Newest questions and responses by Mischa
  1. Chemistry

    Consider this reaction: 3 K2CO3 (aq) + 2 CrCl3 (aq) -> Cr2(CO3)3 (s) + 6 KCl (aq) If 1.2 moles of CrCl3 react, how many moles of K2CO3 will react with it? A. 0.80 mol K2CO3 B. 1.2 mol K2CO3 C. 1.8 mol K2CO3 D. 2.4 mol K2CO3 I'm not sure where to even

    asked on April 11, 2015
  2. c++

    how do you pass only part of an Array through a function? I thought it was something like function(Array, 5); but it's not working...

    asked on April 2, 2009
  3. diffeq

    how do i find the bifurcation for this: d^x/dt^2 = -.3 x - (x - 1)/((x - 1)^2 + a^2)^(3/2) - (x + 1)/((x + 1)^2 + a^2)^(3/2) we've tried using mathematica but it just runs forever...

    asked on March 25, 2009
  4. diffeq

    Let P(t) represent the population of a non-native species introduced to a new area for the purposes of harvesting. Suppose we intially introduce P0 = 100 indicidcuals and suppose the population grows exponentially with growth-rate coefficient k=2 if there

    asked on February 22, 2009
  5. diffeq

    Suppose a species of fish in a particular lake has a population that is modeled by the logistic population model with growth rate k, carrying capacity N, and time t measured in years. Suppose the growth-rate parameter k=.3 and the carrying capacity N=2500.

    asked on February 4, 2009
  6. chemistry

    suggest a mechanism for 2Fe(3+) + 3I- -> 2Fe(2+) + (I3)-

    asked on December 5, 2008
  7. physics

    a very light rigid rod with a length of .500m extends straight out from one end of a meterstick. the meterstick is suspended from a pivot at the far end of the rod and is set into oscillation. determine the period of oscillation (hint: use the

    asked on December 4, 2008
  8. physics

    A car moves with speed v on a horizontal circular track of radius R. The height of the car's center of mass is h, and the separation between the inner and outer wheels is d. The road is dry, and the car does not skid. Find the maximum speed the car can

    asked on November 20, 2008
  9. chem lab

    If a sample tube was smudged with a fingerprint when inserted into a spectrometer, what affect would this have on the value of A (absorbance) when you read it? explain.

    asked on November 13, 2008
  10. stats

    Consider an infinite population with 25% of the elements having the value 1, 25% the value 2, 25% the value 3, and 25% the value 4. If X is the value of a randomly selected item, then X is a discrete random variable whose possible values are 1, 2, 3, and

    asked on November 5, 2008
  11. physics

    A bicycle has wheels 67.3 cm in diameter and pedal cranks 17.5 cm long. The cyclist pedals at a steady cadence of 76.0 rev/min. The chain engages with a front sprocket 15.2 cm in diameter and a rear sprocket 7.00 cm in diameter. Calculate: a) the speed of

    asked on November 4, 2008
  12. chem

    The solubility product of Mg(OH)2 is 1.2 x 10^-11. What minimum OH- concentration must be attained (for example, by adding NaOH) to decrease the Mg concentration in a solution of Mg(NO3)2 to less than 1.0 x 10^-10 M (molar)?

    asked on November 1, 2008
  13. chem

    which is the least stable isomer of C4H8: methyl cyclopropane or cyclobutane and why?

    asked on October 24, 2008
  14. chemistry

    which is more stable: methyl cyclopropane or cyclobutane and why?

    asked on October 20, 2008
  15. chem

    The solubility of KNO3 is 155 g per 100 g of water at 75 degrees celcius and 38.0 g at 25 degrees celcius. What mass (in grams) of KNO3 will crystallize out of solution if exactly 100 g of its saturated solution at 75 degrees celcius is cooled to 25

    asked on October 15, 2008
  16. chem

    A hemoglobin molecule (molar mass =65000 g) can bind up to 4 oxygen molecules. In a certain experiment a .085-L solutoin containing 6.0 g of deoxyhemoglobin was reacted with excess of oxygen in a constant-pressure calorimeter of negligible heat capacity.

    asked on October 4, 2008
  17. chemistry

    The fuel value of hamburger is 3.6kcal/g. If a man eats 1 pound of hamburger for lunch and if none of the energy is stored in his body, estimate the amount of water that would have to be lost in perspiration to keep his body temperature constant. (the heat

    asked on October 4, 2008
  18. chemistry

    What hybrid orbitals are used by nitrogen atoms in the following specis: (a)NH3 (b)H2N-NH2 (c)NO3- I got sp^2 for (a), but I'm not sure about the other two.

    asked on September 25, 2008
  19. stats

    I have to do an observational study for an AP statistics course. Does anyone have any good ideas?

    asked on May 13, 2008
  20. quantum physics

    After a .800-nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.20 x 10^6 m/s. (a) What was the Compton Shift in the photon's wavelength? (b) Through what angle was the photon scattered? I got an answer for (a), but

    asked on May 7, 2008
  21. physics

    A construction worker uses a steep tape to measure the length of an aluminum support column. If the measured length is 18.700 m when the temperature is 21.2 degrees celcius, what is the measured length when the temperature rises to 29.4 degrees celcius. I

    asked on March 13, 2008
  22. statistics

    What is an example of two events that are neither disjoint nor independent? (I have no idea how that would even work)

    asked on February 26, 2008
  23. english

    is it underfunded or under funded?

    asked on February 23, 2008
  24. gov't

    Does anybody know a site that rates the education systems of countries? I know Britain's number one...

    asked on February 13, 2008
  25. physics

    What are examples of when friction can increase an objects Kinetic Energy?

    asked on February 13, 2008
  26. physics

    for a free throw in basketball,find an equation for the final angle to go into the hoop in terms of y and x to the hoop and the initial angle. I can't seem to get an equation with only those variables. I always get stuck with others like time and velocity.

    asked on February 3, 2008
  27. calc

    Find m and b so that y=mx+b is a solution to the differential equation dy/dx=1/2x+y-1

    asked on January 24, 2008
  28. Calc

    Find the velocity of a satellite orbiting above the equator of the earth in geosynchronous orbit (Period=24 hours) in km/hr. The earth's mass M=5.974x10^(24)kg and radius R=6,731 km. G=6.673x10^(-11) m^3/(kg*s^2) Use v=(G*M/R)^(1/2) I plugged everything in

    asked on January 17, 2008
  29. math/physics

    Help! I have no idea how to do this. The earth's orbit is nearly circular with a radius R=93x10^6 miles (the eccentricity is e=.017). Find the rate at which the earth's radial vector sweeps out area in units of ft^2/s. What is the magnitude of the vector

    asked on January 17, 2008
  30. works cited page

    I am doing a works cited page in MLA format. If I have two articles that are from the same website, just different places, do I document it as one source or two different ones?

    asked on December 2, 2007
  31. english

    I need to write 2 process essays. Any good ideas? I know there's so many things I can do, but it's hard to come up with a good one.

    asked on October 18, 2007
  32. French

    I am not sure about the ordering of the words. Are the following correct? Do you speak French? Vous parlez francaise? I speak a little French. Je parle francais comme ci comme ca. My mom speaks french too. Ma mere parle francais aussi.

    asked on September 24, 2007
  33. French

    Based on all the questions I've asked. I believe there are no mistakes in these sentences? -J'aime la musique japonaise. -J'ai un frere, il a vingt sept ans. -Elle a vingt ans. -Elle est jeune, elle est jolie. (Should I use jolie or belle?) -Elle aime la

    asked on September 22, 2007
  34. French

    When I say I have one brother and he is 27 years old, do I say J'ai un le fr¨¨re or J'ai un fr¨¨re Il a vingt sept ans.

    asked on September 20, 2007
  35. French

    I have to fill out this chart, I want to know did i do it correctly, thanks. Etre: Tu es Aimer: Tu aimes Habiter: tu habites s'appeler: tu s'appelles Parler: Tu parles

    asked on September 20, 2007
  36. French

    I know that for a male to say that he is french, we use francais, and for a female, we use francaise. But when a female says that she speaks french, do we use francaise as in Je parle francaise? And when a female says that she likes French music, do we use

    asked on September 18, 2007
  37. Graph constraints

    Suppose that there is a model with two constraints 1) 120x1+160x2

    asked on September 16, 2007
  38. Graphs

    Suppose there's a model with 2 constraints originally. Now that another constraint is added. Which of the following are possible: 1) feasible region shrinks 2) feasible region stays the same 3) feasible region expands and Which of the following are

    asked on September 15, 2007
  39. english

    I need a title for a narrative about my fear of snakes and the time one got loose in our classroom. Any witty ideas?

    asked on September 13, 2007
  40. history/poetry

    Can anyone help me interpret this poem/prayer? What does it reveal about Mesopotamian religious beliefs and practices? Thanks!! May the wrath of the heart of my god be pacified! May the god who is unknown to me be pacified! May the goddess who is unknown

    asked on September 4, 2007
  41. english

    I'm suppose to figure out what the leg is a metaphor for in the following story. I can't figure it out. Any suggestions?! Letter from Gaza by Ghassan Kanafani Dear Mustafa, I have now received your letter, in which you tell me that you've done everything

    asked on May 22, 2007
  42. calc- please help

    given x=2cos(t)+t*sin(t) and y=2sin(t)-t*cost(t), with t:[pi, 2pi] find all critical values. (4 answers)

    asked on May 20, 2007
  43. calc 2

    given x=2cos(t)+t*sin(t) and y=2sin(t)-t*cost(t), with t:[pi, 2pi] find all critical values. by finding dy/dx and setting it equal to zero, i only find one value, t=6.121, within that domain. that gives you x=.987. I'm suppose to get three other answers.

    asked on May 20, 2007
  44. calc

    let y=2x-8. What is the minimum value of the product xy? I'm not really sure how to do this... I tried taking x*(2x-8), and the min is 0. but then i wanted to see if it was the same when solving for x, and i got a min of -8. How do i do this problem?

    asked on May 1, 2007
  45. physics

    I need to find the centripetal acceleration of my clothes dryer. How would I go about doing it... Would the tangential speed just be 2pi*R*number of rotations/time, or how would I find that? Put a shoe in the dryer. Count the number of times the shoe

    asked on May 1, 2007
  46. calc/physics

    A force of 250 N is required to stretch a spring 5m from rest. Using Hooke's law, !@#$%^&x, how much work, in joules, is required to stretch the spring 7m from rest? The energy required scales with x^2. Multiply 250 J by (7/5)^2.

    asked on April 23, 2007
  47. physics

    An electron and a proton are each placed at rest in an external uniform electric field of magnitude 520 N/C. Calculate the speed of each particle after 48 ns. None of the equations I have seem to help me. What can I use to solve this problem? I figured it

    asked on April 12, 2007
  48. physics

    Three point charges, q1, q2, and q3, lie along the x-axis at x=0, x=3 cm, and x=5 cm, respectively. Calculate the magnitude and direction of the electric force on each of the three points when q1=+6.0 muC, q2=+1.5 muC, and q3=-2.0 muC. I would add the

    asked on April 11, 2007
  49. Calc AB

    What is the area of the region in the first quadrant enclosed by the graph of y=e^(x^2/4) and the line y=0.5? When I graphed the two functions they don't even connect so the answer would be infinity. What am I doing wrong> Integrate y=e^(x^2/4) from x=0 to

    asked on March 27, 2007
  50. Calc

    Does 1/ln(x+1) converge or diverge? I've tried the nth term test, limit comparison test, and integral test. All I get is inconclusive. The other tests I have (geometric series, p-series, telescoping series, alternating series, and root tests) don't apply.

    asked on March 22, 2007
  51. physics

    A bird perched on a swing the sits 8 cm below a bar has a mass of 52 g, and the base of the swing has a mass of 153 g. The swing and bird are originally at rest, and then the bird takes of horizontally at 2 m/s. How high will the base of the swing rise

    asked on March 20, 2007
  52. Calculus

    Boats A and B leave the same place at the same time. Boat A heads due North at 12 km/hr. Boat B heads due East at 18 km/hr. After 2.5 hours, how fast is the distance between the boats increasing? You are looking at a right-angled triangle, let S be the

    asked on March 1, 2007
  53. Calc

    The radius of a sphere is increasing at a rate proportional to its radius. If the radius is 4 initially, and the radius is 10 after two seconds, what will the radius be after three seconds? dR/dt = c R Integrating this differential equation gives you ln

    asked on March 1, 2007
  54. Math

    x/3=2 x=2*3 x=6 x/6=3 x=3*6 x=18 How would I get the missing number? ?/3 = 2 ?/6 = 3 What number divided by 3 will equal 2. Multiply 3 times two for the answer. Same for ?/6=3. what do u divide by to get 2 what u divide by to get 3

    asked on February 28, 2007
  55. Physics

    A worker pushes a 1500 N crate with a horizontal force of 345 N a distance of 24 m. Assume the coefficient of kinetic friction between the crate and the floor is .220. How much work is done by the floor on the crate? -M*g*(mu,k)*X Mg = 1500 N mu,k = 0.220

    asked on February 27, 2007
  56. Physics

    A student pulls on a rope attached to a box of books with a mass of 35.0 kg and moves the box up a ramp at 12 degrees with the horizontal. If the box starts from rest at the bottom of the ramp and is pulled at an angle 25.0 degrees with respect to the

    asked on February 24, 2007
  57. calculus

    The volume of a solid is given by V=pi x^2(lnx)^2. what is the approximate change in the volume when x is increased from 2.718 to 3.000? dv= PI 2x(lnx)^2 dx + Pix^2 *2lnx * 1/x reduce that. For x, use 2.718 dx= 3-2.718 check my thinking.

    asked on January 8, 2007
  1. Math

    A triangle can be both scalene and right angled

    posted on November 13, 2017
  2. english

    i don't believe that is correct ask mrs sue

    posted on April 4, 2016
  3. Chemistry

    Thank you very much! I over analyzed it and made the problem harder than it was. That makes complete sense. Thank you for your speedy reply!

    posted on April 11, 2015
  4. chemistry

    the rate law is R=k[Fe3+][I-]^2

    posted on December 5, 2008
  5. chem

    ever mind...i got it.

    posted on October 15, 2008
  6. physics

    never mind. i got it.

    posted on March 13, 2008
  7. Calculus

    that one's arcsin. factor it into: 4*integral(1/sqrt(16-(t^2+2t+1)))dt so, 4*integral(1/sqrt(4^2+(t+1)^2))dt divide everything in the sqrt by 4^2 and bring it out as 1/4, 4/4*integral(1/sqrt(1+((t+1)/4)^s))dt) now it's in arcsin form (remember u and du) so

    posted on February 13, 2008
  8. Physics

    use v^2=Vo^2 + 2*a*x

    posted on February 13, 2008
  9. Calculus

    Actually, it's arctan. 3/10*integral(1/((x-1)^2+1))dx =3/10arctan(x-1) + C

    posted on February 13, 2008
  10. Calculus

    try factoring the bottom and using the triangle rule

    posted on February 13, 2008
  11. Geometry

    The area of a trapezoid is H*(b1+b2)/2. 128=32*(5+x)/2 128=16(5+x) 8=5+x 8-5=x x=3 inches

    posted on January 17, 2008
  12. Geometry

    Complimentary angles add up to 90*. so 90-8=82 and 82/2 (b/c there's 2 x's) is 41. so the two angles are 41 and 49, the smaller one being 41*.

    posted on January 17, 2008
  13. Algebra II

    1st#=x-2 2nd#=x 1/2(x-2)+x=41 x-2+2x=82 3x=84 x=28

    posted on October 18, 2007
  14. French

    So actually the order of the words doesn't really matter in French?

    posted on September 24, 2007
  15. French for Mischa

    Is this sentence correct? She has 3 male cousins and 4 female cousins. Elle a trois cousins et quatre cousines.

    posted on September 23, 2007
  16. French for Mischa

    We didn't need a french name for class, but Miche sounds nice. And thanks for doing this, I really appreciate it.

    posted on September 23, 2007
  17. French for Mischa

    Personally, I really like the sound of the language. And I always wanted to go to France, maybe travel or even for work. I am just really interested in French culture. I would love to know some of your 75 good reasons to learn french.

    posted on September 22, 2007
  18. French

    Wow, that's amazing!

    posted on September 22, 2007
  19. French

    I figured I rather do the accents by hand. lol Yeah, I am pretty sure where the accent goes. I was just wondering, how many languages do you know? You seem to know quite a lot.

    posted on September 22, 2007
  20. French

    Thanks, actually i just start learning french two weeks ago. I have a question from before, you said that the adjective modifies the noun in number (singular/plural) and gender (masculine/feminine) and has nothing to do with the subject. -la musique goes

    posted on September 20, 2007
  21. French, for Mischa

    Thanks, SraJMcGin.

    posted on September 19, 2007
  22. French

    I have a PC and Windows

    posted on September 19, 2007
  23. Marketing

    no, i guess all kinds of pet food.

    posted on September 19, 2007
  24. French

    I remember that accent mark, I just don't know how to type it in. =) Thanks again.

    posted on September 18, 2007
  25. French

    And also, if a male says that he likes French music, so we also use francaise as in J'aime la musique francaise?

    posted on September 18, 2007
  26. French

    o...so there's nothing like le musique or le danse. I just have to remember the nouns, I get it now, thanks. And my textbook is called initial 1.

    posted on September 18, 2007
  27. French

    Thanks. I have another question. This sentence comes straight out of my textbook. Il aime la danse, la musique. Il is he, so why would it not be le danse, le musique?

    posted on September 18, 2007
  28. Algebra


    posted on September 16, 2007
  29. math

    What are you trying to do?

    posted on September 16, 2007
  30. pre-algebra

    a(a-c)=23 a-c=23/a c=a-23/a

    posted on September 13, 2007
  31. math

    (5x-20)(x+3) -(x^2-9)(x^2+9) Then are you sure the third one is written right? 18a^2b- is a to the 2b or is b something else

    posted on September 4, 2007