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November 28, 2014

Posts by KEVIN


Total # Posts: 956

College chemistry
specific heat of h2o is 4.184
April 26, 2010

College chemistry
it makes sense too because if you think about it you are making a 5.0 L solution and 191.20 mL isnt even 1/5 of a liter
April 26, 2010

College chemistry
yep
April 26, 2010

College chemistry
use the equation drbob222 gave you before. its the right one. you may have to convert the 5 L to mL first though for it to work or understand that ur answer is in L and convert it. one or the other
April 26, 2010

Chemistry
if im missing any info plz tell me ill get back to it asap. it was put in a styrofoam cupand the temperature of the solution was measured directly if that helps at all. i just need to know i guess whether or not im treating the data as a coffee cup calorimeter or doing ...
April 26, 2010

Chemistry
g+ 2HCl-->MgCl2+H2 The mass of the HCl is 24.852 g mass of the Mg is .990 g and the mass of the calorimeter is 3.711 g. the change in temperature of the solution was +19 degrees celcius. itd be great if i could just get a basic equation to use or something i can do the ...
April 26, 2010

geometry
the first thing that you need to do is solve for x. The sum of the interior angles inside a pentagon is equal to 540 degrees. you come up with the equation 2x+6x+4x-6+2x-16+6x+2=540. Then you want to simplify it down to 20x-20=540. there are multiple ways you can finish this ...
April 26, 2010

Chemistry
opps i suppose i forgot to give the temperature change and it was a +19 degrees celcius
April 26, 2010

Chemistry
Mg+ 2HCl-->MgCl2+H2 The mass of the HCl is 24.852 g mass of the Mg is .990 g and the mass of the calorimeter is 3.711 g. How do I calculate the heat of the reaction of all this please?
April 26, 2010

trig
you have to use the law of sines which a/sinA=b/sin B=c/ sin C where the top letter is the opposite side of the angle and the lower letter is the angle itself. first you would go about solving this for angle B by putting 12/sin 76=4/ sin B. doing simple algebra the equation ...
April 26, 2010

algebra 2
is that exactly how it is showed or is there a log base? normally that means theres a log base 10 and if that is the case the answer is 10^3.2. in a more general sense x=b^y and putting it in terms of y the equation is y=logbx were b is subscripted i just dont know how to do ...
April 26, 2010

Math
What's the difference between sample space and event in a lottery game (where 50 numbers are drawn and you have to guess/pick six numbers?). Can you give examples of both?
April 19, 2010

economics
How is the demand curve for an item that is very responsive to price changes likely to be different from that of an item whose demand is not very responsive?
April 19, 2010

EGYPT
bobpursley what are some of the conflicts the website doesn't work
April 15, 2010

EGYPT
I NEED TO KNOW ABOUT EGYPT THESE ARE THE QUESTIONS THAT I HAVE TO ANSWER: -IS THERE RURAL AREAS -IS THERE ANY CONFLICT(RELIGIOUS,SLAVERY ETC.) -IS THERE ANY POLUTION THAT'S ALL THANK U
April 15, 2010

trig
prove the trig identity cos(4x) = 2-sec^2(2x)/sec^2(2x)
April 14, 2010

6th grade
Kara has a diamond ring. Her ring has a volume of 6cm(to the third power) and a mass of 2g. What is the density of her ring? INCLUDE UNITS!
April 6, 2010

Pre Calculus
The electricity in your house is alternating current because the current varies sinusoidally with time. The frequency of sinusoid is 60 cycles per second. Suppose at Time = 0 seconds the current is at its max of 5 amperes. Write an equation expressing current in terms of time
March 30, 2010

math
The mean score on a Math exam was 50% and the standard deviation was 10%. Assume the results were normally distributed. (a) What percent of students earned a score between 50% and 70%? (b) If 60 students took the exam, how many got a score between 50% and 70%?
March 28, 2010

math
Explain how to evaluate x-8 when x=10?
March 25, 2010

math
five names for -73
March 23, 2010

Math
Is anyone familiar with base ten? I need to show my work on how I recieved my answer. Write the numeral in base ten. 200six =532
March 21, 2010

algebra
A wheel makes 4 17/20 revolutions per minute. If it rotates for 48 minutes,how many revolutions does it make?
March 20, 2010

social
Ok, I think both of these are syndicated but im so confused! The type of programming aired by a station with which they "affiliate" is called A) syndicated programming B) local origination C) network programming D) non of the above This type of programming, produced ...
March 14, 2010

social
Ok, I think both of these are syndicated but im so confused! The type of programming aired by a station with which they "affiliate" is called A) syndicated programming B) local origination C) network programming D) non of the above This type of programming, produced ...
March 14, 2010

social
The "jack fm" format is an attempt to stimulate the random programming of an ipod on shuffle. True or False I'm really not sure what it is.
March 14, 2010

social
i agree with the first one, but why would the second one be false? when somethings head to head wouldnt it be 2 programs battling and 1 trying to be successful?
March 14, 2010

social
Never mind I'm not sure thats why i asked, how about the other question i think thats false do you?
March 14, 2010

social
unique as in do they have a competitor
March 14, 2010

social
Are both these false? A unique format is one for which there is no similar competition in the market. A) True B) False I also think this one is false but again not sure A "head to head" format refers to a format that is trying to successfully program against a ...
March 14, 2010

social
Are both of these false A unique format is one for which there is no similar competition in the market. A) True B) False I also think this one is false but again not sure A "head to head" format refers to a format that is trying to successfully program against a ...
March 14, 2010

social
Can you help me please, i think it is false but im not sure A unique format is one for which there is no similar competition in the market. A) True B) False I also think this one is false but again not sure A "head to head" format refers to a format that is trying to...
March 14, 2010

Social Studies
Thank you so is the first one true as well?
March 14, 2010

Social Studies
Is this true or false: The radio business and the record business are interdependent; they have strong ties between them. i think its true and also is this true or false Radio programming can derive from locally produced, syndicated or network programming. A) True B) False
March 14, 2010

math
A TV reporter said that twice as many woodlands were lost this year to fire than in the preceding year. He claimed this was an increase of 200%. Was he correct?
March 11, 2010

Determinants
Why are finding determinants important? Aside from Cramer's rule when are determinants used?
March 11, 2010

Math
Write 0.36 as a fraction.
March 10, 2010

math
a girl flipped a coin 4 times, what is the probability that she gets 3 heads and 1 tails? Using a tree diagram
March 7, 2010

Math
Hey buddy, i'm pretty sure this is against the rules. just so you know, its unlikely that you'll get much help from this site. i think you should use a different site if you want help...the census, just a thought. best of luck to you, i can already tell you are going ...
March 6, 2010

Finance
What is the current yield of a annual coupon bond with a 6% coupon, four years until maturity, and a price of $750?
March 5, 2010

Math
A standard train ticket in a certain city costs $2.50 per ride. People who use the train also have the option of purchasing a frequent-rider pass for $18.00 each month. With the pass, a ticket costs only$1.75 per ride. How many train rides in a month make the frequent-rider ...
March 2, 2010

Math
Solve and graph the solution set on a number line. |5x + 7| - 2 < 4 <------------------------> -5 -4 -3 -2 -1 0 1 2 3 4
March 2, 2010

Algebra 2
Solve each equation: (x^2-3)(x^2+3x-4)=0 (x+2/3)(x^2+5x+1)=0 x^3-2x^2+x=0 x^3+3x^2-5x-4=0
March 1, 2010

Global History
How did military motivies contribute to imperialism? and why did missionaries support imperialism?
February 16, 2010

Global History
How was Nationalism a cause of imperialism? and what was gained economically through imperialism?
February 16, 2010

Math
How do I make 2/30 into a percent? I don't need answer only need to know how to solve.
February 11, 2010

Math
I am suppose to write 2/30 as a percent. My answer choices are a .o6%, b. .005% c. .6% d. .05% I thought I would divide 2 into 30 which would be .06 and then moving 2 spaces to the right equaling 6%. How do I solve this problem.
February 11, 2010

Math
How would you work this... You are facing north. You turn 270 degrees counterclockwise. Which direction are you facing? Is it West? You start out at 90 and go from there? I don't know...
February 10, 2010

math
Suppose the cost C(q) (in dollars) of producing a quantity q of a product equals C(q) = 500 + 2q +1/5q^2 The marginal cost M(q) equals the instantaneous rate of change of the total cost. Find the marginal cost when a quantity of 10 items are being produced.
February 8, 2010

math
Solve the inequality x^2 + 7x + 12 < 0.
February 8, 2010

math
Find the domain of g(t) = sqrt (3t + 15.)
February 8, 2010

math
If f(x) = 3x + 9 and g(x) = −x2, then find f(g(1)).
February 8, 2010

Physics
A 90 kg halfback runs north and is tackled by a 120 kg opponent running south at 4 m/s. The collision is perfectly inelastic. Just after the tackle, both players move at a velocity of 2 m/s north. Calculate the velocity of the 90 kg player just before the tackle. a.) 3 m/s ...
February 6, 2010

physics
The coefficient of static friction between the tires of a car and a horizontal road is 0.515. As the car brakes, what is the magnitude of the maximum acceleration of the car? Assume the net force on the car is the maximum static friction force.
February 5, 2010

Chemistry
Write the mechanism for (E)-2-5-dimethyl-hex-3-ene and bromine? Assign the R, S configuration for each of the products and determine the stereochemical relationship of each set of products. I think the products will be trans but I am not quite sure how the mechanism work. Any ...
February 2, 2010

math
Why exactally does the absolute value of -3+4i = 5. I know (-3) squared plus (4i) squared = 5? Could you include a graphic approach as well? Thank you.
February 2, 2010

Chemistry
Using the balanced reaction, enter the formula, charge(if any), and state of the species (exclude H2O) in solution if Ba(NO3)2(aq) reactant is present in stoichiometric excess. Separate your answers by comma. NaCl(aq) + Ba(NO3)2(aq) → NR
January 29, 2010

10th grade
Microbiology affects a person on a daily basis because it starts from the things that we do to the things that we don't. Such as when we take Omega 3 Fish Oil Supplements, the oils, and the vitamins from within, helps us daily, without us even knowing about it. Or when we ...
January 27, 2010

Organic chemistry
Is m-nitroaniline soluble in water, 1.0M NaOH, 1.0M HCl?
January 24, 2010

Organic chemistry
is benzoic acid soluble in water, 1.0M NaOH, 1.0M HCl?
January 24, 2010

Trig
Thanks for letting me know about wave seperation. Could you tell me more please. What exactally is meant by wave seperation. Does it mean above and below the midline or does it mean seperation between wave cycles? What does it mean?
January 22, 2010

Trig
in the equation y=acos b(x-h)+k, what exactally does b represent. How is it helpful?
January 22, 2010

Trig
In the equation y=4cos 6x, what does 6 represent? In general for the equation y-acosbx, what does b represent?
January 22, 2010

chemistry
Predict the Products for the following reactions and write the chemical equation. Combustion: Liquid Octane, C8H18 burn in oxygen gas. how would you set this up and predict the product? Thnx in advance whoever figures it out :)
January 21, 2010

Chemistry
"A sample of a nonpolar molecules capable of only dispersion forces can have a higher boiling point the a sample of a polar molecules capable of hydrogen bonding. This statement can only be true if the formula weight of nonpolar molecule(the answers are =,<, or >)...
January 18, 2010

Bible
I believe the 1st question is number 2. & the 2nd question is number 3. Can anyone confirm this. Thanks.
January 11, 2010

Bible
I need help with these two questions please. I cannot figure out what goes with what. Thanks. The orderly design and purpose of nature which verifies a divine intelligence is a(n) ? argument. Choises: 1. teleological 2. cosmological 3. anthropological The analogy between man ...
January 11, 2010

Bible
I don't know which one of these fits the blank. Can someone please help? The law of cause-and-effect which verifies a divine power is a(n) ? argument. Choises: 1. teleological 2. cosmological 3. anthropological
January 11, 2010

Algebra
A rectangle is 20 inches tall it's area is 260 inches what is the width
January 10, 2010

Business
What is the proper format for a research taxonomy? I have to write about the Strategic Management process.
January 10, 2010

History
I still think its #1? is that correct?
January 6, 2010

History
One of the significant changes in atmosphere in Jefferson's administration was: 1. The number of common people involved in government. 2. The closing of the bank of the united states. 3. the widespread dismissal of federalist officeholders. 4. The reinstatement of the ...
January 6, 2010

Econonmics
Assume that the gross national debt initially is equal to $3 trillion and the federal government then runs a deficit of $300 billion
December 30, 2009

Organic Chemistry
The one we used was sodium hypochlorite (NaOCl)
December 21, 2009

Organic Chemistry
What other oxidizing reagents could have been used to convert the 9-fluorenol to 9-fluorenone?
December 21, 2009

math
Ok really I don't know all of the steps but if you look at the da/dt of a) and put it over the dh/dt of b) then you get your answer. I don't know. I'm doing it right now. God Bless!
December 19, 2009

Math
When you put together unequal groups you can only add. Is this correct? Explain
December 14, 2009

Science
I believe a starfish has radial symmetry but how would I divide it using a ruler since there are 5 arms?
December 9, 2009

physics
38 Joules dude
November 30, 2009

9th grade
Mr. Mist’s ramp broke so he tried to lift the his 150 Newton box of ungraded papers with a pulley system. Mr. Mist had to pull the rope in his system 3 meters. The papers were lifted into his car by the pulley system which lifted the box 1.5 meters, while Mr. Mist only ...
November 14, 2009

Trig
How do you do this problem? 1+i(square root of 3)
November 12, 2009

phisics
To keep the cylinder in equilibrium both side must be equal. (m1)*(v^2/r)=(m2)*g Left side=Right side (v^2/r) = (m2)*g / m1 isolate “v” on the left… v^2 = (m12)*g*r/m1 v = sqrt((m2)*g*r /(m1)) plug in the values and you are done… v = sqrt(2.5*9.81*.2)/(1.5...
November 5, 2009

physics
A ball of mass 0.35 kg is fired with velocity 157 m/s into the barrel of a spring gun of mass 1.8 kg initially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring. No energy is lost to friction. What fraction of ...
November 1, 2009

physics
thanks
October 31, 2009

physics
A 80- kg ice hockey player standing on a frictionless sheet of ice throws a 6.2- kg bowling ball horizontally with a speed of 2.1 m/s. With what speed does the hockey player recoil?
October 31, 2009

us history
In 1754,which country claimed the least amount of land in North America
October 26, 2009

FINANCE
Tim recently invested $3,500 in a project that is promising to return 10.75 percent per year. The cash flows are expected to be as follows: End of Cash Year Flow 1 $750 2 800 3 ??? 4 950 Note that the 3rd year cash flow is unknown. Assuming the present value of this cash flow ...
October 22, 2009

Statistics
In hypothesis testing, if a claim statement is asking to test a percentage, your graph is a T or Z line?
October 21, 2009

Statistics
In hypothesis testing, if the population standard deviation is KNOWN, your graph should be labeled a T or Z line? In hypothesis testing, if the population standard deviation is NOT KNOWN, your graph should be labeled a T or Z line?
October 21, 2009

math
im learnin about y=mx+b 1.describe the line you think each equation represent Y=x, y=5, x=-3 2. The equation of a line is y=mx+2. determione the value of m when the line passes through each pint D(12.5) s(1.-3) e(-2.6) a(-5.1)
October 17, 2009

Chemistry
A student finds a medallion which could be made of pure platinium or silver. IN order to find out what the medallion is made of the student takes the medallion to a chemistry lab. The student measures the density of the medallion as follows. The medallion is placed on a ...
October 12, 2009

chemistry
A rectangular metal bar has a volume of 50.0 inches cubed.The Metal BaR weighs 1.42kg. Calculate the density of the metal in grams per cubic centimeter.
October 12, 2009

math
Brian O'Reilly earns twice as much each week as a tutor than he does pumping gas. His total weekly wages are $150 more than that of his younger sister. She earns one quarter as much as Brian does as a tutor. How much does Brian earn as a tutor?
October 11, 2009

Biology
What's the difference between LB "-" and LB "+"?
October 9, 2009

Chemistry
If 7.83 g FeCl3(s) is dissolved in enough water to make 2.50 L of solution, what is the concentration of Fe3+ in the solution?
October 9, 2009

physics
A highway curve with a radius of 430 m is banked properly for a car traveling 115 km/h. If a 1550- kg Porshe 928S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid?
October 7, 2009

6th grade math
how would you say .3481 in words?
September 29, 2009

math
write the six-digit number that has the digit in the thousand's place, with the remaining digits being
September 20, 2009

11th grade
1.71 cause of Sig Figs
September 9, 2009

Finance
Jenning inc. paid out total dividends equal to $ 11,124,200 in 2008. If Jennings reported Retained earnings of $320,868,600 for 2007 and retained earnings of $350,290,100 for 2008, what was Jennings reported net income in 2008?
August 27, 2009

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