# Questions Asked onOctober 1, 2010

1. ## - Physic college

The equation for the change of position of a train starting at x = 0 is given by x=1/2at^2 + bt3 . Find the dimensions of a and b. If y = C1 sin (C2 t) where y is a distance and t is the time. What are the dimensions of C1 and C2 ?.

2. ## Chemistry

What is the net ionic reaction of Barium Phosphate and Phosphoric Acid? I tried H + 2PO4 + 3Ba + OH -> Ba3(PO4)2 + H2O, and 6H + 2PO4 + 3Ba + 6OH -> Ba3(PO4)2 + 6H2O but the homework software says both are wrong. What is wrong with it?

3. ## College Calculus 1

A runner sprints around a circular track of radius 150 m at a constant speed of 7 m/s. The runner's friend is standing at a distance 300 m from the center of the track. How fast is the distance between the friends changing when the distance between them is

4. ## statistics

Suppose that the heights of adult men in the United States are normally distributed with a mean of inches and a standard deviation of inches. What proportion of the adult men in United States are more than feet tall? (Hint: feet inches.) Round your answer

5. ## Income Tax - Accounting. Help Me Please.

Tax Rates, latesha, a single taxpayer, had the following income and deductions for the year 2009. INCOME Salary \$60,000 Business Income \$25,000 Intrest income(bonds)\$10,000 Tax-exempt bond interes \$ 5,000 ________ TOTAL INCOME \$100,000 DEDUCTIONS: Business

6. ## chemistry 101

How many grams of NaCl are dissolved in 250 grams of normal saline solution

7. ## Physics -Spring Momentum

A spring has a relaxed length of 6 cm and a stiffness of 50 N/m. How much work must you do to change its length from 8 cm to 11 cm?

8. ## English

Macbeth; Act III. How does the banquet scene blur the clear-cut and common-sense distinction that most of us make between the real and the imaginary? In what other scenes has this distinction also been blurred?

9. ## physics

A force of 36.1 N is required to start a 4.0 -kg box moving across a horizontal concrete floor. If the 36.1 N force continues, the box accelerates at 0.71 m/s^2. What is the coefficient of kinetic friction?

10. ## Related Rates Problem

A runner sprints around a circular track of radius 150 m at a constant speed of 7 m/s. The runner's friend is standing at a distance 300 m from the center of the track. How fast is the distance between the friends changing when the distance between them is

11. ## algebra

please check my homework c1. Solve 3x – 19 = 2 Ax = -17 Bx = -17/3 Cx = 7 Dx = -51 Ex = 20 Fx = 18 b2. Solve 4x + 12x = 62 + 4(11) Ax = 7 Bx = 5 Cx = 35 Dx = 64 Ex = 11 Fx = 7/2 e3. Solve 8x – 7 = x + 10 Ano solution Bx = 1/3 Cx = 1/10 Dx = 3/7 Ex =

12. ## English

I looked at the website that was given to me last night. Can someone please tell me if my answers are right or wrong. Thank You Is this an example of imagery: Mrs. Wyman is so sweet sometimes you swear you can smell muffins baking. Is this an example of

13. ## chemistry

A solution was prepared by dissolving 43.0 of in 225 of water. Calculate the mass percent of in the solution.

14. ## Science

1. What is the direction of charge flow when charging a capacitor? When discharging a capacitor? What is your evidence? 2. Consider a circuit with a capacitor, battery, wire, and bulb. Describe the source(s) of charge during capacitor discharging. 3. Using

15. ## physics

The roller-coaster car shown in Fig. 6-41 (h1 = 50 m, h2 = 11 m, h3 = 30 m), is dragged up to point 1 where it is released from rest. Assuming no friction, calculate the speed at points 2, 3, and 4

16. ## Physics

An airplane has a velocity of 454 km/h relative to the moving air. At the same time, a wind blows northward with a speed of 99 km/h relative to earth. The airplane is moving in an easterly direction relative to earth. Find the speed of the airplane to

17. ## Physics

A tennis player strikes a ball when it is 1.1 m above the ground, with a velocity 20 m/s at 17 degrees above the horizontal. The net is 8 m away horizontally and it is 0.5 m high. How high, vertically, above the net does the ball pass?

18. ## college chemistry

what is the theoretical percent of water in CuSO4 x's 5H2O?

19. ## Organic Chemistry

separation and purification scheme how would i begin this? we have a mixture of the following:50% benzoic acid, 40% benzoin, 10% dibromobenzene they give us 1M NaOH, 6M NaOH, 1M HCl, 6M HCl, 1M NaHCO3, saturated sodium chloride, diethyl ether, 95% ethanol,

20. ## HISTORY

During the early part of the war, Lincoln's main goal was to.. A.)reduce the power of the states. B.)preserve the Union. C.)stop the spread of slavery. D.)free the slaves.

21. ## Math

Ali did his homework at school with a graphing calculator. He determined that the equation of the line of best fit for some data was y=2.63x-1.29. Once he got home, he realized he had mixed up the independent and dependent variables. Write the correct

22. ## statistics

If 80% of the applicants are able to pass a driver's proficiency road test, find the mean, variance, and standard deviation of the number of people who pass the test in a sample of 300 applicants.

23. ## Calculus

A runner sprints around a circular track of radius 150 m at a constant speed of 7 m/s. The runner's friend is standing at a distance 300 m from the center of the track. How fast is the distance between the friends changing when the distance between them is

24. ## Chemistry

Calculate the solubility of LaF3 in grams per liter in the following solutions. The Ksp of LaF3 is 2.01 e-19. (a) pure water (b) 0.051 M KF solution (c) 0.065 M LaCl3 solution

25. ## EARTH science

A 100-gram rock has a volume of 35 cubic centimeters. Find the density of the rock.

26. ## Chemistry

A solution contains the following ions: Hg2(2+) and Fe(2+). When potassium chloride is added to the solution, a precipitate forms. The precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no precipitate. When

27. ## physics

determine the following distances based on the sonar data given. a ship sends a sound pulse downward and receives the reflected sound 2.50 s later. use the formula d=vt. assume the speed of sound in sea water is 1540 m/s

28. ## physics

An 85 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 81 cm. What is the speed of the arrow as it leaves the bow?

29. ## Income tax / Accounting

Computation of taxable income: The following information for 2009 relates to Tom, a single taxpayer, age 18. Salary \$1,800 Intrest income \$1,600 Itemized deductions \$ 600 A. Compute Tom's taxable income assuming he is self-supporting B. Compute Toms's

30. ## chemistry

I did 3 Experiments and got 3 rate as the following: Exp1: (S2O8)2-:0.05M; I-:0.05M rate:1.7x10^-5 M/s Exp2: (S2O8)2-:0.10M; I-:0.05M rate:3.4x10^-5 M/s Exp3:(S2O8)2-:0.05M; I-:0.10M rate:3.6x10^-5 M/s what effect does doubling [(S208)2-] have on the rate?

31. ## calculus

Let f(x)=2.2 3x. Estimate the derivative f'(2.3) to within two decimal places by using a small enough interval.

32. ## English

In the first paragraph, underline all common nouns once and proper nouns twice. In the second paragraph, underline two pronouns. In the third paragraph, underline one action verb once, underline a helping verb twice, and circle a linking verb. In the

33. ## Physics Help!

A force of 36.1 N is required to start a 4.0 -kg box moving across a horizontal concrete floor. If the 36.1 N force continues, the box accelerates at 0.71 m/s^2. What is the coefficient of kinetic friction? I got 0.072 as my answer and this is showing as

34. ## Sociology

Use the functionalist, conflict, and interactionist perspectives to assess the effects of global TV programming on developing countries.

35. ## matj

The difference of two numbers is 12. Two fifths of the greater number is six more than one-third of the lesser number. Find both numbers.

36. ## Finance

Hooks Athletics, Inc., has outstanding a preferred stock with a par value of \$30 that pays a dividend of \$2.50. The preferred stock is redeemable at the option of the stockholder in 10 years at a price equal to \$30. The stock may be called for redemption

37. ## calculus

Let f(x)=x^3+3. Estimate the following to within two decimal places by using small enough intervals.

38. ## Language Arts

four definitions of the word nice that you would use in a paragraph to develop this topic sentence: "The word nice is surprisingly ambiguous"

39. ## Physics

A descent vehicle landing on Mars has a vertical velocity toward the surface of Mars of 6.0 m/s. At the same time, it has a horizontal velocity of 3.5 m/s. At what speed does the vehicle move along it's decent path? At what angle with the vertical is this

40. ## home economics

what are the advantages and disadvantages of a butcher and a fish monger

41. ## inorganic chermistry

(a)explain why the colour for ions in the flame tests differ (b)Why do the chemicals have to be heated in the flame first before the colour light is emitted?

42. ## physics

a golf ball released from a height of 1.5 m above aa concreate floor bounces back to a height of 1.1m if the ball is in contact with the floor for .62 ms what is the average acceleartion of the ball while in contact with the floor?

43. ## biology

The only thing my biology teacher told us about the NADP (in photosynthesis light dependent reaction) is that it's a bus driver. Why is it a bus driver? Is it cos it collects the H+ ion into the light independent reaction (NADPH) then "drops" it off and

44. ## college chemistry

1) If 740. mL of 0.06622 M aqueous NaI and 370. mL of 0.07151 M aqueous Pb(NO3)2 are reacted stoichiometrically according to the equation, what mass (g) of NaI remained? Pb(NO3)2(aq) + 2 NaI(aq) → PbI2(s) + 2 NaNO3(aq) 2) If 180 mL of 0.581 M aqueous HCl

45. ## inorganic chermistry

what is the characteristic flame for sodium,lithium,barium,copper and calcium?explain why

46. ## chem

1. what is the quantum numbers of the last electron of Sb?(n= l= ml= ms=) and why the answer are this number? 2.how many electrons would be found in the n=6 level if all possible orbitals were completely filled with electrons? how to calculate this one?

47. ## Algebra

We're doing multi-step equations, and I need help on how to check my answers? I knew how to do it on two-step equations, but now it's kind of confusing? for example, there's a problem, 6a-1 over 7 = 1 My answer was 4/3. We're supposed to insert our answer

48. ## college physics

eng physics a rock is dropped at sea cliff at the sound of it striking the ocean if head 3.4 seconds later. If the speed of sound is 340m/s how high is the cliff?

49. ## math

Estimate f′(−3) where f(x) = x^3 + 8x^2 − 10x − 1 to within one decimal place by using a small enough interval. f′(−3) ≈

50. ## Physics

A block of mass m_1 is connected by a string over a pulley to a block of mass m_2 that is sliding on a flat table. The string is light and does not stretch; the pulley is light and turns without friction. The coefficient of friction between the sliding

51. ## Math

The points A(1, -2, 4), B(3, 5, 7), C(4, 6, 8) are three of four vertices of parallelogram ABCD. Determine the coordinates of vertex D Could someone please tell me to go about solving this question. Thanks a lot.

52. ## spanish

a response to this question ¿Eres la nieta de los señores?

53. ## econ

1. A bank has \$120 million in total assets, which are composed of reserves, loans, and securities. Its only liabilities are \$120 million in transactions deposits. The banks exactly satisfies its reserve requirement, and its total reserves equal \$6 million.

54. ## physics

Determine the net force necessary to give an object with a mass of 2.1 kg an acceleration of 3.5 m/s2.

55. ## stats

You are a share analyst for an investment firm and are investigating the return on shares in the Eastern Mining Corporation over the last four years. The return on Eastern Mining Corporation shares over the last four years is presented. Calculate the

56. ## ap chemistry

Calcu- late the mass of pure acetic acid in 440 mL of this solution at 20 C. Answer in units of g.

57. ## math

The perimeter of a quadrilateral is 56. The lengths of three consecutive sides are 9, 13, and 16. What is the length of the fourth side?

58. ## physics

Sooo... Isaac kicks a soccer ball 11.5 m/s at an angle of 41 degrees above horizontal. What is the velocity of the ball just before striking the ground???

59. ## Account

Ques.: The following is the Trial Balance of a trader as at 31st December, 2001: Debit Balances Rs. Credit Balances Rs. Stock (1-1-2001) Sales returns Purchases Freight and carriage Rate, Rent etc. Salaries and wages Sundry debtors Bank Interest Printing

60. ## chemistry

What volume (L) of an aqueous solution that is 24.00 % by mass ammonia (NH3) and has a density of 0.910 g/mL must be taken to obtain 61.2 g of ammonia (NH3) ?

61. ## chemistry

If 740. mL of 0.06622 M aqueous NaI and 370. mL of 0.07151 M aqueous Pb(NO3)2 are reacted stoichiometrically according to the equation, what mass (g) of NaI remained? Pb(NO3)2(aq) + 2 NaI(aq) → PbI2(s) + 2 NaNO3(aq)

62. ## physics

In a historical movie, two knights on horseback start from rest 62 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.17 m/s2, while Sir Alfred's has a magnitude of 0.30 m/s2. Relative to Sir George's

63. ## physics

I still need help with this please.two knights on horseback start from rest 62 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.17 m/s2, while Sir Alfred's has a magnitude of 0.30 m/s2. Relative to

64. ## math

(i) Compute the average rate of change over the shortest interval to the left of the point of interest (for instance, for the interval from 6 to 9). (ii) Compute the average rate of change over the shortest interval to the right of the point of interest

65. ## biology

what does it mean to say that the ratio of oxygen to carbon in fat is smaller than that in carbohydrate? i know that the formula for glucose is c6h12o6. so when they say that the ratio of oxygen to carbon in fat is smaller, what exactly is it like? So the

66. ## Science

I forgot my book in my desk and have homework over the weekend!! HELP ME!

67. ## math

Three times the greastest of three consecutive even integers exceeds twice the least by 38. Find the integers.

68. ## accounting

What are the different methods used to calculated depreciation? How does a company decide which method they should utilize? How does their choice affect the financial statements?

69. ## English

1. I can give you a hand if you want. 2. I can give you a help if you want. (Are both expressions grammatical?)

70. ## math

solve the absolute value |4n+1|+10=4

How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!

72. ## English

This is my final question. I appreciate all of your help. Is this an example of alliteration, assonance, consonance, rhythm? I think that it's either alliteration or consonance. Not sure though Sticks and stones may break our bones but names will break our

73. ## geometry

The perimeter of a quadrilateral is 56. The lengths of three consecutive sides are 9, 13, and 16. What is the length of the fourth side?

74. ## Physics

A golfer rides in a golf cart at an average speed of 3.10 m/s for 23.0 s. She then gets out of the cart and starts walking at an average speed of 1.30 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and

75. ## Physics

Have you ever wondered what to do with your unused pet while on vacation? Do you feel bad about just dumping it in some airport pet kennel and showing up again four weeks later? Do you ever wonder how to keep your pet fresh longer instead of having it age

76. ## physics

A pellet gun is fired straight downward from the edge of a cliff that is 17 m above the ground. The pellet strikes the ground with a speed of 29 m/s. How far above the cliff edge would the pellet have gone had the gun been fired straight upward?

77. ## ENGLISH GCSE

i need to write 5 bullet points about act 1 scene 1 and act 1 scene 3. what websites would be good to look on that explains it simply. thankyou guys!

I want help in english grammar & to write some letter, dairynotes, comprehension or I can say the basic english sentences . Can u help me up to improve my english?

79. ## Math

The points A(1, -2, 4), B(3, 5, 7), C(4, 6, 8) are three of four vertices of parallelogram ABCD. Determine the coordinates of vertex D Could someone please tell me to go about solving this question. Thanks a lot.

80. ## earth

why was Copernicus model accepted over the geocentric model, even when it did not predict stellar event any better than the geocentric model

81. ## Statistics

a normal distribution ha am ean of 80 with a standard deviation of 20. what score separates the highest 15% of the distribution from the rest of the score?

82. ## physics

A satellite is orbit about earth, its orbital radius is 3.43*10e7m.The mass of the satellite is 9166kg and the mass of earth is 5.974*10e24kg. Determine the orbital speed of the satellite in mi/s. 1mi/s=1609m/s.

83. ## Criminal Justice

Ciminal Justice Question: A police officer takes an official report of a crime that is later shown to not have occurred. Accorrding to UCR regulations, this crime is ont considered to A) have not occured B) have been cleared by exceptional means C) be

84. ## trig

How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!

85. ## English

Identify two important influences on Langston Hughes. How did these things affect his work?

86. ## Human AnatomyandPhysiology

Which connective tissue combines with adipose tissue to form the subcutaneous layer that attaches the skin to underlying structures?

87. ## chemistry

The specific heat of compound A is 0.50 cal/g degrees c. What amount of h eat has been added to 100.0g of compound A if temperature changes by 50 degrees c.

88. ## math

Three times the greastest of three consecutive even integers exceeds twice the least by 38. Find the integers.

1x/5+4x/9=11

90. ## chemistry

How many mole of carbon are needed to react with 60 mol of sulferdioxide?

A collective noun is plural when the group acts as a unit (i.e., "The team lost their fourth game in a row.").

92. ## college physics( hey bob)

I posted this quesiotn and got some help but still don't know how to do it. could i please get a little more assistance please. I don't know how to solove for the time of falling or sound without the variable height. eng physics a rock is dropped at sea

93. ## math simultaneous equation with surds

ive got quite far but im stuck, can you go through each stage so i can check. simultaneous equation with surds 5x-3y=41 (7root2)x+(4root2)y=82 thanks for the help

94. ## chemistry

You have a stock solution of 14.0 . How many milliliters of this solution should you dilute to make 1350 of 0.280 ?

95. ## physics

What is the magnitude of the displacement of the golf ball from t=0 s to t=2.0 s? and What angle does the displacement vector make with the +x axis? angle= degrees.

96. ## physics

A car starts from rest and accelerates to a speed of 25 m/s in a time of 6 seconds. What os the acceleration of this car?

97. ## math

-2(5+2)-3(3-4)-5

98. ## chemistry

The mass ratio of Kr to F in a particular compound is 2.206:1. How many grams of fluorine are present if the compound contains 713.3 grams of Kr?

99. ## algebra

A person bought 17 gifts for his nieces and nephews. The gifts were dolls for the nieces at \$12.99 each, and robots for the nephews at \$10.99 each. The total spent was \$198.83. How many of each gift was bought?

100. ## AMERICAN HISTORY

After the Emancipation Proclamation, many African Americans A)boarded trains for the West. B)opened weapons factories. C)rushed to join the Union army. D)started getting paid by planters.

101. ## Science

Which one shows the similarity of the two concerning reproduction? A.asexual B.binary fusion C.seeds D.cell division

102. ## English

Are these correct? Is this an example of a metaphor: Ms. Wyman's sigh is like a blanket she pulls over her on a cold morning. Is this an example of an understatement: All of a sudden Addie gets all sympethic like shes ten years older than me and engaged or

103. ## ENGLISH

Which is the proper way of saying this sentence ? #1 or #2. 1)These creatures had a master named Jadhu, whom created them and gave them existence 2)These creatures had a master named Jadhu, who created them and gave them their existence. Im unsure.

104. ## physics

A golfer rides in a golf cart at an average speed of 3.10 m/s for 29.0 s. She then gets out of the cart and starts walking at an average speed of 1.40 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and

105. ## English language learned

How can data from various sources relating to the learners' progress be used as a tool to drive the standards-based instruction?

106. ## math

jorge took less than twice as may trows as shauna took twice as many as kenyadid ,and toni took two less than jorge .the mean avrage number of trows for rge 4 students is 4 and a half.

107. ## Geography

In simple terms can you please explain to me what free market capitalism means? All the definitions are confusing and I don't understand them. Thank you for your help.

108. ## keyboarding

You’re putting together a memo and have additional material to staple to it. What word should you type below the reference initials

110. ## physics

how long does it take an object ti accelerate from 25 mi/hr if it acclerates at 50 mi/hr squared

111. ## geo

If B is the midpoint of find the values of x and AB. The diagram is not to scale

112. ## Geography

Western civilization is characterized by the beliefs that the individual is in control of their environment and is responsible to improve it for themselves and family. Where do these beliefs come from?

scientist needs 5L of 12% solution. She has on 10% and 17% solution. How much of each does

114. ## college

How can you get the quadratic formula out of this if there are two unknowns? speed of sound and u. also is there suppose to be another + after the second u? u^2/speedsound+u sqrt2/g - 3.4=0

i don't kow how to sole this equation 5x-10=2x-7 can u help me

116. ## College Physics

Have you ever wondered what to do with your unused pet while on vacation? Do you feel bad about just dumping it in some airport pet kennel and showing up again four weeks later? Do you ever wonder how to keep your pet fresh longer instead of having it age

117. ## chemistry

The mass ratio of Kr to F in a particular compound is 2.206:1. How many grams of fluorine are present if the compound contains 713.3 grams of Kr?

118. ## Science

The rocks which float in space within the solar system are called?

119. ## Physics

A disconcerted dog of a mass 7.80 kg is sliding down a frictionless plank which is inclined at an angle of 48.0 degrees to the horizontal. Calculate the force which accelerates the dog down the plank.

120. ## Physics

A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

121. ## Physics

On a velocity-time graph of a person's walk, if a person is slowing down in the positive direction, then acceleration is in the negative direction.For example, the positive direction is [E]. If a person's acceleration is -1m/s^2, then it is 1 m/s^2 [West].

122. ## english

God grinds and kneads Christ into the bread of life. which poem did this come from? "contemplations" , "i kenning through astronomy" or "meditations"?

123. ## Science

This is a follow up on my other question: I need help on Mitosis, and cell reproduction.

124. ## physics

how long would it take for the car to go from 0 to 4mi/h

125. ## social studies

give an example for plains not plans like a large area of nearly flat land.

126. ## math

a developer plans to build a house around a 100ft 10,000 sq ft lake. people want to buy 100ft. how many lots can developer build

127. ## Math

5 = 1/2 (x-6) I keep getting 8 as my answer, but the book says it's 16?

128. ## physics

in physics what is sqrt?

129. ## college physics (bob again

would 2.68 meters be a reasonable height for the cliff?

130. ## public health

what is the relationship between researched evidence-based care?

131. ## math

9-2c+c=-13 The book says the answer is 22 but I got 23/3