Wednesday
April 1, 2015

Posts by kelly


Total # Posts: 1,579

Physics
Hunting a black hole. Observations of the light from a certain star indicate that it is part of a binary (two-star) system. This visible star has orbital speed v = 270 km/s, orbital period T = 1.6 days, and approximate mass m1 = 6.0Ms, where Ms is the Sun's mass, 1.99 x ...
January 2, 2011

trig
How do you write the quadratic equation with integer coefficients that have the roots 7-3i and 7+3i?
December 21, 2010

math
107 total foreign language students 42 take spanish 46 take french 45 take german 8 take spanish & french but not german 6 take french & german but not spanish 8 take spanish & german but not french 24 students are taking at least 2 languages What is the probability that a ...
December 14, 2010

Math
please show how you would divide 35.6728 by 5.246
December 13, 2010

chemistry
Will sodium sulfide and iron II sulfate form a precipitate? if so what would the reaction look like?
December 12, 2010

College Physics
An object initially at rest experiences an acceleration of 1.4 m/s^2 for 5.0s and then travels at that constant velocity for another 7.0s. What is the object's average velocity over the 12s interval?
December 11, 2010

Math
Input s ? ? 9 12 15 t 70 66 62 58 54 Write the rule as an equation. Use the equation to extend your pattern.
December 9, 2010

2nd grade
Why are the flat surfaces on a rectangular prism called faces?
December 9, 2010

geometry
what is 3x + 11 = 2x + 19 ?
December 9, 2010

com155
I need an exapmple paragraph decribing a movie using adverbs and adjectives.
December 8, 2010

com155
use five adverbs and five adjectives to write about a movie. Compare an event to similar events using three comparatives and three superlatives.
December 8, 2010

ENGLISH
Peace Like a River by Leif Enger HELP PLEASE!? In Peace Like a River by Leif Enger how are Jape Waltzer and Davy Land similar and different?
December 7, 2010

english
In Peace Like a River by Leif Enger how are Jape Waltzer and Davy Land similar and different?
December 7, 2010

statistics
Im am so lost.... A bank conducts a survey in which it randomly samples 400 of it customers. The survey asks the customers which way they use the bank the most, (1) interacting with teller, (2)atm use, (3) internet bank service. It was also asked their level of satifaction on ...
December 5, 2010

Precalculus
The weather bureau reports that a cold front has just passed Austin and is heading toward San Antonio at 42kph. Since you know that Antonio is 126 km from Austin, you first think you have 126/42=3 hours before the front arrives there. However, you realize that triangles and ...
December 1, 2010

Statistics - PLEASE HELP ME
McMaster University researchers Margo Wilson and Martin Daly showed 209 male and female students pictures of attractive and not-so-attractive people of the opposite sex. Each was then offered a chance to win a prize. They could accept a check for between $15 and $35 tomorrow ...
December 1, 2010

government
yes? lol
November 29, 2010

government
it just says on the wkst that lobbying is bringing pressure to bear on all aspects of the making of public policy
November 29, 2010

government
d?
November 29, 2010

government
a lobbyist encourages parents to write letters to their representatives in congress in support of an education bill. this is an example of a. grass roots pressure b. PAC contributions c. a public interest group d. propoganda
November 29, 2010

government
d?
November 29, 2010

government
lobbyist activities re a. illegal b. regulated by laws c. not concernd with public policy d. driven by personal, not group, goals
November 29, 2010

government
its not in our txt its a wkst is it c? im just not sure if it is bc it says political action committees that work for or against political candidates and may make campaign contributions.
November 29, 2010

government
a?
November 29, 2010

government
a political action committees purpose is to a. use propaganda b. work for the interests of all americans c. raise enough money for political candidates d. encourage americans to join interests groups
November 29, 2010

government
b?
November 29, 2010

government
a political action committees purpose is to a. use propaganda b. work for the interests of all americans c. raise enough money for political candidates d. encourage americans to join interests groups
November 29, 2010

government
public interest groups? bc it says it participates in public affairs
November 29, 2010

government
a.?
November 29, 2010

government
common cause and the league of women voters are examples of? a. private pressure groups b. business groups c. economic groups d. public interest groups
November 29, 2010

government
ok thank you!
November 29, 2010

government
d?
November 29, 2010

government
which is an economic interest that is represented by most interest groups? a. business interests b. agricultural interests c. professional interests d. all of the above
November 29, 2010

spalding
its c
November 29, 2010

spalding
im not sure would it be a?
November 29, 2010

spalding
the american bankers association is an example of a? a. labor union b. public interest group c. trade association d. single interest group
November 29, 2010

statistics
Four jelly beans are selected, one at a time from a bowl containing 6 black, 6 red and 6 green jelly beans. Let x represent the number of black jelly beans selected in 4 draws from the bowl. (A) If this experiment is completed without replacing the jelly beans, explain why x ...
November 28, 2010

algebra
If there are 8 red disks numbered 1 through 8, and 6 yellow disks numbered 9 through 14 placed in a box. Find the probability of selecting a red disk numbered 3.
November 14, 2010

Chemistry
40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been added, the pH in the titration flask is 5.10. What was the concentration of the original acetic acid solution? [Ka(CH3COOH) = 1.8 ´ 10–5]
November 9, 2010

Algebra 2
solve log2(3x-1)-log2(x-1)=log2(x+1) i have absolutely no idea how to solve this. can anyone help me, please?
November 9, 2010

Math
a grid has line at 90-degree angles. There are 12 lines in one direction and 9 lines in the other direction. Lines that are parallel are 11 inches apart. What is the least number of 12-inch floor tiles needed to cover all of the line interestions on the grid?
November 7, 2010

physics
An escalator is 15.0 m long. If a person stands on the escalator, it takes 38.0 s to ride from the bottom to the top. (a) If a person walks up the moving escalator with a speed of 0.500 m/s relative to the escalator, how long does it take the person to get to the top? (b) If a...
November 7, 2010

English
The first four relate, but i'm not sure how the last two relate
November 7, 2010

physics
You take the fact that vi=0, vf=x, delta t=5.5 and a=3.1 i think you use the formula vf=vi + a delta t to find your answer
November 7, 2010

College Algebra
And yes this is College Algebra...some of us are better at things other than math. I'm doing great after being graduated for 17 years, a 9 year old, a husband and a full time job. I'm loving my A average thank you.
November 6, 2010

College Algebra
This is the question...is it possible and why?
November 6, 2010

College Algebra
Is it possible for the x-intercept and the y-intercept of a straight line to be at the same point? Why or why not?
November 6, 2010

english
Please correct my essy. 1) please tell me what to change/add. 2)please check my thesis/summary. 4)Is my intorduction good, cammos, sentenc structures. Thanks for the time u took to look at my essay. One of the most controversial issue in America is illegal immigrates. Due to ...
November 5, 2010

english
Thanks for help and websites. Here is what I've written about the building fence so far. please tell me if I'm on the right path. I'm for building the fence and tell me if i need to correct my sentence. Thanks! Due to borders being unsafeguarded, illegal Aliens ...
October 31, 2010

english
Is this correct? Eating two cups of ice-cream every night is my habit because it has sweet and delicious taste, which always makes me feel hyper and pleased and recalls my happy moments in the past, such as party at the beach and my 18th birthday party.
October 31, 2010

english
Thanks you guys!
October 30, 2010

english
Thanks for the help on putting up fence. I need help with starting general information (Background on illegal immigration& putting fence) How can I start with the background information on putting up fence? is it approiate using "THey or It is said? I just need an idea to...
October 30, 2010

chemistry
A given mass of gas occupies a volume of 449 mL at 25°C and 740 mmHg. What will be the new volume at STP?
October 28, 2010

english
I am going to write about illegal immigration and my topic is putting fence on the border and I am for it. my question that i need help with is, How can fence reduce illegal immigration? Thanks for your help?
October 26, 2010

English
Nothin. I just have to search about what Moral aspect of the Justice and I am having hard time with it.
October 26, 2010

Chemistry
The Ka values of H2CO3 are shown below. Ka1 4.6 10-7 Ka2 4.4 10-11 What is the pH of a 0.17 M solution of Na2CO3?
October 25, 2010

Statistics
If the original variance is 9 than the standard deviation is 3. George's score of 70 is 5 standard deviations from the mean (70-55=15/3=5). Then if the mean is moved to 70 we need to add 5 standard deviations to is (5 x 5 = 25) so his new score is 95.
October 23, 2010

Finance
Your 401 (k) Account at East Coast Yachts You have been at your job for East Coat Yachts for a week now and have decided you need to sign up for the company’s 401(k) plan. Even after your decision with Sarah Brown, the Bledsoe Financial Services Representative, you are ...
October 23, 2010

Maths
$150 + $120 = $15x $270=$15x 270/15=18 trips
October 23, 2010

chemistry
3.0 g Al +HNO3 > Al(NO3)3 + H2 =how many liters
October 22, 2010

Calculus
I need help creating an equation for a piecewise defined function with two different rules, that is continuous but not differentiable at the point where the rules change, x=3. Please help to justify the answer.
October 20, 2010

College Chemistry
Write the condensed ground-stste electron configuration of the transition metal ion Mo3+
October 17, 2010

College Chemistry
Draw an orbital diagram showing valence electrons and write the condensed ground-state electron configuration for Se3+
October 17, 2010

College Chemistry
Write the electron configuration for Se using the noble gas core format.
October 16, 2010

math
let d=#dimes 10d=value dimes d-3=#nickels 5(d-3)=value nickels 10d+5(d-3)= 165 total value=$1.65 10d+5d-15=165 distribute 15d-15=165 combine like terms 15d=180 add 15 to both sides d=12 divide both sides by 15 You have 12 dimes and (d-3)nickels or (12-3) nickels which is 9 ...
October 16, 2010

math
Make a chart for the pieces of RT=D that you know. Rate X Time = Distance _____________________________________ ship 30 x 30x chopper 90 x-4 90(x-4) You know that at the time the helicopter overtakes the ship that the distances are equal. 30x=90(x-4) set distances equal 30x...
October 16, 2010

math
twelve posts stand equidistant along the stadium. starting at the first post, a runner reaches the eight post in 8 seconds. if he runs at a constant rate, how many seconds are needed to reach the twelfth post?
October 16, 2010

maths
46-6=40 40 / 2 = 20 20+6= 26
October 16, 2010

english
How can I fix this sentence? some of the questions I asked him are “Tell me reasons why did you end up staying at the hospital?” and “Tell me more about the pain in your right leg?”
October 16, 2010

Chemistry
81.9 degrees
October 15, 2010

Chemistry
What will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?
October 15, 2010

english
thank you! It helps a lot
October 12, 2010

Physics
Michael Jordan, formerly of the Chicago Bulls basketball team, has some fanatic fans. They claim that he is able to jump and remain in the air for two full seconds from launch to landing. Evaluate this claim by calculating the maximum height that such a jump would attain. For ...
October 11, 2010

Physics
A golfer imparts a speed of 32.1 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air? (b) What is the longest "hole in one" that ...
October 11, 2010

chemistry
or 21.075ml?
October 10, 2010

chemistry
so is the answer 1000ml?
October 10, 2010

chemistry
The formula for epsom salt is MgSO4 . 7H20 If 1.250 g of the compound is dissolved in water, calculate the number of milliliters of .200 M Ba(NO3)2 that would be required to precipitate all of the sulfate ions as barium sulfate. I got that right with an answer of 25.4 ...
October 10, 2010

chemistry
what is the experimental percent of sulfate in alum?
October 10, 2010

math
find the equation of the line pasiing throught the given point. Use function notation to write the equation. (-2,11)and(1,-4) f(x)
October 8, 2010

physics
4.4
October 7, 2010

geometry
(12x-15)=(3x+45)
October 6, 2010

ap chemistry
A mixture contains only NaCl and Fe(NO3)3. A .456 gram sample of the mixture is dissolved in water and an excess of NaOH is added, producing a precipitate of Fe(OH)3. The precipitate is dried and filtered, and its mass is determined to be .107 g. The mass of iron in the sample...
October 6, 2010

Chemistry Help
Thank you so much for your help, for the following question i am getting wrong answers answell. for the first one i got 42.7 and the 2nd I got 19.8. Could you help? Thank you for help in advance 4Cr(s) = 3O_2(g) -> 2Cr_2O_3(s) 2Cr(s)+O_2(g)->2SrO(s)
October 5, 2010

Chemistry Help
I have tried usingg the molecular formula, formulas in the text book but my answers dosent match any of the multiple choice answers, can someone help? For each of the reactions shown, calculate the mass (in grams) of the product formed when 10.7 g of the underlined reactant ...
October 5, 2010

College Chemistry-Please help me
I need to find the ionic equation of: 3Ba(OH)2(aq)+2H3PO4(aq)->Ba3(PO4)2+6H20(l) I'm totally lost on this question
October 4, 2010

math
16x^7y^12-10X^5y^8/2x^2y^9 =(16x^7y^12/2x^2y^9)-(10x^5y^8/2x^2y^9) =((16/2)*x^(7-2)*y^(12-9))-((10/2)*x^(5-2)*y^(8-9)) =8x^5y^3-5x^3y^-1 or =(8x^5y^3)-((5x^3)/y)
October 4, 2010

college chemistry
A chemical engineer determines the mass percent of iron in an ore sample by converting the Fe to Fe^2+ in acid and then titrating the Fe^2+ with MnO4^-. A 1.3510 g sample was dissolved in acid and then titrated with 39.32 mL of 0.03190 M of KMnO4. The balanced equation is: 8H...
October 4, 2010

college chemistry
I need to find the ionic equation of: 3Ba(OH)2(aq)+2H3PO4(aq)->Ba3(PO4)2+6H20(l)
October 4, 2010

College Chemistry
What is the oxidation number of (NH4)2SO4
October 3, 2010

College Chemistry
What is the oxidation number of Cr2(SO4)3
October 3, 2010

College Chemistry
I balanced the equation: HBr(aq) +NH3(aq)->NH4Br I need to find the ionic equation and the net ionic equation
October 3, 2010

geometry
mo bisects angle lmn,m angle lmn = 6x-20, m angle lmo= x+32 find m angle nmo but how if i don't know what lmn is From the above info you know lmo=nmo and lmo+nmo=lmn so 2(lmo)=lmn 2(x+32)=6x-20 2x+64=6x-20 2x+84=6x 84=4x 21=x you know lmo=x+32=21+32=53 you also know lmo=...
October 3, 2010

College Chemistry
Sodium hydroxide is used extensively in acid-base titrations because it is a strong inexpensive base. A sodium hydroxide solution was standardized by titrating 27 mL of 0.1628 M standard hydrochloric acid. The initial buret reading of the sodium hydroxide was 2.44 mL, and the ...
October 3, 2010

college chemistry
You are given solutions of HCl and NaOH and must determine their concentrations. You use 38 mL of NaOH to titrate 100 mL of HCl and 23.2 mL of NaOH to titrate 50 mL of 0.0782 M H2SO4. Find the unknown concentrations.
October 3, 2010

Math
[(8*2)- 13]^3+(4-1)^2+4-2*3+|3|-|-6|=? [16-13]^3+(3)^2+4-2*3+3-6 [3]^3+9+4-6+3-6 27+9+4-6+3-6 36+4-6+3-6 40-6+3-6 34+3-6 37-6 31
October 3, 2010

composition and communication
I need help identifying verb tanses. I have to write 5 sentences about the " role education plays in successful financial planning" using different verb tenses. This is what I have: 1. Education plays an important role in a person’s financial status. (PRESENT ...
October 3, 2010

chemistry
Determine the oxidation state for the second element in SO3
September 30, 2010

chemistry
so what wouldit be for Mg3P2? if it has a subscript?
September 30, 2010

chemistry
Determine the oxidation state for the SECOND element in each of the following: NaF _____ Could you give me the steps to determine the answer
September 30, 2010

geometry
A thin wire is formed into a rectangle with an area of 24 cm2. If it is reshaped so that the 6 cm side is 2 cm longer, how will the area change?
September 27, 2010

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