# Questions Asked onNovember 19, 2006

1. ## Economics

1. Your roommate's long hours in chem lab finally paid off--she discovered a secret formula that lets people do an hour's worth of studying in 5 minutes. So far, she's sold 200 doses and faces the following average-total-cost schedule: Q = 199 & ATC = \$199

2. ## Physics Question

Find the point between Mars and the Sun at which an object can be placed so that the net gravitational force exerted by Mars and the Sun on this object is zero. We are given a chart with information on the mass, etc. of planetary objects. I know to use law

3. ## Chemistry

1. The standard heat of formation of glucose and lactic acid are -1274.45 and -694.04 kJ/mole, respectively. The molar heat capacity of the two compounds are 218.86 and 127.6 J/(mol)K a.) What is the total heat of reaction at 25 degree Celsius for the

4. ## Math-approximation with fractions:7th grade math

How do you find the greater fraction with approximation? 14. 5/12, 17/30 I know that you need to make 5/12 = 6/12 and 17/30 = 15/30 Then compare them to half or something? I'm confused?! Any clear help and instructions? There are hundreds of ways to make

5. ## History

Why were the shots fired at Lexington and Concord called the "shot heard 'round the world " ? The social and historical impact had a profound change in world history.

6. ## physics

A 110g hockey puck sent sliding over ice is stopped by a frictional force on it from the ice a) if its intial speed is 6.0m/s, what is the magnitude of the frictional force? b) what is the coefficient of friction between the puck and the ice? I am unsure

8. ## "Given Molality, calculate..."

"Given: An aqueous solution of C6H12O6 with a density of 1.18 g/ml" I) Calculate Molarity 1) It firsts asks me to, "State the moles of solute" 2) Calculate the mass of the solute in grams - I think I can do this if I know how to get #1 3) Later it also

9. ## Calculus

Note that pi lim arctan(x ) = ---- x -> +oo 2 Now evaluate / pi \ lim |arctan(x ) - -----| x x -> +oo \ 2 / I'm not exactly sure how to attempt it. I have tried h'opital's rule but I don't believe you can use it here. Any help will be greatly appreciated!

10. ## Precalculus

From a point on ground level, you measure the angle of elevation to the top of a moutain to be 38 degrees. Then you walk 200 m fartheraway from the mountain and find that the angle of elevation is now 20 degrees. Find the height of the mountain. Round the

11. ## chemistry

The more reactive an atom, the higher its potential energy. Which atom has higher potential energy, neon or fluorine? Neon is hardly reactive at all. When it reacts, it will make news. Fluorine is a very reactive element. It is very difficult to keep it

12. ## math HELP

for each pair of similar parallelograms,fid the ratio of two adjacent side lengths in one parallelogram and compare it to the ratio of the corresponding side lengthes in the other parallelogram. What are they wanting me to do?? A.2m 4m B.3 m 6m C.4m 9m

13. ## extrema

The function is given as y = 7x^3 - 8x^2 -16x +15 The max is at x = -4/7 & min is at x = 4/3 How do I know that it is local max&min or absolute max &min? (graphing calculator is not allowed) You know that it's a local minimum and maximum because the x^3

14. ## Algebra 2/Trig.

I forgot some stuff from my 7th grade algebra class about complex numbers...like what do you do with a problem like this 5+5i 3-i divided by + divided by 2-i 4+3i thanks.(divided by refers to dividing line in a fraction) In each case, RATIONALIZE the

15. ## Economics

The utility function of a consumer U(b,t)=Min(b,t) for where b=busfare and t=taxifare, b=3t for the same distance.For hundred times travel what will be the optimum number of busride and taxiride. If I understand your notation, bus fare costs 3 times a taxi

16. ## sociology

Who are hackers. What can we do to protect from them. Check this site for information about hackers. http://en.wikipedia.org/wiki/Hacker You can try to protect your computer from hackers by installing a firewll.

17. ## English

Diagram these sentances: 1Maggie woke me up with her silly crying. 2Darby cried, too. 3I awoke quickly. 4What was the matter? 5The hungery dogs barked and ran into the kitchen. Here are two wonderful websites that will help you with diagramming:

18. ## ccd

Did Jesus raise Lathyrus from the dead? i need to know by 2:00p.m. Please check this site for your answer. Note that the original story is told in John 11:1 http://en.wikipedia.org/wiki/Lazarus

19. ## local min

f(x) = x^4 + ax^2 What is a if f(x) has a local minimum at x=5. How do I justify the answer. The first derivative has to be zero at x = 5. You then check what the second derivative is at x = 5. If it is positive then that's ok. In this case you find that a

20. ## Math Riddle

How many two-digit numbers are multiples of 3 and also factors of 81? 3x=9 so try x=1,2,3,4 and see. I have been given a riddle that has driven me mad ... but worse, once given the answer. I just became baffled. Can anyone please explain why 487 is the

21. ## simple question

if i were writing a newspaper article and the title was "a civil family affair" and the article was about the irish war in which a sniper kills three people with one of them being his own brother, would the title be a good one or not? if not, please give

22. ## science

what does manipulated varible mean? what does responding varible mean? what does hypothisis mean? In an experiment, a manipulated variable is one that can be easily changed by the xperimenter, such as the length of a pendulum The responding variable will

23. ## Childhood Education Question--Plz Help

(should be Montessori! sorry!!) =) A "prepared enviroment" in a Montessori program features which? 1. child-size furniture and equipment 2. the accomplishment of one task before another is started. 3. a garden area where the children can plant flowers 4.

24. ## Work energy

Question Details Three masses m1= 5.0 kg ; m2= 10.0 kg ; m1= 15.0 kg are attached by a strings over frictionless pulleys. The horizontal surface exerts a force of friction of 30N on m2. If the system is released from rest, use energy concepts to find the

25. ## geography

chapter 11 section 1 the modern era emerges why did idustrialization create a higher standard living I don't have your book, but you can look for some of these ideas in your book. Industrialization provided wages and money to workers who hadn't had them

26. ## Science ENGR

Consider a laser which emits photons with a wavelength of 1.55 micrometers. The laser has a lower electron level Ei and an upper electron level Eu. A power supply pours electrons into the upper energy level and these electrons fall down in a time T= 0.1

27. ## Math Puzzler For Ken and BobPursley

Below is the original question and emailed response from my friend, Dr Ford, a theoretical physicist at Tufts University in Boston. Question: We have a normal watch. The big hand is 4cm long and the little hand is 3cm long. What's the distance between the

28. ## ecology

define Autotroph- Heterotroph- Herbivore- Carnivore- Omnivore- Decomposer- Scavenger- Bacteria- use an online dictionary

29. ## SIMPLE RESEARCH

HOW DID A COLONIAL ELECTION WORK. IF YOU COULDN'T READ OR WRITE HOW DID U VOTE? see below. http://www.answers.com/topic/election "In colonial America the election of church and public officials dates almost from the founding of the Plymouth Colony, and the

30. ## Physics

A car weighing 9800 N moves around a circular track of 70 m in 60 s. a. What is the speed or the car? b. What is the centripetal acceleration? c. What is the centripetal force? d. What is the coefficient of friction between the tires and the road? The

31. ## Math.... again......!!!!!!...

A fraction is equivelant to 4/5. The sum of the numerator and the denominator of the fractionis 36. What is the fraction? The fraction is 4x/5x where x is a number. You have that 4x + 5x=36, so solve for x, then you have what 4*x is and 5*x. The answer for

32. ## science

what is a chemical and physical change? http://www.onelook.com/ Type in chemical change, then physical change.

33. ## Chemistry/ Physical Chemistry

Napthalene is dissolved in a liquid with which it forms an ideal solution at 25C. The normal boiling point of napthalene is 80.2 C and ^fusH for napthalene is 19.0 KJ/mol. Determine the solublity of napthalene in this liquid at 25 C.

34. ## art

in art an abstraction is a styleised inturpeatation? Corrected spelling, if the answer is correct: stylized interpretation. Read at least the first sentence here, including all the links: http://www.artlex.com/ArtLex/a/abstraction.html =)

35. ## equation of a line

How to find a point on the line? x cordinate is given as x. The diagram is like a rectangle is inscribed in an isosceles right triangle whose hypotneus is 2 units long. AB is another side of the right triangle and P is a point on it(also a vertex of the

36. ## outback question

what are alot of the animals names in the outback. i need this question answered because i cant find it in textbooks or internet.

37. ## Physics

A book whose mass is 3 kg is projected up a long 40 degree incline with an initial speed of 25 m/s The coefficient of kinetic friction between the book and the Mane is 0.20. a. Find the magnitude of the friction force acting on the book as it moves up the

38. ## Ethics

Are hackers ethically wrong? i know they are but just asking for your opinion. Why they hack There many different reasons, for many different hackers. Some do it to see if they can beat security protocalls, like a game. Some do it to get richer, to use

39. ## Chemistry

Who used x-ray diffrection experiments for the periodic table http://www.chemistry.co.nz/henry_moseley.htm

40. ## ethics

Are hackers ethically wrong? What should we do about hackers? I think we should protect ourselves from hackers. What do you think? your suggestions? Yes. Hackers are ethically wrong. They are intruding into and disrupting a private space. Just as we lock

41. ## chem

There are several exceptions to the octet rule found along the transition and rare earth metal sections. These exceptions are tied to the observed phenomenon that atoms are more stable if orbital systems are either whole or half filled. In other words, the

42. ## science

what is naphthalene and what when it is droped in water at 70 centegrade what it is naphthalene: http://en.wikipedia.org/wiki/Naphthalene Your other question: I don't know.

I'm not sure what order these are when it comes to g-protein activation: -conformational change in receptor -hormone binds receptor -Gs protein has GTP bound -Alpha and gamma/beta subunits dissociate -GTP is hydrolyzed to GDP on alpha sububit -alpha and

44. ## History

In the colonies how did the colonist hold and election? If you couldn't read or write how did you vote? http://www.dinsdoc.com/carpenter-2.htm Press Ctrl + F and then type in vote to find the exact sections in which voting is described. Be sure you keep in

Weather Gone Wild -During this semester, I was to keep track of a current event. I chose researching extreme weather nation wide, but I was most interested in discovering if there was any sort of extreme weather happening around the United States, as well

46. ## Algebra II

[(z^n)^3] / [z^n*z^3] How can I set this up? I'm pretty sure you have to simplify so that it's z^3n / z^n+3 but where can I do from there? or am I messing up a step somewhere? (z^n)^3= z^3n and z^n * Z^3= Z^(n+3) so z^3n / Z^(n+3) = z^(3n-n+3)

47. ## rere

this is a stupid website it doesn't help as far as I can tell the experts all go ot sleep by now, leaving the late nite questions til the morning

48. ## Food Education

How is Sodium used in the body? I need to know this for some Food Tech reaserch. Thanks. Thank you for using the Jiskha Homework Help Forum. The body uses sodium to regulate blood pressure and blood volume. Sodium is also critical for the functioning of

49. ## Math

the only perfect number of the form x(n) + y(n) A perfect number is an integer that is equal to the sum of its positive divisors (not including itself). Therefore, 6 is a perfect number, since its positive divisors are 1, 2, and 3 and 1+2+3 = 6. 28, 496,

50. ## Physics

If a young girl is in a truck that is rolling down a hill with a force of 8765 N, what force must the brakes apply on the truck to have the truck roll at a constant speed? Would she have to apply more than 8765 N or less than 8765 N to get the truck to

51. ## Science ENGR Part 2

How many electrons are in the upper level? Problem 2 Problem 1 of chapter 6 of the course-pack. Use eqn. 2.27 for the definition of decibel. Eqn. 2.27 : A(w)=-20log|T(jw)| db Use the plot to calculate the repeater distance in a long haul optical

52. ## probability

christmas will come in december: Probability:100%

53. ## grammar

Dangling Modifiers If your baby does not like cold apple juice, it should be heated. Your answer: 1. Dangling Modifiers When they are fresh, eating oranges can often keep away the cold virus. Your answer: 2. Predication Our plans for tomorrow should begin

54. ## algebra

(2x+1)-(X-1)= to get rid of the second set of parentheses, you have to mulptiply by -1...so the x becomes -x and the -1 becomes 1. So, its 2x + 1 - x +1 = x + 2

55. ## Cell biology

which of the following will inhibit the release of calcium by hormone bound to Gq coupled receptor? A. PLC inhibitor B. PKC inhibitor C. Cholera Toxin D. Phosphodiesterase E. none of the above I said B. Which is not a characteristic of cell signaling

which of the following will inhibit the release of calcium by hormone bound to Gq coupled receptor? A. PLC inhibitor B. PKC inhibitor C. Cholera Toxin D. Phosphodiesterase E. none of the above I said B. Which is not a characteristic of cell signaling

57. ## MATH

WHAT IS 3/5 AS A DECIMAL divide 3 by 5. 0.6 you should get. the answer is 0.6