Friday
October 31, 2014

Posts by karl


Total # Posts: 75

trigonometry
A barge is being towed south at the rate 2 km/hr. A man on the deck walks from west to east at the rate 4ft/s. Find the magnitude and direction of the man's actual velocity.
August 7, 2014

trigonometry
A box of 200kN is placed on a smooth inclined plane 28° with the horizontal. To prevent the box from sliding down the plane, a rope is tied to it and fastened to a peg on the top of the incline as shown. Determine the pull on the string assuming that the rope is held ...
August 7, 2014

math
Hello, i would like to know what is the complex conjugate of : (a*c*d)×( (-e*d+i)/(1-e*c*d^2) ) Thanks for your help.
November 3, 2013

math
Hello, i would like to know what is the complex number of : (a*c*d)×(-e*d+i)/(1-e*c*d^2) ACDE are strictly positive real constants. I is an imaginary number. Thanks you a lot for you help.
November 2, 2013

math
Thanks a lot for your help . I'll visit it
November 2, 2013

math
Hello, I'd like to know how in developing, factoring or simplifying, we can move from: goo.gl/zZdzSs ACDE are strictly positive real constants. I is an imaginary number.
November 2, 2013

Math
I made a picture. goo.gl/zZdzSs
November 2, 2013

Math
Hello, I'd like to know how in developing, factoring or simplifying, we can move from: A + ( (1 / ( (1 / ICD) + IED) ) to: ACD *( ( - ED + I ) / (1 - ECD^2 ) ) ACDE are strictly positive real constants. I is an imaginary number.
November 2, 2013

math
Hello, I'd like to know how in developing, factoring or simplifying, we can move from: A + ( (1 / ( (1 / ICD) + IED) ) to: ACD *( ( - ED + I ) / (1 - ECD^2 ) ) ACDE are strictly positive real constants. I is an imaginary number. Thanks a lot for your help.
November 2, 2013

calculus
find 3 positive real numbers whose sum is 500 and whose product is as large as possible.
October 28, 2013

chemistry
there should be an E(V) too. let suppose your E(V)=.128.. your calculation should somewhat look like this if I'm not wrong, Ecell=E^o cell - (RT/nF)lnQ .125=0-(.0592/2)lnQ e^(-.128/.0296)=[I]/.1M [I]=.001324 [Pb]= [I]x(1/2)=.000662 ksp=[Pb][I^2]=1.16E-09
October 24, 2013

physics
Suppose a rope of mass m hangs between two trees. The ends of the rope are at the same height and they make an angle θ with the trees. (a) What is the tension at the ends of the rope where it is connected to the trees? Express your answer in terms of m, g, and θ (...
October 8, 2013

programming
b. Write a well-commented C++ program that reads data from the input file employee.txt. Each input line consists of last name, first name, base salary, total sales, and number of years of service. Store the output in the file employees_payCheck.txt. Format your output to have ...
June 1, 2013

chemistry
If lithium is a BCC crystal. planar density is atoms per area the 001 plane look like this o--o | | o--o the sides are equal to lattice constant a and the atoms in this area = 4(1/4) = 1
April 26, 2013

chemistry
Lithium is a BCC Crystal a = 3.5092 * 10^-8 Planar Density (001) (top plane) = 1/a^2 = 8.12 * 10^14
April 26, 2013

Alegbra (logs)
Please help, I need help on these two problems. Solve the equation. log3(x − 16) = log3(9x) e^1 + ln(7) It appears on the homework that the ln(7) is written like this ^ln(7) but I am still stuck on it. Thanks!
April 22, 2013

Physics
What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
November 29, 2012

Physics
A 100 m long wire with a cross-sectional area of 4 mm2 has a resistance of 6 ohms. What is the resistivity of the material of the wire in Ùm?
November 29, 2012

maths
i am a mutiple of 5 ,but not a mulitple of 10.my units and hunderde are the same.the sum of my three digits is 11,what am i
October 18, 2012

physics
A shuffleboard disk is accelerated to a speed of 5.6 m/s and released. If the coefficient of kinetic friction between the disk and the concrete court is 0.29, how far does the disk go before it comes to a stop? The courts are 15.7 m long.
September 26, 2012

physics
A box, open at the top, in form of a cube of edge length 40 cm, is constructed from a metal plate. Find the coordinates of the center of mass of the box with respect to x, y, and z coordinate system.
October 10, 2011

physics
On the surface of the Moon, a ball is thrown horizontally, with a speed of 15 m/s, from the top of a 6 m tall hill. How far from the point on the ground directly below the launch point does the ball strike the ground? (On the Moon, the acceleration due to gravity is only 1.67 ...
September 20, 2011

geometry help
a trapezoid has base lengths of 4 and 19 feet, with an area of 115 square feet. what is the height of the trapezoid?
June 1, 2011

math
your class has 8 women and 19 men. write the number of women to men as a ratio and as a quoyient. whatpercent of the class are women? show your work.
February 9, 2011

math
ratio of 8/9,quotient of 8/19,percent of 8/19.
February 9, 2011

Chemistry
The melting temperature of the fluorides of selected alkali metals and alkaline earths are listed below (see Table). If one considers the trend of the listed melting temperatures in terms of both the ionic character of the bonds and the ionic potentials of the compounds, which...
January 22, 2011

Math
okay thanks bobpursley
January 12, 2011

Math
The rounded numbers all range from the hundred thousands to the millions. Which place-value should be used as intervals for a scale for the graph?
January 12, 2011

determining speed
car leaves a 20 ft. skid mark how fast was the car traviling
January 12, 2011

Algebra 2
M Varies jointly with A and T and inversley with H. Write and equation that represents the relationship.
December 14, 2010

psychology
D!! Thank you
October 30, 2010

psychology
based on the websit you provided I will assume it is B.
October 30, 2010

psychology
Jeff says, "It seems like the more money people make, the more debt they assume," but a/an __________ study might make the case that a rise in income does not by itself cause an increase in debt. criterion validity case experimental correlational I chose C.
October 30, 2010

psychology
Would it be D?
October 30, 2010

psychology
One advantage of using tests in research, rather than laboratory observation, is the usefulness of: the presence of the researchers, which increases the reliability of the results. describing behavior, rather than explaining it. tests in clarifying the differences in the ...
October 30, 2010

psychology
I chose D. Am I correct?
October 30, 2010

psychology
To gain acceptance, a hypothesis must be: suggested by a credible authority. kept secret until the research is completed. imaginative and appealing. backed by empirical evidence
October 30, 2010

psychology
Please help!!
October 30, 2010

psychology
It is the proper role of a psychological research scientist to: question data. make safe predictions. keep research methods accessible only to those involved in the research. avoid making predictions.
October 30, 2010

psychology
Im confused, please help!
October 28, 2010

psychology
Psychologists are interested in people's behavior and their mental processes. Psychologists believe that: behavior is impacted by environment, but not by a person's physical state. behavior is affected by a person's mental and physical state, but rarely by his or ...
October 28, 2010

social studies
I think its D, but not sure, please help!
October 28, 2010

social studies
To use dollar-cost averaging, an investor must invest: in securities with high average yields. in dollars rather than currencies from outside the U.S. or Canada. a variable amount of money at regular intervals. the same amount of money in stocks regularly.
October 28, 2010

Chem
u need to get the M as M= 15*M(C) + 22 * M(H) + 2 * M(O) + 1 M(Cl) + 1 M(N) then u use the formula n=m/M and u replace youll have m= n*M
October 9, 2010

physics
hows that it doesnt work whats the full equation?
October 9, 2010

physics
A motorcycle and 66.0 kg rider accelerate at 2.0 m/s2 up a ramp inclined 5.0° above the horizontal. What are the magnitude of (a) the net force on the rider and (b) the force on the rider from the motorcycle?
October 9, 2010

algrebra 2
how to find the xintercept and y intercept 5y=15x-90
September 19, 2010

algebrra
perimeter: 56cm 7cm 24cm the lenght of the third side of the triangle is? idk
August 31, 2010

algebraa
thats what i gett
August 31, 2010

algebraa
mm 13cm??
August 31, 2010

algebraa
perimeter= 30 5cm 12cm the lenght of the third side of the triangle is?
August 31, 2010

algebraa
find the length of the third side of the triangle perimeter=12 3cm 4cm
August 31, 2010

English-Literature
house
July 27, 2010

chemistry
Using the Le Chatelier's principle, predict the direction of the net reaction in each of the following equilibrium systems, as a result of increasing the pressure at constant temperature. a)N2(g) + O2(g) ==> 2NO(g) <== b)PCl5 ==> PCl3(g) + Cl2(g) <== c)CO(g) + ...
June 14, 2010

At what temperature do hydrogen molecules have the
At what temperature do hydrogen molecules have the same rms speed as nitrogen molecules at 90 degrees Celsius?
March 31, 2010

physics
a)2.910 b)11.089
January 6, 2010

math
my P.E. teacher asked the 100 seventh graders in my school if they could swim. Half of the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?
October 7, 2009

A level Mathematics
Show that the tangents to the curve X=ln((y^2)-6y+11) ,at the points where X=ln6,meet at the point ((ln6)-(4/3),3)
September 5, 2009

maths
Show that the tangents to the curve X=ln((y^2)-6y+11) ,at the points where X=ln6,meet at the point ((ln6)-(4/3),3)
September 5, 2009

gen 300
i cant think of one
August 24, 2009

gen 300
i need this assignment
August 24, 2009

gen 300
Identify a problem in your day-to-day life you would like to solve (e.g., time management). Using the information from your Week Three readings as a guide, prepare a 700 to 1,050-word paper in which you develop a research strategy to find a solution for your selected problem. ...
August 24, 2009

Algebra Math 116
How can you tell if a value is a solution to an inequality.
August 20, 2009

psychology
reflect on a challenging experience that you have encountered in either a professional or personal environment that involved significant “thinking through” or reasoning.
August 8, 2009

psycholgy
all my experiences have been horrible, sister drowning in the pool and dying, hrs, uncle was murdered on thanksgiving, which one sounds good to talk about, why would i even want to talk about it anyways..forget it let someone else help me instead of trying to analyze me my ...
August 8, 2009

psycholgy
i only have to pass this class so i can switch majors, i hate psychology and i did not realize what i wass getting into i was just excited to go back to school..im changing to criminal justice, psychology is not for me
August 8, 2009

psycholgy
wow that sounds like it was a hard decision, how do u quit doing something you did your entire life
August 8, 2009

psycholgy
give an experience
August 8, 2009

psycholgy
Prepare a 1,050 to 1,400-word paper in which you reflect on a challenging experience that you have encountered in either a professional or personal environment that involved significant “thinking through” or reasoning. Be sure to address the following items: a. ...
August 8, 2009

language
My school gives out these pop quizzes and this bonus quiz asks this question: what does polyvinylrododospagaspamomo mean? please help! sincerely, Karl
February 24, 2009

language
thanks for trying
February 24, 2009

language
My school gives out these pop quizzes and this bonus quiz asks this question: what does polyvinylrododospagaspamomo mean? please help! sincerely, Karl
February 24, 2009

fractions
I cannot figure out how to turn fraction into decimals.Sample 8 over 25.Also turning decimals into fractions 0.65
August 26, 2008

Chemistry
Quick question, since FePO4 is insoluble, will that mean a precipitate will form? During the experiment I don't remember seeing a precipitate. Is that my error, or is the precipitate hard to see? Sure. Adding Na3PO4 will make a big difference. FePO4 is almost completey ...
December 17, 2006

Chemistry
In a lab, we added NH3(aq) to CuSO4(aq), and the solution turned dark blue with a precipitate. The problem is that the products ( Cu(NH3)4 and SO4) should be soluble, no? The question is then, what is the percipitate? The ppt is Cu(OH)2. The dark blue solution is Cu(NH3)42+ ...
December 17, 2006

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