Thursday
September 18, 2014

Posts by jhon


Total # Posts: 61

Chemistry
How much energy in kilojoules is released when 25.0 g of ethanol (C2H5OH) vapor at 93.0 C is cooled to -10 C? Ethanol has mp = -114.1 oC, bp = 78.3 oC, ΔHvap = 38.56 kJ/mol, and ΔHfus = 4.93 kJ/mol. The molar heat capacity is 112.3 J/(K.mol) for the liquid and 65.6 J...
September 7, 2014

Young Harris College
How much energy is needed to heat 8.50 g of ice from -30.0 C to 70.0 C? The heat of fusion of water is 6.01 kJ/mol, and the molar heat capacity is 36.6 J/(mol.K) for ice and 75.3 J/(mol.K) for liquid water. I got 19.24kJ but it isn't correct!!
September 7, 2014

Statistics - Please help
stop cheating
April 3, 2014

Math
1000010101
April 1, 2014

Probability
1??? 2 2/72 3a 12/72 3b 1/4 3c 0 3d 42/72 4a 3 4b 61/9 5 3/2 6 173/47
March 7, 2014

logic
a team of Andres Bruno carlos Daniel and Esteban participated in a tennis doubles tournament so two of one team play against other two It is known that Andres participated in a game Bruno in 2 carlos in 2 Daniel in 3 and Esteban in 4 then the amount of matches of the team were...
February 17, 2014

logic
CLaudia has 4 task to do go to the market, study, clean , sport it is known - go to the market if study - study if she does not clean - if she does not clean then she goes to the market a 15% b 12% c 10% d 24%
February 17, 2014

logic
a survey of three marks of soda has -of 100 people 83 drinks at least 1 of 3 marks -54 just drink 1 -19 drinks 2 of 3 between the people the % that drink the 3 are a 15% b 12% c 10% d 24%
February 17, 2014

logic
100 days after a sunday will be a day a Sunday b Tuesday c thursday d monday
February 17, 2014

logic
In a soccer tournament between four teams A,B,C,D wich was free for all the scores were A 4 points B 4 points C 3 points D 1 point In this tournament the winner gets 2 points, the draw 1 point the looser 0. It is known that each team has a goal so. 1 The result bteween A and B...
February 17, 2014

logic
in a bike competition with 21 laps was observed that 13% quit before 5 laps, 17% quit later than 5 laps but less than 15, and the others 210 finished the competition the number of bikers that quit before the 5 lap were: a) 27 b) 39 c) 43 d) 56
January 10, 2014

logic
Camilo, Diego, Esteban transport on their bikes apples, the way was splitted in two parts to handle the weight. In the first step for each 6 apples that carries Camilo diego carries 5 Esteban 4, in the second step for each 2 apples tath carries Camilo, Diego carries the same ...
January 10, 2014

logic
the rectangle represented the AB side is 4cm the side BC is 6 cm i want to build a triangle taking the AB segment and the third vertice inside the triangle so his area becomes higher than 8 cm*cm. the area in cm*cm of the region of the rectangle in which can be chosen the ...
January 10, 2014

logic
the rectangle represented the AB side is 4cm the side BC is 6 cm i want to build a triangle taking the AB segment and the third vertice inside the triangle so his area becomes higher than 8 cm*cm. the area in cm*cm of the region of the rectangle in which can be chosen the ...
January 10, 2014

classical mechanics
A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 20.0 cm. The two vertical pipes are open at the top, and the difference in water level between them is 2.0 m. Find ...
January 3, 2014

Logic
Claudia has four home works to do, go to the market, study for the exam, clean the room, and practice sports, she knows that: -she goes to the market if she studies for the exam. -she studies for his exam if she does not clean his room -if she does not practice his sport then ...
January 3, 2014

math
i want to add 34+85% i tryed it and i got 62.9
November 22, 2013

math
its in percent (85%) i dont think it should be in decimal when i tryed it i got the answer as 28.9 tonnes
November 22, 2013

math
Many people are trying to reduce their carbon footprint. Amrita’s carbon footprint this year was 85% of last year’s footprint. If her carbon footprint this year is 34 tonnes,what was her carbon footprint last year? PLZ NEED HELP
November 22, 2013

math
Please show all of your work in the space below. Please present and organized and complete solution. A garden will be made up of a parallelogram, a rectangle and a triangle. The garden must have an area of 500m square. Draw two possible gardens. Determine the dimensions of ...
November 22, 2013

Physic
HW3___1B ?
May 7, 2013

chemistry
a) option d
April 10, 2013

Exam: 986109RR - CHOOSING YOUR BUSINESS
1. a 2.c 3.a
March 7, 2013

math
cotx+tan2x=cotxsec2x prove
February 14, 2013

physics
a pitching machine throws a baseball at a batter with an initial velocity of 22.0 m/s at an angle of 30 degrees to the horizontal. the ball is 1.60 m above the ground when it is pitched. a) if the batter hots the ball at the same height as it was launched how long is the ball ...
October 4, 2012

physics
A motorboat travels due north at a steady speed of 3.0 m/s through calm water in which there is no current. The boat then enters an area of water in which a steady current flows at 2.0 m/s in a southwest direction, as shown in the next picture. Both the engine power and the ...
August 16, 2012

calculus(related rates)
Water is leaking out of an inverted conical tank at a rate of 12200 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 15 meters and the diameter at the top is 6.5 meters. If the water level is rising ...
May 5, 2012

math
a drawing of a deck has a scale of 1 inch to 5 feet. the actual deck is 18 feet long.how long is the deck in the scale drawing?
May 3, 2012

calculus
the dimensions of a closed rectangular box are measured as 30 in, 40 in.. and 60 in.. with a maximum error of 0.2 in. in each measurement. use differentials to estimate the maximum error in calculating the volume of the box
April 1, 2012

calculus
find the approximate change in z when the point (x,y) changes from (1,1)to (1.01, 0.90) f(x,y) = xe^(-y) + ye^(-x)
April 1, 2012

Chemistry
If a 2.6 g of weak diprotic acid were dissolved in 100 mL of water and a 10 mL aliquot of this solution required 21.6 mL of 0.1 M NaOH to reach the first endpoint, what are the equivalent and formula weights of H2A? I think I first need to find the moles of NaOH. Then, by ...
February 16, 2012

English
Is it self plagerism if I take the same argument or main idea from a paper that I wrote last semester and use that same principle/argument/main idea/thesis in another paper for the next semester if it's is completely rewritten with different words and stuff but is trying ...
December 27, 2011

Trigonometry
this can't be sovled there are two variables and one equation
December 27, 2011

Trigonometry
this can't be solved there are two variables.
December 27, 2011

garyson
A person rides up a lift to a mountaintop, but the persons ears fail to pop –that is, the pressure of the inner ear does not equalize with the outside atmosphere. The radius of each ear drum is 0.40×10ˆ-2m. The pressure of the atmosphere drops from 1.010×...
December 24, 2011

Computer Science (MATLAB)
Given an arbitrary one dimensional vector v imputed by the user for example v='Helllllloooooo' or v='Helo' I was able to append empty characters onto any one dimensional vector that the user can enter so that way the total length of the vector is a multiple of ...
November 14, 2011

Computer Science (MATLAB)
I had a test in my computer science course in which I was asked if any while loop can be replaced with a for loop. I put true. I guess the answer was false. My professor said that if you had a while loop in which you asked the user to input a certain value that had to be ...
November 1, 2011

Computer Science (MATLAB)
I had a test in my computer science course in which I was asked if any while loop can be replaced with a for loop. I put true. I guess the answer was false. My professor said that if you had a while loop in which you asked the user to input a certain value that had to be ...
November 1, 2011

Computer Science (MATLAB)
Given a vector of values of zeros and ones such as [1 0 1 0 0 0 1 0] I'm asked to, given a probability provided by the user, use that probability to change the values in the vector using that probability. For example given the vector [0 1 0 0 0 1 0 0 0 1] and probability ....
October 18, 2011

English
Hi, I'm writing a paper for English and my professor crossed off the authors name in one of quotes for the citation of my rough draft as if it was suppose to be there. Something like xxxxxxxxxxxxxxxxxxxxxx (john 59) and she crossed off john as if I wasn't suppose to ...
October 10, 2011

science
the last question i do not get can one of y´all help me out lisa is working on a science project her task is to answer the question ¨does rogooti(which is a commerical hair product) affect the speed of hair growth control group: independent variable: dependent variable:
September 1, 2011

science
can you tell me a website on elements
January 28, 2011

science
Can you give me awebsite about phase change?
January 17, 2011

science
thankyou
January 15, 2011

science
Can you give me a website about attoms
January 15, 2011

science
Where can I find some information about nourvis system and endocrine system?
December 27, 2010

government
how can I become active in politics that would help promote causes that you believe in.
December 25, 2010

Normal distribution
The breaking strength of cable is known to be normally distributtes with a mean of 4000 kg and a standard deviation of 25 kg.The manufacturer prefers that at least 95% of his product meet a strength requirement og 4050 kg.is that requirement being met?if not. by changing the ...
December 22, 2010

social studies
Where can I find some information about native americans
December 12, 2010

9 th grade geomitry
how do you do 19= n - 9 ??????
September 9, 2010

math
x=400*1/2y x+y=29600-2*y x--> Concord population y--> Euclid population solve for x
September 7, 2010

Chemical Engineering
How much acetone liquid (in mls) is required to produce a vapor concentration of 200 ppm (parts per million) by volume in a room of dimensions 3 x 4 x 10 meters? The temperature is 25oC and the pressure is 1 atm. The following physical property data are available for acetone: ...
September 7, 2010

chemistry
Molecular shape of BrF3 by VSEPR theory
August 30, 2010

Science
try yur best
May 3, 2010

Perimeter
Draw a figure with a perimeter of 24, using 11 squares
April 18, 2010

Perimeter
Draw a figure with a perimeter of 24 squares, using 21 squares
April 18, 2010

7th grade english
Is it possible to find a antonym for a noun
December 29, 2009

physical science
How much work is done by the gravitational force on an object of mass 9.40 kg that is initially at rest when it falls down for a time of 1.85 seconds. Ignore air resistance
December 21, 2009

sociology
How does conflict theory and functionalist theory apply to conditions and compensations of the workers in Barbara Ehrenreich's "Nickle and Dimed"?
October 20, 2009

MassCommunication
1.a 2.b 3.c 4.c 5.d
June 5, 2009

Physics
Where could i find the answer?
October 10, 2008

Pages: 1

Search
Members