ana

This page lists questions and answers that were posted by visitors named ana.

Questions

The following questions were asked by visitors named ana.

You know f(x)= ax² + bx + c. Well when you get the equations why is it always like: 1) a + b + c = something 2) 4a + 2b + c = something 3) 9a + 3b + c = something I mean why is the first one always 'a+b+c'? etc. Also does it have to be f(x) or can it be f...

What are a few excersizing you can do to strengthen the abdominal muscles Which set of muscles would you use for lateral bending and rotation of the trunk? For abs, sit-ups or crunches are considered the best. http://www.shapefit.com/abs-exercises-exercis...

can anyone help me with this question what is the advantages and disadvantages of hydrogen power as opposed to hydrogen fuel, also what is the equation for hydrogen feul? I do not understand your first question. Hydrogen power REQUIRES hydrogen fuel. Hydr...

ok i need to figure out how a balanced reaction of a fuel cell would look like. you know a source of hydrogen power. http://auto.howstuffworks.com/fuel-cell.htm

A softball diamond is a square with sides of 60 feet long. How far is home plate to second base? Round to the nearest tenth if necessary. 60 Home plate, first base, and second base form a right-angled triangle, with home plate to second as the hypotenuse....

what are four cinematic techniques used in the film Rocky? -Thanks so much I used Google to search for <b>cinematic techniques rocky</b>, and here are the results. I hope you can find your answer in here: http://www.google.com/search?q=cinematic+technique...

Can you guys give me a clue in how to approach this problem? Commercial brass,an alloy of Zn and Cu,reacts with Hydrochloric acid as follows: Zn+2HCL-->ZnCl2+H2 (Cu does not reacts with HCL)When.0565g of a certain brass alloy is reacted with excess HCL,.0...

hi... i have to do a project and its about drawing a stamp for any of the amendments... i want to do a stamp on freedom of SPEECH..and i don't know what to do for it... i need suggestions..please...

why is freedom of speech important im america? wat are 3 examples of how it protects americans?? plz help...

hi.. i am doing a book report on "dead girls don't write letters" i am not sure who is the protagonist and the antagonist... i need help....

hi... i need help finding 2 equations that i would use for this elimination process.... this is what they gave me: * the sum of the digits i a two-digit is 14. If the 2 digits are reversed, the new number is 18 less than the original number. Find the orig...

when was the first microscope discovered?

the ti is symbolized by

why is reproduction important to living things and their evolution?

on pigskin 6th gade paper october 12th 2008 question #2 determine the state capitals in whitch agame will be played.

bromide is a better nucleophile toward the intermediate bromonium ion than ethanol. what product would be obtained if ethanol did carry out this nucleophilic attack?

how do you use a microscope?

identify the bay, sound, or gulf that serves as base for a) the Sacramento and San Joaquin rivers b) the Alabama River system c) the Connecticut River system Thanks for your help!!!

propose new hiring practrrices for the company to follow in your proposal be sure to address the legal and ethical issues involved in discrimination and affirmative action polices

b. What kind of birth rates are plotted in Figure 2 (page 9)?

the proprietos of two businesses, L.L. sams company and Melinda Garcia career services, have sought loans form you. to decide whether to make the loans, you have requested thier balance sheets

I did an experiment where i used straws and water to simulate a chemical equilibrium. what other differences are there between a real chemical equilibirum and my exeriemtal one.

how could one distinguish 1-octanol from 1-octene and toluene from 1- octene?

solve sin x-1=0 for 0degress<x<360 degrees

can someone proofread my homework? is just 5 pages.pleaseee is urgent

if you had a fraction strip folded into tenths what fractional lengths could you measure with the strip?

if today is sunday jan 9, tuesday will be jan ll, december____, february_____=25

What is the gas pressure inside the box shown in the figure? I have a picture but website wouldn't allow me to post the link for the picture. So I am trying my best to describe it. it is a u-shape tube and it is holding mercury in it. One side has 16cm of...

A 10cm times 10cm times 10cm wood block with a density of 700kg/m^{3} floats in water. What is the distance from the top of the block to the water if the water is fresh? weight= density*volume*g weight=700*(10^-3)*9.81 weight=3418.877985 weight=densitywat...

Water flowing through a 2.8 cm-diameter pipe can fill a 200 L bathtub in 5.8 min. Flow rate Q = volume/time = speed * cross section area Q=200/5.8=speed*.028....i get 1231.52 or Q=(200/348)=speed*.028...i get 20.52 both are wrong so what do i do?

How many grams of water (H_2O}) have the same number of oxygen atoms as 1.0mol of oxygen gas?

The 3.0 cm-diameter water line splits into two 1.0cm-diameter pipes. All pipes are circular and at the same elevation. At point A, the water speed is 2.0m/s and the gauge pressure is 50kPa. What is the gauge pressure at point B?(pointing toward one of the...

How many grams of water (H_2O) have the same number of oxygen atoms as 1.0 (mol} of oxygen gas? atomic mass of H is 1 and O is 16, so H2O has a molar mass of 18. Oxygen gas is O2, with a molar mass of 32. So 1.0 mole of oxygen gas has 6.02x10^23 molecules...

How many atoms of hydrogen are in 220g of hydrogen peroxide (H2O2)? the molecular weight of H2O2 = 2*1 +2*16 =34 therefore, there are 220/34 moles of the molecule = 6.47 moles, so there are 6.47xAvogadro's number of molecules there are 2 H atoms per molec...

18g of liquid water is placed in a flexible bag, the air is excluded, and the bag is sealed. It is then placed in a microwave oven where the water is boiled to make steam at 100C. What is the volume of the bag after all the water has boiled? Assume that t...

On a cool morning, when the temperature is 13 C, you measure the pressure in your car tires to be 30 psi. After driving 50 mi on the freeway, the temperature of your tires is 42C. What pressure will your tire gauge now show? T1 = 13 C T2 = 42 C P1 = 30 ps...

Total lung capacity of a typical adult is approximately 5.0L. Approximately 20% of the air is oxygen, as air is 20% oxygen. At sea level and at an average body temperature of 37 C, how many moles of oxygen do the lungs contain at the end of an inflation?...

31m/s is a typical highway speed for a car. At what temperature do the molecules of nitrogen gas have an rms speed of 31m/s? T=[(x^2)*m]/3k so x=31m/s m=N2=2*14=28g=.028kg k=1.38e^-23..I'm keep getting 6.333651477e^10...which is incorrect. What am I missi...

7.7mol of helium are in a 16L cylinder. The pressure gauge on the cylinder reads 65psi. What are (a) the temperature of the gas in Celsius and (b) the average kinetic energy of a helium atom? Part A: so this is what i did T=PV/nR and C=T-273 P=65psi=4.481...

How many atoms of hydrogen are in 220g of hydrogen peroxide (H2O2)? This is what I did so far: the molecular weight of H2O2 = 2*1 +2*16 =34 therefore, there are 220/34 moles of the molecule = 6.47 moles, so there are 6.47xAvogadro's number of molecules th...

how do you find the mass of a nitrogen molecule?

At what temperature is the rms speed of helium molecules half its value at STP (0 C}, 1.0 atm)?

31m/s is a typical highway speed for a car. At what temperature do the molecules of nitrogen gas have an rms speed of 31 m/s? (Answer in K)

7.7 mol of helium are in a 16 {\rm L} cylinder. The pressure gauge on the cylinder reads 65psi. What are (a) the temperature of the gas in Celsius and (b) the average kinetic energy of a helium atom?

At what temperature is the rms speed of helium molecules half its value at STP (0 C, 1.0 atm})?(answer in K) I think i need to use V_rms=sqrt3kT/m k=1.38e^-23J/K helium has 4g so i think helium molecule is 4/6.02e23 but i don't know how to proceed further...

This is the last time I'm posting this question. So pleas don't get mad. How many atoms of hydrogen are in 220 g of hydrogen peroxide (H2O2)? (220)/(34) then i multiply that # with 6.02E23 then again i multiply that # with 2 to get the number of hydrogen...

7.7 mol of helium are in a 16 L cylinder. The pressure gauge on the cylinder reads 65psi. What are (a) the temperature of the gas in Celsius and (b) the average kinetic energy of a helium atom? p=65psi=4.481592E5 p=65psi=4.42atm n=7.7mol v=16=.016m^3 T =...

How does the spin of an electron affect its energy?

4. Which of the following species is extinct? 1 American bald eagle 2 bison (buffalo) 3 passenger pigeon 4 giant panda

A 240 g ice cube at -10 C is placed in an aluminum cup whose initial temperature is 70 C. The system comes to an equilibrium temperature of 20 C. What is the mass of the cup?(answer in kg)

0.75 mol of argon gas is admitted to an evacuated 40 cm^{3} container at 40 C. The gas then undergoes an isochoric heating to a temperature of 500 C.

If motivation consists only of drive-reduction, what is the perfect state of a human being? Competitive, hard driving Not hungry, thirsty, no pain, absence of fear, basically a coach potato Constant change, always re-establishing homeostasis Gradual movem...

If an athlete weighs 153lb and has 15.0% body fat by weight, how many pounds of fat does the athlete's body contain?

Ceckpoint Introduction and conclusion. I am having a problem with writing an introduction for my research paper and a conclusion. My research paper is about education. But my professor said it has to be in a rough draft what does that mean. can somebody h...

George has a bag of marbles. Inside the bag are 5 red marbles, 3 green marbles, and 2 blue marbles. He draws out two marbles in a row, without replacement. What is the number of outcomes?

At Maryland Middle School, there are 9 mathematics classes. If two mathematics classes are selected for a school competition, what is the number of possible outcomes?

List three attitudes of management that can inhibit the establishment of a high standard of customer service and explain each briefly in your own words.

Mr. Rosart selects two students from his class to present their book reports. He places the names of each student in a box and randomly picks one at a time. The class has 14 boys and 12 girls. What is the probability that the second name Mr. Rosart picks...

in the layer ofsedimentary rocs the oldest can be find in where

Suppose that two people, Mary and John each live alone in an isolated region. They each have the same resources available, and they grow corn and raise pigs. If Mary devotes all her resources to growing corn, she can raise 200 pounds of corn per year. If...

The sides of a parallelogram are 15 ft and 17 ft. One angle is 40° while another angle is 140°. Find the lengths of the diagonals of the parallelogram (to the nearest tenth of a foot)

Two ships leave a harbor together traveling on courses that have an angle of 124° between them. If they each travel 511 miles, how far apart are they (to the nearest mile)?

What did Thomas Jefferson & Benjamin Franklin say or write to influence the Declaration Of Independence ?

1. How many joules of energy must be absorbed to raise the temperature of 20 grams of water from 25°C to 30°C?

Which of the following would NOT be an informative or positive message? Summary Procedures Manual Transmittal Direct request

Which of the following would be the LEAST appropriate in the closing paragraph of a negative message? Let us know if model #A01 would be a suitable substitution. Our layaway plan will enable you to purchase all the clothes the children need for school. We...

calculate the number of atoms of C of 25.0g C?

1) write net equations for the reactions in which of the following ions? sulfate aion- chloride ion-

which is the simplest form of the radical expression sqrt (10)+6sqrt(10)+-3sqrt(10)

simplify the expression -10xy - 15y / 5y -10xy -3y^2 is my answer rigth or wrong

whats the meaning of ..The more i stretch and exercise, the more flexible my joints become....i need the context clue..please

i don't know how to do this 1/2> on the top is??? on the right 1/2 on the butttomm?????

add or subtract, -8-3 -8-3= -8+(-3) 3+8= -11

what does intertia means?

multiply or divide. Then compare using <,>, or = 10(-1/2) ? 20÷4 can some on do it 4 me please

-2 2/3 ÷3 ? 5(-2.4) multiply or divide.then compare using <,>,=

answer the question with a complete sentence that uses a word from the spelling list. add a sufix to the underline word to create the correct word. Does Herb resemble his brother? the word from the spelling list is "rehearsal"

which variable is the dependent variable?

what were the two images paine uses in the first 10 lines of the crisis. what kinds of poeple does paine identify thes images? why are these images appropriate

we have done experiment in school and for homework we must write chemical reactions that have happend during the experiment. the experiment was like this : first we took an unknown substance than we have put some CuO , we mixed that two substances togethe...

At a production level of 1400 items, the total cost is $7250 and the marginal cost is $25. Use this information to estimate the costs of producing the following number of items. Your answers should be whole numbers. a) 1401 items . b) 1399 items . c) 1450...

The following table gives the cost and revenue, in dollars, for different production levels, q. Answer the questions below. q 0 100 200 300 400 500 600 R(q) 0 450 900 1350 1800 2250 2700 C(q) 670 865 990 1095 1255 1820 2590 1. The fixed costs are dollars...

Adnan's Flower Shop provides floral arrangements for holidays and events. Adflans sold Oxford Cdy Hall a holiday arrangement for 10,000 on account in November Due to a government shutdown in December, Oxford only paid $1,500 otthe amount due within the pr...

Glenmore Corp. purchased a fax machine at the beginning of 2007. The fmx machine cost s1,000 and is expected to last live years Its salvage value is expedted to be $50. It Glenmmore uses straight-line depreciabon, what will the fax mactiines net book valu...

Answers

The following answers were posted by visitors named ana.

ok... how does gfreedom of speech protect a person and what would america be like without freedom of speech??

would that be like amrtin luther king jr did???

ok..thank you very much. you were a great help

thank you very much...once again..you are a great help...

do u have any good websites about freedom of speech...or any other information on it???

are there any other websites dealing with freedom of speech??

i also need to know what the theme of the story really is

so...ummm...sunny is the main character and jazz is the antagonist???

umm...wat i don't know..is if sunny is the main character or not...and if jazz is the antagonist or not i really need to know

oh...ok... if i give you a little summary of the story do you think it might help...

i don't seem to understand...

i need a simple way to do equation 2....

i tried it and it works but in our class the teacher tells us to do equations using the number they give us...we are not supposed to add any other numbers until we actually solve it..

t= hours 0 1 3 4 7 8 9 l(t) people 120 156 176 126 150 80 0 concert tickets went on sale at noon (t=0) and were sold out within 9 hours. the number of people waiting in line to purchase tickets at time t is modeled by a twice-differentiable function L for...

What caused more europeans to bcome interesed in asia?

Underline the word or enphazied on the word

i got 13341.6 ...it is incorrect

weight= density*volume*g weight=700*10cm*9.81 weight=68670 weight=densitywater*g*10cm*10cm*depth 68670=700*9.81*10cm*10cm*d d=.1 it isnt right:-(

oh ok weight= density*volume*g weight=700*1000cm*9.81 weight=6867000 weight=densitywater*g*10cm*10cm*depth 6867000=700*9.81*10cm*10cm*d d=10 still didn't work,am i missing something?

can help me by placing numbers cuz its confusing me with words

Annie, how can you say that...it is my question i am still working on it

ok so i did speed=200/(pi*.25^2) ...i got 3.97 which is wrong maybe because i have to get the answer in m/s

weight= density*volume*g weight=700*(0.001)*9.81 weight=6.86newton weight=densitywater*g*10cm*10cm*depth 6.86=1000*9.81*.1*.1*d 6.86=98.1*d d=.0699...which is still wrong i have to get an answer in cm.

thanks....u really helped a lot...people have to specify when helping out someone

I feel I'm being helped in Asia ...sorry to be pain in the neck. just a question if u don't mind...how do u convert from dm/s to m/s

dont worry i figured it out...i didn't have to convert...it was a problem of putting wrong brackets in my calculator

well my prof. provided me with this info..

we are students who are struggling. we are not here to get answers but we need help step by step. everybody is not same

8-3x greater than or equal to 11 x less than or equal to -1 4x-1 is greater than 19 x>5 i hope i'm bot wrong

I meant to say I hope I'm not wrong

your very welcome

I will try my best

6(4-3x)+4x<3(9+2x) 24-18x+4x<27+6x 24<27+28x -3<28x (-3/28)<x check my work

Nice to hear that

4y-3<7y-4 -3y<-1 y>(1/3) again check my work

5x+y=7 6x+7y= -9 6x+7(7-5x)=-9 X=2 Y=-3 check answers by plugging into the equations

"It makes sense." I was in a rush when I typed that.

i'll use that for future

Thanks, I totally forgot about adding 14.7psi

Never mind this question...i figured out my mistakes

I appreciate your help but this isn't working out

so it is 28g/avagradro's number right?

Now, I'm getting 4870.270527 when I insert these values (2)*(6.470)*(6.02e^23)...is there any another way that i can insert theses into the calculator?

Sorry again to be pain in the neck...but this is what i got 2 * 6.47000 * 6.02E23 = 7.78988 × 1024...it is still wrong...this is driving me crazy

yes, it does. I tired all the combination but IT DOESN'T WORK. I am about to give up on this problem

thanks for sites

At what temperature is the rms speed of helium molecules twice its value at STP?

(2 * 6.47000) / 6.02E23 = 2.14950166 × 10-23...oh my god it is still wrong...

I did'nt follow your approach

7.7 mol of helium are in a 16 L cylinder. The pressure gauge on the cylinder reads 65psi. What are (a) the temperature of the gas in Celsius and (b) the average kinetic energy of a helium atom?

Your answer is correct, but i was wondering how can i use the formula to answer this question?

For the 2nd part i got around 1100k by playing around, but not sure if it is correct

oh yea i meant "please"

2(-1/3)-6(3/4)=-31/6 and if you the answer in decimal then it is -5.16666667. Check my work

T = PV/(nR) =(4.42 * .016) / (7.7 * 8.31) = 0.0011052245 so when (0.0011052245)-(275.15)=-273.14 not working or (4.481592E5 * .016) / (7.7 * 8.31) = 112.062563 so when (112.062563)-(273.15)=-161.09 also did not work

Thanks Joe. It worked, but don't why is that even though i used the formula( i think i used it correctly).

so for part b, i have to use KE=3/2kT where k=1.38*10JK^-1 so -140C becomes 133.15K so (3/2)(1.38*10^-23)(133.15), right?

I meant Thanks Joe. It worked, but don't know why is that even though i used the formula( i think i used it correctly).

This is where I am confuse is the introduction in the beginning of the essay or is that the conclusion?

4.5 N, 10.5, 23.0

I think that they are telling you to how would you memorize 5 terms of the muscoloskeletal system.

help me write the executive summary

oh...i thought you could write it... :(

I belive it is b. But make sure.

mm i don't know

mm no entiendo.. k kieres decir??

its diamond problem ok

ohh i know!!!=) ama 8th grader xd

its it right or wrong???

because it would be the same answer and the smart one that i asked said that it was right..da!!

o really o woow thanks

oww ok ama stu;;;;id

the Nucleus controls the whole cell. It's known as the "brain".

k es lo k tratas d preguntar?

oww ...so its < cazz i'm kind of confusee about this two <>

thanks a lot -.- i can use search engine too -.-"

that did not help me

Determine the reading of the voltmeter in the circuit shown below if V = 100 V, R1 = 59 Ohms and R2 = 22 Ohms

how would you define the speaker's love for annabel lee ? would you want to feel or be the object of such a love ? explain why or why not

Choose the correctly punctuated sentence. When she told him those socks are interesting she meant the socks looked ridiculous. When she told him "Those socks are interesting" she meant the socks looked ridiculous. When she told him, "Those socks are inter...

the position is like this:- 7.50N-> |m1|m2|m3|

F CORRIO 1/2 CAMINO A LA ESCUELA . M CORRIO 1/4 DE LO QUE CORRIO F . QUE FRACCION DEL CAMINO CORRIO M

necesito ropa nueva.___ compro hoy

22x2y14-22x4y13

what is the bolded word a subject pronoun or an object pronoun? we wanted to thank them for all of their help.

for 6z=126, mike wrote that z=756. explain what mikes mistakewas. then tell the correct answer.

1.Voy a nadar en la piscina. Necesito(I aam going to swim in the swimming pool. I need) un ttraje de baño(bathing suit). 2.Está lloviendo mucho. Necesito (it is raining a lot. I need..). el impermeable y la sombrilla (a raincoat and umbrella.) 3.No puedo...