Thursday
October 23, 2014

Posts by christine


Total # Posts: 436

Math
What equation do I use to find out what I need to get on my exam to pass my class. I have a 65.9% and the exam is 20% of my grade....if you need any additional information let me know..... also a passing grade is 59.5
January 17, 2012

chemistry
At a pressure of 1.7 atm a balloon has a volume of 4.98 L . If the pressure is decreased to 1.0 atm (at constant temperature) what is the new volume of the balloon?
December 14, 2011

Chemistry
Do I need to first figure out the PH? I believe that a= 3 and b=2.87 therefore it will require more naoh to titrate the acetic acid. I am not sure i figured the ph of acetic acid correctly, or if i am on the correct path here...
December 9, 2011

Chemistry
Suppose you have two solutions to titrate with NaOH: (a) 10 ml of.1M HCL (b) 10 ml of .1M CH3COOH would you expect either of the solutions to require different volumes of NaOH in order to reach an end point? Explain
December 9, 2011

MEANING
What is the meaning for vagaries.also give me a sentence for it.
December 6, 2011

meaning
what does the word vagaries mean.Also put a sentence for it
December 6, 2011

calculus
An annuity has a differential equation of y'=4500+.035y, and an initial condition of y(0)=1000. Describe what is going on.
December 1, 2011

chemistry
6.022 x 1023 atoms. Thank you Dr Bob222
November 30, 2011

chemistry
How many atoms are in 95.96 g of molybdenum (Mo)
November 30, 2011

Physics!
The following four forces act on 4.00 kg object: F1 = 300 N east F2 = 700 N north F3 = 500 N west F4 = 600 N south What is the acceleration of the object?
November 1, 2011

Physics
A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest in a distance of 140 m. What is the constant force applied to the car to bring it to rest?
November 1, 2011

math
What Is the ture math relationship using the numbers 1,1,1,10,7,8 ,5 to make it 1 or equal to one in fractions?
October 27, 2011

Pre-Algebra
suppose the projector is moved to a point 9 ft from the screen. what size will the picture be (width, height, and area) please help
October 26, 2011

Home Insurance
its D
October 23, 2011

Math/Calculus
After 5 days, a particular radioactive substance decays to 37% of its original amount. Find the half life of this substance. Is this right? Th= ln 2/ln(1/.37) x 5 days
October 17, 2011

Accounting
I have added Below my balance sheet and income statement now the statement of owners equity is the beginning capital 28,2800 plus the net income 21,550 which is 49,750 less withdrawals 5,000 equals 44,750 which does not equal my assets. I cannot figure out what I am doing ...
October 8, 2011

Accounting
Sorry about that I have added Below are my balance sheet and income statement now the statment of owners equity is the beginig capital 28,2800 plus the net income 21,550 which is 49,750 less withdrawls 5,000 equals 44,750 which does not equal my assets. I cannot figure out ...
October 8, 2011

Accounting
Statement of Owner's Equity I've tried to get it to balnce with the amount of on my balance sheet of $54,500.00 but can not can you help Cash… …… ……… … … … ………$21,500 Accounts Receivable………17,...
October 8, 2011

help please :-)
Could be both a and B
September 28, 2011

help please :-)
its the supporting details
September 28, 2011

math
solve. (3k+4.2)+8.6 and (3s)x8
September 19, 2011

Science economic
Cesium 138 has a half life equal to 32.2 minutes. how long will it take for 2/4 of this sample to decay
September 5, 2011

vocab
i need hel because i dont know how to use indignation in a sentence and it make sense!
August 21, 2011

math
2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3. Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c) 4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work 5. Solve the following equation for z. Please show all of your work. x...
August 15, 2011

math
Solve. Please show all of your work. Find the length and width of a rectangular lot with a perimeter of 108 meters if the length is 8 meters more than the width.
August 15, 2011

math
Solve 4x- 3(5x-8)=23-9(x+2) . Please show all of your work
August 15, 2011

math
Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c)
August 15, 2011

math
Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3|
August 15, 2011

math
Simplify. Please show all of your work. 12* 1/4 +2/-2^3
August 15, 2011

math
Write the slope-intercept equation for the line with the given slope that contains the given point m = 3/4 ; (0, 5)
August 15, 2011

math
Write a slope-intercept equation of the line whose graph is described Parallel to the graph of 3x + 2y = 5; y-intercept (0, −1)
August 15, 2011

math
Four-year -college tuition. The average tuition at a public four-year college was $3983 in 2001 and $5948 in 2005. Find the rate at which tuition was increasing.
August 15, 2011

math
Determine if(3/8-1 is a solution to 8x-7y=10. Please show all of your work
August 15, 2011

math
4. Translate to an equation: p $25 potted plants and s $20 shrubs total $300 Graph the equation and use the graph to determine three different combinations of potted plants and shrubs that total $300. Submit your graph through the dropbox.
August 14, 2011

Math
Find the x- and y-intercepts and graph the equation plotting the intercepts. Please show all of your work. Submit your graph to the Dropbox 2x-3y=9
August 14, 2011

math
(8/3-1) is a solution to 8x-7y=10 . Please show all of your work
August 14, 2011

algebra
Can you sketch the y=x+9 equation?
August 12, 2011

maths
Starting from one oasis, a camel walks 25km in a direction 30 degrees south of west and then walks 30km toward the north to a second oasis. What distance separates the two oases?
June 6, 2011

english
What correction should be made to this sentence? Today's hikers prefer a shoe that is six inches high, is made of leather, and thick sturdy composition soles.
June 4, 2011

algebra 1
determine whether the graphs will be parallel,perpendicular, or neither...... y=2/3x-6 2x-4=3y
May 28, 2011

Science
What are the theoretical molar ratio values for Ag:Cu and Ag:AgNO3? Compare these values to the values you got in your experiment and compute a percent error for your work.
May 27, 2011

Math
If two number cubes are rolled, what is the probability of getting at least one even number?
May 18, 2011

MATH
In the equation 4*ABCDE= EDCBA each letter represents a different nonzero digit. Determines the sum A+B+C+D+E i don't know how to do this
May 6, 2011

Math
Given a+b+c+d=45 and a+2=b-2=2c=d/2 compute a+b+c-d
May 6, 2011

healthcare
What effect will the current governmental initiatives that focus on expanding health care coverage to more Americans have on health care costs and health care services in the United States? What would you add or subtract from the recently approved healthcare bill?
April 30, 2011

government
Younger Citizens
April 27, 2011

precalc
dont know how to find the derivitive
April 1, 2011

precalc
find an equation of the tangent line to the parabola at the given point..show work y=(-2)x^2 (-1,-2)
April 1, 2011

physics
Why does a gas become hotter when compressed by a piston in a cylinder?
March 31, 2011

calculus
can you please help me solve this problem if dy/dx=ycosx and y=3 when x=0, then y=
March 20, 2011

calculus
if dy/dt=-3y and if y=1 when t=0, what is the value of t for which y=1/3?
March 20, 2011

calculus
is the answer to find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3 is y=2x^2-1
March 20, 2011

physics
1.) A small sphere of charge 2.4 μC experience a force of 0.36 N when a second sphere of unknown charge is placed 5.5 cm from it. What is the charge of the second sphere? 2.) Two identically charged sphere placed 12 cm apart have an electric force of0.28 N between them. ...
March 20, 2011

precalc
Find the vector v with the given magnitude and the same direction as u. ||v||=7, u=3i+4j
March 13, 2011

reading
In 1984 by George Orwell, what do the 3 slogans (war is peace, ignorance is strength, freedom is slavery) mean? I would like to know what EACH suggests about the society. And how is the society able to get people to accept them as logical. I was thinking that they chose ...
February 28, 2011

PHYSICS
A 70 kg student traveling in a car with a constant velocity has a kinetic energy of 1.4 104 J. What is the speedometer reading of the car in km/h?
February 20, 2011

Maths - Calculus
Can anyone help with this...I need to find the derivative of the functions below. If possible please show working so I can try and understand? f(t) =3-t^4 and g(t)=sin(4t) Then using the Quotient Rule differentiate the function k(t) 3-t^4/ sin(4t) (0<t< pie)
February 13, 2011

Maths - Calculus
Can anyone help with this...I need to find the derivative of the functions below. If possible please show working so I can try and understand? f(t) =3-t^4 and g(t)=sin(4t) Then using the Quotient Rule differentiate the function k(t) 3-t^4/ sin(4t) (0<t< pie)
February 13, 2011

Physics
Hey, I thought about it a little more and I have your answer here. B = mu(naught) * I / (2pi * r) You can solve for I in that equation. I hope it looks familiar. mu(naught) = vacuum permeability I = current r = radius of wire
February 10, 2011

Physics
I won't be able to answer exactly, but we know that the net force on the wire would be zero. So it means that Force(gravity) = Force(magnetic)
February 10, 2011

English
What is a characteristic to describe a person who always follows a schedule? What is a characteristic to describe someone who always follows the law?
February 6, 2011

English
What is a characteristic to describe a person who always follows a schedule?What is a characteristic to describe someone who always follows the law?
February 6, 2011

geometry
I have a perimeter of 15. I am not a square . Each of my sides is 3 units long. What shape am i?
February 3, 2011

chemistry
how long will it take to decompose 38% of A at 25 degrees celsius?
January 30, 2011

Physics
The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kg-1. Assuming a uniform field, what is the value of the gravitational field strength in the region between the planet’s surface and P?
January 19, 2011

Physics
Two objects of equal mass m are separated by a distance r. Which expression gives the gravitational potential at the point P mid way between the two objects? The answer shows as -4Gm/r, but I can't see where this comes from.
January 11, 2011

Physics
A block weighing 6.8 N requires a force of 2.5 N to push it along at constant velocity. What is the coefficient of friction for the surface? A weight W is now placed on the block and 4.6 N is needed to push them both at constant velocity. What is the weight W of
January 8, 2011

chem
When an electric discharge is passed through boron trichloride a new compound is formed. what is its simplest formula if on analysis it is shown to contain .0878 g of chlorine and .0131 g of boron?
December 15, 2010

chem
a 6.54 g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. this mixture then reacts with barium chloride to for 3.50 g of silver chloride. calculate the percent by mass of silver nitrate in the first mixture
December 14, 2010

physics
9 m/s2
November 26, 2010

chemistry
What would happen if 50 grams of carbon fully reacted to oxygen?
November 16, 2010

Chemistry
how do you do this problem?!
November 14, 2010

Stats
A car insurance company has determined that 7% of all drivers were involved in a car accident last year. The company randomly selects 200 drivers. Compute the mean and standard devistion of the random variable, x, the number of drivers involved in accidents last year.
November 5, 2010

physics
S=u^2/2µs(g) S=(20.1168m/s)^2/2*.602*9.8 S=34.298m
November 1, 2010

physics
45 mi/h = 20.1168 m/s ma= .100n a = .100(g) solving for time v=vo + at 20.1168m/s=0+.98(t) t=20.527s solving for distance d=do+vot+at^2/2 d= 0+0+.98(20.527s)^2/2 d= 206.469m
November 1, 2010

chemistry
Cu + 2AgNO3-->Cu(NO3)2+ 2Ag 3.50/2 <--3.50
October 30, 2010

English---meaning??
"Submit a myth, or story, whose origins stem from your specific culture." what does specific culture mean??? For that requirement, what do I have to do???
October 30, 2010

Math 8th grade algerbra
How is the ratio of the volumes related to the ratio of corresponding dimensions?
October 27, 2010

trig
Find the values of the trigonmeric functions of t from the given information cos t = -4/5 terminal point of t is in quadrant III
October 26, 2010

chem--please help me check my answer!!
write an ionic and net ionic equation for the following reaction between Fe3+ and NH4OH. Please check my answer!! Thank you. My answer is: ionic: Fe3+(aq) + NH4OH--> Fe(OH)3 + NH4+ net ionic: Fe3+ +OH- -->Fe(OH)3
October 25, 2010

chemistry
Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C. i keep coming up withthe wrong ...
October 25, 2010

Chemistry
How do you work this one problem? Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C.
October 24, 2010

CHEMISTRY
really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A ...
October 24, 2010

chemistry
I really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A ...
October 24, 2010

Chemistry
Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 95.0oC and a mass of 67.0 g is dropped into a beaker of water containing 100 g at a temp. of 30.0oC. If the final temperature ...
October 24, 2010

Physics
An object with a mass of 2.728x10^1 kg is subjected to a force of 1.31851x10^3 N directed at an angle of 1.056x10^1 degrees from the x axis. A second force of 1.93826x10^3 N acting in the negative Y directions is also applied to the object. To two significant figures what is ...
October 22, 2010

physics
a kid goes down a slide, accelerating at 1 m/s^2 for 3 seconds. if he starts at rest, how long is the slide ? this is the equation i have but i need Xi which i have NO clue what it is .. Xf= Xi+ 0m/s(3s)+1/2 (1m/s^2)(3^2s) solving for Xf ... need Xi
October 19, 2010

chemistry
What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) 17.0 L CO2 x (1 moles O2/2 moles CO2) = 17.0 x (1/2) = 8.5 L did i do this problem correctly
October 17, 2010

college chemistry
What volume (in Liters) of hydrogen must react to form 17.0L of ammonia according to the following balanced equation: N2(g) + 3H2(g) --> 2NH3(g) Assume an excess of N2 and that all are at the same temperature and pressure.
October 16, 2010

Physics
space shuttle travels at about 7.4581x10^3 m/s. An astronaut takes about 1.5933x10^2 ms to blink an eye. How far does the space shuttle travel in that time, expressed to 4 significant figures?
October 14, 2010

Physics
A plane travels with a uniform velocity of 3.399x10^1 m/s for a period of 2.267x10^0 seconds. What distance is travelled during this time, in meters
October 14, 2010

stats
Mean is 60 and standard deviation is 7. what percentage is 73 and below.
October 12, 2010

Physics
A person walks 2.8597x10^1 m East, then turns around and walks 8.7898x10^1 m West. The total time to walk this distance was 4.4004x10^2 s. What is the velocity of the walker, expressed to 3 significant figures? Note: Your answer is assumed to be reduced to the highest power ...
October 11, 2010

Physics
A person walks 2.8597x10^1 m East, then turns around and walks 8.7898x10^1 m West. The total time to walk this distance was 4.4004x10^2 s. What is the velocity of the walker, expressed to 3 significant figures? Note: Your answer is assumed to be reduced to the highest power ...
October 11, 2010

physics
A block of mass 39 kg lies on an inclined plane, as shown. The horizontal and vertical supports for the plane have lengths of 36 m and 15 m, respectively, and the coefficient of kinetic friction between the plane and the block is 0.3. The magnitude of the force ~F necessary to...
October 6, 2010

physics
i got the correct answer but i still get any of the concept >.< i feel dumb ahhh oh oh any good sites to learn physics really good
October 6, 2010

physics
A descending elevator of mass 670 kg is uniformly decelerated to rest over a distance of6 m by a cable in which the tension is 8683 N.The acceleration due to gravity is 9.8 m/s2.Calculate the speed vi of the elevator at the beginning of the 6 m descent. Answer in units of m/s.
October 6, 2010

Physics
A mining operation excavates 5.482x10^4 metric tonnes of ore each hour. In an 12 hour production shift, how much ore is excavated in kg, to 2 significant figures?
October 3, 2010

Physics
A refinery recieves 4.23434x10^4 m3/h of crude oil. After the distillation process roughly 4.76216x10^1 % of the crude is converted to miltitary aviation fuel (JP4). What is the amount of JP4 produced in a day in L, expressed to 4 significant figures?
October 3, 2010

Chemistry
ok so 8.0x10^4 = 80000 tons 80000 = 176 369 809.75 pound =80 000 000 001 grams m = vxd = 80000x1.03g/mg
September 29, 2010

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