# Questions Asked onJune 10, 2010

1. ## CHM 152

At 20oC, a 2.32 M aqueous solution of Ammonium Chloride has a density of 1.0344g/ml. WHat is the molality of Ammonium Chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol?? I am not sure how to incorporate the density into the problem to

2. ## STATISTICS

Consider a binomial random variable where the number of trials is 12 and the probability of success on each trial is 0.25. Find the mean and standard deviation of this random variable. I have a mean of 4 and a standard deviation of 2.25 is this correct

3. ## physics

Superguy is flying at treetop level near Paris when he sees the Eiffel Tower elevator start to fall (the cable snapped). His x-ray vision tells him Lois LaTour is inside. If Superguy is 1.00 km away from the tower, and the elevator falls from a height of

4. ## physics

9. A stone is thrown at an angle of 30° above the horizontal from the top edge of a cliff with an initial speed of 19.6 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 6.7 s. How far out from the cliff's edge does

5. ## chemistry

Write the formula of the conjugate base for acid H3PO4 and what is the name of the base Write the formula of the conjugate base for acid H3O+ and what is the name of the base ..........and how can i tell how to get it? i am lost

6. ## english

I need help. I need to revise any run-on sentences. The first one is this. Not sure if these are correct. Death Valley National Monument located in Southern California and Nevada, is one of the hottest place on earth. Temperatures there have soared as high

7. ## STATISTICS

According to the Central Limit Theorem, The traditional sample size that separates a large sample size from a small sample size is one that is greater than 100 30 500 20

8. ## STATISTICS

Can a frequency distribution have overlapping classes? i would say no ,but I believe i am wrong.

9. ## STATISTICS

If my p-value = .322 and my significant level is .05 , then; I cannot make a decision until my sample size is given. is the correct answer?

10. ## Algebra HELP:(

Use the discriminant to determine how many real-number solutions the equation has. 36x2 - 12x + 1 = 0 How do I do this?

11. ## physics

A ball is launched from ground level at 31.8 m/s at an angle of 35° above the horizontal. How far does it go before it is at ground level again? A) 14 m B) 21 m C) 43 m D) 86 m E) 97 m

12. ## Math

The measure of an angle formed by two secants intersecting inside the circle equals a.½ the sum of the intercepted arcs b.½ the difference of the intercepted arcs c.½ the measure of the intercepted arc I need help please!

13. ## physics

A jet airliner moving at 500 mph due east moves into a region where the wind is blowing at 120 mph in a direction north . What is the new velocity and direction of the aircraft?

14. ## Precalculus

The burial cloth of an Egyptian mummy is estimated to contain 57% of the carbon-14 it contained originally. How long ago was the mummy buried? (The half-life of carbon-14 is 5730 years.)

15. ## Math

1.Radii of congruent circles are equal. True or False 2.The measure of an angle formed by two secants intersecting outside the circle equals a. ½ the sum of the intercepted arcs b. ½ the difference of the intercepted arcs c. ½ the measure of the

16. ## bio

A typical adult body contains 55 \% water. If a person has a mass of 70.0 kg, how many pounds of water does she have in her body?

17. ## chemistry

A chemical problem may be presented to you in units of moles, mass, or volume. Which one of these can be directly used in your arithmetic no matter what the conditions are?

18. ## chem

Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 21.5 g sample of a metal that absorbs 685 J when temperature increases from 42.1^\circ C to83.2^\circ C.

19. ## STATISTICS

The area under a normal curve distribution is I have an answer of equal to one. is this correct?

20. ## physics

piston 1 has a diameter of 0.25 in; pistol 2 has a diameter of 1.5 in. In the absence of friction, determine the force necessary to support the 500 lb weight.

21. ## math

Two fraternities, Sig Ep and Ep Sig, plan to raise money jointly to benefit homeless people on Long Island. They will sell Yoda vs. Alien T-shirts in the student center, but are not sure how much to charge. Sig Ep treasurer Augustus recalls that they once

22. ## math

The distance d in Km to the gorizon can be estomated using the formula d= rootover13h, where h is the height above ground level, in meters of the observer. a)use the formula to find the distance to the horizon for an observer on the london eye, 135m above

23. ## Algebra1

Please let me know if these are correct. 1. Find: 10% of 30 3 2. Find: 10% of 100 10 3. Find: 20% of 50 10 4. Find: 20% of 100 20 5. Find: 50% of 50 25 6. Find: 150% of 300 450 7. Find: 15% of 56 8.4 8. Find: 27% of 92 24.84 9. Find: 32.8% of 106 34.768

24. ## Science

If neons atomic number is 10 how many electrons are in the outer energy level?

25. ## geography

what are the steps in finding a location?

26. ## Chemistry

What class do the following organic compounds do each belong and what is the IUPAC name -- 1.........Br ........../ ......./\ ......|..|..(supposed to be a hexagon) .......\/ ........| Br 2. CH3CHClBr - I have 1-bromo-1-chlorothane, what is the class? 3.

27. ## Intermediate Algebra

Rewrite the following as an equivalent logarithmic equation.Do not solve. Show your work. m^n=r

28. ## Maths

Express the sum using summation notation: 1 - 1/2 + 1/3 - 1/4 + 1/5 - ... (to 3n terms) If I'm doing this right so far, with k=1 (the number on bottom of the sigma), the equation after the sigma would be ((-1)^(k+1)) / k I'd be able to figure out the term

29. ## Algebra

How long will it take for the population of a certain country to double if its annual growth rate is 1.5%? Round to the nearest year. Use the exponential growth model P(t) = P0e^kt

30. ## economics

what is absolute advantage of 200 lbs corn and 50 pigs

31. ## child growth developnent

In detecting poor visual acuity in a neonate, you can safely blame the A. Neonate's light sensitivity B. fact that myscular coordination for focusing takes practice C. likekihood that the infant hasn't developed visual trscking ability D. fact that babies

32. ## Social 30

In one or two paragraphs, explain what should be more important to nations, self-interest or global interest? Answer in a paragraph, providing reasons.

33. ## math

Two fraternities, Sig Ep and Ep Sig, plan to raise money jointly to benefit homeless people on Long Island. They will sell Yoda vs. Alien T-shirts in the student center, but are not sure how much to charge. Sig Ep treasurer Augustus recalls that they once

34. ## Statistics

What does it mean when a researcher chooses the cutoff in a comparison distribution to be .01? a. It means that to reject the null hypothesis, the result must be higher than a z score of .01 b. It means that to reject the null hypothesis there must be less

35. ## Chemistry

CuSO4(aq) + 4NH3(aq) → [Cu(NH3)4]SO4(aq) I know that adding nitric acid will reverse the reaction. But what is the actual chemical equation? [Cu(NH3)4]SO4(aq) + HNO3(aq) --> ???

36. ## poetry

write a acrostic poem on "spaceship"

37. ## Algebra

4 sqrt 32 -3 sqrt 2=

38. ## physical science (light)

1. An object 5 millimeters high is located 15 millimeters in front of a plane mirror. How far from the mirror is the image located? A. 5.0 millimeters B. 7.5 millimeters C. 15 millimeters *** D. 30 millimeters 2. Which of the following values represents an

39. ## Geometry

A regular hexagon is made from equilateral triangle by cutting along the dotted lines and removing the three smaller triangles. if triangle has a perimeter of 18, what is the perimeter of hexagon?

40. ## Geometry HELP

Find the volume of a regular hexagonal prism if the measure of one side of the base is 14 and the height is 10. a.)140âˆš2 cm^3 b.)2940âˆš3 cm^3 c.)140 cm^3 I was thinkin the answer is 140âˆš2 cm^3

41. ## Math

What quadrants are x>0, x0, & y

42. ## Math

A diameter that is perpendicular to a chord bisects the chord. True or False

43. ## (act practice)

In the standard (x,y) coordinate plane, point M with coordinates (5,4) is the midpoint of AB, B has coordinates (7,3). What is the coordinate of A?

44. ## Chemistry

If I put the temperature is increasing would that be the same as going from -2.1 degrees Celsius to 100 degrees Celsius. OR would it be as the temperature is getting warmer??

45. ## Algebra

The length of a rectangle is fixed at 13cm. What widths will make the perimter greater than 92 cm?

46. ## world history

According to Procopius, two sixth century Christian monks undertook an elaborate smuggling operation to provide Byzantium with the knowledge to produce

47. ## math

(a) A street guide for Belfast has a scale of 1:15 000. A walkway through the city is 2.4 km long. Find the length of the walkway on the map. Give your answer in centimetres. (b) Ormeau Park in Belfast has an area of about 25 cm2 on the same map. Calculate

48. ## Algebra1

Please check these for me. 11. Find: 32 out of 38 in percentage 84.2% 12. Find: 41 out of 51 in percentage 80.3% 13. Find: 69 out of 70 in percentage 98.5% 14. Find: 32 out of 110 in percentage 29% 15. Find: 41 out of 40 in percentage 102.5% Thank you

49. ## Algebra1

Please check these 25. If a dress were 20% off of the marked price of $32.00, how much would it cost?$25.60 26. Write 1,000,000,000 in scientific notation 1.0 x 10^9 27. (3.0 x 10^2) x (2.0 x 10^6) = ? 6.0 x 10^-4

50. ## To all students posting math questions

Please know that at least 3 of our frequently posting math tutors are away from their homes on trips. There are other very good tutors who are online, but less frequently. You'll need to be very patient.

51. ## Algebra1

45. Find your percent correct on a test if you received 61 points out of 69 possible. 88.4% 49. Find your percent on a test if you received 42 points out of 80 possible. 52.5% 50. Scientific notation is most effective when used with _____ a. very small

52. ## algebra

-d = 3 sqrt d - 2 a) {3} b) none c) {6} d) {3,6}

53. ## Finance

If I open an account of a 1000.00 and it pays year interest at .08 How much will i have in a year?

54. ## Counsmer Math

Carlos Martin received a statement from his bank showing a balance of $56.75 as of March 15. His checkbook shows a balance of$87.37 as of March 20. The bank returned all the cancelled checks but two. One check was for $5.00 and the other was for$13.25.

55. ## Math

What is the minimum, lower quartile, upper quartile, maximum of these numbers? 45 52 52 68 71 71 75 77 82 84 89 90 90 94 96

56. ## college physics

find the frictional force exerted on a 20kg block pulled slowly over a horizontal floor using a rope which makes a 30 degree angle over the horizontal. the pulling force is 100N??? i found the Fn to be 146 N what do i do from there?

57. ## trig

the scores on a 100 pt test are normally distributed with a mean of 80 and a standard deviation of 6. a student's score places him between the 69th and 70th percentile. what is his score?

58. ## English

When an animated cartoon was made of Animal Farm, it was given a happy ending. Animals everywhere hear that Napoleon has betrayed the cause of animalism. They join in a second revolution and succeed in overthrowing him. This leads to the establishment of

59. ## math

what is the inverse of g(x)= 2/3x+4?

60. ## Algebra1

Please check these 15. Simplify the product using FOIL: (4x+3)(2x+5) 6x^2 + 26x + 15 16. Given the set of data 2, 6, 3, 8, 5, 4, 2, what is the mean? 4.28 41. Find 60.5% of 8,125. 4,915.625 54. Find 45% of 125 56.25 68. Evaluate: (5.0 x 10^3) x (4.0 x

61. ## math

what is the measure, in radians, of a central angle formed by cutting a circular pizza into 12 equal wedge shaped pieces?

62. ## Chemistry

How many liters of O2 can be produced by letting 12.00 moles of KClO3 react?

63. ## Physics

An airplane is flying North with a velocity of 22 m/s. A strong wind is blowing East at 50 m/s. What is the airplane's resultant velocity (magnitude and direction)?

64. ## chem

The label on a one-pint bottle of water lists the following components. If the density is the same as pure water and you drink 2 bottles of water in one day, how many milligrams of each component will you obtain? calcium 28 ppm, fluoride 9ppm, magnesium 14

65. ## geometry

If an arc makes a central angle of 98 degrees is it a major or minor arc? Explain??

66. ## algebra

can u help me with a question

67. ## English

I need hep writing an essay about the defects of two adults in Romeo and Juliet that caused their children's disobedience. What possible characters can I do, and what main ideas should I write for each character?

68. ## Geometry

If [angle]D is a right angle and lines PN, FG, and BD are parallel to each other, prove [angle]SPN ~ [angle]SFG ~ [angle]SBD

69. ## Math

Could someone help me with this equation? Use the quadratic formula to solve the equation... 2x^2 - x = -10

70. ## science

what causes some genetic disorders like sickle cell anemia

71. ## English

1. The next few years, you are growing in and out. 2. Over the next few years, you are growing in and out. 3. In the next few years, you are growing in and out. 4. During the next few years, you are growing in and out. (Which one is correct? Which one is a

72. ## English

1. You can grow several centimeters in a short time. 2. You can grow by several centimeters in a short time. (Are both OK? Is 'grow' a transitive verb or an intransitive verb? Is 'by' missing after 'grow' in #1?)

73. ## English

1. Sometimes, you want to be alone. (Is 'alone' an adjective or an adverb'?)

74. ## Chemistry

What is the formula for the expect products of these reactions. 1.....CH3 ........\ .........CH-CH2-CH2-Br+NaOH-> ......../ ........CH3 ...............catalyst 2. CH4+4Cl2------------->

75. ## us history

If the 13th, 14th, and 15th Amendments, which were passed almost 100 years earlier, guaranteed that African-Americans had the right to vote, why was legislation such as The Voting Rights Act of 1965 necessary?

76. ## chemistry

What is the name of this compound CH3CHCH2CH3 ...| ...OH (this should fall directly under "CH")

77. ## Chemistry

What is the IUPAC name and classify as primary, secondary or tertiary ..............__ 1. CH3CH2-O-/..\ .............\__/ 2. CH3 .......\ .......CH-CH2-CH2-OH ......./ ....CH3 3. CH3CH2CH2CH2CH2OH, i show this to be 1-Pentanol which is primary.

78. ## chem

Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 18.5-\rm g sample of tin that absorbs 183 {\rm J} when temperature increases from 35.0 ^\circ \rm C to 78.6 ^\circ \rm C.

83. ## Intermediate Algebra

Given logb3 = 0.792 and logb5 = 1.161. If possible, use the properties of logarithms to calculate values for the following show your work logb 1/3

84. ## Cody

With whom do the doctors identify charlie? by "whom" is referring to another person? I don't get this question. Please clarify. thanks.

85. ## science

I was wondering if you could help me with my homework so how does sunlight get into a leaf that's part of a plant please help me![good bye]

in her room at the prow of the house where light breaks and the windows are tossed with linden. my daughter is writing a story i pause in the stairwell , hearing from her shut door a commotion of typewriter- keys like a chain hauled over a gunwale. young

87. ## Chemistry 30

According to the data booklet Cu(NO3)2 and Sn(s) are spontaneous Cu2+ being a strong reducing agent and Sn(s) being a strong oxidizing agent but according this lab:

88. ## pre-calculus

If (1)(2) + (2)(3) + ... n(n+1) = n(n+1)(n+2)/3 complete the inductive step of its proof: 1(2) + 2(3) + ... k(k+1) + (k+1)(k+2) I have no idea what to do.

89. ## chem

how can i figure out how to calculate molecules to grams ?

91. ## child growth development

Researchers have concluded that A. the proportion of REM sleep to N-REM sleep is similar in infants and adults B. REM sleep provides needed brain stimulation to neonates C. REM sleep is mostly absent in neonates D. the proportion of REM sleep to N-REM

92. ## math

Two fraternities, Sig Ep and Ep Sig, plan to raise money jointly to benefit homeless people on Long Island. They will sell Yoda vs. Alien T-shirts in the student center, but are not sure how much to charge. Sig Ep treasurer Augustus recalls that they once

93. ## physics

The highest mountain on Mars is Olympus Mons, rising 38569 meters above the Martian surface. If we were to throw an object horizontally off the mountain top, how long would it take to reach the surface? (Ignore atmospheric drag forces and use gMars = 3.72

94. ## Social 30

define isolationism and explain if it is possible for a powerful nation to isolate itself from the world. Cite specific details from this period of history and provide reasons for your answer.

95. ## English-Plot Summary

Could someone please provide me with sites from which I can get ideas on how to write a plot summary. Thanks a lot:-)

96. ## AED 204

Here is the scenario plus the questions. Jenny Reid is a middle-school teacher in a suburb of Atlanta. Her sixth-grade students are primarily majority group students from middle-class backgrounds. The children in her class are good students, well

97. ## A movie question

Has anyone seen the movie Gatacca? What has the title of that movie have to do with the genetics and stuff? What is the significance of that title?

98. ## physics

A ball is rolled horizontally off a table with an initial speed of 4.0 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.34 s. What is the height of the table? (g = 9.8 m/s2 and air resistance is negligible)

99. ## chemistry

Calculate the hydroxide ion conc. and the % ionization @20oC in a 1.25 M NH3 solution. The Kb for NH3 = 1.70x10-5 @20oC.

100. ## elementary

You're an elementary teacher in a self-contained classroom. You've got a class of 29 lively sixth graders, and you've been struggling all year with classroom management. Damien, a larger than average boy, seems to resist your efforts at every turn. You

101. ## science

What are the three categories of fungi?

102. ## English

For my english ISU presentation, we are expected to present the thesis of our novel and relate our thesis to other mediums in our society today like poems, songs, movies, other novels. Anything like that. The novel i am doing is my sister's keeper by jodi

103. ## physics

An 9.0 m, 210 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50.0° angle with the ground. How far up the ladder can an 890 N person climb before the ladder

104. ## Plz Check my Geometry(sOo0n)

Out of 31 questions these are ones I struggled with. after the = sign is what I think the answer( except for #4, I don't know what to do at all), is so if I'm wrong can someone correct it with an explanation/formula with it please? 1.) Find the area of the

105. ## Chem Check

The first law of thermodynamics is the application of the conservation of energy principle to heat and thermodynamic processes.

106. ## Algebra

for the follwong equation, state the value of the discriminant and then describe the nature of the solutions: 5^2+9x+2=0

126. ## Ancient Civilizations

Hey, did the Ancient Greeks invent/came up with different methods of sculpting that affects the techniques of sculpting today? And also with tools? Thanks

127. ## Geometry HELP

Find the area of the parallelogram. (base(s)=10cm, slant/side length(s)=6cm, h=? and the angle measure is 60degrees. a.)15âˆš3 cm^2 b.)30âˆš3 cm^2 c.)15âˆš2 cm^2 I think it's 30âˆš3 cm^2.

128. ## math

how to make a tally chart for the number of students in the third, fourth and fifth grade classes 26,25,27,27,26,28,27

129. ## algebra

Solve: 8 = sqrt () y + 2 a){62} b){6} c) none d){66} And I tried to the sqrt root image i can see but you can't and thanks

130. ## Geometry HELP

What is the equation for a circle with a diameter having the following endpoints: N(0,1) and Q(18,1)? a.)(x - 9)^2 + (y - 1)^2 = 81 b.)(x + 2)^2 + (y - 7)^2 = 56 c.)(x)^2 + (y)^2 = 72

131. ## Algebra

I understand that systems of equations can be solved by graphing or by using substitution or elimination. But I cannot think of any pros or cons so... What are pros and cons of each method?

132. ## Chemistry

Record the amount of heat needed to change phases for water-ice to steam using graphical analysis. Is there a one accurate amount of heat needed to change phases, I thought it varied depending the problem... Would the question be asking for the heat needed

133. ## Geometry HELP

An isosceles triangle Î”ABC has its altitude at the y-axis and its base at the x-axis. D is the midpoint of segment AC and E is the midpoint of segment CB. Given the coordinates A(-2a, 0), B(2a, 0), and C(0, 2b), determine the coordinates of midpoints D

135. ## world history

what is the ka'bah?

136. ## Geometry HELP

Using coordinate geometry to prove that the diagonals of a square are perpendicular to each other. Given: Vertices are at A(0,0), B(a,0), C(a,a) and D(0,a) Slope of AC=1; Slope of BD=-1 Type your proof. (someone plz help cuz i don't understand)

137. ## Math

In a right triangle I need to find the length of the missing side. If.. a = ? b = 1 c = sqrt(5) I would know what to do if the square root wasn't there or if it were a perfect square but it's not, please help... (P.S. if I need to I have to keep it in

138. ## math

Triangle ABD in the diagram has a right angle A and sides AD = 4.9cm and AB = 7.0cm. side AB is extended to C so that ABC is a straight line. a) use pythagoras theorem in triangle ABD to find the length of BD. b)use trigonometry in triangle ABD to find

139. ## INB

3. Assignment: Lunch and Learn Presentation • Consider the following scenario: You have been asked by the director of your department to put together a Lunch and Learn Presentation wherein you present to your coworkers an introduction to the concepts of

140. ## mgt

Determine what you think would be the best three approaches for managing resistance to change, of the six approaches listed in the Skill Concepts and Behaviors section, to apply to the nursing teams situation. The six approaches for managing resistance to

141. ## Algebra 2

How do I simplify tan θ + cot θ ? Or is it already simplified?

142. ## physics

Monochromatic light with a wavelength of 5.0 E -7 meter passes through two narrow slits, producing an interference pattern on a screen 3.0 meters away. The first order bright band lines 2.0 E -2 meters away from the central bright maxima. What is the

143. ## math

Two cones have congruent radii and the altitude of one cone is twice that of the other. What is the ratio of their volumes? ( Options=1:4, 1:2 or 1:8) would it be 1:4

144. ## chemistry

n the reaction 2CO(g) + O2(g) ® 2CO2(g) what is the correct expression of the rate?

145. ## Plz Check my Geometry(sOo0n)

Out of 31 questions these are ones I struggled with. after the = sign is what I think the answer( except for #4, I don't know what to do at all), is so if I'm wrong can someone correct it with an explanation/formula with it please? 1.) Find the area of the

146. ## physics

A runner hopes to complete a 10,000 m race in a time of 30 minutes. After running at a constant speed for exactly 27 minutes, there are still 1100 m to go. The runner then accelerates at 0.2 m/s2 for how many seconds in order to achieve the desired time?

147. ## Chemistry

Could someone tell me what thermal changes are in a heat curve of water or in general what it is? Thank you...

148. ## Physical Science

Please use the Bohr model simulator at Michigan State University to complete the table below: initial orbital ending orbital Wavelength (nm) 3 2 4 2 2 434 2 410.2 7 2 397 4 3 5 3 Bohr Model Simulation McGraw-Hill (Java)

149. ## english

where is the simple subject and compound subject in this sentence?They are projecting a sales increase of 14 percent.

150. ## Plz Check my Geometry (Urgent)

***I know I've posted this several times but it's like getting skipped and or no one has gone over it so I'm posting it one more time before I go to bed. I need to have these checked by tommorrow PLEASE!*** Out of 31 questions these are ones I struggled

151. ## college sci/241

Think of some of your favorite foods when you were 10 years old. Are they still your favorites? Do you think you will be eating the same foods you eat today 20 years form now? What are some of the reasons dietary modifications may be needed in different

152. ## math

A store marks up items 42.5% to allow for profit. If an item costs a store \$24.40, what will its selling price be?

153. ## algorithms and logic

i need an example of a peer review of the currency conversion test procedure exercises

154. ## Algebra 2

Can (1 + cosθ)/sinθ be simplified further?