Saturday
May 28, 2016

# Posts by nina

Total # Posts: 596

Biology
Is the plasma membrane permeable to glucose or starch?
March 24, 2009

spanish
diario mientra aunque abrazo adornos anteayer casarse tristeza siguiente sorpresa :)
March 17, 2009

spanish
help unscramble these words please. they are in spanish. ridaoi termain qaenuu ozarab ndoaros reatyane rescaas atirztse eisitngeu aposiser
March 17, 2009

Algebra 2
Are a of a sail. The area in square meters for a triangular sail is given by A(x) = x2 + 5x + 6. a) Find A (5). b) If the height of the sail is x +3 meters, then what is the length of the base of the sail?
February 22, 2009

Algebra 2
Demand for pools. Tropical Pools sells an above ground model for p dollars each. The monthly revenue for this model is given by the formula R (p) = - 0.08p2 + 300p. Revenue is the product of the price p and the demand (quantity sold). a) Factor out the price on the right-hand ...
February 22, 2009

Physics
Common light bulbs have a mental filament made of tungsten and when a current passes through it, it radiates visible light, as well as heat. If initially the filament's resistance is 2.45 ohm (6%) at 20 degrees Celsius and the temperature coefficient of resistivity α ...
February 10, 2009

Physics
The problem says 1.65 (plus on top and the minus sign below it) 5 mA I think the plus and minus is the uncertainties. How would you be going about it doing both values.... I have no idea how to solve it and what the outcome is?
February 10, 2009

Physics
A simple circuit is made of a power source, a rheostat and an ohmic resistor. The potential difference across the resistor is initially 5.0 +/- 0.1 V. A good lab student measures the current across the resistor to be 1.65 +/- 5 mA. a)If the student increases the voltage across...
February 10, 2009

science
what is the difference between a chemical reaction and physical separation.
February 8, 2009

science
what is the difference between a chemical reaction ans physical separation.
February 8, 2009

Introductory Chemistry
In a titration 25.1ml of a monoprotic weak acid is neutralized with 25.1 ml of .502M NaOH(aq). Calculate the Ratio of [A-] to [HA] after 12.55 of the .502 M NaOH has been added to the initial amount of HA. Anyone have any idea what's going on. I got as far as to find the ...
February 4, 2009

Chemistry Lab
Do you expect acetaminophen to be soluble in water? why or why not? thanks in advance
February 4, 2009

Chemistry Lab
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not? thanks in advance
February 4, 2009

Chemistry
Hexanoic acid is only slightly soluble in water but is readily soluble (with stirring and shaking) in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each please help...thanksssss
February 4, 2009

Chemistry
Formic acid is only readily soluble in water and in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each
February 4, 2009

Chemistry
Triethylamine, (CH3CH2)3N, is very slightly soluble in water but readily soluble (with stirring) in 1.5 M HCL.
February 4, 2009

Chemistry
February 3, 2009

Chemistry
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not? please help... thanks
February 3, 2009

O-CHEM
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not? please help... thanks
February 3, 2009

O-CHEM
February 3, 2009

O-CHEM
Triethylamine, (CH3CH2)3N, is very slightly soluble in water but readily soluble (with stirring) in 1.5 M HCL.
February 3, 2009

O-CHEM
Formic acid is only readily soluble in water and in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each
February 3, 2009

O-CHEM
the structure didnt come out right but sorry i forgot to write im suppose to give a brief explanation of the reaction for each i have no idea!!
February 3, 2009

O-CHEM
Hexanoic acid (structure below to my best ability) is only slightly soluble in water but is readily soluble (with stirring and shaking) in both 0.6 M NaHCO3 and 2.5 M NaOH. O || /\/\/ \ OH
February 3, 2009

O-CHEM
Considering the tube wherein HCL (1 M) was added to ethyl 4-aminobenzoate. a) what reaction would occur in the tube? b) write a balance equation that supports your explanation above? c) describe what would happen if u added NaOH (6 M) to the same tube? please help!! thank you
February 3, 2009

Chemistry
Considering the tube wherein NaOH (1 M) was added to benzoic acid. a) what reaction would occur in the tube? b) write a balance equation that supports your explanation above? c) describe what would happen if u added HCL (6 M) to the same tube? please help!! thank you
February 3, 2009

O-CHEM
Considering the tube wherein NaOH (1 M) was added to benzoic acid. a) what reaction would occur in the tube? b) write a balance equation that supports your explanation above? c) describe what would happen if u added HCL (6 M) to the same tube? please help!! thank you
February 3, 2009

Calculus
If x + 7y = 29 is an equation of the line normal to the graph of f at the point (1,4), then f'(1) = PLEASEEE HELP!
December 2, 2008

calculus
The problem asks: A curve i nthe plane is defined parametrically by the equation x = t^3 + t and y = t^4 + 2t^2. An equation of the line tangent to the cerve at t = 1 is...? please help. thanks!
December 2, 2008

health
branches of health education
November 22, 2008

physical
branches of physical education
November 22, 2008

physics
WHy is 1-0 in the eguation?
October 26, 2008

Chemistry
A student who was isolating aspirin stopped the experiment after filtration step alumina. One week later, the methanol was evaporated and the experiment was completed. The melting point of the aspirin was found to be 110-115 degrees C. Explain why the melting point was low and...
October 10, 2008

Chemistry
If 185mg of acetaminophen were obtained from a tablet containing 350mg of acetaminophen, what would be the weight percentage recovery? thanks in advance!
October 10, 2008

Chemistry
Consider the following errors that could be made when running TLC. Indicate what should be done to correct the error. a) a two-component mixture containing 1-octene and 1,4-dimethylbenzene gave only one spot with an Rf value of .95. The solvent uses was acetone. b) a two-...
October 9, 2008

Chemistry
Each of the solvents given should effectively separate of the following mixtures by TLC. Match the appropriate solvent with the mixture that you would expect to separate well with the solvent. Select your solvent from the following: hexane, methylene chloride, or acetone. (a) ...
October 9, 2008

Chemistry
Each of the solvents given should effectively separate of the following mixtures by TLC. Match the appropriate solvent with the mixture that you would expect to separate well with the solvent. Select your solvent from the following: hexane, methylene chloride, or acetone. (a) ...
October 9, 2008

Chemistry
Benzyl alcohol (boiling point: 205 degrees C) was selected by a student to crystallize fluorenol (melting point: 153-154 degrees C) because the solubility characteristics of this solvent are appropriate. However, this solvent is not a good choice. Explain PLEASE HELP.... ...
October 9, 2008

Chemistry
A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility the student decides to use benzene as the solvent. After crystallization, the crystals are dried and the final ...
October 8, 2008

Chemistry
Benzyl alcohol (boiling point: 205 degrees C) was selected by a student to crystallize fluorenol (melting point: 153-154 degrees C) because the solubility characteristics of this solvent are appropriate. However, this solvent is not a good choice. Explain
October 8, 2008

pysical science
Write a letter to persuade a friend that a change in temperature does not necessarily mean that a chemical change has occurred .
October 5, 2008

math
I'm not sure of how to solve word problems. The question is,"One lawn fertilizer is 24% nitrogen and another is 12% nitrogen. How much of fertilizer should be mixed to obtain 100 kg of fertilizer that is 21% nitrogen?"
September 18, 2008

math
I'm not sure of how to solve word problems. The question is,"One lawn fertilizer is 24% nitrogen and another is 12% nitrogen. How much of fertilizer should be mixed to obtain 100 kg of fertilizer that is 21% nitrogen?"
September 18, 2008

science
write conclusion:if i place a pencil in a bucket of water what will happen?conclusion is?
September 17, 2008

science
write a hypothesis for questio:if i drop a full toilet paper roll and an empty toilet paperroll will they land on the floor at the same time ;
September 17, 2008

science
write a hypothesis for question:if i drop 2 objects at the same time will they land at the same time?
September 17, 2008

math
How many pounds of hamburger that costs \$1.60 per pound must be mixed with 70 pounds of hamburger that costs \$2.10 per pound to make a mixture that costs \$1.70 per pound.
September 7, 2008

Math
(Tell whether each expression would give you the area or the perimeter of the rectangle) 3) xy 4) y + 2x +y
September 1, 2008

english
Because it is August,the weather is quite unpredictable. The question is-Why is the comma needed after "August"?
August 13, 2008

math-116 final is it a timed test?
8x-(3x+7)=18
June 22, 2008

College Algebra
Suppose that the length of a rectangle is 3 inches longer than the width and that the perimeter of the rectangle is 78. Set up an equation involving only W, the width of the rectangle.
June 16, 2008

Math
May 26, 2008

Math
Could you help explain how to find the Metric Units of Mass?
May 20, 2008

Chemistry
(C) III only because M=mol/L, and mol=grams/molar mass (dimensional analysis). Assuming the same grams for each solution, a higher molar mass would yield a smaller number of moles when divided in the mol=grams/molar mass equation. This same number of moles will be divided by ...
April 29, 2008

marketing
To conclude, early adopters are opinion leaders when a new product just launched into the market. They spread after buying experience and affect the majority of buyers¡¦ attitudes (Rogers). As a result, collect and manage their opinions are important to firms. ...
April 23, 2008

marketing
As has been discussed above, the experiences from early adopters can help marketers to understand the advantages and drawbacks of the product. Therefore, an interview of focus group may be one effective method to listen to consumers¡¦ voice. It has been wildly ...
April 23, 2008

marketing
Can some one help me in English and to see if I answered the question? According to Rogers, consumers can be grouped according to how quickly they adopt a new product. Some consumers adopt the product as soon as it becomes available. On the other hand, some consumers are among...
April 23, 2008

marketing
Discuss the likely considerations and strategy for a company aiming its market launch at Everett Rogers¡¦ ¡¥early adopters¡¦ category.
April 23, 2008

English checking
Thanks for SraJMcGin's proofreading and GuruBlue's information~ This is for the coming exam, hope I can pass without any question.^_^ ############################# The case study is ¡§Seabiscuit-How to market a hit movie¡¨ and several key success ...
April 20, 2008

English checking
Hi, is there anyone who can help me with this essay's English checking? Thank you very much! ################################## TITLE:Based on your analysis for the group presentation, what are the most important implications that you would draw from this case study for ...
April 20, 2008

computers
When I get to the series part of Microsoft Excel 2003 during graphing, what am I supposed to do?
March 26, 2008

microsoft excel 2003
Okay, thank you.
March 26, 2008

microsoft excel 2003
How would I graph equations in Microsoft Excel 2003 and the residuals? I want to graph linear, quadratic and exponential equations but I don't know how.
March 26, 2008

biology
Thank you.
March 26, 2008

division
how to do division.2 goes into 628 how many times
March 19, 2008

biology
Can someone please tell me what part of a cell are sacs that contain digestive material? Also, what part of a cell is a network of canals?
March 10, 2008

biology
Maybe I didn't phrase the question correctly. Sorry if anyone is confused. What I meant is, what part of a cell are sacs that contain digestive material? Also, what part of a cell is a network of canals? That's what I meant to put.
March 10, 2008

biology
What is the network of canals organelle and the group of sacs that contain digestive material? These are supposed to be a part of a cell.
March 10, 2008

Chemistry
energy 3 kg as heat is transfered to 0.22 kg co2 at constant pressure at an initial temperature of 30 degree estimate the final temperature of the gas
November 20, 2007

How do I draw a picture to show how my government system is organized?
September 27, 2007

riddle
A quarter and a nickel. The other one is a nickel :)
May 19, 2007

law
how can i advise Robert about the proposed meeting to change the constitution of Wellbuilt Pty Ltd with particular reference to his rights in relation to the his shares? Wellbuilt Pty Ltd is a large proprietary company running a medium sized commercial construction business in...
April 4, 2007

law help plz
what would be the argument Susan Smith (the company accountant) has been approached by XYZ Ltd, a major client of Wellbuilt Pty Ltd, with a business proposal that appeared too attractive to refuse. Susan incorporated her own company to enter this contract. Her company made a ...
March 30, 2007

corporate law help
what would be the revelent issue Tom, a new director has found he has not been re-imbursed for expenses he incurred when he went on a familiarisation trip to various company premises. What did his employment contract say? What did his company's written policies say on the ...
March 30, 2007

jewelry markings
I just purchased a piece of costume jewelry. It has 5 large, rectangular stones with large links between each stone. The clasp has what appears to be 885 with a fish symbol behind it. Any ideas on what this means? These sites might give you some information: http://www.google....
March 21, 2007

law
what ways ae companies to be distinguished from partnership Thank you for using the Jiskha Homework Help Forum. Here is some information for you: 1. (Broken Link Removed) 2. (Broken Link Removed) 3. http://www.residual-rewards.com/business-types.html
March 21, 2007

LAW
what are the methods by which a corporation can be created http://www.google.com/search?q=form+corporation&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA There should be some answers here. I'm sure it varies, state by state. =)
March 20, 2007

marketing
how ca i create a brand name and hw can i say that the name is relevant to the business Thank you for using the Jiskha Homework Help Forum. First of all, you need to pick a business. The yellow pages can give you lots of ideas.
March 13, 2007

marketing
what can be a new type of office paper recyling service in australia Thank you for using the Jiskha Homework Help Forum. Although I didn't see anything specifically referring to Australia, here is something to check: http://www.dse.vic.gov.au/DSE/nrence.nsf/LinkView/...
March 13, 2007

inro to marketing
what will be a three product layers in recycling Thank you for using the Jiskha Homework Help Forum. Hopefully the following link is referring to y our post: http://www.toyoda-gosei.com/products/recycle/index_04.html
March 13, 2007

us history intro and conclusion
i posted earlier about my DBQ for my us history class, and i just need to know how i should go about opening and closing what i am saying. it's the only part i have trouble on. heres the question again: In what ways and to what extent did constitutional and social ...
March 4, 2007

us history
i have a DBQ that i'm not sure how to introduce (the first paragraph). the question is: in what ways and to what extent did constitutional and social developements between 1860 and 1877 amount to a revolution? thanks in advance You might consider something like this: The ...
March 3, 2007

main legal issues
CATCHWORDS: CORPORATIONS - statutory derivative action - application by 35% shareholder/director to bring derivative proceedings after company's assets were transferred to a company from which the applicant is excluded - inadequacies of proposed points of claim - whether ...
March 2, 2007

corporate law
what would be the major issues in this CORPORATIONS LIST AUSTIN J FRIDAY 1 SEPTEMBER 2006 5189/05
March 2, 2007

math
Duke Maverick worked for a packaging company. One Day, Duke recieved four seperate orders and acidentally mixed up the addresses, so he applied the address labels at random, what is the probability that exactly three packages were correctly labeled? If three were labeled ...
February 22, 2007

science
Which one of the following words does not belong with the others and why? Father Aunt Sister Cousin Mother Uncle You and your sister have the same parents. Your father, mother, aunt, and uncle have the same sets of parents -- your two pairs of grandparents. However, your ...
February 22, 2007

Pre-Algebra
3 Years.
February 5, 2007

ethics
What do race and ethnicity mean to you? Since this is your question, I suggest you answer it. Your teacher wants to know what YOU think -- not what some anonymous person online thinks about it. It might help to think of your friends and what would happen to your feelings ...
October 17, 2006

ethics
Why are the concepts of race and ethnicity important to United States Society? The concepts of race and ethnicity are important to U.S. society for two main reasons. First, the U.S. enslaved African-Americans for over 200 years. Their descendants still suffer the effects of ...
October 17, 2006

Low recovery
Thank you so much. I'm struggling for this question from last night.
September 26, 2006

biology
what kind of bone comprises the proximal epiphysis of the femur? spongy bone
September 21, 2006

Math: Direct Variation
how do you solve a direct variation problem?
September 21, 2006

algebra
Suppose f(x)=Ax+B for real constants A and B. If f(60)=70 and f(72)=79, find k such that f(k)=k. PLEASE HELP :] Ok we have f(x)=Ax+B which is a line. We also know (1) f(60)=70 which means A*60+B=70 (2) f(72)=79 " " A*72+B=79 Which means A*12=9 if we subtract (1) from...
September 5, 2006

reding
A ghastly mistake (A) surprising (B)horrible (C)pale (D)original "horrible" can be considered a synonym for "ghastly". The other words cannot. To find synonyms, it's quite fast to use any of the following: http://www.dictionary.com http://www.thesaurus....
September 4, 2006

Algebra
Find the base three representation of 237. PLEASE HELP. I HAVE NO IDEA 3^4=81 so there must be 3 of those (3*81=162 237-162=75 3^3=27 so there must be two of those 2*27=54 75-54=21 3^2=9, so there are two of them 21-18=3, so one three 3^0=1, so none of those. 22210 base 3 2*3^...
August 23, 2006

Economics
question 7 a
August 15, 2006

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