# Questions Asked onJanuary 24, 2008

1. ## physics

a metal spoon is placed in one of two indentical cups of hot coffee. Which cup will be cooler after a few minutes?

2. ## chemistry

How much heat would be released by the condensation of 5.40 g of steam at 100 °C and the subsequent cooling of the water to 25 °C? [ÄHvap = 40.7 kJ/mol at 100 °C; Cp for H2O(l) is 4.18 J g-1 °C-1]

3. ## Chemistry

Hey, can you help me balance this equation? Cu2S + HNO3 --> Cu(NO3)2 + CuSO4 + NO2 +H2O Thanks!

4. ## biology

how are glucose and ATP the same and how are they different...help would be awesome

5. ## Calculus

The function V=4pir^2 describes the volume of a right circular cylinder of heigh 4ft and radius r feet. Find the (instantaneous) rate of change of the volume with respect to the radius when r=6. Leave the answer in terms of pi.

6. ## Physics

How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.8 µC?

7. ## geometry

what is the formula for the area of a regular polygon?

8. ## calc

Find m and b so that y=mx+b is a solution to the differential equation dy/dx=1/2x+y-1

9. ## Geometry

is triangle XYZ with vertices X(-3,1), Y(2.4), Z(2.-5) a scalene triangle?

10. ## Math

Equal groups riddle. I am a number between 20 and 30. When you put me into 6 equal groups, there is an even number in each group and 1 is left over.

11. ## poem

We had to write a poem about some sort of abstract object or idea. Can you tell me how my poem sounds and if you could figure out what I'm talking about? "With me you can go on new adventures An undiscovered portal to the imagination. I do this in your

12. ## math

evaluate the exponential expression. write your answer as a fraction in simplest form. 1) ( 5 to the power of 3) to the power of -1 2)12 to the power of -2

13. ## AP CHEM

2-propanol has a delta Hvp of 701 J/g and a vapor pressure of 31.6 mmHg at 20.0 degrees C. Estimate the normal boiling point of this alcohol in degrees C. i used the clasius-clayperon equation and this is what i have so far. ln (31.6 mmHg/760 mmHg)= (-701

14. ## AP CHEM-URGENT PLEASE

at 25 degrees C liquid A has a vapor pressure of 100.0 torr, while liquid B has a vapor pressure of 200.0 torr. The heat of vaporization of liquid A is 32.0 kJ/mol and that of liquid b is 18.0 kJ/mol. At what celsius temperature will A and B have the same

15. ## math

when is partial factoring used?

16. ## Calculus

Find the value or values of c that satisfy (f(b)-f(a))/(b-a) =f'(c)for the function f(x)=x^2+3x+3 on the interval [-2,1]. I can't seem to get -1/2, the answer given. [((1)^2+3(1)+3)-((-2)^2+3(-2)+3)]/[1+2] =2

17. ## science

During reproduction, the sex cells containing the chromosomes M1 and Fl combine to form a fertilized egg..a. Whichalleles are on each of the chromosomes?

asked by katie sandly
18. ## English

What is the action verb and linking verb in this sentence: The day was warm and sunny.

19. ## critical thinking

How can a person distinguish between the prejudicial and nonprejudicial use of rhetorical devices?

20. ## algebra 1b

Solve each system using substitution. check your solution. a = 2/3b -3 a = 2b - 18 c = 3d -27 4d + 10c = 120

21. ## chemistry

Can you help me write and balance this equation. I also have to include the physical states. Question: When manganese(Mn)is put into dissolved hydrochloric acid(HCl)it produces solid manganese(III)chloride (MnCl3) plus hydrogen. Thanks :)

22. ## Calculus

I need to find the derivative of the following problem via logarithmic differentiation, but I'm getting stuck. I know how to solve via logarithmic differentiation, but I can't figure out how to re-write the exponent(s) as logs. Could someone help me? y=

23. ## mental

I have a question about the psychological syndrome called gaslighting. Have there been any recent case studies of actual "gaslighting" as it's seen in the 1944 film Gaslight where psychologist have proof of one individual purposely trying to drive another

24. ## Algebra 1

I am not good at these kinds of problems, so if anyone could show me how to do this, it would be great. Currently, there are about 270 million people in the U.S. The EPA set a goal of 35% of solid waste recylced by the year 2009. The estimate is that by

CAN SOMEONE GIVE ME A LIST OF THE CHARACTERS FROM ANIMAL FARM

26. ## science

1) In a syringe, what happens to the air paricles when you push the plunger? 2) In a syring, what happens the the air particles in the bubble from the bubble wrap when you pull up the plunger? 3) Are there more air particles in the bubble when it is

27. ## math

i am wondering if the following answer to my math problem is correct f(x)=x^3-4x-2 [2,3] We are doing limits and are suppose to use the Intermediate value thereom the answer i put was f(2)0

28. ## biology

How would gene splicing, cloning, or stem cells help a patient with sickle cell anemia?

29. ## 4th grade Algebra

How to solve this problem. 3X-Y=12

30. ## spanish

what are the parts of a spanish name like where does the fathers last name go in their childs name

31. ## Stats

Suppose the correlation between SAT Verbal scores and Math scores is 0.57 and that these scores are normally distributed. If a student's Verbal score places her at the 90th percentile, at what percentile would you predict her Math score to be?

32. ## spelling

glue is to sticks as thorns is to? Must begin with scr spr str thr!!

33. ## geography

Is there a certain rhyme out there to help study state capitals?

34. ## science

Does asexual reproduction use meiosis or mitosis?why?

35. ## Life Science

When would an organism need to undergo the process of mitosis? Meiosis?

36. ## earht science

as the rocks in earhts surface pend amd push on the land above them, what is formed?

37. ## math

x^3-4x-2 [2,3] we have to use the intermediate value thereom. not sure how to do this.

38. ## geometry

is triangle RST with verticies R(-1,5), S(-4,1), T(2,1) a isosceles?

39. ## geometry

is triangle DEF with verticies D(-3,-4), E(2.-5), F(0,1) a right triangle?

40. ## Linguistics

Hi I am looking for examples of voiceless/voiced words for the following places and manner of articulation: bilabial / nasal; alveolar/lateral; velar/stop plosive; velar/nasal; alveolar/stop plosive; post-alveolar/gliding; dental/friction;

41. ## geometry

what is the simplest form of 2 over 18?

42. ## geometry

rs/st=5/7 find the indicated value of x ._______________._______. R 2x+9 S 4x-15 T

43. ## math

how can u tell if a shape is whole? like does it have straight sides?

44. ## music

I need help studying for my term. I need to know how to identify stuff on a staff or musical notation. Like clefs, notes, signatures, etc... How should I remember these? Are there any online resources? I also need to define terms. How do I remember these

45. ## chemistry

Choose the groups of molecules below in which all the molecules have a net dipole moment. a. SiHCl3, O2, H2O b. HF, H2ClCH2, H2O c. HF, CH3Cl, H2O d. CCl4, HCl, NH3 e. HF, H2O, N2

46. ## Social Studues=) help me plz

What are longhouses made out of?

47. ## spelling

fifteen is to five as nine is to ? must start with one of the following :scr,spr,str, snd thr

48. ## Chemistry

What would increase the pressure inside a tank of helium gas?

49. ## spelling

broom is to sweep as brush is to ? answer must star with scr, spr, str or thr

50. ## physical science

How far can a person run in 15 minutes if they run at an average speed of 16km/hr?

51. ## social studies/science

who is Garter Brayton and what did he do.

asked by skiler allen
52. ## math

the 4X4 square represents 1/4 of a whole shape. create three possible whole shapes. justify how u know that each new shape is one whole.

53. ## studying

wut should i study for a social studies unit test in the 8th grade????

54. ## World History

1. Identify three peace efforts of the late 1880s and early 1900s. 2. Describe how each of the following served to inflame tensions in Europe:(a) nationalism, (b) imperial rivalries (c) militarism. 3. (A) Why did European nations form alliances? (B) How

55. ## sci

what are the challenges of managing reducing solid waste terrestrial resource issue?

56. ## statistics

For a particular sample of 50 scores on a psychology exam, the following results were obtained. Mean = 78 Midrange = 72 Third quartile = 94 Mode = 84 Median = 80 Standard deviation = 11 Range = 52 First quartile=68 What score was earned by more students

57. ## statistics

Answer the following: What does it mean to say that x = 152 has a standard score of +1.5? What does it mean to say that a particular value of x has a z-score of -2.1? In general, what is the standard score a measure of?

58. ## social studies

what are thomas jefferson's beliefs?

asked by R J Stevenson
59. ## Psychology

What do the results of twin studies on IQ say about John Locke's tabula rasa theory? I have to write an essay based on this question. Can someone help me with info on twin studies and IQ like between monozygotic and dizygotic? I also need help figuring out

60. ## Social Studies

I hope i can be helped with this question and i would be really grateful. I have being given an essay and the question goes like this. "How can helping others make one great". I would like at least three examples. Thank you.

61. ## Math

how would i solve this? 2x+2y=12 would i solve for x or y? Im stuck!!

62. ## Biology

1. In females the first meiotic cell division produces____cells. 2. One of the cells is ___ than the other and is called ______. 3. The polar body stays attached to the ____. 4. The larger cell is called the _____ and it mature into _____. 5. The second

63. ## English

I have been given an essay on should students be allowed to dissect frogs in their biology class. I have taken a positive stand but i don't know where i can get get help from. Can u pls help me?

64. ## math

is anyone on-line.

65. ## math

if 6 counters are 3/4,then what is one?

66. ## math

if o o o is 1/5,then what is one?

67. ## social studies

What part of the ndian Subcontinent does the Indus River Valley lie on?

68. ## social studies

What is Brahma?

69. ## Chemistry

The density of iron at 25 C is 7.871 g/cm^3 what is the volume of one mole of solid iron at 25 C? i understand that volume = m/d but how would i go about solving this?

70. ## math

i am having trouble iwth the following math problem: lim x->oo -x/squre root 4+xsquare I am not sure if i multiple the denominator with the numerator?

71. ## Pre AP Physical Science

If a person's average speed for a 10.00 kilometer race is 5.644 meters per second, what was her winning time?

72. ## math

i am wondering if the following answer to my math problem is correct f(x)=x^3-4x-2 [2,3] the answer i put was f(200

73. ## English

What definable elements make a poem categorized as Victorian Poetry?

74. ## algebra

1. 18 m/min = cm/s 2. 5.7 gal/h = c/min 3. 264 yd/s=? mi/h Anyone know the answers to these?

75. ## math

how do i get the answer with this problem 64 division bracket(16 divison 2.4)subtraction 16 bracket the answer should be 4 but how do i get that number

76. ## science

a 45kg skater pushes off from a wall with a force of 234 n. what is the sklater's acceleration?

77. ## algebra

If Olivia drove x km at 60 km/h and then twice as far at 80 km/h. In terms of x, how many hours did the trip take? Give the answer in simplest terms

78. ## Chemistry

I need to write and balance this equation: Sodium sulfate produces sodium oxide plus gaseous sulfur trioxide when heated. Thanks

79. ## science equations

what is the acceleration of a 8.4 kg mass if a force of 64.8 n is used to move it toward earth?f=mxa

80. ## math

rewrite the expression with positive exponents.pleaze explain thanks 1)20X TO THE -8 POWER Y TO THE -8 POWER

81. ## AP CHEM

what type of cubic structure is iron?

82. ## science equations

what force is necessary to acceleration a 32 kg dog at a rate of 23.6m/s2? f=mxa

83. ## chemistry

Assume you are in a lab with a test tube of sulfuric acid. You drop a piece of calcium into the tube. What do you observe happening in the tube? thank you

84. ## science equations

a boy standing n a high cliff dives into the ocean below and strikes the water after 2.5 s. what is the boy's velocity when he hits the water? deltav=gxt

85. ## chem

In the lab, you're handed a test tube with sodium chloride dissolved in water. You add aqueous barium carbonate to the tube. What are your observations? Thanks

86. ## History

Investigative reporters are bolder today than they were 30 or 40 years ago. How do you think the impact of Watergate has contributed to this boldness? Do you think investigative reporters are justified in being bold to get information for the public, or do

87. ## science

A person's body is thronw outward as a car rounds a curve on the highway is this newton's 1st 2nd or 3rd law

88. ## MANAGING A DAILY TEACHING SCHEDULE

WHAT ARE THREE TIME MANAGING TIPS FOR TEACHERS?

In a world without trade, what would American consumers have to pay for logitech's products?

90. ## Algebra

I am supposed to subtract and simplify if possible. This is backward to what we had in our homework so I am confused. two fractions 4-z/z-3 minus 7z-6/3-z I need to determine what z is?

91. ## Life Science

Why is the process of mitosis and meiosis both important to a living organism.What would happen if meiosis did not occur?

92. ## physical science

compute the density in g/cm of a piece of metal that has a mass of 0.520kg and a volume of 75cm

93. ## Calculus

An isosceles triangle, whose base is the interval from (0,0) to (c,0), has its vertex on the graph of f(x)=12-x^2. For what value of c does the triangle have maximum area?

94. ## Stats

Fortunately, plane crashes are rare events. Suppose that commercial crashes occur on an average (mean) of 1.1 per year (Hint: Poisson). a. What is the probability that this year will be crash free? b. If there is a crash, what is the probability that there

95. ## gov

Why does the constitution require those who serve as president to be at least 35 years old; those serving as senate be 30 years old; and those serving in the house of representatives to be at least 25?

96. ## Biology for Carol/Roderick

It would be helpful if you could use the same name consistently, please. Otherwise we think we are answering the same post over and over.

97. ## Calculus

Find the average value over the given interval. y=3x^5; [-3,3] I can't seem to get the answer, 0. 1/(3+3) [integral -3 to 3 (3x^5)dx] and I get 273/2

98. ## Question

Who is the american president? What adjectives can be used to describe him/her?

99. ## advanced fuctions

Determine the intersection point of the curves y=log(x-2) and y=1-log(x+1). Both of them are base 10

100. ## World History 10th grade

Identify three peace efforts of the late 1800s and rarly 1900s. (1)hoped for a permant end to the scourge of war. (2)a world court to settle dispute betwwen nations. (3)the struggle for women suffrage . tell me is this is right.

101. ## Math

Solve the system by addition 2x-4y=7,4x+2y-1 can show one show me how to do this.

102. ## MPG's- fuel economy

Which production car can you buy today that has the highest gas mileage?

103. ## Math

show that graphs of x-2x/x+2y=1/3 and x-y/x+y=3/5 coincide...how do you solve it?

104. ## chem

100 mL of LiNO3, 0.241 M is mixed with 240 mL of 0.618 M Ca(NO3)2. What is the final concentration of NO3- in the solution?

105. ## Holocaust

We would like to know about some info on the m=wonderful, Anne frank, So if anyone has some information on this, please write back. Thanks

asked by Angelo & Brooke
106. ## math

Adult tickets for a play cost \$13 and child tickets cost \$10. If there were 22 people at a performance and the theater collected \$277 from ticket sales, how many adults and how many children attended the play?

107. ## math

Adult tickets for a play cost \$15 and child tickets cost \$6. If there were 33 people at a performance and the theater collected \$360 from ticket sales, how many children attended the play? 14 children 15 children 16 children 18 children

108. ## world history

Why did European nations form alliances?

109. ## physics

How does air within winter clothing keep you warm on cold winter days?

110. ## math

Solve the system by substitution.x-5y=2 ,2x+3y=17

111. ## science

I need a couple of example for a compound beside cookies and soap.

112. ## math

The sum of two numbers is 76. The second is 8 more than 3 times the first. What are the two numbers?

The length of a rectangle is 8 in. more than twice its width. If the perimeter of the rectangle is 34 in., find the width of the rectangle.is it 1. 2 in. 2. 3 in. 3. 4 in. 4. 5 in.

114. ## Algebra

I have a problem, which requires I solve the following system of linear inequality graphically. my textbook is vague and does not provide online examples or instruction to assist me withinfo to work the problem. Please help? Thank you. 3x - y is lessor

115. ## Statistics

Here is my question: The size of dust particles was measured in a factory. Pictures of particles were taken with a camera attached to a microscope with 50x magnification. 9 imahes of particles were taken giving the following pixel areas of the interior

116. ## science

How does sickle cell anemia occur--what type of mmutation is it--is it a substitution, deletion, or insertion mutation--or is it all three? Also, How would gene splicing, cloning, or stem cells help a patient with sickle cell---would any of these be any

117. ## Electricity

A motor running at its rated power provides 2.6 lb-ft torque at its rated speed of 2020 rpm. The motor draws 5.6-A from a 230-V supply at a phase angle of 37 degrees. Determine the following: The horsepower delivered by the motor, The efficiency of the

118. ## Algerbra 1B

Solve Each Sysem Using Substitution. Check ach solution. a = 2/5b -3 a = 2b - 18 c = 3d - 27 4d + 10c = 120 Thanks, hope someone helps

119. ## world hisroty

Identify three peace efforts of the late 1800s and early 1900s. (1)The Hague Tribunal (2) Women Enternational League For Peace and Freedom (3) Nobel Peace Prize tell me if I'm on the right track.

120. ## gov

Didn't our founding fathers mean( " the right to bear arns") to only allow only countries to have guns for the protection of the people?

121. ## music

how is to triple eight notes played as

122. ## Math

The difference of two numbers(the second minus the first) is 48. The second is 8 less than 5 times the first. What are the two numbers?

123. ## Algerbra 1B

Solve Each Sysem Using Substitution. Check ach solution. a = 2/5b -3 a = 2b - 18 c = 3d - 27 4d + 10c = 120 Thanks, hope someone helps

124. ## science equations

my grand daughter is having a awful time with this and i can't help her but if you would explain it to me maybe i can help here goes a skier with a mass of 48kg moves with a velocity of 11.45 m/s east. what is the skier's momentum p=mxv.