Thursday

July 30, 2015

July 30, 2015

Total # Posts: 3,311

**Math**

how do you solve this, its about rational expressions ?? 4 /X^2 – 4x+1 + 2/ x^2 -1
*July 30, 2015*

**College Psychology**

can some one explain it to me why life started in prenatal development??
*July 21, 2015*

**math**

A motorist travels 120 miles to his destination at an average speed of 60 miles per hour and returns at an average speed of 60 miles per hour and returns to the starting point at an average speed of 40 miles per hour. What is his average speed for the entire trip
*July 11, 2015*

**physics**

A ball is thrown at 22m/s at 45 degrees to the horizontal. a fence 5 feet tall is located 100 meters away. Does the ball make it over the fence?
*July 11, 2015*

**Science**

So it would be 6.4/16.05=.40 then I would do .40(-890.23)=-354.98
*July 9, 2015*

**Science**

Nevermind I realized what I needed. Thanks!
*July 9, 2015*

**Science**

I would have an answer for X, but I am confused who to approach a)
*July 9, 2015*

**Science**

The combustion of methane in a laboratory burner is represented by the following equation: CH4 + 2 O2 > CO2 + 2 H2O Given the following three thermochemical equations: C + H2 > CH4 H=-74.87kJ C + O2 > CO2 H= -393.5 2 H2 + O2 > 2 H2O H=-571.6 a) Determine the molar ...
*July 9, 2015*

**Science**

I was trying to keep sig figs. If I were trying to do it my way, I would just multiply 1.33 by 285.8 and that would get me the same answer(almost) at 380.11. Yours is 381.07
*July 9, 2015*

**Science**

would I multiply my answer from 1.3(285.8) by 2 then?
*July 9, 2015*

**Science**

The enthalpy change for the reaction 2 H2 + O2 > 2 H20 is -571.6 kJ. Determine the enthalpy change for the decomposition of 24.0g H2O. My Process -571.6 is the enthalpy of 2 mols of H2O. So the enthalpy of 1 mol of H2O will be -285.8. Since it's decomposition, -285.8 ...
*July 9, 2015*

**Science**

AHH! I accidentally put 2 mols for N2 instead of 1 I see now
*July 9, 2015*

**Science**

I got 11.8 for A and 14.15 for B
*July 9, 2015*

**Chemistry**

what does N equal? Is that the number of mols?
*July 9, 2015*

**Algebra**

Solve (log base{3} +(log_{3} x)) = -1. x =
*July 1, 2015*

**Calculus**

Ferris wheel has radius of 26m. At what rate is the rider's height increasing, when rider is 25 m from ground.
*June 21, 2015*

**english comp2**

Which thesis statement is the strongest? A. The most effective way to create jobs, in my opinion, is through government-supported programs aimed at renewing the nation’s infrastructure. B. I think the most effective way to create jobs is through government-supported ...
*June 7, 2015*

**Computers**

I don’t think piracy should be legal because people on the Internet are copyrighting other works from movies. I believe that copyright should be private of all companies that make and produce movies and shows. Piracy is theft, you’re stealing copyrighted work. You&#...
*June 4, 2015*

**cardiorespiratory fitness**

the best time to exercise is
*May 20, 2015*

**math**

how many square feet to carpet a rectangular floor that measures 24 by 19 feet?
*May 18, 2015*

**Chemistry**

For half reactions, is the equilibrium sign used? example: Zn --->Zn^2+ + 2e^- (just arrow) OR Zn <---> Zn^2+ + 2e^- (equilibrium sign)
*May 14, 2015*

**chemistry: electrochemistry unit**

The red wire on a voltmeter is the cathode and the black is the anode. This would also give a positive reading on the voltmeter. How would I explain why this is?
*May 14, 2015*

**7th of 850.000 dollars **

hi steve please help me dont now how to figure this ,--- a 7th of 850.000 dollars what would my part be thank you michael
*May 10, 2015*

**economics**

3. The following facts characterize the furniture industry in the United States:39 a. The industry has been very fragmented, so that few companies have the financial backing to make heavy investments in new technology and equipment. b. In 1998, only three U.S. furniture ...
*May 3, 2015*

**stats**

If a widget's reliability is represented by an exponential distribution with beta = 75 (weeks). What is the 50% life expectancy – e.g. the length of time where the reliability = 50%?
*April 27, 2015*

**Chemistry**

Need some direction.. where do I start? Vinegar is a 5% (mass/mass) solution of acetic acid in water. If vinegar has a density of 1.06 g/mL, what is the concentration in molar?
*April 25, 2015*

**Managerial accounting**

well, I am doing direct material budget, and already have my production budget. for example for the quarter, for January I get 950, and cost for Direct material it says to be $8/unit, but it does not say the units need for production, so im confused. normally you will multiply...
*April 22, 2015*

**math**

what the heck does it mean
*April 20, 2015*

**Science**

Use the following equation: CO(g) + 2H2 (g)= CH3OH(g) delta H = -21.7 kcal Which direction will the reaction proceed after some of the methanol vapor is condensed and removed from the reaction vessel? please help im getting so confused on the directions of the reactions
*April 16, 2015*

**science**

An increase in temperature will create what type of shift in the following equation: 2SO3 = 2SO2+ O2 delta H = +197 kJ/mol? Wouldn't it be a shift right because there is heat involved?
*April 16, 2015*

**math**

I can't figure this one. At a math contest,12 problems were given. Five points were awarded for each correct answer,and two points were deducted for each incorrect answer. Matt's score was 39.How many correct answers did he have.5-2(12-5)=39,5-24+2=39,7=63,9
*March 31, 2015*

**math**

5-2(12-5)=39 5-24+2=39 7=63 9 Am I doing this right
*March 31, 2015*

**math**

I need a formula. At a math contest,12 problems were given. Five points were awarded for each correct answer, and two points were deducted for each incorrect answer. Matt's score was 39. How many correct answer did he have
*March 31, 2015*

**Math**

There is a test with 10 questions. Each question has a choice of three answers, but only one answer is correct. How many ways are there to fill out the test? By the way, we are learning combinations and permutations
*March 30, 2015*

**Physics**

a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 212 m. If the red car has a constant velocity of 23.0 km/h, the cars pass each other at x = 44.2 m. On the other ...
*March 29, 2015*

**geometry **

In quadrilateral QRTS, we have QR = 11, QS = 9, and ST=2. Sides line RQ and line ST are extended past Q and S, respectively, to meet at point P. If PS = 8 and PQ = 5, then what is RT?
*March 28, 2015*

**MATH**

Sam invested part of his 36,000 bonus in a fund that paid an 8% profit and invested the rest in stock that suffered a 5% loss find the amount of each investment if his overall net profit was 2,750
*March 26, 2015*

**physics(Please respond)**

if a rock is dropped into a well and it takes 17 seconds to hit the water how far down is the water level from the top of the well
*March 13, 2015*

**Criminal Justice**

Planned, premeditated killings of family members whose behavior is judged to have brought shame or dishonor to the family are referred to as:
*March 13, 2015*

**math**

If Benjamin drove at a constant rate, how many milesper hour did he drive?
*March 10, 2015*

**math**

Is sin function continuous?
*March 4, 2015*

**Calculus I**

A spherical balloon is inflated at a rate of 10 cm^3/min. How fast does the radius change when the radius is 20 cm? Need help with set up and work through of problem.
*March 2, 2015*

**Calculus I**

Sand falls from a hopper into a conical pile with radius equal to half its height. The sand is poured at a rate of 3 m^3 each minute. How fast is the radius increasing after 10 minutes? Need help with the set up and work through of the problem.
*March 2, 2015*

**CHemistry**

What is the pH of the resulting solution when 0.20 mole of NaF and 0.05 mole HCl are added to 100 mL water? The Ka for HF is 3.95x10^-4M
*March 1, 2015*

**campbell drive**

Tickets cost $8.00 each for adults and $2.50 each for kids, and the group paid $46.50 in total. There were 6 fewer adults than kids in the group. Find the number of adults and kids on the trip. # of adults = # of kids =
*February 27, 2015*

**computers**

You have inserted an image within a paragraph of text in a Word 2007 document. You want the edges of the image to fade into the document. How do you accomplish this?
*February 25, 2015*

**science**

CAN ONE IN THEORY OR ACTUAL DEPRIVE A PARTICULAR AREA OF SPACE; 1sq mile of space of oxygen while the surrounding area of space has normal levels of oxygen?.... This question is not limited by the use of other chemicals or machinations to achieve GOAL....
*February 24, 2015*

**Math**

Stuck on solving for unknowns in part F and G help please? a) the upper loop 1 18I12+ 13I18=30 (b) the lower loop 2 =5.00I36 - 18I12= 24 (c) the node on the left side 3 I12+I36=I18 (d) Solve the node equation for I36. 4 I12 - I18 =I36 e) Using the equation found in (d), ...
*February 23, 2015*

**physics**

Stuck on solving for unknowns in part F and G help please? a) the upper loop 1 18I12+ 13I18=30 (b) the lower loop 2 =5.00I36 - 18I12= 24 (c) the node on the left side 3 I12+I36=I18 (d) Solve the node equation for I36. 4 I12 - I18 =I36 e) Using the equation found in (d), ...
*February 23, 2015*

**physics**

Three identical charges (q =4.3 µC)lie along a circle of radius 1.9 m at angles of 30°, 150°, and 270°, as shown in the figure below. What is the electric field at the center of the circle? I THOUGHT IT WOULD BE ZERO BUT MY PROF TELLS ME THAT'S WRONG WHY?
*February 18, 2015*

**water dynamics**

a projectile 20ft in lentgh 4-6 thousand lbs traveling @ 100mph @ 100ft below water surface can be stopped and/or have said projectile change its course by using how many pounds of water preasuure to achieve goal? And what are the approximate dimensions of water preassure ...
*February 11, 2015*

**Chemistry**

No because i have no idea where your "answer below" is
*February 6, 2015*

**Chemistry**

A tetrahedral site in a close-packed lattice is formed by four spheres at the corners of a regular tetrahedron. This is equivalent to placing the spheres at alternate corners of a cube. In such a close-packed arrangement the spheres are in contact and if the spheres have a ...
*February 6, 2015*

**Chemistry**

A tetrahedral site in a close-packed lattice is formed by four spheres at the corners of a regular tetrahedron. This is equivalent to placing the spheres at alternate corners of a cube. In such a close-packed arrangement the spheres are in contact and if the spheres have a ...
*February 6, 2015*

**computer**

You want somebody to code that for you, something that can take a few hours. Ask what you need help in coding inside the code, also show your coding. Start with a name. You typed a paragraph and want something the size of an essay.
*February 3, 2015*

**chem**

what would the temperature inside the pressure cooker beef the vapor pressure of water inside the cooker was 3.08 atm
*February 2, 2015*

**chem**

what would the temperature inside the pressure cooker beif the vapor pressur of water inside the cooker was 3.08 atm
*February 2, 2015*

**physics**

A small block with mass 0.308 kg is sliding down a frictionless ramp that is inclined at an angle of 53.1° above the horizontal. Assume g = 9.80 m/s2. (a) As the object slides down the incline, what is the magnitude of the normal force that the surface of the incline ...
*February 2, 2015*

**physics**

A small block is released from rest at the top of a frictionless incline. The distance from the top of the incline to the bottom, measured along the incline, is 3.70 m. The vertical distance from the top of the incline to the bottom is 1.67 m. If g = 9.80 m/s2, what is the ...
*February 1, 2015*

**Physics**

an aircraft lands on a runway with length of 205 m at a speed of 295 km/h what is the minimum constant deceleration required for a safe landing
*January 28, 2015*

**Biology**

I'm trying to find out how regular cells are similar to cancer cells? I have read the chapter 2 times already and the only thing I can come up with is they both divide to make new cells.
*January 28, 2015*

**chemistry**

a 1.00*10^1 mL sample of an unknown liquid has a mass of 7.99 g. Calculate the density of the liquid using the proper number significant figures
*January 28, 2015*

**Science**

Is the gene for sickle cell anemia more likely to be dominant or recessive?
*January 21, 2015*

**Chemistry**

The reaction of sodium hydrogen carbonate (baking soda), NaHCO3 and vinegar is a safe and effective method of opening a clogged drain a) Write the chemical equation for this reaction b) Explain why using sodium hydrogen carbonate and vinegar may be a greater alternative to ...
*January 11, 2015*

**programming**

Your funny, too much code. Learn basic coding before trying to ask to hack. It is like applying for NASA while in elementary school.
*December 17, 2014*

**program eval**

If I were doing an evaluation of an existing after-school program where involvement was voluntary, would I do a quasi-experimental design or experimental design? I'm thinking quasi-experimental as I would randomly select from those who are enrolled in the program.
*December 13, 2014*

**Biology**

name three ways somatic cells are different from gamete cells. 1. Gametes are sex cells and are always haploid 2. Somatic cells are non sex cells 3. ?
*December 12, 2014*

**Algebra**

I have to convert the equation 9x - 7y = -7 To slope intercept form Answer: 7y = 9x + 7
*December 12, 2014*

**Algebra**

convert the equation 9x - 7y = -7 Answer: 7y = 9x + 7
*December 12, 2014*

**Algebra**

standard form Ax + By = C Convert equation into standard form Y = 9/7x + 1 7y = 9x + 7
*December 12, 2014*

**algebra**

what is the slope intercept form (y = my + b) For x - 3y = 6 3y = x - 6
*December 12, 2014*

**Biology**

explain what would happen if sperm and egg cells were accidentally diploid. If the gametes were not haploid, then the fertilized zygote would have four sets of chromosomes and would probablydie before birth.
*December 12, 2014*

**physics**

A 5.00kg stone and a 50.0kg stone are released from rest at the same height above the ground. There is no appreciable air drag. Which of the following statements is or are true? (More than one statement may be true.) A. Both stones have the same initial gravitational potential...
*December 12, 2014*

**Chemistry**

At a total atmospheric pressure of 1.00 atm, the partial pressure of CO2 in air is approximately 4.0×10−4 atm. If at 20 ∘C and a partial pressure of 760 mmHg, the solubility of CO2 in water is 0.169 g/100mL, what is the solubility of CO2 in an open bottle of ...
*December 5, 2014*

**Chemistry**

What is the osmolarity of a typical oral rehydration solution (ORS) for infants that contains 95mEq/LNa+ , 25mEq/LK+ , 115mEq/LCl− , and 2.5% glucose? The molecular weight of glucose is 180 amu.
*December 5, 2014*

**Chemistry**

A pickling solution is prepared by dissolving 250g of NaCl in 4.0L of water. Calculate the osmolarity of the solution.
*December 5, 2014*

**Chemistry**

Ringer's solution, used in the treatment of burns and wounds, is prepared by dissolving 8.6 g of NaCl, 0.30 g of KCl, and 0.33 g of CaCl2 in water and diluting to a volume of 1.00 L. What is the osmolarity of Ringer’s solution?
*December 5, 2014*

**Physics**

A hollow sphere has a mass of 15 kg, an inner radius of 12 cm and an outer radius of 18 cm. What is the rotational inertia (moment of inertia) of the sphere about an axis passing through its center?
*December 1, 2014*

**Physics**

A hollow sphere has a mass of 15 kg, an inner radius of 12 cm and an outer radius of 18 cm. What is the rotational inertia (moment of inertia) of the sphere about an axis passing through its center?
*November 30, 2014*

**Math**

While playing in a soccer match, Kevin ran from his end of the field to the opposing end and back 33 times. The field is 330 feet long. How many miles did Kevin run during his match? Need someone to explain in details.
*November 29, 2014*

**Math**

The answer is 25.
*November 29, 2014*

**Math**

I'm not understanding. Please show me how to solve.
*November 29, 2014*

**Math**

The ratio of boys to girls at a day care center is 5 to 4. Which of following cannot be the total number of children at the center? A. 27 B. 54 C. 60 D. 72
*November 29, 2014*

**PHI208**

According to Leon Kass, the drive to legalize euthanasia can be largely attributed to what? the rise in a largely technical approach to healing. an increase in our sympathy an increased respect for human dignity. the secularization of modern society.
*November 26, 2014*

**PLEASE HELP CHEMISTRY **

What mass of pure silver would you obtain from 85.0 g of AgNO3? I got 53.55 g is that correct?
*November 24, 2014*

**Chemistry**

If 35.0 mL of 0.210 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Is the answer 0.8176 L Convert moles of HCl: 2.10 x 0.035= 0.00735 mol of HCl Convert to moles of H2: 0.0735 x 1 mol H2/ 2 mols HCl= 0....
*November 24, 2014*

**Chemistry**

If 35.0 mL of 0.210 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Is the answer 2.352 STP converted mols HCl to mols H2 gas: 02.10 M HCl x 1 mol H2/2 mol HCl = 0.105 mol H2 converted mols H2 gas to L: 0...
*November 22, 2014*

**chemistry**

If 35.0 mL of 0.210 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
*November 21, 2014*

**Algebra**

Evaluate these algebraic expressions; A) x + 6 when x = 2 and x = 5 B) 4x when x = 4 and x = 7
*November 13, 2014*

**Science**

In addition to Carbon and Hydrogen, which elements must be available to form a DNA nucleotide monomer?
*November 9, 2014*

**Physics**

An interacting system of two objects has no external force acting on the system. The first has a mass of 2.00kg and is moving with a velocity (2.00m/s)i + (1.00m/s)j at time t=0s. The second object has a mass of 3.00kg and is moving with a velocity (-1.00m/s)i + (1.00m/s)j at ...
*November 9, 2014*

**Math**

Use the simplex meth to solve the linear programming problem Maximize z = 8x1 + 2x2 Subject to: 4x1 + 3x2 < 11 X1 + 4x2 < 7 With x1 > 0, x2> 0
*November 6, 2014*

**Math**

Find the payment necessary to amortize a 8% loan of $1700 compounded quarterly, with 11 quarterly payments?
*November 5, 2014*

**physics**

a 10.0m long bar is attached by a frictionless hing to a wall and held horizontally by a rope that makes an angle of 53 deg with the bar the bar is uniform and weights 39.9 N. how far from the hinge should a 10.0kg mass be suspended for the tension T in the rope to be 125 N
*November 3, 2014*

**History**

What elements of modernity and progress represented nineteenth century goals of liberalism? What characteristics did nineteenth century liberals consider to be impediments to achieving a modern and "civilized" society? P.S. I really just need help understanding the ...
*November 3, 2014*

**physics**

A traffic light weighting 145 newtons hangs from a vertical cable tied to two other cables that are fastened to a support. The upper cables make angles of 31.0 degrees and 57.0 degrees with the horizontal. Find the tension in each of the three cables.
*October 30, 2014*

**math**

What is the area of a rectangular room that is 3¾ yards long and 3⅓ yards wide
*October 27, 2014*

**Statistics **

2. Given the cumulative distribution function (cdf) F(x)=(0 x<4 (x-4)/4 4 <= x <8 1 x >=8 2.1 Using the cdf, compute P(5<X<6). 2.2 What is the pdf of X? 2.3 Using the pdf, compute P(X<7). 2.4 What is E(X)? 2.5 What is V(X)?
*October 27, 2014*

**please help! physics**

A block of mass m is pushed along a horizontal table by a force F= 70 N at an angle 55 degrees with the horizontal. The coefficient of kinetic friction is 0.3
*October 20, 2014*

**physics **

A block of mass m is pushed along a horizontal table by a force f=70 N at an angle 55 degrees with the horizontal. Yhe coefficient of kinetic friction is 0.3 Find the normal force. My work: I know that there is 3 forces present: force of gravity, normal and applied. I think ...
*October 20, 2014*