Thursday

November 26, 2015
Total # Posts: 2,430

**Physics**

A pendulum is composed of a mass m suspended from the ceiling by a massless string of length L. If the mass is pulled back so that it is raised an amount L/4 and then released, what is the tension on the string at the bottom of the swing? A.3 mg B.4 mg C.2 mg D.5/2 mg E.3/2 mg...
*May 4, 2012*

**geometry**

how to write an equation in slope intercept form of the line through point P(8,20 with slope 4?
*May 3, 2012*

**math**

for the equation y = 1x - 25, will the value of y increase or decrease as x increases?
*May 2, 2012*

**algebra**

2x+8y-8z-22 x+2y-2z=3 5x+7y+z=-13 solve by gaussian elimination
*May 1, 2012*

**algebra**

a can of soda at 80 F is placed in a refrigerator that maintains a constant temperature of 37 F the temperature T of the soda t minutes after it is placed in the refrigerator is given by T(t)=37+43e^-0.058t find temp to the nearest degree of the soda after 7 minutes when to ...
*May 1, 2012*

**Math**

can you guys help me with this one problem? Thanks a bunch! Problem: Draw a circle whose center is at (1,2) so that the point (1,5) is a point on the circle. What is the circumference of the circle. I don't get this so please help!!!
*April 25, 2012*

**ALGEBRA**

x(x+2)=528 x^2+2x=528. At this point complete the square (x+1)^2=529 x+1=+/-square root 529 x=-1+/-23 The two solutions are 22,-24. Remember that is wants even integers. 22(24)=528
*April 25, 2012*

**Transportation and Security**

what are potential vulnerabilities of airplanes?
*April 22, 2012*

**transportation and cargo**

would these agencies have the biggest impact on global transportation security post 9/11. • TSA • Federal Emergency Management Agency (FEMA) • United States Citizenship and Immigration Services (USCIS) • U.S. Customs and Border Protection (CBP) • U.S. ...
*April 22, 2012*

**transportation and cargo security**

Thank you.
*April 22, 2012*

**transportation and cargo security**

what agencies had the biggest impact on global transportation security post 9/11. would this be like... • TSA • Federal Emergency Management Agency (FEMA) • United States Citizenship and Immigration Services (USCIS) • U.S. Customs and Border Protection (CBP...
*April 22, 2012*

**Microeconomics**

The answer is $4,000
*April 22, 2012*

**chemistry**

so d then
*April 21, 2012*

**chemistry**

A reaction will be nonspontaneous under all conditions when a. delta G is negative b. delta H is negative and DS is positive c. delta H is positive and DS is negative d. delta H is positive independent of the value and sign of DS e. delta S is positive independent of the value...
*April 21, 2012*

**chemistry**

not getting right answer how do you set it up?
*April 21, 2012*

**chemistry**

Calculate the value of ()Go for the following reaction , given the standard free energies of formation listed below each ion. Ag(SO3)_2^3- -> Ag+ + 2SO32- delta Gf, kJ/mol = -943 +77 -497 a. - 1860 kJ b. – 128 kJ c. + 26 kJ d. - 369 kJ e. + 523 kJ help no idea
*April 21, 2012*

**chemistry**

delta G for a reaction can be calculated from 1. delta Gf data 2. delta Hf and delta S data 3. equilibrium constants a. only 1 or 2 or 3 b. 1 & 2 only c. 1 & 3 only d. 2 & 3 only e. 1, 2 & 3 help
*April 21, 2012*

**chemistry**

delta G for a reaction can be calculated from 1. delta Gf data 2. delta Hf and delta S data 3. equilibrium constants a. only 1 or 2 or 3 b. 1 & 2 only c. 1 & 3 only d. 2 & 3 only e. 1, 2 & 3 help
*April 21, 2012*

**chemistry**

Free energies of formation are a. always positive b. always negative c. never zero d. measured at 298K e. more than one response above is correct help thinkin a though
*April 21, 2012*

**chemistry**

Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227C Using delta H = 81.2 kJ and delta S = 128 J/K, calculate the value of the equilibrium constant for this reaction. a 1.60 X 10-2 b. 2.1 X 10-7 c. 62.8 d. 4.9 X ...
*April 21, 2012*

**chemistry**

still not getting ans
*April 21, 2012*

**chemistry**

the new delta s= .128 81.2-(227x.128)=52.144 52.144=-rtlnk what is rt?
*April 21, 2012*

**chemistry**

Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227C Using delta H = 81.2 kJ and delta S = 128 J/K, calculate the value of the equilibrium constant for this reaction. a 1.60 X 10-2 b. 2.1 X 10-7 c. 62.8 d. 4.9 X ...
*April 21, 2012*

**chemistry**

For a particular reaction delta G is more negative than delta H. This means that a. delta S is zero. b. deltaS is negative c. delta S is positive d. delta S is negative if delta H is positive. e. delta S is negative if delta H is negative. i thought it was c?
*April 21, 2012*

**chemistry**

how do i set this up?
*April 21, 2012*

**chemistry**

The standard molar entropy value of N2 (g) is 191.5 J/K-mol, of O2 (g) is 205.0 J/K-mol and of NO2 (g) is 240.0 J/K-mol. From these values we can calculate the Delta S for the reaction N2 (g) + 2 O2 (g) produces 2 NO2 (g) to be a. – 156.5 J/K b. 636.5 J/K c. 15.5 J/K d...
*April 21, 2012*

**chemistry**

so d?
*April 21, 2012*

**chemistry**

q1=c q2 what am i looking for?
*April 21, 2012*

**chemistry**

q1)Which entries below should have the highest standard molar entropy? a. SiCl4 (s) b. CCl4(l) c. CCl4 (g) d. SiCl4 (l) q2) For the above, which should have the next highest standard molar entropy?
*April 21, 2012*

**math**

Area A sequence of smaller squares is formed by connecting the midpoints of the sides of a larger square. (a) If the area of the largest square is 1 square unit, determine the first five terms of a sequence that describes the area of each successive square. (b) Use a formula ...
*April 20, 2012*

**math**

Amit investment $750 at 8.2% per year and $1,300 at 4.9% per year.Both investments earn simple intrest.Whoch investment earns more simple intrest in a year? Show your work.
*April 17, 2012*

**Transportation and Cargo Security**

This is what I have so far... We have a strong and efficient transportation system which provides businesses with access to materials and markets, and provides people with access to goods, services, recreation, jobs, and other people. The U.S. transportation system includes ...
*April 15, 2012*

**Transportation and Cargo Security**

THIS IS THE FULL QUESTION I AM ASKED TO DO. Identify an asset such as an airport or a shipping company within the global transportation system. Develop and describe a security system that you feel would be most appropriate to protect the assets of the organization selected by ...
*April 15, 2012*

**Transportation and Cargo Secuirty**

THIS IS THE FULL QUESTION I AM ASKED TO DO. Identify an asset such as an airport or a shipping company within the global transportation system. Develop and describe a security system that you feel would be most appropriate to protect the assets of the organization selected by ...
*April 15, 2012*

**Transportation and Cargo Secuirty**

So I could put Austin Straubel International Airport at Green Bay
*April 15, 2012*

**Transportation and Cargo Secuirty**

Identify an asset such as an airport or a shipping company within the global transportation system. What does this mean? What is an asset of an airport or shipping company?
*April 15, 2012*

**transportation and cargo security**

I think I am thinking too much into this assignment. I was thinking thats what to write but than I second guess myself. Thank you for your help!
*April 15, 2012*

**transportation and cargo security**

Im chose to write about Air travel and I don't understand what it is ment by the public utilization of the system.
*April 15, 2012*

**transportation and cargo security**

Research the various U.S. transportation systems and identify the appropriate one to use for your case study. Research the selected system carefully and prepare a brief summary. The summary should include the following: An introduction to the system. Public utilization of the ...
*April 15, 2012*

**division of decimals**

.160416 divided by 4
*April 12, 2012*

**Statistics**

Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Z scores:
*April 9, 2012*

**Honors Chemistry**

1. What is the pH of a solution whose [H3O+] is 1 X 10^ -5 M? 2. What is the [H3O+] concentration of a solution with a pH of 9? 3. What is the pH of a solution whose [H3O+] concentration is 3 X 10^-3 M? 4. What is the pH of a solution with a [H3O+] concentration of 1 X 10^ -12...
*April 6, 2012*

**Math**

A warranty identification number for a certain product consists of a letter of the alphabet followed by a seven-digit number. How many possible identification numbers are there if the first digit of the seven-digit number must be nonzero?
*April 3, 2012*

**government**

B: Tort law definition: "A civil wrong, other than a breach of contract, which the law will redress by an award of damages."
*April 2, 2012*

**math**

there are 5 balls in a bag.3 are white and 2 are blue. what part is white?
*April 1, 2012*

**chemistry**

A compound weighing 115 g contains 68.3 g of carbon, 13.2 g of hydrogen, 15.9 g of nitrogen, and some amount of oxygen. What is the mass percent of oxygen in the compound?
*March 30, 2012*

**statistics**

Assume that a sample is used to estimate a population proportion p. Find the margin of error. 95% confidence; n = 250, x = 130
*March 27, 2012*

**statitics**

Suppose that a sample of n = 1,600 tires of the same type are obtained at random from an ongoing production process in which 8% of all such tires produced are defective. What is the probability that in such a sample 150 or fewer tires will be defective
*March 27, 2012*

**statitics**

Suppose that a sample of n = 1,600 tires of the same type are obtained at random from an ongoing production process in which 8% of all such tires produced are defective. What is the probability that in such a sample 150 or fewer tires will be defective
*March 27, 2012*

**statistics**

Suppose that SAT scores among U.S. college students are normally distributed with a mean of 450 and a standard deviation of 150. What is the probability that a randomly selected individual from this population has an SAT score at or below 600?
*March 27, 2012*

**statistics**

Jack’s ACT score is 30. Jason’s SAT score is 950. Who did better? The mean SAT score is 1000 with a standard deviation of 100 SAT points. The mean ACT score is 22 with a standard deviation of 3 ACT points
*March 27, 2012*

**Calculus**

Find the volume of the solid formed when the area bounded by x^2-y^2=9, y=x+5, and the x axis is rotated about x=1.
*March 27, 2012*

**Math**

Boys have to be either 3, 6, 9, or 12 because you have to be able to take 2/3 of them and get a whole number. The number of girls for each of these cases is 10, 7, 4, 1. You have to be able to take 1/4 of this number and also get a whole number, 4 is the only one that works so...
*March 27, 2012*

**Math 8 **

6 1/2 joules. particles looses 0.08 joule of energy every 15 seconds what will energy after 4 minutes. Would this be 6 1/2 - 1.28 divide by 4
*March 25, 2012*

**Math 8 **

how do you dilate a figure under 1
*March 25, 2012*

**Math**

6 divided by 1.00 will tell you how much each one is.
*March 25, 2012*

**chemistry**

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 2.35 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
*March 24, 2012*

**chemistry**

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 2.35 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
*March 24, 2012*

**math**

alex is x years old his sister is 3 years older , togerther their age is 57. what is the equation for this.
*March 22, 2012*

**math**

alex is x years old his sister is 3 years older , togerther their age is 57. what is the equation for this.
*March 22, 2012*

**Physics**

This is all that was given
*March 22, 2012*

**Physics **

Calculate AMA given μk = 0.019 and an angle of 11 degrees.
*March 22, 2012*

**bio**

i got D
*March 21, 2012*

**biology**

its a
*March 21, 2012*

**Economics**

I was guessing between A or D. Thank you, David. Greatly appreciate it.
*March 20, 2012*

**Economics**

The spirit of equating marginal cost with marginal revenue is not held by a.perfectly competitive firms. b.oligopolistic firms. c.perfectly competitive firms and oligopolistic firms. d.none of the statements associated with this question are correct.
*March 20, 2012*

**Economics**

Two identical firms compete as a Cournot duopoly. The demand they face is P = 100 - 2Q. The cost function for each firm is C(Q) = 4Q. The equilibrium output of each firm is: A. 8 B. 16 C. 32 D. 36
*March 20, 2012*

**Mangerial Economics**

Consider a Cournot duopoly with the following inverse demand function: P = 50 - 0.2Q1 - 0.2Q2. The firms' marginal cost are identical and given by MCi(Qi) = 2. Based on this information firm 1 and 2's reaction functions are A) r1(Q2) = 4.8 - 0.5Q1 and r2(Q1) = 4.8 - 0....
*March 20, 2012*

**math**

Templeton Extended Care Facilities, Inc. is considering the acquisition of a chain of cemeteries for $350 million. Since the primary asset of this business is real estate, Templeton’s management has determined that they will be able to borrow the majority of the money ...
*March 19, 2012*

**Maths**

Square root of 12 using prime factor form? Square root of 320 using prime factor form? Square root of 36 using prime factor form?
*March 19, 2012*

**english**

briefly summarizing the theory and discussing at least two of the “Seven Intelligences” that apply most closely to you, providing examples to illustrate your point.
*March 18, 2012*

**physics**

A 0.23 kg ball of dough is thrown straight up into the air with an initial velocity of 12 m/s.Find the momentum of the ball of dough halfway to its maximum height on the way up.
*March 15, 2012*

**Chemistry**

Original deltaG=288.9 deltaG(system)=deltaG[CO2]+deltaG[M]-deltaG[MO2]-deltaG[C] look up deltaG value from table for CO2=-394.4 DeltaG for a solid is almost always zero (C) So -394.4+288.9=deltaGsystem then K=e^((deltaGsystem)/((8.314/1000)*298)))
*March 14, 2012*

**HS Chem**

Using terms of equilibrium, what is the difference between spilling a glass of milk versus ozone eminating from your copy machine?
*March 13, 2012*

**Math 7th Grade**

A car cost $65 per day to rent plus $.35 per mile. Joe rents car for 1 day and drives 115 miles. what is the equation and the solution. The solution is pretty simple $65 + .35x115 = 105.25 I can't figure out the equation.
*March 12, 2012*

**chemistry**

Using standard heat of formations. (Appendix II in text). Calculate the standard enthalpy change for the combustion of methane. CH4 (g) + 2 O2 ---¨ 2CO2(g) + 2H2O (l) ƒ¢H0 = ?
*March 6, 2012*

**Chemistry**

Calculate the [H+], [OH ‾ ], and the pH of 0.16 M solutions of: hydroxylamine (HONH2, Kb = 1.1 10-8)
*March 5, 2012*

**Chemistry**

Calculate the pH of a 5.90x10-3 M solution of H2SO4.
*March 5, 2012*

**Chem Acids/Bases**

A 25.00 mL sample of H3PO4(aq) requires 31.05 mL of 0.2410 M KOH for titration to the second equivalence point. What is the molarity of the H3PO4(aq)?
*March 3, 2012*

**Chemistry**

Write the dissociation reaction and the corresponding Ka equilibrium expression for each of the following acids in water. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer. Omit water in your answer.) (a) HC_2H_3O_2 (b) Co(H2O...
*March 3, 2012*

**principles of physics**

A carnival has a Ferris wheel where the seats are located halfway between the center and outside rim. If you were at the outside rim, your angular speed while riding on this Ferris wheel would be A) more and your tangential speed less.B) less and your tangential speed more.C...
*March 2, 2012*

**principles of physics**

If the Earth had two identical moons in one circular orbit, and the moons were as far apart in that orbit as they could be, the center of gravity of the Earth-moons system would beA) at the center of the Earth.B) outside the Earth, but beyond the orbital path of the moons.C) ...
*March 2, 2012*

**principles of physics**

Very ideally, and very strictly speaking, the falling leaves in autumn make the world spin a bit ____________________. A) All of these.B) faster.C) slower.D) off center and erratic.E) smoother.
*March 2, 2012*

**principles of physics**

When a skater brings her arms in when spinning, she increases her ____________________. A) angular speed.B) Both of these.C) Neither of these.D) angular momentum.
*March 2, 2012*

**principles of physics**

The main reason railroad trains remain on their tracks has to do with the ____________________. A) None of these.B) beveled shape of the wheel circumference.C) independence of opposite wheel motions.D) All of these. E) flange on their wheels.
*March 2, 2012*

**principles of physics**

When we studied the concept of work, we learned that work = force x distance. Now we learn that torque = force x distance. What's different about these two definitions?A) For work, distance and force are in the same direction; for torque they are perpendicular to each ...
*March 2, 2012*

**physics**

An 840 Kg roller coaster car is launched from a giant spring of constant k=31 kN/m into a frictionless loop-the-loop track of radius 6.2 m, as shown below. What is the minimum amount that the spring must be compressed if the car is to stay on the track?
*February 29, 2012*

**Math -Tutor help only please! **

Solve: 2/12x-3/12=8/12 Is x = 11/2 the correct answer?
*February 25, 2012*

**Math**

Solve: 3 - x = 12(x - 1) Is the correct answer x = 15/13?
*February 25, 2012*

**chemestry**

Calculate [OH^ - ] for strong base solution: 14.0 mL of 1.20×10−2 M Ca(OH)_2 diluted to 430.0 mL.
*February 22, 2012*

**math**

use I and a dot to show the number 52
*February 22, 2012*

**math**

I have a math question abdedbabde 1234321234 how do I do this problem
*February 21, 2012*

**biology**

Regulation of an enzyme's activity occurs a) before the enzyme is produced b) during the production of the enzyme. c) when the enzyme already exists in the cell. d) at any point on the enzymatic production pathway. Thank you
*February 20, 2012*

**Physics**

You push a 2.5 kg block against a horizontal spring, compressing the spring by 16 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 60 cm from where you released it. The spring constant is 200 N/m. What is the block-table coefficient ...
*February 19, 2012*

**Math**

the green bay packers ordered roast beef subs and turkey subs for lunch. a total of 53 subs were ordered. the number of roast beef subs ordered is 2 more than twice the number of turkey subs. write and solve a system of linear equations to determine how many roast beef subs x ...
*February 16, 2012*

**math**

2/3 x 3 top and bottom you get 6/9 + 7/9 = 13/9 = 1 and 4/9 .
*February 15, 2012*

**algebra**

i need to know how to do (4m -3power n5power)0 / mn
*February 15, 2012*