# Questions Asked onOctober 5, 2012

1. ## chemistry

Acrylonitrile (c3H3N ) is the starting material for many synthetic carpets and fabrics. It is produced by the? following reaction: 2C3H6 (g) + 2NH3 (g) + 3O2 (G0 - 2C3H3N (g) + 6H2O (g) If 15.0 g C3H6, 10.0 g 02, and 5.00 g Nh3 are reacted, what mass of

2. ## physics

The coefficient of static friction between the 2.3 kg crate and the 35.0° incline of Figure P4.47 is 0.241. What minimum force, F, must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

For an experiement to test elastic collision, ball 2 was at rest and ball 1 was released from a certain height and distance and hit ball 2. A set of measurements were collected which was v1 and v2 prime for each ball. I need to calculate the kinetic energy

4. ## physics

Two packing crates of masses 7.88 kg and 4.62 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 4.62 kg crate lies on a smooth incline of angle 40.0°. a) Find the acceleration of the 4.62 kg crate

5. ## Math

A piece plywood 24 inches wide is cut into strips 2 and a half inches wide, how many strips of this with can be cut. Please help,7th grade.

6. ## Math

what is the written form of .6045?

7. ## physics

A hockey puck is hit on a frozen lake and starts moving with a speed of 14.4 m/s. 3.0 seconds later, its speed is 7.3 m/s. (b) What is the average value of the coefficient of kinetic friction between puck and ice?

If a^x

9. ## chemistry

The formulas for ethane, ethene and ethyne are C2H6, C2H4, and C2H2 respectively. Rank this chemicals 1,2,3 (highest)in terms of strength of IMF and explain the structures of the three molecules. I rank these three based on the bond length so I got C2H2,

11. ## physics

A car is equipped with a bumper that is designed to absorb collisions. The bumper is mounted to the car using pieces of flexible tubing. The car is traveling at 1.5 m/s when it collides with a rigid black wall. If the wall exerts an average force of 44.1

12. ## physics

If M and m are particles connected by light inextensible string. M is held at center and rotated about horizontal axis as M is in equilibrium.What is torque ABOUT ITS CENTER

13. ## chemistry

Rank C2H6O, C3H8O and C4H^10 O in terms of IMF and explain their structures? neeed heeelppp.thank you

14. ## math

A poster is 12 inches longer than it is wide. Find a function that models its area A in terms of its width w.

15. ## math

The height of a cylinder is three times its radius. Find a function that models the volume V of the cylinder in terms of its radius r.

16. ## math

A rectangle has an area of 15 m2. Find a function that models its perimeter P in terms of the length x of one of its sides.

17. ## math

The sum of two positive numbers is 90. Find a function that models their product P in terms of x, one of the numbers.

18. ## math

A right triangle has one leg four times as long as the other. Find a function that models its perimeter P in terms of the length x of the shorter leg.

19. ## math

The volume of a cone is 190 in3. Find a function that models the height h of the cone in terms of its radius r.

20. ## Physics

Two packing crates of masses m1 = 10.0 kg and m2 = 3.20 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 3.20-kg crate lies on a smooth incline of angle 44.0°.

21. ## Physics

4. A football player passes the ball. The ball leaves his hand and is caught 1.7 seconds later by a receiver 30 meters away. (You may assume the ball was caught at the same height from which it was thrown.) a) What is the vertical component of the velocity

22. ## college algebra

solve x^6 - 64 = 0

23. ## physics

Two blocks each of mass 3.65 kg are fastened to the top of an elevator as in the figure. (a) If the elevator accelerates upward at 1.48 m/s2, find the tensions T1 and T2 in the upper and lower strings. (p4.21a1), enter the answer for T2, the tension in the

24. ## physics

The coefficient of static friction between the 2.3 kg crate and the 35.0° incline of Figure P4.47 is 0.241. What minimum force, F, must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

25. ## physics

A 5.20 package slides 1.57 down a long ramp that is inclined at 13.0 below the horizontal. The coefficient of kinetic friction between the package and the ramp is = 0.305 Calculate the work done on the package by friction. Calculate the work done on the

26. ## French

So i have to answer questions from my french textbook called on y va! 1 and on page 34 theres this article about microbes and 3 called rhinovirus,lacotobacillus and bacillus cereus Heres the questions ________________________________________ Quel miscrobe

27. ## Mathematics

Two points P(32degree N, 47 degree W) nd Q(32degree N, 28 degree E) are on the earths surface. Find d radius of the parallel of latitude through P

28. ## science

A prisoner that is funny would be what periodic table element?

What data and stats do you need to know in order to identify profitable nations in which to export.

30. ## English

1. He wants to be a singer in the future. 2. He was a lawyer in the past. 3. He is a doctor in the present. 4. He is a doctor at present. 5. He is a doctor at the moment. 6. He is a doctor currently. 7. He is a doctor now. 8. He is a doctor at the present.

31. ## Chemistry

In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.

32. ## physics

a bomb of mass 5 kg explodes in to two equel fragments. At what angle these fragment fly apart ?

33. ## Chemistry

In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.

34. ## physics

If motion of a particle of mass (m) is given by y=ut+1/2gt^2 (square).find force acting on it

35. ## math 5

why is two hundredths written as 1.02 and not as 1.2?

36. ## english

Which sentence is correct?Select one of the options below as your answer: A. One can never have two many friends. B. One can never have too many friends. C. One can never have to many friends.

37. ## Precalculus

The owner of a horse stable wishes to set up 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The sides of each corral will be attached to the barn, fencing is not needed along the back wall.

38. ## HISTORY

Which of the following groups benefitted the least from the prosperity of the second industrial revolution?

39. ## manufacturing

state the application of theory and design consideration of turnig

40. ## chem

Write the complete ionic equation for Cu(NO3(aq)+K2S(aq)and namd write the formula for the spectator ions in this reaction? This is what I got pls. check it: complete ionic equation: Cu^19aq)+K^1(aq)+S^-2(aq)=K^1(aq)+NO3^-1(aq)+Cu2S(s) net ionic equation:

41. ## chemistry

What two conditions necessary for molecules to be polar? Her's my answer pls check. First, at least one covalent bond in the molecule has to be a polar covalent bond. For a bond to be polar, there must be a difference in the electronegativities of the two

42. ## math

A certain computer can perform 105 calculations per second. How many calculations can it perform in 10 seconds?

43. ## maths magic

here is a math trick i.e,45-45=45.how is that explain me

44. ## US History

In need of help, Who Did Alfred T Mahan Look Up To As A Child?

45. ## physics

A 0.73 kg ball is thrown straight up with an initial velocity of 2.50 m/s. Taking the potential energy of gravity to be zero at the height from which the ball is thrown, determine its gravitational potential energy at the balls highest point. Ignore air

46. ## chemistry

Water has a bent molecular shape, but what if water had a linear molecular shape would the molecule be polar or non-polar? Explain This is what I know pls correct me if I'm wrong. It would be nonpolar because it is symmetric so the charge is equally

47. ## US History

What Did Alfred T Mahan challenges He Faced Growing Up

48. ## Calculus

Find the derivative of y=15x^7+7^x+22

49. ## chemistry

When will hydrogen bonding occur?Give an example of liquid other than H2O in which this type of force is important. In order for a hydrogen bond to occur there must be both a hydrogen donor and an acceptor present. The donor in a hydrogen bond is the atom

50. ## math

Fast Fact. Eight states border one or more of the five Great Lakes. Write a fraction representing the part of the 50 states that border a Great Lake. Write the fraction in simplest form.

51. ## critical thinking/logic

use the direct and the counterexample methods to show that these arguments are invalid? For the counterexample method, display the form used. 1. There could be lightening without thunder. So, there could be thunder without lightening. 2. Nothing its better

52. ## Chemistry

Muriatic acid is the common name of industrial-grade hydrochloric acid (HCl). One of its uses is to clean or etch concrete in preparation for sealing or painting. It is typically sold in 5.00 gallon buckets, with a concentration of 11.7 M. a.What volume of

53. ## Physics

Tarzan swings on a vine 6.8 m long. The tension in the vine is 1200 N if he's moving at 2.9 m/s when the vine is vertical. What is his mass?

54. ## Physics

An object of mass 1.4kg is placed 12.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the object remains fixed on the turntable until a rate of 36 rpm is reached, at which point the object

55. ## Physics

When you're driving your 1200-kg car, you go around a corner of radius 60.8 m. The coefficient of static friction between the car and the road is 0.67. Assuming your car doesn't skid, what is your speed if the force exerted on it is 5800N?

56. ## math

Original amount $90 New amount$84.50 find the percent of increase or decrease

57. ## math

what must be added to each of the following expressions to make it a whole square (i) 4x^2 - 12x + 7 (ii) 4x^2 - 20x + 20

58. ## physics

A 6.0 Kg object undergoes an acceleration of 2.o m/s squared. what is the magnitude of the net external force acting on it?

59. ## calculus

Integrate sinx+cosx/rootsin2x with respect to dx...plzz help me

60. ## health

The key to using a pedometer to meet the Physical Activity Guidelines for Americans is to _________. A. First set a time goal and then calculate how many steps are needed each day to reach that goal B. First set a time goal and then calculate how rigorous

61. ## physics

how long will it take a 1750-watts motor to a lift a 285-kg piano to a sixth storey window 1.6 meters above

62. ## Astronomy

If M is the mass of one body and m is the mass of another body, and their separation is d, then the gravitational force between them is proportional to

63. ## math

Integrate x^2/rootx-1..

64. ## Math

_ _ x _ = _ _ _ = _ _ x _ use number 1 - 9 using each each number only once

65. ## chemistry

25mL of tartaric acid solution is titrated against 31mL of NH4OH. What is the normality of the NH4OH? Please explain how to work this problem.

66. ## Algebra 2

Find f(x), if f(2b-1)=6b+2

67. ## Physics

A 2000 kg car is slowed down uniformly from 18.0 m/s to 5.00 m/s in 4.20 s. (a) What average total force acted on the car during that time? (b) How far did the car travel during that time?

68. ## art 101

According to the author, a. the interpretation of a work of art is objective. b. a work of art may fall into more than one theme. c. it doesn’t make sense to compare art from different cultures. d. all of these are the case: the interpretation of art is

69. ## american history

Which of the following nineteenth-century inventors is associated with Menlo Park in New Jersey? A. Cyrus W. Field B. Thomas Alva Edison C. Alexander Graham Bell D. Gustavus F. Swift

70. ## history

In the Battle of _______, a disastrous charge against forces holding Cemetery Ridge led to Confederate defeat A. Cold Harbor B. Vicksburg C. Antietam D. Gettysburg

71. ## history

As ratified in 1870, the _______ Amendment prohibited any state from denying the vote to any male citizen on account of race, color, or previous condition of servitude. A. Thirteenth B. Sixteenth C. Fifteenth D. Fourteenth

72. ## Algebra 2

Find f(x), if f(2b-1)=6b+2

73. ## Chemistry

If 50.00mL of 1.10M NaOH is added to 25.00mL of 1.86M HCl, with both solutions originally at 24.70 degrees Celsius, what will be the final solution temperature? (Assume that no heat is lost to the surrounding air and that the solution produced in the

74. ## english

The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed. 6. Identify which one of the following sentences

75. ## english

Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and landed

76. ## english

Identify which one of the following sentences contains an unnecessary comma. Please correct the error and explain why the correction is necessary. a. I must have been completely absorbed in my work, because I totally forgot about the meeting. b. Because I

77. ## Chem

Potassium permanganate (KMnO4) solutions are used for the determination of iron in samples of unknown concentration. As a laboratory assistant, you are supposed to prepare 200. mL of a 0.300 M KMnO4 solution. What mass of KMnO4, in grams, do you need? I

78. ## math

if x^4 + 1/x^4 =42 .find x+1/x

79. ## math

x^2 + 1/x^2 = 47. find the value of x+ 1/x and x- 1/x

80. ## Physics

when temperature are near absolute zero, what process causes atoms to begin to clump? Plasmology Condensate Cornell - Weizmann condensation Bose-Einstein condensation Is it d?

81. ## science

a puppy runs a distance of 20m to its mother ina time 5s.what is the puppy's speed?

82. ## economics

f the US dollar depreciates dramatically relative to the Chinese yuan, what effect would this have on consumers and businesses in each country? When is a falling dollar good or bad for the US?

83. ## Economics

Which aspects of the Great Depression are echoed in the ongoing economic crisis that began in 2008? What is different about the two periods? Do they have similar theoretical explanations?

84. ## c programming

To see how the four steps of the software development procedure discussed in Section 1.7 can be applied in practice, you apply them to the following simple programming problem: The circumference, C, of a circle is given by the formula C = 2ðr, where ð is

85. ## Math(Algebra)

An arrow is shot vertically upward from the top of a cliff 80 feet tall, with an initial velocity of 64 ft/s, (the acceleration due to gravity is -16ft/sec). a. Write the quadratic equation representing this scenario when h is 0. b. Find the roots

86. ## Chemistry

60.0 mL of 3.40 M sodium hydroxide is combined with 39.0 mL of 1.50 M magnesium chloride. What mass in grams of solid forms? (Hint: the total or overall reaction is most useful in doing calculations.) I got 485.1

87. ## play

if two child is using finger paints, they are engaging in what kind of play?

88. ## Functions

What is the inverse of h(x)= (1/4x^2)+x ?

89. ## physics

Leroy, who has a mass of 90 , is skateboarding at 8.6 when he smacks into a brick wall and comes to a dead stop in 0.2 .find the force of impact

90. ## Chemistry

If 50.00mL of 1.10M NaOH is added to 25.00mL of 1.86M HCl, with both solutions originally at 24.70 degrees Celsius, what will be the final solution temperature? (Assume that no heat is lost to the surrounding air and that the solution produced in the

91. ## Chemesitry!

Sodium thiosulfate, Na2S2O3, is used as a fixer in photographic film developing. The amount of Na2S2O3 in a solution can be determined by a titration with iodine, I2, according to the equation: 2Na2S2O3(aq) + I2(aq) --> Na2S4O6 +2NaI(aq). Calculate the

92. ## statistics

According to the book Are you Normal?,40% of all US adults try to pad their auto insurance claims to cover their deductible. Your office has just received 128 in insurance claims to be processed in the next few days, what is the probability that fewer than

93. ## Math

If you are in a hot-air balloon at a height of 100 meters, you can expect to see ____ km. Round your answer to the nearest kilometer and enter only the number.

94. ## Chemistry

A 0.3120 g sample of a compound made up of aluminum and chlorine is dissolved in 150 mL H2O. When excess AgNO3 is added, 1.006 g of AgCl is precipitated. What is the number of moles Cl in the aluminum chloride sample?What is the number moles of aluminum in

95. ## chemistry

Would you expect a chemical change to be always accompanied by a physical change?Pls. Explain

96. ## Skeletal System

what type of bone cell is very important in the healing of fractures? osteoclasts osteocytes osteoblasts osteosomas

97. ## math

What does x equal when 7x+6= 5x+4

98. ## college math

Classify the triangle as scalene isoceles or equlateral and as acute, right or obtuse

99. ## chemistry

When two solutions are mixed and a new color is observed, is this color change an indication that a chemical reaction has occurred? Explain. It is not possible to directly observe chemical bonds breaking and forming during a reaction, molecules and atoms

100. ## Science

How does the inner core differ from the outer core?

101. ## math

A circular arc has measure 22ft and is intercepted by a central angle of 27 degrees . Find the radius of the circle.

102. ## Science-Biology

why do plants grow better under certain lighting conditions than others?

124. ## science

what is the control in the following experiment - which brand of popcorn has the least amount of un-popped kernels after 3 minutes?

125. ## chemistry

colorless vinegar added to purple cabbage juice turns pink What is the reason behind and why is it considered a chemical change?

1. Which of these numbers can be classified as both real and irrational? 5.858585858 63.4 square root 21 square root 36 2. Which is both a real number and an integer? 23 1 over 4 square root 27 3.402538 3. Which of these numbers is classified as both real

127. ## science

please tell me if you agree with the following: Which Brand of popcorn hs the least amount of unpooped kernels after 3 minutes. Brand 1 has 1 Brand 2 has 15 Brand 3 has 16 Brand 4 has 5 Brand 5 has 25 the answer is Brand 1 BUT is the: independent variable

128. ## Physics

A person pushes a 19.5-kg shopping cart at a constant velocity for a distance of 35.6 m on a flat horizontal surface. She pushes in a direction 25.4 ° below the horizontal. A 53.1-N frictional force opposes the motion of the cart. (a) What is the

129. ## math-algebra

one pump can empty a pool in 5 days, wheras a second pump can emtpy pool in 7 days. how long will it take the two pumps, working together, to empty the pool?

130. ## Physics

A dockworker applies a constant horizontal force of 90.0Nto a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.0min a time of 5.20s.If the worker stops pushing after 5.20s,

131. ## English ms. sue

ms. sue yesterday i write story abt independence in third person well i have to write another one in first person and i want to write in nonhuman perspective, which animal I be? or could i be something other than creature, but not human?

132. ## math

forty member of a parent organazation are making candles to raise money. one member drops out and the rest have to make 3 more candles each to make up. each member makes the same number of candles. how many candles do they make altogether.

133. ## World History

1.What is an example of economic force? 2. What is an example of political force? 3. What is an example of social force?

134. ## Physics

A turbine is spinning at 3600 rpm. Friction in the bearings is so low that it takes 15 min to coast to a stop. How many revolutions does the turbine make while stopping?

135. ## chemistry

The following reation has the following standard thermodynamic parameters: delta H= -33.6 kJ/mol delta S= -59.8 J/(mol*K). C(g) + D(g) --> E(g) Calculate the temperature at which the reaction becomes nonspontaneous.

136. ## Physics

A car starts from rest on a curve with a radius of 110m and accelerates at 1.2m/s^2. Through what angle will the car have traveled when the magnitude of its total acceleration is 2.1 m/s^2? Steps please.

137. ## Alg 2

Today we learned how to solve systems of equations with 3 variables, however my teacher didn't go over how to do a problem where not every single equation in the system has the 3 variables. Can someone point me to a place that explains this? the kind of

138. ## physics

A small fish is dropped by a pelican that is rising steadily at 0.69 m/s. How far below the pelican is the fish after 2.4 s?

139. ## College Physics

A ball of mass 620 g hangs from a spring whose stiffness is 195 newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is

140. ## statistics

A school adjustment inventory is administered to boys and girls of primary school.Find out weather two groups differ significantly from each other Number mean Std deviation Boys 100 32 10 girls 100 30 6

141. ## time and stress management

relaxation is a state of (a)low arousal (b)high arousal (c)increased blood pressure (d)rapid thought processes my answer is a to analyze exactly what to do with your time,you need to (a)write down everything that you do in a time inventory (b)videotape

142. ## Precalculus

There are 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The diagram has 4 rectangular corrals attached together but fencing is not needed on the back wall of the barn. The barn is above the 4

143. ## Chemistry

What is the temperature of 0.45mol of gas at a pressure of 1.0at and a volume of 10.1L ? if anyone can tell me what i need to do to solve this problem it would be helpful

144. ## time and stress management

progessive mmuscle relaxation is a technique used for (a)falling asleep (B)becoming aware of tension in muscles (C)prepping surgery patients (d)raising blood pressure my answer is b to achieve a low state of arousal,you need to (a)control breathing,thought

145. ## time and stress management

am example of a long-term goal is (a)getting your hair done at your favorite salon (b)traveling to europe (c)finishing a term paper (d)reading a biography my answer is b which of the following is a direct benifit of practicing relaxation techniques (a)less

146. ## Physics URGENT!!!

A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge

147. ## Math

. Identify each expression as a numerical expression or a variable expression. For a variable expression, name the variable. d + 43 - 9

148. ## math

On a winter day the temperature at 6 a.m. was -9° F. At 2 p.m. it was 25° F. By how many degrees did the temperature change from morning to afternoon?

149. ## chemistry

calculate the standard molar entropy change for the combustion of methane gas using S naught values from standard thermodynamic tables. Assume that liquid water is one of the products.

What is the plural form of staff? Not sure if it should be staff or staffs. Thank you for helping. Britt

151. ## elementery

HI, MY dughter is studying 3rd grade.how to prepare Tsat test in math,english.can u tell me any links

152. ## chemistry

at high temperatures, ammonia decomposes to N2 and H2. 2 NH3(g)--> N2 (g) + 3H2(g) Delta H for the reaction is positive and delta S is positive. Estimate the temperature at which this reaction becomes spontaneous

153. ## Sociology

Compare and contrast the theories of Daniel Levinson , Irene Frieze, and Esther Sales concerning adult development.

154. ## science

determine the period of motion when a ball dropped from a height of 4.40m makes a perfectly elastic collsion with the ground without any mechanical energy lost

155. ## science

Hi, create one of the following weather instrument:we would like anemometer.please tell me which one is the best

156. ## criminal justice

the amount of force used in self -defense of another must, under the circumstances that exist, be: a: reasonable, B: correct C: identical D: less than the force being used by the aggressor I think it's D

157. ## Physics

In a head-on collision, a car stops in 0.14{\rm s} from a speed of 24{\rm m}/{\rm s} . The driver has a mass of 67{\rm kg} , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a

158. ## chemistry

I have been knocking around this question for what seems to be an eternity. We have not gotten that far in this class so this is for extra credit. I have managed to get myself confused about something that should be easy. 25mLof tartaric acid solution is

159. ## Physics

Two packing crates of masses 7.57 kg and 4.51 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 4.51 kg crate lies on a smooth incline of angle 40.0°.

160. ## Biology

A detective gathers cell evidence at a crime scene. The victim is a 37 year old man, killed by a blow to the head. Closer examination of the evidence leads the detective to conclude that firewoods was used. Which of the following kinds of evidence BEST

161. ## Physics

A horse canters away from its trainer in a straight line, moving 130 m away in 13.0 s. It then turns abruptly and gallops halfway back in 5.4 s. a) Calculate its average speed. (b) Calculate its average velocity for the entire trip, using "away from the

162. ## Physics HELP!

A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical

163. ## chemistry

C4 H10 O or diethyl ether or with a formula of CH3CH2OCH2CH3 its stick structure is H H H H ! ! ! ! .. H-C-C-C-C- O-H ! ! ! ! .. H H H H I used the this ! sign as a sign for bond. pls help me to determine the geometry for each central atom in this

164. ## that link is not working

HI, MY dughter is studying 3rd grade.how to prepare Tsat test in math,english.can u tell me .can u send me links.Tennese state