# Posts by Jenn

Total # Posts: 327

**Mathematics**

yeah, its 9.6

**Science**

I have a science question that I don't quite understand. Would you have to to have physical contact to exert a force? Not necessarily. Could we blow very hard and exert a force on something? When I was a kid I liked to make paper pin wheels and blow on them to see the pin ...

**econo**

. John has a paper route and spends all his weekly allowance on hamburgers and pop. The price of a hamburger is $2 and the price of a pop is $1. every week John buys 20 hamburgers and 10 pop. If the price of a hamburger rises to $4 (because of a ban on beef imports) and the ...

**Math**

A governor would like to find out how people in his state feel about state subsidized public art. How might a cluster sample be selected? I searched Google under the key words "cluster sampling" to get these possible sources: http://en.wikipedia.org/wiki/...

**AP CHEM**

I would really appreciate some help on this problem. =) At 218 C, Kc = .00012 for the equilibrium NH4HS(s)<==> NH3(g)+ H2S(g) Calculate the equilibrium concentrations of NH3 and H2S if a sample solid NH4HS is placed in a closed vessel and decomposes until equilibrium is ...

**to bobpursley**

An emergency breathing apparatus often placed in mines works via the following chemical reaction: 4KO2(s) + 2CO2(g) to make 2K2CO3(s) + O2(g) If the oxygen supply becomes limited or if the air becomes poisoned, a worker can use the apparatus to breath while exiting the mine. ...

**chem question i need help**

I need help on this question. Could someone give me tips on how to solve it? thanks An emergency breathing apparatus often placed in mines works via the following chemical reaction: 4KO2(s) + 2CO2(g) to make 2K2CO3(s) + O2(g) If the oxygen supply becomes limited or if the air ...

**chem**

which of the following is a chemical reaction? A) propane forms a flame and emits heat as it burns. B) Acetone feels cold as it evaporates from the skin. C) Bubbling is observed when potassium carbonate and hydrochloric acid solutions are mixed. D) Heat is felt when a warm ...

**American History:Antebellum Reforms**

What force or ideas motivate and inspire the effort to remake and reform American society during the anti-bellum years? Maybe some help here: http://en.wikipedia.org/wiki/Antebellum

**Chemistry**

Compounds like CCL2F2 are known as chloroflourocarbons, or CFCs. These compounds were once widely used as refrigerants but are now being replaced by compounds that are believed to be less harmful to the environment. The heat of vaporization of CCl2F2 is 289J/g. What mass of ...

**History**

For HW we have to do test corrections on our practice exam, so if any of you know the answers to these I'd appreciate it. =] 1. English Puritanism developed during the reign of Elizabeth I .. A) in reaction to the failure of the Elizabethan Religious Settlement to the ...

**AP euro help**

For HW we have to do test corrections on our practice exam, so if any of you know the answers to these I'd appreciate it. =] (I’ve eliminated the choice that was marked wrong for each) 1. English Puritanism developed during the reign of Elizabeth I .. A) in reaction ...

**Gases - van der waals**

It turns out that the van der Waals constant b equals four times the total volume actually occupied by the molecules of a mole of gas. Using this figure, calculate the fraction of volume in a container actually ocupied by Ar atoms (a) at STP, (b) at 100 atm pressure and 0 ...

**american hist**

why did the framers begin the constitution with "we the people..."? http://en.wikipedia.org/wiki/Democracy

**american hist**

-how were the federalists able to win ratification of the constitution? http://en.wikipedia.org/wiki/Federalist_Papers http://en.wikipedia.org/wiki/History_of_the_United_States_Constitution http://www.answers.com/topic/ratification-of-the-constitution

**chemistry**

"Newton's law tells us that Force= Mass x Acceleration. We also know that Energy = Force x Distance and Pressure= Force/Area. Using these relationships and table I-1 [I'll type it out], derive (do math stuff) the dimensions of newtons, joules, and pascals in terms...

**chemistry**

"Newton's law tells us that Force= Mass x Acceleration. We also know that Energy = Force x Distance and Pressure= Force/Area. Using these relationships and table I-1 [I'll type it out], derive (do math stuff) the dimensions of newtons, joules, and pascals in terms...

**orientalism of muslim and arab american**

I can't believe all the student over the years with the same questions from UOP. I am a student there as well. I am having a hard time with this assignment as well. I believe the assignment was created after 9/11 and has never been updated because there is nothing new on ...

**brain teaser help**

what does 50 = L with a W.N. mean?

**algebra anyone**

How to you compute the intercepts of a quadratic function? For the x-intercept, set x to 0. For the y-intercept(s) (if any), set y to 0.

**algebra**

: In case of a quadratic function, why are there two x-intercepts and one y-intercept? Let's say x^2 = y, which is a quadratic function. For every value of y, there are two possibilities for x. For example, if y is 4, x can either be 2 or -2.

**algebra**

Why are there two solutions in the quadratic equation and Why do you factor a quadratic equation before you solve it

**help!!!!!!!!!!**

When factoring a trinomial, why is it necessary to write the trinomials in four terms?" You keep posting this without any thinking. Can this be factored in four terms? 10x^5 + 2x + 17 Perhaps you are meaning factoring the "quadratic" (a polynomial of degree 2) ...

**math**

When factoring a trinomial, why is it necessary to write the trinomials in four terms

**math**

When simplifying a rational fraction, why do you need to factor the numerator and the denominator? Include two examples! I will be happy to critique your thinking on this. I wouldn't ask if I knew how to guess

**MORE MATH**

What is the factoring by grouping? When factoring a trinomial, why is it necessary to write the trinomials in four terms? I will be happy to critique your thinking on this. I do not understand to even answer it? (Broken Link Removed) (Broken Link Removed) How do we determine ...

**math**

When simplifying a rational fraction, why do you need to factor the numerator and the denominator? Include two examples! to get like terms Can you explain a little more? When you factor then you can cancel like terms Example: 12/3 (3)(4) ------- = 4/1 =4 3 i need to ask you a ...