# Questions Asked onOctober 11, 2013

1. ## CHEMISTRY...........

1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? My answer: (0.961 atm)(29.0 L) (413k) all divided by (413)(0.961 atm)=29.0 L CO2

2. ## Science-Earth's History

The geologic time scale originally ordered Earth's rocks by: A. absolute age B. relative age C. composition D. decades and centuries B Where did scientists originally get their information to develop the geologic time scale? A. They collected and studied

How do you do this? Find the volume generated by revolving the area bounded by the ellipse(x^2)/9 + (y^2)/4 = 1 about the line x=3.

4. ## Physical Science

C(s) + H2O(g) + Heat CO(g) + H2(g) 17. How would you adjust the temperature to increase the amount of product? 18. Does the removal of hydrogen gas as it is produced shift the reaction to the left or the right? My last two questions on my homework that I

5. ## Social Studies

Which culture carried the knowledge of iron tools across Southern Africa? A. Nubians B. Arabs C. Bantu D. Europeans C Which group of foreign traders first became involved in Eastern Africa's slave trade? A. Arabs B. British C. Dutch D. Portuguese D

6. ## Chemistry

Consider the reaction 2D2(g)+O2(g)→2D2O(l) What is the mass of heavy water, D2O(l), produced when 3.75g of O2(g) reacts with excess D2(g)?

7. ## Physical Science

Which of the following is a single replacement? a. KOH + HCl --> KCl + H2O b. 2Na + 2H2O --> H2 + 2NaOH c. 2C2H6 + 7O2 --> 4CO2 + 6H2O d. H2O + CO2 --> H2CO3 Any help would be appreciated, thank you in advance!

8. ## physics

For a scene in a movie, a stunt driver drives a 1.50×10^3kg SUV with a length of 4.00m around a circular curve with a radius of curvature of 0.333 km. The vehicle is to be driven off the edge of a gully 10.0 m wide, and land on the other side 2.96 m below

9. ## AP Chemistry

A typical bathtub can hold 93 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 60◦F to 99◦F. Assume that the natural gas is pure methane(CH4) and that the products of

10. ## Chemistry

Use activity coefficients to find the concentration of hydrogen ions in a solution of 75.0 mM butanoic acid and 0.01 M NaCl. The ionization constant of butanoic acid is Ka = 1.52 × 10-5. Take the size of C3H7COO– to be 500 pm. What is the concentration

11. ## Math

The area of a circle is found with the formula A= 3.14r2 where 3.14 represents 3.14. If a tile artist is placing tiles in a circular mosaic pattern and the area of the circle is 658 square feet what is the approximate radius of the circle in feet?

12. ## AP Chemistry

How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 9.6 liters against a constant external pressure of 0.0100 atm answer in units of joules

13. ## Need Help with Math?

1. Translate P(4,0) right 3 units and up 5 units. Give the coordinates of the image point. (-5,1) (1,-5) (5,7) (7,5) 2. Point A(6, -2) is reflected over the x-axis. Write the coordinates of A'. 6,2 6,-2 -6,2 -6,-2

14. ## Discrete Math

How many friends must you have to guarantee that at least five of them will have birthdays in the same month?

15. ## chemistry

When doing an experiment with a calorimeter why is important to keep the lid on?

16. ## physics

It is important to be as far away from the cliff as possible before opening the parachute. How far from the cliff is this jumper when she opens her chute?

17. ## Physics

The person in the drawing is standing on crutches. Assume that the force exerted on each crutch by the ground is directed along the crutch, as the force vectors in the drawing indicate. If the coefficient of static friction between a crutch and the ground

18. ## physic

A ball is shot from the top of a building with an initial velocity of 16m/s at an angle θ = 43∘ above the horizontal. Part A What are the horizontal and vertical components of the initial velocity? If a nearby building is the same height and 55m away,

19. ## chemistry

Complete combustion of 8.80 g of a hydrocarbon produced 27.1 g of CO2 and 12.5 g of H2O. What is the empirical formula for the hydrocarbon?

20. ## Geography (Ms. Sue)

1). What are two important unifying forces in Central Asia? A: Two significant unifying forces in Central Asia are language and religion, such as Islam. 2). What former Soviet republics are located west of Russia? A: Belarus, Moldova, Ukraine and the

21. ## Geography (Ms. Sue)

1). Some Russians have objected to the creation of new federal districts. Why might there be disagreement over the districts? A: There might be disagreement over the districts because the President of Russia hopes that the heads of the new federal

22. ## English

How do you know “Paul Revere’s Ride” is narrative poetry? It is a poem has a setting, characters, and conflict. It is prose that has rhyme and rhythm. It is a poem that uses sound devices. It is prose that has a protagonist and antagonist. I think

23. ## Math

At a pet store, Rhonda paid \$11.50 for 3 dog bowls and 4 bones. Kelly paid \$13 for 2 dog bowls and 8 bones. How much will Andrew pay for 4 dog bowls and 2 bones?

24. ## MITx: 8.01x Classical Mechanics

An object of mass m is released from rest at a height h above the surface of a table. The object slides along the inside of the loop-the-loop track consisting of a ramp and a circular loop of radius R shown in the figure. Assume that the track is

25. ## english

1. Which of the following sentences is correctly punctuated? A. The local police asked the F.B.I. to assist with the case. (B). Mr. Jones visited the YMCA before becoming a member. C. Mary remembered to buy milk didn't she? D. The company held it's annual

26. ## physics

A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 20.0 m. She pushes in a direction 28.0° below the horizontal. A 54.0-N frictional force opposes the motion of the cart.

27. ## physics

The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the wire exerts two forces vector T and vector T ' on this tooth in order to bring it back into alignment. If the forces have the same

28. ## psychology

Hi I need help with my homework, I wrote down my answers, just need you to check if their right. Thanks 1. which of the following is not a goal of psychology? A. Measurement **** B.Prediction. C. Control D. Intellectualism 2. psychologists need to decide

29. ## Physics

The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 59000 N. The lift force vector L generated by the rotating blade makes an angle of 21.0° with respect to the vertical.

30. ## Physics

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 22.0 m, how fast

31. ## chemistry

A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound? Below is what I tried, but don't know what to do next. Please

32. ## Physics

A 2.5 kg block sits on an inclined plane with a 30 degree inclination. A light cord attached to the block passes up over a light frictionless pulley at the top of the plane and is tied to a second 2.5 kg mass freely hanging vertically. The coefficients of

33. ## statistics

How many friends must you have to guarantee that at least five of them will have birthdays in the same month?

34. ## COMMON CORE MATH

SIMPLIFY THIS EXPRESSION -6K + 7K

35. ## physics

In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.36 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an

36. ## Geography (Ms. Sue)

1). Why were world leaders concerned about the security of nuclear weapons in Russia and the Republics after 1991? A: World leaders were concerned about security of nuclear weapons in Russia and the Republics after 1991 because the Soviet Union, which had

37. ## Physics

A small bead of mass m is constrained to move along a frictionless track as shown. The track consists of a semicircular portion of radius R followed by a straight part. At the end of the straight portion there is a horizontal spring of spring constant k

38. ## Physics

A spherical helium filled balloon is attached to a string that is fixed to the ground. the balloon has a volume of .30/4m^3 and helium has a density of .20 kg/m^3. What is the weight of the balloon and helium if the tension on the string is .8N? What is

39. ## Physics

A spherical helium filled balloon is attached to a string that is fixed to the ground. the balloon has a volume of .30/4m^3 and helium has a density of .20 kg/m^3. What is the weight of the balloon and helium if the tension on the string is .8N?

40. ## Geography (Ms. Sue)

1). How are the two conflicts in Georgia that you read about similar? A: The two conflicts are similar as they both resulted in violence and countless casualties? 2). Why did ethnic tensions in Russia and the Republics seldom result in armed conflict

41. ## Physics

A spherical helium filled balloon is attached to a string that is fixed to the ground. the balloon has a volume of .30/4m^3 and helium has a density of .20 kg/m^3. What is the weight of the balloon and helium if the tension on the string is .8N? What is

42. ## Algebra

Point E is located at (-2,2) and point F is located at (4, -6). What is the distance between E and F?

43. ## Geography (Ms. Sue)

Approximately how many miles separate Moscow and Khabarovsk?

44. ## Physics

A charge of 1nC is added to a spherical soap bubble with a radius of 3.0cm. What is the electric field strength just outside of the bubble? What is the electric field strength just inside of the bubble? The field experienced by each charge in the skin of

45. ## Physics

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for

46. ## math

Ram Dubey recently purchased a chain of dry cleaners in North Uttar Pradesh. Although the business is making a modest profit now, Ram suspects that if he invests in a new press, he could recognize a substantial increase in profits. The new press costs \$

47. ## COMMON CORE MATH

SIMPLIFY THE EXPRESSION 12R + 5 + 3R - 5

48. ## Physics

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for

49. ## Physics

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for

50. ## chemistry

Write the equation for the combination of magnesium and oxygen to form magnesium oxide, MgO.

51. ## Physics

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for

52. ## math

a vertical stick 2m long cast a shadow 1m long,at the same time a building cast a shadow 15m long.How tall is the building?

53. ## physics

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a

54. ## math

In how many ways can the 10 kids in my class be seated in a circle if John and Sam insist on being seated diametrically opposite each other and if Stacy and Roger also insist on being diametrically opposite each other?

55. ## physics

what are imp. long questions of 7th chapter of 9 e.m of physics of bise lahore.

56. ## history

what are some questions that i can research about the civil war? i already have: 1. How many people fought in the civil war? 2. How many soldiers died during the civil war?

57. ## Mathematical induction. I'm stuck. So far I have..

For all integers n ≥ 1, prove the following statement using mathematical induction. 1+2^1 +2^2 +...+2^n = 2^(n+1) −1 Here's what I have so far 1. Prove the base step let n=1 2^1=2^(1+1)-1 False. Someone else suggested that the base step is :

58. ## math

y = -1/6 x + 5 identify the slope and the y-intercept of the equation.? how you would graph this line using the slope-intercept method. ? my teacher is saying im still getting the wrong answer:( please help

59. ## Geography (Ms. Sue)

1). What is the connection between the fall of the Soviet Union and the outbreak of ethnic conflicts in Russia and the Republics? A: ? 2). Why might ethnic tensions in the Caucasus be stronger than in other regions? A: Ethnic tensions in the Caucasus might

60. ## physics

An elevator in a tall building is allowed to reach a maximum speed of 3.61 m/s going down. What must the tension be in the cable to stop this elevator over a duration of 3 seconds if the elevator has a mass of 1370 kg including occupants?

61. ## physics

Pilots of high-performance fighter planes can be subjected to large centripetal accelerations during high-speed turns. Because of these accelerations, the pilots are subjected to forces that can be much greater than their body weight, leading to an

62. ## math

How could the height of a tall pine tree be estimated without climbing it and measuring it?

63. ## math

–x + 6y = 30 y = -1/6 x + 5 how do I identify the slope and the y-intercept of the equation for the second one and change the equation into slope-intercept form for the first one? I will do the rest on my own thanks

64. ## gc chemistry - retention time

adjusted retention time is the time a species spends in the stationary phase. its the total time it takes the species to elute minus the time it takes for an unretained species to elute. corrected retention data accounts for the change in pressure from the

65. ## physics

In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 42 m/s (around 90 mi/h) in a time of 7.3 s. The mass of the car and riders is 5700 kg. Find the average net force exerted on the car

66. ## AP Chemistry

Convert 8.3×10^5 cal to kiloJoules

67. ## Algebra

Which of the triangles described in the table is a right triangle? side 1 side 2 side3 q 25 20 15 r 26 20 46 s 25 20 1025 t 25 26 650 I think that it is R

68. ## CHEMISTRY

A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound?

69. ## Beginner French Work check

Hello! Just wondering if someone could check my work as there were a few areas that i'm not completely confident about. Thank you so much! Complete the sentence with the correct form of the verb in the future. Elle ___sera venu_____ (venir) chez moi ce

70. ## physics

Judy, by chance, spots a potted plant falling outside the window at 3.14 m/s.Further down the same building, Judy’s boyfriend clocks the pot at 53 m/s.How far apart are the friends? The acceleration of gravity is 9.8m/s2.

71. ## Algebra Help

Factor: 49^2+112r+64 =

the measures of the2nd angle of a triangle is 20degree more than the complements of the first triangle and the 3rd angle is 4 degree less than half the supplement of the 1st.find the measure of each angle

73. ## chemistry

A 1.213g sample of an unknown weak monoprotic acid was titrated to the endpoint with 27.25mL of a 0.3016M NaOH Calculate: -the number of moles of base reacted. -the number of moles of acid originally present. -the molar mass of the acid.

74. ## Biology

After adolescence, bones stop growing longer. They do however continue to grow. How do bones remodel and undergo repair

75. ## math

In how many ways can 4 boys and 4 girls sit around a circle table if each boy sits between two girls?

76. ## PHYSICS!!

I've tried this problem again and again using conservation of momentum and energy but I am not having any luck: A ball of mass 0.300kg that is moving with a speed of 8.0m/s collides head-on and elastically with another ball initially at rest. Immediately

77. ## Geography (Ms. Sue)

On what river does Russia's capital lie? My textbook states that it lies upon the Moscow River, but I am still uncertain.

78. ## Intro to Computers

In computing, a single byte represents a. one unit of disk space b. a pixel on the monitor c. an on or off electronic switch d. a character of data

79. ## physics

a train goes into a tunnel at 20m/s and emerges from itat 55m/s. the tunnel is 1500m long.assuming constant acceleration the time for which the train moves in tunnel is

80. ## Fluid Mechanics

Consider a flow whose velocity field is given by u = y, v = −x The streamlines are circles centered at the origin, and this flow is an example of a solid-body rotation. As shown in the figure, a small square fluid element is placed at the point

When planting trees in a forest, the US Forest Service recommends giving each seedling about 1/200 acre on which to grow. About how many seedlings should be planted in 1/3 of an acre? 1/3 times 200/1?

82. ## physics

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a

the measures of the2nd angle of a triangle is 20degree more than the complements of the first triangle and the 3rd angle is 4 degree less than half the supplement of the 1st.find the measure of each angle

84. ## Physics

If the visible part of an ice berg is 50mx50m in area and 20m is above the surface, what is the height, h? I tried using FB=FG but I don't get anywhere. Can anyone help me out?

85. ## ALGEBRA

Suppose that f(x)is a polynomial with integer coefficients, such thatf(n)is a multiple of n, for all positive integers n.What is the constant term of f(x)

86. ## motion,physics

Model rockets are lightweight rockets powered by very small engines. A typical model rocket has a mass of 5g.Similarly, a typical "class C" model rocket engine can produce a total impulse of 10 Newton-seconds. We usually launch model rockets vertically,

87. ## algebra

he sum of the measure of the two vertical angles is 10 times the measuresof the supplement of oneof the angle find the measure of one of the vertical angles

88. ## Algebra

Solve for b Y=(5/8)b + 10

89. ## Grammar

Is this right? I was wondering if you received the forms yet. correct tense??

90. ## algebra

solve 1/3(2x-5)=3

91. ## Math

Solve the set of linear equations by the matrix method : a+3b+2c=3 , 2a-b-3c= -8, 5a+2b+c=9. Sove for a

92. ## Calculus

Solve: dy = [2+(y-2x+3)^0.5]dx The answer in the book is 4(y - 2x + 3) = x^2 + C, but I don't know how to solve. I've tried solving, but this ODE is not exact, nor homogeneous and I don't think the method of integrating factors apply either. Please help.

93. ## Fluid Mechanics

Consider the 2D, incompressible, steady flow between parallel walls, the bottom wall is stationary and the top one is moving at a constant velocity Uw. The pressure is constant. Assuming the flow is fully developed (i.e. independent of x), we can write

94. ## PHYSICS

Model rockets are lightweight rockets powered by very small engines. A typical model rocket has a mass of 5g.Similarly, a typical "class C" model rocket engine can produce a total impulse of 10 Newton-seconds. We usually launch model rockets vertically,

95. ## Bio3

You want to dilute 10M sulfuric acid to make 500mL of 1M sulfuric acid. How much 10M sulfuric acid should you measure?

96. ## algebra

Suppose that f(x)is a polynomial with integer coefficients, such thatf(n)is a multiple of n, for all positive integers n.What is the constant term of f(x)

98. ## Math

Jim wants to plant pansies in his new planter. How much potting soil should Jim buy? Round to the nearest centimeter. Hint: The height is 100 cm and the diameter is 40 cm. My teacher said to use a specific formula. Out of that formula I got 125,664, but I

99. ## math

Sketch the sets of complex numbers that would satisfy the following equation: |z| > 3 Explain in detail how the graph will look like. Thanks.

100. ## Child care

What fundamental motor patterns do girls attain quicker than boys

101. ## indian springs

a tiger chases a horse 36m ahead of it and travels a distance of 4m in 5s after the chase started.after 10s the distance between them is

102. ## Physics

a safety harness is connected to a cable with a report breaking stress of 800MNm2. what mass could be hung from a harness if the diameter of the cable was 6mm. how do I work this out?

103. ## ALGEBRA

How many ordered triples of complex numbers(a,b,c) are there such that a^3-b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]

104. ## English

What is the participle in the participle phrase italicized below? Refusing to settle for less (italicized), the girl kept searching for her job. A. refusing B. settle C. for D. less A What does the compound word foremost mean based on what you know about

105. ## English

Read the following passage from “The Oxcart”: The governor of Settsu had three outstanding samurai in his service. Their names were Taira no Hidemichi, Taira no Suetake, and Sakata no Kintoki. Once in late fall, when the time of the Kamo festival was

the sum of four angles about a point is 360degree.the measure of the 2nd angle is 6degreemore than 3times the 1st,the measure of the 3rd is 3degree more than twice the first,the measure of the 4th is 20 degree less than the 3rd.what is the measure of each

107. ## algebra, math

How many ordered triples of complex numbers(a,b,c) are there such that a^3- b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]

108. ## Criminal justice

What is the Actus reus and men's real of burglary?

109. ## Biology

If a person has a herniated disk, sometime surgery can relive the pain that is associated with the condition. One side effect can be a loss of spinal flexibility. Why does this occur?

110. ## physics

A boat of mass 120 kg floats in a stream. You push on the boat with a pole, exerting a force of (175 i hat - 145 j hat) N. The boat moves through a displacement dvec = (23.0 i hat - 8.0 j hat) m along a straight line.

111. ## Math

(-8) to the power of -6

112. ## maths

Find the distance between (–6, 4) and (0, –4).

If a firm has a current ratio of 2.00it means that for every \$2 in _____it has \$1in A.total assets;current liabilities B.current assets;current liabilities C.total assets ;total liabilities D.current assets;total liabilities My answer is c Team diversity

find the asymptotes for the following inverse function(VA is X and HA isY) y=7/(x) -4 i get VA: x=0 ,and HA :-4

115. ## econs

what is home economy

116. ## Disney channel auditions

How come I never get picked to be on one of the Disney channel shows, is it because I'm overweight?

117. ## math-complex numbers

If z = -3+4i, determine the following related complex numbers. a)vector z b)3(vector z) c) 1/(vector z) d) |z| e) |vector z| f) (vector z)/(|z|^2)

118. ## ALGEBRA

How many ordered triples of complex numbers(a,b,c) are there such that a^3-b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]

119. ## Genetics

The following is pulse-chase experiment was performed as in Okazaki’s experiment, but in an organism as follows (all other as in regular replication): • One linear chromosome • 2 origins of replication spaced 50Kb apart, one firing at t=0 and one in

120. ## ha

An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 × 10È³Ê joule seconds, the speed of light is 2.998 × 10§ m/s)

121. ## math

How many ordered triples of complex numbers(a,b,c) are there such that a^3- b,b^3-c,c^3-a are rational numbers, and a^2(a^4+1)+b^2(b^4+1)+c^2(c^4+1)=2[{(a^3) b}+{(b^3)c}+{(c^3)a}]

122. ## gc chemistry

What affects peak shape in gc? I know peak area is proportional to the amount of a species and tailing occurs due to adsorption of polar species. Also fronting can occur if too much sample is added but these are the only things i can think of that would

123. ## geomerty

what form of symmetry does a equilateral triangle and a round button have?

124. ## plss answer fast math algebra

the ratio of the measure of the complementsof two angle is3:4while the ratio of the measure of their supplements is 9:10 find the measure of each angle.

125. ## Biology

If a person has a herniated disk, sometime surgery can relive the pain that is associated with the condition. One side effect can be a loss of spinal flexibility. Why does this occur?

126. ## Math

In a round robin tournament with N teams, every 2 teams play in a head-to-head match. Points are awarded as follows: 3 points for a win, 1 points for a tie and 0 points for a loss. What is the smallest value of N, such that it is possible for all the teams

127. ## Music

Hw can music change life 800words

128. ## artist

who is juten is he a artist