Thursday
October 30, 2014

Posts by BB


Total # Posts: 109

Physics
A Car moving North at 9 m/s strikes a stationary car of equal mass. The first car moves off after the collision at an angle of 30 degrees West of North, with a speed of 6 m/s. What is the speed of the second car after the collision? My resources have poor explanation of what ...
September 18, 2014

physical chemistry
q = mcdT 72 400 = 752 X C X 9.95 C = 9.676 J/C
July 21, 2014

physics
A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball approaches the cushion with a velocity of +2.30 m/s and rebounds with a velocity of -1.90 m/s. The ball remains in contact with the cushion for a ...
November 11, 2013

chemistry
In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. How many molecules of substance B are produced when 26.5 g of substance A reacts? The molar mass of substance A is 21.9 g/mol. Step 1: Convert the mass of A to moles. Step 2: ...
September 24, 2013

Chemistry
What is the percent ionization of a solution prepared by dissolving 0.0286mol of chloroacetic acid, in 1.60L of water?for choloroacetic acid, Ka=1.4x10^-3
March 22, 2013

Chemistry
what is Kc at 25 celsius for the following equilibrium? CH3BH3^+ +H2O <==> CH3NH2 + H3O^+ Kb=4.4x10^-4 I got 4.0x10^4 / 1.0x10^-14 = 4.0x10^-10 (correct)?
March 22, 2013

Chemistry
the ka of hypochlorous acid hclo is 3.5 x 10^-8. What is Kb for the hypochlorite ion?
March 21, 2013

Chemistry
what is the Ka for ethylammonium cation,C2H5NH3^+, at 25 celsius?(Kb for C2H5NH2=4.7x10^-4 at 25 Celsius)
March 21, 2013

geometry
A parallelogram ABCD has perimeter equal to 124. Let E be the foot of the perpendicular from A to BC, and let F be the foot of the perpendicular from A to CD. If AE=7 and AF=24, what is the area of the parallelogram?
March 12, 2013

chmistry
balance each of the following chemical equations ,using the change in oxidation number method. cu +h2so4=cuso4+so2+h2o
February 14, 2013

chemistry
h2s + HNO3 -->s+ no+H2O balance by oxidation number change
February 14, 2013

chmistry
3O2(g)---> 2O3(g) Delta H = +284.6 kJ what is the sign of delta G and delta S
February 5, 2013

physices
A sound wave has a wavelength of 3.0 m.? The distance from a compression centre to the adjacent rarefaction centre is:
February 4, 2013

physices
A sound wave has a wavelength of 3.0 m.
February 4, 2013

a person stands on a bathroom scale that rest on t
a person stands on a bathroom scale that rest on the floor of an elevvator. when the elivetor is stationary the scale registers 50kg. when the lift acclelerates up ward the scle registers 60kg .taking g=10m/s^2, the best estimate acceleration of the lift is ;
February 4, 2013

calculus
f(x) = (3x^3+5x^2+8x-8)/x find the derivative
January 31, 2013

Math
hate it
January 20, 2013

PHYSICS 1 ..
The distance is 18.3. 6.3+4+3+5
November 25, 2012

chmistry
a solutiona solution is made by dissolving 3.75g of a pure nonvolatile solute in 95g of acetone. the boiling point of pure acetone was observed to be 55.95 Centigrade that,and that of the solution was 56.50 Centigrade.if the molar boiling point elevation constant(Kb)of acetone...
November 20, 2012

calculus! please help
simplify tan^2 theta + 1/ tan^2 theta csc2 theta –1 ~ tan2 theta ~ 1
May 27, 2012

Math
40,000 meters
April 5, 2012

Physics help please!!!
i did the same way how you should me but i keep getting a wrong answer :/
March 29, 2012

Physics help please!!!
thats wrong
March 29, 2012

Physics help please!!!
In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the kind used in smallpox vaccine). The procedure involved measuring the frequency of oscillation of a tiny sliver of silicon (just 28.0 long) with a ...
March 29, 2012

Physics help
A light rope is wrapped several times around a large wheel with a radius of 0.435 m. The wheel? A light rope is wrapped several times around a large wheel with a radius of 0.435 m. The wheel rotates in frictionless bearings about a stationary horizontal axis. The free end of ...
February 27, 2012

chemistry
A 0.12-mole sample of nitrogen gas occupies a volume of 2.55 L. What is the volume of 0.32 mol of nitrogen gas under the same conditions?
December 9, 2011

Chemisrty
Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in mole fraction of the condensed ...
December 1, 2011

business
how to do Legal Research for this Issue Employment Discrimination 2. Textbook reference: Chapters 5, 35 3. Possible search terms: ethics, employment discrimination, Title VII, past discrimination 4. Here is the situation: ABC Corporation decides to respond to what it sees as a...
November 28, 2011

English
Serious is to careful as nervous is to____________
September 11, 2011

7th grade math
that's a dumb question oh well 16
August 25, 2011

Genetic engineering and Gene splicing
what's the difference between genetic engineering and gene splicing?
May 23, 2011

plagiarism workshop
Now that you have developed an in-text citation for a summary, paraphrase, and a direct quote, and created a reference for the paragraph provided in Exercise 2, reflect on the thought processes you used for each aspect. How did your approach differ when writing each? What ...
May 12, 2011

College Chem I
Gh
May 2, 2011

geometry
If a quadrilateral has 4 congruent sides and congruent diagonals. Could it immediately be concluded to be a square?justify the answer. If not was is a counterexample
March 30, 2011

Insurance Forms
I need help with a few questions. Could you let me know if I'm going in the right direction. 1- CHAMPVA would be considered a primary payer for a patient who has ______ coverage. A- Medicaid B- fee-for-service C- Medicare D- SSI Answer: A 2- You should record payments that...
March 15, 2011

childcare
wrong
February 1, 2011

math
Find the age, to the nearest month, of the people in your class. Use the average age in months as your zero and positive and negative numbers to write the age of each person in relation to the average. Work in a group to find a good visual way to display this information. ...
December 13, 2010

MATH
you have 4 blue crayons, 2 red and 3 orange, what is the probablity of pulling a red crayon and then an orange without replacement?
December 10, 2010

uop
Choose some numbers and work in a small group to figure out how to apply the tests for divisibility by 4, 6, 7, 8, 9, and 11 given on pp. 211–214. a. Use a calculator to select some numbers that are and some that aren’t divisible by these numbers. Give an example to ...
December 8, 2010

math
While performing a calculation, you divide a number by 5 two times to get the answer 12. You should have divided by 5 only once. What is the correct result of the calculation
December 1, 2010

math
suppose square was not a word used in mathematics. How would you descibe the shape that the word represents?
November 10, 2010

math
ã10(ã11-ã7) can you help me multiply and simplify
October 13, 2010

math
ã10(ã11-ã7) can you help me multiply and simplify
October 13, 2010

com 155
Write a 100-word passage to Susan Anker, the author of the course’s textbook, in which you describe five details from her book that are good and five details about the book that are written well.
September 26, 2010

English
adverb prepositional phrase
September 23, 2010

algebra 1
simplify the following fractions by rewriting them in factored form and finding all the "ones" you can....plis help.. 42/60, 16/80, 51/17, 7/33...
September 19, 2010

Biology
I need help with a couple of questions. I have included what I think the answers are. Could you let me know how I did? 1- A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results show an elevated eosinophil level. ...
September 8, 2010

Health
I was wondering if anyone could help me with these questions. I have put what I feel are the correct answers. Please let me know if I did ok & thanks. 1- A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results show an...
September 8, 2010

AP Chemistry
Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is given below. C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 (a) What mass of acetic anhydride is needed to completely consume 4.40 102 g salicylic acid? What is the ...
August 30, 2010

English
df
June 24, 2010

geometry
find "d" in the radical form of a right square pyrmid with equilateral triangular faces. I have three measurements of 8.
June 16, 2010

algebra: please check
p/3-3p/8=3 p-3p/8=9 p-3p=72 -316 I am not sure if I did this right. Just guessing.
June 10, 2010

Algebra HELP:(
8x+(-10)=750 8x=760 x=95 y=95(3)=285 w=95 L=285
June 8, 2010

Algebra HELP:(
I am terrible at word problems. How do I work this? A large park is to be built in the shape of a rectangle. The length is to be 5 m shorter than three times the width. The perimeter of the park is to be 750 m. What will be the length and width of the park?
June 8, 2010

Algebra: did I do this right
find the other endpoint of a line segment with the given midpoint (6,4) endpoint ((3, 5). 6= 3/2 and 4 = 5/2 12=6 and 8 = 10 12-6 and 8 - (-10) End Point = (6, 18)
June 8, 2010

math
List all the subsets of S. You may use "C" for chocolate, "V" for vanilla, and "M" for mint. 1. {} 2. C 3. V 4. M 5. CV 6. CM 7. VC 8. VM 9. MC 10.MV 11. CVM Is this correct.
April 15, 2010

Astronomy
The great galaxy in Andromeda has an angular diameter along its long axis of about 5 degree. Its distance is about 2.2 million light years. What is its linear diameter?
March 29, 2010

college
Two parallel plates, each with zero mass and an area of 10,000 cm2 are set 0.1 mm apart and the space between them is filled with a Newtonian fluid. The upper plate is pushed in the direction shown with a constant force sufficient to accelerate a mass of 1 kg by 1 m/s2, which ...
March 28, 2010

phi 105
What are key differences between the ontological, teleological, and cosmological arguments? Identify the philosopher who you think best supports his or her argument. The Ontological argument states that God exists in the understanding but not in reality. Anyone that considers ...
March 9, 2010

Chemistry
I have to convert the following pressures into torr: 1. 2.48x10^-3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]
March 6, 2010

chemistry
I have to convert the following pressures into torr: 1. 2.48x10^-3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]
March 6, 2010

chemisty
I have to convert the following pressures into torr: 1. 2.48x10^-3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]
March 6, 2010

physics
I am getting 0.144 nm for this but I didnt make use of the force. Do you have to use the force? A force of 4.6 x 10-15 N acts between an electric dipole with dipole moment 2.3 x 10-29 C m and an electron. How far away from the dipole is the electron located when it travels ...
February 6, 2010

math
Describe what happens to the three points of concurrency that determine the Euler line when the triangle is (a) isosceles, (b) equilateral.
January 24, 2010

college
The expected number of heads in 160 tosses of an unbiased coin is ___.
September 14, 2009

language arts
I am looking for a word that discribes this. This makes a room messy, carries a sick person, or is another name for a lot of puppies.
August 18, 2008

literary
you can mix things in it, hold briks together with it, or fire it.
August 18, 2008

algebra
(8x-6) - (4x-5)
March 31, 2008

Toulmin Model Anyone?
* Claim: Allowing guns on campus stops or deters school shootings. * Data: Recent school shootings (45 since '96) weren't stopped and no one else had a gun. * Warrant: If guns were allowed someone probably would have shot the perpetrators. * Backing: none Am I even ...
March 24, 2008

Comm. Arts
Toulmin Model and Campus Gun Control? I'm getting really confused about this. I need to break down an article according to the toulmin model within the next few hours. It's about gun control on campuses. So far I've got: Claim: Guns should be allowed on campuses ...
March 24, 2008

algebra
is this right? Divide and check: 12x^3y^2/2x^5y^2 answer: 6x^-2
February 6, 2008

algebra
Is this correct? subtract (4a^3+2b^3)-(6a^3+5a^2b-2ab^2+2b^3) answer: -2a^3-5a^2b+2ab^2
February 6, 2008

algebra
(v+3)
February 6, 2008

algebra
Factor c^2+3c-54 v^2-4v-21
February 6, 2008

Algebra
The denominator of a fraction is 2 less than twice the numberator. If the numerator is decreased by 2 and the denominator is increased by 3, the resulting fraction simplifies to 1/3. Find the original fraction. Have no idea what to do.
February 5, 2008

algebra2
Suppose it takes 3 days for a space vehicle to travel from Earth to the moon. About how long would it take for the same vehicle traveling at the same speed to Jupiter? Moon - 240,000 mi Jupiter - 391,000,000. The space vehicle would take how many days to reach Jupiter?
February 2, 2008

math
2(4x-4) + 2(8x+10)= Perimeter
January 30, 2008

READING
North America, South America, Asia, Europe, Australia, Antartica, Africa
January 30, 2008

algebra
Thank you very much. It helped me not only on that problem but others as well. :)
January 30, 2008

algebra
What is the common denominator? 3 2 - + - 1 a-1 ------- 4 3 - - - 1 a+1
January 30, 2008

geography
Is there a certain rhyme out there to help study state capitals?
January 24, 2008

algebra
Find the slope and y-intercept x=-9 a) slope:0;y-intercept: (0,-9) b) slope: undefined; y-intercept: (0,-9) c) slope: 0;y-intercept:none c) slope: undefined;y-intercept:none
January 15, 2008

algebra
Solve the system by graphing. x+y=4 -x+y=2 How do I graph this?
January 10, 2008

algebra
The length of a rectangle is 9 in. more than twice its width. If the perimeter of the rectangle is 48 in., find the width of the rectangle. a) 4 in b) 5 in c) 6 in d) 7 in
January 10, 2008

algebra
Rewrite the equation 2x-3y=-6 A) f(x)=2/3x+2 b) f(x)=3/2x-3 c) f(x)=3/2x-6 d) f(x)=2/3x+6
January 10, 2008

Algebra 1
Solve the following system by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent. 10x+2y=7 y=-5x+3
December 27, 2007

algebra
Theater tickets are $8 for general admission and $5 for students. During one evening 240 tickets were sold, and the receipts were $1680. How manny of each ticket was sold? This is what I have before I get stuck: G=8 S=5 8(240-S)+5S=1680 1920-S+5S=1680 Now what?
December 26, 2007

algebra
Solve the following by graphing: 2x - y = 4 2x - y = 6
December 26, 2007

algebra
Is this right if I substitute -2 for x? f(x)=x^2-7x=10 f(-2)=-2^2-7(-2)+10 f)-2)=-4-(-14)+10 f(-2)=-8
December 15, 2007

algebra
Would it be a solid line or a dotted line?
December 15, 2007

algebra
I came up with f=-5, -7 and -1 and now I am lost. Thanks.
December 15, 2007

algebra
Can you enlighten me as how to graph this equation? Thanks
December 15, 2007

algebra
f(x)=-2x-5
December 15, 2007

algebra
Is f(x) = 3 over 4x + 11 over 4 the correct answer? 3 over 4 is a fraction and 11 over 4 is a fraction.
December 15, 2007

algebra
I need to rewrite the function of x in the equation -3x+4y=11
December 15, 2007

algebra
-3x+4y=11
December 15, 2007

algebra
Thank you so much I came up with an answer of 28 after some struggling.
December 15, 2007

algebra
Is this right if I substitute -2 for x? f(x)=x^2-7x=10 f(-2)=-2^2-7(-2)+10 f)-2)=-4-(-14)+10 f(-2)=-8
December 15, 2007

algebra
Is this right for the third one? f(-2)=-2^2-7(-2)+10 f(-2)=-4-14+10 f(-2)=-8
December 15, 2007

algebra
f(x)=x2(squared)-7x+10, find (a)f(0), (b) f(5), and (c) f(-2)
December 15, 2007

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