1. Chemistry

Assuming the dissolution of borax in water is a spontaneous reaction, do you expect the change in enthalpy to be positive or negative or are both signs possible? Explain your answer A. Neither, enthalpy does not change, the positive entropy for the

2. Physics

partscoretotalsubmissions1--10/12--10/13--10/14--10/1----4--The tail of a vector is fixed to the origin of an x, y axis system. Originally the vector points along the +x axis. As time passes, the vector rotates counterclockwise. Describe how the sizes of

3. Physic

The free-body diagram in the drawing shows the forces that act on a thin rod. The three forces are drawn to scale and lie in the plane of the screen. Are these forces sufficient to keep the rod in equilibrium, or are additional forces necessary f3 ' ' ' f1

4. math...

We had to find the surface area of various rectangular prisms. I did most of them easily, but there are two that I need a little help with... The first one is: The length is 13m The width is 5m The height is 4m So what is the surface area? The second one

5. physics

The free-body diagram in the drawing shows the forces that act on a thin rod. The three forces are drawn to scale and lie in the plane of the screen. Are these forces sufficient to keep the rod in equilibrium, or are additional forces necessary I assume

6. Physics. Urgent help need!!

A baseball player hits a triple and ends up on third base. The baseball "diamond" is a square, each side with length 24.2 m, with home plate and the three bases on the four corners. What is the magnitude of his displacement? * I'm not familiar with the

7. Physics

The free-body diagram in the drawing shows the forces that act on a thin rod. The three forces are drawn to scale and lie in the plane of the screen. Are these forces sufficient to keep the rod in equilibrium, or are additional forces necessary f3 ' ' ' f1

8. Physics- Multiple Choice

I need help on these 3 questions. 1. The probability that an electron will return to a lower energy level by emitting a photon is called: a. spontaneous emission b. line emission c. the Bohr radius d. the ground state I'm thinking that this one is D. 2.

9. government

describe a hypothetical situation in which collective naturalization might be applied? We do not do your homework for you. However, if you will repost your answer, we will be happy to proofread and give suggestions.

10. Chem

Calculate the concentration of NH4+ from ammonium chloride required to prevent the precipitation of Ca(OH)2 in a liter of solution that contains .10 mol of ammonia ans .10 mol pf calcium ion. I got the two equations but I do not know where to begin. The

11. Chemistry

In a previous experiment, 0.800 g of the green complex iron salt was placed in an Erlenmeyer flask and heated with concentrated sulfuric acid until all oxalate ion was destroyed (CO2, SO2 and H2O are formed). Ferric ion (Fe3+) remained in solution and was

12. Physics

The tail of a vector is fixed to the origin of an x, y axis system. Originally the vector points along the +x axis. As time passes, the vector rotates counterclockwise. Describe how the sizes of the x and y components of the vector compare to the size of

13. yet another geometry question

Points D, E and F are the midpoints of the sides of triangle ABC. If AD=6, CF=4 and the perimeter of triangle ABC = 30, then find BE. If D is between A&B, E is between B&C and F is between C&A, then the perimeter is 6+6+4+4 + (twice length of BE)= 30 Solve

14. Chemistry

The solubility of KCLO3 at 25 degree celcius is 10.9 per 100.g of h20. question: If 15 g are addded to 100 g of water at 25 degree celcius with stirring, how much of KCLO3 will dissolve? Is the solution saturated, unsaturated, or supersaturated? please

A uniform solid disk with a mass of 40.3 kg and a radius of 0.454 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk (a) What is the net torque produced by the two forces? (Assume counterclockwise is the

16. Physics

A car is traveling along a straight road at a velocity of +36.0 m/s when its engine cuts out. For the next ten seconds, the car slows down, and its average acceleration is 1. For the next five seconds, the car slows down further, and its average

17. Religion

1. What three actions we are commanded to do by the seventh commandment? from http://www.vatican.va/archive/catechism/p3s2c2a7.htm "THE SEVENTH COMMANDMENT You shall not steal. The seventh commandment forbids unjustly taking or keeping the goods of one's

18. Chem

if 50 mL of .012M barium chloride are mixed with 25 mL of 1.0 x 10^-6M sulfuric acid, will a precipitate form? Calculate Qsp. Compare with Ksp. I never learned what Qsp is, what do I do? Qsp = (Ba^+2)(SO4^-2) [That's Ksp, also; however, Ksp is at

19. physical science

a reading on a sailboat shows that on December 21, the noonday Sun has an altitude of 86.5 degrees to the south. and the marine chronometer reads 7 a.m. wht are the latitude and longtitude of the ship.

20. trig

it says to verify the following identity, working only on one side: cotx+tanx=cscx*secx Work the left side. cot x + tan x = cos x/sin x + sin x/cos x = (cos^2 x +sin^2x)/(sin x cos x) = 1/(sin x cos x) = 1/sin x * 1/cos x You're almost there. thanks so

Considering the nature of a water wave , describe the motion of a fishing float on the surface of a lake when a wave passes beneath the float. Is it really correct to say that the float bobs straight "up and down"? Explain.

22. math

A real estate agent received a 2.5% commission on the sale of a home. If the home sold for \$259,000, how much was his commission? We will be happy to critique your work or thinking.

23. Chemistry

Which of the following is the best definition of Hess' Law? A. Heat evolved in a given process can be expressed as the sum of the heats of several processes that, when added, yield the process of interest. B. The enthalpy of a process is the difference

24. Social Studies

What your opinion on this statement? The only way for the Cold War to end is through eliminating one government policy. I'd say the opposite might be true. The only way for a cold war to end is by having one world government. By the way, the cold war ended

25. Physical Education

Hello, I am currently looking at Touch Football and creating a training program for Touch football. The training program needs 2 last for 8 weeks and needs to help improve performance. Using training principles and periodisation i have to develop a program

26. Chemistry

Devise a scheme for separating Al(NO3)3, AgNO3, Ca(NO3)2, and KNO3 from each other. The hint provided is to use the Ksp tables. Also, how could you isolate KNO3 from the solution in this question? How about using the Ksp tables and giving us your thoughts?

27. English

Frost's "Stopping by Words on a Snowy Evening" has many examples of figuative language. Here is the site, and here also is a site for figurative language. http://www.ketzle.com/frost/snowyeve.htm (Broken Link Removed) Figurative language:

28. math

A principal of \$5000 was invested in a savings account for 4 years. If the interest earned for the period was \$400, what was the interest rate? We will be happy to critique your work or thinking.

Find the coordinate of the image of the point (3,6) rotated with respect to the x-axis and the y-axis. I plotted the points and came up with (3,-6) and (-3,6) The choices for the answer is a)(6,-3) b) (-6,3) c) (-3,-6) d) (0,-6) Was I wrong or what did i

30. CALC

please help me...for the power series summation of n^4x^n/2(n-1)factorial....find the radius and interval of convergence... so far i am guessing that radius is equal to x and interval of convergence is (-infinty to positive infinity) is that correct? You

31. baily

juanita practiced the piano 3 hours for 10 days. for the next 16 days she practiced 2 hours a day. write an expression showing how much time juanita spent practicing the piano. use your expression to find how much time juanita practiced 3*10=x 2*16=X

32. Chem

Aqueous solutions of Zn+2 and Pb+2 both .0010M. Both form insoluble sulfides. Appx. what pH will allow maximum precipitation of one ion and leave the other in solution? Do I just use Ksp and the equations? If so what do I do next? See the selective

33. Would you take this survey, please?

This is an assignment I have for a sociology class, to have people fill out surveys. Lot's of fun. Thanks! 1. What is the most important thing in your life? 2. How do you determine right and wrong? 3. Are you a good/bad person? How do you know? 4. What is

34. physics

A trapeze artist, starting from rest, swings downward on the bar, lets go at the bottom of the swing, and falls freely to the net. An assistant, standing on the same platform as the trapeze artist, jumps from rest straight downward. Friction and air

35. calculus-integration

integrate -2/xln^4(x)...plz help me..give me an idea on how to start..plz The derivative of the ln(x) function is 1/x and this is multiplying the ln^4(x). You can thus write the integral as: -2 * 1/5 ln^5(x) + constant. is that the answer? wut about the x

36. Chemistry

An empty crucible was heated to drive off any volatile impurities and weighed after cooling (see below). A small amount of the green complex iron salt was added to the crucible, weighed again, and then heated gently to remove any waters of hydration

37. Algebra 2

Posted by Christian on Monday, May 7, 2007 at 11:34am. The area of a rectangular blanket in square centimeters is 40x^2+2x-65. The width is 4x-5 cm^2. Find the dimensions of the blanket in terms of x. For Further Reading Algebra 2 - Brown, Monday, May 7,

38. another geometry question

BD is a perpendicular bisector of triangle ABC. XZ is a perpendicular bisector of triangle WXY. Triangle ABC is similar to triangle WXY with a scale factor of 1:2. Part I. Find BD, AB, WZ, XZ and WX. Part II. What is the scale factor of the perimeters of

39. math

The length of a rectangular garden is 4 ft less than 3 times its width. If the perimeter of the garden is 40 ft, find the dimensions of the garden. We will be happy to critique your work. We are not inclined to do it for you.

40. Chemistry

Which of the following is NOT true about the thermodynamic standard state? A. A pure liquid is in its standard state at 25C and a vapor pressure of 1.00 atm. B. A gas is in its standard state when its pressure is 1.00 atm and its temperature is 25C . C. A

41. Chemistry

When 0.643 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 105C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

42. math

Identify the vertex of the parabola xsquared-8x-28y-124=0 We will be happy to critique your work or thinking.

43. French 1

I have to translate the foll phrase into french and then rewrite them using possive instead of de and the prepositional phrase 1. THE CASTLE OF THE KING a.Le chateau dole roi b.? 2. Annick's apartment. a.Annick appartment b. ? 3. His cousin is the daughter

44. english

comparisons between twelfth night and merchant of venice Thank you for using the Jiskha Homework Help Forum. First of all be sure you have read both plays! 1. http://shakespeare.mit.edu/twelfth_night/index.html (Twelfth Night) 2.

45. math

Can someone help me figure this out. The difference of two numbers is 80. The second is 8 less than 5 times the first. What are the two numbers? first write an equation 5x-8=y and then solve it Tiff gave you part of the solution. 5x-8=y However, there is

46. Physics

A string is attached to a wall and vibrates back and forth, as in Figure 17.18. The vibration frequency and length of the string are fixed. The tension in the string is changed, and it is observed that at certain values of the tension a standing wave

47. physical science

it's 6:00 am in freetown, sierra leone on may 1st,2007, what time and date is it in chicago Since this is not my area of expertise, I searched Google under the key words "world time zones" to get these possible sources:

48. algebra 2

what is two solutions that are the same? what is relations between x and y? what is the intersection of two inequalities of a fesible region? what is another word for a number? what is sequence with no end or without bound? what is sequence with an end?

49. Elem. Ed.

Which would not be a benefit for a child when their parent participates in their classroom? 1.the child feels special and important. 2.the child feels transitory distress by having to say good-bye to a parent twice in one morning. 3.the child's feeling of

50. MATH!

The length of a triangle is twice the width. The area is 32 square units. Find the length and width. I have the length of the triangle=2x and the width=x... so would the equation be 2x(x)=32 OR NO? Assume the "length" is the height measured from some side

51. chemistry

where can i find printable worksheets from prentice hall for chemistry? I looked, but could not find any from PH online for any grade level. nor did I.

52. math

At 1:00 p.m., a car leaves a city and travels north at a rate of 55 mi/h. An hour later, a second car leaves the city and travels south at a rate of 60 mi/hr. At what time will the two cars be 285 miles apart We will be happy to critique your work or

53. Buddha Story....

May I post a Buddhist Koan (parable or riddle) that I wrote myself and get a critique of it? I already showed it to some of my Buddhist friends at the Pao Fa Temple and they really liked it. No. It is not homework, and we do homework help, and do that

54. math

Write an equation for the translation of circle x^2+y^2=25, 2 units right and 4 units down. We will be happy to critique your work. We are not inclined to do it for you. what is a bird 2-2

55. Math

The base of a solid S is the simicircular region enclosed by the graph of y = the sqrt of [4-x^2] and the x-axis. If the cross sections of S perpendicular to the x-axis are squares, the the volume of S is...? I've worked this out a few ways using what I

56. Algebra 2

The area of a rectangular blanket in square centimeters is 40x^2+2x-65. The width is 4x-5 cm^2. Find the dimensions of the blanket in terms of x. What is this question? like a foreign language or something

SO CONFUSED!!! Why can't submarines go to the bottem of the ocean? It is to do with pressure gradient Total nonsense. Subs go to the bottom of the ocean each time they sink. Now if there is an inversion layer, either thermal or salinity, they can "float"

58. Chemistry

is there an equation to find mass percent....if know concentration and and final and initial volume of a titration lab? there isnt one then how do you find mass percent? M x L = mols of titrant. From the equation, convert to mols of unknown. Mols of

59. psychology

Can someone provide a website or something that compare and contrasts the influence of heredity and hormones on human behavior? Thankyou. Check these sites. http://www.annalsnyas.org/cgi/content/abstract/1021/1/134

60. Maths/Science

Please could someone remind me how to calculate mean speed? I have to work out the mean speed of lava flow that travelled 13.5km over 21 days. I don't expect the answer, but some help on how to obtain it would be heplful! Thank you. All you can do is

61. algebra

Please can someone help me? Thanks! Find the least common multiple of each pair of polynomials: 12x^2-6x-126 and 18x-63 Simplify each sum: 5y+2 2x-4 ---- + ----- xy^2 4xy

62. Social Studies

how many war planes created in 1943 http://www.acepilots.com/planes/main.html This site should give you the information you need.

63. Economics

What is the % of GDP is the national debt? My Answer: The percentage of GDP is national debt is approx. 77%. Is this correct? Please post the figures you're using for GDP and national debt. I went and used the latest figure of Real GDP which was the third

64. geometric mean

Eighteen is the Geometric Mean of 12 and what number 18 = sqrt (12 x) Solve for x. The answer is an integer, and it isn't 24 (That's the arithmetic mean). cheese is yellow

65. Algebra -polynomial

Solve the polynomial 40x^2+2x-65 Notice that for x = 1 the value is -23. The number 23 is a prime number and the only factors are thus 23 and 1 up to signs. So, you can simply the search for the factors of the polynomial a great deal by substituting: x = 1

66. math

secret riddle worksheet riddle: why did the teacher wear sunglasses? 1) different x's _ _ _ _ _ _ _ _ 2) monomialor sum of monomials P O L Y N O M I A L 3) set of data graphed as ordered pairs in a coordinate plane S C A T T E R P L O T 4) 2 solutions that

67. trig...again

gahh i cant figure this one out either. you have you verify the identity only using one side of the equation: sec^2x*sin^2x+sec^2x=-1 this identity cannot possible be true. on the left side you are adding 2 squared quantities, how can that result be

68. philosophy

what would john locke think about the sci-fi movie "total recall" He believed men were driven by greed. The villian in the movie was just as greedy as they come. http://en.wikipedia.org/wiki/John_Locke

69. social sudies

im working on a project about the rivers of japan. can anyone recommend a site? http://en.wikipedia.org/wiki/Category:Rivers_of_Japan thanks a million dude!

70. Buddha....

Why does Buddha hate me? We are a homework help group that assist students in learning. Your questions are becoming far removed from that goal. If you have questions relating to homework help, we will be happy to assist you. We do not do personal

71. math

Translate the following statement into an algebraic equation. Let x represent the number. 9 more than 10 times a number is 5 times that same number.

72. math

Solve. 15x – 2(6x – 0.865) = 2x + 0.365 We will be happy to critique your work or thinking.

73. math

A long-distance phone call costs \$0.84 for the first minute and \$0.58 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding \$6. Let N be the number of minutes. Write an

74. math

What interest will you pay on a \$900 loan for 1 year if the interest rate is 12%?

75. math

3-4 If you think about this on a number line, it isn't too hard. So picture a line with negaitive numbers on the left going to positive numbers on the right. Something like this... -5 -4 -3 -2 -1 0 1 2 3 4 5 So you want to start and the positive 3 and go

76. Chemistry

The given actual molarity of sulfuric acid was .08M. How do I calculate the absolute error and percentage error? Your question isn't complete? Did you experimentally measure the molarity? Or was it somthing else? If you measure the value experimentally,

77. Calculus

please help me...for the power series summation of n^4x^n/2(n-1)factorial....find the radius i am guessing the radius is either x or x/2 but i am still not sure..CAN someone help me plz? PLZ HELP ME...i don't know where to start Take the ratio of two

78. calculus

integrate ((x^3/6)+(1/(2x)))*squareroot of 1+(x^4/4)+(1/4x^2)-1/2..plz help me...tnx in advance!

79. Physics

I hope someone can help me, cause i am so confused. Pressure gradient-why can't submarines go to the bottem of the ocean? please help! Stop the multiple posts. I am a volunteer, and it is a waste of time to go through the same posts.

80. algebra

what expression raised to the third power is 81x^12y^8z^16 answer is 3x^4y^2z^4 No. 3 cubed is 27, and 4 cubed is 64, and (z^4)^3= z^12

81. CALC

i still need help on this...integrate (-2)/(xln^4(x) dx...should i be using substitution ...if yes then wut should i substitute? plz help me..thanks in advanced! at is wrong with u= 1/x and dv= dx/ln^4(x) ? remember d/dx (lnx)^-n= (-n/x)*lnx)^(n-1) okey

82. science

how do the moons stay in orbit around jupiter http://www.synapses.co.uk/astro/moon1.html Thanks

83. Elem. Ed.

Can you please help with this question? The most well attended parent meetings are those that are based on: 1. the teacher's assumptions of what parents need to know. 2. the planned and prescribed curriculum of the parent education manual. 3. the needs and

84. French

Can someone edit this? Mon rêve a commencé dans un ascenseur. J'allais au cinq millième cinq cent et cinquante cinquième plancher. Pendant que j'étais dans l'ascenseur j'ai rencontré un petit garçon. Il était pâle et calme et tenu à la fin de

85. geometry question

A park has 2 bike trails in the shape of similar quadrilaterals. Trail A has side lengths of 75m, 93m, 114m and 129m. The shortest side of Trail B is 100m. Luis rides his bike around Trail A twice and Tara rides her bike around Trail B once. Who rode the

86. MATH!!

The area of Mrs.Raders rectangular garden is 100 square feet. One side is a stone wall. She encloses the other 3 sides with 30 feet of fencing. What are the dimensions of her garden? I have the length of the triangle to be 30-2x and the width to be x. But

87. pledge

What is the pledge of allegiance??? aren't you a little young to be on jiskha. I pledge allegiance to the flag of the United States of America, and to the Republic for which it stands, one Nation under God, indivisible, with liberty and justice for all.

88. ETHICS

HELP! This is my assignment(below) and i can't seem to get started I need help, can anyone point me in the right direction? Write a 1,050- to 1,400-word research paper identifying the linguistic, political, social, economic, religious, and familial

89. French

Can someone edit this? Mon rêve a commencé dans un ascenseur. J'allais au cinq millième cinq cent et cinquante cinquième plancher. Pendant que j'étais dans l'ascenseur j'ai rencontré un petit garçon. Il était pâle et calme et tenu à la fin de

90. health services

What challenges may be preventing a health and human service agency from meeting certain needs? 1) Lack of funds 2)People don't seek treatment because of too much paper work or they are shy. 3)Patients don't stay on meds long enough to completly eradicate

91. Social Studies

What your opinion on this statement? Eliminating communist ideas in a democratic country is a contradiction. Yes it is a contradiction. See: http://en.wikipedia.org/wiki/McCarthyism

92. Social Studies

What your opinion on this statement? The only way to have a successful communist government is to have a corrupt leader. well that sorta depends dosent it? in all honesty i would say it appears more often but i wouldnt say 100%. Your statement is no more

93. math

Find the mean.–9, –2, 3, 10, 13, 15

94. math

Solve: – 5 = – 3

95. Sociology

As an assignment for this class as we study cultures and world views, I have to have strangers fill out a survey. I would really appreciate it if you could take a moment and answer these questions! Thanks! Age: 17 or less 18-29 30-49 50+ I’d rather not

96. math

Write an equation of a circle with the center(-5-8) and radius 2. We will be happy to critique your work. We are not inclined to do it for you.

97. math

Write an equation of a circle with the center (-5,-4) and radius 6. The general equation for a circle is (x-a)^2 + (y-b)^2 = r^2, where r is the radius of the circle and (a,b) are the (x,y) coordinates of the center. Make the appropriate substitutions and

98. math

how do you solve: integral:(x-1)sqrt(x) dx There aren't any limits of integration Add the integrals of x^3/2 dx and -x(1/2) dx. Use the rule that the integral of x^n is x^(n+1)/(n+1), where n is any constant.

99. final project

what is a pearl? http://en.wikipedia.org/wiki/Pearl

100. religion

2. What four actions besides stealing are forbidden by the seventh commandment? See my response below.

101. religion

i need to write an essay on mass as a sacrafice. i need help on sacrifice in natural religion, the Old Testament beckround to sacrafice, and the relationship of the mass to sacrafice and calvary PLEASE HELP! Since this is not my area of expertise, I

102. Physics- really fun!

okay so i lied, it's not fun, sorry. pressure gradient-why can't submarines go to the bottem of the ocean? Thank you for using the Jiskha Homework Help Forum. but posting so close together with the SAME question is considered "flooding." It is worth

103. spelling

how do you divide the following words (attachment and ugliness)? I found these at dictionary.com. at·tach·ment ug·li·ness

104. Math

7th grade--how do I determine the slope of a set of stairs? Thanks you find it by measuring thr rise over the run i.e. the vertical distance divided by the horizontal distance. thanks

105. random

I dunno. Why don't u wait 4 a teacher 2 answer that? I guess any grade that can type and ask Qs. :p any grade.

106. inspirational poems

Can you give me a website for inspirational poems please? http://www.businessballs.com/ifpoemrudyardkipling.htm Besides "If", see the list at the bottom of the page..."Do not stand at my grave and weep" is pretty strong. Thank you so much!!!!! I didn't

107. gemoetry word question

can someone tell me the missing leg of the right triangle if 10 is the other leg and 26 is the hypotenuse its 16 "confused gurl" is indeed confused a^2 + 10^2 = 26^2 a^2 = 676-100 a^2=576 a=24 Your triangle is simply a multiple of one of the basic

108. Science

On rainy and humid days, you should add less waer then the recipe calls for. On dry days, you should add more. Speculate what might happen to pastry dough that doesn't include enough water. It would break apart because of not enough hydroscopic force.

109. U.s.history

How did womens experiences in civil rights and antiwar protests increase their awareness of sexism? A feeling of equality. I think they were aware of sexism well before the civil rights movement. For example, during World War II in the United States, women

110. algebra

How do you simplify -4x ---- x-x^2 thanks! Take an x out -4 --- 1-x it said the answer was -4 --- x-1