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May 5, 2015

Posts by brian


Total # Posts: 635

Chemistry (Help)
1) atomic mass 2) molar mass 3) 6.02 x 10^23
February 4, 2007

mdu
3 to 4 questions that would lead to the country jamaica We are not going to do your homework for you. Find about Jamaica, and make the questions up You could ask -- The capital of this country is _________ Its location is ____latitude and _____ longitude. You can find many ...
January 31, 2007

science
A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls vertically. How far from the ...
January 30, 2007

Physics... Please help me
A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls vertically. How far from the ...
January 30, 2007

Physics... Please help me
A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls vertically. How far from the ...
January 30, 2007

Physics
A 0.165kg cue ball with an inital speed of 2 m/s bounces off the rail in a game of pool. For x and y axses located the counce reverses the y component of the ball's velocity but does not alter the x component(the angle is 30 in the negative x axis and it bounces across the...
January 30, 2007

Physics
A 75 kg man on a 39kg cart traveling at a speed of 2.3 m/s. He jumps off with zero horizontal speed realative to the ground. What is the resulting change in the speed of the cart? I tried using m1v1=m2v2 but that didn't work out since I was expose to get 4.4 m/s as the ...
January 30, 2007

calc
Verify that the function satisfies the three hypotheses of Rolle's Therorem on the given interval. Then find all numbers c that satisfy the conclusiton of Rolle's Theorem. f(x)= x*sqrt(x+6) [-6,0] f is continuous and differential f(-6) =-6*sqrt(-6+6) =0 f(0)=0 f(x) = ...
January 18, 2007

Calc
y=ln(x+1) +ln(x-1) find dy/dx I have trouble with this problem since i'm not that familar with finding the derivative when they involve ln. Please show me how to solve this problem. I should have gotten 2x/(x^2-1) The derivative of ln(x) is 1/x So, you obtain dy/dx = 1/(x+...
January 18, 2007

calc
y=ln(x+1) +ln(x-1) find dy/dx I have trouble with this problem since i'm not that familar with finding the derivative when they involve ln. Please show me how to solve this problem. I should have gotten 2x/(x^2-1)
January 17, 2007

physics
Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen) at what rate ...
January 11, 2007

physics
A block is moving down an incline a distance of 5 m form point A to point B by a force F that is parallel to the incline and has magnitude 2 N. The magnitude of the frictional force acting on the block is 10 N. If the kinetic energy of the block increases by 35 J between A and...
January 10, 2007

physics
During a rockslide, a 520kg rock slides from rest down a hillside that is 500m long and 300m high. The coefficient of kinetic energy between the rock and the hill surface is .25. a) If the GPE energy U of the rock –Earth system is zero at the bottom of the hill, what is ...
January 10, 2007

physics
Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen) at what rate ...
January 10, 2007

sentences
what if anything,is wrong with the following sentences? Carmen is tall, slender,and a woman of great beauty. Nothing is wrong with it that I can see. It is one sentence, so you should have ended the previous question with "sentence", not the plural. Writeacher should...
December 22, 2006

history
how would great Britain be affected if Americans closed their ports to the British ?
December 19, 2006

calc
Find the critical number(s) of f(x)= abs(2x-4) What is the derivative of abs(2x-4)? Is it abs(2)? No. You have to specify the domain of x. At x=2, this function has no derivative. At x>2, f' = d (2x -4)/dx= 2 at x <2, f'= d(4-2x)/dx= -2 You have to watch for ...
December 17, 2006

simplest form
10/12
December 11, 2006

physics
A crate slides down an incline right angled trough. The coefficient of kinetic friction between the crate and the trought is mew_k(not sure if i spelt it right). What is the acceleration of the crate in terms of mew_k theda and g? I think I need to use F=ma and then to find a ...
November 28, 2006

physics
On an incline plane (raised to 30 degrees) is a block A which has a mass of 10 kg. It is attached to a string which goes through a frictionless massless pulley. attached to the other end of the string is an other Block B. The coefficient of kinetic friction between the mass ...
November 28, 2006

Science (Chemistry)
Can someone explain why the ratio of magnesium ions to chloride ions in MgCl2 is 1 :2 Mg is in group IIA and has two electrons in its outside shell. Cl is in group VIIA and has seven electrons in its outside shell. Mg wants to lose two electrons; Cl wants to gain one electron...
November 15, 2006

Drug Abuse and Addiction
I need research sources for drug abuse and addiction. Thank you. Check these sources -- http://www.nida.nih.gov/ http://teens.drugabuse.gov/ (Broken Link Removed) http://www.drugabusestatistics.samhsa.gov/ http://www.mayoclinic.com/health/drug-addiction/DS00183 http://www....
November 12, 2006

Chemistry
Which element listed should have chemical properties similar to fluorine (F) A.Li B.Si C.Br D.Ne Br, along with F, a halogen (column 7 of the periodic table) Look at the periodic table. The columns are called groups. Elements in the same group have similar chemical properties.
November 9, 2006

History
Can you please give me a website where I can find information on Thomas Nast? http://en.wikipedia.org/wiki/Thomas_Nast WHAT KINDS OF CHANGES DID CHURCH CRITICS WANT TO MAKE? WHAT ROLE DID MARTIN LUTHER PLAY IN THE REFORMATION WHY DID LUTHER'S IDEAS LEAD TO WAR? LUTHER ...
November 4, 2006

Algebra 2
An Amtrak heading toward Boston at 90 miles per hour would go how far in eight and ahalf hours? asl? 17/M/MD Why?? 90 mi/hr x 8.5 hrs = ?? 765miles go to this site and sign up then add me as a friend:grab . com Mira_Me_Bien is my sn right. Note that in my equation the mi/hr x ...
November 1, 2006

chemistry
is the following sentence true or false? Mendeleev used his periodic table to predict the properties of undiscoverd elements.. True: Mendeleev used his periodic table to predict the properties of a undiscoverd element.
October 31, 2006

Fair and Impartial Jury?
Hello, I have a question on a study guide that I am not sure of the answer to: In a criminal case, does a defendant has the constitutional right to a fair and impartial jury? My instinct is to say yes, however, I looked at the 6th ammendement which states: "In all ...
October 28, 2006

horizontal asymptotes
find the HAs of y = (x-9) / sqr(4x^2 + 3x+ 2) What happens to y as x goes to +/- infinity? Specifically, is y approaching some limit from above or below? ?? I see your question was to just find the horizontal asymptotes and not to evaluate the function's approach to them. ...
September 27, 2006

calc
need to find: lim as x -> 0 of 4(e^2x - 1) / (e^x -1) Try splitting the limit for the numerator and denominator lim lim x->0 4(e^2x-1) (4)x->0 (e^2x-1) ______________ = ________________ lim lim x->0 e^X-1 x->0 e^x-1 Next solve for lim x->0 and simplify
September 26, 2006

chemistry
Consider the following balanced equation: 2 Na + 2 H2O ? 2 NaOH + H2 If 92.0 g of sodium reacts with 76.0 g of water until completion, which reactant will remain, and in what quantity?
September 24, 2006

chemistry
how many grams of H2 (g) are produced by the reaction of 1.35 g Al with 75.0 mL of 3.44 M HCl Here is the way to do most of these stoichiometry/limiting reagent type problems. Step 1. Write a balanced chemical equation. 2Al + 6HCl ==? 3H2 + 2AlCl3 Step 2. Convert what you have...
September 24, 2006

geometry
Point P is on the number number line. The distance between O and P is four times the distance between P and 30. What is the sum of two possible values of P? What are two possibilities for the coordinates? Let me make sure I understand what's asked. "Point P is on the ...
September 7, 2006

math
what are intregars? how do they work
August 17, 2006

Help on finance
Donna and Sherman Terrel are preparing a budget for 2003. Donna is a systems analyst with an airplane manufacturer, and Sherman is working on a master's degree in educational psychology. The Terrels do not have any children or other dependents. Donna estimates her salary ...
June 11, 2006

biology
DIE!
August 16, 2005

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