Physical Science

To create a supernaturated solution, a student heats a beaker of water on a hot plate and adds sugar until no more sugar will dissolve. The student then strains the solution through a funnel using filter paper and allows the solution to cool. Name two

136. ## social studies

i need help with a acrostic for maryland

137. ## English

Are the following sentences figurative language: "With lies well steel'd with weighty arguments."

138. ## Plate Movement

What parts of earth's interior are involved in a convection current? The mantle. Core. Is that right?

139. ## Chemistry

U+F6-->UF6 If 8.4 g UF6 are recovered from 55 kg of ore, what is the weight % of uranium in the ore? Answer in units of %

140. ## Physical Science

To create a supernaturated solution, a student heats a beaker of water on a hot plate and adds sugar until no more sugar will dissolve. The student then strains the solution through a funnel using filter paper and allows the solution to cool. Name two

141. ## Physics

If the wavelength of the sound wave is 1.3 meters, what is the frequency?

142. ## german

Can someone check if everything is OK? Thank you. Ich habe Weihnachten bei meinen Großeltern im Piemont verbracht. Dort habe ich ein paar wunderschöne Tage mit meinen Verwandten und meiner Familie verbracht. Ich habe auch meine alten Freunde wieder

143. ## algebra

write the equation of the line in slope intercept form that goes through the given point and is parallel (4,-7),y=1/2x

144. ## math

please i need this question answered in a hurry how do you make a fraction as a decimal (Well i know how to do that) But how do you round the decimal to the nearest hundredth i need it answered in a hurry please

145. ## math

solve the equation e^x=30

how do i answer this question....how can you use the multiplication facts for 3 to help you find the multiplication facts for 9?

147. ## world histor

what are three major events, ideas, or poicies that contributed to the end of the soviet Union? including something about easern europe! help pleaseee!!

148. ## Chemistry

a 5.00 Liter tank holds argon gas a 675 kPa and 11C. what would be its pressure if this argon is transferred to a different tanks whose volume is 17.0 liters at 135C?

149. ## Trig/Math

f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase shift, and vertical shift of the function. Amplitude:1/3 Period:?????? Phase Shift:??????? Vertical Shift:+4 Please Help ?

190. ## Trig/Math

f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase shift, and vertical shift of the function. Amplitude:1/3 Period:?????? Phase Shift:??????? Vertical Shift:+4 Please Help ?

191. ## Chemistry

The grams of oxygen that would produce 13.4 g Cl^2O^7 molecules.

192. ## chemistry

how many atoms of Na are there in every 2.5g of Na? please answer me! thank you!

193. ## Chemistry

a 5.00 Liter tank holds argon gas a 675 kPa and 11C. what would be its pressure if this argon is transferred to a different tanks whose volume is 17.0 liters at 135C?

194. ## MATH

Erics 4 test grades are 85, 75, 97, 93 . What must she make on her 5th test to have an average of 87?

195. ## Math

In a right triangle, if the median from the right angle to the hypotenuse is 5 in. what is the length of the hypotenuse?

196. ## English

Can you please check if my sentences are OK? Thank you very much 1)I worked in a jym for one year ("a year" is a mistake?) 2)If you don't have a choice between two different parts do you say: What part did he play in the film Top Gun? The film director (is

197. ## English

I forgot to include these few more sentences. Thank you. 1) As tradition my uncle dressed up (disguised himself as?) as Nikolaus and at midnight sharp he knocked at our door and brought us all the presents. 2)We didn't exchange the presents lying under the

198. ## geology

Is Lake Erie considered a part of the Interior Plains?

199. ## Money Sense

which do individuals usually hve more control over? How much they make or how much they spend? i think its 2nd one?

200. ## Money Sense

is looking for best price on items a good stragety to spend less?

201. ## Chemistry

a 5.00 Liter tank holds argon gas a 675 kPa and 11C. what would be its pressure if this argon is transferred to a different tanks whose volume is 17.0 liters at 135C?

solve -5/6=2/3(3c+4)

203. ## math

18x + 9 10x - 4 ________ > _________ 3 2

204. ## physics

What is physics?

205. ## algebra

if a student has an average of 8 after 20 tests and then gets a 0 on his 21st test, what would his new average be?

How to convert 4.65 into a fraction but in simpilest form while showing your work?

207. ## Econimics

What has been the effect of DRGs on hospital admissions and the length of stay? What are some advantages and disadvantages of DRGs?

208. ## physics

A cylindrical pipe 30 cm in diameter carries water at a volumetric flow rate of 10-3 m3/s. The pattern of the flow in the pipe ...

209. ## chemistry

is this correct? sp3 CH3-CH3 sp2 CH2=CH2 sp CH≡CH im trying to figure out sp3 and sp2c

210. ## math

In another variation of Nim, players are allowed to remove only perfect square numbers of beans and apply this condition. How many beans should you as the first player select to guarantee that you will win the game?

211. ## math

The equations y=-2X+12, y=6-X, and X=0 enclose a region in quadrant I. when that region is reflected over the line y=6-X, a portion of the reflection is in quadrant II. Find the area of that resulting region.

212. ## algebra

factor the following... y^2-16y+64

crossword puzzle on analogies word given are joints:inflamed::?:atrophy, has 7 letters

214. ## History of education

How do you Contrast education in Old Massachusetts Bay Colony, New England with the Middle and Southern States

215. ## Math

Solve the proportion for u. (u-2):(u+3) = 4:3

216. ## math

what do you write when you have to describe a way to compare two fractions when the denominators are the same

217. ## physical science

To create a supernaturated solution, a student heats a beaker of water on a hot plate and adds sugar until no more sugar will dissolve. The student then strains the solution through a funnel using filter paper and allows the solution to cool. Name two

218. ## government

why did many people call for changes to the articles of confederation?

219. ## Philosophy/Religion

What is a positive of a polytheistic society?

220. ## math

Prove that if a subset C of R*R is symmetric with respect to both the x-axis and y-axis, then it is symmetric with respect to the origin

221. ## English

what is the difference between a Synopsis and a summary? thank you soo much :)

222. ## poetry

What is choral reading? Can I have examples of choral reading?(the pieces) Thanks.....

223. ## algebra

Tom's mother pays him $.50 for each problem his gets correct on his test, but he has to give her .25 for each problem he gets wrong. If Tom makes$8.00 on the test, and there were 25 total problems on the test, how many did he answer correctly? Thanks!

224. ## com220

what is the thesis statement in the article " A Nation Apart"

274. ## art

what is significance of picassos tete de cheval painting

275. ## math

What is the area of a square that has the perimeter (inches) equal to the number of days in February (not during a Leap year)?

276. ## Allied Health

which one of the following is an example of a leading question?

277. ## Math

n/15 = 0.24 n=?

x^2+8x+12

279. ## math

how to mixed #s or whole #s 18/7

280. ## Biology

why is a cell small? and how can this be related to the diffusion rate and the synthetic capacity?

281. ## Social Studies

What are some goods and services?

282. ## physics

calculate the force between two 5.0 kg spheres that are 2.5 m apart.

283. ## Grammar

What is the complete subject in the sentence: Every year, blackbirds and blue jays migrate south? Is there a simple way to know the complete subject? Would it be everything before the verb, migrate?

284. ## algebra

solve for the equation 81^2x+1=3^4

30 plus 30

286. ## L.A.

what jargon words are use in track and field?

287. ## algebra

81r^2-36rs+4s^2