Sunday

February 1, 2015

February 1, 2015

Total # Posts: 487

**chemistry**

In a coffee-cup calorimeter, 1.91 g of NH4NO3 is mixed with 75.0 g of water at an initial temperature of 25.00oC. After the solution of the salt, the final temperature was 20.94oC. Assuming the solution has a heat capacity of 4.18 J/(goC) and assuming no heat loss to the ...
*October 9, 2012*

**chemistry**

I need to determine how many grams of Cesium Iodide following solutes would be needed to make 5.00 102 mL of a 0.300 M solution.
*October 1, 2012*

**managerial economics**

Inter-temporal Price Discrimination. Suppose that technophiles are willing to pay $400 now for the latest iPhone, but only $300 if they have to wait a year. Normal people are willing to pay $250, and their desire to purchase does not vary with time. Ignore the time value of ...
*September 30, 2012*

**Physics**

A 68-g ice cube at 0°C is placed in 796 g of water at 30°C. What is the final temperature of the mixture?
*September 15, 2012*

**College Algebra**

The period (the time required for one complete swing) of a simple pendulum varies directly as the square root of its length. If a pendulum 12 feet long has a period of 4 seconds, find the period of a pendulum 3 feet long.
*September 9, 2012*

**chem**

One of the reactions that occurs in a blast furnace, where iron ore is converted to cast iron, is below. Fe2O3 + 3 CO 2 Fe + 3 CO2 Suppose that 1.86 103 kg of Fe are obtained from a 5.98 103 kg sample of Fe2O3. Assuming that the reaction goes to completion, what is the percent...
*August 7, 2012*

**Chemistry**

Hydrogen fluoride is used in the manufacture of Freons (which destroy ozone in the stratosphere) and in the production of aluminum metal. It is prepared by the reaction below. CaF2 + H2SO4 CaSO4 + 2 HF In one process 9.00 kg of CaF2 are treated with an excess of H2SO4 and ...
*August 7, 2012*

**physics**

A 326 g object is attached to a spring and oscillates with a period of 0.25 s. The total energy in this system is 5.83 J. What is the amplitude of the motion?
*July 19, 2012*

**physics**

At the grocery store, you place some produce onto a scale that has a vertically hung spring supporting the produce. The spring has a spring constant of 16 N/m. Your produce bobs up and down with an amplitude of 20 cm, and the maximum speed it reaches is 0.4 m/s. How much does ...
*July 18, 2012*

**physics**

A 5 g bullet is fired into a 2 kg wooden block attached to a spring with a force constant of 20 N/m. It lodges in the block, and the block and bullet compress the spring until they come to a rest. If the bullet was moving at 1000 m/s just before the collision, how far is the ...
*July 18, 2012*

**math**

What is the apr if the amount financed $3500; Interest Charged $ 675; Number of Payments 24
*June 12, 2012*

**Chemistry - Equilibrium**

Silver ion concentrations are needed for a solution. You have 0.050 M AgNO3, if you added 5.0mL of 12. M NH3 to 500.mL of this solution, how much silver ion in M will you have at equilibrium? [Kf for Ag(NH3)2+ is 1.5 x 10^7]
*April 25, 2012*

**math**

explain how knowing that 5/8=0.625 helps you write the decimal 4 5.8
*March 14, 2012*

**business**

Mel's Furniture recieved an invoice dated September 27 for five bedroom sets at $3,000 each. The invoice indicated a trade discount of 5/8/3. The seller of the furniture prepaid the freight of $200. Terms were 2/10 EOM.Assuming Mel pays on November 2, what amount would be ...
*March 12, 2012*

**human resources **

A truck costing $25,000 with a residual value of $5,000 was purchsed by Rim Corporation. The truck's estimated life is 10 years. At the end of Year 2,what is the book value using declining-balance method? assume a depreciation rate of twice the straight-line method.
*March 12, 2012*

**business math**

Jeff Sellers bought 200 shares of radio shack stock at $22.35. eight months later,he sold the stock at $31.76.assuming a 2% commission charge, what is the bottom line for Jeff?
*March 11, 2012*

**business math**

Pete's warehouse has a market value of $5,000,000, the property in Pete's area is assessed at 40%of the market value. the tax rate is $105.10 per $1,000 of assessed value. what is Pete's property tax?
*March 11, 2012*

**business math**

Mel's Furniture recieved an invoice dated September 27 for five bedroom sets at $3,000 each.The invoice indicated av trade discount of 5/8/3. The seller of the furniture prepaid the freight of $200. Terms were 2/10 EOM.Assuming Mel pays on november 2,what amount would be ...
*March 11, 2012*

**Physics**

A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the other side of the peak, as illustrated in Figure 3-29. If the ship shoots the projectile with an initial velocity of v = 256 m/s at an angle of...
*February 27, 2012*

**Physics**

A spy in a speed boat is being chased down a river by government officials in a larger craft. If the spy travels at 26 m/s and the officials travel at a speed of 14 m/s, how far from each other will the two vessels land after they fly off a 5.0 m waterfall?
*February 27, 2012*

**algebra**

What is the quotient if the dividend is 1/2 & the divisor is 1/8?
*February 6, 2012*

**intermediate algebra**

x^2-25/x^2+11x+24
*February 5, 2012*

**Business Finance**

2,102,000
*January 30, 2012*

**Physics**

a)91.0 km b)53.5 km/h
*January 26, 2012*

**business math**

Is the answer Mel will $500
*December 27, 2011*

**US History (Finals Tomorrow Pleasee Help)**

what were the important political parties since the election of Andrew Jackson as president to the end of the reconstruction, when the country was left with only two major parties, racially and regionally divided? Include third parties. What did they stand for. Who voted for ...
*December 6, 2011*

**US History (Finals Tomorrow Please Help)**

Keeping in mind how the expansion of U.S. territory westward threatened the delicate balance of power in congress between free and slave states and Lincoln's stance on slavery, describe how key events (such as land acquisitions, agreements about how new territories should ...
*December 6, 2011*

**u.s history**

Keeping in mind how the expansion of U.S. territory westward threatened the delicate balance of power in congress between free and slave states and Lincoln's stance on slavery, describe how key events (such as land acquisitions, agreements about how new territories should ...
*December 6, 2011*

**u.s history**

what were the important political parties since the election of Andrew Jackson as president to the end of the reconstruction, when the country was left with only two major parties, racially and regionally divided? Include third parties. What did they stand for. Who voted for ...
*December 6, 2011*

**physics**

you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 80 steps per minute, with each step 8.00 inches high. If you weigh 150 lb and the machine reports that 690 kcal have been burned at the end of the workout, what efficiency is the machine using in ...
*December 4, 2011*

**Physics**

How did you get the first part?
*December 2, 2011*

**Math**

what is the apr if the amount Financed $3500; Interest Charged $ 675; Number of Payments 24
*November 28, 2011*

**spanish**

What word best completes this sentence. ¿Dónde están Uds.? (Está) (Estás) (Estoy) (Estamos) en la clase de ciencias naturales.
*November 25, 2011*

**spanish**

What word best fits this Sentence. ¿Dónde están Uds.? (Está) (Estás) (Estoy) (Estamos) en la clase de ciencias naturales.
*November 19, 2011*

**spanish**

What word best fits this sentence? Que necesitas para la clase de ciencias naturales?________ un diccionario! (Necesitamos) (Necesito) (Necesitan) (Necesita)
*November 19, 2011*

**spanish**

Which word best fits this sentence. La clase de ciencias sociales es (facil) (aburrida) (dificil) (divertida). Hay mucha tarea todos los dias.
*November 17, 2011*

**Spanish**

I am trying to complete this Paragraph using these 7 words. 1. eres 2. soy 3. aveces 4. deportista 5. segun 6. le gusta 7. se llama. Some of the words can be used twice. Como se llama tu amigo.__________1. Kiko. Que _________2.hacer? Pues,__________3. practicar deportes y ...
*November 11, 2011*

**spanish**

Can you give me a example of what two friends do and don't like written in Spanish in an Essay.
*November 4, 2011*

**calculus**

Given f(x)=sin(x)-2cos(x) on the interval [0,2pi]. a) Determine where the function is increasing and decreasing. b) Determine where the function is concave up and concave down. ________________________________________ I know: f′(x)=cos(x)+2sin(x) f″(x)=-sin(x)+2cos...
*November 1, 2011*

**math**

14/15=2x
*October 24, 2011*

**english**

the comment of one little boy was especially movinng
*October 20, 2011*

**spanish**

How do you say 5:20,10:45,1:15,7:30,6:42 all in spanish
*October 13, 2011*

**Business/entrepreneur**

Describe how the owner uses capital and human resources to ensure revenue or control.
*October 12, 2011*

**math**

how can estimating help you add two- digit numbers?
*October 3, 2011*

**math**

simplify 20 minus 16 divided by 4 times 5 plus 10
*September 29, 2011*

**help please**

i think is D
*September 25, 2011*

**psychology**

The blind man and the elephant is a metaphor that shows how
*September 11, 2011*

** Information literacy**

Which of the following is an article from a popular magazine?
*September 10, 2011*

**algebra 1**

7x+8(2y+2x)
*September 9, 2011*

**statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*July 19, 2011*

**math 111c**

how long will it take for $2600 to grow to $20,400 at an interest rate of 6.1% if the interest is compounded continuously?
*July 6, 2011*

**Psychology **

kay Thanks
*June 28, 2011*

**Psychology **

wait can it be C?
*June 28, 2011*

**Psychology **

kay thanks
*June 28, 2011*

**Psychology **

Dr. Kyle shared the newspaper clipping with his class. "This is an unusual case, but I believe the punishment phase of the trial would have been different in another state. The crime was committed, but the defendant is not in touch with reality most of the time." Dr...
*June 28, 2011*

**math**

10. Use this figure to answer the following six questions in the essay box. is a diameter. is a tangent. a. m1 and m2b. m3c. m d. m4e. m5f. m
*June 28, 2011*

**Into to busineess**

How can lean manufacturing and near-sourcing help a company gain a competitive edge and prepare for the future
*June 12, 2011*

**math**

Convert to decimal notation. 2/3
*May 27, 2011*

**algebra **

The area A of a parallelogram with base b and height h is given by A= bh. Find the area of the parallelogram when the height is 15.4 cm and the base is 6.5cm
*May 27, 2011*

**algebra **

The area A of a triangle with base b and height h is given by A=1/2bh. Find the area when b=45m(meters) and h=86m.
*May 27, 2011*

**trig**

if point P is a point on the terminal side of 0, and 0 is in standard position, find sin 0,cos 0 and tan 0. 1. P(-6,8) 2. P (1,3) 3. P (-2,-40), 4. P (-5, -12)
*May 14, 2011*

**trig**

If cos 0 = - 1/2 and tan 0 > 0, find the quadrant that contains the terminal side of 0, and then find the exact values of the other five trig functions of 0.
*May 14, 2011*

**trig**

if sin 0 > 0 and tan 0 < 0, what quadrant contains the terminal side of 0.
*May 14, 2011*

**Math**

The Great Pyramid of Giza has a square base with side length of 755 ft. and an original height of 481 ft. Determine its original surface area to the nearest square foot.
*March 31, 2011*

**Physics**

what is the formula used to find time with an Vo at 0, Vf at 22 m/s2, and a constant velocity at 1.7 m/s2?
*March 21, 2011*

**Algebra Please Help**

I have been out of school for a long time and not understanding these questions. Please help why is 5^0=1 can you explain when (-3)^n is positive and when it is negative.
*March 15, 2011*

**com155**

Did the recommendation change the way you previously thought about buying vs. leasing a car?
*March 6, 2011*

**Chemistry**

Really? This is your equation for part A? **Please do not use this or it will be wrong..
*February 28, 2011*

**pre-algebra-is my answer right**

5(2/5)-5/6=
*February 9, 2011*

**computer science**

What is an assembly language
*January 17, 2011*

**Calculus**

A baseball player hits a line drive to center field. He runs from second to third at 20 feet/sec. How fast is the distance from the runner to home plate changing when he is halfway to third base?
*December 30, 2010*

**Physics**

A 0.20-kg block rests on a frictionless level surface and is attached to a horizontally aligned spring with a spring constant of 40 N/m. The block is initially displaced 4.0 cm from the equilibrium point and then released to set up a simple harmonic motion. What is the speed ...
*December 20, 2010*

**Physics**

Thank You
*December 20, 2010*

**Physics**

The answer is 2450 J/K but I can't figure out how to get that.
*December 20, 2010*

**Physics**

The c with the line through it is a degree symbol, and the e is a ^ symble. I am sorry the computer put it in that way.
*December 20, 2010*

**Physics**

A 2.00-kg block of ice is at STP (0¢XC, 1 atm) while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34 „e 105 J/kg)
*December 20, 2010*

**American History**

1. True 2.b. 3.d. 4.a. 5.a.
*December 18, 2010*

**American History**

1.Did William Garrison and John Brown promote the same cause? true or false 2.The two most decisive battles of the Revolution were a. Trenton & Sarotoga b. Sarotoga and Yorktown c.Yorktown & Fallen Timbers d. Yorktown & Long Island 3.All of the following colonies were founded ...
*December 18, 2010*

**Chemistry**

-6.25
*December 7, 2010*

**Statistics**

Statistical Techniques in Business and Economics 15 edition three years after this post STILL has all the answers wrong for this section. 19. Correct answer is 97 21 correct answer is 196 23 correct answer is 554 25. E=.04,Z=1.96,p=.6, find N. N=576.24=577(round up)
*December 2, 2010*

**chem**

Calculate the number of moles of the indicated ion present in each of the following solutions. Na+ ion in 1.20 L of 0.183 M Na2SO4 solution = ?mol
*December 1, 2010*

**calculus**

find the first derivative of y=cos(/9t+11
*November 13, 2010*

**Math**

find the the 2nd derivative and set equal to zero in order to find inflection points of the function f(x)=1/(5x^2+4)
*October 29, 2010*

**math**

It is grater than 7 tens and less than 8 tens. The number has 4 ones
*October 12, 2010*

**algebra**

Use the distributive property to write an equivalent variable expression. -5(4j-1)
*October 12, 2010*

**chemistry**

how much energy is required to heat 1.00L of water from 20degrees celcius to 90degress celcius
*September 29, 2010*

**math**

adam frog can jump 4 times as far as sonya frog. sonya frog can jump 8 inches. use a picture and a number sentence to tell how many inches adam frog can jump
*September 22, 2010*

**math**

selecting three (3) coins, but assume that there are 5 dimes, 4 nickels, and 2 quarters. In how many possible ways can the selection be made so that the value of the coins is at least 25 cents?
*September 15, 2010*

**chemistry **

What is the freezing pint of 0.0091 m aqueous sodium phosphate, Na3PO4? Assume that sodium phosphate is a strong electrolyte and it functions ideally in solution. (express your answer in degrees Celsius)
*September 14, 2010*

**English**

Dangling modifiers - are these right? Second entry is my corrected version. 1. In 1883, massive destruction was caused by the eruption of the volcano Krakatoa, an event recently examined in the book Krakatoa: The Day the World Exploded. In 1883, the eruption of the volcano ...
*September 4, 2010*

**Statistics**

VW Golf: $250 Saab: $300 Mercedes $4200 Jaguar $300 Expected profit for 500 customers: $2,545,000
*July 27, 2010*

**hardware**

What is the maximum frequency output for a square wave from the HP 33120A Waveform Generator? I found the HP 33120A Waveform Generator on the Agilent website but I'm not sure how to figure out the problem.
*July 10, 2010*

**CJS230- Corrections**

I looked over the website you provided, and it gives some of what I am looking for, but still not all. My instructor has not provided me anything else to go on so Im kind of on my own here. Thank you for the website link though. Any other help would greatly be appreciated.
*June 4, 2010*

**CJS230- Corrections**

Final Project: A World Apart Germany and America · Resources: Appendix A and Corrections: The Fundamentals · Select a country outside of the United States and research its correctional system. · Write a 1,050- to 1,400-word paper in APA format comparing ...
*June 4, 2010*

**history**

The task of economic policy is to create a prosperous America. The unfinished task of prosperous Americans is to build a Great Society. Our accomplishments have been many; these tasks remain unfinished: > to achieve full employment without inflation; > to restore ...
*June 2, 2010*

**Vectors**

If vector a and b are unit vectors, and |a+b|= root3, determine (2a-5b) dot product(b+3a)
*May 19, 2010*

**Math**

an saw
*May 6, 2010*

**computers**

I have just started a basic class in programming and I am totally lost. Can someone help me out? I have to write pseudocodes and create flowchart and don't have a clue. I need help with the following: flowchart, pseudo-code, Input and Output variables, and also an Program ...
*April 30, 2010*

**Ap Chemistry **

What exactly is this question telling me to do? Write the balanced chemical equation for the dissociation of Cu(OH)2(s) in aqueous solution.
*April 29, 2010*

**Managerial Econ**

Chevrolet just announced a new incentive program that provides either $5,000 cash back or zero percent financing for up to seven years on Chevrolet Silverado pick-ups. How do you think the bottom line of Heartland Chevrolet in Liberty, MO will be impacted by this offer in the ...
*April 18, 2010*

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