Questions Asked on
May 12, 2007

  1. advanced algebra quartic

    leaning ladders- a nasty quartic Two ladders leaning in opposite directionsbetween two walls.Each ladder touching the base of the opposite wall Ladders are 40 ft and 60 ft respt. cross at hy of 10 ft , h, what is the distance tween walls w ?

    asked by fredd
  2. Electrochem

    A baby's spoon with an area of 6.25 cm^2 is plated with silver from AgNO3 using a current of 2.00 A for two hours and 25 minutes. a) If the current efficiency is 82.0%, how many grams of silver are plated? b) What is the thickness of the silver plate

    asked by Keith
  3. Chemistry

    When we mix NaOH and H2SO4 we get the equation OH-(aq) + H+(aq) --> H2O(l) and if we mix H2CO3 and NaOH we get the equation 2OH-(aq) + H2CO3 --> 2H2O(l) + CO3-2(aq) Why aren't the two equations the same? ie only one mol of NaOH reacts in the first equation

    asked by Fiona
  4. math

    describe (in words) two different sets of people containing you as a member. describe (in words) the complement of each set. describe what people are not in either the orininal set or the complement set You might think of various categories that include

    asked by Liam
  5. Calculus HELP plz

    Find the area of the surface obtained by rotating the curve y=sqrt(4x) from x=0 to x=1 about the -axis. about the x-axis. surface area= ⌠ 2pi * f(x)*sqrt[1 + (f'(x))^2] dx from a to b ⌡ it's been 45 years since I used that formula. I ended up with the

    asked by jimmy
  6. math

    The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. Time t (hours) Depth d (m) 0 3.0 1 3.3 2 4.2 3 5.6 4 7.2 5 8.2 6 9.0 7 8.9 8 8.1 9 7.3 10 5.6 11 4.3 12 3.5 13 3.1 Use the regression

    asked by grant
  7. French

    I have been on for 3 hours and no one is posting or anything. Can anyone take a stab at answering the last question I posted? Please??????????????? Thank you for using the Jiskha Homework Help Forum. I don't know what time it is where you are but I just

    asked by brie
  8. History

    I'm doing a project on Medieval nights- please help! How did chivalry reflect medieval culture especially religon? Its due on Monday and i still have HEAPS to do!!!!! Please help me! You mean Medieval knights, right? If you spell it wrong during a search

    asked by Alice
  9. Math

    I can't to get this problem. Perform the indicated operation 11 -6/7 -7 Can someone help me??? It's easier to perform the 11-7 first. 11-7 is 4. Now, take 4 of something. Cut one of them up into 7 pieces and take away 6 of the 7 pieces. What are you left

    asked by Norma
  10. Science

    Tereestrial plants, Aquatic Plants & Insectivorous Plants? Thank you for using the Jiskha Homework Help Forum. Here are some sites on your subject: 1. http://www.honda-e.com/ 2. http://www.uky.edu/Ag/Horticulture/pls220/aquatics/aquatics.html 3.

    asked by M Sandhya
  11. math

    I never got the fractions, Determine the maximum and minimum values of the following set of numbers. 2,-8,1/2,-5/3,9/4,-7,-73/9 I think the answer is -73/9 and 1/2 am I right if not can anyone tell me what I am doing wrong?? change them all to have a

    asked by Norma
  12. math

    Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not change. C. A particle

    asked by clara
  13. mathematics -logs

    which three statements are true? a) if x= -10^4 then log 10 = -4 b)if x= 2^8 then log 2x = 8 c) log2 2= 4 d) if x= 3 then log10 3=x e) log 10 256-2log 10 a/log 10 b f)log 10 (a-b)= log 10 a/log 10 b g) the gradient of the graph of y= 2x^x at x= 2 is 2e^e

    asked by malcolm
  14. math

    which three statements are true? a) if x= -10^4 then log 10 = -4 b)if x= 2^8 then log 2x = 8 c) log2 2= 4 d) if x= 3 then log10 3=x e) log 10 256-2log 10 a/log 10 b f)log 10 (a-b)= log 10 a/log 10 b g) the gradient of the graph of y= 2x^x at x= 2 is 2e^e

    asked by claire philips
  15. math help

    Posted by grant on Saturday, May 12, 2007 at 9:20am. The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. time t (hours) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 and the in the next column

    asked by grant
  16. Electrochemistry

    I have an electrochem based question. I'm trying to solve for E* based on a chart in my book. I know the equation for solving this is E*= E*ox + E*red. The chart in my book gives a list of reactions and a E*red value. My teacher told us that the greater,

    asked by Keith
  17. Science

    Why is it impossible to have an Arctic Circumpolar Current? http://www.whoi.edu/science/PO/arcticgroup/projects/proshjohnson-two-regimes.pdf

    asked by Erica
  18. norwalk

    historical events of daoism IV History of Daoism Print this section Daoism gradually changed from the philosophy of a small number of sages to a widespread popular religion followed by numerous individual believers and by many groups of monks and lay

    asked by jacqueline
  19. CHEMISTRY

    Calculate Kp at 500 deg C for the reaction- 4No2+6H2O 4NH3+5O2. The value for Kc at 500 deg C is equal to 0.456. Kc = KpRT-delta n where delta n = ngas products - ngas reactants

    asked by Delli
  20. math

    The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. time t (hours) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 and the in the next column corresponding to the figures above is depth d (m) 3.0 3.3

    asked by grant
  21. maths

    which three statements are true? a) if x= -10^4 then log 10 = -4 b)if x= 2^8 then log 2x = 8 c) log2 2= 4 d) if x= 3 then log10 3=x e) log 10 256-2log 10 a/log 10 b f)log 10 (a-b)= log 10 a/log 10 b g) the gradient of the graph of y= 2x^x at x= 2 is 2e^e

    asked by claire philips
  22. maths

    how do i solve the following equation? 4 - x = 2 - (3 - 2x) remove ( ) by distributing - sign 4-x=2-3+2x then add -4 to both sides to get -x = -4 + 2 -3 + 2x then -x = -5 +2x then add 2x to both sides x=-5

    asked by sarah
  23. maths

    Sixty people were asked how many films they had seen in the past year. The results are shown in table 1. Table 1: number of films seen by a group of people during the past year No of film seen(x)0 1 2 3 4 5 6 7 8 N0 of people(f) 23 12 9 6 3 4 2 0 1 What

    asked by roger
  24. math

    consider the conditional statment if you brush your teeth regularly then you won't get cavities. under what circumstances will the sttement be false The statement will be false if other conditions exist that cause cavities. The statement will also be false

    asked by Liam
  25. Punctuating Sentences

    Without a doubt, cramming for the test. This is not a complete sentence. The phrase "cramming for the test" is either a gerund or praticipial phrase, but there's no subject or verb here. When you decide how you'll make this into a complete sentence, please

    asked by Mae
  26. math

    could somebody tell me the answer or order of operations to this calculation. 3cos(2 x 2) thanks. I assume you meant 3cos(2x²) pick your x square it multiply it by 2 take its cosine multiply by 3 press the = sign on your calculator after each step to

    asked by r. giggs
  27. Math

    I can't to get this problem. Perform the indicated operation 11 -6/7 -7 Can someone help me???

    asked by Norma
  28. Science

    Aquatic Birds- their habitats & habits Thank you for using the Jiskha Homework Help Forum. Here are some sites for you: 1. http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=15093476&dopt=Abstract 2. (Broken Link Removed) 3.

    asked by M Sandhya
  29. Math

    Information about 3 Indian & 3 foreign mathematicians. You'll find information about dozens of mathematicians -- from India and other places in the world -- in these sites. http://www-groups.dcs.st-and.ac.uk/~history/BirthplaceMaps/Countries/India.html

    asked by M Sandhya
  30. math

    The amounts of oil pumped from an oil well in each of the years 2001 to 2004 formed a geometric progression with common ratio 0.9. The amount pumped in 2001 was 100000 barrels. Calculate in which year the amount pumped will fall below 5000. The amounts of

    asked by Rashida
  31. maths

    Compass bearings of a carin are taken from two points A and B, 400 m apart, along a strsight north-south path, A being due north of B. the bearings of the carin from A and B are 110 degrees and 80 degrees, respectively. choose the two options which give

    asked by claire philips
  32. math

    which 3 are correct a) if x= -10^4 then log10 x = -4 b)if x= 2^8 then log 2x = 8 c) log2 2= 4 d) if x= 3 then log10 3=x e) log 10 256-2log 10 16=0 f)log 10 (a-b)= log 10 a/log 10 b g) the gradient of the graph of y= 2e^x at x= 2 is 2e^2 h) the gradient of

    asked by grant
  33. astronomy

    so basically Pluto is a planet? basically , yes. There is some controversy about this. Since this is not my area of expertise, I searched Google under the key words "Pluto planet" to get these possible sources:

    asked by singh
  34. Biology

    Frogs Question: What is it called when reproductive adults maintain larval characteristics? Thank you. http://en.wikipedia.org/wiki/Paedomorphosis

    asked by Gerri
  35. psychology

    List some common neurotransmitters and describe their effect on behavior The first two sites have a list of neurotransmitters and the effects. The other sites explain effects in detail. http://web.indstate.edu/thcme/mwking/nerves.html

    asked by Anonymous
  36. maths

    The ‘body mass index’ is used to find the body weight that is appropriate for a person’s height. It is calculated using the formula. I = W (I = W divided by H squared) H 2 Where I is the body mass, W is the person’s weight in kg, and H is the

    asked by katie
  37. Emission Spectrum of hydrogen ...CHEM

    Can someone please explain the emissiom spectrum of hydrogen? THose lines represent the energy released by the electron when going from one orbital (energy level) to a lower orbital. The difference of energy levels exactly corresponds to the energy in the

    asked by Pet
  38. Chemistry

    When asked to name all of the ions and molecules present in a 0.1 mol L-1 solution of CH3COOH, why are there OH- ions present if the equation is CH3COOH(aq) + H2O(l) --> CH3COO-(aq) + H3O+(aq) ? The water ionizes in such a manner that the product of the

    asked by Fiona
  39. French

    Could someone please explain to me verb inversion? I never get confused in French, but this verb inversion stuff is really confusing. It just seems so pointless! Please help, Thanks, brie Thank you for using the Jiskha Homework Help Forum. If you are doing

    asked by brie