Questions Asked on
April 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

    asked by Karla
  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?

    asked by Liza
  3. 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

    asked by linds
  4. 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

    asked by Mack
  5. economics

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

    asked by Kayla
  6. 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

    asked by Emily
  7. Physics please check

    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.

    asked by Mary
  8. 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

    asked by Mary
  9. 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

    asked by Paul
  10. 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

    asked by Megan
  11. 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

    asked by Ari
  12. 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

    asked by Sunny
  13. 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

    asked by Anonymous
  14. 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

    asked by Emily
  15. 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

    asked by jasmine20
  16. 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.

    asked by Mack
  17. 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

    asked by bobpursley
  18. 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

    asked by Mary
  19. 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

    asked by Morgan
  20. 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

    asked by Lina
  21. 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

    asked by Roger
  22. 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

    asked by Misty
  23. 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

    asked by Kristine
  24. 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

    asked by Mary
  25. 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

    asked by Jackie
  26. 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

    asked by TOMMY
  27. 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

    asked by Bryan
  28. 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

    asked by A24
  29. 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.

    asked by jack
  30. 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.

    asked by Vicky
  31. 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

    asked by christine
  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

    asked by Kellie
  33. 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

    asked by christine
  34. 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

    asked by pamela
  35. 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.

    asked by paris
  36. 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:

    asked by Nicole
  37. 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

    asked by Amanda
  38. 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:

    asked by Em
  39. 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

    asked by Jay
  40. 7th Grade Poetry

    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

    asked by Kyle
  41. 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.

    asked by Jackie
  42. 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

    asked by Amy
  43. 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

    asked by casey
  44. Biology

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

    asked by Hailey
  45. 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)

    asked by Jennifer
  46. 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!

    asked by Z
  47. 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.

    asked by Mack
  48. 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

    asked by Buddy
  49. 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

    asked by ANANOMOUS
  50. 7th Grade Poetry

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

    asked by Kyle
  51. 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

    asked by Jennifer
  52. 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

    asked by Amy L.
  53. 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

    asked by Bex
  54. Thematic units-question--Please Help!!

    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

    asked by Desiree
  55. 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

    asked by Bex
  56. 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

    asked by Claudia
  57. math

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

    asked by haley
  58. 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.

    asked by cassie
  59. 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

    asked by Desmond
  60. explicit formula

    Is the n-1 an exponent in the formula gn=(r)n-1 Yes, an exponent.

    asked by Anonymous
  61. 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

    asked by John
  62. 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

    asked by Desmond
  63. Algebra:Functions

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

    asked by Amanda
  64. 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.

    asked by sharon
  65. 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

    asked by shiva
  66. algebra!!!!

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

    asked by LUPITA
  67. 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 "

    asked by Jennifer
  68. 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

    asked by marie
  69. Geomentry

    HHHHHHHHHHHHHHHHHHHHHHEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    asked by Mack
  70. 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

    asked by andrea
  71. 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

    asked by tyler
  72. Algebra

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

    asked by Blake
  73. 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 + ??) +

    asked by Jordan