Saturday

April 30, 2016
Total # Posts: 1,337

**Chemistry**

A 300 Calorie donut is used to heat 5.0 kg of water. If the initial temperature of the water is 20 degrees C what will the final temperature of the water be? Assume no heat loss to the surroundings
*March 11, 2009*

**Chemistry**

The heat energy of ethanol is 29800J/g. A 355g can of beer contains 3.70% ethanol by mass. How many ethanol calories are in a can of beer?
*March 11, 2009*

**math**

Please help! cot (2ɵ/3)= - square root of 3
*March 10, 2009*

**math**

how do I solve? sin (3ɵ + ð/18) = 1
*March 10, 2009*

**math- precalculus**

ok thank-you. i figured it out
*March 4, 2009*

**math- precalculus**

Can someone help me with this problem please? Thank-you to those who helped me with the previous ones and I understand those. But, I tried this one and I don't understand it. Use the information given about the angle Ɵ to find the exact value of: sin 2Ɵ. 1) sec&#...
*March 4, 2009*

**math- precalculus**

Can someone help me with this prolem please? Use the information given about the angle Ɵ to find the exact value of: sin 2Ɵ. 1) cosƟ= 3/5, 0 < Ɵ < (π/2)
*March 4, 2009*

**math- precalulus**

Can someone help me with this prolem please? Use the information given about the angle Ɵ to find the exact value of: sin 2Ɵ. 1) sinƟ= 3/5, 0 < Ɵ < (π/2)
*March 4, 2009*

**chemistry**

what is the difference between the combined gas law and the ideal gas law? are they the same thing?
*March 2, 2009*

**chemistry**

How do I figure this out? If argon diffuses at a rate of 15, what rate does krypton diffuse at?
*February 26, 2009*

**science**

barnacles, rockweeds, smooth periwinkles ------> A) splash zone green sea urchins, sponges, brittle starfish -------> B) middle shore rough periwinkle, algae -------> C) lower shore patches of lichens -------> D) upper shore
*February 25, 2009*

**MATH**

HOW DO U FIND THE UNIT RATE?
*February 23, 2009*

**math**

please help me solve: (1-cos^3ө)/(1-cosө) - cos^2ө-1
*February 22, 2009*

**math**

I don't understand how to do these particular ones? can someone help? I get the basic steps but I always get stuck. (sin^2ө- Tan^2ө)/ (1-sec^2ө) (secө-Tanө)^2 (1+sinө)-1
*February 22, 2009*

**math**

i know but how do you multiply it out?
*February 21, 2009*

**math**

how would this multiply out (1/cosө) (Sin^2ө + cos^2ө/cosө * sinө)
*February 21, 2009*

**12th grade**

whick is a positive connotaion of the word inactive? a)lazy B)passive C)relaxed d)slacked
*February 20, 2009*

**what number am i**

i am a three digit number iam less than 200 i am divisible by 12 and by 9 my units digit is less than my tens digits
*February 19, 2009*

**math**

how do I simplify? (secө/ (secө-tanө)) - secөtanө
*February 12, 2009*

**math**

(1-2cos^2ө)/ (sin ө-cosө) + cotө how do I simplify this??? Thank-you for your help!
*February 10, 2009*

**math**

It is the sins, cos, etc of theta
*February 10, 2009*

**math**

how do I simplify these? 1. (Cot/1-tan) + (Tan/1-Cot) - Tan - Cot 2. (1+cos) (csc-cot)
*February 10, 2009*

**prepositions and their objects**

Some of the construction crew built a scaffold near the tower.
*February 9, 2009*

**math**

how do I solve this? (cos ө+1)/ (cos ө - 1) The answer is supposed to be: (1 + sec ө)/ (1- sec ө)
*February 8, 2009*

**math**

how do I solve these? (Tan^2ө)(Cos^2ө)+ (cot^2ө)(sin^2ө) The answer is supposed to be one but I dont know how to get it. 9sec^2ө - 5 tan^2ө The answer is supposed to be 5+4sec^2ө
*February 8, 2009*

**math help**

2.5p=.5p+4 divide both sides by .5 p. You will be left with 5p=4 Divide 4 by 5 so the answer is p=4/5
*February 7, 2009*

**english**

is another one in the fourth grade when Mr. Schulter tells him he should be a doctor but he questions her idea. Then he goes home and practices calling himself Doctor Victor? Also, I dont understand why the essay is set up using headings like First grade, second grade, etc? It...
*February 7, 2009*

**english**

can someone help me with this question?At several points in Sherman Alexie's "Indian Education" essay, Alexie uses comparison and contrast. Locate at least two examples and explain what each contributes to the essay? I just dont see a point of comparison and ...
*February 7, 2009*

**english**

i dont know how to get it to work. the essay is online..can someone help? 29 But it felt good, that ball in my hands, all those possibilities and angles. It was mathematics, geometry. It was beautiful. 31 But it felt good, that buzz in his head, all those colors and noises. It...
*February 7, 2009*

**english**

FIFTH GRADE 1. I picked up a basketball for the first time and made my first shot. No. I missed my first shot, missed the basket completely, and the ball landed in the dirt and sawdust, sat there just like I had sat there only minutes before. 29 But it felt good, that ball in ...
*February 7, 2009*

**english**

This is a passage from Indian Education. I dont understand what to write for this question: Notice the similarities between the pairs of sentences composing paragraphs 29 and 31 and paragraphs 70 and 72, what point does Alexie make with the similarities? FIFTH GRADE 1. I ...
*February 7, 2009*

**psychology**

I think it is C
*February 7, 2009*

**chemistry**

the system side of an open u-tube manometer is 48 mm lower than the open side. What is the pressure of the system?
*February 6, 2009*

**before 1900 arts**

1. David’s Napoleon Crossing the Saint-Bernard treated contemporary history as : a. a documentary b. Grand Manner c. Grand Salon d. neutral i believe it is grand salon, as after this painting most were rejected due to standards. 2. Francisco Goya was a romantic painter ...
*February 5, 2009*

**math**

At what point do the graphs of the following equation intersect: 8x-5y=11 and 4x-3y=5...?
*February 4, 2009*

**Science**

Write a theory and hypothesis. Define the concept and then state how you would measure the concept. Can you show me an example of one so I know what to look for when taking my test. Thank You
*January 29, 2009*

**Geometry**

m angles mnp=23 degrees
*January 28, 2009*

**puzzle (math, psychology)**

You have 3 measuring spoons. Spoon A is filled with 8 tsps of salt. Spoon B and C are both empty; Spoon B can hold 5 tsps and Spoon C can hold 3 tsps. Divide the salt among the spoons so that spoon A and spoon B each have exactly 4 tsps of salt and spoon c is empty.
*January 27, 2009*

**math, psychology, puzzle**

You have 3 measuring spoons. Spoon A is filled with 8 tsps of salt. Spoon B and C are both empty; Spoon B can hold 5 tsps and Spoon C can hold 3 tsps. Divide the salt among the spoons so that spoon A and spoon B each have exactly 4 tsps of salt and spoon c is empty.
*January 27, 2009*

**math, psychology, puzzle**

you have a 5 minute hourglass and a 9 minute hour glass. How can you use them to time a 13 minute barbeque?
*January 27, 2009*

**biology**

what would happen if you treated a protein (containing 3 S-S bonds) with urea and mercaptoethanol? I know that the urea breaks hydrogen bonds and that the mercaptoethanol reduced disulfide bonds but what levels of the protein would be affected?
*January 26, 2009*

**biology**

what would happen if you treated a protein (containing 3 S-S bonds) with urea and mercaptoethanol? I know that the urea breaks hydrogen bonds and that the mercaptoethanol reduced disulfide bonds but what levels of the protein would be affected?
*January 26, 2009*

**math**

how do i find 3/4 of 8 another question says find 3/8 of 1/4
*January 25, 2009*

**algebra**

factor: 9w - w^3 = 3w(3-w^2) m^4 - n^4 = (m-n)^2(m-n)^2 are these correct? the next few I wasn't sure how to work... factor: 2h^2 - h - 3 = 0 x^2 - 36 = 0 x^3 = 4x
*January 24, 2009*

**Home School. PLEASE HELP ME!!**

Once again i didnt get a book so im having trouble. I tried my best on the ones i answered..if i got any wrong please tell me and correct them for me please! Thanks so much :) 1. According to Jean Piaget, in what is all learning based? A. Sensorimotor learning (my answer) B. ...
*January 19, 2009*

**history**

who was against jacksons indian removal act (like what groups of people or states) besides the indians themselves?
*January 18, 2009*

**math**

also this one: f(x)=5(the square root of x-3)
*January 13, 2009*

**math**

how do you find the equations inverse and the domain of the inverse f(x)= 4x^2 -5
*January 13, 2009*

**WORLD HISTORY EXAM 3 HELP PLEASE?!?**

I ANSWERED SOME OF THEM BUT I DONT KNOW IF THERE RIGHT OR WRONG..CAN YOU HELP ME? I DONT HAVE THE BOOK TO HELP.. THANKS SOO MUCH!! 1. The term superman or supermen was developed by..? a. Nietzsche (my answer) b. Marx c. Hegel d. Mann 2. The novel Les Miserables was written by...
*January 9, 2009*

**SKILLS FOR THE EFFECTIVE TEACHER AIDE**

THIS ISNT FOR THAT..IM NOT TRYING TO BE A TEACHER AIDE. ITS A CLASS IM TAKING IN SCHOOL. IF THIS WAS SOMETHING I WANTED IN MY FUTURE I WOULDNT BE ASKING FOR ANSWERS! IF YOU CANT HELP ME THEN DONT POST NOTHING
*January 9, 2009*

**SKILLS FOR THE EFFECTIVE TEACHER AIDE**

ITS HOME SCHOOL..I DIDNT GET A BOOK IN THE MAIL..AND IM NOT PAYIN FOR 20$ TO GET ONE! THANKS FOR YOUR HELP..PSHH
*January 9, 2009*

**SKILLS FOR THE EFFECTIVE TEACHER AIDE**

I need help! I dont have the book to help me..i tried to answer some and if i got them wrong please help and correct them for me! Thanks :) 1. What is active listening? A. Interrupting the speaker with questions B. Listening attentively and asking clarifying questions C. ...
*January 9, 2009*

**Introduction To Teacher Aide**

Ok i need help please! I dont have the book to help me so can someone please help me! I did my best to answer some..if i got them wrong please correct them for me... Thanks :) 1. Which of the following might be a duty of a noninstructional aide? A. Accompany a child to and ...
*January 9, 2009*

** 9th grade English**

subordinating conjunction = the subordination that occurs when a conjunction makes one linguistic unit a constituent of another a conjunction (like `since' or `that' or `who') that introduces a dependent clause correlative conjunction = In grammar, a conjunction is...
*January 9, 2009*

**math**

Is this suppose to be something like.. (a-4 b-6) a+b= ? If so then it equals 10 cause 4+6=10
*January 8, 2009*

**math- logarithms**

how do i solve these logs? log1/2 (3x+1)^1/3= -2 3^(x^3)= 9^x
*January 8, 2009*

**math**

how do i solve these logs? log1/2 (3x+1)^1/3= -2 3^(x^3)= 9^x
*January 8, 2009*

**math**

how do i solve this logarithm log(base 9)X + 3log(base 3)X = 14
*January 7, 2009*

**chemistry**

I thought that Cl always needed to have a 2 after it
*January 7, 2009*

**chemistry**

but i thought that Cl always had to have a 2 after it.
*January 7, 2009*

**chemistry**

How do I balance this equation for silver nitrate and sodium chloride reacting to form sodium nitrate and silver chloride. AgNO3 + NaCl = AgCl2 + NaNO3
*January 7, 2009*

**ALCOHOLIC BEVERAGES**

THERES ONLY A FEW THAT I DONT KNOW...PLEASE HELP!!! 5.If you're looking for a light, versatile, red wine to make a simple pasta with basil and tomatoes, a good choice whould be..?? A.Pinot Grigio B.Cabernet Savignon C.Chianti D.Monks 7.Sapana and jim discussing Amercian ...
*January 6, 2009*

**science**

how do you keep your body from being crushed by air pressure?
*January 6, 2009*

**SOCIAL STUDIES**

wHAT KIND OF PEOPLE LIVED IN THE EAST COAST OF NORTH AMERICA IN THE LATE 1600'S OR EARLY 1700'S?
*January 5, 2009*

**Math**

aflyerquacker,it was on my homework today :)
*January 5, 2009*

**Health**

In what year did Minnesota passedthe first state law requiring buisness,restaurants, and other institutions to establish no-smoking areas??
*December 18, 2008*

**math**

If u look at the question carefully it says about how many which means estimate!!!😄😄
*December 17, 2008*

**math**

You divide by 2 and get 1146,513,785 and a remainder as 1. But the thing that I dint get is that it say how many people will live within between that distance??? So maybe we have to estimate the number we just got from dividing and that is our answer.
*December 17, 2008*

**Economics**

What are the principles of economics invloved in producing price floors + cielings?
*December 16, 2008*

**science**

What did Rutherford's gold foil experiment give proof of?
*December 13, 2008*

**history**

i have to write a paper about why lincoln was a better president than george washington. What were some of george washingtons mistakes and how could lincolnn be better?
*December 12, 2008*

**math**

how do i solve this? sin of 30 degrees - cos of 45 degrees
*December 12, 2008*

**english**

is a female counterpart the nickname for a person's wife?
*December 10, 2008*

**math**

the minute hand of a clock is 6 inches long. how far does the tip of the minute hand move in 15 minutes? what is the circumference of a circle with radius of 6 in? It is 12 pi What fraction of a circle does the minute hand move in 15 minutes? It is 90 degrees So what do I do ...
*December 8, 2008*

**math**

i dont get it?
*December 8, 2008*

**math**

the minute hand of a clock is 6 inches long. how far does the tip of the minute hand move in 15 minutes?
*December 8, 2008*

**science**

what are the role of the electrons in ionic bonds,covalent bonds and metallic bonds
*December 3, 2008*

**precalculus**

how do i solvethis equation (btw we are studyinglogarithms) 3^(x^3)=9^x 2^x=10 (4^x)-(2^x)=0
*December 1, 2008*

**english**

im trying to say that while Douglass can tell the reader how he feels, actually knowing how it feels to be isolated makes his situation more meaningful ...is that the right way to put it because I'm not sure if it makes the situation more meaningful or is there a better ...
*November 28, 2008*

**english**

ok thank-you. I also dont understand why Douglass keeps saying " them be placed in my situation" because that is the only way they will understand his situation. What is he causing the reader to do?
*November 28, 2008*

**english**

is there a mention of sea monsters in the Bible as in the context of this paragraph: it says "monsters of the deep" toward the end of the paragraph it is from frederick douglass' narrative I have been frequently asked how I felt when I found myself in a free ...
*November 28, 2008*

**math**

How do I do this also: write the expression as a single logarithm 21 log (base 3)time the cube root of x + log (base 3) * 9x^2 - log (base 5)25
*November 24, 2008*

**math**

solve with logs 3^(1-2x)=4^(x)
*November 24, 2008*

**english**

thanks but i tried that, i know how to use google. i couldn't find anything
*November 24, 2008*

**english**

can someone help me find examples of ethos, pathos, and logos in this from frederick douglass (rhetorical strategies). I think an example of pathos is when he says: "one must needs experience it, or imagine himself in similar circumstances. Let him be a fugitive slave in ...
*November 24, 2008*

**math**

how do i solve this using logarithms: 1) 4^(x)=8 2) 2^(x) * 8^(-x)= 4^(x)
*November 24, 2008*

**biology**

who discovered the cell theory? What are the 3 parts of the cell theoy?
*November 24, 2008*

**Chemistry**

I think I just figured out what my teacher would do if I asked him how to do this; he would laugh. If I'm not mistaken, you can only draw Born-Haber Cycles for ionic compounds. P2S5 is covalent, so it's impossible. Any input? Is that true?
*November 23, 2008*

**Chemistry**

I appreciate your help, but I've got several examples already. Drawing a Born-Haber Cycle for NaCl seems to be very different from drawing one for P2S5. I don't understand how to use the IE's (Ionization energies), especially because both P ions and S ions would ...
*November 23, 2008*

**Chemistry**

How do I draw a Born-Haber Cycle for diphosphorous pentasulfide? Formula: P2S5, but you knew that! Thanks in advance!
*November 23, 2008*

**math please help**

a.Find a winning strategy if the game begins with 15 counters in the pile. b.Find and explain the winning strategy if the game begins with 35 counters in the pile. c.Find and explain the winning strategy if the game begins with any number counters in the pile.
*November 21, 2008*

**math please help**

Hint: suppose the numbers in your set were 1,3. Then work “backwards” from the lowest numbers to see what are the winning and losing positions. For example, in this case, 1 would be a winning number since that player could remove 1 counter. 2 is a losing number, ...
*November 21, 2008*

**math please help**

You will be given a set of numbers to play this game. Two players start with a pile of counters and take turns choosing numbers from their set (repeats are allowed) to remove from the pile. The first person to leave 0 counters wins. For example, if you are given numbers 1,2,3,...
*November 21, 2008*

**math**

the population of a southern city follows the exponential law. If the population doubled in size over an 18 month period and the current population in 10000, what will be the population 2 years from now? the equation for the exponential equation is: A=ao e ^ -kt ao is the ...
*November 21, 2008*

**Physics center of gravity**

a uniform bridge span weighs 50000N and is 40m long. An automobile weighing 15000N is parked with its center of gravity located 12m from the right pier. What upward support does the left pier provide?
*November 21, 2008*

**chemistry**

B2^2- di other two para
*November 19, 2008*

**algebra**

2x=c-b x=(c-b)/2
*November 18, 2008*

**english**

i need ideas on why tape recording someone without their knowledge is wrong and immoral. i already have right to privacy (the fourth amendment)
*November 18, 2008*

**english**

i need ideas on why tape recording someone without their knowledge is wrong and immoral.
*November 18, 2008*

**8th grade science**

what are the role of the electrons in ionic bonds,covalent bonds and metallic bonds?
*November 18, 2008*