Friday
August 22, 2014

Search: Calculus - not sure if my work is correct?

Number of results: 55,142

Physics conceptional question Please help
Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and there will be no current...
April 24, 2013 by Sheila

math- help again please
An employee earns $7.00 and hour for the first 35 hours worked in a week, and $10.50 for any hours over 35. One paycheck (before deductions) was for $308.00.How many hours did the employee work? Let t denote the overtime hours. Then you know that if the employee made more than...
October 18, 2006 by pinkpolkadots

math-Ms. Sue
ms Sue I was not sure how to do a response to you but my prior question was the following and you had answered to take the total number of students and make this the denominator and the history majors the numerator which I did and makes this 300/1225 so then to get the ratio ...
September 24, 2010 by m

Precalculus
There are 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The diagram has 4 rectangular corrals attached together but fencing is not needed on the back wall of the barn. The barn is above the 4 rectangular corrals...
October 5, 2012 by Cole

Biology
This is a choose the best answer question: The location of protein synthesis in eukaryotic cells is the a)nucleus. b)cytoplasm. c)plasma membrane. d)Golgi apparatus. d)vacuole. Ok so I know that the sites for protein sythesis are the ribosomes and there are ribosomes on the ...
September 22, 2011 by Kara

Biology
This is a choose the best answer question: The location of protein synthesis in eukaryotic cells is the a)nucleus. b)cytoplasm. c)plasma membrane. d)Golgi apparatus. d)vacuole. Ok so I know that the sites for protein sythesis are the ribosomes and there are ribosomes on the ...
September 22, 2011 by Kara

Calculus
The area of a circle is changing at a rate of 2 in.^(2)/sec. At what rate is its radius changing when the radius is 9 in.? a. (9/2)in./sec. b. (2/9)in./sec. c. (2/9pie)in./sec. d. (1/9pie)in./sec. e. (1/9)in./sec.
September 22, 2011 by Angel

calculus
Find the average value of the function f(x)=8x^2-5x+6 , on the interval [3,5]. Find the value of x-coordinate at which the function assumes it's average value. what is the average value = to ? what is the x coordinate = to ? Thanks
December 3, 2011 by li

math
To solve 3/4 divided by 2/5, Elisha writes, 3/4 divided by 2/5 is the same as 15/20 divided by 8/20. So the answer to 3/4 divided by 2/5 is the same as 15 divided by 8. Is Elisha's first claim, that 3/4 divided by 2/5 is the same as 15/20 divided by 8/20, correct?
October 30, 2013 by anonymous

calculus
Let M=1000. Which of the conditions is equivalent to f(x)= 1/((4x-12)^2)>M? a. absolute value of (x+3) is greater than or equal to .00158 b. absolute value of (x+3) is greater than or equal to .0553 c. absolute value of (x-3) is less than .00791 d. absolute value of (x-3) ...
September 14, 2011 by Brian

science e.m.f.?
please expain to me what is e.m.f. e.m.f. stands for electromotive force. It is the work done per unit charge (Joules per Coulomb) by an electric field when electric charge goes from point A to point B. It is measured in Volts. 1 Volt = 1 Joule/Coulomb If A and B are points in...
January 17, 2007 by minerva

math
A long-distance phone call costs $0.84 for the first minute and $0.58 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $6. Let N be the number of minutes. Write an expression for the ...
May 7, 2007 by veronica

math 117
A garden area is 30 ft long and 20 ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400 ft2, what is the width of the path? using the quadratic formula I did the following: Let x = distance between the inner rectangle and the outer ...
August 9, 2007 by Diana

Grammar and Composition
please help me with this && check what i have: List 10 verbs for the word "said" that make it more specific. 1. supposed 2. whispered 3. told 4. spoke 5. believed 6. announced 7. claimed 8. conveyed 9. mentioned 10. told List 10 nouns for the word "building" that make it more ...
October 16, 2009 by y912f

Physics
Collapsible plastic bags are used in hospitals for infusions. We want to use such a bag to infuse a electrolyte solution into the artery of a patient. For this we mount the bag at a height h above the arm of the patient. Assuming that the particular gauge pressure in the ...
November 25, 2009 by Sam

AED 201
How do such rewards influence recruitment or retention? This is what I have for internal and external rewards that affect recruitment and retention of qualitiy teachers. Internal rewards-the satisfaction a person gets from teaching and helping children learn. External rewards-...
March 22, 2010 by Rayna

mgt 435
Compare and contrast two organizations within a particular industry and discuss how and why one organization kept pace with comsumer expectations and the other organization did not. I'm not looking for someone to do the work for me but what I am looking for is help with the ...
April 20, 2011 by Anonymous

Finance
Benson Incorporated has bonds with the following features: Par value of 1,000, maturity of 12 years, and a coupon rate of 8%.The yield to maturity is 10%. Pleases determine if the bond sells for for a premium, par, or discount and explain your answer. Calculate the value of ...
August 20, 2011 by Mybenz

physics
Olympic swimmers can swim at a speed of 1.7 m/s. If an Olympic swimmer were swimming in the ocean on a day when the wavelength of the waves was 20m and the frequency was 1 Hz, would the swimmer be able to swim fast enough to avoid being lifted by a wave? Show your calculation...
January 25, 2012 by Jon

physics
Olympic swimmers can swim at a speed of 1.7 m/s. If an Olympic swimmer were swimming in the ocean on a day when the wavelength of the waves was 20m and the frequency was 1 Hz, would the swimmer be able to swim fast enough to avoid being lifted by a wave? Show your calculation...
January 25, 2012 by Jon

Math
1. You need $200,000 to retire in 10 years. You can invest monthly amounts at 5% APR at work. How much should you contribute each month? 2. A friend creates an IRA with an APR of 6.25%. She starts at age 25 and deposits $50 per month. a) How much will her IRA contain when she ...
November 14, 2013 by Kim

Chemistry
I had to perform an experiment using a coffee-cup calorimeter to determine the enthalpies of two seperate reactions. For part 1 we worked with magnesium metal, and magnesium oxide. Data was collected and now I need to find the q, heat transferred for both magnesium and ...
February 13, 2012 by Hannah

physics
a) A set of crash tests consists of running a test car moving at a speed of 12.6 m/s (27.7 m/h) into a solid wall. Strapped securely in an advanced seat belt system, a 69.0 kg (151.8 lbs) dummy is found to move a distance of 0.600 m from the moment the car touches the wall to ...
February 27, 2012 by Katie

CHEMISTRY ANYONE THAT CAN HELP!!!!!!!!!!!!!!!!!!!
and we had to round this was the question was to again calculate the number of moles in each of the following masses a)64.1 g of aluminum b)28.1 g of silicon c)0.255 g of sulfur d)850.5 g of zinc a) 64/27 = 2.4 mols b) 28.1g/28=1.0 mol c) 0.255/32=.0080 d)850.5/65 =13.076. I ...
February 20, 2008 by john

physics
hi- I have a problem I can't seem to get right. here it is. "A retired bank president can easily read the fine print of the financial pages when the news paper is held no close than arm's length, 66.4 cm from the eye. What should be the focal length of an eyeglass lens that ...
June 8, 2008 by Ty

Chemistry
Nitric Acid is produced from nitric oxide, NO which in turn is prepared from ammonia by the ostwald process. 4NH3 + 5O2 -----> 4NO + 6H2O What volume of oxygen at 35 degrees C and 2.15 atm is neeeded to produce 50.0 g of nitric oxide T= 273+35 = 308 K P = 2.15 atm n= 50.0 g...
October 23, 2007 by Lauren

Spanish
I need help understanding how to ask/answer questions using the word 'Que'. If the question is ?Que' estudias tu'? is the correct answer: 'Yo estudio ___' and then whatever you're studying or could I simply answer 'Estudio ____' Also, in these questions, does one add the ...
May 5, 2009 by Kara

chem
Equal volume of a 0.02 M Zn+ solution and a 2.0M NH3 solution are mixed. Kf for [Zn(NH3)4] is 4.1*10^8. If enough sodium oxalate is added to make the solution 0.1 M in oxalate, will ZnC2O4 precipitate. Ksp ZnC2O4= 2.7*10^-8. I set up an ICE table which have me: Kf= (Zn(NH3)4...
August 10, 2009 by Sara

English
Color of Our Friendship Friendship is full of colors. Red is action. It makes us feel active. Yellow is happiness. It makes us feel happy. Gray is age. It keeps us living harmonously together. Friendship is full of colors. (It is a poem I made. Would you check the poem and ...
August 24, 2009 by John

Math
The voltage in a circuit is given by the formula V = 16t3 - 79t. Find the values for t for which V is a maximum or a minimum. larger t in seconds = smaller t in seconds = My Answer: V=16t^3-79t V'=48t^2-79 0=48t^2-79 Sq root of 1.645833 = t 1.2829= t V''=96t positive therefore...
January 29, 2013 by Ashley

science
If the block has a mass 12.3 kg and slides a distance of 6.9 m down the inlcine, calculate the distance x the spring is compressed if the coefficient of kinetic friction between the block and the incline is 0.3 and the spring constant is 17.4 N/m. Input your answer as a ...
March 14, 2013 by xolani

Math
Can someone explain what to do for the following question. What percentage of a normal distribution is greater than the mean? Give your answer correct to the nearest percent. What formula is used? Because I have to find also 1 standard deviation of the mean and what percentage...
May 22, 2013 by Sue

ks maths
2x - 4y = 12 3x + 2y = 10 whats the answer Do you know how to solve simultaneous equations? Multiply equation (2) by 2, then add eqution 1 to eqution 2. That process gets rid of the y term. Then solve for x. Substitute the value of x into either equation and solve for y. I ...
July 15, 2006 by Me

socials
Question:Hey I posting for my brother Mohammad again, his computer not work I not know why. You please unblock any people so he access again. His question. What goals of the FLQ. Me him not know if list goal one by one. We only have to achieve Quebec independence by resorting...
December 14, 2011 by Shreya

physics
A pushes with force of 300 N at 25 degrees. B pushes with force of 275 N at 160 degrees. C pushes with force of 325 N at 300 degrees. Find resultant force. I got 187 N at -19 degrees or 161 degrees. Correct? or could you explain more please? Thank you.
November 7, 2010 by Anonymous

Predication
A book that has an exciting introduction and a surprising ending would be the best story for me to read. (Broken Link Removed) Be sure to read the first sentence very carefully -- then read the rest. I think the problem in this sentence is with the linking verb (would be). How...
May 18, 2007 by Anonymous

English - Ms. Sue
For my slideshow I had wrote down - - Jake draws away from everyone. But corrected it to withdraw, so would that be like - -Jake withdraws away from everyone, or Jake withdraws from everyone? I also wrote - - to act positive and move on, but she corrected me and said ...
February 22, 2012 by Aaron

Chemistry
Calculate the percent yield of iron if 950 g of Fe3O4 underwent the reaction shown in the chemical equation below and 533 g of Fe was isolated from the reaction mixture. Fe3O4 (s) + 2 C(s) ----> 2 CO2 (g) + 3 Fe(s) 1). 25.9% 2). 77.5% 3). 56.1% 4). None of the above. Based ...
April 11, 2007 by Van jan

statistics
for a particular sample of 77 scores on a psychology exam, the following results were obtained: first quartile=44, third quartile= 71, standard deviation=6, range=45, mean=64,median=57, mode=32, midrange=60 a)according to chevyshev's theorem how many students scored between 48...
October 17, 2010 by mary- please show correct calculations

maths(urgent....please...)
1) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance. i have posted the same question earlier and i got some ...
April 12, 2011 by arun

Spanish
Complete each sentence with the correct form of the appropriate verb. Each verb will be used only once. hacer beber escribir compartir vender 1.Tú siempre agua después de correr. 2. Yo siempre la tarea después de las clases. 3. La cafetería unas hamburguesas muy ricas. 4. ¿...
May 11, 2011 by Bobby

Business Communication
If an audience is opposed to what you have to say or resistant to change you are suggesting, a good approach is to: A. Be as ambiguous as possible to avoid offending the members of the audience B. Begin the message with something both you and the audience can agree upon C. Try...
January 10, 2014 by Minnie

Spanish 2
Fill in the blank with the correct form of the present perfect. You do not need capital letters or accents for this. 1.) Los chicos_____hecho la tarea. 2.) Maria ____ ____ (limpiar) 3.) Usted ha ____(ver) la pelicula? 4.) Yo he ____(comer) los tacos. 5.) Nosotros _____leido el...
May 1, 2014 by Lanie

Help 5!!!
5. Find the x and y intercepts of each linear equation. Be sure to write your answers as ordered pairs. y = 3x - 6 6y = -x + 2 On the second equation, change it to read y= ...,. Divide both sides of that equation by 6 to get the desired result. how?? The first one has slope m=...
October 13, 2006 by Margie

grammar
Do you think there needs to be a comma in this sentence or is the 2nd one correct? 1a. Students, who study hard, should do well on the test. 2a. Students who study hard should do well on the test. Or the more I read it the more the first one sounds better!
November 30, 2008 by Dorothy

chemistry
As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered? a.Liquid, solid, gas b.Gas, solid, liquid c.Solid, liquid, gas d.Gas, liquid, ...
January 20, 2012 by erica

Physics
A 3.2 kg block with a speed of 11 m/s collides with a 11 kg block that has a speed of 3.3 m/s in the same direction. After the collision, the 3.2 kg block is observed to be traveling in the original direction with a speed of 6.4 m/s. (a) What is the velocity of the 11 kg block...
November 1, 2011 by Ashley

English
1. He bought him a cooking book. 2. He bought him a cookbook. (Which one is correct, 'cooking book' or 'cookbook'?) 3. Who wrote the song to her? 4. Who wrote the song for her? (Do we have to use 'to' or 'for'? Are both OK?)
April 5, 2012 by rfvv

Italian 2
i need help. well, not really. i just need someone to proofread this paragraph and make sure its good/ no spelling errors and etc. thanks a lot --------- Io vorrò essere una farmacista. Perché è una buona professione e affinché potrò aiutare la gente con la medicina. E anche, ...
January 14, 2009 by Aryan

Phi 200
well, first all, this is all subjective, there is no correct answer. In the end, we're all judging based on our "gut" feeling. My own personal opinion is: eating animal is ok, because that's what we've evolved to do. Just name me one Olympic champion who got gold medal and ...
June 13, 2012 by Tubby

Economics
Is the answer D on this question: 1. The basic principles of economics imply that policymakers should a. rely on markets to guide economic activity, except when markets produce inefficient or inequitable outcomes. b. enact policies that discourage people from specializing in ...
March 19, 2009 by Rod

English
I need to check my answers. The assignment was to write the appositives and appositive phrases in the following sentences, along with the words they rename or identify. Are these Correct? 3. A basketball star at age 13, she was known for her speed. *ANSWER* AP=A basketball ...
January 9, 2010 by Anne

Politcal Science
The principle of self-government emphasizes majority rule whereas the principle of liberty emphasizes individual rights. These principles a. are universal and are the foundation of all legitimate governments. b. have no real meaning in practice. c. have the same meaning for ...
October 5, 2010 by kenji

Stats Repost
Your mathematics instructor claims that, over the years, 88% of his students have said that math is their favorite subject. In this year's class, however, only 21 out of 32 students named math as their favorite class. The teacher decides to conduct a test of the hypothesis H0...
December 17, 2012 by Oops

quantitative chemistry
Consider a solution made by mixing 500.0 mL of 0.04182 M Na2HAsO4 with 500.0 mL of 0.03645 M NaOH. Complete the mass balance expressions below for Na and arsenate species in the final solution. There are 4 arsenate species, but I only got three of them. I am unsure of what the...
March 22, 2013 by Jackie

math 012 please help explain
can someone please help explain how to do this problem. i have a previous posting where i tried to work the problem out, and someone tried to explain where i was confused, but im still confused. 4(2n+1)=3(6n+3)+1
February 1, 2009 by amy

physics
Suppose a charge of -2.30 µC is at the origin and a charge of 2.90 µC is at the point (0, 3.00) m. (a) Find the electric potential at (4.00, 0) m, assuming the electric potential is zero at infinity. (b) Find the work necessary to bring a 4.40 µC charge from infinity to the ...
July 9, 2010 by alysse

Physics
The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises from 256 to 297 oC? (The factor is the ratio of the rates.) A catalyst decreases the activation energy of a ...
February 5, 2013 by Anonymous

English
I'm a little confused about making something possessive. For example, if I were to write America's history is fascinating. would that be correct, or would "Americas", or "Americas'" be right? Also, suppose you wanted to say that a dog belonged to Mrs. Ness (or anything ending ...
March 4, 2008 by Jenna

psychology
Sperm cells carrying the Y chromosome will A always result in the conception of a female baby B will result in the conception of twins more often than those carrying an X chromosome C typically result in children with brown eyes D usually carry less genetic material than those...
December 16, 2008 by ourania

statistics
If Z is a standard deviation, find the probability that Z lies between -1.10 and -0.36 You have not provided enough information to answer that question. Besides, a different symbol should be used for the standard deviation and the variable (Z) itself. Are you sure there isn't ...
August 4, 2007 by Artie

12 Chemistry
What is the molar enthalpy of combustion of magnesium? This was the lab question that I was asked to find after performing a lab based on Hess' law. I can't find anywhere in my notes how to calculate this, and the text book doesn't explain their steps properly, and I have ...
March 29, 2008 by Chase (sorry if this long)

biology
Which of the following statements is true? 1.Both unicellular and multicellular organisms are at risk of having too much water entering their cells if they are exposed to water containing no salts. 2.Only multicellular organisms have structures that enable them to regulate ...
October 10, 2013 by Cassie

english
Your project design has been approved by the management. The engineering team is about to start production of the new line. You want to make sure this process goes as smoothly as possible. You need to come up with a communication plan to address two of the following aspects of...
June 16, 2009 by laneice

MATH!!
In algebra right now, we're doing inverses and stuff. And I'm not sure if this problem can be solved with using an inverse formular, or just solved regularly.... Brian is rowing in a marathon. When rowing downstream, he is traveling at a rate of 10 miles per hour. While he ...
October 22, 2007 by Jen

Solvents
Question: When a TLC plate ws developed, the solvent front ran off the top of the plate. What should be done to correct the error. Me: The only reason I'm giving you this question to check is that it seems too simple. My answer would be to stop development before the solvent ...
October 15, 2006 by Sheryl

Noagist and non racist
She is a very capable black woman. If that is an effort to write a politically correct non-racist sentence, you have nearly succeeded. It would be better without the word "black". Otherwise, it might be thought of as having a condescending "attitude", as if it were unusual for...
January 27, 2007 by Lucy

Physics II
As a new electrical technician, you are designing a large solenoid to produce a uniform magnetic field with a magnitude of 0.170 T near the center of the solenoid. You have enough wire for 3300 circular turns. This solenoid must have a length of 1.70 m and a diameter of 23.0 ...
July 10, 2007 by Tifani

Alg2/trig
Hi, I hope you guys don't mind if I post a couple probability questions. A child returns a five-volume set of books to a bookshelf. The child is not able to read, and so cannot distinguish one volume from another. What is the probability that the books are shelved in the ...
March 24, 2009 by Chris

Physics
6)A 700kg car is travelling at a constant velocity of 35m/s when it slams on the brakes and comes to a stop. How far did the car travel during braking if the coefficient of kinetic friction is 0.62 ? (Hint: if the accelerator is no longer being pressed, is there an applied ...
October 31, 2009 by Anonymous

math
A 4-year magazine subscription costs $228 and may be canceled at any time, and a prorated refund will be made for the remaining weekly issues. If Siran cancels his subscription after receiving 32 issues in the 2nd year, what refund would he get? Assume there are exactly 52 ...
March 14, 2010 by jene

american government
All civil liberties are: a)so specific in nature that the courts have no difficulty determining how to interpret them b)conditional-no right is absolute in practice because a right can conflict with other rights and society's other legitimate interests c)contained in the First...
August 4, 2010 by vedrana

history
Which of the following statements about the Southern planter's world is most accurate? A. The stereotype of the "southern belle" is fairly accurate. B. Most great planters of the Old South were self-made men. C. The wives and daughter of plantation owners lived lives of ...
November 30, 2011 by jake

Health
A person’s daily sodium intake should be reduced to less than ________ milligrams and further reduced to ________ milligrams among persons who are 51 and older and those of any age who are African American or have hypertension, diabetes, or chronic kidney disease. A. 1,000; ...
July 28, 2012 by Aya Taraf

Physics
A worker pushes a 1500 N crate with a horizontal force of 345 N a distance of 24 m. Assume the coefficient of kinetic friction between the crate and the floor is .220. How much work is done by the floor on the crate? -M*g*(mu,k)*X Mg = 1500 N mu,k = 0.220 X = 24 m It is ...
February 27, 2007 by Mischa

Please Help
A bottle contains 0.5 quarts of grape juice. Keisha will use o.2 of the grape juice to make fruit punch. How much grape juice will keisha use for the fruit pumch? a. 0.3 b. 0.2, c 0.1 or d 0.01 I chose 0.3 but according to the teacher's edition it says the corrcect answer is ...
March 13, 2010 by MATH PLEASE HELP

statistics
The diameters of apples in a certain orchard are normally distributed with a mean of 4.77 inches and a standard deviation of 0.43 inches. Show all work. (A) What percentage of the apples in this orchard is larger than 4.71 inches? (B) A random sample of 100 apples is gathered ...
November 2, 2010 by Valerie

statistics
The diameters of apples in a certain orchard are normally distributed with a mean of 4.77 inches and a standard deviation of 0.43 inches. Show all work. (A) What percentage of the apples in this orchard is larger than 4.71 inches? (B) A random sample of 100 apples is gathered ...
September 2, 2011 by Laynette

Physics
A hydraulic lift is used to jack a 780 kg car 15 cm off the floor. The diameter of the output piston is 15 cm, and the input force is 160 N. a)What is the area of the input piston (in m^2)? b)What is the work done in lifting the car 15 cm? c)If the input piston moves 13 cm in ...
November 10, 2012 by Melissa

statistics
18 workers at a large assembly plant were asked the time it took to commute to work. The data was analyzed in Minitab and the Descriptive Statistics for the data appears below. Descriptive Statistics: Minutes Variable N Mean Median TrMean StDev SE Mean Minutes 18 30.06 29.50 ...
December 9, 2012 by Anonymous

fractions
fraction word problem. please advise on how to work the problem Phillip and Jane had a pie each. Phippip ate 1/4 of his and Jane ate more of the pie than Phillip. Which fraction of his pie could Jane have eaten. Possible answers: 2/5 1/6 2/8 or 1/8
June 9, 2011 by Suzanne

statistics
The diameters of grapefruits in a certain orchard are normally distributed with a mean of 6.45 inches and a standard deviation of 0.45 inches. Show all work. (A) What percentage of the grapefruits in this orchard have diameters less than 7.1 inches? (B) What percentage of the ...
August 28, 2011 by Laynette

Math
One shuttle service charges $10 for pickup and $0.10 per mile. The other shuttle service has no pickup fee but charges $0.35 per mile. Find the number of miles for which the cost of the shuttle service is the same. Please help me and show your work thanks.
February 21, 2012 by Cathy

Physics
(a) If the length of the Achilles tendon increases 0.55 cm when the force exerted on it by the muscle increases from 2200 N to 6000 N, what is the "spring constant" of the tendon? N/m (b) How much work is done by the muscle in stretching the tendon 0.55 cm as the force ...
June 8, 2012 by Adam

physics
A cylinder is fitted with a piston that is connected to the bottom by a spring. The spring has a spring constant of k = 3600 N/m. The cylinder is open to air at the top and is frictionless. The radius of the cylinder is 25 mm and the piston has negligible mass. The air beneath...
November 21, 2013 by jeremy

math
translate the following argument into symbolic form and determine whether it's logically correct by constructing a truth table. -ifthe team wins, then the team remains in the playoffs. If the team stays in the playoffs, then the championship is within reach. Therefore, if the ...
March 7, 2010 by jen

Science-Chemistry
when u use different materials, what are they most likely to be made from: elements, compunds, or mixtures? Which of the three is the most rare. I think that they are most likely to be made from compounds and mixtures. For ex. pops-drinks, juice, etc. Elements is the most rare...
March 29, 2010 by Sara

chemistry lab
Insert your values for x, y, z, & n into KxFey(C2O4)z·nH2O and provide the correct coefficients to balance the following equation: ___ Fe(NH4)2(SO4)2·6H2O + ___ H2C2O4 + ___ K2C2O4 + ___ H2O2 ___ KxFey(C2O4)z·nH2O + ___ (NH4)2SO4 + ___ H2SO4 + ___ H2O
April 30, 2010 by anonymous

Math
Verify if this is the correct form please. Given the parent function f(x)=log[10]x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis, a horizontal translation 2 units...
January 30, 2012 by Lea

chemistry
For the reaction: H2PO4- + HAsO42- ---> HPO42- + H2AsO4- Which pair exists as base in the equilibrium? H2PO4- & H2AsO4- are proton donors,therefore they are conjugate acids. HPO42- & HAsO42- are proton acceptors,therefore they are the base pairs asked in the question.Is it ...
March 27, 2012 by Swaastikaa

Chemistry(Please check)
1) Free energies of formation are a. always positive b. always negative c. never zero d. measured at 298K e. more than one response above is correct I think that free energies can be negative or postive so the answer cannot be e. I chose answer d, they are measured at 298K. ...
April 22, 2012 by Hannah

Government
Name 5 countries for each government system, Theocracy Oligarchy Aristocracy Autocracy Tyranny Despotism There might be more but I am not sure, please help me! http://en.wikipedia.org/wiki/Theocracy Search the rest of your terms at Wikipedia. You will see the search box on the...
October 20, 2006 by Lanna

Physics -- check answers please
Use g=10 N/kg in this assignment. 1. What is the gravitational energy (relative to the unstretched surface of the trampoline) of the 20 kg ball at its apex 2 m above the trampoline? I got 400 J 2. What is the kinetic energy of the ball just before impacting the trampoline? I ...
July 3, 2014 by Liz

english
My teacher told me that this sentence is ambigious. Can someone help me to fix this. "One of the main impacts is the transmission of many infectious diseases carried by insects, such as malaria and dengue which are sensitive to temperature, humidity, and changes in forest ...
October 25, 2007 by jason

CHEMISTRY HELLPPPPP
which would be the best anwser here? my guess was D but i wanna be sure Ammonium nitrate is sometimes used as a high explosive which reason best explains this? A)extremely water soluble B)contains ammonium ions C)excellent commerical fertlizer D)contains nitrogen in both its ...
April 22, 2007 by chem gurl

Pre-Calculus
Consider the chemical reaction aC2H6 + bCO2 + cH2O → dC2H5OH, where a, b, c, and d are unknown positive integers.? The reaction must be balanced; that is, the number of atoms of each element must be the same before and after the reaction. For example, because the number ...
December 4, 2013 by Ann

Calculus
The weekly demand for the Pulsar 25-in. color console television is given by the demand equation p = -0.03 x + 571\ \ \ \ \(0<=x<=12,000\) where p denotes the wholesale unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated ...
June 17, 2013 by Ant

Calculus
Astronomers have a mathematical model for the orbital speed of the stars as a function of their distance x from the center of the galaxy: V(x) = 350x/(1+(x^2))^(3/4) where x = 1 for 10,000 light years, x = 2 for 20,000 light years. At a distance of 10,000 light years, the ...
January 24, 2012 by Scooby10

Calculus
Find the intervals on which y=1/(x^2+1)^2 is increasing and decreasing. find the first derivative which is -4x/(x^2+1)^3 you should know that if the first derivative is positive, then the function is increasing and if it is negative, the function is decreasing. Now by ...
May 10, 2007 by Icy

economics
How do an economist as a scientist and an economist as a policy advisor help to create understanding of economics? As a scientists, we conduct experiments and do research following the scientific method. (e.g., we observe a phenomena, form a hypothesis, gather data, test ...
May 15, 2007 by tracey

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