Monday
September 22, 2014

Posts by Esther


Total # Posts: 234

a level chemistry
two most abundant atmospheric gases react to a small extent at 298K in the presence of a catalyst to achieve dynamic equilibrium: N2(g) + O2(g) ->/<- 2NO(g) Kp= 0.30 Partial pressure of N2 and O2 = 0.78atm 1dm3 flask and equilibrium established after 30min. temperature ...
September 7, 2014

chemistry
Determine the volume of 1.2 mol/L HCl that will be required to neutralize 150 mL of 0.080 mol/L Ba(OH)2
March 15, 2014

College Chemistry
If a 375 mL sample of water was cooled from 37.5°C to 0°C, how much heat was lost (in joules)
February 19, 2014

College Chemistry
A 150.0 mL sample of a 1.50 M solution of CuSO4 is mixed with a 150.0 mL sample of 3.00 M KOH in a coffee cup calorimeter. The temperature of both solutions and the calorimeter was 25.2°C before mixing and 31.3°C after mixing. The heat capacity of the calorimeter is ...
February 19, 2014

physical
a tortoise walks north at 0.4 mg for 14 meters, then north at 0.2mg for 30 meters ,then south at 0.3 m/s for 60 meters.what is his average speed?
September 8, 2013

math
a tortoise walks north at 0.4 mg for 14 meters, then north at 0.2mg for 30 meters ,then south at 0.3 m/s for 60 meters.what is his average speed?
August 23, 2013

physics
a box is sliding down a frictionless plane inclined at an angle of 30 degrees with the horizontal. what is the acceleration of the box?
August 12, 2013

physics
a 3200-lb elevator cab is supported by a cable in which the maximum safe tension is 4000 lb. (a)what is the greatest upward acceleration the elevator cab can have? (b) the greatest downward acceleration?
August 11, 2013

Physics
At sea level and 303 k, a rubber balloon is inflated with hydrogen gas to a diameter of 3.00 ft and an internal pressure of 16.7 lb/in scuared. Find the diameter of the balloon at an altitude of 30000 ft where the internal pressure is 6.4lb/in scuared and the temperature is 238k.
June 2, 2013

CHEMISTRY
No 4 ¶§ C
May 29, 2013

ECONOMICS
An amount of money that is paid by government to someone who is ill poor or has job consumption
May 19, 2013

literature
There are many similes and metaphors that allude to death and dying in the story (death in the shawl). Identify as many as you can and discuss their effect on the story.
April 7, 2013

Physics
6.9kg/m3
January 31, 2013

Physics
The density of a gas at s.t.p is 1.3kg/m3. Find the density of the gas at -15 degree celcius and at a pressure of 8cmHg.
January 30, 2013

math
Find the amount accumulated future value in the sinking fund if $1,200 is deposited quarterly for 10 years at 6% per year.
November 26, 2012

chemistry
chemistry 101
November 21, 2012

Help, Math 8th grade!!!!!
sorry lol, for the name ha ha
November 13, 2012

Help, Math 8th grade!!!!!
Dont know how the name jessica is in the name box lol!!
November 13, 2012

Help, Math 8th grade!!!!!
I dont get it ?? :/ Please explain
November 13, 2012

Help, Math 8th grade!!!!!
14. Triangle ABC has coordinates A(1, 4); B(3, –2); and C(4, 2). Find the coordinates of the image A'B'C' after a reflection over the x-axis. Please help!! I need answer now!! I have been working on this problme for over an hour cant get it, please help, ...
November 13, 2012

Please answer two math questions!!!
Thank you :)
October 23, 2012

Please answer two math questions!!!
10. From the 2010 census data, the population of Texas was about 2.5 x 107 people. Florida’s population was about 1.9 x 107. Idaho’s population was about 1.6 x 106. Which of the following statements is true? a)Idaho has a larger population than Florida. b)Florida has...
October 23, 2012

Please help with math!!
And thank you Reiny!!:)
October 23, 2012

Please help with math!!
Thank you steve!! Lol you made everything sound soo much easier :)
October 23, 2012

Please help with math!!
I dont know it doesnt say, sorry :/
October 23, 2012

Please help with math!!
Ted Andrews bought 15 shares of Clark Company stock at $14.875. He sold them a month later at $20.375. What was his profit? Please help!! :) Thanks to everyone who helps! a)$6.50 b)$49.50 c)$80.50 d)$82.50
October 23, 2012

Math!!
Thank you Reiny!! :)
October 23, 2012

Math!!
If there is 1/6 of a cake and Mitchell only wants 3/12 of it, how much of the cake does he want? Please help!! a)1/6 b)4/18 c)1/24 d)3/18
October 23, 2012

Math Please help!!
Lol, not sure ;)
October 23, 2012

Math Please help!!
Thank you sooo much steve!!! :)
October 23, 2012

Math Please help!!
2. Mrs. Whimsey’s class is having a pizza party. If there are 16 students and 4 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza each student receives? a) 1/3 b)1/16 c)1/4 d)1/8 Please help :)
October 23, 2012

English
Please I need an answer to this question: who is the antagonist in Groom Service short story. How does the author convey his/her character.
October 10, 2012

english
I am writing a dialogue between two characters in "Groom Service", I don't know if I am on the right track. I will appreciate it if you culd help me to read through this conversation nad make suggestions. I really appreciate our contributuion. After Martha and ...
October 10, 2012

math
arrays and expanded algorithm at Montclair School, Oakland, CA
October 3, 2012

calculus
How do I solve this using the TERM BY TERM method? If f(x)= (2x^2 - 5x - 3) / (3-x) find f'(-8).
October 2, 2012

science
Think about the impact that two (2) of your meals have on our world from an ecological and economic perspective. You can pick breakfast, lunch or dinner, and then answer the following questions
August 12, 2012

Health Policy and Economic Analysis Care
Argue the following statement: Despite our relatively high level of healthcare expenditure, we may still be getting enough for our money.
May 30, 2012

health
Argue the following statement: Despite our relatively high level of healthcare expenditure, we may still be getting enough for our money.
May 21, 2012

physics
Describe the operation of electrons in a conductor
April 29, 2012

L.o
Global warming.name two institutions/community organizations that are involved in supporting or giviing redresss to these disaster.Explain how these organizations are involved in providing a safe and healthy environment.(suggestion:Find out about NGO's or other ...
April 22, 2012

Grade 12 life orientation
i need answers
April 19, 2012

Statistics - Probability
A mutual fund company has six funds that invest in the U.S. market and four funds that invest in foreign markets. An investor wishes to create a mutual fund portfolio composed of two U.S. funds and two foreign funds. Unknown to this investor, one of the U.S. funds and one of ...
April 8, 2012

Statistics
You are responsible for quickly fixing your company¡¯s computer system when it crashes. You know that there are three possible sources of errors in the system: the disk drive, the memory and the operating system. From an analysis of historical data, you find that 50...
April 8, 2012

Statistics - Math (Please Please help!!)
You are an owner of a firm that manages other small manufacturing companies, which pay you to employ temporary salespersons to sell their products. The owner of one of these firms wants to increase their sales and promised to give you a bonus of $12,000 if your temp ...
April 8, 2012

math
explain how you can find the numbe of feet in 40 yds
February 2, 2012

Literacy
In a (----), consumers ultimately decide what should be produced.
January 17, 2012

Biomechanics
XY coordinates of the right toe of a soccer kick performer are Frame 20: (2.62, 0.99) Frame 14: (2,34, 0.16). How far did the toe travel in the upward direction between frames 14 and 20? How fast did the toe travel in upward direction between frames 14 and 20? How fast did the...
October 8, 2011

Life orientation
1. Identify environmental or human factor that causes ill health,accidents,crises,& disasters within communities. 2. Discuss ways in which the human or environmental problem impacts on the community
June 11, 2011

parachute
What is air resistance ?? how is it caused ?? how is it increased??
May 9, 2011

math
What is the intersection of A and B? a (4,8,12,16) b (8,16,24)
May 4, 2011

english
count the letters in each word. write them in the right box .2, 3, 4, 5
April 13, 2011

Algebra 2
During the first part of a trip a canoeist travels 93 miles at a certain speed. The conoiest travels 5 miles on the second trip at 5mph slower. The total time for the trip is 2 hrs. What was the speed on each part of the trip? I entered 1.999 as answer given, but it was wrong...
April 1, 2011

Algebra 2
Aki's Bicycle Designs has determined that when x hundred bicycles are built, the average cost per bicycle is given by c(x) =0.1x^2 -0.5x+ 9.295. Where C(x) is in hundreds of dollars, how many bicycles should the shop build to minimize the average cost per bicycle? Thank ...
April 1, 2011

algebra 2
This answer is wrong, If I can just get the time of the first trip, I can take it from there. I don't need to know the second trip, just the first trip. I appreciate your help. Thank you
March 31, 2011

algebra 2
During the first part of a trip a canoeist travels 93 miles at a certain speed. The conoiest travels 5 miles on the second trip at 5mph slower. The total time for the trip is 2 hrs. What was the speed on each part of the trip? Thank you for all your help.
March 31, 2011

Algebra 2
During the first part of a trip a canoeist travels 93 miles at a certain speed. The conoiest travels 5 miles on the second trip at 5mph slower. The total time for the trip is 2 hrs. What was the speed on each part of the trip? Thank you for all your help.
March 31, 2011

Algebra 2
I apologize for that. I didn't realize I didn't write the whole problem. Thank you for pointing that out to me. Aki's Bicycle Designs has determined that when x hundred bicycles are built, the average cost per bicycle is given by c(x) =0.1x^2 -0.5x+ 9.295. Where C(...
March 31, 2011

algebra 2
Aki's Bicycle Designs has determined that when x hundred bicycles are built, the average cost per bicycle is given by c(x) =0.1x^2 -0.5x+ 9.295 Thank you for your help
March 31, 2011

algebra 2
You want to use Pythagorean theory here. So a^2 + b^2 = c^2. a and b would be the 2 side length and then solve for c. Do you think you can take it from here? If you tell me what you got as a answer I can figure it out and let you know what I got. To be honest with you, I don&#...
March 29, 2011

algebra 2
Darla is building a new desk. To make sure she had made a square corner, she measures 10ft from the corner along one edge and 7ft from the corner along the other edge. How long should the diagonal be betwee those two points if the corner is a right angle? Thank you
March 29, 2011

algebra 2
Darla is building a new desk. To make sure she had made a square corner, she measures 4ft. from the corner along one edge and 6ft. from the corner along the other edge. How long (in feet) should the diagonal be between those two points if the corner is a right angle? Thank you
March 28, 2011

algebra 2
Guy wire. How long is a guy wire reaching from the top of a 21ft pole to a point on the ground 14 ft from the pole? Thank you.
March 28, 2011

algebra 2
Guy wire. How long is a guy wire reaching from the top of a 24ft pole to a point on the ground 16 ft from the pole? Thank you.
March 28, 2011

algebra 2
Guy wire. How long is a guy wire reaching from the top of a 24ft pole to a point on the ground 16 ft from the pole? Thank you.
March 28, 2011

math buisness 141
what does equivalent rate in decimals mean?
March 25, 2011

algebra 2
The stopping distance d of a car after the brakes are applied varies directly as the square of hte speed r. If a car travelling 70mph can stop in 270ft, how many feet will it take the same car to stop when it is travelling 60mph? Thank you.
March 17, 2011

algebra 2
Solve the following for the variable x. (7/x-2)+(1/x+2)=(3x/x^2-4) Thank you.
March 17, 2011

Algebra 2
Solve the following for the variable x. (7/x-2)+(1/x+2)=(3x/x^2-4) Thank you.
March 16, 2011

algebra 2
Solve the following equation for the variable x. (4/x-2)+(3/x+2)=(-3x/x^2-4) Thank you very much for your help.
March 16, 2011

Algebra 2
The stopping distance d of a car after the brakes are applied varies directly as the square of hte speed r. If a car travelling 70mph can stop in 270ft, how many feet will it take the same car to stop when it is travelling 60mph? Thank you.
March 16, 2011

Algebra 2
Solve the following equation for the variable x. (4/x-2)+(3/x+2)=(-3x/x^2-4) Thank you very much for your help.
March 16, 2011

Algebra II
Hooker's law. The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 39cm when the weight is 3kg, what is the distance when the weight is 9kg? Thank you, before hand.
March 16, 2011

algebra 2
It takes 2 hr for 8 cooks to prepare the food for a wedding rehearsonal. How long would it take 5 cooks? Thank you
March 15, 2011

algebra 2
Hat sizes are determined by measuring the circumference of one's head in either inches or centimeters. Use ratio and Proportion to complete the following table. Hat Size: Hat size: 7 1/4, 7 1/8 Head circum to nearest 1/5 22/45. Head circum to the nearest 56cm 58. I hope I ...
March 15, 2011

algebra 2
10 cm^3 of normal specimen of human blood contain 1.2g of hemoglobin. How many grams does 40cm^3 of same blood contain? Thank you.
March 15, 2011

Algebra 2
Subtract. Simplify by removing a factor of 1 when possible. (10bf)/(b^2-f^2)-(b-f)/b+f) Thank you for your help
March 11, 2011

Algebra 2
So, is the answer (b-f)(b+f)? which I think goes at the bottom as a fraction, and if it does, what is the number that goes on top? However, I could be wrong, can you please help me understand? Thank you.
March 11, 2011

Algebra 2
Subtract. Simplify by removing a factor of 1 when possible. (10bf)/(b^2-f^2)-(b-f)/b+f) Thank you for your help
March 11, 2011

Algebra 2
Subtract. Simplify by removing a factor of 1 when possible. (9p^b)/p^2-b^2 - p-b/p+b. Thank you. These problems, I don't understand at all. I'm sorry.
March 10, 2011

Algebra 2
Subtract. Simplify if possible. (2-v)/v-5-(3v-5)/5-v Thank you all for all your help. It is gratefully appreciated.
March 10, 2011

Algebra 11
I'm sorry, I forgot the 5, it was 5v. It didnt have brackets, that's why I didn't put any, but it goes like this: Subtract. Simplify if possible. v-7/v -2v-9/5v. Note: the slashes mean fraction form, in other words, it's v-7 on the top and v, alone in the ...
March 10, 2011

Algebra 11
Subtract. Simplify if possible. v-7/v-2v-9/5v. Thank you for your help.
March 10, 2011

Algebra 2
Find all number for which the rational expression is undefined. q^3-59/9^2-64. Thank you
March 2, 2011

Algebra 2
Find all numbers for which the rational expression is undefined. p^3-3p/p2-49. Thank you.
March 2, 2011

math
Harry spent one third of his money on a hat, 1/6 on socks, and $12.00 on a tie. How much money did Harry spend?
February 28, 2011

math
Harry spent one third of his money on a hat, 1/6 on socks, and $12.00 on a tie. How much money did Harry spend?
February 28, 2011

algebra 2
Factor completely 6r^2+13rd+6d^2. I'm sorry, you are absolutely correct, there was a typo it was>>> (6b), the correct is 6d. thank you for spotting that mistake.
February 27, 2011

algebra 2
Factor completely 6r^2+13rd+6d^2. I'm sorry, you are absolutely correct, there was a typo it was>>> (6b), the correct is 6d. thank you for spotting that mistake.
February 27, 2011

algebra 2
Factor completely 6r^2+13rd+6b^2. Thank you.
February 27, 2011

algebra 2
Hi there, I feel so embarrassed that even after you give me the answer, i dont even know how to format it. I most definately need to learn this and quickly! if I expect to make my grade. I really apologize for my shortcomings. But, how is it that you write out the problem, is ...
February 26, 2011

algebra II
Thank you for your prompt response. I have my homework I have to turn in in about 2 hours, but i am struggling to solve this question. Is there any way you can just give me the answer while I find a website that can show me step by step how to solve these kind of problems? I ...
February 26, 2011

algebra II
Thank you for your prompt response. I have my homework I have to turn in in about 2 hours, but i am struggling to solve this question. Is there any way you can just give me the answer while I find a website that can show me step by step how to solve these kind of problems? I ...
February 26, 2011

algebra II
please, somebody help me Divide. x^2+7x-37/x+9. Please help me. I need all the help I can get. Thank you so much.
February 26, 2011

algebra II
I would appreciate anyone's help in solving this problem.(1/4x^4+6/7x^3+1/8x^2+7) + (-3/4x^4+7/8x^2-7). Thank you kindly.
February 26, 2011

Algebra 2
Divide. x^2+7x-37/x+9. Please help me.
February 25, 2011

Algebra 2
Please help! (1/4x^4+6/7x^3+1/8x^2+7) + (-3/4x^4+7/8x^2-7).Thank you
February 25, 2011

Algebra 2
1/16x^4 +3/8x^3 +1/8x^2+1)+ (-9/16x^4 +7/8x^2 -1) I had previously made a mistake in the first set of problems in the last numbers. instead of +1, I had -1. I apologize for the confusion. Thank you.
February 24, 2011

algebra 2
Divide and check. Write your answer using none negative exponents. 40x^2y^2/5x^4y^2. Thank you.
February 24, 2011

Algebra 2
Add(1/12X^4+6/7X^3+3/8X^2+5)+ (-7/12X^4+5/8X^2-5). "Please help me solve this"
February 24, 2011

algebra 2
Add(1/12X^4+6/7X^3+3/8X^2+5)+ (-7/12X^4+5/8X^2-5). "Please help me solve this"
February 24, 2011

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