# Questions Asked onFebruary 19, 2007

1. ## math

Derivatives are usually not taught in 5th grade. That is what your question is about: Rates of change. Complete the following statements with the correct words Note: Correct spelling is important. If s(t) is a distance (or height or position) function,

2. ## Math (Calculus 121)

Consider the following function. f(x) = 7x3 + x2 - 0.08x + 12 Find the two points on the graph at which the tangent line is horizontal. Give your values correct to 2 decimal places. ( , ) (point with smaller x value) ( , ) (point with larger x value)

3. ## PHYSICS helppppp

A 0.2 kilogram baseball is thrown vertically downwards towards to the same horizontal floor. The baseball possesses an initial velocity of 30 meters per second. The height is 10.00m. (A) Calculate the POTENTIAL GRAVITATIONAL ENERGY and KINETIC ENERGY of

4. ## Math (Statistic)

Considered the sampling distribution of a sample mean obtained by random sampling from an infinite population. This population has a distribution that is highly skewed toward the larger values. a) How is the mean of the sampling distribution related to the

5. ## English: clauses

we have to to identify the dependent clause in this sentance and then tell wether the clause is an adverb, adjective, or noun clause. "Who knows what the future will bring?" In this sentance i know where the dependent clause starts but other than that i'm

6. ## science

What is the speed of an 800-kg car whose KE is 250 kJ? Use the formula KE = (1/2) M V^2 Rearrange it to solve for V. You'll need to take a square root along the way.

7. ## english - idea on how to conclude a paragraph?

My introductory sentence is this: My least favourite musical performer is none other than the princess of pop herself, Britney Spears, otherwise affectionately known as Brit Brit in some blogging communities. I talk about some of her 'wild antics' in the

8. ## rf value of lycopene

Is the the rf value of lycopene and with what solvent can you use as a mobile phase on a TLC? I don't know the answer here but I looked on the Internet and found something that may get you started. I found the Rf value for lycopene to be between 0.4 and

9. ## chem

PLEEEZE help name the type of reaction K + MgBr -> Not enough information is provided. And not magnesium bromide is MgBr2. Is this a solution phase or exactly how is the K metal added to the MgBr2? As DrBob has indicated, not all of the information has

10. ## Bus law

Alex was on a coast-to-coast trip by automobile. While passing through Ohio, Alex had a flat tire. It was fixed by Sam’s Turnpike Service Station, and later, while Alex was driving in Indiana, the tire came off and Alex was injured. Alex was hospitalized

11. ## Calculus II/III

A. Find the integral of the following function. Integral of (x√(x+1)) dx. B. Set up and evaluate the integral of (2√x) for the area of the surface generated by revolving the curve about the x-axis from 4 to 9. For part B of our question , the surface

12. ## physics

A gasoline engine runs with 28 percent efficiency. It expels 3.60x10^4 J of heat in each cycle. a. Find the heat absorbed in one cycle. 128,571.4????? b. Find the work output in one cycle.

13. ## science

A crane whose motor has a power input of 5.0 kW lifts a 120-kg load of bricks through a height of 30m in 90s. what is the efficiency of the crane, which is the ratio between its output power and its input power.

14. ## Biology

Which materials produce during the light reactions of photosynthesis are essential to the dark reactions? Light Reactions (Occurs in Grana) The purpose of the light reactions is to change light energy into chemical energy of ATP and NADPH. a) Require light

15. ## science

the acceleration of gravity on the surface of Mars is m/s squared. if an astronaut in a space suit can jump upward 20cm on the earth's surface, how high could he jump on the surface of Mars? You need to provide a number for the acceleration of gravity on

16. ## Chemistry

What is the valency of selenium in hydrogen selenide? Consider what selenium's group is in the periodic table. There is oxygen and sulfur, right? Selenium will the same as those. The all have the same basic formula with hydrogen. What's that very common

17. ## physics

Air is being compressed in a cylinder with a volume of 0.025 m^3 under a constant pressure of 3.0*10^5 Pa and the volume of the air in the cylinder is reduced to 0.020 m^3. a. By how much is the volume of the air reduced? b. How much work is done in the

18. ## Stressed syllables

Here is a list of words now can someone help me find the stressed syllables: 1. diff(icult) 2. (imag)ine 3. (fam)iliar 4. relative 5. compan(ions) 6. (won)derful 7. impat(ience) 8. (coun)tryside 9. for(gott)en 10. univ(erse) 11. un(iver)sal 12. (acc)ident

19. ## Science

Thank you! Why is there a lunar eclipse only twice a year and not once a month? Thanks for the help. On the night of May 15/16 we will be able to see a total lunar eclipse. Lunar eclipses can only happen when the Moon is full and it passes behind the Earth

20. ## science

How long will it take a 1000-kg car with a power output of 20 kW to go from 10m/s to 20 m/s? Ignoring friction, the change in kinetic energy has to equal Power*time

21. ## math

what is 4,000 in roman numerals MV (the V has to have a bar over it)... now answer my HARD question under Lia =) But isn't MV 1,005??

22. ## analogies

i need to no if these analogies are like part to hole, function cause to effect and stuf like that (adequate:excellent) Here are some websites that can help you: http://www.google.com/search?hl=en&q=analogies After you've had a chance to read through some

23. ## physics

Why does water freezing not violate the second law of thermodynamics? (Hint: Think in terms of a system) The entropy of the water decreases when it freezes and goes into a more ordered crystaline state. However, heat is released to the environment in the

24. ## Chemistry

What is the empirical formula for aluminium selenide? What is the common oxidation state of aluminum? Combine that information with the valency for selenium that you came up with in the previous question to come up with the formula for aluminum selenide.

25. ## history

What are whe 3 general areas where the was was fought in the Revolutionary War? This site will give you some good ideas. However, I would say the major battles were in the northern US, on the sea and to a lesser extent in the southern US.

26. ## Physics

The emf induced across the wing-tips of a flying aircraft is of the order of several millivolts. Can this value be obtained using a sensitive millivoltmeter connected across the wing-tips? Explain your answer. Not if connections are actually made to the

27. ## drugs

Help! An inhalant is not a stimulant or a depressant. So... what is it then?????? Puh-leaze help me! My grade this term counts on it. What kind of inhalant? We inhale many things -- dust, illegal drugs, legal asthma medications, pollen, etc. Please clarify

28. ## unscramble

please unscramble these letters: egrvwneoir Thank you for using the Jiskha Homework Help Forum. First of all, is it English? Next, are there any clues? What vocabulary are you studying? Often, if you have anagrams, they have to do with the textbook and/or

29. ## Algebra

How do I solve this? 2 {2/3 } / 4/5 / 1/3 {4/9} / 4/4 / 1/3 How do I cross multily the numbers? Is the (2/3) supposed to be squared? Is the (4/5)/(1/3) in a denominator below (2/3) ? You need to use more parentheses or brackets to clarify the order of

30. ## Chemistry

Can you give me an example of a compound that can make Ba3(PO4)2 even more insoluble than it already is (and can you tell me why, just for my own understanding)? You use the common ion effect which is just an extension of the Le Chatelier's Principle. The

31. ## Chemistry

Can you explain the process for solving this problem (this one is more complicated than the example in our book): A solution contains both I^- and Cl^-, each at a concentration of 3.0x10^-2M. What concentration of Pb^+2 is required to precipitate the

32. ## Chemistry

Could anyone tell me what the structure of this polymer is ( I need to draw it), I also need to identify three monomer units, CH2 = CH - CH - OH ( CH3 Thanks

33. ## English

what does it mean when someone said? how is Mike,Is he behaving himself? It means that Mike sometimes does not behave as well as might be expected. The person asking wants to know if Mike has been being good.

34. ## science

How do tthe air sacs of birds help make the body lighter? air in the bones lighten the wholww skeleton: http://www.backyardnature.net/birdbone.htm But the 9 breathing air sacs do not really lighten the bird except to possibly allow smaller lungs:

35. ## Physics

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 27.2 ° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 53.7 kg, and the coefficient of

36. ## science

How much work is needed to raise a 110-kg load of bricks 12m above the ground to a building under construction? According to the law of conservation of energy, the work required equals the change in potential emergy. To get the increase in potential

37. ## science

Which of these energies might correspond to the KE of a person riding a bicycle on a road? 10 J; 1 kJ; 100kJ KE is 1/2 mv^2. Take your mass (weight in lbs/2.2), divide by two, take a typical speed say 10mi/hr or 6.6km/hr or 5m/s, square it, and do the

38. ## mayflower pictures

CAn i plz have a picture or pictures of the mayflower? Whenever you are hunting for pictures, here's an easy way: 1. Go to http://www.google.com 2. Click on the word Images above the search box. The screen will adjust to an images search page. 3. Enter

39. ## history

annotative bibliography for sunlink and worldbook online http://wwwold.ccc.commnet.edu/mla/ Hold your cursor over the words CITING SOURCES in the left column and then click on Electronic Sources/Internet. Many examples will show up. You will get two

40. ## Dr Bob 222

I love you Dr Bob, you are great. I didn't realise how much it was getting me down. Don't like to give up on something, my text books don't make it very easy to follow through a problem. Understand it perfectly now, I feel so much better now. Thank you

41. ## science

the potential energy of a golf ball in a hole is negative with respect to the ground. Under what circumstances(if any) is the ball's kinetic energy negative? Its rest energy? The kinetic energy of the ball is zero when it isnt moving, whether it is ion the

42. ## Chemistry

What is a balanced equation for the reaction of aluminium selenide with water? Assume that aluminum hydroxide and hydrogen selenide are being formed. Then work out the balance.

43. ## math

how many sides must a polygon have A polygon must have at least 3 sides.

44. ## chemistry

the diagram below shows a structural formulae of 3 cabon compounds labelled 1 2 and 3 and the eaction between compounds 1 and 2. The equation for this reaction is incomplete only the reactants are shown, the missing products being indicatedby a? :o ch2

45. ## math

how long will it take to earn \$787.50 on \$5000 at 5 1/4%(percent) what is the rate it is compounded? annually, semi-annually, monthly, what? dat information is not given aren't you supposed to be using the interest rate formula? if so, then u have two

46. ## Math (Calculus 121)

The derivative tells you the slope at any point. df/dx = 8 x^3 - 12 x When x = 3, the slope is m = 8*27 - 36 = 180 and the equation of the tangent line is (y - 228) = 180*(x - 3) y = 180 x - 540 + 228 = 180 x - 312 wow, that was absolutely correct (i just

Consider the following function. f(x)= x^2 - sqrt(x) Find the equation of the line tangent at the point (1, 0). the answer would be 6, duh

48. ## chemistry

If someone could figure this problem out and tell me how to do it, i would really appreciate the help! Bryson needs .003 mg of a cholesterol-lowering drug per pound per day. The drug should be taken 3 times a day. If capsules contain .010 mg of the drug,

49. ## science

what, if anything, happens to the speed of a fighter plane when it fires a cannon at an enemy plane in front of it?

50. ## ethnics

Trends in immigration will continue to shape the face of the United States. What will this face look like in the year 2050? http://www.google.com/search?hl=en&q=trends+immigration There are many promising articles in this collection to help you. Please

51. ## math

ok. i am becoming home schooled on the computer, and i have no idea how to do my math problems... examples 3/12 + 3/4n what do i do with the n? 9/(4xa) - 3/4

52. ## % Recovery

How do you calculate percent recovery? I have this info: Weight of sample used: 0.198g Actual weight of sample: 0.325g Other info needed? What you have posted is confusing. What do you mean by "actual weight of sample?" Is that different than the weight of

53. ## Health

Does anyone know a site where I can find good slang terms for cocaine? I have a project on cocaine due Wednesday and I need to memorize all of the slang terms. Go to google and look up slang drug terms. Take the link for the pride website and go to the

54. ## Math

in the multiplication: 39P * Q3 =32951 P and Q each represent a single digit. what is the value of P+Q? I may have missed something here, BUT IF the digit is 9, note that 39*9*3*9=9477 which is far short of 32951. And 9 is the largest single digit we have.

55. ## Product curves

If the short run total product curve is a linear function of the variable input over some range of values. Describe the shape of the marginal product and average product functions. I am guessing that the marginal product is constant, which a horizonal

57. ## Sandra

2/7 divided by 6 I know to invert the fraction, then what? Please help! 2/7 divided by 6/1 = 2/7 multiplied by 1/6 Multiply and then reduce. http://mathforum.org/library/drmath/sets/select/dm_divide_fract.html =)

58. ## ELEMENTARY AND INTERMEDIATE ALGERBRA

x=0 and y=4 in the second problem X+y=13 22x + 36y=356 -3x + 2y =8 3x + 2y=8 y=4 hold, on i'm trying to find x x=2 & y=1 on the last one :)

59. ## algebra help

2) subtract the two equations to erase the y value (since 2y-2y=0) and solve for x, then add them to erase the x value (since -3x+3x=0) and solve for y. ur x values should be -8.5 and 7.5 respectively. i don't know how to do #1 step by srep the problems 1)

60. ## HELP

Dangling Modifiers If your baby does not like cold apple juice, it should be heated. Your answer: 1. Dangling Modifiers When they are fresh, eating oranges can often keep away the cold virus. Your answer: 2. Predication Our plans for tomorrow should begin

61. ## Math ttriangles

how would I find the hieght of a isocscles triangle if the base was 20 and the area was 240? To find the height of an isocsceles triangle With the area at 240 and the base at 20 aren't you supposed to divide 240 by 20? If so what is your answer? The area

62. ## science

Can you direct me to a site(s) which can help with college chemistry and statistics? Here are a couple of good chemistry sites that pretty well cover the waterfront. I don't know any stat sites but if you will repost with the subject line of "math" I'm

63. ## DrBob222 physics

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 27.2 ° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 53.7 kg, and the coefficient of

64. ## Biology

In the inner mitchondrial membrane, hydrogen ions... A)are pumped in olny one direction. B)are pumped in both directions C)leak across in only one direction D)leak across in both directions http://cellbio.utmb.edu/cellbio/mitochondria_1.htm

65. ## math

ok i get the whole FOIL thing but what if there's negative numbers? and what do you if there's an addition and a subtraction? ex. (mn-m^2)(-n+m) you treat negative numbers just like positive numbers (for instance; (6x+3)(2x-2), 1st-6x*2x=12x^2, outer-

66. ## Chemistry

What are the heath and safety hazards associated with H202 and H2SO4? H2SO4 is a highly corrosive acid to metals, non-metals, and humans. H2O2, in low concentrations (3% to about 17%) is available commercially. It is used as a disinfectant and to dissolve

67. ## math

A widget factory has fixed costs of 35 billion dollars and variable costs of 781 million dollars per widget. The revenue (in \$ billions) from selling x number of widgets is given by the following for x between 0 and 60. R(x) = 0.11 (60x - x2) What is the

68. ## Question

How will you apply the knowledge you have learned about effective business communication and cultural diversity to your current/future job and college courses? Thank you for using the Jiskha Homework Help Forum, BUT . . . . . We certainly don't know the

69. ## science/the human body

explain why a person will die if their heart stops beating for a few minutes People die when their heart stops beating because it has stopped pumping blood throughout the body. The heart is the pump that distributes the blood through the entire body, also

70. ## algebra

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic

71. ## Health (drugs)

I know that inhalants aren't either a stimulant or a depressant. So what are they? Thank you for using the Jiskha Homework Help Forum. Here is a site from the government explaining inhalants: http://www.nida.nih.gov/Infofacts/Inhalants.html thanks, but I

72. ## Bus law

Why is the United State a “common law country”? We're a common law country because we follow precedents established over hundreds of years in Britain and the U.S. Common law is followed except when statutory law opposes a specific practice. Check this

73. ## Strategic

which comes first, the development of the long-term objectives, or the evaluation of organizational strengths and weaknesses? Please explain your choice. It seems to me that you'd need to know the long-term objectives before you evaluate the organization's

74. ## grammar

Is the following sentence correct? In the late 1990s, the popularity of MTV’s The Real World sparked increasingly interest in this concept. The Real World

75. ## English Lit- Judith Wright

Does anyone have any information/websites on the poem 'Mirror at the Fun Fair' by Australian poet Judith Wright? Or info on any of her poems. Thanks!

76. ## math

can you direct me to some sites for helping with college statistics? thanks

77. ## math

whats the next # in this sequence: 52, 28, 33, 63, 73, 23, 56 i really need help so if anyone can answer it would be great. sorry this is a tuff one but i think its 26 thanks i wasn't sure either

78. ## computers

how do u erase the history from you computer for good places you've been on the internet? yea but i mean in general also for the internet, there is a green arrow going around a clock on a buttonbeside the favourites button. click it. now go to the today

79. ## court system law

Can someone help me what are good websites to find this information in. Thanks.....or any hits help will be awsome. Considering issues facing the Juvenile court system today, and appraise the efficacy of juvenile justice policy in our modern society. What

80. ## Refraction

Which tool does NOT have lenses to Refract? A. Camera B. Mirror C. Telescope D. Binoculars Some telescopes have no lenses. Look at a mirror. Do you see any lesnses there?

81. ## English- citing in mla format

i am writing a paper on a novel and i used quotes from the book. when i cite do i need to put (author name page number) every time, or should i do it that way once and then just put (page number)? thanks http://wwwold.ccc.commnet.edu/mla/ Be sure to go

82. ## Math

In 5th grade terms Divide the total time by 8. That's the time per trip. is the answer 40 A bus route crosses the city 8 times in 12 hrs. On average, about how many minutes does it take the bus to cross the city? 12 hours/ 8 = 7200 minutes/8 Do the

83. ## Math

I need help in making homework easier dealing with prime numbers is there any help you can give me to try

84. ## Of mice and men

Would you say Steinbeck uses indirect or direct characterization of the characters? I think it's direct. For example he says, "The first man was small and quick, dark of face, with restless eyes and sharp features," (Steinbeck 2). I think you're right.

85. ## math (simple interest)

Susan collected \$1.20 interest after 6 months. What was the amount of her deposit if the bank pays 6% interest? Solve this equation: .06x = \$2.40 the answer is 40

86. ## Math HELP!!!

x2 + x + -3.75 = 0 Please... I'm horrible at algebra. x=7.5 and x=-8.5 THANK YOU SO MUCH

87. ## Com 120

I looking for the comma splice http://grammar.ccc.commnet.edu/grammar/runons.htm#splice Here's an explanation of what a comma splice is and some examples, as well as how to fix them. Please re-post if you have specific questions. =)

88. ## math

I need 2 know how 2 find the measure of a regular haxagon!! HELP ME PLEASE!! This site explains how to find the area of a regular hexagon. http://www.mathreference.com/geo,hex.html

89. ## math

subtract how do you solve for y- form? i don't get this!!!!