Sunday
November 23, 2014

Posts by randy


Total # Posts: 364

Chemistry
What is the percent by mass of C in methyl acetate (C3H6O2)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of %. Please work it out for me so I totally understand it. Thanks!
December 6, 2009

j
pictures of words
December 3, 2009

math
C=19
November 16, 2009

Chemistry
A selenium atom (Se) would form its most stable ion by the 1. loss of 2 electrons. 2. gain of 1 electron. 3. loss of 1 electron. 4. loss of 7 electrons. 5. gain of 2 electrons. Help please and tell me how you got the answer. Thanks!
October 29, 2009

physics
Object A, which has a mass m and a velocity Vo(i,) ̂ collides with object B, which has a mass 2m and velocity 1/2Vo(j.) ̂ Following the collision ,object B has a velocity of 1/4Vo(i.) ̂(a)Determine the velocity of object A after the collision.(b) Is the ...
October 29, 2009

physics
Object A, which has mass m and a velocity Voi,collides with the Object B,which has mass 2m and a velocity 1/2Voj.Following the collision ,object B has a velocity of 1/4Voi.(a) Determine the velocity of object A after the collision.(b) Is the collision elastic? If not, express ...
October 29, 2009

physics
Sorry, tha a is asking for coefficient and b, is asking for maximum distance?
October 29, 2009

physics
A force is given by Fx=Ax^-3, where A=8.0 N*m^3.(a) For positive values of x,does the potential energy associated with this force increase or decrease with increasing x?(You can determine the answer to this question by imagining what happens to a particle that is placed at ...
October 28, 2009

Physics
can you please explain the v=...part i don't understand what you mean by 24hrsinseconds?
October 26, 2009

Chemistry
Hey guys, been a long time since I have done this. Please show your work. Thanks a lot! How many grams do 3.6 × 10^20 atoms of sodium weigh? Answer in units of g
October 25, 2009

Chemistry
Oh, haha.. Thanks a lot. Very helpful. =]
October 11, 2009

Chemistry
Sorry, but I don't understand. Haven't done this in a while. I divided 137 J by 27.4 and then 80, but I get 0.05 as my answer. is that correct?
October 11, 2009

Chemistry
A 27.4 g sample of metal X requires 131 calories of energy to heat it from 10.0◦C to 90.0◦C. Calculate the specific heat of metal X. Answer in units of J/g ·◦ C. Any help would be greatly appreciated
October 11, 2009

U.S past and present
What is the U. S. past and present?
September 30, 2009

math
how would would u find f(3) and the lim f(x) x->3 of f(x)=(x^2-x-6) / (x-3)
July 17, 2009

CRT205 Quiz
Over time, non-specialists are usually able to assimilate radically new scientific ideas, even though these ideas may seem strange when they are initially introduced. Such was the case with Newtonian physics; when Newton proposed his ideas regarding motion and gravitation in ...
February 27, 2009

Word Problem
C(x) =16x+130 {x| 320 < x <480 525,000/100 5,250=16x+130 16x=5,250-130 16x=5,120 x=5,120/16 x=320 781,000/100 7,810=16x+130 16x=7,810-130 16x=7,680 x=7,680/16 x=480 Then if that is true then this is the solution? I think I got it!
February 18, 2009

Word Problem
Assume that the mathematical model C(x) = 16x + 130 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured while keeping costs between $525,000 and $781,000? Thanks in advance!
February 18, 2009

Engineering
gang rape
February 12, 2009

Engineering
anal beads
February 12, 2009

Engineering
buttplug
February 12, 2009

Engineering
meats
February 12, 2009

critical thinking
A) Quantum mechanics is not inherently more difficult for the non-specialist than previous scientific theories.
January 16, 2009

Economics
Thank You
December 1, 2008

physics
Show that for 1 kg of pure gold the volume of water displaced is 51.8 cm^3 I know that the density of pure gold is 19.32 gm/cm^3 so 1 kg/19.32 gm/cm^3= 0.05175 ? I have come along way with this problem and feel like I am close, but now I need help. How do I get kg and gm to ...
November 21, 2008

Economics
Thank You :)
November 19, 2008

Economics
Could you please show me the workout on this ? Thank You
November 19, 2008

Economics
The question is, what is the for Math formula to show rather the demand of apples is Elastic, Inelastic, or Unitary Elastic Thank You Suppose the price of apples rises from $3.50 a pound to $4.00 and your consumption of apples drops from 30 pounds of apples a month to 20 ...
November 19, 2008

physics
if two carts, one twice as massive as the other, fly apart when a compressed spring that joins them is released. How fast does the heavier cart roll compared to the lighter cart?
November 14, 2008

physics
consider a pair of planets that find the distance between them is decreased by a factoer of 5. Show that the force between them becomes 25 times as strong?
November 14, 2008

science
I mean planets
November 14, 2008

science
a pair of plants has the distance between them decreased by a factor of 5-how do i show that the force between them becomes 25 times as strong?
November 14, 2008

science
if a mack truck and a motorcycle have a head on collision which one is the impact force greater? and which one has the greatest change in its motion? This seems obvious thats why I am asking?
November 14, 2008

science
Somewhere between Earth and the Moon, gravity from these two bodies on a space pod would canel. Is it closer to the Earth or the Moon? why?
November 7, 2008

Honors Biology
What does it mean when you compare and contrast the characteristics of density-dependent and density-independent?
October 18, 2008

6th grade
what is the 8th distributive property
October 8, 2008

3rd grade
The number with the most digits is always greatest. Do you agree? Explain. Explain how you use a hundred chart to subtract 12 from 46.
September 18, 2008

math
Explain how you can use a hundred chart to subtract 12 from 46. A number with the most digits is always greatest. Do you agree? Explain.
September 18, 2008

math
Explain how you can use a number chart to subtract 12 from 46. A number with the most digits is always greatest. Do you agree? explain.
September 18, 2008

math
Explain how you can use a hundred chart to subtract 12 from 46.
September 18, 2008

accounting
Exolain what information would be found in each of the following groupings on a balance sheet, and how that data could indicate the future success or failure of a business.
August 19, 2008

IT
identify at least two data structures that are used to organize a typical file cabinet. why do you feel it is necessary to emulate these types of data structures in a computer program. For what kind of work project would you want to use this type of program?
July 22, 2008

english
what are English words that are difficult to spell?
June 12, 2008

chemistry
Question:A solution of AgNO3 (45 mL/0.45 M) was mixed with solution of NaCl (85 mL/1.35 x 10-2 M) a) Calculate the ion product of the potential precipitate. My answer: mol AgNO3 = M x L = 0.45 M x 0.045 M = 0.02025 mol NaCl = M x L = 0.0135 M x 0.085 L = 0.0011475 (Ag^+) = ...
April 18, 2008

chemistry
How does pH = 8.75 give (H^+) = 1.77 x 10^-9
April 18, 2008

trig
What seven points of x can I put on the x axis over the interval -2pi less than or equal to x less than or equal to 2pi
April 17, 2008

Maths
Thanks a lot
March 19, 2008

Maths
Determine the effective annual yield (annual percentage yield) for $1 invested for 1 year at 8.5% compounded monthly.
March 19, 2008

Chemistry
A 3.67L flask is filled with carbon monoxide at 27 degrees C until the pressure is 1.27atm. Calculate the total pressure after 3.42 moles of carbon dioxide has been added to the flask. (R=0.082L-atm/K mol)
February 28, 2008

math
7/8 * 4/5
January 28, 2008

Math
please help how would i find the unit rate of $112 in 8 Hrs
January 9, 2008

math
if i have 12 markers,but one sixth of them work.wich one is equal to one sixth. A.10/12 B.8/12 c.4/12 d.2/12 Show work
November 7, 2007

geography
which region has areas in the alpine zone?
November 5, 2007

Science
hello why do your fingers and toes get watter logged but not the rest of your body
October 5, 2007

Fin301 Economics
How do I figure out Capital Budgeting in easy to understand terms. Example Cashflow is -$500,000 and the discount rate is 0%, what is the projects net present value?
September 3, 2007

variables
what makes variables difficult to understand?
March 6, 2007

MicroEconomics (please help)
Can someone please help me with the following questions? thanks a lot 1. The cranberry market is perfectly competitive. Reports that consuming cranberries can lead to improved health result in a permanent increase in the demand for cranberries and an immediate upward jump in ...
December 10, 2006

Science
The speed of light is 186,282.397 mi/sec. Convert it to m/sec. Multiply it by 1609.344 meters/mile
December 1, 2006

physics
consider a massless cord attached at both ends to hooks in a ceiling. A 20 kg mass is then suspended from the first cord by a second cors. The angles made by the cord with the ceiling are 40 degrees (left angle) and 25 degrees (right angle). Find the tension in each cord. I ...
November 20, 2006

physics
consider a massless cord attached at both ends to hooks in a ceiling. A 20 kg mass is then suspended from the first cord by a second cors. The angles made by the cord with the ceiling are 40 degrees (left angle) and 25 degrees (right angle). Find the tension in each cord. I ...
November 20, 2006

physics
A force of 30 N pulls a mass left at 30 degrees to the horizontal and one of 100 N pulls right at 120 degrees. If the mass of the mass which is 50 kg, find the acceletation if coeffcient of sliding is .01? What would be the equation of this problem? If you are talking about a ...
November 20, 2006

English
I have to write an essay for Heart of Darkness by Joseph Conrad. The question says in some works of literature a character who appears brifely or doesn't appear at all is a significant presence. Show how such a character functions in the work. You may wish to diiscuss how ...
November 14, 2006

science
From a top a building is 20 m tall, you launch a projectile up at an angle of 30 degrees to the horizontal. You launch at 80 m/s find a) the total time in flight, b) the hightest point reached above the building, and c) distance between the landing point and the base of the ...
November 2, 2006

science
a mass being spun horizontally on a string of radius 1.2 m makes 100 revolutions is 45s. a) find the speed of the mass b) find the centripetal acceleration of the mass. a) to find velocity would i use v = (2 pi r)/ T but I am not sure what the (T) period is. Is it 45s? b) ...
November 2, 2006

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