Tuesday

July 7, 2015

July 7, 2015

Total # Posts: 1,674

**Chemistry**

Concentration 15.8 mg/L Final Volume 100.0 mL What is the concentration of phosphate in the original lake water sample if the unknown lake water sample in the option has been diluted by taking 25.0 mL of lake water and diluting it to the indicated final volume?
*December 5, 2012*

**Chemistry**

The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq). The Sb3 (aq) is completely ...
*December 3, 2012*

**Art Please check answers**

^^ Your welcome's answers are 100% right, for anybody who is reading this.
*December 3, 2012*

**Math**

The grade of a highway up a hill is 50%. How much change in horizontal distance is there if the vertical height of the hill is 175 feet?
*December 3, 2012*

**Calculus**

Evaluate Integral of (lnx)^4/x dx when b is E and a is 1
*December 3, 2012*

**Math**

OMG, thank you!
*December 3, 2012*

**Calculus**

Evaluate integral of x times square root of (2x-1)dx
*December 3, 2012*

**Calculus**

Evaluate integral of x times the square root of (x-4) dx I got u-(8u^(3/2) over 3) Can anyone check this for me?
*December 3, 2012*

**Chemistry**

Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. Mo^3+ -> MoO2^2+
*December 2, 2012*

**Chemistry**

The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq). The Sb3 (aq) is completely ...
*December 2, 2012*

**Chemistry**

Classify each of the following as a redox reaction or a non-redox reaction. Zn+CuCl2 -> ZnCl2+Cu HCl+NaOH -> H2O+NaCl 2CO+O2 -> 2CO2 SO3+H2O -> H2SO4
*December 2, 2012*

**Chemistry**

Can someone check my answers? What is the oxidation state of each element in K2Cr2O7? K +1 Cr +6 O -2 What is the oxidation state of each element in SO32–? S +4 O -6
*December 2, 2012*

**sat essay**

Assignment: Should heroes be defined as people who say what they think when we ourselves lack the courage to say it? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, ...
*November 30, 2012*

**SAT Essay **

Assignment: Should heroes be defined as people who say what they think when we ourselves lack the courage to say it? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, ...
*November 30, 2012*

**Lang Arts**

4 is c. You made me get it wrong... -_-
*November 28, 2012*

**Physics**

Which requires more energy: to raise 1 kg of liquid water from 0 to 100 degrees (Celsius) or to turn that water to steam after it hits 100 degrees? Assume the specific heat capacity of water is approximately independent of temperature.
*November 28, 2012*

**math**

44% of adults say cashews are their favorite kind of nut. You randomly select 12 people and ask each to name their favorite nut. Find the probability that the number who say cashews are their favorite nut (a) exactly three, (b) at least four, and (c) at most two.
*November 25, 2012*

**Chemistry**

How do you prepare 600.0mL of 0.48M Al(NO3)3*9H2O? Is this correct? 1. Measure out 71g of solution 2. Put approx. 300.0mL of water into container 3. Add the 71g of solution to the water and mix 4. Add more water until 600.0mL of solution is obtained 5. Mix •Chemistry - ...
*November 25, 2012*

**Chemistry HELP**

Isn't the total mass of the Al(NO3)3*9H2O around 247.18 g/mol?
*November 24, 2012*

**Chemistry**

How do you prepare 600.0mL of 0.48M Al(NO3)3*9H2O? Is this correct? 1. Measure out 71g of solution 2. Put approx. 300.0mL of water into container 3. Add the 71g of solution to the water and mix 4. Add more water until 600.0mL of solution is obtained 5. Mix
*November 24, 2012*

**Chemistry**

The moles of C is 3.227. The moles of F is 3.224. Therefore the empirical formula is CF. How would I find the empirical mass? Your explanation is confusing.
*November 23, 2012*

**Chemistry**

For n I got 26.18 mols. For the mass I got 31 because it was CF.
*November 23, 2012*

**Chemistry**

A 0.02882 g sample of gas occupies 10.0-mL at 288.5 K and 1.10 atm. Upon further analysis, the compound is found to be 38.734% C and 61.266% F. What is the molecular formula of the compound? What is the geometry shape around each carbon atom? Polar or Nonpolar?
*November 23, 2012*

**English-Grammar **

The underlined words (I put them in parantheses) are an example of a(n) ___________. (When the earth, moon, and sun are in line), an eclipse occurs. A. adverbial clause B. adjectival clause C. noun clause My answer is C.
*November 19, 2012*

**Grammar**

Thanks :)
*November 16, 2012*

**Grammar**

Which of the sentences below displays the correct punctuation? A.The patient looked at the doctor as though he had never seen her before. B.Even though Laura is very young she is already a skilled chess player. C.Carlos asked me to buy the gift, since I am more aware of our ...
*November 16, 2012*

**physics HELPP!!!!!!!**

Two astronaut, as shown in the figure, each having a mass of 88.0 kg, are connected by a 10.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 6.00 m/s. By pulling on the rope, the astronauts shorten...
*November 14, 2012*

**Grammar**

Thanks :)
*November 14, 2012*

**Grammar**

"that"?
*November 14, 2012*

**Grammar**

Which of the following is a complex sentence? A.After the class, we all went to Alec's house. B.Alec's brother John was home, but his sister Cynthia wasn't. C. Alec suggested we all go to the neighborhood pool. I'm thinking the answer is A, but I'm not too ...
*November 14, 2012*

**physics HELPP!!!!!!!**

A beam resting on two pivots has a length of L = 9.00 m and mass M =89.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot placed a distance 4.00 m from the left end exerts a normal force n2. A woman of mass m= 48.0 kg steps onto the ...
*November 14, 2012*

**physics HELPP!!!!!!!**

A 6.00 kg mass is connected by a light cord to a 1.00 kg mass on a smooth surface as shown in the figure. The pulley rotates about a frictionless axle and has a moment of inertia of 0.400 k∙m2 and a radius of 0.700 m. Assuming that the cord does not slip on the pulley, ...
*November 14, 2012*

**Math**

Please help! Economy drapes for a certain size window cost $90. They have shallow pleats, and the width of the fabric is 2 times the window width. Luxury drapes of the same fabric for the same size window have deeper pleats. The width of the fabric is 3 times the window width...
*November 13, 2012*

**Math**

Letter 'C' on this question confuses me, please help! Holly has joined a video rental club. After paying $6 a year to join, she then has to pay only $1.25 for each new release she rents. a. Write an equation in intercept form to represent Holly’s cost for movie ...
*November 13, 2012*

**Math**

Freshman math question, super confused! Today while Don was swimming, he started wondering how many lengths he would have to swim in order to swim different distances. At one end of the pool, he stopped, gasping for breath, and asked the lifeguard. She told him that 1 length ...
*November 9, 2012*

**math**

Yes it is 88.9%!
*November 8, 2012*

**Math for Steve or someone good at math**

The answers in order are: B D A D D
*November 8, 2012*

**physics**

A 1,660 kg car is parked on a hill with a slope of 8.0°. Its brakes and transmission are locked in position to keep the car from rolling. The coefficient of static friction of the rubber tires on the asphalt road is 0.14. What is the force of static friction between the ...
*November 6, 2012*

**physics**

A sled whose total mass with cargo is 30.0 kg rests on ice. The coefficient of static friction is 0.20, and the coefficient of kinetic friction is 0.15. The sled is attached to a rope, horizontally, in which the tension force is slowly increased. How much tension force applied...
*November 6, 2012*

**calculus**

Just take tbe derivative of the functions, set that to zero and solve for x. Take those values you got and the interval values and test them in the ORIGINAL function ( f(x) not the derivative! )and see which is the biggest value (absolute max) and the smallest value (absolute ...
*November 4, 2012*

**Physics**

she could have meant 14.1... just saying
*November 4, 2012*

**Math**

Thanks alot to "Miss Sue". I like how you show us how to do it, not just give the answers. Very helpful.
*November 2, 2012*

**elementary**

Why would you ask me this simple question?
*October 30, 2012*

**Physics**

the last one
*October 26, 2012*

**physics **

If you walk 3.0 km on a straight road and then find that you are 1.5 km east of your starting point and some unknown distance north of your starting point, in which of these directions did you walk?
*October 25, 2012*

**physics**

A balloonist drops an apple weighing 1.5 N over the side of the balloon's gondola. As it falls and increases speed, the drag force from the air upward on it increases. When the upward force is 0.7 N, what is the direction and magnitude of the net force on the apple?
*October 25, 2012*

**math**

answers were: 0,1 10,11 2,3
*October 25, 2012*

**math**

determine between which consecutive integers the real zeros of each function are located. f(x)=3x^3 – 10x^2 + 22x – 4 (I got 0,1) f(x) = x^3 – 12x^2 + 17x – 9 (NO idea) f(x) = x^3 – 9 (I got 8,9) Thanks for the help, I really appreciate it. I need the ...
*October 25, 2012*

**English**

Ooops, it actually was c. I thought that A and B were too direct, but I also didn't think that C really characterized the person, maybe that's why it was the right answer. I should just stick to my original answers, hehe :) Thanks for the help.
*October 25, 2012*

**English**

B may be someone refering to another person, but I find it hard to tell. I know it isn't A because it is saying directly that Macbeth is brave, I'm not sure about b because it is kinda like sentence a, and c doesn't refer to much of anything so i'm confused. So...
*October 25, 2012*

**English**

Which of the following is an example of indirect characterization? A.“brave Macbeth” B.“worthy gentleman” C.“Bellona’s bridegroom” I'm guessing C, but i'm really not sure. The help is so appreciated.
*October 25, 2012*

**maths**

You have to distribute the "x" on the outside to (x-5) to get (x^2-5x) then FOIL. FOIL stands for first, outside, inside, last. This is the pattern of multiplication you have to use to solve this type of problem. It hard to show how to foil online, just look it up, ...
*October 25, 2012*

**7th grade math Ms. Sue please**

It's not cheating if she already has the answers she's asking for help. If she asked what the answers where without trying it would be cheating
*October 24, 2012*

**English**

from Sir Gawain and the Green Knight Why didn’t the Green Knight want to duel? A.He was a peaceful knight. B.He would easily win. C.He did not bring a weapon. D.He never fought at Christmas. I think the answer is either A or B. Thanks for the help.
*October 23, 2012*

**Physics**

A car with its brakes locked will remain stationary on an inclined plane of dry concrete when the plane is at an angle of less than 45 degrees with the horizontal. What is the coefficients of static friction of rubber tires on dry concrete
*October 23, 2012*

**English**

Oh, I meant C for ambitious. Thanks!
*October 23, 2012*

**English**

So which answer should I chose? I think I might go with B because she is a nun trying act as refined as those of the Court, I guess that makes her ambitious
*October 23, 2012*

**English**

Based on the following description of the Nun, which word BEST describes her? At meat her manners were well taught withal; / No morsel from her lips did she let fall, / Nor dipped her fingers in the sauce too deep; / But she could carry a morsel up and keep / The smallest drop...
*October 23, 2012*

**physical science**

how much heat is absorbed by contacting 10 grams of 100 degree C steam by a students hand.
*October 22, 2012*

**physical science**

how much heat is absorbed by pouring 10 grams of 100 degree C liquid water on a students hand. The water is cooled to body temperature 37 degree C
*October 22, 2012*

**Physics**

How much heat must be removed from 500 grams of water at 0 degrees C to form ice at 0 degrees c?
*October 22, 2012*

**math/calc**

gotta find the first and second derivative of f(x)=x^2/(x-1) thanks for help!
*October 18, 2012*

**Grammar**

Thank you so much
*October 18, 2012*

**Grammar**

Which of the following combines the sentences below by coordinating? Senate pages may be between fourteen and seventeen years old. Pages in the House must be high school juniors or seniors. A.Senate pages may be between fourteen and seventeen years old, while pages in the ...
*October 18, 2012*

**English-Grammar**

Thanks :)
*October 18, 2012*

**English-Grammar**

That makes the answer B, then?
*October 18, 2012*

**English-Grammar**

Identify the word or words the best describes the underlined(in parentheses) word for the question (Comparing the two essays), it is obvious that one relied on more thorough research. A.prepositional phrase B.participial phrase C.gerund phrase D.infinitive phrase I think the ...
*October 18, 2012*

**Math**

A town has population 225 people at year t=0. Write a formula for the population, P, in year t. a) grows by 10% per year I don't understand how to do this, and keep getting the wrong answer. Also, Find a formula for the linear function q(x) whose graph intersects the graph...
*October 17, 2012*

**CIS 210**

AAAAhhhh...this is due today!!!
*October 17, 2012*

**Psychology**

The answer was A, oh, well....
*October 16, 2012*

**Psychology **

The impact of drug x on fertility rates in young women A.Potentially rendering young women unable to have children B.Potential birth defects if the women should become pregnant during the study C.Exposing young women to an untested drug D.There is no ethical dilemma I'm ...
*October 16, 2012*

**English-Grammar**

Thanks :)
*October 16, 2012*

**English-Grammar**

Yeah, it doesn't make sense for people to be imported. So the answer is C, then?
*October 16, 2012*

**English-Grammar**

please help. I think the answer is either B or C
*October 16, 2012*

**English-Grammar **

Which of the following sentences does NOT contain a dangling modifier? A.Torn from its moorings, the high wind drove the boat onto the rocks. B.Imported in the last century, the people on Easter Island outnumber the horses. C.The Stanleys moved into the house, although it was...
*October 16, 2012*

**Chemistry**

3.68kj of energy are released per ml so it is actually 3.68kj/ml you need to cancel out the ml by multiplying to get the heat lost by ice water for this specific amount of ice water
*October 15, 2012*

**English Literature**

What is ironic about the rioters' wish to kill Death? A.Death is the one who seeks people to kill. B.The rioters should be concerned about each other's greed. C.The rioters believe they can be successful. D. Death and the rioters are thieves. I think the answer is ...
*October 11, 2012*

**7th grade social studies help quick please**

you will get banned from your school if they know this is you but thanks for the answersssssss
*October 10, 2012*

**Math (kindergarten)**

start on the right. 8+1=9 move to the left side. 1+2= 3. the solution to this problem is 39
*October 10, 2012*

**Physics**

K = 1/2 * m * v^2 Convert km/h to m/s, and solve for K
*October 9, 2012*

**precalc **

I am stuck on this one problem and think it might be the teachers typo but don't want to point it out without being sure. You have to find the zeros (we use long division) of x^5+8x^3+16x but because these are all raised to odd powers they either give me negative or ...
*October 3, 2012*

**Physics**

where did you get the numbers .23 and -1.167 from?
*October 3, 2012*

**precalc**

f(x)=2+4x-x^2 when x is less than 2 thus f-1(x)=2-sqrt(-x+6) i need to show that f(f-1(x))=x, but i keep getting negative x...any help
*September 30, 2012*

**anatomy**

do you think there is a difference in the absolute force generated by males and females? I think the answer is yes just by the common knowledge that males are typically stronger than women. But, I'm not sure how to scientifically explain why a man's muscles are able to...
*September 27, 2012*

**physics**

t = 1.8 x = 36 meters y = -3.75 meters Vox = x/t = 36/1.8 Vox = 20 m/s Vox = VocosƟ 20 = VocosƟ Vo = 20/cosƟ Voy = Vo + at y = Voyt + 0.5at2 = -VosinƟ -4.9t2 -3.75 = (20/cosƟ)sinƟt -4.9t2 <----plug in t = 1.8 -3.75 = (20)(2)tanƟ - (4.9)(3....
*September 25, 2012*

**social study**

It should be : warmer than at either Z or U (if X is located on the center of the globe {equator} then it should be warmer than Z and U)
*September 24, 2012*

**chem**

have 0.0114 mole of Cu(OH)2 (s) a gelatinous precipitate. After heating, and converting all of it to CuO(s) wash the solid as a means of purifying it. How much (in g) should you have of CuO at this point? do you just convert 0.0114 moles cu(OH)2 to grams and then thats the ...
*September 24, 2012*

**math**

The combined capacity of a bottle and a glass is equal to the capacity of a pitcher. The capacity of a bottle is equal to the combined capacity of a glass and a mug. The combined capacity of three mugs is equal to the combined capacity of two pitchers. How many glasses ...
*September 23, 2012*

**math**

An empty truck weighs 2000 kg. After the truck was loaded, freight made up 80% of the weight of the loaded truck. At the first stop one fourth of the freight was unloaded. What percent of the loaded truck's weight did the load make up after that? (Hint: freight = load.) A...
*September 23, 2012*

**math**

In how many ways can you express the number 2003 as a sum of two prime numbers? A) 1 B) 2 C) 3 D) 4
*September 23, 2012*

**Physics**

3. s=m and m^3/m is m^2. the square root will be m.
*September 21, 2012*

**Physics**

The leg and cast in Figure P4.18 weigh 290 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w2 weighs 125 N. Determine the weight w1 and the angle α needed in order that there be no force exerted on the hip joint by the leg plus...
*September 16, 2012*

**world history **

The popularity of an individual Hindu deity was largely a reflection of a) its ranking by the Hundred Schools of Thought. b) the approval it received from Siddhartha Gautama. c) its pre-Aryan origin. d) the size of its pyramids. I think it's A but I'm not positive.
*September 14, 2012*

**AP world history**

bro, i know what you're going through keep strong and CTRL+F
*September 11, 2012*

**math**

sovle the following equation 8/x-1=9/(x)(x+2) i know the answer is -1,7 but how?
*September 10, 2012*

**Math**

I solved the equation below and got an answer of 9+-sqrt(57) but i don;t belive this is correct. help please. 5-sqrt(8x+1)=x 8x+1=x^2-10x+25 0=x^2-10x+25-8x-1 0=x^2-18x+24 then i completed the sqare got 9+-sqrt(57) THANKS SO MUCH
*September 10, 2012*

**geology**

2150
*September 4, 2012*

**Math**

A baseball is thrown upward from ground level with an initial velocity of 48 feet per second, and its height h in feet is given by , where t is the time in seconds. At what time does the ball reach 10 feet? Round to the nearest tenth. Step by step please
*September 4, 2012*

**Calculus**

1. Find an ordered pair that represents 6 vector v - 5 vector w if vector v =(9,5) and vector w = (6,9). 2. Find an ordered triple that represents 6 vector y + 4 vector z if vector y = (2,6,8) and vector z = (7,-2,6) 3. Find the magnitude of vector WX for W(3, –3, 1) and ...
*August 30, 2012*

**English Poetry Check**

I expect you to help? this is a homework help site is it not? excuse me for not getting them right? Itd be nice to get help and to be told as to why the answers are wrong.
*August 29, 2012*