Friday

November 28, 2014

November 28, 2014

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*