Saturday
October 25, 2014

Posts by anna


Total # Posts: 1,997

physics
whoever already answered this question was very, very incorrect. your formulas may be, but your own calculations don't even come out to the numbers you have.
March 5, 2012

Chemistry
A sample of gas at 47 C and 1.03 atm occupies a volume of 2.20 L. What volume would this gas occupy at 107 C and 0.789 atm?
March 4, 2012

Physics
A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 45.0 N at an angle è above the horizontal, as shown in Figure 7-23. After the block is pulled through a distance of 1.50 m its speed is v = 2.90 m/s, ...
March 1, 2012

Physics
A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 45.0 N at an angle è above the horizontal, as shown in Figure 7-23. After the block is pulled through a distance of 1.50 m its speed is v = 2.90 m/s, ...
March 1, 2012

ENglish
why does it make sense for us to form a parody of Romeo and Juliet?
March 1, 2012

microbiology
all coliforms ferment glucose but none of the media used for this test includes glucose why is glucose not used
February 29, 2012

Global History
what are the cultural diffusions between japan and korea
February 26, 2012

Economics
Can you tell me please if my answer is right to the following question? The question: present Adam Smith's theory of value and limitations. 1. Labor cost: he supported that everyone must produce his own goods using own labor and exchange the surplus with other goods. In ...
February 25, 2012

Economics - Edit question
Is my answer correct? The question: present Adam Smith's theory of value and limitations. My answer: Adam Smith supported three different views of theory of value 1. Labor cost: he supported that everyone must produce his own goods using own labor and exchange the surplus ...
February 25, 2012

chemistry
Cocaine is a non-electrolyte that has a molecular weight of 303.4 g/mole. How many grams must be dissolved in 25.0 mL of Chloroform (density = 1.484 g/mL) to raise its boiling point to 65.5 Celsius? The boiling point of pure Chloroform is 61.2 Celsius. Kb Chloroform = 3.62 ...
February 24, 2012

Chemistry
How do you calculate delta T for H2O?
February 24, 2012

chemistry
does this equal the same amount of moles of HO2CCO2H?
February 24, 2012

chemistry
weight of watch glass+funnel= 121.573g weight of watch glass+funnel+CaC2O4H2O=122.044 g how many moles of CaC2O4H2O were isolated during the experiment? related equations: HO2CCO2H + OH- -> -O2CCO2- + H2O Ca2+ + -O2CCO2- + H2O ->CaC2O4*H2O
February 24, 2012

English
What opportunities does the online community offer that the actual community doesn't?
February 21, 2012

English
Okay thank you. I do not need it anymore though.
February 21, 2012

English
Where do you find the editor of a certain article of a website? Where can you find the name of the organizatin that associated with the site??
February 21, 2012

Business
Does anyone know any specific businesses who use the online community for business deals through online video chats, with those around the world, instead of face to face in the actual community?
February 21, 2012

Algebra
A ranger spots a forest fire while on a 45-meter observation tower. The angle of depression from the tower to the fire is 12 degrees. To the nearest meter, how far is the fire from the base of the tower? IS THE ANSWER 212 meters
February 18, 2012

Algebra
(x^9)^0(x^7)^2
February 18, 2012

Algebra
(x^9)^0(x^7)2
February 18, 2012

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 78 N the acceleration of the box is 0.46 m/s2; when you increase the force to 86 N the acceleration is 0.76 m/s2. (a) Find the mass of the box. (b) Find the ...
February 12, 2012

trig
If csc theta is equals to negative and theta is in the 3rd quadrant? a.find the other trigonometric function? b.find the value ofthe angle?
February 8, 2012

Living Environment
Explain why proteins are polymers but lipids are not.
February 6, 2012

English(Romeo and Juliet)
Capulet asks Nurse where Juliet has gone in the beginning of Act IV, scene 2. The Nurse indicates that she went to Friar Lawrence for confession purposes. Capulet responds by saying, "Well, he may chance to do some good in her. A peevish self-willed harlotry it is." ...
February 2, 2012

Living Environment
Can you find the latest Living Environment regents ?
February 2, 2012

English(Romeo and Juliet)
I need help with Romeo and Juliet Do you think it's appropriate to risk your life to be with another? Why do you think Juliet resorts to this? Explain In other words, what influences her decision?
February 1, 2012

Physics
A car is traveling 17 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?
February 1, 2012

Statistics
A study was conducted to investigate relationships between different types of standard test scores. On the Graduate Record Examination verbal test, 18 women had a mean of 538.82 and a standard deviation of 114.16, and 12 men had a mean of 525.23 and a standard deviation of 97....
February 1, 2012

science
Runner A is initially 5.0 km west of a flagpole and is running with a constant velocity of 4.5 km/h due east. Runner B is initially 7.0 km east of the flagpole and is running with a constant velocity of 6.5 km/h due west. How far are the runners from the flagpole when their ...
January 31, 2012

Algebra1
Mrs.Culowski traveled 24.0 kilometers north and then 10.0 kilometers east. How far was she from her starting point? use pytheorn Theorm i need help seting up the problem?
January 31, 2012

Math Help
The length of an object in feet is equal to 3 times its length in yards. The length of a waterslide is 48 feet. Write and solve a multiplication equation to find the length of the waterslide in yards.
January 30, 2012

Biology
In human body, substances from blood filter through a membrane into renal tubule (kidney). What does an increase in the driving pressure correspond to?
January 28, 2012

Science
E = mc2 is a formula that shows, in mathematical terms, the relationship between energy and mass. In this formula, E is energy, m is mass, and c is the speed of light. The number 2 to the upper right of the c means that c is squared, or multiplied by itself.
January 28, 2012

Biology
What will happen to human red blood cells (crenate, lyse, or no change) if they are placed in the following solutions? 20% NaCl solution
January 28, 2012

Calculus-Related Rates
Three elementry kids are at a field day hula hoop contest. They were the last one standing of the heated competition. They have been hula hooping for 10minutes. Student1 (S1) is at point (6,5); Student2 (S2) is at point (6,1) while student 3(S3) is at (1,1). Finally, the gym ...
January 25, 2012

physics
A car stops for a red ligth. The light turns green and the car moves for 3 seconds at a steadily increasing speed. During this time, it travels 20 meters. The car then travels at a constant speed for another 3 seconds for a distance of 30 meters. Finally, when approaching ...
January 22, 2012

Physics!!!
A small sphere of mass m = 6.40 g and charge q1 = 30.3 nC is attached to the end of a string and hangs vertically as in the figure. A second charge of equal mass and charge q2 = −58.0 nC is located below the first charge a distance d = 2.00 cm below the first charge as ...
January 19, 2012

physics
a 2kg pendulum swings at the bottom of a 1m rope. hen the pendulum is at the bottom of the swing, it is traveling at 2 m/s. determine the tension of the rope
January 18, 2012

physics
a 2kg pendulum swings at the bottom of a 1m rope. hen the pendulum is at the bottom of the swing, it is traveling at 2 m/s. determine the tension of the rope
January 18, 2012

math
Enter in standard form the equation of the line passing through the given point and having the given slope. B(2, - 5), m = -2/3
January 16, 2012

math
Where p and q are statements, "p and q" is false if p is false. Always Sometimes Never
January 16, 2012

math
The width of the rectangle is half its length and the perimeter is 42m.caculate the area of the rectangle.find the width and length of perimeter and area.
January 12, 2012

trig
I need help finding derivatives and antiderivatives. Given: f(x),find f'(x) 1. f(x)-2x^6 2. f(x)= -3x +7 3. f(x)= 3x^2 - 5x 4.f(x)= 1/2x^2 - x + 4
January 12, 2012

Organic Chemistry
So for the actual calculation.. would i just go 0.95 g benzoic acid * (10mL/0.680 g)?
January 10, 2012

Organic Chemistry
An impure sample contains 0.95g of benzoic acid and 0.05 of salicylic acid. Solubilities in water of the two compounds are given in the following table. Solubility at 20 degrees (g/10mL) benzoic acid: 0.029 salicylic acid: 0.22 Solubility at 100 degrees (g/10mL) benzoic acid: ...
January 10, 2012

Fine Arts
Thank you. Its in that category for my class. Do you know where i could find the influences upon Jack Kirby and Joe Simon??
January 9, 2012

Fine Arts
I am doing a report on the original comic book Captain America. I need to know the author, publishing date, info that pertains to the comic. Does anyone know where i can find it?
January 9, 2012

physics
a hydraulic lift is designed for a gain of 100, so that a 10 N force applied at theinput piston will produce a force of 1,000 N at the output piston. If the radius of the input piston is 2 cm, the radius of the output is a) 200 cm, b) .02 cm c) 400 d) 20 e) .05
January 8, 2012

physics
a cube of side L is made of a substance that is 1/4 as dense as water. WHen placed in a calm water bath the cube will a) float with 1/2 L abovethe surface b)sink to the bottom, c) float with 1/4 L above the surface d) float with 1/4 L below the surface e) float with 3&...
January 8, 2012

Chemistry
If 0.273 moles of ferrous ammonium sulfate (Fe(NH4)2(SO4)2 . 6H2O) and an excess of all other reagents are used in a synthesis of K2[Fe(C2O4)3] . 3H2O, how many grams of product will be obtained if the reaction gives a 100% yield? Please help i found the molar mass of (Fe(NH4)...
January 7, 2012

Science
If .275 moles of ferrous ammonium sulfate (Fe(NH4)2(SO4)2. 6H2O) and an excess of all other reagents are used in a synthesis of K3[Fe(C2O4)3].3H2O, how many grams of product will be obtained if the reaction gives a 100% yield? Can someone help me solve this I found the molar ...
January 7, 2012

History
I have to write three major events or ideas from the book Tortilla Flat by John Steinbeck. I don't really know what could be considered as a major event. I know one can be that Danny died, falling into a ditch while he was drunk. Im not sure what else to write. Please help.
January 2, 2012

math
if the input is 24 what is the output? the table is: the input table: x,4,8,12,16 the output table is: y,1,2,3,4
January 2, 2012

math
If tan(xy) = x, then dy/dx =
December 30, 2011

world history
A strong, efficient government helped to unite Charlemagne's empire.
December 9, 2011

Science
Umm....... Do you mean, like, what I would do if I did the experiment again? What I would do to improve the experiment?
December 3, 2011

Science
For my science project, it says to write a "Future Research" section to go on the board. Could you just explain to me what exactly goes in that section? I'm so confused!
December 3, 2011

algebra
How do I graph the function f(x)+1/4x+4?
December 2, 2011

Need help
Studies have demonstrated that "latchkey children"
December 1, 2011

math
what is the area of a rectangle that is 3 yards wide by 8 yards long?
December 1, 2011

History
I need to list 3 problems of the colony that Stephen Fuller Austin founded. I have two of the three- -no food -bad indian relations I need one more!
November 30, 2011

Math
2x^2+8x=-5
November 27, 2011

chemistry
b) no reaction in the dark
November 22, 2011

chemistry
A) CH4 +Br2 sunlight-> CH3Br + Br
November 22, 2011

Science
So I'm in 7 grade and doing a science project. I have a question: What does it mean when it says: RESEARCH? I am required to have this on my board. Does it mean what I looked up to help me on this project? Also, what does it mean when it says: DATA? Do I just summarize ...
November 21, 2011

Chem
Rank thefollowing elements in order of decreasing atomic radius. N, B, Be, Li? I thought it was N, B, Be, Li
November 14, 2011

Math-Help please?
Michael owns 300 shares of a certain stock. Suppose the price of the stock drops by $4 per share. Write a multiplication equation to find the change in Michael's investment. I put 300x(300x[-4]) is that right?
November 14, 2011

algebra
welcome! :)
November 14, 2011

algebra
yeah you are right, the lines mean absolute value, which is the numbers distance form zero. -25's distance form zero is 25, so you would put 25.
November 14, 2011

algebra
the dimensions are 6m by 8m
November 14, 2011

math
for the polynomial shown below, find f(-1). f(x)=3x^4-x^3+4x-2
November 14, 2011

Math
Based on its degree, what kind of polynomial is this? h(x)=-x^2+2x-5
November 14, 2011

english
Please could you help me with 6 words with silent letters ...please
November 14, 2011

physics
a pet truck is moving at 25m/s north, a dog inside moves at 1.75 m/s at angle 35 degrees east of north. What is the velocity of the dog relative to the road?
November 13, 2011

Math
What is the volume of a sphere with a radius of 7 cm? Use 22/7 as pi.
November 13, 2011

chem
Suppose that the microwave radiation has a wavelength of 10.8cm . How many photons are required to heat 295ml of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997g/ml , and specific heat capacity, 4.184J/(gk) , as water over this temperature range
November 11, 2011

english
why do u think Edwards felt it was necessary to terrify his puritan audience into action?
November 9, 2011

Math
A television station has 28 new TV shows scheduled to air this week. What fraction of the television shows, in simplest form, are 30-minuet programs?
November 8, 2011

chemistry
Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%
November 3, 2011

chemistry
Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%
November 3, 2011

physics
water at 20°C has viscosity n=1.0*10^-3 Ns/m^2. sand grains have density 2400kg/m^3. suppose a 1.1 mm diameter sand grain is dropped into a 51m deep lake whose water is a constant 20°C. If the sand grain reaches terminal speed almost instantly (a quite good ...
November 2, 2011

physics
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.5 x 10 exponent 5 kg, its speed is 27.0 m/s and the net braking force is 4.30 x 10 exponent 5 N, (A) what id its speed 7.50 s later? (b) how far has it traveled in this time?
November 1, 2011

chemistry
and what is the theoretical yield?
October 29, 2011

chemistry
a student set up a reaction with 0.2905g of cholesterol and 0.13g of nonanoyl chloride in excess triethylamine, and collected 0.0244g of solid product. what is the actual yield (in grams) of cholesteryl nonanoate? explain how to do this please :)
October 29, 2011

calculus
thanks!
October 28, 2011

calculus
Find all values of 'a' such that y=a/(x−9) and y=x^2−18x+81 intersect at right angles. show steps please :)
October 28, 2011

MATH
A town decides to build a playground using one of the existing walls beside an elementary school. What is the maximum area they can enclose using only 100ft of donated fence?
October 28, 2011

physics
Suppose a 46-N sled is resting on packed snow. The coefficient of kinetic friction is 0.11. If a person weighing 625 N sits on the sled, what force is needed to pull the sled across the snow at constant speed?
October 27, 2011

science
How does the Kinetic Theroy of Heat explan Solids, Liquids, and gasses?
October 24, 2011

science
What is the difference in Thermal Energy and Heat.
October 24, 2011

Phyisical science
How much energy is in a soccer ball that is moving at 3 m/s and has a mass of 2kg.
October 24, 2011

chemistry
A 48 g sample of water at 98.°C is poured into a 55 g sample of water at 15°C. What will be the final temperature of the mixture?
October 20, 2011

Please check drwls
1.C 2.d 3.A I don't know is it correct.
October 20, 2011

Chemistry
What would be the products of this chemical reaction?? Co(NO3)2 (aq) + NH3 (aq) = ?????? a precipitate is supposed to be formed.
October 18, 2011

chemistry
CH3OH(g) ----> CO(g) + 2H2 (g) (delta H =+90.7k) A) is heat absorbed or released in the course of this reaction? b) calculate the amount of heat transferred when 45.0g of CH3OH(g)is decomposed by this reaction at constant pressure. c) for a given sample of CH3OH, the ...
October 17, 2011

chemistry
72g
October 2, 2011

accounting
Describe the relationship of the financial statements used in the financial plan for 2010 for Patton-Fuller Community Hospital.
September 30, 2011

Chemistry
Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH
September 29, 2011

Chemistry
Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH
September 29, 2011

Chemistry
Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH
September 29, 2011

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