# Questions Asked onMarch 9, 2007

1. ## Physics

A thin rod, of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass m is attached to the other end. The rod is pulled aside through an angle and released. What is the speed of the ball at the

2. ## pre-algebra

write an inequality for the sentence. The total t is greater than five. Well your answer is going to be T and the sign for greater than is simply >. So the answer would be T > 5 ok again my name is above. i was just wondering what pre-algebra was? i mean i

3. ## Math help??

Find the missing length of the right triangle if a = 7 and b = 24. Read the followng and see if it hepls to solve this. If you still don't get it repost your answer. http://en.wikipedia.org/wiki/Pythagorean_theorem a sqaured+b squared=c squared 7

4. ## calculus

find dy/dx y=ln (secx + tanx) Let u= secx + tan x dy/dx= 1/u * du/dx now, put the derivative of d secx/dx + dtanx/dx in. You may have some challenging algebra to simplify it. Use the chain rule. Let y(u) = ln u u(x) = sec x + tan x dy/dx = dy/du*du/dx

5. ## English

I'm writing a term paper for history, and I wondering which is correct: The 1920s was a period of... The 1920s were a period of... The first one sounds correct to me, but I want to be sure that the subject and verb agreed. According to all the information

6. ## algebra,math,help

Use Property 2 to simplify each of the following radical expressions. sqrt (10)/ sqrt(49) My answer: sqrt (10) / (7) THis next one i need help: Use the properties for radicals to simplify each of the following expressions. Assume that all variables

7. ## Physics

ELECTRIC FIELDS AND EQUIPOTENTIAL SURFACES 1.what condition must exist to have a region of nearly uniform electric fields 2.where are regions of strongest and weakest electric fields located Nearly always, there are flat equipotential surfaces. There are

8. ## Econ MC

Externalities cause markets to a. fail to allocate resources efficiently. b. cause price to be different than the equilibrium price. c. benefit producers at the expense of consumers. d. cause markets to operate more equitably. I think the answer is a)?? I

9. ## chemistry

NaCN + H2O = HCN + NaOH Is this equation balanced ok? Yes, it is balanced. thanks very much

10. ## Identifying Fallacies

Give example of fallacy from newspaper editorial and another one from an opinion magazine. We do not do your homework for you, but here is a great site for explaining fallacies. http://www.nizkor.org/features/fallacies/

11. ## Sequence

Find the common difference and a formula formula for the nth term of the arithmetic sequence; 6, 2, -2, -6, -10,...a sub n = a)6-4n b)6-2n c)10-2n d)10-4n I think it is c but want to check. Ao is 10, then each term subtracts 4n from it....n=1, ... well if

12. ## Physics

Zero, a hypothetical planet, has a mass of 1.0 1023 kg, a radius of 3.0 106 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial kinetic energy of 5.0 107 J, what will be its

13. ## English

Hello ^^ I need your help. I hope you can help me. Can someone please explain me these quotes and tell me what you think about them: A life without adventure is likely to be unsatisfying, but a life in which adventure is allowed to take whatever form it

14. ## donating to charity

What are the pros and cons of donating to charity? my opinion i could be wrong but the pros is helping others in need. By doing so you provide a good deed. Also put yourself in their shoes. As for the cons that sometimes individuals who aren't the needy

15. ## Algebra 2

I am trying to factor a 4th degree polynomial that does not have any rational roots. I need to somehow get it factored into two quadratics. Anyone know of a method to use. 3x^4 - 8x^3 - 5x^2 + 16x - 5 Two of the irrational roots are 1.135.. and 0.382.. but

16. ## Physics

Zero, a hypothetical planet, has a mass of 1.0x10^23 kg, a radius of 3.0x10^6 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial kinetic energy of 5.0x10^7 J, what will be

17. ## social studies Hinduism

Looking for information on hinduism: 1) Considering that Hiduism lacks a united belief system, what makes up the hindu religion? 2)What are the cultural and societal influences that have made hinduism vital to the region in which it originated? 3) Explain

18. ## Social Studies

HELP!! I am writing an essay about comparing and contrasting slaves and indentured servants, and I need help coming up with a conclusion paragraph!! Anyone have ANY IDEAS?!?!?!?!? Your concluding paragraph should not introduce any new information. It

A 0.21g sample of sulfuric acid is dissolved completely in sufficient water to make 0.25 litre of final solution. Calculate the hydrogen ion concentration in mol1-1 in this solution and show successive steps in the calculation: If 0.21g in 0.25l then 0.84g

21. ## psychologgy

I am having trouble with this assignment. I don't want answers to all of these but if you could help me with one so i get an idea of the assignment. no chart needed just an example. pleeze. thanks Using a simple chart for display, create mnemonics for the

22. ## criminal justice

How would advances in criminal justice technology would improve resource deployment. More specifically, in addition to giving an overview and several examples of advancing technologies in the criminal justice field, with the main focus on information and

23. ## chemistry

I have to draw Lewis structures for hydrogen cyanide and cyanogen with nitrogen valency of three. Would I still need 2 dots after the N in hydrogen cyanide or would this represent nitrogen with a valency of 5? Yes. THose two "dots" are unshared electrons.

24. ## calculus

relative extrema x^3 + 1/2x^2 - 2x + 5 Ok I have 3x^2 + x - 2 = 0 Am I on the right track? I think i know why I kept on asking for help with these pribelms. I forgot the step of factoring. Please check... 3x^2 + x - 2 = 0 (3x-2)(x+1)=0 x=2/3, x=-1 Correct.

25. ## Biology 101

What are the factors that cause cells to reproduce in mitosis and meiosis depends on the cells. there's a huge difference between a livwr cell, nerve cell, and a bacterial cell. probably your instructor is looking for answers like: growth, food supply

26. ## Change Analysis

Situation The regular night shift personnel at the warehouse were loading a truck backed up to the loading dock. A large convex mirror was placed high in the warehouse doorway to allow handcart personnel to see traffic approaching outside on the dock while

27. ## structural formulae

REACTION 1 IS A CARBON COMPOUND CONTAINING AN ALCOHOL FUNCTION GROUP + REACTION 2 IS A CARBON COMPOUND CONTAINING A CARBOXYLIC GROUP. IM TRYING TO UNDERSTAND THE PRODUCT FORMULAE. CAN YOU TELL ME HOW THESE TWO FUNCTION GROUPS REACT, AND THE RELEVANCY OF CH

28. ## physical science

i have 25 examination quesions i need answered. can you help me? We can help you with some of them if you post them individually and show your own work or thoughts. We don't do exams for you here.

29. ## Calculus

relative extrema x^4-2x^2+5 so far I know how to find the derivative which is 4x^3-2x now I am stuck... Please help Huh? 4x^3-2x=0 2x(2x^2-1)=0 and what are the roots? I will give you a hint: one is x=0 The other two are in the second parenthesis. Is it

30. ## chemistry

I am trying to work out the abbreviated structure formula of the products of the complete hydrolysis of tocainde together with any new functional groups formed. I am somewhat stuck and have got only as far as identifying the functional groups in tocaine.

31. ## history

Why were hobos called what they were? After the stock market crashed what did people do with their stock? hobo 1889, Western Amer.Eng., of unknown origin, perhaps related to early 19c. Eng. dial. hawbuck "lout, clumsy fellow, country bumpkin." Or from ho,

32. ## Math

Here's a chalenging one that i can't do at all. A deck of cards has 6 yellow, 6 green, and 5 black cards. You pick four cards from the deck. Cards are not returned after they are picked. What's the probability of picking- first not green, second not green,

33. ## calculus

Find the lenght of the sides of an isosceles triangle with a given perimeter if its area is to be as great as possible. let k be the the length of the two iso sides, so the other side is P-2k. Call that the base. Using Heron's formula:

34. ## factoring completly

can anyone help me with these: 3x2 + 17x + 10 5y8 - 125 a2 - 2ab - 15b2 4c2 - 12c + 9 5 y^8 - 125 = 5(y^8 - 25) y^8 - 25 can be written (y^4 - 5)(y^4 + 5) For the others, you need to try a few factors until you find a pair that works. For example, a^2 -

35. ## Math (limits)

Find the limit or state that the limit does not exist for 3sub n +2 / n Choices a)=0 b)does not exist c)=3 d)=2 I believe the answer is either 3 or 2 but I can't decide which. what is 3 sub n? sub n means subscript

36. ## Science Check

1)Two balls having the same mass of 1 kg roll toward each other, each moving at the same speed of 1 m/s. What is the combinded momentum? Would it be 0 kg m/s 2)A 30 kg girl and a 25kg boy face each other on friction free roller blades. The girl pushes the

37. ## genetics (again)

i asked this question...when subcloning a gene and inserting it into a vector you normally would use x-gal to locate transformants if x-gal is not available what are the alternatives...and thankyou for the alternatives but i was wondering if there was any

38. ## Math (triangles)

Given b=48, A=36 degrees find the remaining parts of the right triangle. B= a)144 degrees b)154 degrees c)54 degrees d)64 degrees We know that one angle equals 36 and since it is a right triangle another must equal 90. The sum of the angles of a triangle

39. ## Math

Why is this problem 37,1% correct. Sam scored 45 points againd Memphis in an NBA game. He made 13 of 37 shots what was his shooting percentage? Multiple choice test. 37% 37.4% 37.1% 37.3%

40. ## chemistry

A drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of "40m2". Assume that the oil film has a uniform thickness equal to the diameter of a oil molecule. Calculate the

41. ## math,help

What is missing of the binominal in the following: (radical 3 minus 2) ( ?) = -1

42. ## Research Paper

can someone tell me what the MLA style is? my textbook is requiring it for my paper but is not explaining it? Here are some MLA websites; the first one is the most thorough and the best: (Broken Link Removed)

43. ## Re: Physics/Math

Posted by Technoboi11 on Wednesday, March 7, 2007 at 1:09am. Zero, a hypothetical planet, has a mass of 1.0x10^23 kg, a radius of 3.0x10^6 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched

44. ## Math (triangles)

Given b=48, A=36 degrees find the remaining parts of the right triangle. a= a)51 b)35 c)66 d)29 and c= a)35 b)26 c)82 d)59 This one I'm lost on! a = b tan A = 34.8 (round it off to 35) c = b/cos A = 59.3 (round it off to 59)

45. ## Trigonometry Paper Urgent!!!

I am writing a paper on the 8 trigonometric identites but can't find any information on them. Please does anyone know of any websites that would have things like their history, development, applications in ancient times, origins, etc. Please help.

46. ## math,help

What are two consecutive integers whose square roots are also consecutives integers? 0 and 1 Thank you for helping me Rom how do you know that its 0 and 1....

47. ## math

the length of a rectangle is 7/8 yards and its width is 32/49 yards what is its area in square yards? 7/8 times 32/49 = 224/392 now simplify (the lowest common denominator is 56) so 224/392 = 4/7 So there is 4/7 of a square yard in the rectangle Thank you

48. ## SS Statistics

Hello. Does anyone have any statistic graphs of the Chinese and or Mexican Immigrants? Thx, Dallas Check the graphs at the bottom of the article. http://www.uagrad.org/Alumnus/im/

49. ## Williamsburg

Kobe Bryant scored 62 points against the Dallas Mavericks in an NBA game. He made 17 of 29 shots. What is his shooting percentage? The answer should be 17%. How do you get that? I have calculated the answer to be 58.6%. the score was 17 out of 29, so 17 is