Questions Asked on
March 30, 2009

Chemistry
A galvanic cell is based on the following halfreactions 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
asked by Andrew 
CHEM..URGENT!
What is produced at each electrode in the electrolysis of NaBr(aq) and AgF(aq)?
asked by H 
math
Books Never Written?
asked by Bella 
PreCalculus
Problem: Identify the conic from the equation 13x^26(sq.rt.6)xy+7y^216=0 I have to choose from the following four answers: hyperbola (angle of rotation 45) hyperbla (angle of rotation 60) ellipse (angle of rotation 90) ellipse (angle of rotation 30) I
asked by Joanie 
PreCalc
Establish the identity. sinx + cosx/sinx  cosx = 1+2sinxcosx/2sin^2x1
asked by Brittany 
Spanish #2
Can someone please check my work? Julián describes his family/. Complete the paragraph using possessive adjectives/. La hijas de mi tía son (mis) primas. Una se llama Noemí y (sus) hermanas se llaman Rosario y Débora. (Nuestras) madres son hermanas.
asked by Larry 
chemistry
For the reaction that occurs in the voltaic cell, Fe(s)Fe2+(aq)Cr3+(aq), Cr2+(aq)Pt(s) determine E°cell. I don't understand how the Pt(s) would be used to solve this question. Please help!
asked by Hannah 
Calculus
This is the question  you are designing a rectangular poster to contain 256 in^2 of printing with a 3 " margin at the top & bottom and a 2 " margin at each side. What overall dinmensions will minimize the amount of paper used? Round to the nearest whole
asked by Jane 
Religion
What movie(s) could one show illustrating the Moral Development Theory by Lawrence Kohlberg?
asked by Tara 
math
A coffee shop sells a ceramic refill mug for $8.95. Each refill costs $1.50. Last month Rose spent $26.95 on a mug and refills. How many refills did she buy? THIS IS AN EQUATION
asked by sara 
Spanish
Can someone please check my work? Use possessive adjectives to write complete sentences about Miguel's family. Follow the model. modelo: tú/padres/ser/simpáticos: Tus padres son simpáticos. 1. yo/hermanos/ser/altos: Mis hermanos son altos. 2.
asked by Larry 
social studies
what was some of the point of view on slavery back in the 1850s?
asked by queeneka 
Math
A farmer grows only sunflowers and flax on his 240acre farm. This year he wants to plant 80 more acres of sunflowers than that of flax. How many acres of each crop does the farmer need to plant?
asked by Angie 
Chemistry
Calculate the value of the solubility product (Ksp) for CdS given the following standard reduction potentials: CdS + 2e > Cd + S2 E° = 1.21V Cd+2 + 2e > Cd E° = 0.402V  CdS + Cd > Cd + Cd+2 + S2 E° =
asked by Andrew 
Pre Cal.Check my work?
Solve the system of equations: x  y  z = 2; x + 2y  2z = 3; 3x  2y  4z = 5? well, you have: 1 xyz=2 2 x+2y2z=3 3 3x2y4z=5 multiply both sides of the equation 1 by 2: xyz=2 ===> 2x2y2z=4 add this by equation 2: 2x2y2z=4 x+2y2z=3 ==> 3x 
asked by David 
calculus
Could someone help me et up this problem? Two people start from the same point. one walks east at 3mi/h and the other walks northeast at 2mi/h. How fast is the distance between the poeple changing after 15 minutes? I think this is what I would do::: First
asked by Anonymous 
Science
what does the geologic time scale indicate about the change in lifeforms over time?
asked by lyne 
Algebra 2, Grade 10
How do you solve 4x^861x^4+225????
asked by Resse 
Spanish
Please help me translate. Dear Juan, If you do not want your girlfriend to leave, you need to listen to me carefully. You were wrong. In a relationship, no matter the situation, the guy is always wrong. Be a man and tell her you made a mistake. I am sure
asked by Robert 
Calculus
Here's one more that I do not understand A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .0002x^2 Find the production level that minimizes the average cost per unit. Thank you so much
asked by Jane 
Economics (attempted as suggested by economyst)
Posted by eStone on Sunday, March 29, 2009 at 5:47pm. Suppose that a firm is currently employing 30 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed
asked by eStone 
Cal Word Problem
Use a(t)= 9.8 meters per secondas the acceleration due to gravity.(Neglect air resistance) The Grand Canyon is 1800 meters deep at its deepest point. A rock is dropped from the rim above this point. Write the height f the rock as a function of the time t
asked by Sarah 
Massmass
How many grams of hydrogen gas are produced when 50.0 grams of zinc react with phosphoric acid, H3PO4 ? Equation:3 Zn +2 H3PO4>3 H2+ Zn3(PO4)2
asked by robb 
social studies
lession 1 north and south grow apart whao I have to do is compare and contrast. I have some of it done but I can't fine what is the similar and different?With the way of lift in the 1850. point of view on tariffs in imported good. And point of view on the
asked by queeneka 
Chemistry
When a sample is above critical temperature and above critical pressure, it is a supercritical fluid. What happens when a sample is above critical temperature but below critical pressure? What phase is that? What happens when a sample is above critical
asked by Sean 
Literature
A few more questions on Antigone; Can someone please check my answers?: 1. When Ismene and Antigone disagree in the first scene, Ismene says "You are unwise but a loyal friend indeed to those who love you." Is it an accurate picture of Antigone? Why or why
asked by mysterychicken 
11th grade Chemistry
[molemole] How many moles of NaOH are needed to react with 5.0 moles of sulfuric acid, H2SO4??? Equation: H2SO4 + 2 NaOH > Na2 SO4 +2 H2 O
asked by Jenny 
Sra
Are you going to be on for a lil bit more? Around 12 hours now from this post? I really need help with some french, but I have to do some other homework first. I'll check on your reply in a bit. Merci beacoupe.
asked by Chopsticks 
us history
what factor encouraged an american policy of neutrality during the 1930's?
asked by Anonymous 
science
what type of spectrum does the sun emit? where does nuclear fusion in the sun occur? if a star begins its evolution with 10 times the mass of the sun, but ends up with 2 times the mass of the sun, what type of object does it form?
asked by bo 
Physics
Find the energy necessary to put 5kg , initially at rest on Earth's surface, into geosynchronous orbit. Do I use the formula U=GMm/r G=6.67*10^11 M=2.5*10^24 m=5 r=41000 Is this sort of right, any help would be greatly appreciated. Do i have to add the
asked by Malcom 
Find the number of moles
67.6g of h2O
asked by Ashley 
Biology
Compared with a smaller cell, a larger cell of the same shape has a. the same surfacetovolume ratio. b. a smaller cytoplasmtonucleus ratio. c. less surface area. d. a smaller average distance between its mitochondria and the nucleus. e. less surface
asked by Cell size and shape 
social studies
louisiana purchase
asked by bob 
Algebra
Explain how you would determine whether the graph of y = x^4 represents an exponential function. What is an exponential function? Thank you! :)
asked by Cassie 
Econ
In which of the following circumstances would a buyer be indifferent about buying a good? a. The amount of consumer surplus the buyer would experience as a result of buying the good is zero. b. The price of the good is equal to the buyer's willingness to
asked by Rob 
Chemistry
A student carried out the synthesis of aspirin, starting with 3.22 g of salicylic acid. After carrying out the reaction, recrystallizing and then drying the product, the student obtained 3.65 g of aspirin. Calculate the percent yield. I'm pretty sure it's
asked by John 
Math
There 1170 students in a school. The ration of girls to boys is 23:22. The system below describes relatioonships between the number of girls and the number of boys. g+b=1170 g/b=23/22 a. what's the proportion for g when you solve it? b. how do you solve
asked by Angie 
poem
limeric There once was a boy named Timmy. His brothers were all named Jimmy. They all got confused. This name was misused. They all ganged up and beat Timmy. Is it right poem for limeric check my spelling too thanks.
asked by jouan 
Physics
Find the energy necessary to put 5kg , initially at rest on Earth's surface, into geosynchronous orbit. Do I use the formula U=GMm/r G=6.67*10^11 M=2.5*10^24 m=5 r=41000 Is this sort of right, any help would be greatly appreciated.
asked by James 
5th grade english
anagram
asked by muthu 
math
9xyxy+7y6y= 10xy+y
asked by ferrer 
Spanish
I am trying tos ay In general there is nothing wrong with trying to look young. Understanding that you must look young with class understanding your age. There is no reason to hurt yourself just to feel young. You are only as young as you feel I think.
asked by Toya 
Stoichiometry
[VolumeVolume].How many liters of HF gas will be produced when 30.0 liters of hydrogen reacts ? Equation:h2+f2>2HF i need help
asked by Dom 
Science
How would you test for Carbon Dioxide?
asked by Bella 
Chemistry
What does a high ENC indicate if we are comparing two compounds for example Csl and CaCl2? To caculate the ENC we simply take the number of valence electrons of the two compounds? Please help
asked by Cindy 
alg 1
factor 3x^2y9xy^2
asked by Coty 
Physics
A force of 240.0 N causes an object to accelerate at 3.2 m/s^2. What is the mass of the object? 0.013 kg 75 kg 240 kg 786 kg
asked by Tiara 
Electromagnetism
**define any of the following** 1.magnet 2.poles 3.magnetic force 4.electromagnetism 5.solenoid 6.electromagnet 7.electric motor 8.electromagnetic induction 9.generator 10.transformer
asked by **8th Grade** 
calculus
I need help with this problem. I think I figured out how to set it up but I keep getting stuck in the middle. A boat is pulled into a dock by a rope attatched to the bow of the boat and passing through a pulley on the dock that is 1m higher than the bow of
asked by Anonymous 
8th Grade Algebra
You know how to solve quadratic equations using algebra, graphs and the quadratic formula. Sometimes one method of solving is more convenient than another method. Describe how you would solve each equation. Give reasons for you answers. A) 16x^2 = 1600 B)
asked by Joy 
Chem
what are the four quantum numbers of the last electron of As this is what i have n=4 l=1 ms= 1/2 i don't know how to calculate ml. I know it's either: 1,0,1
asked by Laura 
12th grade chemistry
Calculate the number of grams in the following :[149.096 g/mole] 8.55 moles of (NH4)3PO4 IT WOULD BE NICE IF I CAN GET STEP BY STEPS TO GET ANSWER !!!
asked by Janice 
Biology
Suppose that during meiosis I, the paternal chromosomes always went to one pole and the maternal chromosomes always went to the other pole. How would this affect the genetic variability of the offspring? Would children tend to look more like the parents?
asked by Patricia 
CHemistry
Research the role of chemistry within a specific industry. Identify chemical processes upon which the industry relies. Explore environmental impacts of the industry that are related either to the chemicals it uses or produces. Procedure Choose one of the
asked by Tom 
Business Cover Letter
Write a business letter of two to three paragraphs based on the scenario described here. Write an application letter in answer to the ad below. You may make up details but do not copy directly from sample letters in the study unit or any other source. Your
asked by Anonymous 
Socials Studies Project
Okay, I have to do a project on First Nations. The group I'm researching are the Northwest Coast People. It must include: Lifestyle (clothes, food and its preparation, types of housing, transportation, agriculture, nomadic, hunters, fisherman?) Customs and
asked by Larry 
Julius Caesar
What is Cinna's connection to Brutus in the play? I understand his role in the story, I just don't get how he connects to Brutus. Thank you for explaining this.
asked by Michael 
Accounting Ethics: Keeping it Clean.
What did Arthur Andersen contribute to the Enron disaster? I have read about this and I am having trouble understanding it.
asked by A.W. 
us
hi i have to write a paper stating that malcolm x was a better leader than martin luther king jr. I need a lot of help
asked by ben 
Math
I am having problems understanding how to solve problems like the following: a2 + b2 = c2 Please help me where I can understand solving problems such as the one above.
asked by Jasmine 
science someone help me pleaz!!!!!!!!
if a white dwarf can exist only if its mass is less than 1.4 times the sun's mass, how can a star having 5 times the sun's mass end as a white dwarf? & what can astronomers learn about a star from its spectral lines?
asked by mike 
Science
how did geologists determine the divisions of the geologic time scale?
asked by lyne 
Chemistry
A 67gr mass of solid iron is heated by a flame until the temp of the iron equals the temp of the flame. The solid iron is then dropped into 250gr of liquid water at 26 degrees C. After 5 mins, the iron and the water are both at 47 degrees C. Specific heat:
asked by Lacey 
8th Grade Algebra
1) A firefighter aims a hose at a window 25 ft. above the ground. The equation h = 0.01d^2 + 1.06d + 5 models the path of the water, when h equals height in feet. Estimate, to the nearest foot, the horizontal distance d in feet btween the firefighter and
asked by Nancy 
Math
For this system, is the ordered pair a solution of both equations?How do you know? (5,1) y=x+4 y=x6
asked by Angie 
english
please help me tell which of the following would be better as a thesis statement for a rescreach paper " Poverty". addtional suggestion will be appreciated. thank you!!!  Poverty is affecting thousands of Americans everyday, it isn't sparing anyone of a
asked by Anonymous 
English
I am currently reading Jack London's short story "To Build a Fire." On my study guide, I was asked "What is the one important element beside matches that the man needs to build a fire?" I would say oxygen, but I don't think this is it, because the book
asked by Emmaline 
Chemistry
Do a cation of Mg^+2 and an anion of CO3^2 become Mg(CO)3 or magnesium carbonite? What about (NH4)2 SO4. What cation and anion does that become? I'm not seeing why SO would get 4 if it already has that to begin with. Thank you!
asked by Emmaline 
Dr.Bob22
Can you please verify the anwer I gave robb under his chemistry post called "massmass". I probably did something wrong.
asked by Chopsticks 
Physics
The escape speed from a planet of mass 2.5×10^24 is 7.0 km/s.What is the planet's radius? Iam using the formula v=sqr(2GM/r) v=7 G=6.67*10^11 M=2.5*10^24 r=? I get 6.8*10^12 Where did I go wrong?
asked by James 
art survey
describle the values of studing the visual and performing arts.
asked by tonya 
statistics
Listed below are the number of homeruns for the National League leader over the last 20 years, through 2006. Assuming that number of homeruns is normally distributed, if this is sample data collected from a population of all past and future homerun
asked by delanour 
vocabulary
Whats an word for everyday language? not english. a vocab term
asked by Alan 
Calculus
There was a typo in last question A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .002x^2 Find the production level that minimizes the average cost per unit.
asked by Jane 
science
does the doppler shift provide complete information about the motion of a star? pleazzz help
asked by mike 
chemistry
Describe what happens to the shape and volume of a solid, a liquid, and a gas when you place each into separate, closed containers?
asked by chrissy 
science
if a white dwarf can exist only if its mass is less than 1.4 times the sun's mass, how can a star having 5 times the sun's mass end as a white dwarf? & what can astronomers learn about a star from its spectral lines?
asked by mike 
spelling
Fill in the blanks with nouns: adm_r_l , sq_ _rr_l , _l_v_t_r
asked by Anya 
6th Grade Math
Carmen received some money for her birthday on Friday. That night, she took her friend out to dinner. She spent half of her check for dinner. Then she tipped the waiter $6. The next evening she went to dinner alone, she spent half of the money she had
asked by Brandi 
english
i need help with making an analogy! i just don't know how to do one like is seed is to water as plant is to flower one ? but i need a different one then that one help please!!!!!!!
asked by Yvette 
Speech/english
ok my topic is If you could do anything without getting in trouble what would it be. we have to write an introduction first then thesis for my introduction i keep confusing that with the body i think i'm a little confused with what that should be about but
asked by jerson 
Help with Translation
Please help me translate this short letter. Dear Juan, If you do not want your girlfriend to leave, you need to listen to me carefully. You were wrong. In a relationship, no matter the situation, the guy is always wrong. Be a man and tell her you made a
asked by Robert 
Physics
In order to handle a hot pizza of mass 1.0 kg, a cook slides a light (i.e., of negligible mass) but stiff spatula of length 2.0 m from the right hand to the center of the pizza, which he then carries horizontally with both hands. His right hand is at one
asked by Mary 
math
how do u find unit rates and how would u round it to the nearest hundreth is it is necessary???
asked by ashley 
7th grade
Thanks for the websites still a little confused on what animals would be considered a renewable resource?
asked by Brooke 
History
This is what I have so far but I need to add more any ideas would be great. Thanks. (How does overpopulation cause epidemics) THe more people that one comes in contact with each day, the more chances there are to pass on or receive a contagious disease.
asked by Kara 
Econ
A result of welfare economics is that the equilibrium price of a product is considered to be the best price because it a. maximizes total revenue for firms and maximizes the quantity supplied of the product. b. maximizes the combined welfare of buyers and
asked by Rob 
math
if the rate for radioactive decay for a substance is r=.0063 and time is being measured in days how do you find the halflife of the substance to the nearest hour?
asked by mike 
Solving inequalities
I have to solve the following inequalities: x^2 + y^2 is less than or equal to 49 y is less than or equal to 3x^2 I know that these are the equations of a circle and a parable. There should be 3 solutions. However, I am not sure how to solve these
asked by Joanie 
physics
A straight ladder is leaning against the wall of a house. The ladder has rails 4.50 m long, joined by rungs 4.800 m long. Its bottom end is on solid but sloping ground so that the top of the ladder is 3.400 m to the left of where it should be, and the
asked by Jessi 
math
how would you prove that (cos^2xsin^2x)(1cos^2xsin^2x)= (cos^6sin^6)?
asked by kim 
Chemistry
Explain in detail, which of the following pairs would have a higher melting point NH3 or P4
asked by Sara 
science
if a white dwarf can exist only if its mass is less than 1.4 times the sun's mass, how can a star having 5 times the sun's mass end as a white dwarf? & what can astronomers learn about a star from its spectral lines?
asked by mike 
madern tegnology
find out how modern tegnology has proved new means by wich people may save money. P.S i really don't understand and this is part of a project that is due tomorrow ANd i really need the answer before 9:30 tonight... thank u
asked by wow146 
History
How would overpopulation create epademics?
asked by Kara 
Algebra
Describe how an exponential function changes as the base increases. What is an "exponential function" and how would I find the answer? Thank you! :)
asked by Cassie 
Reading
Secret Pal Surprises Characters and Setting? It is for my book report. Please tell me the characters (behavioral description) and where's the setting.
asked by Erin 
Algebra
Explain how population and money earning interest can both be represented by the formula A = 1000(1.08)^t. I have no idea how to solve this problem or how to start! Thank you! :)
asked by Cassie 
math
There is a total of 37feet of lumber. You may use as much of this as you need. Your class has raised $121.00 to buy sand. A bag of sand costs $ 1.50. One bag will cover an area of one square foot. What is the largest sandfilled area you can make for the
asked by Vidya 
4th grade
how does the cycle of day and night of our earth work?
asked by breanna 
Literature
I had a couple of questions about Antigone. 1. Teiresias says to Creon that "A good man yields when he knows his course is wrong and repairs the evil." How does this apply to Creon? I think Creon does this in the end but I need a more detailed answer; I
asked by mysterychicken 
5th grade math problem
There is a total of 37feet of lumber? You may use as much of this as you need. Your class has raised $121.00 to buy the sand. A bag of sand costs $1.50. One bag will cover an area of one square foot. What is the largest sandfilled area you can make for
asked by Vidya 
Math Challenge
Please help, even if you only know 1 answer. 1. The length of each side of rectangle R is an integer, and the area of R is 2009. What is the largest possible perimeter of R? 2. If i place all three operational symbols +, , x, in all possible way into the
asked by annon 
math/equations
1 7=7d8 2 24+h/4 =10 3 k/5 13=4 4 17+q/8=13 CAN ANYONE HELP!
asked by sara 
7th grade
Thanks so much for all of your help Ms.Sue.
asked by Brooke 
science
why do carbonated drink errode the iron nail? thank you.
asked by al 
math
if a number is evenly divisible by 6, it is also evenly divisible by which other numbers?
asked by laura 
Algebra
I need to simplify this. (2^1 . 7^4)^2 I thought that 2 was suppose to be multiplied with the 1, but that doesn't seem to make sense so I am confused. I know that PEDMAS needs to be used, just don't know how to apply it. Any help is appreciated!
asked by Alicia 
3rd grade
in the book " how to be cool in the third grade. Do you think Robbie was cool and why
asked by carmen 
Science!!
Hi!! Which sentence looks better? (Should the commas be there?): 1. Extra food that your body doesn’t need or can’t digest travels into your large intestine & is turned into waste & eliminated from your body. 2. Extra food, that your body doesn’t
asked by ~{Happy Face}~ 
Math
Factor (m + 4) (a – 5) + (m + 4) (a + 3) I cut it down to 2 possibilities. (m + 4) (2a – 2) (m + 4) (a2 – 2) Think it's this one
asked by Laurie 
Math
20 cm equals how many mm?
asked by Barbara 
Electronic Engineering
What are the advantages and disadvantages of using a cause register or vectored interrupts from a hardware point of view.
asked by Rachel 
biology
what is the stages of mitosis?
asked by megan 
banking
how would you receave interest on money if you keep it in a bank??????????
asked by wow146 
science
what is gu?
asked by loen 
Algebra
Please simplify. 5x^2  3y 1/ OVER x^1 + y^1
asked by Rachale 
Improving Your Writing
Ten years ago, I started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted me to office manager. I manage two employees: Jack Snyder and Ruth Disselkoen. My office provides secretarial support
asked by Vickie White 
sci 230
What is a Theory? and Fake Science ?
asked by meshelle 
2nd grade
what is an 8th of an inch?
asked by Dylan 
math
8Xa squared b _________________________ 5Xa fifth power b
asked by ferrer 
math
a fifth power b ____________________all in ()to 3 a seventh power b 2
asked by ferrer 
math
3a29ab+4b27ab=
asked by ferrer 
Math/Algebra
Does anyone know how to graph quadratic functions (with parabolas). Could someone please help me!!Could you help me with these two problems don't forget to make a chart for x, the equation, the y, and the coordinates. 1. Y=2x^2 2. Y=5x^2
asked by Smores 
math{need HELP}
what is 5 pecent out of 5200?
asked by ???knowme??? 
Meaning
What does a quarantine area mean?
asked by Justin 
science
how do you find the wet bulb depression if they don't give any other info.
asked by kyle 
math
when question ask subtract (5y+8y+2) from (7y+9y8) which expression comes first
asked by ferrer 
algebra
I have tried to work these problem and seem to do it wrong.I need help. 3/4(5x1/2)5/3
asked by Elaine 
math
what is 4% of $300.00
asked by popcorn lover 
English
What is a better of way of saying : for that reason in a more academic tone.
asked by Lou 
Language
we watched the eclipse from are backyard
asked by Mikah 
7th grade
Does anyone know if Aloe would be considered a renewable resource for aruba. Still having a hard time finding anymore ecspecially animals.
asked by Brooke 
Calculus 1
Evaluate and compare Change in Y and Change in dy. Y = 12X^2
asked by Sarah 
Challenge Problems  Math
Please help, even if you only know 1 answer. 1. The length of each side of rectangle R is an integer, and the area of R is 2009. What is the largest possible perimeter of R? 2. If i place all three operational symbols +, , X in all possible way into the
asked by D 
math10th grade( quadractics)
the centre point of a circle is 5,3. the top most point of the circle is the vertex. the radius of the circle is 5 and one of the zeroes is 9. figure out the vertex. tehn figure out the equation and convert it in standard form? p.splz exaplain step to
asked by Redspider 
physics: relativity
I think I can rearrange the Lorentz contraction equation, solving for v using: v=sqrt[1(L/Lo)^2] x c^2 Would someone check my thinking please? Thanks
asked by charlie 
math
how do i solve the 2 step equations 45m/30=165
asked by sara