Friday
December 19, 2014

Posts by James


Total # Posts: 1,893

algebra
Traveling downstream a certain boat went 21 mph. Traveling upstream it went only 5 mph. Find the speed of the boat in still water and the speed of the current.
December 18, 2014

Chemistry
If 25.00 ml of H2SO4 solution is titrated to an end point with 32.16 ml of 0.1986 M NaOH, what is the molarity(M) of the H2SO4 acid?
December 14, 2014

Chemistry
Which of the following factors affect the solubitity? a)temperature of the solutions b)polarity of the solvent vs solute molecules c)partial pressure of the gas above the solution d) all of the above
December 14, 2014

Math
A boy is dividing M&Ms between himself and his sister. He gives 2 to his sister and takes 2 for himself. He gives 2 to his sister and takes 4 for himself. He gives 2 to his sister and takes 6 for himself, and so on. (b) After n rounds, how many M&Ms does his sister have and ...
December 12, 2014

Physics
A ball of mass m is attached to a spring with a spring constant k. The system is attached to a thin vertical axis as shown in Figure 4. In its equilibrium vertical position the spring length is L. The axis starts to rotate with a constant angular frequency ω. Find the ...
December 9, 2014

AMA
A force of 1.24 N pushes against an object with a mass of 0.16 kg for 3.00 min. The object does not move. What is the work done on the object by the force?
December 8, 2014

Math
Limit(7x+6x^2) / (7x^2+6x) x->inf
December 8, 2014

Sociology
Alright. Thanks Writeacher.
December 6, 2014

Sociology
Are Ethnic Groups the same as Societies?
December 6, 2014

history
the huguenots were
December 2, 2014

Math PLEASE HELP ME
Thank You reiny do you think you can explan this one The total income from three investments was $2400. After 14 years, Investment I income has doubled, Investment II income has increased by 50% and Investment III went broke. If the income increase in Investment I equals the ...
November 30, 2014

Math PLEASE HELP ME
A man has $210,000 invested in three properties. One earns 12%, one 10% and one 8%. His annual income from the properties is $20,100 and the amount invested at 8% is twice that invested at 12%. How much is invested in each property? at 12% 10% and 8% What is the annual income ...
November 30, 2014

Math PLEASE HELP ME
A man has $210,000 invested in three properties. One earns 12%, one 10% and one 8%. His annual income from the properties is $20,100 and the amount invested at 8% is twice that invested at 12%. How much is invested in each property? at 12% 10% and 8% What is the annual income ...
November 30, 2014

Calculus
The slope of the line tangent to the curve xy+(y+1)^2=6 at the point (2, 1) is
November 30, 2014

math
The 3rd term of a geometric progression is nine times the 1st term.if the 2nd term is one twenty fourth the 5th term.find the 4th term.(there is a mistake in the 2nd to the last statement.help locate the mistake{final answer 4th term =48).i solved to this extent.ar^2=9 r=3.
November 28, 2014

math
the 3rd term of a geometric progression is nine times the 1st term.if the 2nd term is one-twenty fourth the 5th term.find the 4th term.(my solution so far).ar^2=9a r=sqr of 9 r=3.help me find the 1st term
November 28, 2014

math
The 3rd term of a geometric progression is nine times the first term.if the second term is one-twenty fourth the 5th term.find the 4th term. solution ar^2=9a r=sqr of 9 r=3.pls help me on how to get the first term(a)
November 27, 2014

math
The third term of a geometric progressiom is nine times the first term.if the second term is one-twenty fourth the fifth term.find the fourth term.ar^2=9a. r=sqr of 9 r=3.pls teach me how to get the first term and i can get the 4th term myself
November 27, 2014

Chemistry
Provide the name(s) for the branched constitutional isomer(s) with the molecular formula C7H16 that have three methyl groups.
November 24, 2014

Chemistry
Provide the name(s) for the branched constitutional isomer(s) with the molecular formula C7H16 that have three methyl groups.
November 24, 2014

Math
A stone was dropped off a cliff and hit the ground with a speed of 112 ft/s. What is the height of the cliff? (Use 32 ft/s2 for the acceleration due to gravity.)
November 20, 2014

Math
A particle is moving with the given data. Find the position of the particle. v(t) = 1.5sqrt(t), s(9) = 33
November 20, 2014

geography
How has Mexico's culture been shaped by conflict among different people?
November 20, 2014

chemistry
3. After removing membranes from an eggshell, the shell is dried and its mass is recorded as 5.613 g. The egg is transferred to a 250 mL beaker and dissolved in 25 mL of 6 M HCL. After filtering, the solution containing the dissolved eggshell is diluted to 250 mL in a ...
November 18, 2014

science
A 2000kg car traveling at a speed of 27m/s skids to a halt on wet concrete where μk = 0.20.
November 17, 2014

Science, Chemistry
Write reactions showing how each of the following buffers would neutralize added HCl. HF and NaF Express your answer as a balanced chemical equation. Identify all of the phases in your answer. HC2H3O2 and KC2H3O2 Express your answer as a balanced chemical equation. Identify ...
November 16, 2014

Science, Chemistry
Write neutralization reactions for each of the following acids and bases. HNO3(aq) and Ba(OH)2(aq) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
November 16, 2014

accounting
a 10 year coupon bond that yield 5% is issued with a 1000 par value. what is the issuance price of the bond
November 13, 2014

Math
Question: Write a word problem using 7 groups. And then solve the problem Can you give an example?
November 12, 2014

Physics
1800n
November 9, 2014

Physics
A cannon is fired from the ground at an angle of 30 degrees. It is being shot an an initial velocity of 200m/s. What is the maximum height of the cannon ball? How fat will the cannon ball travel before it hits the ground
November 7, 2014

Computing- Python (simple-ish stuff)
Great thanks so much!
November 5, 2014

Computing- Python (simple-ish stuff)
Hi, I'm working on this piece of code: numLaptops = 7 laptopCost = 599.50 price = numLaptops * laptopCost print("Total cost of laptops: $%.2f" % price) But the question wants me to explain teh output if I put 2.5 instead of .2, 8.2 instead of it and 3.1 instead ...
November 5, 2014

chem
Calculate the total pressure in the flask after all of the oxygen has been removed from the air in the flask. Assume that the temperature is 25¡ÆC, the initial barometric pressure is 760 torr and that air is 21% oxygen by volume.
November 4, 2014

chemistry
A chemist wants to make 5.50 L of a 0.300 M lithium phosphate solution. What mass of lithium phosphate must be used to make this solution?
November 3, 2014

statistics
Suppose that the amount of time it takes the IRS to refund to taxpayers is normally distributed with a mean of 12 weeks and a variance of 9. a. What percent of taxpayers should get a refund within 5 weeks? b. What percent of taxpayers will get their refund within 10-15 weeks? ...
October 28, 2014

research methods grant writing
The table labeled “Brooklyn Precinct Activity Measures” shows counts of different indicators from the June 1999 Compstat report. All data are totals for the period January 1, 1999, through June 20, 1999. Notice, in the key to this table, that some indicators are ...
October 28, 2014

calculus
A lamp post 3m high is 6m from a wall. A 2m man tall is walking directly from the post toward at 2.5m/s. How fast is his 1.5 from the wall
October 20, 2014

mathematics
what is algerdra
October 17, 2014

chemistry
a sample of freon-12 occupies 25.5 litters at 28 celsius find its volume at 15 degree celcius when the pressure is kept constant
October 16, 2014

physics
A water balloon is launched at a building 24m away with an initial velocity of 18 m/s at an angle of 50° above the horizontal. If the balloon misses or shoots over the building, how far will the balloon land from its launch location?
October 13, 2014

physics
A water balloon is launched at a building 24m away with an initial velocity of 18 m/s at an angle of 50° above the horizontal. At what height will the balloon strike the building?
October 13, 2014

Cheeeem
how to calculate the weight of solute req'd to prepare 1 liter of 1 normal of: a.) LiOH b.) phosphoric acid HELP.
October 12, 2014

Physics
A plane starts from rest at the end of a runway and requires 200.0 km/h for takeoff . If it takes 30.0 a to reach takeoff speed, what acceleration must the plane's engines provide to get off the runway ?
October 7, 2014

CALCULOUS
A bank account is growing by 4.3 % per year. Find the doubling time. Round your answer to the nearest integer. Can someone explain how to solve this step by step. I have been stuck on this for quite a while
October 3, 2014

Pre Calc
Use the Rule of 70 to estimate how long it takes a dollar-sign 7000 investment to double if it grows at the annual rate 7 %. Compare with the actual doubling times. Round your answers to three decimal places. I found the estimated doubling time using Rule of 70 to be 10. I am ...
October 3, 2014

us history
These committees act as study groups for the House and Senate. (1 point) select committees conference committees joint committees standing committees
September 27, 2014

Math
Using the following cash flows for projects A and B, use payback period, discounted payback period, NPV, IRR, and MIRR to see if these are good projects or not. > Project A: (283,000); 46,000; 89,000; 104,000; 123,000; 187,000; and 72,000 > Project B: (318,000); 72,000; ...
September 27, 2014

Engineering Dynamics
A ball is thrown so that the motion is defined by the equations x=5t and y=2+6t-4.9t^2, where x and y are expressed in meters and t is expressed in seconds. a) find velocity at t=1s, b) find the horizontal distance the ball travels before hitting the ground.
September 25, 2014

physics
An airport has runways only 196 m long. A small plane must reach a ground speed of 38 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport? Answer in units of m/s 2
September 23, 2014

physics
a 700 newton man is able to climb up 4.5 meters on a 6 meters ladder before it slips. What must be the coefficient of friction be if the ladder is arranged so that it makes an angle 50 degrees with the ground? Assume the ladder to be uniform and weighing 450 newtons.
September 23, 2014

math
an object weighing 40 tons hits an object at 40 MPH what is the force of the impact?
September 12, 2014

math
If bacterium divides every 20 minutes. How many will there be in a day?
September 10, 2014

Physics for Technology
I have been out of school 27 years; no Algebra or Trigonometry training: only remedial math. This class is part of a Diploma program, no placement test required - I am out of my depth. I had a tutor for an hour last Tues., with another appt. this Tues. Yet, like I told my ...
September 6, 2014

Chem
Determine the number of protons and electrons in each of the following ions. Na+ Enter your answers numerically separated by a comma. Np, Ne =
September 5, 2014

college algebra
1. simplify x^2+x-6/x^2-4 divided by x+3/2x+4
September 2, 2014

trigonometry
Write the quadratic function whose zeros are: 1. 2+square root of 5, 2-square root of 5 2. 3+7i,3-7i 3. 5±i Please tell me how to get them. I have no clue on how to solve them.
August 27, 2014

eng9
The White House has been home to many animals as well as presidents. (1 point) common noun proper noun compound noun collective noun
August 24, 2014

physics
A ship at sea is due into a port 600 km due south in two days. However, a severe storm comes in and blows it 200 km due east from its original position. How far is the ship from its destination?
August 24, 2014

College Algebra 1
Using the factoring method, solve for the roots of quadratic equation 4x^2=16
August 23, 2014

College Algebra 1
Factor by using the difference of two square formula 1-25z^2
August 23, 2014

static and dynamics
A box is at rest on a 34incline. what is the force of friction parallel to the ramp if box has a mass of 50-kg
August 20, 2014

probability
A bag contains 8 red, 12 white and 4 blue marbles. If 2 marbles are selected in succession (without replacement), find the probability as a common fraction in simplest form that first is red and second is blue
August 17, 2014

math
Thanks. That helps.
August 15, 2014

math
When the perimeter of an equilateral triangle is doubled, the result is 24. The length of a side of the original triangle is A. 4 B. 6 C. 8 D. 12
August 15, 2014

chemistry
A 52.3 kg sample of ethanol is needed for a reaction. What volume in liters of ethanol should be used? The density of ethanol is 0.789 g/mL
July 27, 2014

statistics
According to the MIT Airline Data Project, American Airlines controlled 15.5% of the domestic market in 2010. A random sample of 125 domestic passengers that year was selected. Using the normal approximation to the binomial distribution, what is the probability that more than ...
July 20, 2014

american government
With unfunded mandates, the national government?
June 29, 2014

american government
Nullification would have had the effect of returning the nation to the Article of Confederation because?
June 29, 2014

american government
The federal system can be thought of as a marble cake because?
June 29, 2014

Math
What's 25 inch by 12 1/2
June 27, 2014

Math
Your program has a proposed RDT&E-funded project scheduled to start in January 2005 which is expected to take 16 months to complete. The project is expected to cost a total of $16 million (then-year dollars), with cost expected to be incurred at a rate of $1 million per month...
June 24, 2014

Physics
Determine the electric force of a -8.0uc charge would experience when placed 14cm to the left of a 5.0uc charge. got 18N, but I'm not sure if I add the negative to the answer
June 18, 2014

Math
Write the quadratic function in standard form (if necessary) and sketch its graph. Identify the vertex. f(x)=x^2+3x+1/4
June 17, 2014

Engineering science
a 50kg mass is suspended from a spring, causing it to extend by 30mm. calceolate the spring stiffness? The mass is then pulled down a distance of 90mm and released. calculate the frequency of the resulting motion, assuming that this is simple harmonic, calculate the velocity ...
June 9, 2014

Finance
Pretty Lady Cosmetic Products has an average production process time of 40 days. Finished foods are kept on hand for an average of 15 days before they are sold. Accounts receivable are outstanding an average of 35 days, and the firm receives 40 days of credit on its purchases ...
June 7, 2014

Physics
Why is 5*10^3 multiplied by a electron charge?
June 4, 2014

correction
15m/s^2
June 4, 2014

Physics
A small charge that has lost 5.0 X 10^3 electrons and has a mass of 2.0 x 10^-6 kg experiences an acceleration of 15ms^2 when placed at a point P in space. Determine the magnitude and direction of the electric field at P
June 4, 2014

math
sqrt(350^2+400^2)=531.5ft 350+400= 750ft 750-531.5= 218.5ft The trip is 218.5ft shorter if you walk diagonally.
June 3, 2014

physics
sqrt(10^2+10^2)= 14.14m The total displacement is 14m North East
June 3, 2014

algebra
B does not equal the others .04*3000=120 .4*30=12 .4*300=120 .3*400=120
June 3, 2014

Physics
I don't think so, we just started on parallel plates in school and he assigned this question for homework and i have no clue how I would get the final velocity from what was given.
June 3, 2014

Physics
It does not say in the question
June 3, 2014

Physics
Determine the final velocity of an alpha particle (3.2x10^-19) if it is placed in a 7.2x10^6 n/c uniform field. The mass of the alpha particle is 6.64x10^-27
June 3, 2014

MGT
What is a project stakeholder? What are some examples of project stakeholders?
June 3, 2014

Science Please Help Me
R THESE THE RIGHT ANSWERS ?
June 3, 2014

chemistry
Use the systematic treatment of equilibrium to determine the pH and concentrations of species in 1.00 L of solution containing 0.065 mol citric acid (H3A), 0.025 mol 8-hydroxyquinoline (HB), and 0.040 mol KOH. Consider just acid-base chemistry. Ignore ion pairing and activity ...
May 23, 2014

Finance
The Fridge-Air Company's preferred stock pays a dividend of $4.50 per share annually. If the required rate of return on comparable quality preferred stocks is 14 percent, calculate the value of Fridge-Air's preferred stock. What fomula to use?
May 15, 2014

Math - Algebra
Ti'a rectangular gaden has perimeter of 20 meters. She wants its area to be at least 24 square metesr. Find the interval for the possible length of Tia's garden.
May 8, 2014

Math
A glass held 2/5 cup of water, Carlo poured out 3/8 cup, how much is left?
May 7, 2014

Chemistry
Did I ionize Mn2(CO3)3 correctly? Mn2(CO3)3 --> 2Mn^(3+) + 3CO3^(2-)
April 29, 2014

Math
At which points do the lines intersect 2x+y=8 y=-3(x-3) A. 0,8 B. 3,-2 C. 2,4 D. 1,6
April 28, 2014

Psycholohy
One way to measure the validity of a test would be to: you were testing for:
April 27, 2014

chemistry
What volume of ethanol must be diluted with water to prepare 315 mL of 0.620 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL
April 25, 2014

math 8th
Find the circumference of the given circle. Round to the nearest tenth. circle (1 point) 22.0 cm 38.5 cm 11.0 cm 42.8 cm
April 18, 2014

math
If Ѳ is in Quadrant II, and cos Ѳ=-3/4 , find an exact value for sin 2Ѳ.
April 18, 2014

algebra
write in expanded logarithmic form: ln (x y^3 z^7)
April 11, 2014

algebra
Solve: log x + log(x+15)=2
April 11, 2014

algebra
Solve: 7 ^(x+3) =519
April 11, 2014

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