Thursday

June 30, 2016
Total # Posts: 1,463

**organic chemistry**

how do you increase the yield of triphenylmethanol in a grignard reaction?
*March 8, 2010*

**organic chemistry**

how do you increase the yield of triphenylmethanol in a grignard reaction?
*March 8, 2010*

**AP Physics**

angular momentum (L) = Inertia (I) * angular velocity (w) Using conservation of angular momentum (L): Inertia initial total (Ii) * angular velocity initial (wi) = Inertia final total (If) * angular velocity final (wf) Inertia of disks (such as the merry-go-round) = .5 * mass (...
*March 4, 2010*

**chemistry**

I am doing stoicheometry and I need help. Is there anyone who knows about it? It's in my chemistry class. HELP! I am in tears and cannot figure this out.
*March 2, 2010*

**chemistry**

if you started with 2.154g of aluminum, how many grams of aluminum oxide would you get?
*March 1, 2010*

**chemistry**

how many grams of magnesium is needed to produce 2.154g of magnesium nitrate?
*March 1, 2010*

**UW Lacrosse**

if you started with 2.154grams of al, how much of product of aluminum oxide would you expect?
*March 1, 2010*

**Quick Math Check**

Graph x+4y=16 using slope. y= -1/4x+4 the slope would be -1/4 and the y intercept is 4?
*February 26, 2010*

**6th grade math**

No because similar objects are congruent. Congruent figures are the same size and the same shape.
*February 24, 2010*

**brother:mother::fly:**

This isn't a question but those of you who are having troubles with brother:mother::fly: the answer is spry. It's a word but I didn't know it was a word until my parents gave me the answer LOL but this was a very handy site considering the fact I had the same one ...
*February 23, 2010*

**calculus**

Find the volume of the solid formed by rotating the region enclosed by y=e^(3x)+2, y=0, x=0, and x=.2 about the y-axis
*February 17, 2010*

**calculus**

Find the volume of the solid formed by rotating the region enclosed by y=e^(3x)+2, y=0, x=0, and x=.2 about the y-axis
*February 17, 2010*

**calculus**

Find the volume of the solid formed by rotating the region enclosed by y=e^(3x)+2, y=0, x=0, and x=.2 about the y-axis
*February 17, 2010*

**social studies**

Approximately what percentage of Th Colonial population were patriots, neutral, loyalists?
*February 15, 2010*

**geography**

can you give me examples of countries in stage 2(early expanding) and 3(late expanding) in the demographic transition cycle ???? thank you rachel
*February 2, 2010*

**chemistry**

CH3OH(g) CO(g) + 2 H2(g) H = +90.7 kJ . Calculate the amount of heat transferred when 35.0 g of CH3OH(g) are decomposed by this reaction at constant pressure
*January 29, 2010*

**Algebra**

i need help with graphing inequalities ex: y < 4 + x
*January 28, 2010*

**statistics**

Im a fat cheatercheater
*January 25, 2010*

**math**

A basketball team has won 50 games of 75 played. The team still has 45 games to play. How many of the remaining games must the team win in order to win 60% of all games played during the season?
*January 21, 2010*

**lit**

what word best describes ha mercedes and charles? sensitive frightened prepared or inexperienced
*January 21, 2010*

**Social Studies**

What Florida County did the seminole indians fight over against the american colonists? A) Seminole B) Highland C) Dixie D) Osceola
*January 20, 2010*

**algebra 1**

What is the third term of a recursive sequence that follows the pattern x - 7 and has a first term x = 100? May somebody explain the answer and how they got it? Thank you so much
*January 16, 2010*

**To: Writeacher**

Ok thanks for the update I'll be back on here later to check.
*January 15, 2010*

**For all teachers**

Does anyone know if Sra will be on here today because I really need her to check my french.
*January 15, 2010*

**French**

Could you check these thanks Directions: Answer as indicated, using the pronoun en. Part 1 1. Tu as de l'aspirine? Answer: Oui, j'en ai. 2. Tu as du sirop? Answer: Non, je n'en ai pas. 3. Tu as des médicatments? Answer: Non, je n'en ai pas. 4. Tu as de ...
*January 15, 2010*

**diagramming a sentence**

is book old
*January 14, 2010*

**Bible (fill in the blank)**

1. God can use us to GROW spiritually and bring GLORY to Himself. 2. Ethical, doctrinal, numerical, and factual variances and parallel passages are categories of alleged ERRORS in the Bible. 3. JESUS CHRIST is the incarnate Word of God. 4. The Bible gives us clues about the ...
*January 11, 2010*

**science**

explain why certain bugs can walk on water
*January 4, 2010*

**Sciece**

What is the pronunciation rebus for nitrogen?
*December 31, 2009*

**English**

You could say this: I cheat because I use a website on the internet to get the answers.
*December 31, 2009*

**math**

The lowest score the student could make on the last paper and still get an A is 97%. So all the test scores would be: 92, 83, 88, and 97.
*December 30, 2009*

**English 2 honors quick question**

I have a final in this class tomorrow and I need a free online practice test. Somethings we have learned our poetry terms, (sonnet, lyrical, haiku, simile, metaphor, hyberbole etc..) We have also read the story Antigone, Pit and the Pendulum, Witness for the prosecution. Thanks:)
*December 17, 2009*

**Biology quick please**

I need a practice biology test to practice for my final exam which is tomorrow. I'm a tenth grader and the things we learned were mitosis, meiosis, production of gametes, human reproduction, cell devision, mendelian genetics, probablitity of inheriting traits, dna, and ...
*December 15, 2009*

**Calc./ Physics**

when apollo 15 astronaut David Scott dropped a hammer and a feather on the moon to demostrate that in a vacuum all bodies fall with the same (constant) acceleration, he droppes them from 4 feet above the lunar surface. the television shows them fallen more slowly than on earth...
*December 9, 2009*

**history**

Well, either way, was it true that if people gave names then they would be let off the hook?
*December 8, 2009*

**history**

I know that during the McCarthy Era, people accused as being communists were asked to give names of other communists. I was wondering if it was true that if accused people gave names then they would be let off the hook? Thanks.
*December 8, 2009*

**French**

Could you please check this also thanks Directions: L'Alsace, vous connaissez? Complete with the correct form of connaître or savoir. Karen et Melissa vont en France. Elles vont visiter l'Alsace. Elles ------------------(connaissent) assez bien Paris, mais elles ...
*December 2, 2009*

**French**

could you please check these thanks Directions: Connaître et savoir: Rewrite the following sentence with each pronoun and make all necessary changes. Use this model for each sentence Je connais Marie et je sais qu'elle est française. 1. Il...
*December 2, 2009*

**World History quick question**

What kind of picture/symbol would you draw for principle of intervention?
*December 1, 2009*

**hellllp physics**

A solid cylinder rolls along the floor. What is the ratio of it's translational kinetic energy to its rotational kinetic energy about an axis parallel to its length and through its center of mass?
*November 24, 2009*

**Physics help**

A solid cylinder rolls along the floor. What is the ratio of it's translational kinetic energy to its rotational kinetic energy about an axis parallel to its length and through its center of mass?
*November 24, 2009*

**Wolrd Geography**

Possible answer: The acculturation that brings negative effects might involve Country A imposing its language, religion(s), methods of education, system of government, social customs, etc. upon Country B, despite the will of the people to retain their own cultural traditions ...
*November 24, 2009*

**MATH**

Could someone please double check me? ------------------------------------------ A Developer works 40 hours per week at $30 per hour. He or she earns : 40 hours x $30.00 per hour = $1200.00 - per week. The four developers earn : 40 hours x $1200.00 = $4800.00 - per week...
*November 23, 2009*

**momentum**

i tried that, but i'm not getting the answer right i did disk momentum=Iw and boy momentum=m*rpm*2pi/60 then i set those two equal to each other and then changed the w back to rpm, but i'm not getting the right answer.
*November 20, 2009*

**momentum**

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 230 kg and a radius of 1.6 m. A 38- kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.15rpm. If the...
*November 20, 2009*

**Physics**

can somebody explain how to do this problem without changing it to radians? the final answer has to be in rates per minute
*November 19, 2009*

**Physics**

i tried the technique that was posted on there, but the answer was wrong. and my answer is supposed to be in RPM.
*November 19, 2009*

**Physics**

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 240 kg and a radius of 1.4 m. A 33- kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.20rpm. If the...
*November 19, 2009*

**u.s. history**

thanks for the help
*November 18, 2009*

**u.s. history**

Why did Northerners oppose slavery? Thanks.
*November 18, 2009*

**Physics**

A pulley with a rotational interia of 4.4*10^-3 kg m^2 about its axle and a radius of 6 cm is acted on by a force applied tangentially at its rim. The force magnitude varies in time as F=0.32t + 0.27t^2 where F is in newtons if t is given in seconds. The pulley is initially at...
*November 16, 2009*

**spanish**

thanks :)
*November 14, 2009*

**spanish**

Hi, can someone please tell me the english translations of these words? thanks no gastar, suscribirse, and transferir
*November 14, 2009*

**General Physics**

You use the formula: 1/2mv^2= 1/2kA^2
*November 12, 2009*

**algebra-linear equations**

The combined cost of one advance ticket and one same-day ticket to a show was $50. It is known that 35 tickets were sold in advance and 25 the same day, for total receipts of $1600 . What was the price of each kind of ticket?
*November 10, 2009*

**Algebra**

6a-3b
*November 10, 2009*

**Physics**

Please Help ! A child throws a snowball at a tree and it sticks to the tree. Does this motion defy the Law of Conservation of Momentum? Explain. The Law of Conservation of Energy states: "If there is no net force acting on a system of objects, the total momentum in that ...
*November 9, 2009*

**Physics**

If a 40 kg brick and a 400 kg brick each dropped from 1 m above a trampoline, find the lowest position of each brick. Assume the trampoline is a simple spring obeying Hooke's law with a k value of 12 000 N/m. So, I used mg(h+x)=1/2 k x^2 then solved for x in each case. ** ...
*November 6, 2009*

**math**

Cost= $10.00 for the belt $33.00 for the socks ($3.00 x 11) $3.00 for shipping 10+33+3= $ __________
*November 6, 2009*

**Physics**

you lost be. k= 12 000 N/m where are you getting 1 or 10
*November 6, 2009*

**Physics**

and how do i solve for x when it is on oth sides of the eq'n?
*November 6, 2009*

**Physics**

pe= potential energy?
*November 6, 2009*

**Physics**

okay, but what is the start of that eq'n? It looks similar to Eg=Ek ?
*November 6, 2009*

**Physics**

If a 40 kg brick and a 400 kg brick each dropped from 1 m above a trampoline, find the lowest position of each brick. Assume the trampoline is a simple spring obeying Hooke's law with a k value of 12 000 N/m. I know i must use Fs= kx, but where do I start? Do i find Fg at ...
*November 6, 2009*

**science**

A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.2 m/s2. At the same instant, a car passes the truck going 12 m/s. Where and when does the truck catch up with the car?
*November 4, 2009*

**Physics**

ok i figured out what I did wrong for the (a). I also found (b). But I cannot seem to get the right answer for the kinetic energy lost in the collision.
*November 3, 2009*

**Physics**

I used the equation m1vf-m1vi=-m2vf+m2vi and got a velocity of 4.77m/s but that answer is incorrect. Am I not using the right formula for question (a)?
*November 3, 2009*

**Physics**

A barge with mass 1.7×105 kg is proceeding down river at 6.1 m/s in heavy fog when it collides broadside with a barge heading directly across the river. The second barge has mass 2.83×105 kg and was moving at 4.2 m/s. Immediately after impact, the second barge ...
*November 3, 2009*

**Maths**

start by multiplying by the lowest common denominator (in this case 4), simplify, then solve. 4(x/2) + 4(x/4)= 1 4/2=2 and 4/4 =1, therefore: 2x + x = 1 3x = 1 (3x)/3 = 1/3 x= 1/3
*October 30, 2009*

**Physics **

A pilot of mass 65 kg in a jet aircraft makes a complete vertical circle in mid-air. The vertical circle has a radius of 1.70 km at a constant speed of 215 m/s. Determine the force of the seat on the pilot at (a) the bottom of the loop and (b) the top of the loop. (Note that ...
*October 29, 2009*

**math**

wait, number two is wtong.. sorry!! 2. 2x-y=1 plug in 2 and 3.. 2(2)-3=1 4-3=1 1=1 so yes, (2,3) is the solution to the problem ((:
*October 26, 2009*

**math**

3x+4y=18 you just plug in 2 and 3.. 3(2)+4(3)=18 6+12=18 18=18 so yes, (2,3) is the solution for the first problem. 2x-y=1 again, plug in 2 and 3.. 2(2)-1=1 4-1=1 3=1 so no, it's not the solution for the problem hope I helped!
*October 26, 2009*

**French**

Can you please check these also Directions: Rewrite each sentence in the negative. 1. Il dit quelque chose à son copain. Answer: Non, il ne dit rien à son copain. 2. Et son copain écrit quelque chose. Answer: Et son copain n'écrit rien. 3. Il ...
*October 26, 2009*

**French**

Can you check these... Directions: Répondez que non Part I 1. Ta grand-mère travaille encore? Answer: Ma grand-mère ne travaille plus. 2. Ta soeur joue encore a foot? Answer: Ma soeur ne joue plus au foot. 3. Tu écris encore à ton amie Marie...
*October 26, 2009*

**English-interpreting quote**

What does this quote mean? "In the end, our society will be defined not only by what we create, but by what we refuse to destroy." I'm supposed to keep in mind the depetion of our ocean resources..
*October 25, 2009*

**algebra[please check]**

in questions 1 and 2, write an equation of the line in slope-intercept form. 1. the slope is -4/3; the y-intercept is -2. 2. the slope is 0; the y-intercept is -5. my answers: 1.y=-4/3-2 2. y=-5 ______________________ write an equation of the line that passes through the point...
*October 25, 2009*

**Physics**

Suppose that in the same Atwood setup another string is attached to the bottom of m1 and a constant force f is applied, retarding the upward motion of m1. If m1 = 5.30 kg and m2 = 10.60 kg, what value of f will reduce the acceleration of the system by 50%? thank you!
*October 24, 2009*

**algebra**

you are driving at a speed of 55 miles per hour to your sister's house. at 1pm, you are 150 miles from her house. write an equation that models the distance from you sister's house in terms of the number of hours since 1pm.
*October 24, 2009*

**Physics**

A 45 kg trunk is pushed 7.8 m at constant speed up a 30° incline by a constant horizontal force. The coefficient of kinetic friction between the trunk and the incline is 0.23. a)Calculate the work done by the applied horizontal force. b)Calculate the work done by the ...
*October 23, 2009*

**algebra 2**

2x+y=5 in slope form
*October 20, 2009*

**algebra 2**

ghngh
*October 20, 2009*

**Chemistry**

the heat of combustion of propane is -5.47MJ/mol. there is 1.50kg of propane available to burn. how many litres of water could be heated from 18.0 degrees Celcius to 63.0 degrees Celcius using the heat from the burning propane. assume that all heat lost by the propane reaction...
*October 20, 2009*

**algebra**

Write an equation in slope-intercept form of the line that passes through the given points: (-1/2,-1), (3,5/2). Also, write an equation in point-slope form of the line that passes through the given points: (6,-3), (-1,9). <soo sick of these.. please help!> thanks!
*October 19, 2009*

**algebra**

okay.. i get it i misunderstood your post.. thanks a lott xxx (=
*October 18, 2009*

**algebra**

I'm feeling horrible for not being able to do this. [I am the old rachel :(] could you explain it again? <ashamed>
*October 18, 2009*

**algebra**

write the equations in standard form of the horizontal and vertical lines that pass through the point 1. (2,4) 2. (-5, 4)
*October 18, 2009*

**algebra**

[<equationing (which isn't a word!)> hehe] thanks for the help! :)
*October 18, 2009*

**algebra**

write a linear equation to model the situation. you have walked 4 miles on a trail. you continue to walk at a rate of 3 miles per hour for 5 hours. please tell me how to do this!! thanks!
*October 18, 2009*

**algebra**

Thsnks again!! (=
*October 18, 2009*

**algebra**

1. write an equation of the line that passes through the point and has the given slope. write the equation in slope-intercept form. a. (3,2), m=1/2 b. (-3,2), m=1/2 _______ answers: a. y=1/2x + 1/2 b. y=1/2x + 7/2 ______________________________________ 2. write an equation of ...
*October 18, 2009*

**algebra 1**

write an equation in slope-intercept form of the line that passes through the points: 1. (-5,3), (4,-5) 2. (-1/2,-1), (3,9/2) _____ my answers: 1. y=-8/9x-5 2. y=3/7x+5/2 please check.. thnx
*October 16, 2009*

**world history**

compare in north america blacks and whites compare in latin america/carribean natives and foriegners and compare people or higher and lower status and compare free people to enslaved people
*October 4, 2009*

**Math**

When you walk around a polygon, at each vertex you need to turn either right (clockwise) or left (counterclockwise). A turn to the left is measured by a positive number of degrees and a turn to the right by a negative number of degrees. Find the sum of the measures of the turn...
*September 29, 2009*

**social studies**

what is a delta plain
*September 26, 2009*

**science**

dont know
*September 3, 2009*

**geometry**

a. If BC = 2x + 1, CD = 3x - 4 and BD = 22, find the value of x. b. Using the value of x, find BC and CD.
*August 30, 2009*

**4th grade math**

thirty six buses would be needed to carry the passengers and crew off three 747 jumbo gets. heres the question: how many buses fo one jet two jets. and how many jets for 180 buses and 252 buses and how many jets would be needed to carry the passengers on 264 buses
*August 25, 2009*

**French**

Thank you so much for all your help.
*August 23, 2009*

**French**

Directions: I wrote a paragraph saying my name, how old I am, my nationality, my hair color, eye color, what I like/not like to do, and 2 things about me. Could you please check my spelling, punctuation, ect.. and could you please give me a letter grade (I'm in 10th grade...
*August 23, 2009*

**Algebra**

How do I solve this multi variable equation for all the values of x and the value of r-s? 4x^2+20x+r=(2x+s)^2
*August 18, 2009*