Questions Asked on
January 10, 2007

  1. chemistry

    A saturated solution of potassium chlorate is formed from 100 grams of water. if the saturated solution is cooled from 80 degrees celsius to 50 degrees celsius, how many grams of precipate are formed? Do you have a table that lists the solubility at 80 and

  2. chemistry

    How much does 1 molecule of bromine weigh? I know the atomic mass for bromine is 79.90 g but I do not know how to use it to figure out the weight of the molecule. The given answer is 2.654x10^-22 but I do not know how to get there. First, the molecule of

  3. physics

    Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen)

  4. physics

    A block is moving down an incline a distance of 5 m form point A to point B by a force F that is parallel to the incline and has magnitude 2 N. The magnitude of the frictional force acting on the block is 10 N. If the kinetic energy of the block increases

  5. Factoring Polynomials

    Ok, this is pretty long, so bear with me. The problem says: The diagram (not shown here, sorry) shows a cube of metal with a cylinder cut out of it. The formula for the volume of a cylinder is V=pi*r^2*h, where r is the radius and h is the height. The

  6. Definition of biological influences

    I need help with the definition of biological influences. I can do the rest of the assignment but if someone can help me with the understanding of biological influences it will help me finish the rest of my assignment. Thank you very much. Think on these:

  7. math

    solve 2x^2+3x+8=0 and express the solutions in a+bi form. Let's use the quadratic formula to solve for x and express those solutions in a+bi form. x = [-b + or - sqrt(b^2 - 4ac)]/2a Note: sqrt = square root. a = 2, b = 3, and c = 8 from your problem.

  8. Factoring Polynomials (need HELP!!!)

    Ok, this is pretty long, so bear with me. The problem says: The diagram (not shown here, sorry) shows a cube of metal with a cylinder cut out of it. The formula for the volume of a cylinder is V=pi*r^2*h, where r is the radius and h is the height. The

  9. trigonometry

    Hint: The total of angle measurements inside any pentagon is the same. Hint: Look up the mathematical definition of an arithmetic sequence. IF THE MEASURES OF THE ANGLES OF A PENTAGON FORM AN ARITHMETIC SEQUENCE, WHAT ARE THE GREATEST AND LEAST MEASURES

  10. PHYSICS HELP

    If the external world does work on the system, the quantity of work is negative. Is negative right or is it positive? If you are writing the system equations, the work done by external forces will be a + number, indicating an increase of energy to the

  11. Chemistry

    Can you show me how to do this? 2KClO3 -> 2KCl + 3O2 If 5.0(g) of KClO3 is decomposed , what volume of O2 is produced at STP? 5 g KClO3 = ?? mols. ??mols KClO3 will produce how many mols O2? Use the coefficients in the equation to do this conversion. 1 mol

  12. Math(radicals or square roots)

    i need a explanation for this equation: 5 radical(square root) 108 over 25 the 5 is in front of the square rooted number and it is a fraction PlEASE HELP :( That is not an equation. It is a number. It sounds like you are describing the fifth root of 108,

  13. pre-calc

    determine if the following lines are parallel, perpendicular or neither. Explain your reasoning. -2x+3y=3 2x+3y=3 Rewrite them in y = mx + b form to get the slopes, m. The lines are parallel of the slopes are the same. They are perpendicular if the product

  14. help me...plz its not hard for u but for me it is

    How do you write a Bibliography? Can you just give me a example... THANKS!!! This will give you an example and an explanation of each item. http://www.aresearchguide.com/11guide.html These days, bibliographies are also known as "works cited" pages.

  15. math

    3vt+v(5v-7t 5v^2 - 7vt + 3vt combine the last two terms.. 5v^2-10vt factor out a 5v 5v ( you do the rest).

  16. algebra

    Find the zeros of the function. f(x) = 2x^2-2x-1 Use the quadratic equation x= (2 +- sqrt (4+8))/4 x = 1/2 +- 1/2 sqrt 3 check that. the answer would be negative 96 I think respond back if not right

  17. Unit Rates

    Find each unit rate. - 20 mi in 5h - 78 mi on 3 gal Please and Thank-you I need HELP!!!!!!!!!! same answer as I gave to Janie 400 miles in 5 hours

  18. Science/Chemistry

    How many electrons can occupy a single molecular orbital? and Alumimum is a group 3A metal, Which ion does A1 typically form? I'm thinking Al3+ Your first question depends on the molecule involved and how it is bonded. Hybrid molecular orbits can be

  19. physics

    During a rockslide, a 520kg rock slides from rest down a hillside that is 500m long and 300m high. The coefficient of kinetic energy between the rock and the hill surface is .25. a) If the GPE energy U of the rock –Earth system is zero at the bottom of

  20. algebra

    Factor completely with respect to the integers. I just need to see if I can simplify or factor the answers I got even further. 1. x^3 + 64 Answer: (x+4)(x^2-4x+16) Can this simplify any? 2. 8x^3 - 64 Answer 8(x-2)(x^2+2x+4) 3. x^-2x^2+4x-8 Answer:

  21. PHYSICS HELP

    If the external world does work on the system, the energy of the system increases , decreases or remains the same? I think it increases. Am I correct? The system increases. Yes, you are correct.

  22. PHYSICS HELP

    Thank you, Bob. If the system does work on the external world, the energy of the system remains the same. Is this true or false? False. THe total energy in the system has decreased.

  23. Physics

    An object moves in a circular path with constant speed. Is the object's velocity constant? Is its acceleration constant? Please explain. From what I've learned in my 8th grade science class, when velocity changes is when the direction or speed changes. So

  24. Biology (Botany)

    What part of a dicotyledon seed would test positive for starch? What is an endosperm?

  25. Algerbra

    regular dinner = 2 tacos & 3 enchailada for 2.39 special dinner = 3 tacos & 4 enchiladas for 4.23 what is the average price for a taco & enchilada? Let t be tacos and e be enchiladas. A regular dinner would be represented as: 2t + 3e = 2.39 and a special

  26. language arts

    In figurative language,what is a glowing of red coals. Glowing of red coals suggests warmth and redness.

  27. Math

    I need to graph solution sets for linear inequalities. How do I do this? I've done these kind already send me an example of one and i'll explain its probably similar to the ones i did.

  28. geography

    does anyone know anything about thomas cromwell. i need information. please help me http://en.wikipedia.org/wiki/Thomas_Cromwell

  29. role of central nervous system

    I am seeking a website which will help me with what the role of the nervous system in sensing, processing, and responding during stressful eposides in your life such as rages or shock. I need it to possibly help me understand how the brain responds during

  30. chemistry

    why do organic reactions occur more slowly than inorganic reactions (those that contain ionic bonds)? In inorganic reactions the ions merely need to get close enough to attract between + and - charges. Organic compounds are not ionic (some are polar);

  31. trigonometry

    suppose a manufacterer of transistors believes that, on the average, one defective transistor occurs in every 100 transistors. a. find the probability that a batch of 20 transistors has 2 defectives. b. find the probability that a batch of 20 transistors

  32. religion , edit

    How do contemporary Buddhist practices reflect the foundations of the religion? Contemporary BUddhist practices reflect the foundations of the religion by meditation which is like praying to their gods inorder to keep away the illnesses and evil. It helps

  33. problem solving

    in 1979, the death rate,D, from acute myocardial infarction for people between the ages of 65 and 74 years was 577 per 100,000 people. In 1996, the rate was 262 deaths per 100,000 people. Round to one decimal place in part a. write sentences for your

  34. snomobiles

    who invented snowmobiles? A man named O.C. Johnson made the first snomobile in 1909. According to this site, Carl Eliason invented the snowmobile. http://patentpending.blogs.com/patent_pending_blog/2005/11/the_invention_o.html This site gives the credit to

  35. trigonometry

    Expanding the trinomial, (x+y+z)^n, gives terms X^rY^sZ^t where r+s+t=n and with a coeficient of n! over r!s!t!. a. use this pattern to expand (x+y+z)^3. b. find the sum of the coeficients in the expression of (x+y+z)^n. (LET x=y=z=1.)

  36. Sequences and Series

    PreCal. What is the difference between the equations (n(n+1))/2, and n/2(ti+tn)?? Under what conditions would you use them? Thanks much!!!

  37. social studies

    how was this phrase (our greatest glory is not in never falling,but in riseing every time we fall)in confucianism meant to the chinese This phrase means that it's not important if you fail. What's important is that you rise above your failure and succeed

  38. PHYSICS HELP

    Draw an arrow in the box that shows the direction of the force. Please help. I want to be sure. W > 0 W = 0 W < 0 ___ ____ ____ ___ ____ ____ d-> d-> d->

  39. chemistry

    what are the general reactants and products in a fermentation reaction? thanks http://www.crocodile-clips.com/absorb/AC4/sample/LR1507.html

  40. Unit Rates

    Find each unit rate. - 20 mi in 5 h - 78 mi on 3 gal Please and thank-you Convert the first pair of number to miles per minute, using division. Convert the second pair of numbers to miles per gallon, using division. Convert the first pair of number to

  41. Math grade 7

    could someone please help me with this two part question? I can not understand it. I need to hand in my homework by tomorrow. Thanks A thousandths grid is completely coloured in when three different decimals are shown. One decimal is double one of the

  42. chemistry

    if 37.9 liters of NO at .993atm and 146 degrees celcius are decomposed by the reaction 2NO-->N2+O2 how many grams of nitrogen will be formed... could you show mw step bu step how to do this ? thanks....i have finals tommorrow.... i need

  43. math

    Express y as a function of x. C is a positive number. 3 ln y= 1/2ln (2x+1) - 1/3ln (x+4) + ln C ln y = (1/6)ln (2x+1) -(1/9)ln (x+4) + (1/3) ln C y = e^ln y = e^[(1/6)ln (2x+1) -(1/9)ln (x+4) + (1/3) ln C] = C^(1/3)* (2x+1)^(1/6) /(x+4)^(1/9)

  44. PHYSICS HELP

    I am having a real problem with this question. Through the process of doing work, energy can move between the external world and the system as the result of forces or work. I say it's forces, but someone else says it's work because only work and energy can

  45. PHYSICS HELP

    If the external world does work on the system, the quantity of work is negative or positive? I said it was positive and Bob Pursley said I was right, but a Physics student said that it is negative. Please help if you can..

  46. math

    Expess y as a function of x. C is a positive number. 1n y= 3x + ln C Make both sides of the equation powers of e.

  47. Ethics

    should united states government policy favor certain kinds of immigrants? What do you think? Should we favor certain nationalities as we have throughout most of our history? Should we favor skilled and educated workers? Should we favor spouses and children

  48. polynomials

    (3+7x)-(16x2+15x2) (3+1x)-(12x+16+0+18x2) Q4: (15+13x2+14x2)+(13x+18x) Q5: (2x2+1+15x2+7+3)+(0x+17x) Q6: (18x+3)+(17x2+1x2+9+8+0x) Q7: (6x + 14) - (9x + 5) Q8: (14x2 + 13x + 12) - (7x2 + 20x + 4) Q9: Subtract -10x2 + 16x - 15 from -6x2 + 19x + 19 Q10: From

  49. science

    What is the second planet closest to the sun? http://en.wikipedia.org/wiki/Venus

  50. physics

    A 30g bullet with a horizontal velocity of 500m/s comes to a stop 12 cm within a solid wall. a) what is the change in its mechanical energy? b) What is the magnitude of the average force from the wall stopping it? a) what would I use of the equation? Can

  51. math

    Can you help me with this: Paul's budget for food is $10 more than 1/3 of his total budget. If $100 was alloted for food, what was the total budget? Ana if you have to change the 1/3 to a decimal, can you help me with that too? Thank you!! 100-10= 1/3 B I

  52. MATH

    I need a definition for this constant rate of change when graphing in mathematics and for Positive and Negative correlation and also what the pattern is in this a) 1000, 100, 10, 1 I know the second question. 1000 is 10^3, 100 is 10^2, 10 is 10^1, and 1 is

  53. math

    I need a definition for this constant rate of change when graphing in mathematics and for Positive and Negative correlation and also what the pattern is in this a) 1000, 100, 10, 1 please I need help for the second question it is multiplying times 10

  54. Science

    I need to now in order which of these are big in order from biggest to smallest: Moon, Whirlpool Galaxy, Hubble Deep Feild Galaxies, Hubble Space Telescope, Pleiades Star, Cluster, Saturn Sun Then the distance from closest earth to the farthest in order:

  55. Chemistry

    what term matches this description? two or more valid electron dot formulas that can be written for the same molecule. what is resonance? thanks.. what about the weakest attractions that exist between molecule. i had resonance for that induced

  56. T.V Prod

    Anyone know where i can find a short story(treatment). Like a one page movie story about anything Are you looking for a short story? If so -- this is one of my favorites, "The Most Dangerous Game," by Richard Connell.

  57. polynomials

    (3+7x)-(16x2+15x2) (3+1x)-(12x+16+0+18x2) Q4: (15+13x2+14x2)+(13x+18x) Q5: (2x2+1+15x2+7+3)+(0x+17x) Q6: (18x+3)+(17x2+1x2+9+8+0x) Q7: (6x + 14) - (9x + 5) Q8: (14x2 + 13x + 12) - (7x2 + 20x + 4) Q9: Subtract -10x2 + 16x - 15 from -6x2 + 19x + 19 Q10: From

  58. food

    does anyone know what a manufacturing specification is for food coursework?? im sooo stuck and it has to be in tomorrow =[ please help me :D x Thank you for using the Jiskha Homework Help Forum. Since I'm not sure exactly what you are looking for, I hope

  59. buildings

    What was the first U.S. government building constructed? Your question is somewhat ambiguous. Are you asking about the first building used by the U.S. government? That's probably Carpenter's Hall in Philadelphia where the First Continental Congress met.

  60. Chemistry

    Hi Can anyone help me determine the valency of selenium in hydrogen selenide... how do you work this out ??? Thank you .. Freddo .. H2Se is the formula for hydrogen selenide. The valence of H is +1, there are two of them for a total charge of +2. For the

  61. PHYSICS HELP

    Please check to see if these statements are right. Through the process of doing work, energy can move between the external world and the system as the result of forces. I believe this is true. Please verify. Yes, true.

  62. Please correct sentence

    Richard III supposedly had the young princes murdered. Found out what really happened to them. First part is a sentence. Second part is a fragment. How will you correct the fragment? http://grammar.ccc.commnet.edu/grammar/fragments.htm =) look in the

  63. "My Antonia"

    A new critc reading "My Antonia" would find many components worth consideration, like Cather's lush descriptions of the prarie and vivid portrayls of living with only the barest essential. Wite a formal paragraph to this question- Analyze the importance of

  64. Chemistry

    what term macthes this description? what about the weakest attractions that exist between molecule answered below last one A covalent bond formed between two different atoms in which the bonding electrons are shared unequally a polar covalent bond.

  65. math

    I need a definition for this constant rate of change when graphing in mathematics and for Positive and Negative correlation and also what the pattern is in this a) 1000, 100, 10, 1 I'll give you a definition for positive and negative correlation.

  66. Math

    find an equation for a ploynomial function with zeros, negative 8, negative 3 over 4, 1 over 5, and 2. hey it is 53h8kkds f (x) = x(x+8)(x+ 3/4)(x- 1/5)(x-2) will be zero when any one of the factors is zero. Multiply the factors to get the polynomial form.

  67. math

    factor 243p^5+q^15 Since you have powers of p and q by themselves in separate terms, it cannot be factored. Are you sure you copied the question correctly?

  68. math

    express as a function. c is a positive number ln y= 1n x + 1n C Make both sides of the equation an exponent of e. Remember that x^a * x^b = x^(a+b)

  69. Science

    I need a disgram on how electricty works. I need the whole process on how its created and how its genertaed ect. Suppose I know nothing on electricity. But I don't want a dry cell electricty, I want a diagram on hydor, of coal, or something like that.

  70. geo:(

    name at least three products that are used to manufacture automobiles Look at the car your family drives. It's made of steel, aluminum, plastic, synthetic fabric, among many other products.

  71. had a few ideas, need some more.

    this is the question we have for my software application class... To explain why commonality is important, pcmag reminds us how the 2000 Presidential election was affected by apparently confusing punch cards in Florida. In that scenario, the interaction of

  72. genetics

    How do you determine genotypes? The only way to determine genotypes is to know the parentage.

  73. science

    what is gases and how does they behave http://www.onelook.com/?w=GAS&ls=a

  74. polynomials

    (15+11+6x2+1)-(13x2+2) Combine like terms. I will be happy to critique your work on this.