Questions Asked on
March 25, 2007

  1. Physics

    A wheel with rotational inertia I is mounted on a fixed, fricitonless axle. The angular speed w of the wheel is inccreased from zero to w_f in a time interval T. 1: What is the average net torque on the wheel during the time interval, T? a) w_f/T b)w_f/T^2

    asked by Tammy
  2. Physics

    A spring has a force constant of 100N/m and an unstretched lenght of .07 m. One end is attached to a post that is free to rotate in the center of a smooth table. The other end is attatched to a 1 kg disc moving in uniform circular motion on the table,

    asked by Tammy
  3. Physics

    When a block slides a certain distance down an incline the work done by gravity is 300 J. What is the work done by gravity if this block slides the same distance up the incline? a) 300 J b) zero c) -300 J d) It cannot be determined without knowing the

    asked by Tammy
  4. Physics

    An ideal massless spring is fixed to the wall at one end. A block of mass M attached to the other end of the spring oscillates with amplitude A on a frictionless, horizontal surface. The maximum speed of the block is V_m. The force constant of the spring

    asked by Tammy
  5. chemistry

    I need help with a,b,and c. I tried to balance it but im having a little trouble Ethane gas, C2H6, burns in air and produces carbon dioxide and water vapor. a)write a balanced equation for this reaction. I know this isnt balanced but is this what im

    asked by beth25
  6. Chem

    The only stable isotope of fluorine is fluorine-19. Predict possible modes of decay for fluorine-21, fluorine-18, and fluorine-17. Would it just be alpha-particle production, beta-particle production, gamma-ray production, and positron production for all

    asked by Steve
  7. Chem

    A bottle of win contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is .79 g/mL. Calculate the concentration of ethanol in wine as mass percent and molality. I calculated molality as 2.4 m/kg, but I'm stumped on the mass percent [although I'm

    asked by Jessica
  8. Physics

    A ball is tossed straight up from the surface of a small spherical asteroid with no atmosphere. The ball goes to a height ewual to the asteroid's radius and then falls straight down towardd the surface of the asteroid. What forces if any act on the ball

    asked by Tammy
  9. science

    what's the difference between inexhaustible resources and renewable resources. HELP charges come together (7 letters) attract renewable resources are those that can be "renewed" as in we use trees for the wood but we can replant trees and regrow wood to

    asked by Jay
  10. chemistry

    consider the reaction 2HgCl2 + C2O4-2 ---> 2Cl2-1 + 2CO2 + Hg2Cl2 The initial rate of this reaction was determined for several concentrations of HgCl2 and C2O4-2 and the following rate data was obtained. TRIAL (1) [HgCl2](M)= .105 [C2O4-2](M)= .15 RATE=

    asked by unknown
  11. Physics

    A target lies flat on the ground 3m from the side of a building which is 10m tall. A student rolls a ball off the horicontal roof of the building in the direction of the target. Air resistance is negligible. Te horizonal speed with which the ball must

    asked by Tammy
  12. Physics

    To streatch a certain nonlinear spring by an amount 2x requires a force F given by F=40x-6x^2 where F is in newtons and x is in meters. What is the change in potential energy when the spring is stretched 2 meters from its equilibrium position? a)16 J b)28

    asked by Tammy
  13. history

    In 1860 what concerns were brought about during Lincoln's Presidency? The attempt of the South to secede from the Union was the main convern. This erupted into the Civil War one year later, when Union forces were attacked at Fort Sumter, South Carolina.

    asked by Mack
  14. Chemistry

    From this equation, how many glocose does the human body consume ineach minute? If gram per mole is 180.16. The human body needs at least 0.0103 mole O2. Equation C6 H12 O6 + 6O2-->6CO2 +6HO2 How many glucose what? grams? moles? tons? Mext, the human body

    asked by Jerremy
  15. Finance-Need by tonight please help!!!!!!!!!!!!!!!

    Cost of Debt. Olympic Sports has two issues of debt outstanding. One is a 9 percent coupon bond with a face

    asked by Cherie Cruz
  16. Physics - KE/rotation

    In Figure 11-32 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will roll without slipping

    asked by COFFEE
  17. Math

    A license plate is to consist of two letters followed by three digits. How many different license plates are possible if the first letter must be a vowel, and repetition of letters is not permitted, but repetition of digits is permitted? The first position

    asked by Carlos
  18. Financial analysis-Need by tomorrow please!!!!!!!!

    If the risk-free rate is 6 percent and the expected rate of return on the market portfolio is 14 percent, is a security with a beta of 1.25 and an expected rate of return of 16 percent overpriced or underpriced?

    asked by Vanessa Belunek
  19. Physics - KE/Inertia

    The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm) consists of

    asked by COFFEE
  20. english

    "Talk is cheap until you hire a lawyer." Can someone please explain to me how this is an example of punch line? That is called "satire". Anyone can talk and talk all they want to, no cost! just energy and air is all that is required. BUT, when a lawyer is

    asked by Larry
  21. history

    What happens in the elections of 1824? Thank you for using the Jiskha Homework Help Forum. I would not say "what happens" but rather "what happened." Here are some links for you: 1. http://en.wikipedia.org/wiki/United_States_presidential_election,_1824 2.

    asked by Mack
  22. history

    What does this quote mean? Who does it refer to? and What kind of government does it refer to? Thank you for using the Jiskha Homework Help Forum. You need to type the quote so we may see it! Otherwise we can't help you. "A government responsive to the

    asked by Mack
  23. science

    Hi I have 2 questions I hope someone can help me :) 1)A pocket of gas is discovered in a deep drilling operation. The gas has a temperature of 480c and is at a pressure of 12.8 atm. What volume of gas is required to provide 18.0 L of gas at the surface

    asked by lindsay
  24. algebra help please

    A bus leaves a station at 1p.m. traveling west at an average rate of 44 mi/h.one hour later a second bus leaves the same station traveling east at a rate of 48mi/h. At what time will the two buses be 274 miles apart I know that I am suppose to use d=r*t

    asked by allen
  25. humanities...NEED BY TONIGHT!PLEASE!!!!!!!!!!!!!!!

    I need to know aboout christianity,judaism and islam THNX :) Christianity http://www.religioustolerance.org/christ.htm http://www.bbc.co.uk/religion/religions/christianity/ Judaism http://www.jewfaq.org/toc.htm

    asked by vahnna
  26. History

    waht were some of the problems of 1800s england? Here are some sites that may be of help: http://www.fordham.edu/halsall/mod/modsbook20.html http://www.lkwdpl.org/lhs/england/ http://www.spartacus.schoolnet.co.uk/IRchild.main.htm

    asked by Marie
  27. econ

    my mind is going blank here..can someone chime in and help: If a new breakthrough in manufacturing technology reduces the cost of producing cd players by half, what will happen to the demand for cd players? Thank you for using the Jiskha Homework Help

    asked by tk
  28. Chemistry

    Determine the concentration of each type of ion in O.100M solutions of each of the following compounds. a. KBr b. Rb2S c. CuCl2 d. Mg(NO3)2 If someone could just even explain what they are asking for and how to do the problem, I would greatly appreciate

    asked by Anonymous
  29. science

    charges go away from, each other (5 letter word) repel

    asked by memo
  30. math

    If you roll a die many times, what would you expect to be the relative frequency of rolling a number less than 6? A) 2 out of 3

    asked by Michael
  31. chemistry

    The experiment Water solubility, used three compounds Ethanol, Hexanol and Cyclohexene. Hexanol was unsoluble in water. suggest a solvent would dissolve this compound in water?

    asked by Hasina
  32. english/hamlet

    i'm writing an essay on Hamlet comparing and contrasting the characters of Hamlet and Horatio. One of my paragraphs talks about the differences in their balance of character; Hamlet is unbalanced and dies, while Horatio is the ideal, balanced character who

    asked by Jessica
  33. criminology

    how is criminal behavior explicable according to rational choice theory? It would be helpful if you phrased your questions in regular English and explained your terms. explicable ??? rational choice theory ??? ?? question pertains to the rational choice

    asked by kg
  34. algebra,help

    I need help with these problems can someone show me how to solve them step by step.If anyone has time i appreciate it. Problem #1 Geometry. The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 4 cm, what are the

    asked by jas20
  35. MATH!

    The ratio of two supplementary angles is 2:7. What is the measure of the smaller angle? Can anyone help me with this--i don't understand it. The angles add to 180, so 2x + 7x=180 solve for x, then the smaller angle is 2x Supplemental means adds to 180

    asked by megan
  36. Math

    A license plate is to consist of two letters followed by three digits. How many different license plates are possible if the first letter must be a vowel, and repetition of letters is not permitted, but repetition of digits is permitted? For the first

    asked by Carlos
  37. Romeo and Juliet

    Could you name some examples from West Side Story and Romeo and Juliet that are examples of these themes? Haste and lack of wise forthought bring about diaster The only way some people learn is through suffering Revengful acts are costly and often do

    asked by cher
  38. algebra

    I invest $14,000, part is 15% and part is 2% if the total interest at the end of the year is $1060, how much did I invest at 15% I think you mean that part (let'say x) earns 15% and the rest earns 2% Solve thes two equations simultaneously: x + y = 14,000

    asked by Tony
  39. history

    Overall who is to remain above politics, is George Washington able to do this? Yes, George Washington didn't believe in political parties and remained above politics. For more information, check this site.

    asked by Mack
  40. Chemistry

    From this equation, how many glocose does the human body consume ineach minute? If gram per mole is 180.16. The human body needs at least 0.0103 mole O2. Equation BELOW. I really need this answer tonight please. C6 H12 O6 + 6O2-->6CO2 +6HO2 questions below

    asked by Jerremy
  41. english

    Can somone please give me an example of slapstick or a website? Thank you for using the Jiskha Homework Help Forum. First of all, a definition: 1. http://en.wikipedia.org/wiki/Slapstick Now slapstick comedy in the 1920's: 2. http://slapstick.lbox.org/

    asked by Larry
  42. history

    Who was the first President to be impeached? Thank you for using the Jiskha Homework Help Forum and here is the link for that answer: http://thelongestlistofthelongeststuffatthelongestdomainnameatlonglast.com/first189.html

    asked by Mack
  43. science

    a circuit that is open and electricity does not flow (a 10 letter word) incomplete

    asked by memo
  44. science

    a dry cell or power source (7 letter word) battery?

    asked by memo
  45. math

    30.9L = ? kL 45meters= .045km

    asked by courtney
  46. science

    where the current takes an unintended path (12 letter word) short circuit

    asked by memo
  47. science

    circuit is closed and electricity flows (8 letter word) complete

    asked by memo
  48. science

    electrical flow (11 letters)

    asked by memo
  49. science

    two paths for the charges to follow (8 letters) parallel

    asked by memo
  50. chemistry check

    1)A pocket of gas is discovered in a deep drilling operation. The gas has a temperature of 480c and is at a pressure of 12.8 atm. What volume of gas is required to provide 18.0 L of gas at the surface where the conditions are 22 C and 1.00 atm? is this

    asked by lindsay
  51. math

    One card is selected at random from a standard 52-card deck of playing cards. Find the probability that the card selected is a red king. 1 out of 26, There are 2 red kings in 52 cards so it would be 2 / 52 and then you sipmlify to 1 / 26

    asked by Jennifer
  52. science

    flow of charges through the circuit (18 letters)

    asked by memo
  53. science

    circuit is open and electricity does not flow (10 letters)

    asked by memo
  54. science

    bddhsbkkhfdjkfnfnfgl gibberish (9 letters)

    asked by memo
  55. World History

    What are some modern examples of cultural blending in art? Consider music, literature, painting etc.. I can't find any info for this topic and I have to write a 1 page report. Possibly one of these artists would make a good topic: Frieda Kahlo

    asked by Andrea
  56. math b

    if x is a ositive integer, 4x to the one hafl power is equivalent to? It is equal to twice the square root of the postive integer.

    asked by dott
  57. psychology

    say a group of students are studying for a test tommorow how can language acculturation hinder or help their study session and subsequent testing experiences? Thank you for using the Jiskha Homework Help Forum. By understanding the culture it will be

    asked by Chrissy
  58. Algebra

    Wrtie an equation of a line passing through (6,10) and (6,-6 y= mx + b Put in the first set of points: 10=6m + b Do the same for the second point. Then, you have two equations, two unknowns. Solve by substitution.

    asked by Tony
  59. sociology

    what are some ways in which American society is stratified? Please tell us your thinking about this answer and we'll be glad to critque it. Think -- money, power, race, gender I searched Google under the key words "social stratification" to get these

    asked by Anonymous
  60. science

    Which of the following is NOT found in animal cells? a. cell wall b. cell membrane c. organisms d. prokaryotes I think the answer is cell wall, but I'm not sure. Cell walls are only found in plant cells as far as I know. yes, a

    asked by jose
  61. Business

    how are data and information used within the human services organizations to support organizational planning? How can you plan for anything without having any data/information on the topic? The same is true of any organization. You need to know what your

    asked by Anonymous
  62. hypotenuse

    Identify the hypotenuse of a trinangle by fiving its letter I have no idea what you mean by "fiving its letter". Only right angle triangles have a hypotenuse. It is the side opposite the right angle, and is the longest side.

    asked by patti help
  63. algebra

    solve by substitution 3x-y = -7 x+y = -9 Substitute 3x+7 for y in the second equation, and solve the resulting equation for x.

    asked by Tony
  64. Math help!

    Place the following set of numbers in ascending order. -2/11, 5/8, 1/8, -1/9, 4/9 Well start by putting the most negative number first. 5/8 is bigger than 4/9. And 4/9 is certainly bigger tnan 1/9. Give it a try and I'll tell you if you get it right -1/9,

    asked by carol
  65. math , help,algebra

    i am up to this point in my problem but i don't know what to do next with it can someone show me. Directions: Simplify by combining like terms x radical(18) minus 3radical(8x^2) these are the steps that i've done so far. = x radical (2*9) -3radical

    asked by jasmine20
  66. history

    What does this quote mean? "A President can never be heedless (or neglectful) with public opinion" Thank you for using the Jiskha Homework Help Forum again. "a President must listen to what the public says."

    asked by Mack
  67. Math

    At an annual flower show, 6 different entries are to be arranged in a row. a) How many different arrangements of the entries are possible? b) If the owners of the 1st, 2nd, and 3rd place entries will be awarded prizes of $100, $50, and $25 respectively,

    asked by Jennifer
  68. Biology

    The human gene for the production of lactose is on chromosome 2. The dna nucleotide sequence of a small part from the middle is 123456789 TACTCGGAA I haVeTO WRITe DOWN THE EQVIVALENT SEQUENCE FOR MRNA AND HENCE WORK out the sequence of amino acids coded in

    asked by Bex
  69. Math

    In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and also

    asked by mark
  70. math

    If a student is selected at random, find the probability a)

    asked by Carlos
  71. Math

    The table below shows the number of tests taken by 30 randomly selected college sophomores Number of tests taken

    asked by Carlos
  72. Science

    Why is an extra day added to February every four years? It is nice to have the calendar year the same as the Earth's orbit around the Sun. It takes 365 1/4 days to go around the sun...so, each four years, we add a day to correct the calendar. Thanks Bob!

    asked by joey v
  73. economics

    True or False 1.Total output may continue to rise even though the marginal physical product (MPP) is decreasing Think about it, then take a shot. Hint: while MPP is decreasing, can it sign still be positive?

    asked by Kayla
  74. Water solubility chemistry

    What solvent that would dissolve Ethanol in water? You mean selectively dissolve the ethanol out of the water? Ethanol is soluble in water, at least last night when I had wine, it was dissolved. I don't know of anything that selectively absorbes ethanol

    asked by Hasina
  75. Physics

    The position of a toy locomotive mobing on a straight track along the x-axis is given the equation x=t^3-6t^2 +9t where x is in metters and t is in seconds. The net force on the locomotive is equal to zero when t is eqaul to a) zero b)2 s c)3 s d)4s e)5s

    asked by Tammy
  76. math

    If you roll a die many times, what would you expect to be the relative frequency of rolling a number less than 6? A) 2 out of 3

    asked by Michael
  77. Physics

    The velocity of a projectile at launch has a horizontal component v_h and a vertical component V_V. Air resistence is negligible. When the projectile is at the hightest point of its trajectory, which of the following show the vertical and horizontal

    asked by Tammy
  78. Algerba 1

    What is the square root of 125? 5 * squareroot5 how do u sigh up

    asked by Sherwood
  79. Math Help Please

    Solve and graph(using words)the inequalities.Then describe the graphs using words. Example:x>5andx

    asked by margie
  80. MATH

    How can you factor x^4 +1? If you go to the imaginary plane, it factors to (x^2 + i)(x^2-i) I need to factor by difference of squares. How can I do this?

    asked by Mike
  81. math

    can someone help me ? If you roll a die many times, what would you expect to be the relative frequency of rolling a number less than 6? A) 2 out of 3

    asked by Carlos
  82. Algebra

    The diameter of a circular pizza pan is 16 inches. What is the area, to the nearest tenth, of the pan? pi*r2 = area r = diameter/2 201.1 in. squared looks good to me.

    asked by La La Laquandra
  83. science

    Why don't perfect convection currents reach the North Pole from the equator? Land masses and other currents interfere.

    asked by beth
  84. science

    For the following crystals, explain how their melting points are related to the bonding forces and the crystal structure. a)Copper,Cu b)Water,H20 c)Sodium chloride,NaCl d)Diamond,C (Broken Link Removed)

    asked by lauren
  85. Spanish

    Yo he encontrado y he oído de muchas personas inspiradores en mi vida. Sin embargo, nadie me ha inspirado más en mi vida que mi padre. oops that's not all of it...i'll post below I have met and heard of many inspirational people in my life. However, no

    asked by JYD
  86. Algebra

    how would f(x)=-2+-3 look like on a graph I assume you made a typo, and you meant to type f(x)=-2x+(-3) or f(x)=-2x-3 that would be a straight line with a y-intercept of -3 and a slope of -2

    asked by Tony
  87. Geography.

    Think of yourself as a newspaper reporter at the site of an earthquake. You are reporting the damage. Describe in three or four sentences the kinds of destruction you observe. Plz help. Thanks. This site reports on the recent Japan earthquake.

    asked by Cindy
  88. Math

    ) In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and

    asked by Andres
  89. law

    what does this mean? It takes a village to raise a child What impact does this have on juvenile justice system? http://en.wikipedia.org/wiki/It_Takes_A_Village You can find more references if you Google "it takes a village" (including the quotation marks).

    asked by kln20
  90. Biology

    A mutation of c to t in position 3 and another of G to A in position 7 results in the production of a different sequence of ammino acids work out the new sequence and suggest why it might change the function of the new protein I get the sequence of

    asked by Bex
  91. Math

    At a fair run by a local charity organization, it costs 50 cents to try one’s luck in drawing an ace from a deck of 52 playing cards. What is the expected profit per customer, if they pay $4 if and only if a person draws an ace? I answered the identical

    asked by carl
  92. Math

    An artist entered two paintings (Lighthouse and Old Cathedral) in a show. He feels that the probabilities are, 0.15, 0.18, and 0.11, respectively, that he will sell the Lighthouse, the Old Cathedral, or both. What is the probability that he will sell

    asked by Michael
  93. math

    The table below shows the number of tests taken by 30 randomly selected college sophomores Number of tests taken

    asked by Carlos
  94. Accounting

    Your friend has just come home from their job at a hamburger shop feeling really good because their boss said that they worked so well they were a real asset to the company. Using the definition of an “asset” explain whether your friend would meet the

    asked by Jayde
  95. dev psych

    Can anyone guide me in coming up w/ a current developmental psychology topic? I'm thinking of the topic "designer babies"...I'm not sure this will be a proper topic. The teacher's assignment was general in nature. Thanks in advance.

    asked by jules
  96. chemistry

    What does the pH value for the tartaric acid solution suggest happens on dossolving a solid like cyclohexene? This must have something to do with an experiment you conducted or that you are geting ready to conduct. But you haven't told us enough to know

    asked by Hasina
  97. math

    During the last hour, a telemarketer dialed 20 numbers and reached 4 busy signals, 3 answering machines, and 13 people. Use this information to determine the empirical probability that the next call will be answered in person. it is 13/20, unless he dares

    asked by Carlos
  98. Math

    On a credit card, minimum monthly payments are often about 2% of the balance. If no interest were charged, how long would it take to pay off a loan when payments are 2% of the balance? With no minimum, almost infinite time. Lets get to when he owes ten

    asked by Shane
  99. sciencie

    hey i have a question what are the two requirements of mater and can matter exist at 0 kelvin yes, matter exists at 0 K, it's just really cold.

    asked by josh
  100. Advertising

    what do you think the advantages and disadvantages are to commision system of payment over the fee or incentive system? I need to compare the two of them.

    asked by Cher
  101. sciencie

    hey i have a question what are the two requirements of mater and can matter exist at 0 kelvin Didn't I answer this before? What do you mean by requirements? like what does it need like mass volume like what does it need like mass volume like what does it

    asked by josh
  102. science

    why do skin cells need protection from ultraviolet radiation? please could someone help me. http://www.ccohs.ca/oshanswers/diseases/skin_cancer.html

    asked by sam
  103. UofP

    Forcasting Payments If firm pays it's bill with 30 day delay, what fraction of it's purchases will be paid for in the current quarter? In following quarter? What is it's payment delay is 60 day. 30 day 1/2, current all 60 day 1/3

    asked by Patty
  104. English

    could someone please explain to me what idealism is? i think i know but i just need clarification. i've already looked it up several times but have gotten different answers. thanks! Thank you for using the Jiskha Homework Help Forum. Here is what the

    asked by Marie
  105. chemistry

    Reaction with Felings solution,if adding 2-butanol to potassium dichromate, in this experiment what spiecfic organic product would be form and structure.

    asked by Hasina
  106. Chem

    i do not understand this question please will someome help me! 'The ion that makes solutions acidic is... H+ or NH4+ or NO3- or 02- or OH- Most acids contain, or produce, H^+, hydrogen ions. More technically, the hydronium ion.

    asked by sam
  107. Math

    Can some one help me integrate (x^2 / (x^2 + x^4)) dx? Factor first: x^2+x^4= x^2(x^2+1) That will reduce with the numberator to INT (x^2+1)^-1 dx

    asked by Mike
  108. Calculus

    How can you factor x^4 +1? I need to factor by difference of squares. How can I do this? change it to x^4 - (sqrt(-1))^2 or x^4 - i^2

    asked by Mike
  109. Math

    A jar contains 5 yellow marbles, 16 green marbles, and 8 black marbles. If one marble is selected at random, what is the probability that it is not green? 13 chances out of 16 (5/29*4/28)+(5/29*8/28)+(8/29*5/28)+(8/29*7/28)=39/203

    asked by Carlos
  110. math

    1000 tickets for prizes are sold for $2 each. Seven prizes will be awarded – one for $400, one for $200, and five for $50. Steven purchases one of the tickets. a) Find the expected value b) Find the fair price of the ticket. The expected value= 950/2000

    asked by Mario