# Questions Asked onApril 3, 2007

1. ## Physics

One end of a uniform meter stick is placed against a vertical wall. The other end is held by a lightweight cord that makes an angle, theta, with the stick. The coefficient of static friction between the end of the meter stick and the wall is 0.390. A. what

2. ## Geography.../what does this mean?

" The earth's physical landscape is the result of conflict between forces..." Explain what this means. Thanks. Is it possible that forces move Earth around, sometimes the movement is opposing another landforce, they collide, and one slide under?

3. ## Micro Economics

A nation's production possibilities curve is "bowed out" from the origin because a. resources are not equally efficient in producing every good c. resources are scarce d. wants are virtually unlimited . John has a paper route and spends all his weekly

4. ## Earth

1. If the Earth were the size of B-B (with a radius of about 0.2 centimete), how big would the Sun be? How big would the Milky Way be? 2. Imagine building a model of the Solar System on your campus. Work out the diameter and spacings of the planets in

5. ## Geomentry

What is the converse of the theorem statement: If a line parallel to one side of a triangle intersects the other two sides, then it divides the two sides proportionally. If two sides of a triangle are divided in the same proportion, then the line

1) Two identical automobiles have the same speed, one traveling east and one traveling west. Do these cars have the same momentum? Explain. No. Same car, same mass, same speed, but different velocity. correct. Momentum is a vector.

7. ## economics

what would a horizontal aggregate supply curve imply about producer behavior? What would a vertical AS curve?

8. ## AP CHEM!

IM SO CONFUSED PLEASE HELP! H2 +CO2-->H2O + CO When H2 is mixed with CO2 at 2,000K, equilibrium is achieved according to the equation above. In one experiment, the following equilibrium concentrations were measured. [H2]= 0.20mol/L [CO2]= 0.30mol/L

9. ## math

The shorter diagonal of a rhombus is 10 inches long, and the angle the diagonal forms with the side measures 60º. Find the area of the rhombus. I really don't know where to start. I know that the area formula for a rhombus is A=1/2*d1*d2 So if I know that

10. ## Physics

Newton's second law states that if an object has zero acceleration, the net force acting on it is zero. My question is if you have an object at constant acceleration moving downward is there a net force being applied to it? Does constant acceleration= zero

11. ## Economics

If the income elasticity of demand is 3/4 and the interest elasticity of demand is -1/4, by what percent does money demand rise if income rises 10% and the nominal interest rises from 4% to 5%. Thanks!

12. ## math,help

Okay i am still trying to understand how to come up with a radical expressions and their applications, and apply to your daily life. I need more examples if any can help me out .... Is there a way of modeling it if i wanted to use a house for instance i

13. ## Physics

A non-uniform beam of length L and weight w makes an angle of è with the horizontal. It is held in position by a frictionless pivot at its upper-right end and by a cable a distance of farther down the beam and perpendicular to it. The center of gravity of

14. ## math

I need to know of a shape that has 4 sides and 3 vertices. There is no planar figure with 4 sides and 3 vertices. 3 vertices and 3 sides define the minimal planar shape of the triangle. The addition of a 4th side would require 2 additional sides and 1

15. ## C programming

how would you write a program that translates an alphabetic phone number into numeric form enter phone number: CALLATT 2255288 Thank you for using the Jiskha Homework Help Forum. Here are links about existing programs:

16. ## Math

My neighbor hired me to plant 10 trees. However, he wants 5 rows of 4. How am I going to do this just using 10 trees? you cant you need 20 trees or just do 2 rows of 5 is this is an actual math question and not a real life question then the answer is

17. ## chemistry/ molarity, molality

A solution is made by mixing 20.0 mL of C6H5CH3, d=.867g/mL, with 140.0mL of C6H6, d=.874g/mL. assuming that the volumes add upon mixing, what is the molarity? what is the molality? i know that molarity= moles/L and molality= moles sol/kg solvent... but im

18. ## social studies

if you do it once, it's good. If you do it twice on the same day, it's a serious crime. what is it? One possibility is getting married (to different people). However, both don't need to be done the same day to be a crime. I hope this helps. Thanks for

19. ## Earth

1. The great galaxy in Andromeda has an angular diameter along its long axis of about 5^0. Its distance is about 2.2 million light years. What is its linear diameter? angle*distance= arc distance. You need the angle in radians to do this.

20. ## Science

What object in the solar system has a composition similar to that of the gas giants? Well, it is definitely NOT the Sun. The closest other is a comet. I am not certain what your teacher had in mind here. Describe how a rock can fore by evaporation. What

21. ## chemistry

A student performed the freezing point depression experiment according to directions but mistakenly recorded the mass of lauric acid as 8.300g instead of8.003g. The calculated molar mass of the unknown acid will be GREATER/LESS than true value b/c mass of

22. ## Calculus

1. A rectangular box is to be constructed from 2 different materials. The box will have a square base and open top. The material for the bottom costs \$4.25/m2. The material for the sides costs \$2.5/m2. Find the dimensions of the box with the largest volume

23. ## Physics

If two objects have the same momentum does the velocities of the objects necessarily have the same magnitudes? No. Consider the mass. Momentum is mass * velocity

24. ## physics-heat

One cant solve this without knowing the time involved, or the mass of steam. steamers are vessels you can use to cook food in.food in steamer gains heat as the steam condenses on it.a boiler supplies steam at 105 degree to a steamer at the tare of 445 g

25. ## Biology

how can you determine the difference between meristem and xylem/phloem cells under a microscope? http://www.purchon.com/biology/xylem.htm

26. ## Geo.

1.What two events set eras? 2.What existed over most prairies? Please help. I meant what existed over most prairies in the mesozoic era. dinosaurs? Thank you for using the Jiskha Homework Help Forum. Hopefully, this site will help you:

27. ## Tutor

does anyone know where i can get a free interactive online tutor? I don't really need it all the time, I just need one for math when I'm confused. You guys all do a great job but I was wondering if anyone knows where a tutor would be. Anywhere from AIM to

28. ## science

whaen an atom has an equal number of protons and electrons, the charge of the atom is _________________? Since they are equal, they cancel each other out. The charge is zero. I hope this helps. Thanks for asking.

29. ## Physics HELP!!!!!!!!

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration

30. ## analogies

I need help with this analogy. person:unimportant::idea: sporadic, reticent, trivial, quiescent, or raucous I have no idea what the answer is!! Help me!! trivial. Now why, that is important. Hint: what do unimportant and trivial have to do with each other

31. ## algebra help

The cost of producing a number of items x is given by: C = mx + b In which b is the fixed cost and m is the variable cost (the cost of producing one more item). (a) If the fixed cost is \$40 and the variable cost is \$10, write the cost equation.and then

32. ## Chemistry

I am still not understanding this one at all. Draw the structure of the reaction product of 2-methyl-1pentene with H2 in the presence of platinum catalyst. This is the exact question it does not say cis or trans. I didn't follow DrBob222's reply, but I

33. ## Driving School

How can you consume alcohol and remain sober. Also what is the fomula for getting sober? 1) You can't, some humans are more tollerant. 2. That's easy, don't drink. How can passengers in your care impair your driving? If they're cutting up, making a lot of

34. ## Astronomy

Suppose that, in the future, observations with some new telescope reveal a planet about 16 AU from a star whose mass is the same as our sun's mass. How long does it take the planet to orbit the star? Use Keplers law. You know at 1AU the period is 365

35. ## Chemistry

Na reacts violently with H2O to produce NaOH and H2. The resulting solution has a higher T than it did before the Na was added. What are the expected changes? deltaH ? deltaS >0 deltaG 0 I know the last three for a fact. Is deltaG "

36. ## Finance

Campus Print Shop is thinking of purchasing a new, modern copier that automatically collates pages. The machine would cost \$22,000 cash. A service contract on the machine, considered a must because of its complexity, would be an additional \$200 per month.

37. ## maths-algebra

solve these similtanious equations using an algebraic method 4x+3y=21 2x+y=8 you must show your working multiply the second equation by two.. 4x + 2y=16 Now subtract that equation from the first.

38. ## social studies

what is a plurality model IT means the winner does not have to get the majority vote, but has to get the most votes. For instance three folks run, one gets 45 votes, one gets 35 votes, and one gets 20. The winner is the 45, even though she did not get a

39. ## analogies

Whilwind, breeze: Downpour is to ?? The answer starts with scr,spr,str,and thr Sprinkle? Spray? Stream? You could try the on-line Rogets Thesaurus, type thesaurus into google. rain, mist, drizzle

40. ## Transfer Pricing

The per unit cost details are as followers: Machining Finishing Transferred in cost N/A \$27 Variable cost \$24 9.00 Allocated fixed costs 3.00 13.50 Full cost per unit 27.00 49.50 An external supplier has offered to supply a product to the Finishing

41. ## physics (momentum)

A 3 kg ball with an initial velocity = (4.00i + 3.00j)m/s collides with a wall and rebound with a final velocity = (-4.00i + 3.00j)m/s. The ball is in contact with the wall for delta t =2.00E-3s. (specify answers with unit vectors) a) what is the change in

Is "a bark of rust" a metaphor? I need to analyze the poem New Hampshire by Donald Hall and the line I'm having difficulty with is: "a bark of rust grows on the tree of a gas pump;" Thank you! yes, that could be a metaphor

43. ## biology holly leaf miner

can anyone please explain the term regulating mortality factor (regarding the holly leaf miner )and how understanding of this can lead to successful biological control of pests in agriculture and horticulture

44. ## astronomy

1. The radius of the Sun is 7 X 10^5 kilometers. Use powers of ten to show that the Sun's radius is about 100 times the Earth's radius. 2. Given that an astronomical unit is 1.5 X 10^8 kilometers and a light-year is about 10^13 kilometers, how many AU are

45. ## tan x = 1/2

Can someone tell me what the radian value is for this number and how they got it? Thanks On a graph plot the point A(2,1) Let C(2,0) be the point on the x-axis x is the angle AOB and tan x = 1/2 Since angle x is not one of the special angles, you will have

46. ## Algebra

How do I complete the square: 4x^2+3y^2+8x-6y-5=0 Also, is this a ellipse or a circle? first of all arrange the terms that appear to 'belong' together 4x^2 + 8x + 3y^2 - 6y = 5 factor out the 4 from the x terms and the 3 from the y terms 4(x^2 + 2x + ??) +

I asked this question yesterday and didn't really get much help with it. Can someone please help? An appropriate way to make connections to thematic units involves: 1. cross-cultural activities 2. developing interpersonal activities 3. the use of an

48. ## biology

is anyone able to help i have to write 700 words on the subject of the metabolism of green plant cells in relation to energy exchange processes any guidance would be very much appreciated http://en.wikipedia.org/wiki/Photosynthesis

49. ## Math 209

When simplifying a rational fraction, why do you need to factor the numerator and the denominator? If there is a common factor in both the numerator and denominator, that factor will cancel, thus simplifying the fraction. e.g. 15/18 = (3*5)/3*6)

50. ## math

finding the worth of the unit fraction will help you to solve each problem below. 1. if 4/5 of a number is 16, what is 1/5 of the number? 4/5 * x= 16 divide both sides by 4 1/5 x = 4 One fifth of the number is ...four.

51. ## Geomentry

What is the converse of the theorem statement: If a line divides two sides of a triangle proportionally, then it is parallel to the third side. see the other post.

52. ## Finance

Yoshika Landscaping is contemplating purchasing a new ditch-digging machine that promises savings of \$5,600 per year for 10 years. The machine costs \$21,970, and no salvage value is expected. The company's cost of capital is 12%. You have been asked to

53. ## math

70 divided by 7 = your answer is 10. 10 10 duh!!

54. ## Chemistry

Using a structural formula wrute out the equation for the hydrolysis of lactose - please help! see my posting on April 2, 2007 at 5:12am

55. ## Algebra: Functions

Write a rule that describes the relationship between minutes and second. Write a rule that describes the relationship between minutes and second. Find the rule for each function table. x y 2 -2 0 0 -2 2 -4 4 it looks like the x is the opposite of the y. So

56. ## math

Can anyone help me? It says,"Shelly sat in front of mariah. Diane sat in back of mariah. Natalie sat on either the left or right corner. Sarah sat between rows 2 and 6. Lily sat two feet fron Mariah and four feet from Bethany. But the teacher told Mariah

57. ## algebra

I need help.. If the train contained 42 gallons of ice cream at the tempurature of thrity two degrees and the train ran at 12 miles per hour and the train starts from Los Angeles an was making a stop at Phillipines. If the country of Phillipines demand the

58. ## Maths , Science , English ?

Hi I;d like to have some advice as my checkpoint exams are coming and are on the 1st of May until the 3rd.. I'm in year 9 and I'd like you to give me any advice on revising ( maths , Science and English ) and some websites other than bbc if you can thanx

59. ## Biology

can anyone please explain the term regulating mortality factor (regarding the holly leaf miner )and how understanding of this can lead to successful biological control of pests in agriculture and horticulture hi are you doing s103 im finding this whole

60. ## geography

vehicles equipped with a high horsepower motor use more fuel than most motors. What does the federal governments impose on these vehicles? Other than the regular taxes on gasoline, the U.S. government doesn't impose additional penalties. The penalty seems

61. ## Help wih this question

For my assignment I need to answer what is thornton wilder getting at in the play The skin of your teeth when he says future is easy to predict its the past that's difficult to interpret. I couldnt' understand the play real well and don't know where to

62. ## Chemistry

Standard entropies for substances are defined at a pressure of exactly 1 bar or exactly 1 atm in different books. For gases, this correction factor would be..... in J/molK? Answer is in format 0.xxxxxx I'm a little confused... I'd appreciate any help. 1

63. ## algebra!!!!

HELP ME I DON'T GET IT What do you need help with?

64. ## journalism

Hi I'm supposed to write a story on the school's CSTs scores and eve though I have tried, I haven't been able to find a website with school's scores. If you could find it, I would be very pleased. Thank you in advance Thank you for using the Jiskha

65. ## help

Tell wheher each represents a funtion. Explain minutes= 60 times hours A math function doing something to a value like adding, subtracting, multiplying or dividing, as you have in your formula: minutes = 60 * hours. I hope this helps. Thanks for asking.

66. ## maths

lan completed part of a race and had 2000m left to run.if he had completed 3/5 of the race,what is the total distance he had to run? Let the total distance be x m since he completed 3/5 of the race, he still has 2/5 of the race to run, but this is supposed

67. ## Geomentry

What is the converse of the theorem statement: The segment connecting the midpoints of two sides of a triangle is parallel to the third side and is half as long.

what poetic term is "a quarrel of vines"? Thank you! That could be a metaphor Thank you so much for your help!

69. ## Launguage Arts

In launguage we are talking about the six traits. We talked about it last week. I cant really remember them. Will somebody please refresh my memory. Here are several linked websites/webpages you can use: http://www.webenglishteacher.com/6traits.html At

70. ## Algebra:Functions

Tell wheher each represents a funtion. Explain minutes= 60 times hours Yes, minutes is a function of time in hours. M= 608Time

71. ## Algebra

What is the square root of 13/4 + the square root of 26/4 ? 1.8027756 and 2.5495098