Friday

February 5, 2016
Total # Posts: 2,417

**Physics**

Jessica's weight is 540 newtons. According to the Third Law, if the Earth pulls on Jessica with a force of 540 N, then Jessica pulls on the Earth with a force of 540 newtons that acts in the opposite direction. However, if Jessica stumbles while rollerblading, she will ...
*March 15, 2009*

**discrete math**

what is the link between matricies and graph theory
*March 14, 2009*

**Parametric curves and area**

1.The curve of x=49-t^2 and y=t^3-1*t makes a loop which lies along the x-axis. What is the total area inside the loop? 2.Find the area of the region enclosed by the parametric equation: x=t^3-7*t and y=4*t^2.
*March 10, 2009*

**Calculus-Modeling Equations**

An unknown radioactive element decays into non-radioactive substances. In 420 days the radioactivity of a sample decreases by 39 percent. 1.What is the half-life of the element? 2.How long will it take for a sample of 100 mg to decay to 46 mg?
*March 6, 2009*

**Chemistry**

How many moles of KMn)4 are required to reach with the moles of Na2C2O4 in the last problem? and also, if the KmnO4 of the last problem is in 30.30mL of solution what is the molarity (M) of the KmnO4 solution?
*March 3, 2009*

**Chemistry**

how many moles of Na2C2O4 are there in 25.00 mL of a .7654 M solution of sodium oxalate?
*March 3, 2009*

**Chemistry**

thank you. so what did you get as a final answer for this problem then? and what did u do after doing 2.2=2PHN3 and after subsituting the partial pressure?? Thanks
*March 2, 2009*

**Chemistry**

How do you solve this: Consider the decomposition of ammonium chloride at a cerain temperature NH4Cl(s) <- NH3(g) + HCl(g) -> Calculate the equilibrium constant Kp if the total pressure is 2.2 atm at that temperature.
*March 2, 2009*

**geometry**

how do you do linear measure and precision
*February 26, 2009*

**4th grade english**

Earlier this year, our class ______ a greenhouse. (visit) Would the correct form be has visited
*February 22, 2009*

**Accounting**

Hello, I am taking an accounting class and the questions states "post to the accounts and keep a running bakance for each account" the question gives a page number to refer to but it does not provide any guidance. What does these means?? Thanks
*February 22, 2009*

**Math**

Determine whether the function is one-to-one. If it is, find itd inverse. f(x)= 3x+4 over 5
*February 19, 2009*

**Math**

Use a graphing utility to approximate (to two-decimal-place accuracy) any relative minimum or maximum values of the function. y=x^3 - 6x^2 + 15 My answer was (4,12) for min and(0,-12) for max.
*February 18, 2009*

**Math**

5x-6(-5x + 2) = 16
*February 18, 2009*

**mechanics**

An object has a mass of 120 kg on the moon. What is the force of gravity acting on the object on the moon?
*February 5, 2009*

**Algebra**

input =9 output = 2 what is the function. input = 27 output = 8 what is the function. input = 42 output = 13 what is the function input = 3 output = 0 what is the function.
*February 1, 2009*

**Algebra**

input function output 9
*February 1, 2009*

**Algebra**

Can someone help me with this one? Find all numbers for which the rational expression is undefined. 6/4w+5 Thanks
*February 1, 2009*

**6th grade_Science/Math**

Thank you Francis! I didn't get it. :)
*January 27, 2009*

**Is this imagery?**

Is this a metaphor or imagery? "The ground is wet, and smells of smoke; it feels soft and spongy to his touch."
*January 27, 2009*

**Is this imagery?**

He hooks an arm around his son's neck and is at once caught in a fierce embrace. He smooths the dark head wedged against his shoulder, brushes the hair aside at the back of his neck to touch bare skin.
*January 27, 2009*

**Algerbra**

Thank you for your help, it is width. So i take the 2and times it by the 27. With that answer figure out the difference between the 2 times 27 and minus from 100 then divid by 2. Is this the way to figure out the problem?
*January 25, 2009*

**Algerbra**

Can anyone help me on these two problems also. I am getting so confused and tired. The length of a rectangle is fixed at 27cm. What lengths will make the perimeter greater than 100cm? also this problem Trians A and B are traveling in the same direction on parellel tracks. ...
*January 25, 2009*

**Algerbra**

I have a couple of problems that i am stuck on. They are word problem. 1 Soybean meal is 12% protien; cornmeal is 6% protien. How many pounds of each should be mixed together on order tyo get 280 pounds of mixture that is 11% protien? How many pounds of the cornmeal should be ...
*January 25, 2009*

**math**

Mr. Cline needs 36 ice cubes for the science experiment. Eack ice tray makes 12 ice cubes. If he makes 4 ice trays, does he have enough ice cubes? Can you use an estimate to solve? Explain.
*January 21, 2009*

**College math**

A planehas 7 hrs. to reach a target and come back to base. it flies out to the target at 480 miles per hr. and returns on the same route at 640 miles per hour. how many miles from the base is the target?
*January 20, 2009*

**8th Grade Algebra: Answer Check #2**

can u hlep me
*January 20, 2009*

**8th Grade Algebra: Answer Check #2**

y=x2+-24
*January 20, 2009*

**Algerbra**

One day a store sold 35 sweatshirts. White ones cost $9.95 and yellow cost $12.50. In all, $389.05 worth of sweatshirts were sold. How many of each color were sold? How many white sweatshirt were sold? How many yellow sweatshirt were sold? I can not figure out how to do this ...
*January 16, 2009*

**Algebra**

The base of a triangle is 8cm greater than the height. The area is 42cm^2. Find the height and length of the base.
*January 14, 2009*

**4th grade**

what volume of helium would be in a balloon the size of a 2liter soft drink?
*January 11, 2009*

**spelling**

thro?
*January 7, 2009*

**Math**

josh that is the right answer by kimberly and I think you go to my school write back josh
*January 6, 2009*

**Math**

math is kinded of hard for me but I try my best in math and please solve my math problem and see if its right sinccer kim and 1 think can you spell sinccer please thank you very much anybody and sue
*January 6, 2009*

**Math**

5*5*5*5*5<40 than you do 5*14<70+4<74 5^2< 7
*January 6, 2009*

**math**

livly tempo kimberly
*January 6, 2009*

**healthcare**

what ethical issues might arise by relying more and more on technology in Health Care or Human Service? As you answer,consider ethical issues from a consumer’s perspective and from a Health Care or Human Service worker’s perspective.
*January 6, 2009*

**physics**

drwls is correct, except change everything labeled in FEET to METERS since the original problem is in meters.
*January 4, 2009*

**public health**

Review this artile: Hutt, J. & Wallis, LA. (2004). Injuries caused by airbags: a review. Trauma, 6, 271-278 and answer following: How did the researchers use the literature to explain a public health phenomena? How was the literature used to show the necessity for the research...
*December 25, 2008*

**adult education**

Review this artile Hutt, J. & Wallis, LA. (2004). Injuries caused by airbags: a review. Trauma, 6, 271-278 and answer. • How did the researchers use the literature to explain a public health phenomena? • How was the literature used to show the necessity for the ...
*December 25, 2008*

**Math**

let f(x)= x+3/x-11 and let the domain of the function be the set of all intergres except 11. Find the function values f(9)=
*December 12, 2008*

**Math**

Write the first five terms of the sequence whose nth term is -7n-4.
*December 12, 2008*

**MATH FOR TEACHERS**

Would you please explain further I am lost?
*December 11, 2008*

**MATH FOR TEACHERS**

Write 75.42 in fractional notation.
*December 11, 2008*

**chem**

For a given quantum number, n, which electrons will experience the greatest Z*, s or p??????
*December 10, 2008*

**chemistry**

what is the effect of electrons in a penetrating orbital on Z* (the effective nuclear charge) felt by electrons in a second orbital?
*December 10, 2008*

**PHYSICS**

1. A 4.0 N force acts for 3 seconds on an object. The force suddenly increases to 15 N and acts for one more second. What impulse was imparted by these forces to the object? 2. A railroad freight car, mass 15,000 kg, is allowed to coast along a level track at a speed of 2 m/s...
*December 4, 2008*

**PHYSICS**

could you expand on 3 and 4 please?
*December 4, 2008*

**PHYSICS**

1. i got 27 2. i got .46 3.still confused 4. "
*December 4, 2008*

**PHYSICS**

1. A 4.0 N force acts for 3 seconds on an object. The force suddenly increases to 15 N and acts for one more second. What impulse was imparted by these forces to the object? 2. A railroad freight car, mass 15,000 kg, is allowed to coast along a level track at a speed of 2 m/s...
*December 4, 2008*

**physics- PLEASE HELP**

2. A .12 kg ball is moving at 6 m/s when it is hit by a bat, causing it to reverse direction and have a speed of 14 m/s. What is the change in the magnitude of the momentum of the ball? 4. Lonnie pitches a baseball of mass .2 kg. The ball arrives at home plate with a speed of ...
*December 3, 2008*

**Accounting**

Calculate the future value of the following: o $5,000 compounded annually at 6% for 5 years o $5,000 compounded semiannually at 6% for 5 years o $5,000 compounded quarterly at 6% for 5 years o $5,000 compounded annually at 6% for 6 years • Answer the following: What ...
*December 3, 2008*

**language**

the cay takes place during???
*December 3, 2008*

**physics-HELP**

Suppose that you let teh masses m1 and m2 slide (without adding the third mass). a. what is the acceleration of the mass 25g? Hint: Identify the force that produces the motion and the one that opposes and write the equation for the net force. b. what is the change of momentum ...
*December 2, 2008*

**french**

looks right to me, but i only had 3 yrs french, so im not fluent
*December 2, 2008*

**history**

What are the checks on the power of the judiciary? Are they potent and easily invoked or weak and difficult to invoke?
*November 30, 2008*

**government**

Why has the Commerce Clause (Article 1, section 8, Clause 3) been used to target agriculture, transportation, finance, labor relations and the workplace?
*November 29, 2008*

**politic**

Why do those who bear the costs (higher milk prices or taxes to support the maritime industry) not oppose these sorts of policies? Would it be rational to oppose them? Would it be rational to know about them?
*November 28, 2008*

**English 11th grade level**

Whaat was on santiago's small line in old man and the seaa?
*November 25, 2008*

**9th grade**

at 30degrees celcius, 80 grams of potassium bromide is dissolved in 100 grams of water. is this solution unsaturated, saturated, or supersaturated.
*November 24, 2008*

**Algabra**

I forgot to put this in the question i asked. Here it is again. 5/a=?/a 2power Write an equivenlant expression to this.
*November 23, 2008*

**Algabra**

How to solve this: 5/a=?/a to the second power
*November 23, 2008*

**AP World History**

In a DBQ the should the thesis statement include the group part of the essay in it?
*November 20, 2008*

**Math - gr.11**

Hi, can someone help me figure out how to do this question? A 5m stepladder propped against a classroom wall forms an angel of 30 degrees with the wall. Exactly how far is the top of the ladder from the floor? Express your answer in radical form. This chapter right now that we...
*November 20, 2008*

**math**

solve for y (x-3)(x^2+3x+9)=4y^2
*November 16, 2008*

**math**

solve for y (y^2-2y+1)-x=0
*November 16, 2008*

**physics**

a 50 kg person is standing on mercury. mercury's mass is .0553 times the earths mass and has a radius of 2439 kilometers a. what is the persons weight on saturn b. what is the persons mass on saturn how do i solve this, i dont need the answers, just an explanation
*November 14, 2008*

**it**

Explain how you would create the users for the sales organization unit and how to set up work groups in this particular situation. Keep in mind that you may have to name certain applications and allowable tasks for each individual or job role. First MI Last Logon ID Title Dept...
*November 13, 2008*

**physics**

A solid sphere of weight 36.0 N rolls up an incline at an angle of 30.0o. At the bottom of the incline the center of mass of the sphere has a translational speed of 4.90 m s-1. Isphere = 2/5mr^2. What is the kinetic energy of the sphere at the bottom of the incline? How far ...
*November 13, 2008*

**pre cal HELP**

lim (x+x^2)/3x x->0 i need to factor it first then find the limit and the answer is 1/3. I just dont know how to work it out.
*November 12, 2008*

**Chem**

1) A 15.0 g sample of nickel metal is heated to 100.0 C and dropped into 55.0 g of water, initially at 23.0 C. Calculate the final temperature of the nickel and the water, if the specific heat capacity of nickel is 0.444 j / g x C. 2) In a coffee-cup calorimeter, 1.60 g of ...
*November 11, 2008*

**physics**

1. A cart of weight 20 N is accelerated across a level surface at .15 m/s^2. What net force acts on the wagon? (g=9.8m/s^2) 2. An automobile of mass 2000 kg moving at 30 m/s is braked suddenly with a constant braking force of 10000 N. How far does the car travel before ...
*November 11, 2008*

**physics**

nevermind, someone helped me earlier
*November 8, 2008*

**physics**

A block slides down a 10 angled incline at a constant speed. what is the coefficient of sliding friction between the blocks surface and the incline?
*November 8, 2008*

**physics**

thanks!
*November 8, 2008*

**physics**

A 20 kg sled rests on a horizontal surface. if it takes 75 N to start the sled in motion and 60 N to keep it moving at a constant speed, what are the coefficients of static and kinetic friction respectively? explain please
*November 8, 2008*

**sciencce**

a block slides down an angle 10 incline at a constant speed. what is the coefficient of sliding friction between the block's surface and the incline?
*November 8, 2008*

**7th grade pre algebra**

What is The Answer To This Question Below? Evaluate (m-3.2)(m+4.1)when m=-4.1
*November 6, 2008*

**Organic Chemistry**

When benzyl chloride is treated with sodium iodide in acetone, it reacts much faster than 1-chlorobutane, even though both compounds are primarily alkyl chlorides. Explain this rate difference.
*November 2, 2008*

**Organic Chemistry**

Why is benzyl chloride reactive in both tests, whereas bromobenzene is unreactive?
*November 2, 2008*

**Organic Chemistry**

I think the answer to this question might be because bromide ions are better leaving groups than chloride ions. Someone please help clarify for me! Thanks in advance.
*November 2, 2008*

**Organic Chemistry**

In the tests with sodium iodide in acetone and silver nitrate in ethanol, why should 2-bromobutane react faster than 2-chlorobutane?
*November 2, 2008*

**algebra**

Need to solve. The length of a rectangle is fixed at 30cm. What width s will make the perimeter greater than 98cm? The width must be greater than _____ cm.
*November 2, 2008*

**algebra**

need to solve this. The function H described by H(x)=2.75x+71.48 can be used to perdict the hieght, in centimeters, of a woman whose humerus is x cm long. Perdict the hieght of a woman whose humerus is 37cm long. 37cm long is ____ cm.
*November 2, 2008*

**Statistics**

An automobile in surer has found that repair claims have a mean of $1520 and a stardard deviation of $770. Suppose that the next 100 claims can be ragarded as a random sample from the long-run claims process 1. What is the mean and standrd deviation of the average x(bar) of ...
*October 31, 2008*

**Algebra**

Solve. Ten graph. 4 x > 12 -
*October 30, 2008*

**Algebra**

Graph the equation using the slope and the y-intercept y-4/3 x +4
*October 30, 2008*

**Algebra College**

Ok I will get this typed out. 1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that there are two floor plans still available, and there are a total of ...
*October 26, 2008*

**Algebra College**

Thank you for the advice. I will do that.
*October 26, 2008*

**Algebra College**

1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use ...
*October 26, 2008*

**math**

hi i want to see if this works
*October 14, 2008*

**math**

Find all the numbers between 1 and 1000 that have 2 their only prime factor? I can't do it alone some help me!!!!!!!!!!!
*October 14, 2008*

**Social Studies**

what is meaning of motto,or short saying ,on the great seal
*October 7, 2008*

**Language Arts**

swa-swa is an example of a word from ?
*October 2, 2008*

**math**

A pasture has four straight sides. Three sides are 3/8 miles long. It took 1 3/8 miles of fencing to enclose the pasture. What is the length of the fourth side? Using a verbal model write an equation for this situation, where x is the length of the fourth side. Solve the ...
*October 1, 2008*

**graphs**

graphs are so hard so I really need help
*September 28, 2008*

**calculus**

Expand the binomial: y = (x-3)^4
*September 27, 2008*

**calculus**

Factor the given equation: p(x) = x^3 - 25x
*September 27, 2008*

**calculus**

given the functions: f(x) = x^2 - 1, g(x) = x/x + 2 Why is x^2 - 1/x^2 + 1 the equation of (g o f)(x)?
*September 27, 2008*