Tuesday
July 29, 2014

Posts by Jordan


Total # Posts: 759

Chem
DrBob222 is perfectly correct although it does say in the question that the same amount of salt is added at both temperatures. when the snow is at -2 degrees the addition of the NaCl lowers the temperature that the snow melts at to somewhere between -2 and -30 degrees. However...

Need Help!! Algebra
linear is a straight line such as y=ax+b while y=ax^2+bx+c is non linear. a function is defined as each x value giving a unique y value. I'll leave you to take it from here, hope this helped.

physical science explorations
well if F=ma and a=v-u/t (final velocity-initial velocity/time) so combining these two equations we get F=m(v-u/t) which gives us F=mv-mu/t if the car is to stop then obviously the final velocity is zero (now this will give us a negative answer but that is OK because it is a r...

Chem
if something dissociates then that means that it completely dissolves in a solution. so DrBob222 is completely correct as NaCl, MgCl2 and CaCl2 all dissolve. unlike table sugar. check a solubility table if you are ever unsure.

physical science explorations
ok now Force Force = mass*acceleration use the acceleration you calculated in the first question to find the force exerted on the puck

physical science explorations
a=(v-u)/t where v=final velocity, u=initial velocity and t= time in seconds initial is 0 m/s go from here yourself :)

physical science explorations
see the post above

Science
if something works 100% of the time then there would be no errors, human or equipment related

GEOMETRY
always draw a diagram as a visual aid if you are having problems with a question

Math
i think Gina may mean the factors of a number, like the factors of 12 are 1,2,3,4,6,12 one way is to start at the lowest factor and write down its pair, ie: 1*12, then 2*6 then 3*4, when you get to 4*3 you have started to overlap meaning that you have reached the maximum numbe...

Physics
we know that the force the table is exerting on the box must be equal to the force that the box is exerting on the table. in reality the 85N of the box is not the force that is being exerted on the table because the 30N on the other end of the rope is acting against the 85N th...

English
5 is fine except for the last line "That means your are happy?". 'That means you're happy' is a much better sentence.

math
you can of course just do it in one step and take out 6x^4 if you are comfortable enough to do that

math
divide through by 6 first 6(x^6+5x^5+6x^4)=0 take out the lowest common factor x^4 6x^4(x^2+5x+6) then factorise the bracket 6x^4.(x+2)(x+3)

math
i'm not entirely sure what you mean by expanded form for a single number.

Chemistry
when going from seconds to hours, first times by 60 to get to minutes then 60 again for hours, or just multiply by 60*60=360. the most common conversions you will have to do in sciences are from m/s to m/hr and back again. (however km/hr is the more commonly used units) so rem...

AP GOVT
According to John Locke's 'Second Treatise of Civil Government', what is the importance of the constitution?

AP GOVT
Where in the constitution (in the first 3 articles) can you find 'a power that the executive branch has over the judicial branch';'a power that the legislative branch holds over the executive branch'; and 'a power the judicial branch holds over the executiv...

AP GOVT
What documents in American politics have been influenced by John Locke's philosophies? (specific examples)

Math
in saying first spot, i am not implying an order i am saying that there are 3 spots to fill, which there are. they would not be counted twice as you are lowering the number of available people left to fill a spot each time. since there are no repeats once somebody fills a spot...

Math
i in turn respectfully disagree with Reiny. from 8 people there are 3 spots to fill and as correctly stated there is no ordering, this means that for the first spot there are 8 people to choose from, the second there are 7 people left to choose from and the third spot there ar...

Math
an easier way to think about it is that you have 6 ways to choose first place and considering that the same person can not get second place you only have 5 to choose from for second place and of course 4 people to choose from for third place. that makes it 6*5*4 possibilities=...

Math
on a very basic level decimals are just parts of numbers, like fractions of a whole. with each place to the right being 10 times less than what it was previously eg 0.1 is ten times less than 1 and 0.01 is ten times less than 0.1. this also makes 0.01, 100 times less than 1. h...

math
cooking, measuring flower etc, 3/4 cups, cement mixing need the right ratio of water and sand to cement, i'm sure you can think of one more for yourself

Mathematics
ok well maybe changing them to decimals then adding will count as another way

Mathematics
is it 3 * 3/4 + 5 * 1/3? which way have you done?

Math
ok it can sometimes be easier to put in an equation of sorts. 6,279,000,000=2,556,000,000 * x then we multiply x by 100 to get % making x the %increase then just solve for x so 6,279,000,000/2,556,000,000=x x=2.4566 then multiply by 100 =245.66% now this does sound like a lot ...

very easy algebra one
it depends on whether (a t3) is (a*t3) or if it is (a+t3.)if (180s) is one term as well then. your expansions are either for (a*t3)(1) 180s*a*t3 or for (a+t3)(2) (180s*a)+(180s*t3)

Physics
try an equation with mass considering they tell you he weighs 62kg

AP GOVT
what documents in american politics have been influenced by John Locke's philosophies

AP GOVT
thank you!

AP GOVT
The 25th amendment describes the sequence of events that would install the vice president as acting president against the will of the president. Outline that sequence of events.

12th grade
Where in the Constitution is the Electoral College described? (I know there are two parts)

chemistry
great thanks a lot, soz bout double post

chemistry
if equal volumes of solutions having pH6 and pH7 are mixed what is the resulting pH?

chemistry
if equal volumes of pH6 and pH7 are added what is the resulting pH?

math
greatest mean would refer to the highest average life of each light bulb, while the greatest median when looking at a 5 year supply is not as relevant, half your light bulbs would have a lifespan below the median and half would have a life span above. Compare this to all light...

math
20-2=18 18*7=126 126-12=114 114/2=57 you would have 57 cookies

Math
exactly, say it was a 5 sided dice, each side labeled A-E. P is probability, what is the probability of rolling an A OR an E the shorthand notation being P(AorE) the answer should be given as a decimal, 1 meaning that the outcome is certain to happen, 0 meaning there is no cha...

Math
If f(x)=x^2-2 and g(x)=1/(3x) (x does not equal 0), find (f+g)(x) and f(fxg)(-2)

Grammar
which is the complete subject,simple subject The two-and-a-half-month-old child received 2nd degree burns across the bridge of his nose. simple subject is: received 2nd degree burns :complete subject is two-and-a-half-month-old

7th grade
Using the waterways was the easiest way to transport goods in those days, it would also have been quicker than a horse or ox drawn wagon that did not have established roads to go on.

Math
Need help. Multiply using the rule for the square of a binomial (6x^2-4)^2

Spanish
Can someone help me with this please Re-write the following dialogue adding the correct form of “estar” or the gerundio of the verb (other than estar) in parenthesis to form the present progressive form. Jose: Hola María. ¿Qué ___(5)___ (ESTAR t&...

7th grade input/output patterns
I need to see a completed example of input/output patterns at the 7th grade level. Thanks,

7th grade
How much lace edging is needed to go around a circular tablecloth with a diameter of 6 ft?

HELP Physics
A 2 cm object is placed 36 cm from a screen. Where should a converging lens of focal length 8 cm be placed between them to form a clear image on the screen? What two possible magnifications could the image have?

physics HELP
(m)/(1/s) would give you (m)*(s/1)=ms, so it can't be D. (m/1)*(1/s) WOULD give you m/s, though, so the answer must be B.

physics HELP
Hz = 1/s What would you do to 1/s to get m/s?

Algebra
Thank you a million Reiny.

Algebra
Thank you so much you are a god.. can you pleas ehelp me wit h the word problem?

Algebra
in that equation I have to solve for x. 5. x^3 + 2x^2 - 9x = 18 in this word problem i have to solve my factoring. 8. Suppose the altitude of a rising hot-air balloon is given by h = 0.04 t2 + 2t, where “t” is the time in seconds after the balloon leaves the ground. ...

algebra interest word problem
i don't know

algebra interest word problem
its $2166 NOT $166

algebra interest word problem
i don't know how to work it. didn't work out.

algebra interest word problem
Erin Grabish recevied $2,000 for speaking at a financial planning seminar. Erin invested the money in a certificate of deposit for 2 years. When she redeemed the certificate of deposit, she received $2166. What simple interest rate did Erin receive on this certificate of deposit?

algebra interest word problem
THANK YOU!

algebra interest word problem
Steve Marino borrowed $500 from his credit union for 2 years. The simple that he paid was $52.90. What simple interest rate was Jeff charged?

Enm Science
What are the advantages and disadvantages of animal studies and epidemiological studies for establishing dose-response relationships?

5th grade
5-4x4 divided by 7 plus 4 = negative 13 and 2 7ths.....can you insert parentheses to make this a true number sentence?

science
what is a longhorn and what does it look like

science
What is the value of knowing whether your sore throat is caused by a virus or a bacteria?

physics.
Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of th...

physics. Can you check my answer?
I just realized that the answer had to be 10. Im sorry for any confusion. Thank you for your help though.

physics. Can you check my answer?
I submitted it online and I was told it was wrong. I also tried 10.22 and 10.24 to see if there was a rounding error.

physics. Can you check my answer?
Two spherical objects are separated by a distance of 2.41 x 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object...

physics
Ok. I did that and I found that Q= 1.64 x 10 ^ -18. I then divided that by 1.6 x 10 ^ -19. The answer I got was 10.23. I am being told that is the wrong answer. Could you please double check that for me? Thank you!!

physics
Two spherical objects are separated by a distance of 2.41 x 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object...

Math
Simplify: 3x (to the -2 power) 2x(3rd power)times x(to the -2 power) times x(to the 7 power) 3x (to the negative 3 power) times (-4 power)

books
The Call of the Wild: One of the themes in Jack London's book, "The Call of the Wild" is power. Discuss Buck's use of power throughout the book.

geometry
how do you find the circumference of a circle with the area of 169 pie m squared(in the terms of pie)? Please tell me how to do it. Don't just give me the answer

Biochemistry
When do plants carry out aerobic respiration

6th grade Math
If your doing that then find if its a decimal if so you only put 2 or 3 threes

6th grade Math
If your doing that then find if its a decimal if so you only put 2 or 3 threes

Science
Explain how stomates help maintain homeostasis within the leaf.

Science
Describe the feedback mechanism that occurs at the stomates of plants.

6th grade Math
I have a word problem with a pattern. I just can't figure it out. - On the first night, Kim's mom gave her a nickel, on the second, she gave her five nickels, on the third, she gave her fourteen nickels and on the fourth night she gave her thirty nickels. Her mother as...

chemistry
Ok. Thank you.

chemistry
When I use the lowest number of digits (i think your talking about .09) I get 4.7atm.

chemistry
I am trying to find pressure. R=.0821 T=1273 K V=2 n=.0997 When I put .0997 in the PV=nRT equation I get 5.2 atm, and when I put in .09 I get 4.7 atm. Which answer should I put? Which is more accurate?

Chemistry. Please help!
That is what I am thinking. Thanks.

Chemistry. Please help!
That is what I am thinking. Thanks.

Chemistry. Please help!
I gave three different answers. Which one looks OK?

Chemistry. Please help!
A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original sample was magnesium...

Chemistry
So that would give you .39 mol. Which would then give you P = 20.77 atm. I see what you are saying about the numbers in this problem. Unfortunately my teachers often gives problems that seem to have something missing, and I dont know what to do about it. I was also wondering i...

Chemistry
Those are all the numbers in the problem. I worked further in the problem and found... (a) 15.9/20.29= 78.54% and for part (b) I found that 20.29g of MgCO3 makes .24mol CO2. So.... Pressure of CO2 = 12.54 atm. Does that seem right?

Chemistry
A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original sample was magnesium...

chemistry Plz help!
To make NaTcO4, Tc metal is dissolved in nitric acid to make HTcO4, NO2 and H2O. Then the product HTcO4 is treated with NaOH to make NaTcO4. If you begin with 4.5 mg of Tc metal, how much of NaOH (in grams) is required to convert all of the HTcO4 into NaTcO4? I dont even know ...

social studies
what challenges did english settlers in north america face?

chemistry
I HATE CHEMISTRy

Chemistry.
Calculate the mass of CaCO3 that would produce 40 mL at STP. STP means P= 1 atm and T= 0 degrees C. How do I find the mass?

Eighth Grade Math
What are two ways to find the answer to 168 times 55 ?

Eighth Grade Math
What are two ways to find the answer to 237 times 76 ?

Eighth Grade Science
A tube has gas within it whose volume equals 250 liters at a temperature of 300 celsius K . If the pressure of the gas is kept constant, what will the temperature be if the gas volume is increased by 50 liters ?

Eighth Grade Science
At 275 celcuis K ,an air filled balloon has a volume of 200 liters . If the pressure of the air remains constant, what will its volume be at 300 celsius K ?

Science
A liter(1000cubed)of gas is under a pressure of 80.00cm of mercury . What pressure is needed in order to reduce the original volume of the gas to 600.0cm cubed?

Chemistry
Each of four identical tires of a car is filled with a different gas. Gas pressure in each tire is 3.0 atm at 25oC. One tire contains neon, another – argon, the 3rd one has krypton, and the last one has unknown gas. How many molecules are there in each tire? So far, I hav...

chemistry
For that part I thought that the formula would be NiF2.

chemistry
Suppose you live in a different universe where different amount of quantum numbers is required to describe the atomic orbitals. These quantum numbers have the following rules: N principal 1,2,3,…. L orbital =N M magnetic -1. 0. +1 How many orbitals are there all together ...

Physcial science
How many joules of heat are required to melt 40kg of ice at 0 degrees celsious?

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