# Questions Asked onMarch 27, 2010

1. ## Buffer solution

Solve an equilibrium problem (using an ICE table) to calculate the pH. a solution that is 0.205 M in CH3NH2 and 0.110 M in CH3NH3Br. i used th Ka of CH3NH2 and set up the problem as Ka=[H3O][CH3NH2]/[CH3NH3Br], but that was wrong. So i switched the

2. ## physics

A small piece of cork in a ripple tank oscillates up and down as ripples pass it. If the ripples travel at 0.20m/s, have a wavelength of 15mm and an amplitude of 5.0mm, what is the maximum velocity of the cork?

the expression cos4x cos3x + sin4x sin3x is equivalent to which one of the following is the answer: 1) sinx 2) sin7x 3) cosx 4) cos7x

4. ## statistics

Use the Standard Normal Distribution table to find the indicated area under the standard normal curve. Q1: Between z = 0 and z = 2.24 A1: 0 = 0.5000 2.24 = 0.9875 0.9875 – 0.5000 = 0.4875 Q2:To the left of z = 1.09 A2: 0.8621 Q3: Between z = -1.15 and z

5. ## physics

A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre

6. ## Pre-Cal

Express the function in the form f(x) = (x-k)q(x) + r for the given value of k. f(x) = 15x^4 + 10x^3 - 6x^2 + 14 Value of k = -2/3 I do not understand what I am suppose to do!

7. ## trig

Prove that tan4x=(4tanx-tan^3x)/(1-6tan^2 x+tan^4 x) *note: the exponents are just numbers. there are no variables in the exponents.

8. ## PHYSICS

A steam turbine operates between hot and cold reservoir temperatures of 538.0 ¢XC and 92.1 ¢XC, respectively. If heat is supplied at a rate of 238.0 MW, what maximum amount of power could the turbine deliver?

9. ## astronomy

Retrograde motion describes the backward motion of the stars relative to earth

10. ## chm152

Consider the equilibrium of water with gaseous hydrogen and oxygen: Give the value of for this reaction, if it is written as: Choose one answer. a. -7.8 x 10^-16 b. -3.9 x 10^-16 c. 1.3 x 10^-15 d. 6.4 x 10^-14 e. 3.6 x 10^2

11. ## chm152

When solid NH4HS is placed in a closed flask at 28 C, the solid dissociates according to the equation: NH4HS(s) NH3(g) + H2S(g) The total pressure of the equilibrium mixture is 0.766 atm. Determine Kp at this temperature. Choose one answer. a. 0.147 b.

12. ## Chemistry

The equation for the complete combustion of ethene (C2H4) is C2H4(g) + 3 O2(g) ==> 2CO2(g) + 2H2O(g) If 2.70 mol C2H4 is reacted with 6.30 mole O2, identify the limiting reagent. show all work.

13. ## Physics 121

A bicycle wheel has a radius R = 32 cm and a mass M = 1:80 kg which you may assume to be concentrated on the outside radius. Assume that you apply a force F to a sprocket so that the wheel has an angular acceleration ® = 4:50 rad/s2. A resistive force f =

14. ## Chemistry

What is the percent yield if 4.65g of copper is produced when 1.87g of aluminum reacts with an excess of copper(II) sulfate? 2Al(s)+3CuSO4(aq)==>Al2(SO4)3(aq)+3Cu(s)

15. ## Chemistry

Predict the products and write a net ionic reaction for the reaction of cadmium chloride and ammonium sulfide.

Business Law Exam 210 True Or False questions. 1. Both "commom law: contracts and UCC contracts are subject to the plain menaing rule only if they are simple and plain contracts. 2.when a term in a contract is ambiguos, it is generally interpreted in favor

17. ## Statistics

How does the law of large numbers affect you as a gambler in a casino? As the owner of the casino? Why do people still patronize casinos? How is the law of large numbers relevant to healthcare studies?

A circle has a radius of 4 inches. In inches, what is the length of the arc intercepted by a central angle of 2 radians? which of the following is the answer: 1) 2 radian 2) 2 3) 8 radian 4) 8

If a nickel contains 3.0 gram of copper and 1.2 gram of nickel How many kilograms of copper must be combines with 500 kilograms of nickel to make nickel coins?

20. ## Math

If a nickel contains 3.9 gram of copper and 1.2 gram of nickel How many kilograms of copper must be combines with 500 kilograms of nickel to make nickel coins?

21. ## physics

A car initially traveling at 31.0 m/s undergoes a constant negative acceleration of magnitude 2.00 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires

22. ## Physics

A small fish is inside a spherical bowl filled with water (n=1.33). The bowl has a diameter of 30cm and the fish is at a distance of 5cm from the surface that separates water and air (ignore the effects of the glass of the bowl). The image of the fish is

23. ## Chemistry

When you balance equations, do you treat polyatomic ions as one unit or treat the different elements in the ion separately? Because if you treat them as one unit, then what if the elements get separated in the products side of the equation?

24. ## physics

Are fat fish more likely to have broad stripes than thin fish? 7. Answers: Yes No 8. Reasons: Some fat fish have broad stripes and some have narrow stripes. 3/7 of the fat fish have broad stripes. 12/28 are broad striped and 16/28 are narrow striped. 3/7

25. ## astronomy

The great galaxy in Andromeda has an angular diameter along its long axis of about 5 degree. Its distance is about 2.2 millons light years. What is its linear diameter.

26. ## window XP

Which of the following is true of the Encrypting File System (EFS)? a. The Encrypting File System provides encryption for data files stored locally using the file systems supported by Windows XP Professional. b. If the file owner loses the private key used

27. ## window XP

Windows XP Professional can accommodate the addition and removal of many types of devices. The installation of a device results in the installation of drivers and allocation of resources. Subsequent removal of the device can result in this information

28. ## algebra

A farmer decides to enclose a rectangular garden, using the side of a barn as one side of the rectangle. What is the maximum area that the farmer can enclose with 100 ft. of fence? What should the dimensions of the garden be to give this area? The max.

29. ## Math

use the given information to solve the triangle. C= 85 degrees 20' a = 35 c = 50 I know that I have to find A,B,b but I do not know how to do this.

30. ## algebra

E = ic sq, solve for c

31. ## algebra

give exact and approximate solutions to three decimal places (x-5)sq = 18

32. ## Calculus

Use differentials (or, equivalently, a linear approximation) to estimate the given number. sqrt100.4

Complete the table below for both the United Nations and World Trade Organization by providing a description of the Purpose, Major Functions, and Current Members for each organization.

34. ## math

6x-4y=20 and 4y-6x=-20 What is the solution of the system of equations for this problem? A)A point B)No solution C)Infinitely many solutions

35. ## science

How to find oxidation number on redox reactions

36. ## science

I have these pictures and i have to say which gestalt lawis illustrated, i know some of them are examples of figure/ground which is considered a principle but i don't know if principles are concidered laws(laws which includes similarity, continuity,

37. ## math-multiplying

3/1 * (6/5) = 3 and 3/5 is this the correct answer?

38. ## math

Bert is planning to open a savings account that earns 1.6% simple interest yearly. He wants to earn exactly \$240 in interest after 3 years. How much money should he deposit?

39. ## college

Bayside insurance offers two health plans. Under plan A, Giselle would have to pay the first \$160 of her medical bills, plus 25% of the rest. Under plan B, Giselle would pay the first \$200, but only 20% of the rest. For what amount of medical bills will

40. ## Math

Mary brought home 1/2 dozen eggs. He accidently dropped the carton on the flor and 1/3 of the eggs broke. How many eggs does she have left?

41. ## Math

The radius needed to create a sphere with a given volume V can be approximated by the equation r = 0.6(V)^1/3. Find the radius of a sphere with a volume of 729 cubic meters. Round the answer to the nearest hundredth.

42. ## Math

What is the midrange of {6,7,8,9,10,12,15,15,20,28}

43. ## Math

Solve 9(w-2)=-18 9w-18=-18 9w=0 w=0 Is this correct?

44. ## chemistry 121

Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by moisture in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Suppose that the microwave radiation has a

45. ## math help plz!

DigiCom wants to drop the effective rate of interest on its credit card by 2%. If it currently charges a nominal rate of 8% compounded daily, at what value should it set the new nominal rate? Note: Please make sure your final answer(s) are in percentage

46. ## english

I am trying to do a definition paragraph and was wondering if this would be good on A FRIEND TO ALL topic. please help. A friend to all is essential in all friendships and is someone we can share our thoughts, feelings and gives us support. My opinion on a

47. ## math

Solve for the indicated letter c=9d, for d I am not sure I understand this question can someone help

48. ## plz help=math

Early last year, the Zoe Growth Fund ran advertisements in the financial pages of major newspapers. The "ad" had primarily empty space containing the simple message: \$20,000 INVESTED IN ZOEINVESTMENT GROWTH FUND IN 1962 WOULD BE WORTH \$9.40 MILLION TODAY

49. ## physics

Entropy of melting A block of a certain substance (m = 0.3 kg) sits in a cold room at its melting point 170 K. A lab demonstrator supplies heat at a rate of 200 W for 140 seconds by focusing light on the block to (just) completely melt the block. (a) What

50. ## physics

The diffusion coefficient for calcium ions crossing a biological membrane 10nm thick is 300 micrometers squared/second and the concentration difference of calcium ions across the membrane is 400 mol/m^2 (Molar mass of calcium is 40 kg/mol) Determine the

51. ## Math

Solve the equation: (-3/p+2) = (-8/p-3) Can someone please show me how to do this? I have a whole page of these to do but I don't really know what to do. If I could just see one done, I'm sure I can figure the rest out. Thank you.

52. ## social studies

Rhetorical devices on a person idea or ideology

use the given information to solve the triangle. C= 85 degrees 20' a = 35 c = 50 I know that I have to find A,B,b but I do not know how to do this.

54. ## chemistry

Q.1 What will be the pH at the equivalence point during the titration of a 100 ml 0.2M solution of CH3COONa with 0.2M of solution of HCl?(Ka = 2*10^-5) Q.2 Aniline behaves as a weak base.When 0.1M,50ml solution of aniline was mixed with 0.1M,25ml solution

55. ## Spanish

Rita lleva al aeroporta y tambien lleva a Tomás. I don't understand what is meant by this sentence. Lleva means he or she carries, aeroporta means airport. Is Rita carrying something to the airport? How would I know this? How can she carry Tomás? Thanks!

57. ## English

What do you think about the movie. 1. I thought it was really fun. 2. I thought it was real fun. 3. I thought it was really funny. 4. I thought it was real funny. 5. I thought it was great fun. 6. I thought it was really fun. 7. I think it was a great fun.

58. ## science

Exercise 2. Starting with a hypothetical population of 14,000 people and an even age distribution (1,000 in each age group from 1-5 to 66-70 years), assume that the population initially has a total fertility rate of 2.0 and an average life span of 70

59. ## English

How do you pronounce 'Eminem'? Is it a male name or a female name?

60. ## English

1. Why do you not like becoming a journalist? Because I want to become an office worker. 2. Why don't you not like becoming a journalist? Because I want to become an office worker. (Are both questions the same? Are the answers suitable for each question?)

61. ## math

The equation y = -1777x+27153 can be used to predict the number y of gun deaths in the United States x years after 20000, that is, x=0 corresponds to 2000, x=3 corresponds to 2003, x=5 corrresponds to 2005 and so on. Predict the number of gun deaths in

62. ## Chemistry

A sample of gas exerts a pressure of 5.12 atm. What is the pressure of this gas expressed in torr? (3 significant figures, n.nnEn)

63. ## math-word problem

In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data

64. ## trig

(tanx+cotx)over(tanx-cotx)=(1) over sin^2x-cos^2x)

65. ## math

5x+2y=8 2x+5y=1 is this parallel, perpendicular or niether?

66. ## trig

solve the equation 2 tan^2(theta)sin(theta)-tan^2(theta)=0 interval[0,360)

67. ## chemistry AP

methyl red has the following color changes red 4.2 -8.3 yellow a)write the ionic equilibrium equation b) If a small quantity of methyl red is placed in a solution with a pH of 4.5 . calculate the approximate value of [In]/[HIn]. What colour would be

68. ## statics

One force of 10k going NEtowards a point(A) at an angle of 40 degrees another force (F2) going SE from pt(a) at slope of 3,4,5 triangle and F1 horizontal going W towards pt (a) find F1 and F2 i was using force triangle but got off track wasn't able to get

69. ## chemistry AP

You have to design a buffer based on one of the systems below System 1: HA1 and A1-1 K= 4 E-3 System 2: HA2 and A2-1 K= 5 E-4 System 3: HA3 and A3-1 K= 6 E-5 For the following parts assume that the buffer above in system2 has been constructed with [HA] =1M

70. ## letter format help

what is the format for an appeal letter for college disqualification.

71. ## math--simplify

Simplify -9[-15-(45-12)]=

72. ## chemistry

The mercury cell is still sometimes used in industry to prepare chlorine, Cl2, and caustic soda, NaOH. (a)In the first stage of the process a solution of sodium chloride is electrolysed using a voltage of 4.00V. Chlorine gas is obtained at one of the

73. ## Accounting

At October 31, Nathan Company made an accrued expense adjusting entry of \$1,400 for salaries. Prepare the reversing entry on November 1, and indicate the balances in Salaries Payable and Salaries Expense after posting the reversing entry.

74. ## physics

In the design of a passenger bus, it is proposed to derive the motive power from the energy stored in a flywheel. The flywheel, which has a moment of inertia of 4.0 x 10^2 kgm^2, is accelerated to its maximum rate of rotation 3.0 x 10^3 revolutions per

75. ## Microeconomics

Consider the market for taxi rides in a particular metropolitan area. a) Suppose that, when the price per mile increases by 40%, total miles demanded falls by 30%. Solve for the price elasticity of demand. b) Is the demand for taxi rides elastic or

76. ## physics

A special prototype model aeroplane of mass 400g has a control wire 8cm long attached to its body. The other end of the control line is attached to a fixed point. When the aeroplane flies with its wings horizontal in a horizontal circle, making one

77. ## Microeconomics

Consider Good E, which, when sold in a particular country, has an equilibrium price = \$10.00. The government of that country decided that it doesn’t like that equilibrium price, and so passes a law which prevents the product from selling for \$10.00.

78. ## Environmental Sci 275

· Post your response to the following: Reflect on your own worldview and compare it with the worldviews presented in the text. Provide examples of the benefits of your view to defend your position.

79. ## Psychology

Which color arrangement wouldcreate the deepest senseof space? A. red,orange,blue B. Green violet, blue C.Yellow, orange,yellow-orange D. Violet, blue-violet, red-violet What are the double split complement colors for blue-green?

80. ## physics

An open tank holds water 1.25 m deep. If a small hole of cross section area 3cm^2 is made at the bottom of the tank, calculate the mass of water per second initially flowing out of the hole. (g=10m/s^2, density of water= 1000 kgm^-3)

81. ## Statistics for Decision

Calorie Level Fiber Type High Calorie Low Calorie Totals High Fiber 18 4 22 Medium Fiber 23 6 29 Low Fiber 12 21 33 Totals 53 31 84 1. What is the probability that the cereal would be high calorie? In other words, what is P(high calorie)? 2. What is the

Explain how these parts of your organizations function, including the virtual communications equipment you use, the types of events—teleconferences, training, routine testing, and so forth–that are carried out via virtual communications and what works

83. ## macroenconomics

Between 1968 and 1980, the US economy experienced a slowdown in productivity growth. However, since the mid 1980s, the economy has experienced increases in the growth rate in productivity. Can you give reasons why US productivity growth started to increase

84. ## HSM240

I need an opinion please. My assignment says write 1,750- to 2,100-word proposal paper on a social program that you create. Pretend that you have the power and capacity to create an agency or organization and decide to create a new social program. Can you

85. ## math-elimination

3x+4y=5 6x+8y=10

86. ## math-word problem

In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data

87. ## chm152

Consider the following equilibrium: 5.0 moles of are placed in a 10.0 L flask at 200 C and allowed to come to equilibrium. Analysis shows that 1.0 mole of is present in the equilibrium mixture. How many moles of Cl2 are present at equilibrium. Choose one

88. ## English

Hi, i would like to ask How was Gatsby killed? He was floating in the swimming pool and George Wilson shot him but where

if you have a math problem that says which model correctly shows 2/3 of 12 circled? what does it look like?

find, to the nearest minute, the angle whose measure is 3.45 radians.

91. ## microeconomic

please show me how to calculate price elasticity of demand of \$3.00 increase to \$3.50

92. ## Algebra

5(r-9)+3>6(r+3)-26 {r/r_____ ______

93. ## microeconomic

how to calculate price elasticity of demand of \$3.00 to a increase to \$3.50 and explain your reasoning and interpret the results

94. ## U.S. History

What was the human hisory between North American Asia Eurasia and Europe before the 1450's?

95. ## physics help!!!

particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then

96. ## social studies

what sre the landforms, climate, and vegetation of the baltic coast?

97. ## Compound Interest

Swan Furnace Cleaners wants to add 0.50% to the effective rate of interest on its credit card. If it currently charges a nominal rate of 4.25% compounded semi-annually, at what value should it set the new nominal rate? The answer for this question is

98. ## Algebra 1A

1.You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an \$80,000 loan from your family and a \$38,250 small business loan. These loans must be repaid in full within

99. ## ORGANIC CHEMISTRY

Why do geminal protons that are adjacent to a stereogenic center give rise to two separate signals?

100. ## soc 402

What are some of the major causes of illiteracy and how can they be avoided?

I am currently outside USA. Now in Asia we follow the Cambridge igcse curriculum. If I move to USA can I still get into an Ivy League college?

102. ## Statistics

A gas station manager thinks the average motorist changes their oil less than the recommended two times per year. In a survey 15 car owners were asked how many times they changed their oil in the past year. Here are the results: 1 1 2 1 2 2 0 1 0 1 2 3 1 3

103. ## Statistics

Does setting alpha at .01, rather than at .05, increase or decrease the likelihood of rejecting Ho?

104. ## paralegal

What are the similarities and differences of federal and state systems?

105. ## Chemistry

How does the molar mass of molecules affect the boiling points? e.g MOlar masses HI-->127.9 HF--->20.07 HCl---> 36.45 Boling points HI-->-35.55 HF---> 20 HCl--->-114.17 can it be said that except for HF molecule, as molar mass increases the boling points

106. ## math

50% of what number is 35 would the answer be .50N=35?

107. ## math

solve the compound inequality 4>-2x+3 or 12

108. ## Physics

A converging thin lens made out of crown glass (n=1.52) has a focal length f=1.0m An identical lens (same radius for the spherical surfaces), made out of a high-index plastic with n=1.70 will be ... A. Converging with a focal length smaller than 1.0 m B.

109. ## Marketing

There are 1000 students in the University of A. A sample of 10 observations was obtained regarding the rating of the service quality of dining hall. Here is the sample: Observation Rating 1 5 2 6 3 7 4 3 5 8 6 5 7 6 8 3 9 4 10 7 calculate the confidence

110. ## soc 402

In what ways is the health problem affected by the family, the economy, and the polity?

111. ## Math

Swan Furnace Cleaners wants to add 0.50% to the effective rate of interest on its credit card. If it currently charges a nominal rate of 4.25% compounded semi-annually, at what value should it set the new nominal rate? The answer for this question is

112. ## physics

A steam turbine operates between hot and cold reservoir temperatures of 538 degrees celcius and 92.1 degrees celcius respectively. If heat is supplied at a rate of 238 MW, what maximum amount of power could the turbine deliver?

113. ## Chemistry

Are the intermolecular forces that are acting ont the molecule HF as follows: dipole-dipole, ionic and hydrogen bond

114. ## math

Figure the mean, median and standard deviation for the number of words learned by seven infants. I beleive the mean is 45.5 and the median is 10.The numbers are 10,12,8,0,3,40,and 18.

115. ## math

4,000,000-[(300,000)+x] = 147,000

116. ## math!

j=6.50% m=Daily(365) f(effective rate)=? f=(1+i)^n =(1+(.0650/365))^365 =1.067152848-1 =0.067152848 =6.72% i know how to find the "f" but if its j=? m=Quarterly(4) f=3.25% how do i find the "j"???

117. ## astronomy

A light bulb radiates most strongly at a wavelength of about 3000 nanometers. How hot is its filament?

118. ## astronomy

Explain the cause of the Earths' season. I need a diagram for my explanation

119. ## probability

what is the chance of getting the same number twice in a row, if there are 1000 numbers to draw from. what is the formula for this?

120. ## math help plz!

j=6.50% m=Daily(365) f(effective rate)=? f=(1+i)^n =(1+(.0650/365))^365 =1.067152848-1 =0.067152848 =6.72% i know how to find the "f" but if its j=? m=Quarterly(4) f=3.25% how do i find the "j"???

. John, Lesa, and Trevor form a limited liability company. John contributes 60% of the capital, and Lesa and Trevor each contribute 20%. Nothing is decided about how profits will be divided. John assumes that he will be entitled to 60% of the profits, in

122. ## science

When astronauts travel into space, they can still see Earth and the moon. why is this possible? A. The sun shines in the windows of their space vehicle. B. They view earth and moon through a telescope. C. The sun's light reflects off earth and the moon. D.

Use synthetic division to show that x is a solution of the third-degree polynomial equation, and use the result to factor the polynomial completely. List all the real zeros of the function. x^3 - 28x - 48 = 0 Value of x = -4 Please help!!Thank you

124. ## physics

(a) What is the tangential acceleration of a bug on the rim of a 6.0 in. diameter disk if the disk moves from rest to an angular speed of 79 rev/min in 5.0 s? m/s2 (b) When the disk is at its final speed, what is the tangential velocity of the bug? m/s (c)

125. ## trig

find the exact value given that cosA=(1/3) in quad I, sin B=(-1/2) in quad 4, and sin C=(1/4) in quad 2 tan(B+C) ? At the end of my equation I had (sqrt45/15) over (1-sqrt15/15) , how do I rationalize or did I make an error in calculation

126. ## Astronomy

The precession of the Earth its causes, and its ramifications

127. ## Physics

An ideal gas is squeezed slowly from state A (pressure-600 kPa, volume- 1 L) to B ( pressure-400kPa, volume- 0.5 L). What is the work done or received by the gas?

128. ## science

What is the definition of Gestalt theory, and whats the main facts about it?

129. ## Physics

Hey I'm lost on this physics problem can anyone tell me which equations i'm suppose to use in these questions a) A skier inhales a breath of air at Temp-air = 3.9 ¢XC and exhales it as Volume-air = 1.92 liters of air at Temp-body = 37 ¢XC and atmospheric

130. ## Math / Algebra

I would like to know if I got my answer right. I am supposed to find the LCM of 11(t-5)and 55(t-5). I thought that the answer was 11t-55 but I am a little bit lost can you please help me. Thanks

131. ## Math

give the domain of the function and identify any vertical or horizontal asymptotes. g(x)= 1 / x-3 + 1 My answer was x = o and y=3 but this was wrong. Please explain!!

132. ## Math

Solve 5/2X + 1/4X = 5/4 +X

133. ## Math

Can someone help me solve 0.7x+7

134. ## Astronomy

Does the = sign in the equation E=mc2 mean that energy and light are equivalent

135. ## math!

Swan Furnace Cleaners wants to add 0.50% to the effective rate of interest on its credit card. If it currently charges a nominal rate of 4.25% compounded semi-annually, at what value should it set the new nominal rate? The answer for this question is