Friday
August 22, 2014

Posts by nina


Total # Posts: 460

Physics
Calculate how far and apart two indentical charges of 1.0 C must be in order for the Coulomb force between them be less than 500 N
May 10, 2010

Physics
thx
May 10, 2010

Physics
How many electrons must be removed from an object to leave it with a charge of 2.0 x 10 exp-10C? This is a small though not neglible static charge.
May 10, 2010

Physics
for same question above if the charge is increased by a factor of 10 what number am I increasing? and am I increasing it by adding or multiplying?
May 10, 2010

Physics
calculate the force between two identical charges of 1.0 x 10 exp -9 C separated by 1.0 Cm
May 10, 2010

Physics
So if one electron is 1.6 x 10 exp -19 C it would be -1.0 x 10exp-9C divided by 1.6 x 10 exp -19 C correct?
May 10, 2010

Physics
How many excess electrons does an object with a total charge of -1.0 x 10exp-9C have on it? This is approximately the amount of charge involved in commonly encountered static electricity.
May 10, 2010

Us constitution
what the United States may have looked like had the Anti-Federalists "won" their points in the ratification debate and the writing of the Constitution
May 4, 2010

Physics
An ice cube having a mass of 50 g and an initial temperature of -20⁰C is place in 400 g of water 30⁰C water. What is the final temperature of the mixture if the effects of the container can be neglected?
April 19, 2010

apchemistry
If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you
April 18, 2010

Mathematicas
Sam and Susie are twins. Sam has as many brothers as he has sisters. Suzie has at least 1 sister, and twice as many brothers as sisters. How many kids are in the family altogether?
April 18, 2010

Mathematicas
Sam and Susie are twins. Sam has as many brothers as he has sisters. Suzie has at least 1 sister, and twice as many brothers as sisters. How many kids are in the family altogether?
April 17, 2010

4 Grade
About how many people lying head-to-toe are needed to strech around the earth? Is it closest to : a) 1 million; b) 25 million; c) 100 million? (Hint: The distance around the earth is approximately 25,000 miles).
April 6, 2010

computer programming
Construct a structure chart, as well as a flowchart and pseudocode, for the following problem. Assume that each input record contains a taxpayer’s name, the value of a personal property belonging to the taxpayer, and a code defining the type of of personal ...
March 22, 2010

Math
Julio ordered towo pizzas for dinner Friday. Dad ate 3/4 of one pizza, Jenny ate 1/8 of a pizza, Danny ate 1/4 of a pizza, and Mom ate 1/2 of a pizza. What fraction of a pizza was left for a midnight snack? Mr. L answered to my question like this: 6/8 + 1/8 + 2/8 + Mom = ?/8 ...
March 9, 2010

Math
It will be 13/8 = 1 5/8. Is that right?
March 9, 2010

Math
Julio ordered towo pizzas for dinner Friday. Dad ate 3/4 of one pizza, Jenny ate 1/8 of a pizza, Danny ate 1/4 of a pizza, and Mom ate 1/2 of a pizza. What fraction of a pizza was left for a midnight snack?
March 9, 2010

math
how do I graph this? y = -1/3 |x-2| like, I can do the simple ones (ex: y = -|x+3|), where you put random number for x and get the y value and graph it.. but the fraction confused me.. thanks in advance
March 9, 2010

Math
In the United States, every 57 minutes an underage drinker is involved in a traffic fatality. A recent report urges a crackdown on teen-age drinking and driving. Estimate the number of underage drinkers involved in traffic fatalities each day.
March 3, 2010

Physics
what am I converting?
February 8, 2010

Physics
When the brakes of a certain car are applied, a deceleration of 6.0 sec squared is produced. a) How much time will it take to bring the car to a halt from an initial speed of 110km/hr? b) How far will it travel in that time?
February 8, 2010

History
How did the economical compostion during coperate greed in the 1980s and how it affected the political climate during this time. Is this asking for me to put in how Reagan gave to the rich and not the poor?
February 2, 2010

physics(universal law of gravitation)
a satellite has a mass of 100 kg and is located at 2 x 10^6 m above the surface if the Earth. wHAT is the potential energy associated with the satellite at this location? What is the magnitude of the gravitational force on the satellite?
January 14, 2010

Math
log6(x+7)−log6x=2 Solve for x
January 10, 2010

Logs
log6(x+7)−log6x=2 Solve for x
January 10, 2010

Juvenile Justice
I need to write a profile on risk indicators for youths that could be invloved in gangs. How can I write this without looking like an actual paper, but more or less like a handout that is going to be given?
December 15, 2009

Math Help
Prove that the cancellation law of multiplication is equivalent in a commutative ring to the assertion that the product of non-zero factors is not zero
December 11, 2009

U.S. History
Defend McCarthyism as appropriate for the time in which it occurred.
December 3, 2009

social studies
what political party did saddam hussein lead in iraq
November 30, 2009

Pre-Algebra
I am having trouble understanding how to answer this type of question: Find each procuct or quotient: Express using positive exponents: (b to the power of negative 10)(b to the power of 5)
November 23, 2009

science
My grandson is in 4th grade. His teacher assigned the class to make a container that will keep an ice cube frozen for several hours while inside. Do you have any ideas?
November 17, 2009

physics
One projectile is launched horizontally while another is dropped from rest at the same time. Which will hit the floor first?
November 16, 2009

social studies
Rude...^ I I I I
October 12, 2009

Math Analysis (similar to my previous question)
A + B = < 30,000 A > = B B = < 12,000 B return > A return In order to maximize money we have to invest it. The rate of retern is highest with the B bond so, A + 12,000 = 30,000 B = 12,000 A = 18,000
October 6, 2009

Math Analysis
1700 > = C (calories) > = 900 0.30(1200) = 360 max calories from fat 372 > 360 too much fat
October 5, 2009

Grade 7 Math
1 + 99 2 + 98 3 + 97 ............... ............... 49 51 + 50 49(100) + 50
October 5, 2009

math
max say max is innocent james says max and james is innocent brett says max and james is innocent if max and james are innocent both james and brett would be telling the truth which means two people would be innocent -> max is telling the truth that he is innocent -> ...
October 5, 2009

Math
bedmas brackets then equations then division then multiplication then addition then subtration
October 5, 2009

Math
Bedmas brackets equations division multiplication addition subtraction 2 + 1/8 = (16 + 1)/8 = 17/8
October 5, 2009

Chemistry
how can i know if a solution is aqueous or solid? i have a test tomorrow and dont know how to do this PLEASE HELP!!! i have this question on my homework...Will precipitation occur when the following solutions are mixed? 1. Na2Co3 and AgNO3 2. NaNO3 and NiSO4 3. FeSO4 and Pb(NO3)2
October 4, 2009

Economics
goods produced by the govt are called public goods. externalities are things which you can not charge for ie a negative externality would be smog a positive externality would be clean air
October 4, 2009

chemistry
how can i Specify what ions are present in solution upon dissolving each of the following substances in water: ZnCl2, HNO3, (NH4)2SO4,Ca(OH)2
October 4, 2009

Economics
c x 0.20 = 15,000 c x (1/5) = 15,000 c = 15,000 x 5
October 4, 2009

math prime factorization
write the prime factorization of 15 using exponents.
September 28, 2009

MATH
PRIME FACTORIZATION OF 15 USING EXPONENTS
September 28, 2009

actually it is about computers
I tried to do the same thing and could not, I had to use windows movie maker instead, turned out great!
September 25, 2009

stats
3. For a particular sample of 50 scores on a psychology exam, the following results were obtained. Mean = 78 Mode = 84 Median = 80 Standard deviation = 11 1. What score was earned by more students than any other score? Why? 2. What is the variance?
September 17, 2009

Science
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
August 26, 2009

Mathematics
Umm...what?
August 14, 2009

Mathematics
Solve the following equation for x, where 0 </ x 2(pi). tan^2x=1
August 14, 2009

Systems (maths)
Determine the system which is equivalent to the system: 3x+4y=12 x-2y=9 a) 3x+4y=12 3x-6y=27 b) 3x+4y=12 2x-4y=18 c) 10y=-15 5x=30 d) Any of A,B or C
July 25, 2009

antigone
Is the forth question A or b?
July 2, 2009

English
Dona Stein's "Putting Mother By" the poem is on Ploughshares, but i can't post the link. I have to write an essay/commentary/analysis on the poem, and i was wondering if someone could check up on my first paragraph. I know it's all one big metaphor, about...
June 10, 2009

Math
An eagle is hunting a bird in flight. The eagle begins its descent from a height of 74m. The eagle reaches its prey at a height of 3m. This situation can be modelled using the formula: 74=3+6t. t represents the time in seconds, but i'm not sure what 6 represents.
May 10, 2009

Economics
Explain two possible causes of Recession in an Economy using an AD/AS Diagram.
April 29, 2009

social studies
Thank you so much!!!!!!!!
April 13, 2009

social studies
Ms.Sue Sorry i will type you another time i gota go.Thank you so much i know you only answered one question but i have it done.My older brother helped me and,i asked him earlier but he wouldnt help but since he wanted to get on the computer so bad.... laugh out loud!!! but ...
April 13, 2009

social studies
what do you meen?
April 13, 2009

social studies
PLEASE HELP!!!!!!!!
April 13, 2009

social studies
well ms.sue the book does mention calligraphy and landscapes and paintings sorry i may have missed that part
April 13, 2009

social studies
true or false:in this region learning is viewed as dangerous to society.the region is east asia and southeast asia please help!!!!
April 13, 2009

social studies
thank you and it says that craftspoeple in east asia and southeast asia are also skilled at weaving carving and making pottery and thats all i could find for that
April 13, 2009

social studies
please help me (emergency)
April 13, 2009

social studies
the chapter is about east asia and southeast asia
April 13, 2009

social studies
true or false:arts in the region include landscapes paintings calligraphy weaving carving and pottery making. PLEASE HELP ME!!!THIS PAPERS DUE TOMORRW AND I CANT FIND AN ANSWER
April 13, 2009

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
Do you expect acetaminophen to be soluble in water? why or why not? please help... thanks
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
Do you expect acetaminophen to be soluble in water? why or why not? please help... thanks
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

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