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December 21, 2014

Posts by shawn


Total # Posts: 486

Physics
E2 (total) of rod (of length L = 9.15 mm) = 4.18 ×10^3 V/m. E1=1.76 x 10^3. E3=1.57 x 10^3. The rod consists of three sections of the same material but with different radii. The radius of section 3 is 2.27 mm. What is the radius of (a) section 1 and (b) section 2? If ...
March 28, 2010

12th grade
factor completely x^4-16=0
March 7, 2010

algebra
(2x^2-8x-42)/6x^2=(x^2-9)/x^2-3x How do you solve this problem? Please list the steps.. Thank You
January 27, 2010

Chemistry
Rank these acids from weakest to strongest: H2C2O4, HCO3-, H2PO4-, HCOOH.
January 11, 2010

Physics
The driver accelerates a 240.0 kg snowmobile, which results in a force being exerted that speeds up the snowmobile from 6.00 m/s to 28.0 m/s over a time interval of 60.0 s. b. What is the snowmobile's change in momentum? What is the impulse on the snowmobile? c. What is ...
January 6, 2010

college
closing inventory (under perpetual system): 125,000 x 30% = $37,500 (Income statement and bal sheet) Sales Revenue : $162,500 (Income Statement) Cost of goods sold (expense): 125,000 x 70% = $87,500 (Income Statement) Gross profit: 162,500 - 87,500= $75,000 (Income statement) ...
December 30, 2009

Chemistry
Suppose that 2.00 mol of HNO2 is dissolved in 1.00L of water at 25 degrees C. Because HNO2 is a weak acid, it is in equilibrium with the ions, H+ and NO2-. What are the concentrations of these ions at equilibrium?
December 28, 2009

Chemistry
A l.00L flask contains 4.40mol of HI at a certain temperature. The Keq at this temperature is 5.0 * 10^-4. What are the concentrations of H2 and I2 at equilibrium?
December 28, 2009

Chemistry
Which value of Keq indicates most favorability of product formation, Keq = 1 * 10^12, Keq= 1.5 or Keq= 5.6 * 10^-4?
December 28, 2009

Physics
25
December 21, 2009

physics
A broom handle has a length of 1.67m and a mass of 580g with the axis rotation through the center. (what is this problem asking me to do?)
December 16, 2009

AP Chemistry
I have no idea where to start with this problem: A certain reaction has the following general form: aA -> bB At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus time resulted in a ...
December 8, 2009

Ap Chemistry
I have no idea where to start with this problem: A certain reaction has the following general form: aA -> bB At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus time resulted in a ...
December 8, 2009

Physics
A bolt is to be tightened with a torque of 8.0 N*m. If you have a wrench that is 0.35 m long, what is the least amount of force you must exert? the equation for this problem is t=Fr sinbeta, but the sin is not given What am I suppose to do?
December 6, 2009

Math
So after i do all that should i get one whole number
November 29, 2009

Math
What is the probability that a number chosen at random from the range 1,000,000,000 to 9,999,999,999 inclusive will contain ten different digits? Round your answer to the nearest millionth
November 29, 2009

Calculus
A rectangular box with a square base and top is to be made to contain 1250 cubic feet. The material for the base costs 35 cents per square foot, for the top 15 cents per square foot, and for the sides 20 cents per square foot. Find the dimensions that will minimize the cost of...
November 29, 2009

math
A rectangular box with a square base and top is to be made to contain 1250 cubic feet. The material for the base costs 35 cents per square foot, for the top 15 cents per square foot, and for the sides 20 cents per square foot. Find the dimensions that will minimize the cost of...
November 29, 2009

physics
A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.17 and the push imparts an initial speed of 4.1 m/s?
November 19, 2009

possessive nouns
A ____ kindness kept them alive another day. Is it A. strangers B. stranger's C. strangers' D. strangers's Is it b. stranger's
November 2, 2009

possessive nouns
____ Jews fled from the German soldiers. Is it A. Polands B. Poland's C. polands' D. Polands's Is it b. Poland's
November 2, 2009

possessive nouns
______ stories seemed unbelievable. Is it A. Survivors B. Survivor's C. Survivors' D. survivors's Is it b. Survivor's
November 2, 2009

possessive nouns
Many ____ stomachs were often empty. A. refugees B. refugee's C. refugees' D. refugees's Is it c. refugees'
November 2, 2009

possessive nouns
Soldiers carried several ___ cold rations. Is it A. days B day's C.days' D. days's My answer is c. days'
November 2, 2009

possessive nouns
Success often depended on the ____ food suply. Is it A. armies B. armie's C. armys' D. army's I say it is d. army's
November 2, 2009

possessive nouns
Is it b. soldier's
November 2, 2009

possessive nouns
A _____ shoes wore out quickly. Is it A. soldiers B. soldier's C. soliers' D. soldiers's
November 2, 2009

possessive nouns
I chose c because I thought I should make it plural. is the correct one is b. poland's
November 2, 2009

possessive nouns
Is it c. Polands'
November 2, 2009

possessive nouns
I think it is D. Polands's
November 2, 2009

possessive nouns
_____ Jews fled from the German solders. Is it A. Polands B. Poland's C. Polands' D. Polands's
November 2, 2009

possessive nouns
American ______ efforts helped win the war. Is it A. soldiers B. soldier's C. soldiers' D. soldiers's
November 2, 2009

Chemistry
What type of chemical reation is : Na + H2O---) NaOH + H2? The 2s are subscripts but I couldn't get it to type that way.
October 28, 2009

Social Studies
is there freedom in massachusetts
October 17, 2009

Ap Chemistry
Hydrogen gives off 120. J/g of energy when burned in oxgyen, and methane gives off 50. J/g under the same circumstances. If the mixture of 5.0 g of hydrogen and 10. g of methane is burned, and the heat released is transferred to 50.0 g of water at 25.0 degress Celsius, what ...
October 17, 2009

physics
Is it possible for a car to move in a circular path in such a way that it has a tangential acceleration but no centripetal acceleration?
October 9, 2009

algebra (excel)
I am trying to create a forumla that will subtract two columns and in the third column tell me if the one column is greater than the other column by 10%. So far I have IF(AND(A:A-B:B>(10%)*(A:A)=TRUE),C2,"FALSE") which is giving me false for everything but I know ...
September 16, 2009

math
What is the greatest common factor of 102 and 214?
August 16, 2009

Social Studies
what are some of the challenges caused by immigration?
May 20, 2009

American History
1.True 2.A 3.B 4.D 5.A 6.True 7.c. 8.False 9.True 10False 11.A 12.True 13.True 14.D 15.A 16.C 17.False 18.C 19.True 20.true 21.C. 22.A. 23.B 23.B.
May 14, 2009

American History
1.True 2.A 3.B 4.D 5.A 6.True 7.c. 8.False 9.True 10False 11.A 12.True 13.True 14.D 15.A 16.C 17.False 18.C 19.True 20.true 21.C. 22.A. 23.B 23
May 14, 2009

Science
Why do non-polar substances tend to boil at relatively low temperatures?
May 14, 2009

english
how do you describe an authors writing style and structure?
May 10, 2009

math
18 inches is the answer to the first question because you must be 48 but you are only 30 now, you must grow 18 (48-30) 1,010 is the answer to the second question, 840+1,150=1990 but you can only eat 3,000-1,990 now which is 1,010 :)
March 14, 2009

psychology
1. The experimental rats were being raised in separate environments. One group lived in the traditional cage in a quiet, but well lighted room. They were supplied with plenty of food and water. The second group inhabited "Rat Disney Land." There were colorful ...
March 13, 2009

college precal
find all the values: sin2x- sqrt3cosx=0
December 12, 2008

sci/275
Review Ch. 5, The Flow of Energy Through Ecosystems. Then, complete Appendix C. · Post your response to the following: Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix C. How ...
December 9, 2008

Algebra check
Where appropriate, include the approximation to the nearest ten-thousandth. 27.) log x = -3 I have the answer as 1 28.) 7 ^(4-9x)= 49 I have the answer as 2/9 29.) 8^x =5.2 not sure 30.) 1n x=5/8 not sure Are these answers right?
December 1, 2008

Algebra help
Thanks
December 1, 2008

Algebra help
State the domain and the range of each function. 22.) f(x)=e^x +3 the +3 is separated 23.) g(x)= 1n(x-1)
December 1, 2008

Math help
Okay x^2-4 = 4 x^2= 8 sqrt(x^2)= sqrt 8 x= 2.83 is this right?
December 1, 2008

Math help
Where appropriate, include the approximation to the nearest ten-thousandth. 31.) log(x-4)+ log(x+4)= log4 I have the answer as 4 Is this answer right?
December 1, 2008

Algebra help 2
27.) x=1 28.) I have x= 2/9 Not sure about the last two 29.) 8^x =5.2 not sure 30.) 1n x=5/8 not sure
December 1, 2008

Algebra help 2
Where appropriate, include the approximation to the nearest ten-thousandth. 27.) log x = -3 I have the answer as -3 28.) 7 ^(4-9x)= 49 I have the answer as 2 29.) 8^x =5.2 not sure 30.) 1n x=5/8 not sure Are these answers right?
December 1, 2008

Algebra Thanks
Thanks
December 1, 2008

Algebra help bobpursley
Where appropriate, include the approximation to the nearest ten-thousandth. 24.) 3^x= 1/81 I have x = 1/5 25.) logx 125 =3 I have x = 5 26.) log64 x = 1/2 I have x = 8 Are these answers right?
December 1, 2008

Algebra
Where appropriate, include the approximation to the nearest ten-thousandth. 24.) 3^x= 1/81 I have x = 1/5 25.) logx 125 =3 I have x = 5 26.) log64 x = 1/2 I have x = 8 Are these answers right?
December 1, 2008

Algebra
Where appropriate, include the approximation to the nearest ten-thousandth. 24.) 3^x= 1/81 25.) logx 125 =3 26.) log64 x = 1/2
December 1, 2008

Algebra help
State the domain and the range of each function. 22.) f(x)=e^x +3 23.) g(x)= In(x-1)
December 1, 2008

Algebra
actually the +3 is separte so it is f(x)= e^x +3 and the second problem is g(x)= In(x-1)
December 1, 2008

Algebra
State the domain and the range of each function. 22.) f(x)=e^x +3 23.) g(x)=1n(x-1)
December 1, 2008

Algebra help
Okay I got it log (8/3) = log 8 - log 3 = 2.079 - 1.099 = 0.98 log 24 = log (3x8) = log 3 + log 8 = 3.688 log 25 = log 5^2 = 2 log 5 = 2.138
December 1, 2008

Algebra help
If loga 8=2.079, loga 5=1.609, and loga 3=1.099, find the following? 19.) loga 8/3 is this 1.89? 20.) loga 24 Not sure 21.) loga 25 not sure how to do this
December 1, 2008

Algebra help
Thanks
December 1, 2008

Algebra help
Simplify: Note: The first letters next to log are the small letters. 16.) logr r 17.) logt t^4 18.) logb 1
December 1, 2008

Algebra help
Okay thanks
December 1, 2008

Algebra help
Express in terms of logarithms of a, b, and c: log(a^3b^2)/c How would I convert this?
December 1, 2008

Algebra help
Thanks
December 1, 2008

Algebra help
Find the formula for the inverse of each function. 4.) g(x)= (x+5)^3 I do not understand how to do this one.
December 1, 2008

Algebra check
Thanks
December 1, 2008

Algebra check
Convert to exponential equations. 12.) m=log3 9 I have the answer as 3^m =9 13.) log2 64=6 I have the answer as 2^6 =64 Are these answers right?
December 1, 2008

Algebra check Reiny
So then are these answers right? 10.) 4^-3 =1/64 I have the answer as log4 1/64 =-3 11.) 144^1/2 =12 I have the answer as log 144^12 =1/2
November 30, 2008

Algebra check DrBob222
I have a question the formula that I used was b^y=x means that logbx=y is this the correct formula? so using that formula I got the following. 4^-3 =1/64 I have the answer as log4 1/64 =-3 144^1/2 =12 I have the answer as log 144^12 =1/2
November 30, 2008

Algebra check
Thanks.
November 30, 2008

Algebra check
Convert to Logarithmic equations. 10. 4^-3 =1/64 I have the answer as log4 1/64 =-3 11. 144^1/2 =12 I have the answer as log 144^12 =1/2 Are these answers right?
November 30, 2008

Algebra inverse question
Hi Reiny, I just have one question for 4.) the problem is g(x)= (x+5)^3 how were you able to convert the equation to the following? let y = (x+5)^2 interchange x with y x = (y+5)^2
November 30, 2008

Algebra inverse
Find the formula for the inverse of each funtion. 3.) f(x)= 2x-5 for this one I have y= (x+5)/2 is this correct? 4.) g(x)= (x+5)^3 I am stuck on this one.
November 30, 2008

Thanks
Thanks
November 30, 2008

Algebra check Damon
Not a function but is it one to one?
November 30, 2008

Algebra check
Determine whether f(x)=x^2 is one to one. I have the answer as yes. Is this right
November 30, 2008

Algebra check
Determine whether f(x)=x^2 is one to one. When I substitute values in for x even when I use negative values x^2 will be positive so is it one to one?
November 30, 2008

Algebra help drwls
for f of g(x) I have -4x^2-10x-6 Is this right?
November 30, 2008

Algebra help
Find (fog)(x)and (gof)(x)if f(x)=x-x^2 and g(x)= 2x+3. Okay so I did the following: For f(of)g(x), take (2x+3) - (2x+3)^2 (insert g(x) where the "x" is in f(x) ) For g(of)f(x), take 2[x-x^2] +3 The first answer that I get for (2x+3) - (2x+3)^2 is -4x^2-12x-9 The ...
November 30, 2008

Algebra help
Find (fog)(x)and (gof)(x)if f(x)=x-x^2 and g(x)= 2x+3.
November 28, 2008

Algebra word problem help
Thank you. I was able to get the same answers.
November 21, 2008

Algebra word problem help
The average walking speed R of people living in a city of population P,in thousands, is given by R=0.37InP+0.05, where R is in feet per second. a.) The population of Honolulu, Hawaii is 395,790. Find the average walking speed. b.) A city's average walking speed is 2.70 ft/...
November 21, 2008

6th geography kinda in a hurry
whoops i meant NYG to arizona not TN
November 20, 2008

6th geography kinda in a hurry
Number the rivers in the sequence the NY giants will cross them en route to the valley of the sun(Tennessee) Arkansas Delaware Hudson Illinois mississippi Missouri Ohio Rio Grande
November 20, 2008

6th geography
Yeah i have 2 more that i cant find: can you answer (or atleast help with) these questions- Number the rivers in the sequence the NY giants will cross them en route to the valley of the sun(Tennessee) And (the other question is much more important)what 5 states cover the area ...
November 20, 2008

6th geography
your a life saver
November 20, 2008

6th geography
what is the shallow part of the sea off the coast of Boston called?
November 20, 2008

Math Algebra check Thanks
Thanks
November 10, 2008

Math Algebra check please
Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w is this right?
November 10, 2008

Math help
Did I find this out correctly?
November 10, 2008

Math help
Solve: x-(3/x)<0 is the answer(-infinity, -sqrt3)U(0,sqrt3) ?
November 10, 2008

MAth answer check
One solution of kx^2 +6x-k=0 is -3. Find the other solution I have the answer as -1/3 is this right?
November 10, 2008

Algebra problem
Which of the following points is an x-intercept of the graph of f(x)=(x^2+2x)^2 -11(x^2+2x)+24? a.)(4,0) b.)(-6,0) c.)(6,0) d.)(-4,0)
November 10, 2008

Math check please
Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w
November 10, 2008

Math Help please answer
I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w
November 9, 2008

Math Help please
Solve w= (va)/(r^2+a^2) for a. is the answer a= sqrt[w(r^2+v^2)/v]?
November 9, 2008

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