# Posts by nina

Total # Posts: 657

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?

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

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?

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?

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).

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

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 ...

Math
It will be 13/8 = 1 5/8. Is that right?

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?

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

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.

Physics
what am I converting?

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?

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?

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?

Math
log6(x+7)−log6x=2 Solve for x

Logs
log6(x+7)−log6x=2 Solve for x

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?

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

U.S. History
Defend McCarthyism as appropriate for the time in which it occurred.

social studies

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)

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?

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

social studies
Rude...^ I I I I

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

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

1 + 99 2 + 98 3 + 97 ............... ............... 49 51 + 50 49(100) + 50

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 -> ...

Math
bedmas brackets then equations then division then multiplication then addition then subtration

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

Chemistry
how can i know if a solution is aqueous or solid? i have a test tomorrow and don't 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 ...

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

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

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

math prime factorization
write the prime factorization of 15 using exponents.

MATH
PRIME FACTORIZATION OF 15 USING EXPONENTS

I tried to do the same thing and could not, I had to use windows movie maker instead, turned out great!

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?

900 times 100,000 or 9,000 times 10,000.

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 ...

Mathematics
Umm...what?

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

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

antigone
Is the forth question A or b?

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...

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.

Grammar
At the stroke of midnight, the fireworks _____ into the night sky.

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

social studies
Thank you so much!!!!!!!!

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 ...

social studies
what do you meen?

social studies

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

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!!!!

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 that's all i could find for that

social studies

social studies
the chapter is about east asia and southeast asia

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

Biology
Is the plasma membrane permeable to glucose or starch?

spanish
diario mientra aunque abrazo adornos anteayer casarse tristeza siguiente sorpresa :)

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

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?

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 ...

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 ...

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?

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...

science
what is the difference between a chemical reaction and physical separation.

science
what is the difference between a chemical reaction ans physical separation.

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 ...

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

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

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

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

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

Chemistry

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

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

O-CHEM

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

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

O-CHEM
the structure didn't 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!!

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

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

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

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

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!

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!

health
branches of health education

physical
branches of physical education

Yes because when multiplying, each group needs to have equal groups.

physics
WHy is 1-0 in the eguation?

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...

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

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-...

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) ...

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) ...

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.... ...

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 ...

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

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