Friday
December 19, 2014

Posts by ABC


Total # Posts: 94

physics
A tank of compressed helium for inflating balloons is advertised as containing helium at a pressure of 2374 psi, which, when allowed to expand at atmospheric pressure, will occupy a volume of 194 ft3. Assuming no temperature change takes place during the expansion, what is the...
November 25, 2014

2 Math Questions
Sorry about the long name
November 6, 2014

Finance
Honey well international zero coupon bonds par value $1000 mature on April 21, 2012. Calculate the yield to maturity if an investor purchased one of these bonds on April 21, 2006, at a price of $650.
October 31, 2014

Thermodynamics
-180 69 C 563.5 550 550 b)
October 17, 2014

Map Rectangle
The scale of the map is 1:1000. What are the actual dimensions of a rectangle which appears as 4cm by 3cm on the map? What is the area on the map in cm2. What is the actual area in m2.
October 16, 2014

Map to sacle
The 17th hole at the famous St Andrews golf course is 420m in length. how long will it appear on a plan of course of scale 1:8000?
October 15, 2014

math
The 17th hole at the famous St Andrews golf course is 420m in length. how long will it appear on a plan of course of scale 1:8000?
October 15, 2014

Astronomy
1. 10^12 2. 30
June 19, 2014

physic
A cylindrical conductor of length l and uniform area of cross-section A has resistance R. What is area of cross section of Another conductor of the same material of length 2l and resistance R ?
May 16, 2014

Maths Probability
Ans for 3, 5 and 6? Anyone?
May 15, 2014

Maths Probability
3. 1.5 is incorrect :(
May 15, 2014

Astronomy
2.089*10^28
April 25, 2014

Probability
Let Zi=13Xi+23Xi+1 for i=1,2,…, and let Mn=1n∑i=1nZi for n=1,2,…. What value does the sequence Mn converge to in probability? Ans: 2
April 23, 2014

Math
When fX(x) = {2e−2x,if x>0, 0, otherwise, we have fY(y) = {g(y),if a<y, 0, otherwise. Give a formula for g(y) and the value of a using the standard notation. g(y)= a=
March 18, 2014

Math
When fX(x) = {1/3, if −2<x≤1, 0, otherwise, we have fY(y) = {g(y),if a<y≤b, 0,otherwise. Give a formula for g(y) and the values of a and b using standard notation. (In your answers, you may use the symbol 'e' to denote the base of the natural ...
March 18, 2014

Math
P(X>0.75)= 0.2266 P(X≤−1.25)= 0.1056 Can't figure out these: E[Z]= var(Z)= P(−1≤Y≤2)= anyone?
March 16, 2014

Math
Let X and Y be normal random variables with means 0 and 2, respectively, and variances 1 and 9, respectively. Find the following, using the standard normal table. Express your answers to an accuracy of 4 decimal places. P(X>0.75)= P(X≤−1.25)= Let Z=(Y−3)/4...
March 16, 2014

Probability
Let X and Y be normal random variables with means 0 and 2, respectively, and variances 1 and 9, respectively. Find the following, using the standard normal table. Express your answers to an accuracy of 4 decimal places. P(X>0.75)= P(X≤−1.25)= Let Z=(Y−3)/4...
March 16, 2014

probability
anyone know the answers to this?
March 11, 2014

Probability
has anyone figured out the answer for (c)??
March 7, 2014

chemistry
use the Henderson-Hasselbalch equation to calculate the pH of a buffer solution prepared by mixing equal volumes of 0.20 M NaHCO3 and 0.10M Na2CO3.(Ka=5.6x10^-11). how would you prepare NaHCO3-Na2CO3 buffer solution that has the pH of 10.40.
February 28, 2014

Calculus
¡ìdx/(x^2-1)^2
February 21, 2014

Calculus
¡ì(up:1 down:0) (x^3 dx)/(x^2+2x+1)
February 21, 2014

Calculus
y"-y'=sin x solve in undetermined coefficients
February 21, 2014

probability
Before leaving for work, Victor checks the weather report in order to decide whether to carry an umbrella. The forecast is “rain" with probability 20% and “no rain" with probability 80%. If the forecast is “rain", the probability of actually ...
February 12, 2014

probability
P(A) = 4/9 P(C) = 0 P(D) = 3/4 Anyone know the solution for the below?: P(B) P(A∩B) P(A∩D)
February 7, 2014

probability
P(D) = 0.75
February 7, 2014

Physics Classical Mechanics Help ASAP
fred for temp of 5 degrees celsius b) 55465.76 c) 24 percent
January 10, 2014

Physics Classical Mechanics Help ASAP
c) 24 percent
January 10, 2014

chemistry
Knowing that the energy associated with the formation of 1 mole of vacancies in copper (Cu) is 104 kJ, determine the vacancy density (nv/cm3) in Cu at 1085 K. Assume the pre-exponential factor is one. unanswered
November 17, 2013

chemistry
A p-n junction is obtained at a depth of 3 x 10-3 cm below the surface by diffusion of antimony (Sb) into p-type germanium. What is the donor concentration in the bulk germanium if the diffusion is carried out for three hours at 790 C? Express your answer in number of donor ...
November 17, 2013

chemistry
The Young's modulus for a material is 15.0 x 10^10 N/m2. The material is stretched to a strain of 6.0 x 10^-3. How much elastic energy will be expended? (Express your answer in J/m3)
November 17, 2013

chemistry
The Young's modulus for a material is 15.0 x 1010 N/m2. The material is stretched to a strain of 6.0 x 10-3. How much elastic energy will be expended? (Express your answer in J/m3)
November 17, 2013

chemistry
Knowing that the energy associated with the formation of 1 mole of vacancies in copper (Cu) is 104 kJ, determine the vacancy density (nv/cm3) in Cu at 1284 K. Assume the pre-exponential factor is one. unanswered
November 17, 2013

Physics Classical Mechanics
have you got answer of any one of your questions????? :p
November 14, 2013

Quantum Physics
what about others, please help rs and others..........
October 12, 2013

Quantum Physics
Q7 and 8 please
October 12, 2013

Math
Five weeks is how many seventy-thirds of a year
July 14, 2013

math calculus (please help me)
The marginal cost of a product is modeled by dC/dx= 16/cube root 16x + 3 where x is the number of units. When x = 17, C = 120. (a) Find the cost function. (Round your constant term to two decimal places.) c= (b) Find the cost of producing 90 units. (Round your answer to two ...
May 28, 2013

math 160(buss calculus)
The demand function for a product is given by p = 10,000 [1 − (5/5 + e^−0.001x)] where p is the price per unit (in dollars) and x is the number of units sold. Find the numbers of units sold for prices of p = $1000 and p = $1500. (Round your answers to the nearest ...
May 11, 2013

physics
its wrong!!!! tell the correct answer
April 30, 2013

physics
you son of bitc h go in your mother`s slit!!!!!11
April 30, 2013

physics
its wrong,,,,,,, tell the correct answer
April 30, 2013

Maths
thanxxxx
April 29, 2013

Quantum Physics
@abc did you got question 8D?
April 16, 2013

Quantum Physics
Anonymous, did you get all solutions for Q 7 and 8 except 8(D). If yes then please share......
April 16, 2013

physical
An electric field with a magnitude of 3.50 kN/C is applied along the x axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.7 m long assuming that (a) the plane is parallel to the yz plane; (b) the plane is parallel to the xy plane; (c) the plane ...
March 20, 2013

physics
A particle starts moving with acceleration 2 m/s2. distance travelled by it in 5th half second is..??
March 19, 2013

lab
How much 38%Hcl will be used to prepare N/3.05 solution in 2litre water.
January 18, 2013

Biology
bacteria
January 7, 2013

Algebra- Check Please
that isn't the answer, use substitution replacing y to the left of the equation 9/7x=-3x+12 solve this for x. then multiply the x you find by 9/7 to get the y
January 7, 2013

Math
x=green marbles y=blue marbles x+y=57 x+13=y b/c there are 13 more blue marbles substitute in to other equation x+(x+13)=57 then solve for x, then for y add 13 to x
January 7, 2013

math
you take the prize of the bag and divide that by the number of ounces, the lower of the outcomes gives you your answer
January 7, 2013

math
to AVG at least a 60 his total test scores must add up to 420 b/c 420/7=60. therefore you can add his current test scores and then subtract that number from 420 to find the minimum he can receive on the 7th test
January 7, 2013

Physics
On a frictionless table, a 3kg block moving 4m/s to the right collides with an 8kg block moving 1.5m/s to the left. If the blocks stick together, what is the final velocity? How much mechanical energy is dissipate in the collision?
January 1, 2013

discrete structure
Assume that Adam has 4 books to be bought. For each book, Adam can buy it from 3 different shops. Further assume each shop is unique. Using graph/tree graph,show the possible ways to buy all books starting from book 1 to book 4 in sequence.
December 13, 2012

linear programming math
A man owns two building supply stores, one on the east side and one on the west side of the city. Two customers order some 1/2 inch plywood. Customer A needs 50 sheets and customer B needs 70 sheets. The east side store has 80 sheets and the west side store has 45 sheets of ...
December 7, 2012

AP WORLD HISTORY
Increased the use of slavery: using it as a payment for slaves. Violence: people got drunk and violent
August 2, 2012

PHY
Eris, the largest dwarf planet known in the Solar System, has a radius R = 1200 km and an acceleration due to gravity on its surface of magnitude g = 0.77 m/s2. (a) Use these numbers to calculate the escape speed from the surface of Eris. 1360 m/s correct answer. (b) If an ...
July 5, 2012

Science
1. b 2. a 3. d 4. d
April 11, 2012

statistics
in 1000 tosses of a coin, 560 heads & 440 tails appear. is it reasonable to assume that coin is fair.
February 22, 2012

PHYSICS
A 30.0 KG LOAD IS BEING RAISED BY A FORCE OF 180N USING THE IDEAL PULLEY ARRANGEMENT SHOWN IN FIG, WHAT IS THE ACCELERATION OF THE LOAD? PLEASE HELP
December 18, 2011

PHYSICS
A 30.0 KG LOAD IS BEING RAISED BY A FORCE OF 180N USING THE IDEAL PULLEY ARRANGEMENT SHOWN IN FIG, WHAT IS THE ACCELERATION OF THE LOAD? PLEASE HELP
December 18, 2011

Finance
help the marketing manager decide which product promotion to implement
November 25, 2011

Finance
help the marketing manager decide which product promotion to implement
November 25, 2011

Corporate Finance
) A typical use of managerial accounting is to: help the marketing manager decide which product promotion to implement
November 25, 2011

spanish
please unscramble this spanish word: REGTARLNIA
September 8, 2011

chemistry
d = m/v = 16.3/85.2 = 0.191
August 29, 2011

math
If 2^x=3^y=12^z then show that 1/z = 1/y + 2/x
August 29, 2011

geometry
In the figure shown, NK and ML are parallel, JN=10 feet, NK=14 feet, JL=22 feet, and ML=24. Find KL.
February 3, 2011

algerba..plz help
A 400 g solution is 25% salt. How much salt must be added to produce a solution that is 40% salt?
December 7, 2010

math
Yup!
November 5, 2010

math
You just do 1/8 to find the percentage.
November 5, 2010

Grammar
Do your parents come from El Salvador?
November 4, 2010

geometry
a=46c
September 12, 2010

cpu
lim x infnitive (4x-1/2x+9)
July 1, 2010

math
lim x infinitive (4x-1/2x+9)
June 30, 2010

Math
lim x infnitive (4x-1/2x+9)
May 26, 2010

chemistry
Write a net equation for the reaction between aqueous solutions of HClO4 and NaH2PO4.
April 26, 2010

Electronic Timing inc
abc
March 30, 2010

Chemistry- Solubility Curves
who cares
March 10, 2010

6th grade
your introduction is important because this is where the reader decides if your story is boring or not. firstly you should have some sort of grabber to get the readers attention then you should go on to state your three reasons and try to make each a sentence. lastly you ...
March 8, 2010

9th grade
what citrus fruit will power a LED light bulb for the longest period of time.
March 3, 2010

Finance
20. TexMex Products is considering a new salsa whose data are shown below. The equipment that would be used would be depreciated by the straight-line method over its 3-year life, would have zero salvage value, and no new working capital would be required. Revenues and other ...
March 1, 2010

Statistics
Find the probability that at most 5 defective bolts will be found in a box of 200 bolts if it is known that 2 per cent of such bolts are expected to be defective .(you may take the distribution to be Poisson; e-4= 0.0183).
October 6, 2009

economics
Different market structures are prevailing in our different sectors like agriculture, power supply, transport industry, cement industry, restaurants, etc. Analyze and compare the characteristics of all market structure with respect to the given sectors.
January 1, 2009

world history
What are the legends about qutb minar?
August 9, 2008

social studies
what were politicians who supported a moderate tariff and federal help for the state called
January 12, 2008

poetry essay
I'm having problems coming up with a thesis statement for Edgar Allen Poe's poem The Raven. I have to do an analysis paper. Any suggestions on where to begin?
October 19, 2007

Lord of the Flies- English
What is the significance of Piggy's plea to join the expedition? -Thanks I have never read this book -- and don't plan to! But you can check at these sites for some ideas. www.sparknotes.com/lit www.pinkmonkey.com www.enotes.com www.gradesaver.com/classicnotes/titles ...
July 29, 2007

History
who was the Chinese philosopher that taught the importance of good moral character and take responsibility for their society? Confucius
May 31, 2007

English
I have to write a poetry analysis paper. I do not know how to start the first paragraph. Do I startwith telling the teacher what I'm writing on and then go into the different parts or should i take another approach? I'll give you some of the best links I've found. ...
April 20, 2007

math
Find the second derivative. y = sqrt(3x+4) I will be happy to critique your work. We don't do it for you. Thanks. Please post under one name. Thanks. who are u?
February 20, 2007

math
A widget factory has fixed costs of 35 billion dollars and variable costs of 781 million dollars per widget. The revenue (in $ billions) from selling x number of widgets is given by the following for x between 0 and 60. R(x) = 0.11 (60x - x2) What is the marginal profit (in $ ...
February 19, 2007

Pages: 1

Search
Members