Friday
November 21, 2014

Posts by SAra


Total # Posts: 3,783

math
what is the radius of convergence for the sum n=1 to infinity of 3(-1)^n(n)(x^n)?
July 21, 2014

science
does density affect weight?
July 19, 2014

Math
I don't know how to explain c. I know the next 3 terms is -19,-27,-36
July 14, 2014

Math
Continue the pattern for three more terms. Describe how to find the successive terms. a)12,9,6,3 b)5,6,8,11 c)3,-1,-6,-12 Please help
July 14, 2014

Science
Make a flowchart to show how the event m might affect a forest ecosystem. A logging company clear-cuts the trees in the forest. My question is; What are the events that might affect a forest ecosystem when clear-cutting the trees in the forest?
July 10, 2014

POL 201 Week 4 quiz help
Question 1.1. The Judiciary Act of 1789 established all of the following except that the Supreme Court would (Points : 1) *A) have one Chief Justice. B)have five associate justices. C)sit in two sessions each year. D)determine how many federal districts there would be. ...
July 5, 2014

POL 201 Week 4 quiz help
Question 1.1. The Judiciary Act of 1789 established all of the following except that the Supreme Court would (Points : 1) have one Chief Justice. have five associate justices. sit in two sessions each year. determine how many federal districts there would be. Question 2.2. ...
July 5, 2014

Science
How do trees decompose?
July 3, 2014

Science
Is a beaver a consumer or a producer and how do you know that?
July 2, 2014

science
and to go along with that. if velocity and mass are constant does that mean the change in magnitude of the momentum is 0?
July 2, 2014

science
Which way is the momentum occuring if a child is riding a merry go round at a constant speed. So for example at each 4 "sides" of the merry go round which direction is momentum . I know the velocity is always tangent to the circle at a specific point. does the ...
July 2, 2014

math
Use the Trapezoidal Rule, the Midpoint Rule, and Simpson's Rule to approximate the given integral with the specified value of n. (Round your answers to six decimal places.) The integral of e^(3sqrt(t)) sin3t dt from 0 to 4. n=8
July 1, 2014

math
An isosceles triangle has a base 9.6 units long. If the congruent side lengths have measures to the first decimal place, what is the shortest possible length of the sides?
July 1, 2014

Eng
What is the interpretation of the journey by Duane big eagle
July 1, 2014

calc
evaluate the integral from 4 to 5. (x^3 -3x^2 -9)/(x^3 -3x^2)
June 30, 2014

science
A car of mass 2900 kg collides with a truck of mass 4800 kg, and just after the collision the car and truck slide along, stuck together. The car's velocity just before the collision was < 34, 0, 0 > m/s, and the truck's velocity just before the collision was <...
June 25, 2014

science
A bullet of mass 0.062 kg traveling horizontally at a speed of 150 m/s embeds itself in a block of mass 90 kg that is sitting at rest on a nearly frictionless surface What is the speed of the block after the bullet embeds itself in the block?
June 25, 2014

sciecne
Two thin hollow plastic spheres, about the size of a ping-pong ball with masses (m1 = m2 = 2e-3 kg) have been rubbed with wool. Sphere 1 has a charge q1 = -6e-9 C and is at location < 40e-2, -20e-2, 0 > m. Sphere 2 has a charge q2 = -6e-9 C and is at location < -50e-2...
June 25, 2014

Business
Was the action of the NPA in line with its and the RBA’s Code of Conduct.
June 24, 2014

math
Thank you .. but the right answer in my book is 115g
June 23, 2014

math
How many gram ofsodiun fluoride should be added to 100000liter of drinking water containing 0.6 ppm of sodium fluoride to provide a recommended concentration of 1.75 ppm
June 23, 2014

chemistry
Calculate the atomic mass of naturally occurring molybdenum (Mo) which contains the following isotopes. Isotope Abundance (%) Atomic mass (a.u.) 92Mo 15.8 91.91 94Mo 9.0 93.90 95Mo 15.7 94.91 96Mo 16.5 95.91 97Mo 9.5 96.91 98Mo 23.5 97.91 100Mo 9.7 99.91
June 22, 2014

math
If 50ml of a 7.5% (w/v) sodium bicarbonate injection are added to 500ml of a5% dextrose injection , what is the percentage strength (w/v)of sodium bicarbonate in product?
June 22, 2014

math
Apharmacist incorporates 6g of coal tar into 120g of a5% coal tar ointment calculate the percetage (w/w) of coal tar in finshed product
June 22, 2014

Math
Thank you so much !
June 20, 2014

Math
Can someone help me with this question? It's urgent..
June 20, 2014

Math
Remove one value from the following data to make each statement true. 32,45,82,99,15,102,75,15,15,75,2,75 a)The mean is 56.09 How do you know the removed value makes it true?
June 20, 2014

Math
Thank you
June 20, 2014

Math
In a skating competition, the marks of judges are randomly selected to count. Then the highest and lowest marks are dropped, and the skater receives the mean of the remaining marks. There are some of the marks that 11 judges gave a skater for a free-skating program. 6.75, 6.25...
June 20, 2014

physics
A rifle bullet with a mass of 16.5 g traveling toward the right at 285 m/s strikes a large bag of sand and penetrates it to a depth of 22.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.
June 18, 2014

POL 201 week 1 Quiz
Question : In John Locke’s social contract, we Student Answer: submit to the absolute authority of the sovereign. INCORRECT donate all our property to the aristocracy. can rebel against the sovereign whenever we want. CORRECT exchange our absolute liberty for political ...
June 9, 2014

POL 201 week 1 Quiz
Question 1.1. In John Locke’s social contract, we (Points : 1) submit to the absolute authority of the sovereign. donate all our property to the aristocracy. can rebel against the sovereign whenever we want. exchange our absolute liberty for political freedom. Question 2...
June 9, 2014

physics
a pendulum is swinging back and forth once every 1.25 second, how much longer should the pendulum be to increase its period by 0.200 second
May 16, 2014

Geometry
if v = (1, 2) and w = (3, -4) find the coordinates of 4v - w
May 14, 2014

Geometry
if the angle of rotation with respect to lines l and m measures 30 degrees, then l and m intersect to form an angle of how many degrees? is it 30 degrees?
May 14, 2014

Geometry
im thinking its D?
May 13, 2014

Geometry
which of the following applies to the graph of y = -2x + 4? a. m = -4; y-intercept = 2 b. m = 2; y-intercept = -4 c. m = 4; y-intercept = -2 d. m = -2; y-intercept = 4 thank you!
May 13, 2014

chemistry
Radioactive decay is a process that follows first-order kinetics. The half-life of 32P is 0.03920 years; how long (in minutes) would it take for the amount of 32P to decrease to 53.25% of its initial amount? I don't understand at all what to do here
May 11, 2014

Chemistry
How can I determine the overall electrochemical reaction that proceeds spontaneously? Cd2+ | Cd, Co2+ | Co 1. Cd+Co2+ −¨Cd2++Co 2. Co+Cd2+ −¨Co2++Cd (1. and 2. are answer choices)
May 11, 2014

Chemistry
Yes, and there is no water involved.
May 11, 2014

Chemistry
Given the Na+/Na and K+/K half-cells, determine the overall electrochemical reaction that proceeds spontaneously and the E0 value. Answer in units of V Can you please explain the steps?
May 11, 2014

physics
the length of nylon rope from which a mountain climber is suspended has a force constant of 1.40*10^4. how much would this rope stretch to break the climbers fall if he freefall 2.00 m before the rope run out of slack
May 4, 2014

physics
suppose the length of a clock's pendulum is increased by 0.01 exactly at noon what time will be exactly next day by noon
May 4, 2014

physics
The formation of condensation on a glass of ice water causes the ice to melt faster than it would otherwise. If 8.00 g of condensation forms on a glass containing both water and 200 g of ice, how many grams of the ice will melt as a result? Assume no other heat transfer occurs.
April 27, 2014

physics
if 20g of steam at 100 c is mixed into 80 g of water at 20 c what is the final temperature if no heat lost
April 27, 2014

Math
What is the Schlafli Notation?
April 27, 2014

Chemistry
For the formation of ammonia, the equilibrium constant is known to be 5.2 × 10^−5 at 25◦C. After analysis, it is determined that [N2] =3M and [H2]=0.8M, both at equilibrium. How many grams of ammonia are in the 10L reaction vessel at equilibium? Use the ...
April 27, 2014

Chemistry
The compound M2X3 has a molar solubility of 0.0190 M. What is the value of Ksp for M2X3? Here are the choices: 1. 3.52 × 10^-6 2. 4.12 × 10^-5 3. 8.91 × 10^-8 4. 2.48 × 10^-9 5. 2.67 × 10^-7
April 27, 2014

Chemistry
So I disregard the temperature?
April 27, 2014

Chemistry
At 25C, an equilibrium mixture of gases con- tains 0.00680 mol/L PCl3, 0.0290 mol/L Cl2, and 0.00500 mol/L PCl5. PCl5(g) ⇀ ↽ PCl3(g) + Cl2(g) What is the equilibrium constant for the reaction? How would I do this? I'm so confused!
April 27, 2014

grammar
Does it have to be about a specific topic, or can we use any words? ex: Food for he letter F.
April 27, 2014

Chemsitry
If Kc = 6.38 × 105 for the reaction A(g) ⇀ ↽ 2B(g), what is Kc for the reaction written as 2B(g) ⇀ ↽ A(g)? How would I solve this?
April 26, 2014

Chemistry
NH4NO3(s) ¡æ N2O(g) + 2H2O(§¤). How much water is produced if 22.9 g of N2O is produced in this reaction? Answer in units of g I converted grams of N2O to mol. Then I did a mol ratio getting mol of H2O. Then I converted mol of H2O to grams. I got 18....
April 26, 2014

Chemistry
How many of the following changes would alter the numerical value of the equilibrium constant Kp for the reaction 2OF2(g) ⇀ ↽ O2(g) + 2F2(g)? I) an increase in temperature II) a decrease of the container volume III) adding more O2 at constant volume IV) adding a ...
April 26, 2014

Manegerial accounting
calculate the net operating income , evergreen corp has provided the following data: sales per period 1000 units ,selling price $ 40 per unit , variable manufacturing cost 12 per unit, selling expenses $5,100 pls 5% of selling price , administrative expenses $3,000 plus 20% of...
April 24, 2014

3 physics question please help quick
Two point charges of opposite sign are brought close together. Which statement best describes the field lines of the combined point charges? (Points : 1) The field lines from the positive charge point toward the negative charge. The field lines from the positive charge point ...
April 21, 2014

HELP! 5th grade math
Thank you!! how can i explain to her how to come up with the 2265? I get 2 L and 2L and she will only know that 2L converts to 2000ml how can she figure that leftover out? sorry this stuff totally confuses me :)
April 13, 2014

HELP! 5th grade math
Trying to help my child in 5th grade. Shannon pours 4 different liquid ingredients into a bowl The sum of the liquid ingredients is 8.53 liters. Two of her measurements are in milliliters and two of her measurements are in liters. Give an example of possible measurements for ...
April 13, 2014

Math
finding the slope of the line containing points with coordinate (-2,3) and (1,-3) by the definition
April 11, 2014

5th Grade Math
OMGosh Please help me (mom) so I can help my daughter with this word problem!!! Cam rode her bike 5 times as far as Dante did. Dante rode 187 meters farther than Michael did. Cam rode 15.25 kilometers. How many meters did Michael ride? Explain how you got your answer......
April 10, 2014

chemistry
If during an experiment, only potassium channels open on a neuron, what do you expect will happen to the membrane potential? Why?
April 8, 2014

science -heredity
there are about 100,000 genes in each cell. Why would it be important scientists to identify what every one of these genes does? I put Genes will describe a trait of a person, example, it will determine if a person will be small or tall; blue or brown eyes and brown or blond ...
April 6, 2014

chemistry
Based upon the intermolecular forces present, rank the following substances according to the expected boiling point for the substance: MgF2, H2O, HCl, N2
April 3, 2014

Physics
What capacitance in needed in series with an 785 µH inductor to form a circuit that radiates a wavelength of 199 m?
March 28, 2014

econ
The terms below are measures or individual components of the money supply. Specifically considering the money supply of the United States, rank these items from largest to smallest in terms of dollar value. Currency, M2,M1,Balances in savings accounts, travelers check
March 27, 2014

econ
economics- what is the law called where cost of input increases so cost of output must increase (in order to keep max profit)
March 24, 2014

chemistry
calculate the freezing point of an aqueous solution of 15.5 grams of glucose dissolved in 150 grams of water
March 22, 2014

physics
the frequency of wave A is 250 hertz and the wavelength is 30 cm. the frequency of wave B is 260 hertz and the wavelength is 25 cm. which is a faster wave?
March 17, 2014

Chemistry
Sorry. I just want to be sure that I am doing it right.
March 11, 2014

Chemistry
Determine the pH of a 1.2×10^−2 M solution
March 11, 2014

Chemistry
What is the pH of a solution whose [H3O+] is 9.2× 10^−9 M?
March 11, 2014

Chemistry
Do I use: pH= -log[h30+]
March 11, 2014

Chemistry
Thamks! How do I determine the pH value of this solution?
March 11, 2014

Chemistry
A solution contains 0.00245 M HCl. Determine the [H3O+] for the solution. points Determine the [OH-]
March 11, 2014

Chemistry
In neutralization reactions, acid + base ¨ salt + water HCl can be neutralized with NaOH. How many moles of NaOH will it take to neutralize 0.68 L of 0.29 M HCl? Is there a formula that I need to use here?
March 11, 2014

Chemistry
Thank You!! I got it right! My answer is 22.10853.
March 11, 2014

Chemistry
You have a vinegar solution you believe to be 0.8 M. You are going to titrate 21.39 mL of it with a NaOH solution that you know to be 0.774 M. At what volume of added NaOH solution would you expect to see an end point? Answer in units of mL
March 11, 2014

Math
What is the solution of: u-7+(-3)=-12
March 11, 2014

Ashford PHI 208
1. Tom Regan’s view of animals is that (Points : 1) They are important but not quite as important as human beings They have rights, which means that they should never be used for human purposes They may be ethically used because they were bred and raised for that purpose ...
March 9, 2014

econ
In the country of Ambiguostan, the government is providing salt-mine concessions to USalt & Co, but due to recent elections, will be revoking these concessions in 9 years. Since the salt business will be booming for years to come, USalt & Co is a highly traded stock and will ...
March 6, 2014

math
leah has three fewer than 4 times as many dvds as Sonia has. Leah has 37 dvds. how many dvds does Sonia have?
March 5, 2014

chemistry
how are buckeyballs,diamond, and graphite similar? how are they different?
March 5, 2014

calculus
Find the correct values for the equation -x^3 +bx^2 +cx + d, using this information, local min x= -5, local max (1,11). Point of inflection = -2.
March 5, 2014

Math
How do I use gauss-jordan to solve this? Can you explain the steps and show what you multiplied, added, subtracted, etc to each row? 8x + 2y = -68 -7x - y = 55
March 4, 2014

physics
11) Three point charges of magnitudes +6.0 mC, -7.0 mC, and -13 mC are placed on the x-axis at x = 0 cm, x = 40 cm, and x = 120 cm, respectively. What is the force on the -13 mC charge due to the other two charges? A) -0.55 N B) -0.79 N C) 0.55 N D) 0.79 N
March 4, 2014

accoutning
What should I credit in this journal entry: If the owner of a company puts 50,000 of his own money into the company and gets 4,000 shares of stock. I know I need to debit cash but what do i credit? Thanks
February 27, 2014

math
Jason left home at 6:12 pm on march 25. He arrived back home 36 hours and 12 minutes later. What time did he arrive home?
February 26, 2014

Math
joe has a farm with 99 animal, four times as many cows as horses, twice as many horses as pigs. how many cows, horses and pigs are there?
February 26, 2014

5th grade math
thank you!!!
February 25, 2014

5th grade math
sue and dave shared 1/3 pound of cherries equally. What fractional part of a pound did each get? Molly wrote the following equation to solve the problem: (2 divided by 1/3) 2/1/3=n. Do you agree with Molly's equation? support your answer with information from the problem. ...
February 25, 2014

5th Grade Math
Thank you so much, I had used something similar but with Pizza but apparently cake was more appealing when I explained it to her, so Thank you. Okay Now there is one that i can't even think of.........Write a Word Problem for..... 4/5 x 1/4 + 3/5 = 4/5 Sheesh! Any ...
February 24, 2014

5th Grade Math
I didn't see how to turn that problem into a word problem on that page. Doesn't mean it's not there, I just didn't see it. She knows how to multiply the problem, it's coming up with a word problem that she can't see out of it. :)
February 24, 2014

5th Grade Math
3/4 x 1/2 = 3/8 Need to write a word problem for this equation, and then my daughter has to draw a model to show the product. She doesn't believe that the equation I gave her is useable so I am turning to here. Thank you!
February 24, 2014

chemistry
In the net ionic equation for the neutraliza- tion reaction between hydrofluoric acid (HF) and sodium hydroxide (NaOH), the HF is rep- resented as 1. the molecule, HF. 2. neither the molecule nor the separated ions since it is a spectator in the reaction. 3. the ...
February 23, 2014

Chemistry
Which of the following substances would be expected to be the strongest electrolyte (best conductor of electricity) in solution with H2O as the solvent? 1. HF 2. BaF2 3. PCl3 4. CH3OH
February 23, 2014

math
20%is less than 32
February 23, 2014

chem
The bond length of RbF is 284.00 pm. What would be the dipole moment, in D, of this compound by assuming a completely ionic bond? Remember e = 1.60x10-19 C; 1 D = 3.34x10-30 C*m
February 23, 2014

chem
Radioactive substances decay by first-order kinetics. How many years would be required for a sample containing strontium-90 to decrease to 58.32% of its initial activity? The half-life of strontium-90 is 2.88e1 years.
February 22, 2014

college chemistry
awesome thanks!
February 22, 2014

math
given THE DERIVATIVE 8X^3+ 9X^2 -2X +5. find the original equation using (2,3)
February 18, 2014

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