# Questions Asked onFebruary 10, 2008

1. ## physics

Suppose the amount of heat removed when 3.0kg of water freezes at 0 degree C were removed from ethyl alcohol and its freezing/melting point of -114 degree C. How many kilograms of ethyl alcohol would freeze? PLEASE GIVE ME SOME HINTS!!!THANKS A LOT!!!!

2. ## Physics

8. When a person stands on a rotating merry go round, the frictional force exerted on the person by the merry go round is (A) greater in magnitude than the frictional force exerted on the person by the merry go round (B) opposite in direction to the

3. ## Discrete Math - Vectors

Can you please help me correct my answers for the following two questions? 1) A tour boat travels 25 km due east and then 15 km S50°E. Represent these displacements in a vector diagram, then calculate the resultant displacement. ====== My Work: I drew the

4. ## physics.

A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/Lo does the length of the beam increase when the temperature changes from that on a cold winter day (-15 degree F) to that on a summer day (+ 105 degree F)? I got

5. ## Speech

I can't think of a good topic for an informative speech. I've tried a few different ideas but they were too boring. I want something entertaining so I will be more comfortable about speaking and have fun with it. It needs to be something I can research and

6. ## Chemistry

Electron Transfer Theory Write an label the oxidation and reduction half-reaction equations. a) Ni(s) + Cu(NO3)2(aq) -> Cu(s)+ Ni(No3)2(aq) oxidation - Ni(s) -> Ni2+(aq) + 2e- reduction - Cu2+(aq) + 2e- -> Cu(s) b) Pb(s) + Cu(NO3)2(aq) -> Cu(s) +

7. ## ap phyiscs

A bowler throws a bowling ball of radius R=11 cm down a lane. The ball slides on the lane, with initial speed v(of the center of mass)=7 m/s and initial angular speed =0. The coefficient of kinetic friction between the ball and the lane is .25. The

8. ## Science

Suppose you set a glass of water in direct sunlight for 2 h and measure its temperature every 10 min. What type of graph would you use to display your data? What would the dependent variable be? What would the independent variable be?

9. ## physics

A car is traveling 26 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.0 m/s2. How far does the car go before it stops?

10. ## physics

An electric power line carries a current of 1600 A in a location where the earth's magnetic field is 4.0*10-5 T. The line makes an angle of 75° with respect to the field. Determine the magnitude of the magnetic force on a 130 m length of line.

11. ## statistics

every year thousands of students take the SAT'S. Recent trends show that the scores on the verbal section follow an approx. normal distribution with mean of 350 and stand. deviation of 110 A)a student is chosen at random. it is noted that only 8% of

12. ## geometry

Given trapezoid WXYZ, find the ratio of the areas of each pair of triangles: WYX and XYZ WXZ and WXY

13. ## Chem

2ClO2 + 2OH- --> ClO2- + H2O Experiment 1, M of [ClO2] = .060 M of [OH-] = .030 Rate of disappearance of ClO2 (M/s) = .0248 Experiment 2, M of [ClO2] = .020 M of [OH-] = .030 Rate of disappearance of ClO2 (M/s) = .00276 Experiment 3, M of [ClO2] = .020 M

14. ## physical science

You are at the front of a floating canoe near a dock, you jump expecting to land on the dock, instead you land in the water. Explain this in terms of momentum conservation.

The Evolution of Inequality James K. Galbraith, a Government/ Business professor at the University of Texas in Austin, has gathered data and other sources to analyze the evolution of inequality in the world at large. Galbraith in junction with a group of

16. ## Chemistry

Electron Transfer Theory Write an label the oxidation and reduction half-reaction equations. a) Ni(s) + Cu(NO3)2(aq) -> Cu(s)+ Ni(No3)2(aq) oxidation - Ni(s) -> Ni2+(aq) + 2e- reduction - Cu2+(aq) + 2e- -> Cu(s) b) Pb(s) + Cu(NO3)2(aq) -> Cu(s) +

17. ## english

which is correct? a couple billions of dollar or a couple billion of dollars

18. ## Harding

Why was harding's administration so scandal ridden? Consider both Harding's personal qualities and the postwar climate. What was the long-term impact on his reputation, the republican party, and American national interests.

19. ## physical Science

Two people who weigh the same climb a flight of stairs. The first person climbs the stairs in 30 s, while the second person climbs them in 40s. Which person does more work? Which uses more power?

20. ## statistics

Every year thousands of students take the SAT'S. RECENT TRENDS SHOW THAT THE SCORES ON THE VERBAL SECTION FOLLOW AN APPROX. NORMAL DISTRIBUTION WITH MEAN 550 AND STANDARD DEVIATION OF 110 68.26% OF THE STUDENTS WHO TAKE THE SAT VERBAL SCORE BETWEEN ______

21. ## chemistry

9.) 250.0g of copper at 100.0 degrees C are placed in a cup containing 325.0g of water at 20.0 degrees C. Assume no less to the surroundings. What is the final temperature of the copper and water? So far I have used q=mc times delta t but I cannot find C

22. ## physics

An airplane flies 200 km due west from city A to city B and then 260 km in the direction of 32.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? ?km (b) Relative to city A, in what direction is city C?

23. ## Chemistry

How do u find the Hvap if you only know the slope is -.002 ?

24. ## physics

There is a 0.225 T magnetic field directed along the +x axis and a field of unknown magnitude along the +y axis. A particle carrying a charge of 7.20 10-5 C experiences a maximum force of 0.455 N when traveling at a speed of 2 104 m/s through the region

25. ## communication styles

The importance of communication in the field of criminal justice. Benefits of using a particular communication styles. And the importance of the communication process in law enforcement. could you critique this for me. The importance of communication in

26. ## Algebra

Solve for x: 5abx = 30ac^2

27. ## Math: Vectors

What conditions must be satisfied by the vectors "u" and "v" for the following to be true? a) |u + v| = |u - v| vector "u" is perpendicular to vector "v" b) |u + v| > |u - v| 0° ≤ θ ≤ 90° c) |u + v| < |u - v| 90° < θ ≤ 180° ------- Can you

28. ## calculus

1. integral -oo, oo [(2x)/(x^2+1)^2] dx 2. integral 0, pi/2 cot(theta) d(theta) (a) state why the integral is improper or involves improper integral (b) determine whether the integral converges or diverges converges? (c) evaluate the integral if it

A store clerk wants to stack 55 cans of tennis balls in a triangular display. How many cans would be in the bottom row?

30. ## Chemistry

Difference between hydration and hydrogenation reactions? I have searched everywhere in my book and all I can come up with is: Hydorgenation is when atoms of hydrogen H2 are added to the carbons in a double or triple bond of alkenes or alkynes to form what

31. ## physics

If the price of electrical energy is \$0.10 per kilo-watt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degree C? Can anyone please give me some hints to do it? Thanks a lot!

32. ## physics

A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/(Lo) does the length of the beam increase when the temperature changes from that on a cold winter day (-15 F) to that on a summer day (+105 F)? Can anyone please give

33. ## physics

if you charge a rubber rod with a piece of fur and bring the rubber rod close to the top of the gold-leaf electroscope, is it induction or polarization?

34. ## chem

How do u find the Hvap if you only know the slope is -.002 ?

35. ## Chemistry

Can someone tell me if this makes any sense or if I need to start over. I am not sure if it even answers the question. Why is the benzene molecule represented as “a flat cyclohexane with a ring inside?” The benzene molecule is represented as “a flat

36. ## chem

The rate data from a chemical reaction shows that doubling the concentration of A with the concentration of B remaining constant causes the rate to increase by a factor of four. What is the reaction order for [A]? a. 0 b. 0.5 c. 1 d. 2 e. 3

37. ## chemistry

Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. B. Dispersion forces affect all three molecules. C. H-O-H

38. ## physics

The world record for the discus throw is 74.08m , set by Jürgen Schult in 1986.If he had been competing, not on earth, but on Mars, where the acceleration due to gravity is 0.379 what it is on earth, and if he had thrown the discus in exactly the same way

39. ## Chemistry

For a lab, I had to react toulene with 1% I2 in dichloromethane. Would HI form as a result of this? Logically, I think there would be no reaction because toulene looks too stable. But a colour change occured. Why would this happen?

40. ## Chem

Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

41. ## Spelling

Hello Can Anyone help me spell the word ( ACK-ROW-NIM ) For Instance DOB Is An ACK ROW NIM For Date Of Birth. THANK YOU in Advance Robert

42. ## Physics

Aircraft with acceration of magnitude of 42.5 m/s. If starting from rest how long will it take to travel a 2.6 km runway?

43. ## math

i have 2 math questions i don't understand so if you could help me i would like that. Log base 3 64-log base 3 (8/3)+log base 3 2=log base 3 4r Log base 6 (b^2+2)+logbase6 2=2

44. ## English

1. How did the book Tom Sawyer relevant to Mark Twain's real life? 2. How did the boys feel when they were in jackson's island 3. Why did the author put the position of the chapters that way? 4. Descibe all-american boy 5. Descibe the life of boyhood in

45. ## American History

How did U.S. foreign policy at the turn from the 19th to 20th century affect actions taken by the United States towards China?

46. ## science

I did this experiment below with 6% molasses, 12%, and 25% molasses solution and I don't know If I should do a bar or line graph. Yeast Populations Student Materials Yeast is a single-cell fungus that produces carbon dioxide as a byproduct of cellular

47. ## chemistry

What is the molecular structure around the oxygen in water? What is the molecular structure around all the carbons in ethanol?

48. ## research paper

My class is writing a paper on China and India and I cant seem to find these topics. although a communist country, how has china opened its boarders to international commerce? Describe the benefits China and India have gained through their presences in the

49. ## research paper

i have to include these questions in my report, and i can't seem to find them anywhere, any help? What influences may China and India have on other Asian countries as their economies begin to emerge on the global scene? What benefits have American

50. ## Chemistry

Below is the question I am trying to answer. I think after much debate, I may have it. Does anyone know if I am close to being right? Does cis and trans isomeric compounds display different properties? Why? Cis means on the same side and trans means on the

51. ## math

You invest 3400 into account earning simple intrest. The balance is 4624 after 8 years. What is rate of intrest?

52. ## psychology

If Donna is highly creative? does she focus on one problem at a time or is she a convergent thinker

53. ## simple math

i just wanted to know how many significant figures in the number 100

54. ## sra mcguin

In english Hi Boys, This had been a very long trip. First I flew to New York and then waited 6 hours for the next plane. We finally made it to London. It is incredible here. The weather is great and the people are very nice. I saw Aunt Susan and Uncle

55. ## Physics

On a dt graph if there is a curve from 1 decreasing to 1.2 in an interval does is the velocity and acceleration + or 9? And is it slowing down or speeding up or neither?

56. ## chemistry

suppose a new car travels 70.0 miles on one gallon of gasoline with 40% efficient engine. how much fuel is wasted annually due to energy efficiency if in one yr, 478.26 gallons of fuel is burned?

57. ## chemistry

Among water, ethanol and isopropanol, Which has the largest molar mass.

58. ## English (Understanding Sentence)

It's from "Letter from a Birmingham Jail [King, Jr.]" Human progress never rolls in on wheels of inevitability; it comes through the tireless efforts of men willing to be co workers with God, and without this hard work, time itself becomes an ally of the

59. ## Trigonometric functions

1)I have a right triangle. the hypotenuse is 7 the opposite leg is x and an angle is 32. Which equation can be used to find x? A)sin32=x/7 B)cot32=7/x C)tan32=x/7 D)cos32=x/7 I chose D 2)A right triangle 26 is the hypotenuse,opposite leg is 15. Find A to

60. ## a bit challenging for me

i got a planning and design lab to do this is the scenario You are give an OR gate which registers 1, when the voltage is +5 volts or greater. Use this gate to determine the frequency of a voltage supply of peak voltage +5V. i don't know what to do..is it

61. ## dr wls - physics freak design problem

wls, If you get a chance could you look at the "a !@#\$%^&allenging" problem down a little from here. I am not sure my idea is the best.

62. ## Trigonometric functions

1)Which angle is coterminal with a -400 degree angle in standard postion? A)40 B)80 C)320 D)400 I chose A (for the next one I don't know what its called but it looks like 0 with a horizontal line through the middle.) 2)Find the exact value of cos looks

63. ## Math

How could you change the height of a cone so that its volume would remain the same when its radius was tripled?

64. ## English

Write me a sonnet. Make sure it sounds like something an 11th grader would write though. Thanks in advance.

65. ## STATISTICS

PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS

66. ## English

What kind of words that end in sion or tion rhyme with expression?

67. ## Chemistry

Below is the question I am trying to answer. I think after much debate, I may have it. Does anyone know if I am close to being right? Does cis and trans isomeric compounds display different properties? Why? Cis means on the same side and trans means on the

68. ## types of lesson plans

what are the types of lesson plans???

69. ## statistics

PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS

70. ## chemistry

The molecular structure around the oxygen in water is . The molecular structure around all the carbons in ethanol is .

71. ## statistics

Pinworm infestation commonly found in kids can be treated with the drug pyrantel pamoate. Research shows the treatment is effective about 90% of cases. The drug is administered to 25 kids. What is the probability that exactly 23 of them are cured? What is

72. ## calculus

how would you do this improper integral 1/(x-1) from 0 to 2 this is improper at one, so I split it up into two integrals ln(x-1) from 0-1 and ln(x-1) from 1-2 I then did for the first one the (lim t->1(-) of ln(t-1))-(ln(0-1)) and then the same thing for

73. ## Chemistry

Write a balanced equation for the overall reaction: Step 1 O3 + Cl --> O2 + ClO Step 2 ClO + O --> Cl + O2 = O3 + O --> 2O2 Is that correct? or would it be O3 + O --> O2 + O2

74. ## MANAGERIAL ECONOMICS

EXPLAIN THE ROLE AND RESPONSIBILITY OF MANAGERIAL ECONOMICS.

77. ## sra mcguin

Hi I am to write a postcard to someone in spanish - first I wrote it in english here it is - and we are suppose to use preterite verb forms.

78. ## research paper

our team has taken your advice on researching on the internet and libraries, yet we are still unable to find: What benefits have American corporations and the American economy gained through economic involvement with China and India? any help would be

79. ## science

an observation involving numbers??

80. ## Prealgebra

Please explain this problem: one fifth of 40

81. ## Chemistry

My question is why is benzene less reactive than 1,3,5-cyclohexatriene? I know that benzene does not undergo addition reactions and is extremely stable to oxidizing reagents. C atoms in benzene are connected by delocalized double bonds which make them

82. ## biology

Role of microvilli of cells of kidney tubules? Role of cilia in cells lining trachea?

83. ## Access Database - computers

I have to make a database to track university apartments in access. I am stuck trying to decide what type of tables and field names i should have. would it make sense to have a table for students including first, last names, address, city, postal code,

84. ## chemistry

In a mixture of ethanol and water, the strongest intermolecular force present between the two chemicals is

85. ## chemistry

Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

86. ## chemistry

Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons)

87. ## economics

What are example of trade flow, capital and labor flow information and technology flow and financial flows

88. ## chemistry

im confused with significant numbers how do you do them.. like for example 64 mL

89. ## managerial economics

EXPLAIN 5 FUNCTIONS OF MANAGERIAL ECONOMICS WITH SUITABLE EXAMPLE.

90. ## biology

what are 3 main types of agranulocytes?

91. ## Chemistry

My question is why is benzene less reactive than 1,3,5-cyclohexatriene? I know that benzene does not undergo addition reactions and is extremely stable to oxidizing reagents. C atoms in benzene are connected by delocalized double bonds which make them

92. ## Physics

For a given lens in a telescope, what are the two letters corresponding to the light that gives the worst and best resolutions, respectively? (E.g., if you think that C gives the worst and A the best resolution, answer CA.) A. Green B. Red C. Yellow D.

93. ## history

What were some of the accomplishments/achievments of the union called the Kinghts of Labour??

94. ## algebra

When solving a rational equation, why is it necessary to perform a check?

95. ## spanish sra Mcguin

can you help me edit this please Hi Muchachos, Esto había sido un viaje muy largo. Primero volé a Nueva York y en seguida esperé 6 horas el plano siguiente. Finalmente lo hicimos a Londres. Es increíble aquí. El tiempo es grande y la gente es muy

96. ## science

Why are bulls attracted to red?

97. ## ecology

what does an ecologist study?

98. ## Prealgebra

Please explain this problem: 150% of 54

99. ## Prealgebra

Please explain this problem: 25% of 162

100. ## bio

what are significants of Evolution of Eukaryotes ?

101. ## year7 - ICT

PLEASE COULD SOMEONE TELL ME WHAT A SCREEN SHOT IS IN ICT THANKS

102. ## Language and Literature

I am in 6th grade and need to do an "author page" or "author Biography" but have lost the outline of what is required. I know date of birth date of death city of birth education list of works, but can anyone tell me if there is more? Thank you in advance.

103. ## math

A is the point (1,2), B is (7,4) and C is (5,6). Calculate the length of each side of the triangle ABC.

104. ## factoring

factor these expressions A) x^4+x^2+1 B) x^10+x^5+1

105. ## math

Laura and Pam decide to meet at the library. They both leave the house on their bikes at 8 a.m. Laura pedals 5phm faster that Pam and waits 12 minutes for her friend who pedals at a rate of 10mph. After spending 2 hours at the library they return home

108. ## spanish

does anyone know the preterite forms of GUSTAR, IMPORTAR, and ENCONTRAR

109. ## Trigonometric functions

Find the value of Sec A. and I have a right triangle BC=30 and BA=34 A)17/8 B)9/17 C)15/17 D)17/15 I chose D

110. ## MANAGERIAL ECONOMICS

SIGNIFICANCE OF MANAGERIAL ECONOMICS?

111. ## health

can u find me a site with stating specific slang names for depressant drugs? cause i really can not find any :(

112. ## chemistry

name an isomer of pentane (that is not cyclic)and write down its structure

113. ## Philosophy

What are the twelve questions in the Myth of Adape

114. ## science

what is an observation involving numbers the second and third letters are u and a _ua__ _t_t_ _ _

115. ## Prealgebra

Please explain this problem: 175% of 200

116. ## Chemistry

How do i solve [A]=[A]0 x e^-kt for k

117. ## English

How do cameras in the courts arouse controversy about the right of privacy? What about the constitutionality of cameras in the courtroom?

118. ## science

explain how sound is transmitted through a medium?