# Questions Asked onFebruary 5, 2008

1. ## Chem

If a class of 30 chemistry students have 17 of the students who are female. What percentage of students is female?

2. ## us history

discuss specific problems or injustices that were present in american life during the late 1800s and early 1900s? Explain how reforms proposed during the Progressive Era attempted to address these problems.

3. ## Physics

A 40.0kg child is in a swing that is attached to ropes 2.00m long. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions: a) When the ropes are horizontal b) When the ropes

4. ## physics

what is the final temperature when a 3.0 kg gold bar at 99 degrees is dropped into a .22 kg of water at 25 degrees

5. ## chem

How many moles of ethylene glycol must be dissolved in 500 g of water (Kf = 1.86) to lower the freezing point to -5.00 0C?

6. ## statistics

A score that is 10 points below the mean corresponds to a z-score of z=-2.00. What is the population standard deviation?

7. ## Economics

The peak of the business cycle occurs when?

8. ## math

Suppose you are going to roll a die 60 times and record the proportion of times that a 1 or 2 is showing, s. The sampling distribution of s should be centered about....?

9. ## Science

What items can be measured in kiloliters, hectoliters, decaliters, liters, deciliters, centiliters, and millimeters??

10. ## physical science

A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centripetal force on the car is 6,000 newtons. What is the radius of the curve? A. 80 meters B. 32 meters C. 16 meters D. 160 meters

11. ## algebra

determine which two represent perpendicular lines; y=6x-3,y=1/6x+3, y=-1/6+3, or y=1/6x-3.

12. ## gbgfddfdf

which is biger 13/17 or 12/15

13. ## physics

A dip needle is a small magnet mounted on ahorizontal axis so that it can swivel up or down like a compass turned on it's side) where on earth will a dip needle point most nearly vertically? where will it point most nearly horizontally?

14. ## chemistry

3.) One method used in the eighteen century to generate hydrogen was to pass steam through red-hot steel tubes. The following reaction takes place: 3Fe(s)+4H20(g)--->Fe3O4(s)+4H2(g) 1. What volume of hydrogen at STP can be produced by the reaction of 6.28

15. ## Chemistry

Given this equation: 2P2O5 + 6H2O ---> 4H3PO4. If you begin with 4.8 grams of p2o5 and 15.2 grams h20, what will be your limiting reactant. I got the answer to that and it is P2O5. (6.6 grams) and H2O was 55.2 grams. so the limiting reactant P2O5. Then the

16. ## Chem Need Help

I really need help with this question? You have a 12.01 g sample of carbon. The average mass of a carbon atoms is 1.994 x 1023 g. How many carbon atoms are in the sample? (round the number to 2 decimal places) (if you get a superscript, place a ^ before

17. ## algebra 1

express the area of each triangle as a monomial. 10. height-2n^2 base- 5n^3 11. height- 4ab^5 base- 3a^4b

18. ## us history

I need help on writing an dbq for us history

19. ## science

The electric field intensity between two charged plates is 1.1*10^3 N/C. The plates are 0.070 m apart. What is the electric potential difference, in volts, between the plates?

20. ## physics

a.What electric potential difference exists across a 5.2 µF capacitor that has a charge of 2.1 10-3 C? how do i use uF and C into a formula to find answer?? b.An oil drop is negatively charged and weighs 8.5 10-15 N. The drop is suspended in an electric

21. ## Science

When you boil an egg, the egg "white" changes from clear to white. The egg also becomes "hard boiled." What type of changes are occurring in the egg? A.Chemical B.Neither physical nor chemical C.Physical D.Physical and Chemical

22. ## statistics

Which of the following numbers could not possibly be probabilities? justify your answer a)0.124 b)1 c)-0.1142 d)0 e)2/7 f)6/5 g)2.8

23. ## chemistry

Use the activity series of metals to write a balanced chemical equation for each single-replacement reaction. Zn(s) + AgNO3 (aq) --> NOTE: The three above is a subscript...it should be a small 3. Please explain how to figure out this problem, and provide a

24. ## Biology

Hi, I am studying energy movements in ecosystems. Could you help me with this question: What type of food would be consumed by a secondaryconsumer in the third trophic level of a food chain.

25. ## Chemistry

How would you approach a question like There are 6.02x 10 to the power of 23 atoms in one mol of atoms, how many atoms are there in 5.5 mol of atoms?

26. ## physics

the north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles reple. can you resolve this apparent dilemma?

27. ## algebra

One-fifth of a flank is sawn off and three-eights of remaining piece is then thrown away.What fraction of original remains?

28. ## Graphic Design

What results from a total lack of managed white space? Under what circumstance can it be desirable?

29. ## chem

delta T = Kf*molality Plug in 5.00 C for delta T, 1.86 for Kf and calculate molality. Then molality x kg solvent x molar mass = grams. You know molality, kg solvent, and molar mass. Calculate grams. molar mass? where did u got the molar mass from ?

30. ## Graphic DesignList

List five or more white spaces functions in Graphic Design?

31. ## bio

What does a skeltal muscle fiber look like? I looked in google, but it shows images of skeltal muscle.

32. ## Graphic Design

Why is symmetry associated with passive design? Why is asymmetry associated with active design?

33. ## math-algebra

How do i solve these problems: 1. 2(-5y^3)^2+(-3y^3)^3 2. Lemon juice is 10^2 times as acidic as tomato juice. Tomato juice is 10^3 times as acidic as egg whites. How many times as acidic is lemon juice as egg whites? Write as a monomial. 3. The seismic

34. ## economics

differences between capital economy and communist economies

35. ## math

The weights of extra large eggs have a normal distribution with a mean of one ounce and a standard deviation of 0.1 ounces. The probability that a dozen eggs weighs more than 13 ounces is closest to...?

36. ## Language Arts

I need to write an essay about Elvis Presley. When I look online, these biographies are too long. Help!

37. ## social studies

What type of a social scientist would research "where does the most crime happen in the world"?

38. ## art

What are the "degrees removed from reality?"

39. ## Math

Evaluate the following: 5lb/ft x 3ft

40. ## math

simple form 3 ¾ / 60,000= 41 ½ / 3 ¾ A computer can excute 36 instructions per microscecond. How many instructions can it execute in 4 min?

41. ## Biology

Why would an Arctic ecosystem be more fragile than a southern forest ecosystem?

I am trying to define the different appraoches to solving quadratic equations. My book says using quadratic formula, completing the sqaure and factoring. I thought completing the square would be by facotring? How are these two different?

43. ## algebra

solve system by graphing 3x+y=6 and 3x-y=0.

44. ## algebra II

how do I work a exponential and logarithmic function on a TI83?

45. ## Algebra

The denominator of a fraction is 2 less than twice the numberator. If the numerator is decreased by 2 and the denominator is increased by 3, the resulting fraction simplifies to 1/3. Find the original fraction. Have no idea what to do.

46. ## literacy/plurals

how do we normally make the plural form of a singular nounthat endi in f or fe~?

47. ## Pre-Cal

What are bearings??

48. ## Physical Science

Hello, I wanted toknow if I came to the correct solution for this problem. Thank You, 20 Cubic inches of a gas with an absolute pressure of 5 psi is compressed until its pressure reaches 10 psi. What is the new volume of the gas?(assume that there's no

50. ## algebra

solve for x 3x+4y=24

51. ## social studies

how do i look up presidents

Bizzy, I have taken this paragraph and rewritten it to let you see what I meant by being less wordy and better organized. My study of Human Development will be useful in working with children. The course,Human Development 307I Childhood through

53. ## biology

How could you determine the genotype of an individual through breeding?

How does bankruptcy affect interest rates on loans? Credit cards?

55. ## spanish

Can someone please check this for me? How long has it been since the following people have done the following things? Write the answers using the expression hacer + time. 1) Santi y Silvina: no estar casados / un año Your response: Hace un año que Santi

56. ## biology

(1)Mendel crossed pure-breeding pea plants grown from round seeds with purple flowers with pure-breeding plants grown from wrinkled seeds with white flowers. All the progeny were round seed, purple flowers. Explain this with a suitable genetic diagram. I

57. ## history

what is The trans-Atlantic slave trade and its most lasting consequence.

58. ## economics/sports

What is the difference between a large market team and a small market team? What makes a team a large market team or a small market team?

59. ## Chem II

Ccalculate the molarity of the resulting solution when 125.0 ml of water is added to 350.0 ml of a 3.75 M solution of HCl

60. ## Biology...PLZ HELP

(1)Mendel crossed pure-breeding pea plants grown from round seeds with purple flowers with pure-breeding plants grown from wrinkled seeds with white flowers. All the progeny were round seed, purple flowers. Explain this with a suitable genetic diagram. I

61. ## ushistory

who were the bosses of the senate?

62. ## us history

we..propose.."effective legislation to prevent industrail accidents ,occupational diseases,overwork,and unemployment...to fix minimum standards of health and safety in industry...and to provide a living wage throughout industry....." state 2 reforms that

63. ## Spanish very confused.

do the following with correct forms of ser or estar Manuel Roberto! No ____1__ listo? Debemos __2____ en la fiests a las ocho. Roberto Es que todavia ___3____ buscando mi ropa. Manuel Ay, Roberto!Tu ____4____ un desastre! Roberto Por que no me ayundas a

64. ## science

What are 3 types of chemical reactions

65. ## Economics

What is the percent of increase when CPI is 121 then the initial value of CPI was 110?

66. ## spanish

Can you check my essay and correct it please ? this is my first essay ever in spanish, my classmates has done it for 2 years but as i moved from denmark to england, i had to do spansish, so help me please. No llevé uniforme escolar en Dinamarca cuál me

67. ## Physics

What is the resultant of two displacement vectors having the same direction? a. The resultant is the sum of the two displacements having the same direction as the original vectors. b. The resultant is the difference of the two displacements having the same

68. ## Ancient Civilizations

Who were the Xiongnu and were did they live?

ROUND 77.1

70. ## english

I need help writing a DBQ

72. ## us history

i don't get what the task means when it says discuss problems or injustices that were present in american life...what does injustice mean ...can some one explain it

73. ## us history/english

when told to include 5 documents how can i include do ..do i say according to document 1 .what can i say?

74. ## calculus-differential equation

Consider the differential equation: (du/dt)=-u^2(t^3-t) a) Find the general solution to the above differential equation. (Write the answer in a form such that its numerator is 1 and its integration constant is C). u=? b) Find the particular solution of the

75. ## Science

What are some things children must learn but animals don't need to know?

76. ## Math - Geometric Vectors

The fractions (2/3), (4/6), (6/9), ... are all equivalent to the fraction (2/3). Explain how the concept of equivalent fractions is analogous to the concept of equivalent vectors. I completely lost, I don't know the answer or how to answer the question.

77. ## arithmetic

Write 0.125 as a fraction in simplest form

78. ## Science calculations

An airplane must achieve a velocity of 71 m/s to takeoff. If the runway is 1000 m long, at what speed must the plane constantly accelerate? Can you show the formula for how you found the answer and explain how to do it.

79. ## Chem II

Find the a) % solution, b) molality and c) mole fraction of the acid 16.0 M H2SO4 d = 1.634 g/ml for the solution

80. ## calculus

f(x)= {kx-3 if x is less than or = to 1 {x^2+k if x is greater than 1 find k such that lim f(x) (x to 1) exists

81. ## algebra

(-7x+3)+(4x^2+1/2x-10) Simplify answer - -14x^2+8x^2-13 over denominator of 2?

82. ## For Bizzy - from GuruBlue

http://www.jiskha.com/display.cgi?id=1202238583 Just in case you missed this below ...

83. ## statistics

In the U.S. 42% of the population has type A blood. Consider taking a sample size 4. Let y denote the number of persons in the sample with type A blood. a)Pr(y=O) b)Pr(y=1) C)Pr(y=2)

84. ## STATISTICS

The seeds of the garden pea are either yellow or green. A certain cross between pea plants produces progeny in the ratio 3 yellow:1 green. If four randomly chosen progeny of such a cross are examined, what is the probability that: a)3 are yellow and 1 is

85. ## dividing - monomials

(3)-2 --- (7) HOW DO YOU DO THIS TYPE OF PROBLEM?

86. ## pre-cal

can anyone please explain to me how to simplify this exponential expression??I got no idea...THANKS A LOT! [(-8x^6)/(y^-6)]^2/3

87. ## science

What can be measured in hectometers?? BTW about how old is everyone here? I cant answer most of the questions because their too hard.

88. ## french

i need 10 french slang terms. but they need to be 10 slang terms that teens use . =]

89. ## Math

It was 47F today. How many degrees above freezing is this? Number Sentence____________________ Answer____________

90. ## sra McGuin

Hi I hope you are feeling better I have 4 sentences. answer the questions positively using complete sentences. Present - preterite - I am so confused on this thank you - Te cepillaste los dientes despues de comer? - Se maquilla Julia antes de salir a

91. ## AP Chemistry

Could you please review my work and see what i'm doing incorrectly? Thank you Given this information: CxHyOz (s) + O2 (g) ----> CO2 + H20 given: 2.165 g of the unknown hydrocarbon v = 1.868 L P = 130.2 kPa T = 65.0 degrees C g of H2O = 1.818 a)find g H in

92. ## History

What article in the constitution does it state Who has the power to settle disputes involving the United States?

93. ## Chem II

What mass of PbI2 can be formed from 75.0 mL of 0.65 M NaI by adding excess Pb(NO3)2? Pb(NO3)2 + 2NaI ---> PbI + 2NaNO3

94. ## matter

i need information on my atom project, my atomic number is 73

95. ## Math

How was it determined that a circle is 360 degrees and all angles of a triangle equal 180 degrees?

96. ## English

I am a co-op student in a Grade 1 class have been preparing lessons have to develop a language lesson on Valentine's Day vocabulary and follow up with an activity I am being tested on this I just need a good idea once I have the idea the rest will follow

97. ## Chemistry

Please explain the acitivty series of metals. How can i determine if one element displaces another?

98. ## algebra

(-7x+3)+(4x^2+1/2x-10)

99. ## chemistry

A saturated solution of ammonium sulfate, (NH4)2SO4, in water at 30 0C contains 78.0 g (NH4)2SO4 per 100.0 g H2O. What is the molality of this solution?

100. ## Accounting

Is a straigh-line amortization basis for trademarks required under U.S GAAP ? or is another method required ?

101. ## Japanese

What is the Japanese translation of this sentance: "I think that that woman is Mary's Japanese teacher"

102. ## chemistry

Using calories, how much heat will 32 grams of water absorb when it is heated from 25 C to 80 C?

103. ## statistics

In a population of exam scores, a score of x=88 corresponds to z=+2.00 and a score of x=79 corresponds to z=-1.00. Find the mean and standard deviation for the population.

104. ## algebra

How do I simplify (-2b^3)^4-3(-2b^4)3 ?

105. ## physics

manet A has twice the magnetic field strength of magnet B (at equal distance ) and , at a certain distance,it pulls on magnet B with force of 50n. with how much force, then dose magnet B PULL ON MAGNET a?

Iodine-131 is used to treat hypo-thyroidism since it is preferentially absorbed by the thyroid and typically involves a total radiation dosage of 10,000,000 millirem. Iodine-131 has a half-life of eight days. 1. Set up the appropriate integral to represent

107. ## Social Studies

Did Bismarck form any tax LAWS that were not approved by the Reichstag?

108. ## Japanese

What is the Japanese translation of this sentance: "I think that that woman is Mary's Japanese teacher" Could the answer pleased me typed in English. My computer does not recognize Japanese font.

109. ## math

do i mypitly the radias by 2 to get the diameter

110. ## Maths

How many different numbers can be made using 4 numbers a b c and d and only + and - ?

111. ## Maths

I can't do the following problem. I am not sure what to do when you have an algerbraic power & have to multiple it by a real number? ((x^ny^(m+3))^2)/x^(n+2)y^3-m)) * ((x^2y)/(x^(n-5)*y^(5-3m))

112. ## e-Commerce

I'm finding it hard to find evidence that the growth of the internet has had a positive effect on businesses and organisations. Any advice would be greatly appreciated.

113. ## Geography

I'm doing a Map of the Month, and i'm almost done. I just have to locate and lable 3 rivers. (Helmand River, Amu Darya River and Indus River). I'm having some difficulty trying to find a clear map that labes the at least one of the lakes, so if anyone had

114. ## Accounts

A manufacturing Company produces 2 products – A and B. The following information is presented for both products: A B Selling Price per unit \$18 \$12 Variable Cost per unit \$14 \$6 Total Fixed Costs are \$468,000. Compute: The contribution margin for each

115. ## math

what is it mean to "foil" in math

116. ## Math

Sketch the Graph of x^2=y^2=9

117. ## English

What is a textual change?

118. ## math

In a large population of adults, the mean IQ is 112 with a standard deviation of 20. Suppose 200 adults are randomly selected for a market research campaign. The probability that the sample mean IQ is greater than 110 is...?

119. ## biology

Compare and contrast the processes of photosynthesis; aerobic respiration; and the two types of fermentation. Give examples of organisms that make use of each of these processes.