Tuesday

March 3, 2015

March 3, 2015

Total # Posts: 978

**physics**

38 Joules dude
*November 30, 2009*

**9th grade**

Mr. Mist’s ramp broke so he tried to lift the his 150 Newton box of ungraded papers with a pulley system. Mr. Mist had to pull the rope in his system 3 meters. The papers were lifted into his car by the pulley system which lifted the box 1.5 meters, while Mr. Mist only ...
*November 14, 2009*

**Trig**

How do you do this problem? 1+i(square root of 3)
*November 12, 2009*

**phisics**

To keep the cylinder in equilibrium both side must be equal. (m1)*(v^2/r)=(m2)*g Left side=Right side (v^2/r) = (m2)*g / m1 isolate “v” on the left… v^2 = (m12)*g*r/m1 v = sqrt((m2)*g*r /(m1)) plug in the values and you are done… v = sqrt(2.5*9.81*.2)/(1.5...
*November 5, 2009*

**physics**

A ball of mass 0.35 kg is fired with velocity 157 m/s into the barrel of a spring gun of mass 1.8 kg initially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring. No energy is lost to friction. What fraction of ...
*November 1, 2009*

**physics**

thanks
*October 31, 2009*

**physics**

A 80- kg ice hockey player standing on a frictionless sheet of ice throws a 6.2- kg bowling ball horizontally with a speed of 2.1 m/s. With what speed does the hockey player recoil?
*October 31, 2009*

**us history**

In 1754,which country claimed the least amount of land in North America
*October 26, 2009*

**FINANCE**

Tim recently invested $3,500 in a project that is promising to return 10.75 percent per year. The cash flows are expected to be as follows: End of Cash Year Flow 1 $750 2 800 3 ??? 4 950 Note that the 3rd year cash flow is unknown. Assuming the present value of this cash flow ...
*October 22, 2009*

**Statistics**

In hypothesis testing, if a claim statement is asking to test a percentage, your graph is a T or Z line?
*October 21, 2009*

**Statistics**

In hypothesis testing, if the population standard deviation is KNOWN, your graph should be labeled a T or Z line? In hypothesis testing, if the population standard deviation is NOT KNOWN, your graph should be labeled a T or Z line?
*October 21, 2009*

**math**

im learnin about y=mx+b 1.describe the line you think each equation represent Y=x, y=5, x=-3 2. The equation of a line is y=mx+2. determione the value of m when the line passes through each pint D(12.5) s(1.-3) e(-2.6) a(-5.1)
*October 17, 2009*

**Chemistry**

A student finds a medallion which could be made of pure platinium or silver. IN order to find out what the medallion is made of the student takes the medallion to a chemistry lab. The student measures the density of the medallion as follows. The medallion is placed on a ...
*October 12, 2009*

**chemistry**

A rectangular metal bar has a volume of 50.0 inches cubed.The Metal BaR weighs 1.42kg. Calculate the density of the metal in grams per cubic centimeter.
*October 12, 2009*

**math**

Brian O'Reilly earns twice as much each week as a tutor than he does pumping gas. His total weekly wages are $150 more than that of his younger sister. She earns one quarter as much as Brian does as a tutor. How much does Brian earn as a tutor?
*October 11, 2009*

**Biology**

What's the difference between LB "-" and LB "+"?
*October 9, 2009*

**Chemistry**

If 7.83 g FeCl3(s) is dissolved in enough water to make 2.50 L of solution, what is the concentration of Fe3+ in the solution?
*October 9, 2009*

**physics**

A highway curve with a radius of 430 m is banked properly for a car traveling 115 km/h. If a 1550- kg Porshe 928S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid?
*October 7, 2009*

**6th grade math**

how would you say .3481 in words?
*September 29, 2009*

**math**

write the six-digit number that has the digit in the thousand's place, with the remaining digits being
*September 20, 2009*

**11th grade**

1.71 cause of Sig Figs
*September 9, 2009*

**Finance**

Jenning inc. paid out total dividends equal to $ 11,124,200 in 2008. If Jennings reported Retained earnings of $320,868,600 for 2007 and retained earnings of $350,290,100 for 2008, what was Jennings reported net income in 2008?
*August 27, 2009*

**math (tree diagram)**

yo dudes hit me up on aim my screename is lilkevyy45
*August 9, 2009*

**math (tree diagram)**

heyy
*August 9, 2009*

**chemistry**

does changes in solubility between solute and solvent, just mean that the rate at which solute co2(gas) is dissolved by solvent to form co2(aq) is = to rate at which c02(aq) gains eenrgy from collitions to leave dissolved state or what? I need siome clarity.
*August 6, 2009*

**chemistry**

carbon dioxide collide with the liquid solvent and enters its dissolved states? so what does this have to do with solubility equillibrium.
*August 6, 2009*

**chemistry**

Equillibrium, an example given by my textbook confused me. First it shows a reaction inside a soft drink: co2(g)--><--co2(aq) but than it says the reaction inside a soft drink would involve solubility equillibrium because it involves a change in solubility between ...
*August 6, 2009*

**Chemistry**

I meant endothermic not endergonic sorry.
*August 3, 2009*

**Chemistry**

Since decomposition is an endergonic reaction. Does this mean it's reverse reaction synthesis is exothermic?
*August 3, 2009*

**chemistry**

6. dilution can also decrease rate of raction because you deacrease concentration?
*July 21, 2009*

**chemistry**

5. addinf water to a equillbrium system will make it more dilute and increase the volume but decrease pressure so system will shift in direction which produces more ions?
*July 21, 2009*

**chemistry**

1.If a container that is 1L has 1 mol of solid NACL , if you add more nacl will the concentration of solid increase? it should? because if you increase it to two mols it will become 2 mol/l right? so in a equillibrium system like nacl(s)--><---na+ + cl- if you increase ...
*July 21, 2009*

**college algebra**

The origin is (0,0) Both the x and y intercepts at the origin are always 0.
*July 3, 2009*

**social studies**

I agree that people should be able to help themseleves. To have a successful life you must have the mindset of a winner. To be a winner you must have three things self-confidence, determantion, and an high education.
*July 1, 2009*

**social studies**

People should be able to help themselves. If they want to make their life better they need to be motivated and should find a way to make it happen. Equal opportunity for all. You just have to work for it. If a person is in a low paying job that is probably all they really want...
*July 1, 2009*

**6grade english**

Give them fish they will eat for a day. Teach them to fish they will eat for years. With regard to low income countries and based on your knowledge and understanding of culture, society and social stratification provide support for or criticism of this statement.
*July 1, 2009*

**math**

hy,i have trouble doing (x+1) with an exponent 3 on top of the parentheses and (x+1) with an exponent 4 on top of the parentheses thank you
*June 30, 2009*

**6th grade english**

I totally agree with the statement. Everyday people around the world is trying to make life better in some kind of way. I think showing these people new skills and ways they can benefit from it, people would be more excited to learn new things everyday. I think it would be ...
*June 30, 2009*

**6th grade english**

Give them fish they will eat for a day. Teach them to fish they will eat for years. With regard to low income countries and based on your knowledge and understanding of culture, society and social stratification provide support for or criticism of this statement.
*June 30, 2009*

**6th grade english**

Give them fish they will eat for a day. Teach them to fish they will eat for years.
*June 30, 2009*

**Chemistry**

So would it be rate = (10^-7)*(10^-7)*(1.4X10^11)
*May 19, 2009*

**Chemistry**

A reaction is said to be diffusion controlled when it occurs as fast as the reactants diffuse through the solution. The following is an example of a diffusion controlled reaction. The rate constant for this reaction is 1.4x1011 M-1s-1 at 25oC and the reaction obeys the ...
*May 19, 2009*

**calculus**

integrate log base 10 x / x dx i dont understand this
*March 19, 2009*

**CALCULUS HELP!!!**

integrate 1/(x^2sqrt(1+x^2)) i know you have to use trig sub but iono how to cancel out some terms...much help is appreciated
*March 19, 2009*

**3rd grade**

kevin has $11.00 he gave terrell ave $3.00 and devin $2.00 about what fraction of his money does he have left about 1/4 about 1/3 about 1/2 about 2/3
*March 4, 2009*

**3rd grade**

kevin has $11.00 he gave terrell ave $3.00 and devin $2.00 about what fraction of his money does he have left
*March 3, 2009*

**math**

kevin has $11.00 he gave terrell ave $3.00 and devin $2.00 about what fraction of his money does he have left
*March 3, 2009*

**algebra**

I am coming up with (-5,-2,4) for my answer and I see you x=5
*February 26, 2009*

**algebra**

solve system of equation 5x+2y+z=-25 5x-3y-z=-23 3x+y+2z=-9
*February 26, 2009*

**algebra**

Did I do this problem right? (2y+5w+6)(5y+5w-4) 2y(5y)+ 2y(5w) + 2y(-4) + 5w(5y) + 5w(5w)+ 5w(-4) + 6(5y) + 6(5w) + 6(-4) then I multiplied: 10y^2 + 10wy - 8y + 25wy + 25w^2 - 20w + 30y + 30w - 24 then I combined like terms: 10y^2 + 15wy + 25w^2 + 22y + 10w - 24 final answer: ...
*February 16, 2009*

**algebra**

ok I finished the problem. Is this right? 2y(5y)+ 2y(5w) + 2y(-4) + 5w(5y) + 5w(5w)+ 5w(-4) + 6(5y) + 6(5w) + 6(-4) then I multiplied: 10y^2 + 10wy - 8y + 25wy + 25w^2 - 20w + 30y + 30w - 24 then I combined like terms: 10y^2 + 15wy + 25w^2 + 22y + 10w - 24 final answer: 10y^2...
*February 16, 2009*

**algebra**

I don't even know where to begin with this problem. multiply (2y+5w+6)(5y+5w-4)
*February 16, 2009*

**chemistry**

Ca(ClO3)2 + KCl --> CaCl2 + 3O2 + KCl Mass of test tube = 7.918g Mass of KCl/Ca(ClO3)2 mixture + tube = 19.164g Mass of KCl/CaCl2 residue + tube = 18.635g What is the weight % of Ca from the Ca(ClO3)2 impurity in the original mixture?
*February 11, 2009*

**Math**

The directions say to use a grapking utility to approximate (to two-decimal-place accuracy) any relative minimum or maximum values of the function: y=x^3 - 6x^2 + 15 Can someone please help me because my graphing calculator is not working!!!
*February 8, 2009*

**analogies**

man its hard
*February 4, 2009*

**CHEMISTRY URGENT PLZ HELP**

thanks damon
*January 18, 2009*

**CHEMISTRY URGENT PLZ HELP**

uh i dont think thats how u do it because i think you need to add and remove electrons from two separate reactions first before multiplying it out...but thank you anyway
*January 18, 2009*

**CHEMISTRY URGENT PLZ HELP**

First of all I am not the same person as before...his name was Max, my name is Kevin so i do not know that you answer this question before. Secondly, I do not know what you mean about about loss of 2 electrons, how would i use hydrogen to balance the charges when I have: SO3(2...
*January 18, 2009*

**CHEMISTRY URGENT PLZ HELP**

Write a balanced equation for the following reduction-oxidation reaction. SO3(2-) + MnO4(-) --- SO4(2–) + Mn(2+) can someone help me step by step??
*January 18, 2009*

**CHEMISTRY**

Write a balanced equation for the following reduction-oxidation reaction. SO3(2-) + MnO4(-) --- SO4(2–) + Mn(2+) can someone help me step by step??
*January 18, 2009*

**English lit.>Grendel**

Having trouble understanding the book Grendel...is there a site you know of that may help? Thank you, Kevin
*January 15, 2009*

**physics**

An object starts from rest and accelerates uniformly down an incline. If the object reaches a speed of 40 m/s in 5 seconds, what is its average speed?
*January 2, 2009*

**college algebra**

That's very cool! Thank you for your time!
*December 9, 2008*

**college algebra**

Find the sum of the first 500 positive integers. thanks for any help!
*December 9, 2008*

**college algebra**

find the general term of the following sequence 1/3, 3/5, 5/7, 7/9, ... thanks for any help!
*December 9, 2008*

**math**

find the general term of the following sequence 1/3, 3/5, 5/7, 7/9, ... thanks for any help!
*December 9, 2008*

**s.s**

i think that several states ratified the Constitution only after they were promised that a bill will protecting individual rights would be added to it. Many Antifederalists did not think that the Constitution would protect personal freedoms.
*December 3, 2008*

**s.s**

Why did Congress add the Bill of rights?
*December 3, 2008*

**s.s**

What was the main argument of the Antifederalists against the Constitution?
*December 3, 2008*

**Thermochemistry**

So q=mc(Tf-Ti) could be written as Delta H=mc(Tf-Ti) assuming the pressure is constant?
*December 2, 2008*

**Thermochemistry**

I'm confused about the difference between the q in q=mc(Tf-Ti) and (Delta)H, or enthalpy. What exactly does enthalpy mean and how is that different than q? (I'm also confused about what Gibbs Free Energy actually means; I know that if it's negative, the reaction is...
*December 2, 2008*

**CHEM**

NH3 is a base because it accepts a proton from H2O.
*November 20, 2008*

**S.S**

What impact did the Virginia Statute for religious freedom have on the U.S government?
*November 9, 2008*

**Biology**

What portion of the brain is responsible for voso motor control?
*October 28, 2008*

**Science**

A little aluminum boat (mass of 14.50g) has a volume of 450.00cm3. The boat is placed in a small pool of water and carefully filled with pennies. If each penny has a mass of 2.50g, how many pennies can be added to the boat before it sinks?
*October 16, 2008*

**Social Studies**

Why did the British army march on Lexington and Concord
*October 13, 2008*

**Physics**

A bird watcher meanders through the woods, walking 0.35 km due east, 0.65 km due south, and 2.05 km in a direction 31.0° north of west. The time required for this trip is 3.50 h. Determine the magnitude and direction (relative to due west) of the bird watcher's. Find ...
*October 11, 2008*

**4th grade science**

it does boil at 100c I have tred it with a science project in fourt grade
*September 30, 2008*

**science**

Describe the biological interrelationships among the life forms in inda
*September 23, 2008*

**Mathematics**

3x-3y=12 3x+2y=-3 2x+y=4 Solve each by reduced row echelon form and if no solution, say it is inconsistent.
*September 23, 2008*

**Mathematics**

Carletta has $10,000 to invest. As her financial consultant you recommend that she invest in Treasury Bills that yield 6%, Treasury Bonds that yield 7%, and coroporate bonds that yield 8%. Carletta wants to have an annual income of $680, and the amount invested in corporate ...
*September 23, 2008*

**math**

The first thing that you to is distribute the -5 to both the terms in parenthesese. So you get -10W-5=25. than you add five to both sides and get -10w=30. The last thing you do is divide both sides by -10. w=-3.
*September 23, 2008*

**Mathematics**

At Harlan County Damn in Nebraska, the U.S. Bureau reports that the storage content of the reservoir decreased from 117,811 acre-feet (38.4 billon gallons of water) on Septmber 6, 2006 to 115,579 acre-feet (37.7 billion gallons of water) on October 6, 2006. Suppose that the ...
*September 8, 2008*

**social studies**

unscramble idmieeflt to make two words
*September 5, 2008*

**social studies**

unscramble arfzunrdon two words
*August 30, 2008*

**Calc**

This is a piecewise function on one graph: f(x)= 3, -4 <or= x <or= 1 -x+2, 1 < x < 3 x-5, 3 <or= x <or= 7 The coordinates are (-4,3) (-1,3) (3,-1) (3,-2) (7,2) So what would the graph look like if it is:y= abs(f(x)), y=2f(abs(x)), y=f(-x), y=-f(x)-3, y=f(x+3...
*August 18, 2008*

**chem**

I tried C and it marked it wrong
*August 8, 2008*

**Economics**

What is the connection between profit maximization and "fair" prices Are all profit maximization prices fair
*July 23, 2008*

**Economics**

What happens to the marginal utility per dollar of shoes if the priece of shoes goes up, and how should consumers respond to this to maximize utility
*July 23, 2008*

**Economics**

What is more important to the consumer: Marginal utility or marginal utility per dollar and why
*July 23, 2008*

**social studies**

unscramble the following to make two words arfzurdon
*June 21, 2008*

**social studies**

unscramble the following to make two words rveessevssur
*June 21, 2008*

**social studies**

what Canadian capital did U.S troops burn down in 1813
*June 17, 2008*

**math**

1/5 is 40 pages so 40x5=240 so there are 240 pages in the book
*May 24, 2008*

**math**

Hannah had dinner at her favorite restaurant. If the sales rate is 4% and the sales tax on the meal came to $1.25, what was the total cost of the meal, including sales tax and a 20% tip?
*April 26, 2008*

**math**

A school has 6th, 7th and 8th period Social Studies classes. One student from each class will be chosen to represent the school in an essay contest. The 6th period finalists are Mike, Sara, Luis and Ed. The 7th period finalists are Ben, Eric, and Sandy. The 8th period ...
*April 26, 2008*

**math**

There are 8 singers competing at a talent show. In how many different orders can the singer appear?
*April 26, 2008*

**u.s.history**

Why did the soviet union feel that it was necessary to place nuclear missile in cuba? In what Asian country did the u.s. place nuclear weapons that could fire on western Russia? What waas the significance of the u-2 flight? Why did Kennedy issue a quarantine instead of a ...
*April 8, 2008*

**u.s.history**

What is the significance of 13 days
*April 8, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

How does a tree feel after a hard day at work?
*April 6, 2008*

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