# Posts by kelly

Total # Posts: 1,764

**Physics**

How are series and parallel circuits wired?

**Calculus**

I have a problem about complex number. Let z=7e^(7*pi*i/4) . Write z, z^4, z^7, z^(-2) in the form a + b i I have no idea how to do it. Any hints will be appreciated.

**Chemistry -- to Dr.Bob**

because its a redox reaction. the number of electrons in the Fe2+ to Fe3+ half-equation must equal the number of electrons in the MnO4 to Mn2+ half-equation, which is 6. Thus you need to have 6 Fe2+ and 6 Fe3+ also. Balance each half-equation first, and then combine the 2. :)

**Chemistry -- to Dr.Bob**

put 6 before Fe2+ and Fe3+

**physics (making a yo-yo)**

I am required to make a yo-yo that will unwind at a slowest rate possible, without using friction as a factor. Will it help if I make it hollow, so it would have more rotational inertia? Any other ideas? Please help!!

**chemistry**

I have done a titration to find the vitamin c concentration in cabbage. This turned out to be 1.25x10^-4 moles per litre. However, I am required to find the concentration in mg/100g. Can I convert moles per litre to mg/100g or is there another way to calculate it. Please help!!

**AP HISTORY**

do you know anything about georgia washington?

**AP HISTORY**

why did they choose georgis washington to head the army in 1775?

**AP HISTORY**

what was the prinipal reasontaht the second continental congress selected georgia washington to head army in 1775?

**physics**

An ionized helium atom has a mass of 6.6*10^-27kg and a speed of 4.4*10^5 m/s. The atom moves perpendicular to a 0.75-T magnetic field on a circular path of radius 0.012m. Determine whether the charge of the ionized helium atom is +e or +2e. Can anyone please give me some ...

**physics**

An electron is moving through a magnetic field whose magnitude is 8.70*10^-4 T. The electron experiences only a magnetic force and has an acceleration of magnitude 3.50*10^14 m/s^2. At a certain instant, it has a speed of 6.80*10^6m/s. Determine the angle (less than 90degrees...

**R.E/history**

Why did the Romans invade Palestine in the time of Jesus?

**physics**

A gyroscope consists of a rotating uniform disk with a 60-cm radius, suitably mounted at one end of a 15-cm-long axle (of negligible mass) so that the gyroscope can spin and precess freely. Its spin rate is 1540-rev/min. What is the rate of precession if the axle is supported...

**english**

cause there's one driver? duh

**math...help me! this is hard!!!!**

you have three jugs and a river of water. The jugs are known to hold exactly 3, 7, and 10 liters. How can you use these jugs to measure exactly 5 liters of water?

**algebra 2**

log x= 2.4 i have tried but i just cant get it i missed class that day and my teacher wont explain.

**algerbra**

AN ORCHESTRA CONSISTS OF STRINGS INSTRAMENTS AND WIND INSTIMENTS IN A RATIO OF 9 TO 4. THERE ARE 91 STRINGS AND WIND INSTRUMENTS IN THE ORCHESTRA. hOW MANY STRING INSTRUMENTS ARE THERE? how many wind instruments? Use a system of equation to model each situation. solve by any ...

**Algebra Help Radical notation**

5^1/7 in radical notation

**brain teasers**

3 S to a T

**chemistry-check over work**

2C6H5Cl(chlorobenzene)+C2HOCl3(chloral)=C14H9Cl5(DDT)+H2O in a gov. lab 1142 g of chlorobenzene is reacted with 485 g of chloral. a). what mass of DDT is formed? 1166.179 g of C14H9Cl5 b). which reactant is limiting?C2HOCl3 which reactant is in excess?C6H5Cl c). what mass of ...

**algebra 1**

does any one know how to do pattern and algebra

**Algebra**

how do u factor out 2x^3 - 5x - 3

**Math-measurement**

What is the volume of the package?

**MATH**

4gal 5qt + 8gal 2qt

**Math**

The ratio of 7 dimes to 3 quarters= 70 and 75 common factor of 5. So I can divide both numbers by 5 to get a ratio that means exactly the same thing as 70 to 75. This ratio will be 14 to 15

**Math**

Rewrite the statement, using percent notation. Of 50 houses in a development, 20 are sold.

**Math**

Ok is this always how we find rhe rate of something

**Math**

Find the rate 392ft/ 8 sec

**math**

Thank you so much

**math**

Approximately 5 out of every 10 students at Kendra's college live on campus. The college has 5,000 students. How many of them live on campus? Set up a proportion.

**Chem**

yea i cant get the equation either and i was there

**Chem**

Calculate the mass of baking soda, NaHCO3, needed to neutralize 3.0mL of 3.0 M hydrochloric acid.

**trig**

transform the expression on left to one on right csc x-sin x to cot x cos x

**accounting**

identify three external users of accounting information and indicate two questions they might seek to answer through accounting information.

**Physics**

Ann is driving down a street at 58 km/h. Suddenly a child runs into the street. If it takes Ann .71 s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m. When I converted 58km/h I got 16.111 m/s but now I'm not ...

**stupid test online**

What is leryec unscrambled?

**pre-cal**

can anyone please explain to me how to simplify this exponential expression??I got no idea...THANKS A LOT! [(-8x^6)/(y^-6)]^2/3

**physics**

what is the final temperature when a 3.0 kg gold bar at 99 degrees is dropped into a .22 kg of water at 25 degrees

**Music**

So, I need zo post my question again... I have to write a report for school on the topic of film music. I want to show my class mates how different you feel when you see a movie scene with two different musics. So I was looking for two versions of a scene of any movie. One ...

**music**

Thanks SraJMcGin. Well I have been on your links. The first one istn't really what I am looking for. I mean I wanted to have the same scene with to different music versions. The secound is better. But the thing is that in that scene you only got the new music but all the ...

**music**

Well, yeah that's an option. The only problem is that I really don't live at all near a video rental shop. So that's a problem... Maybe someone else got an idea... But I'll see what I can do. Thanks for your suggestion.

**music**

Hey GuruBlue Well, I've been on the webside. But there are just film reviews and so you mean I should buy the two DVDs? Well actually I have been looking for a scene of a movie just with two different musics... I also like your idea, but have you maybe a link where I had ...

**music**

I have to write a report for school on the topic of film music. I want to show my class mates how different you feel when you see a movie scene with two different musics. So I was looking for two versions of a scene of any movie. One version should be with the 'real' ...

**music**

explain ternary form what have played/sound in this structure

**science**

ok thank you that makes sense.....but do you know how gene splicing, cloning or stem cells would help a patient

**time periods**

can someone help me connect thesetogether. Napoleon/Romanticism Industrial Revoluiton Nationalism Imperliasm WWI Russian Revolution/Communist Russsia WWII The Cold war I need to show some connections between the events

**HELP!!! I ALSO HAVE FINALS TOMMORROW!!!!!!!!!!!**

Importance of simile, metaphor, idioms, and tone in literature.

**Algebra**

I really ned help how do you solve these types of equations 3x^2-27=0 2t^2=100 -4y^2=36 x^2+25=25 please help me and tell me how you got it

**science**

no i did not titrate....but i guess you're right about #2 i wasn't sure what to write

**science**

ht tp :/ /i1. ti nypi c.c om/ 7yr papx.j pg I did this experiment about antacids and i have to write three validity issues i could've had. I have two but I need one more. 1. I should have done more trials for more accurate results 2. when i stirred the antacid and acid ...

**science**

but we werent given a list of ingredients (i did this in school and my teacher just handed the antacids labeled generic or brand name)

**science**

ht tp :/ /i1. ti nypi c.c om/ 7yr papx.j pg I did this experiment about antacids and my hyppothesis is that "If I use the generic antacid to create a neutralization reaction, it will have the same effectiveness of the name brand because...." I'm not sure to what ...

**history**

so he was using this violent propaganda to make the Austrian government seem horrible so Austrians would want to create union and support him?

**history**

what does" Hitler began a violent propaganda campaign by press, radio, and platform against alleged misdeeds of the Austrian government" mean? why was Hitler using propaganda for in this context? was he try to expose a bad Austrian government?

**history**

so because all of this was done did this create tension? Your explanation is clear but I really don't understand how this was one part of leading to world war II?

**Social Studies**

What are the main landforms in New England and the bodies of water that surround and run through New England?

**5th grade writing assignment**

I need some ideas on a story about a Christmas Tree. A short and simple idea would be great!

**english**

can someone just give me straightforward answers to help me study for my test tomorrow? when we say "Shakespeare's time" what years is this referring to...what centuries? Why was theatre important during Shakespeare's time?

**Calculus**

Is thsi a solution of an ordered pair (4, -1) 4x = -17 - y 2x = -12 -4y I say yes ? Is this how you do it. 4(4) = -17 - -1 = 2(4) = -12 - 4(-1)

**Calculus**

Thanks looks like I forgot to subtract 8

**Calculus**

f(x) = x^2 - 8x - 17 at x = 4 I came up with 8 ?

**Calculus**

Find the derivative of f 0f x. f(x) = x^2 - 8x - 17 at x = 4

**Calculus**

Complete the identify sin(a + b)cos b - cos(a + b)sin b

**Science**

If the continents were drawn on a Mercator map, would your chances of finding a fit have been improved? Explain.

**math**

If p,r, and s are three different prime numbers greater than 2 and n = p*r*s, how many positive factors, including 1 and n, does n have?

**science**

Relate progressing fossil evidence, changing habitats and climates to multiple adaptations and thus lifestyle changes. My first example is bipedalism but would another one be that sinc the earth got colder intelligence increased which caused humans to learn how to mke tools ...

**french**

how do you know when the object is direct or indirect.... do indirect objects usually have an "a" (with accent to the left) and direct objects use "les"?

**Calculus**

The derivative of f of x f(x) = x^3 + 19 ; x = 8

**Calculus**

Find the slope of the tangent line to the graph of f at any given point f(x) = -2x + 6 at (2,2)

**WWII**

//wiki.answers. com/Q /Wh lied_c ount ries _in _World_War_2 U.S., Great Britain (UK), Russia, Canada, China, Australia, France, were major Allies. There were many more, including New Zealand India Belgium (May 10 1940-invaded) Brazil Greece (October 28 1940invaded) Holland (...

**science**

i do not understand this question and how to anseer it, can someone please help? htt p://i12. tinypic. com/6k8ytdd.jpg the question is in the link because it has a graph that goes along with it that I do not understand, just take the spaces out of the link. but the question ...

**science**

the question is in the link because it has a graph that goes along with it that I do not understand, just take the spaces out of the link. but the question is: Come up with a evolution scenario involving natural selection for the graph. I do not understand the trend in the ...

**science**

i do not understand this question and how to anseer it, can someone please help? htt p://i12. tinypic. com/6k8ytdd.jpg

**Calculus**

A piecewise function is given. Use the function to find the indicated limits, or state that a limit does not exist. (a) lim is over x-->d – f(x), (b) lim is over x-->d + f(x), and (c) lim is over x-->d f(x) x^2 - 5 if x < 0 f(x)= -2 if x ->0 ; d = -3 1. (a...

**english**

how do each protagonist from one flew over the cuckoos nest,stranger in a strange land and catcher in the rye handle costom rules,behaviors of their respective societies

**calculus**

A piecewise function is given. Use the function to find the indicated limits, or state that a limit does not exist. (a) lim is over x-->d – f(x), (b) lim is over x-->d + f(x), and (c) lim is over x-->d f(x) x^2 - 5 if x < 0 f(x)= -2 if x ->0 ; d = -3 1. (a...

**Calculus**

How many 2-digit numbers can be formed using the digits 1,2,3,4,5,6,7,8,9 and 0? No digit can be used more than once

**english/history**

could an example for the question i asked be superman comic strips (saving lois lane, etc)?

**english/history**

How have our romantic ideals today as evidenced by films stories magazines popular cultre and the media have been influenced by chivalry of the Middle Ages? Examples please?

**Calculus**

makes no sense that's how i was doing it and I came up with 3.5 a11 = 12 + 10(.8444) = 3.5 however the answers to choose from are .32 -8 -10 .34

**Calculus**

Write a formuls for the general term(nth term) of the arithmetic sequence. Do not use a recursion formula. Then use the formula for A to the n to find the indicated term of the sequence find a11: 12, 10, 8,...

**sci 275**

can someone please help me with this.

**sci 275**

create a outline of the risk of using malathion according to the four steps of risk assessment presented. . Hazard identification . Dose- response . Exposure . Risk characterization

**calculus**

thanks that's what I had I just wasn't sure if -2 + y = -3 (-2,-1) if I multipied -2(-2, -1)

**calculus**

x + y = 3 should be - 3

**calculus**

Solve the system by the method of your choice. Identify systems with no solutions and systems with infinitely many solutions, using set notation to express their solutions: x + y = 3 -2 + y = -3 (0 ,-5) (0 , 0) (-2 ,-1) (-2,-3)

**calculus**

I need to repost

**calculus**

Solve the system by the method of your choice. Identify systems with no solutions and systems with infinitely many solutions, using set notation to express their solutions: (0 ,-5) (0 , 0) (-2 ,-1) (-2,-3)

**constitution**

what are common privacy rights held by us citizens?

**earth science**

The earth's differentiation and size were significant factors for life on Earth because Earth's composition and gravitational attraction _____. a.keep the moon and sun in orbit b.keep people grounded c.helped to create and retain Earth's atmosphere d.create and ...

**Calculus**

yes, thanks just like to check my answers

**Calculus**

Write the form of the partial fraction decomposition of the rational expression. It is not necessary to solve for the constants: 4x + 1/(x + 6)(x - 5) I came up with A/x + 6 + B/x - 5

**Calculus**

Thanks

**Calculus**

Determine whether the given orderd pair is a solution of the system ( -2, 1) X/3

**Calculus**

I was thinking clearly, silly mistake that's for sure , thanks

**Calculus**

I had this on a test: Use the half-angle formula to find the exact value of the expresseion: sin 22.5 degrees my answer - 1/2 sqrt2 - sqrt 2 was wrong

**calculus**

thanks anyway

**calculus**

exact question is : Use the given information to find the exact value of the expression Find cos(2,x),csc x= x lies in quadrant II -7/25 24/25 7/25 -24/25

**calculus**

yes

**calculus**

Find cos(2,è),csc è = è lies in quadrant II I didn't have a theta sign so I used q -7/25 24/25 7/25 -24/25