Friday
February 12, 2016

# Posts by andrew

Total # Posts: 1,095

Chemistry
Determine the volume of a 0.550 M KMnO4 solution required to completely react with 2.55 g of Zn.
March 19, 2010

math
What is the probability that exactly three children in a family of five children will be boys? Assume that P(boy)=P(girl)
March 9, 2010

Volume of a rectangular prism
Thanks. Therefore, the answer is 512. 2 x 16 x 2 = 64 4 x 32 x 4 = 512 Appreciate your help, Andrew
March 1, 2010

Volume of a rectangular prism
Hello, if the volume of a rectangular prism is LWH = 64 cubic inches, what are the dimensions of a rectangular prism with dimensions twice as long? Thank you!
March 1, 2010

science
Explain the similarities and differences of the multicellular stages of acellular and cellular slime molds.?
February 27, 2010

MATH
f(x)= 3x+9/(x^2-100) If this function has a horizontal asymptote, give its y-value Find the x-intercept(s). Find the y-intercept
February 24, 2010

ENGLISH
CAN SOMEONE HELP ME WITH WRITING AN EPIC POEM ABOUT A HERO? MY ASSIGNMENT IS DUE MAR. 1. IT HAS TO BE 4 PAGES LONG.
February 24, 2010

Physics
Suppose the coefficient of static friction between the road and the tires on a car is 0.60 and the car has no negative lift. What speed will put the car on the verge of sliding as it rounds a level curve of 29.3 m radius?
February 18, 2010

Physics
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 35 km/h and the μs between tires and track is 0.35?
February 18, 2010

chemistry
You are asked to prepare 150.0 mL of 3.15×10−2 M AgNO3. 2.) An aqueous solution is 6.40% methanol CH3OH by mass, with d = 0.988 g/mL} What is the molarity of CH3OHOH} in this solution?
February 16, 2010

chemistry
thank you
February 16, 2010

chemistry
1.)How many grams would you need of a sample known to be 99.81% AgN03 by mass? You are asked to prepare 150.0 mL of 3.15×10−2 M AgNO3. 2.) An aqueous solution is 6.40% methanol CH3OH by mass, with d = 0.988 g/mL} What is the molarity of CH3OHOH} in this solution?
February 16, 2010

chemistry
1.)How many grams would you need of a sample known to be 99.81% AgN03 by mass? You are asked to prepare 150.0 mL of 3.15×10−2 M AgNO3. 2.) An aqueous solution is 6.40% methanol CH3OH by mass, with d = 0.988 g/mL} What is the molarity of CH3OHOH} in this solution?
February 16, 2010

chemistry
2.) How much heat must be absorbed at 1357 K to melt a bar of copper (80 * 10 * 12 cm) assume d = 8.93 g/cm^3. The normal boiling point is 1357 K, and heat of fusion is 13.05 KJ/mol.
February 15, 2010

chemistry
How much heat, in kilojoules, is evolved when a 3.70 kg sample of molten Cu freezes? The normal boiling point is 1357 K, and heat of fusion is 13.05 KJ/mol. 2.) How much heat must be absorbed at 1357 K to melt a bar of copper (80 * 10 * 12 cm) assume d = 8.93 g/cm^3.
February 15, 2010

chemistry
How much heat, in kilojoules, is evolved when a 3.70 kg sample of molten Cu freezes? The normal boiling point is 1357 K, and heat of fusion is 13.05 KJ/mol. 2.) How much heat must be absorbed at 1357 K to melt a bar of copper (80 * 10 * 12 cm) assume d = 8.93 g/cm^3.
February 15, 2010

AP Chemistry
The combustion of 1.00 mol of sucrose,C12H22,O11, evolves 5650 kJ of heat. A bomb calorimeter has a calibrated heat capacity of 1.23 kj/degree Celsius. How many grams of sucrose should be burned to raise the temperature of the calorimeter and its contents from 23 degrees C to ...
February 15, 2010

Philosophy
What fallacies, if any, are present in the following passage? Can you please give reasons for your answer, that is, if you say that a fallacy has been committed, then show where the fallacy occurred, and explain why you think it is a fallacy? The following is the paragraph. ...
February 12, 2010

Physics (2)
Consider a charged ring of radius 43.4 cm and total charge 18 nC. We are interested in the electric field a perpendicular distance z away from the center of the ring. At what distance from the center of the ring does the electric field become maximum ..so E=kQ/(x^2)at a ...
February 11, 2010

Physics
Consider a charged ring of radius 43.4 cm and total charge 18 nC. We are interested in the electric field a perpendicular distance z away from the center of the ring. At what distance from the center of the ring does the electric field become maximum?
February 11, 2010

Calculus
how did you get the 8cm?
January 31, 2010

Social Studies
One of the biggest reasons for the increased European agricultural production in the medieval period was? A) the introduction of a heavier plow. B) the official support of the serfs by the popes. C) the introduction of new crops from the Byzantine world. D) the money invested ...
January 25, 2010

Social Studies
One of the biggest reasons for the increased European agricultural production in the medieval period was? A) the introduction of a heavier plow. B) the official support of the serfs by the popes. C) the introduction of new crops from the Byzantine world. D) the money invested ...
January 25, 2010

algebra
janice noticed that the number of problems she did for homework (x) formed a linear relationship with her quiz score (y). When she did 3 problems she earned a 25% and when she did 8 problems she earned a 60%. Write an equation to represent this situation.
January 20, 2010

physics
A ball is thrown up with a speed of 30m/s, what is the maximum height reached?
January 20, 2010

how do you find 3 equivalent fractions for 4/9??
January 19, 2010

ENGLISH-POETRY
NEED HELP WITH WRITING A 10 LINE IAMBIC POEM ABOUT WEATHER AND A 10 LINE TROCHIAC POEM ABOUT A PET
January 11, 2010

Physics
A 2 kg mass on a horizontal friction-free air track is accelerated by a string attached to a 100 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 100 kg mass dangles over the pulley, ...
January 9, 2010

Biology
Where do tertiary base pair interactions largely map onto the three-dimensional structure of tRNA? What is their purpose?
December 17, 2009

Biology
Devise an experiment, based on sucrose gradient sedimentation, that would demonstrate that proteins are synthesized on polyribosomes.
December 17, 2009

Biology
What is the difference between enterocolitis and gastroenteritis?
December 11, 2009

my son's homework asked to find each product by factoring the tens on 6x2, 6x20, and 6x200 and to draw rectangles if he needed to. I'm not unerstanding
December 9, 2009

physics
A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 11 m/s. The cliff is h = 55 m above the water's surface, as shown below. How long does it take for the stone to fall to the water?
December 9, 2009

math
equations....4 pennies=4pennies;multiply both sides by 7
December 8, 2009

Math
Find the definite integral of the following using a suitable substitution: 1) (x^2)/sqroot(x^3-1)dx 2)xe^(x^2)dx 3)(ln(x))^(7/2)/(x)dx
December 8, 2009

Math
Find the definite integral of the following using a suitable substitution: 1) (x^2)/sqroot(x^3-1)dx 2)xe^(x^2)dx 3)(ln(x))^(7/2)/(x)dx
December 8, 2009

English
Is this sentence grammatically correct? I would someday like to be half the man my father is.
December 2, 2009

physics
It's because, you the equation is 1/2(K)(x^2) So you change the cm to meters, and then you subtract, getting (.02) then you get (.02)^2, cuz u have to square it, Then you * by K which is 88, and then divide by 2. That gives you the SPE, (spring potential energy)
November 17, 2009

Physics 11
okay thanks alot guyz!
November 16, 2009

Physics 11
I need help on this question 79 g of water at 95 degree Celsius were added to tap water at 22 degree Celsius, and the Temperature of the mixture after all thermal energy transfer ended at 36 degree Celsius. What was the mass of the tap water? (teacher's answer key : 412 ...
November 16, 2009

critical thinking
I need an article from a newspaper or something published between the dats of September 10 2009 till December 4 , 2009. It must be a weak argument that has fallacies and can be refuted by counter examples. For the assignment i need to reconstruct the argument with its premises...
November 14, 2009

science
HOw has the artificial limb improved in efficiency over time since it started being used?
November 13, 2009

Physics 11
In physics we did a lab experiment that involved finding the Heat capacity. the teacher told us that we wont get an exact answer. He wanted us to state the Source of Error. what is a source of Error? He said that it isn't a "human stupidity error" eg. Spilling ...
November 10, 2009

math
3m = 18
November 10, 2009

Algebra
Phoebe is swimming in the ocean, 187 meters out from the beach. She screams for help and starts swimming for the beach at 0.7 meters per second. 15 seconds later Calvin starts toward her in a rowboat, going 1.6 meters per second. Let x be the number of seconds since Phoebe ...
October 25, 2009

The secret of gumbo grove
what is a summary for this book? Answer as soon as possible!!!!!!!!!!!!!!!
October 20, 2009

MATH
MICHAEL(M) IS 1 YEAR OLDER THAN TWICE HIS BROTHER GREGS AGE. IF GREG IS G YEARS OLD, WRITE AN EXPRESSION FOR MICHAELS AGE
October 19, 2009

Science
What would be the origin of endosporeforming bacteria in pepper and other dried foods such as oregano? and.. How would a high number of endosporeforming bacteria in pepper affect the quality and other prepared and vacuum-packaged ready-to-eat foods? I know what ...
October 19, 2009

Grammar
Does this make sense? "I think moms are the best kinds of people"
October 15, 2009

math
the Area of a parallelogram is 60ft2 the height is 5ft how long is the base
October 14, 2009

Biochemistry
The pH of arterial blood is 7.42. When 10 mL of the blood is acidified, 5.91 mL of CO2 is produced. 1) what is the total concentration of CO2 in the blood [CO2]+[HCO3-]? The experimental value for the volume of one mole of CO2 is 22.26 L/mol. 2) What are the individual ...
October 11, 2009

Biochemistry
A person during a 24 hour period produced 1.40 litres of urine containing phosphate at a total concentration of 0.0440 M, at a pH of 6.00. This urine was made in the kidneys by acidifying the phosphate in the glomerular filtrate, which had a pH of 7.40. How much acid must be ...
October 11, 2009

science
I have two questions. I'm doing a crossword puzzle and this is the question. "sometimes scientist make a mistake or ___and need to do the experiment again." The answer is 5 letters and the second to last letter is an O. The second question is "After the ...
October 10, 2009

gr. 8 math
skylar wants to join the local gym. the cost in dollars for a membership can be expressed as: 100+39.99m where 100 is the initation fee in dollars, 39.99 is the monthly fee in dollars, and m is the number of months for which a person signs up. How much will it cost skylar to ...
September 21, 2009

algebra 1
-2/5-7/10
September 15, 2009

This is my intro for my Julius Caesar essay. _____ represents different characters and qualities in the play. Please check any mistakes or awkward phrases thanks Julius Caesar, written by William Shakespeare during the Elizabethan era, is one of the most well-known plays even ...
September 13, 2009

Math
Bridget has a limited income and consumes only wine and cheese; her current consumption choice is four bottles of wine and 10 pounds of cheese. The price of wine is \$10 per bottle and the price of cheese is \$4 per pound. The last bottle of wine added 50 units to Bridget's ...
August 30, 2009

Well, it is not quite English.. But it is an essay on my science project. I was wondering if I could get some help on grammar or awkward phrases. Please fix any mistakes in it ASAP.. Asthma, a multi-factorial disease, is caused by family heredity, which is, passed on from one ...
July 16, 2009

SAT
Is a 480 for math bad? Would the 660 I got on reading componsate for this?
June 22, 2009

Journalism
For my article, I have to look up a company's old address. Is there a website that has archives of the phonebook online? Thanks so much.
June 13, 2009

writing essay english
can you help me to revise this please? The book focuses on nursing through Sue Bauer's life as a patient, grabbing the reader's attention with her experiences and heartfelt thoughts. That's how this book provides an interesting chance to gain perspective, since ...
June 11, 2009

n+3=12
May 27, 2009

ALGEBRA
Thanks Reiny
May 3, 2009

ALGEBRA
how can i graph the inequality 4x+5y is greater than or equal to 20 in a plane? #2 Please help to graph the system of inequalities y is less than or equal to -5 and x is less than or equal to 6 just finishing up an assignment thnaks
May 3, 2009

Social Studies
How did wheat help the U.S. gain wealth and power in the world?
April 30, 2009

spanish
Answer affirmatively ?saludo vd al maestro al entrar en la clase? Si, ...
April 29, 2009

This is my To kill a Mockingbird essay. Please have a look and fix any mistakes or awkward phrases ASAP Thank You Written by Harper Lee, To Kill a Mockingbird is a novel set in a fictional town of Maycomb during the 1930s. In this novel, Lee uses two main characters, Jem and ...
April 27, 2009

math
what is 9*x+6-r+y*p=100
April 20, 2009

Allied Health
Under HIPAA, which one of the following statements is true regarding the release of PHI by covered entities to business associates? A. Covered entities are responsible for the use of PHI made by business associates. B. Covered entities aren’t allowed to release PHI (...
April 20, 2009

Allied Health
A woman in one state is suing a woman in another state for \$25,000. Which one of the following statements is accurate regarding the jurisdiction of the court in which the case was filed? A. The court can exercise personal jurisdiction over the nonresident. B. The court has ...
April 20, 2009

health
The answer is D thanks Ms. Sue
April 20, 2009

Health
1 How do hepatocytes (& Kupffer cells) get access to slow-moving blood? 2 How is bile produced and collected as a fluid separate from blood? Thanks!
April 9, 2009

Biochemistry
Have two quick questions... Why does denatured protein precipitate? (when heated, why does it give that poached egg look? I know heat denatures protein, but why does it look like that? something to do with bonds?) And also... why does protein denature in heat? Thanks!
April 6, 2009

Social Studies
Bad: People began bootlegging and smuggling alcohol from Canada, and brewing/distilling it in their basements. With caused numerous arrests. Good: Less alcohol related accidents and deaths were recorded.
April 1, 2009

Chemistry
Never Mind
April 1, 2009

Chemistry
Suppose 1.0 mol of substance A reacts with 1.0 mol of substance B. to produce 2.0 mol of substance C. In a reaction, 2.4 mol of substance A is allowed to react with 2.1 mol of substance B. What amount in moles of substance c is produced?
April 1, 2009

Chemistry
Calculate the value of the solubility product (Ksp) for CdS given the following standard reduction potentials: CdS + 2e- --> Cd + S-2 E° = -1.21V Cd+2 + 2e- --> Cd E° = -0.402V --------------------------------------- CdS + Cd --> Cd + Cd+2 + S-2 E° = -0....
March 30, 2009

Chemistry
Thank you so much! I was trying to work with wrong E_cell
March 30, 2009

Chemistry
A galvanic cell is based on the following half-reactions at 25C: Ag+ + e- --> Ag H2O2 + 2H+ + 2e- ---> 2H2O (not H2O2) Predict whether E_cell is larger or smaller than E°_cell for the following case. [Ag+]= 1.0M, [H2O2]= 2.0 M, [H+]=2.0M...
March 30, 2009

Biochemistry
Why are the Krebs Cycle and electron transport pathways downregulated during period of high ATP demand? Has something to do with pyruvate and lactate...
March 18, 2009

math
The math problem we need help with is: lbs of can collected by 4 children were as follows: #1 49 #2 72 #3 108 #4 121. the answer is 10. what is the question. where do i start to figure out what the question is their looking for?
March 17, 2009

Science
March 17, 2009

earth scince
What process is mainly responsible for shaping Earth's land surface
March 15, 2009

To Writeacher
In what way is Kreon superstitious?? We can only use the play Oedipus Rex and not the others (eg, Antigone..) so I'm finding a little bit difficult to get a good grasp on Kreon's character. At the end of Oedipus Rex it shows how Kreon is eager to grasp power but I can...
March 9, 2009

Oedipus Rex
Has anyone read this play?? I'm having a little trouble comparing and contrasting Oedipus and Kreon. I need to back up my thesis of Kreon serving as a foil for Oedipus... so far what I have is that Oedipus is a tragic hero by his tragic flaws, mistakes and pride, while ...
March 9, 2009

math
how to convert a fraction to a decimal? 3 - 5 1/50
March 8, 2009

math
how to convert a fraction to a decimal
March 8, 2009

Biochemistry
Is the substrate level phosphorylation (of succinate) spontaneous under conditions that exist in the mitochondria?
March 7, 2009

Biology
What's the purpose of a blank, a postivie control and a negative control?? (say, for an experiement with a spectrophotometer).
March 4, 2009

Biochemistry
Could someone please tell me the effects of anions on enzymes? For example, does anion such as NaCl act as an activator or inhibitor of the enzyme amylase?? I tried google but it just gave me nonsensical scienfitic papers. My reasoning is that it is an inbititor of enzymes ...
March 2, 2009

This is my Art assignment but I just wanted to make sure whether there are any mistakes. Please help! Reading or evaluating the visual images around us is a critical skill to have in our lives. By looking at different images and sculptures, people can evaluate and discover the...
March 2, 2009

bible charater
500 begins it 500 ends it 5 in the middle is seen first of all letters first of all numbers
March 1, 2009

government
Words that mean "Equal Justice Under the Law" Is there such a thing or do they just want words that relate to it?
February 26, 2009

ecology
what causes the buildup of a river delta
February 17, 2009

Biochemistry
I need to copare and contrast gel electrophoresis and paper strip electrophoresis... I know what both of them are, but I need to explain in terms of the charges on the proteins.. and I need to describe the polyacrylamide gel electrophoresis method in terms of mobility??????? ...
February 12, 2009

Physics
A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of 0.37 s, and the top-to-bottom height of the window is 2.20 m. How high above the window top did the flowerpot go? S= ut +(1/2)at^2 S= (0)(0.215) + (0.5)(9.8...
February 12, 2009

Physics
A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of 0.37 s, and the top-to-bottom height of the window is 2.20 m. How high above the window top did the flowerpot go? S= ut +(1/2)at^2 S= (0)(0.215) + (0.5)(9.8...
February 11, 2009

Chemistry
February 9, 2009

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