# Posts by Rachel

Total # Posts: 1,592

ochem
What's an equation of the hydrolysis of one ester group in tannins by CaCO3?

chemistry
how would longer roasting time of green coffee beans effect its caffeine content? why?

How many grams are in 2.7 mol of table salt, NaCl (molar mass of NaCl=58.44 g/mol)?

trig
The function d=-8cos2t describes a simple harmonic motion, where d is the distance(in meters) an object travel in t seconds. What is the frequency?

trigonometry
The function d=11cos6t describes a simple harmonic motion, where d is the distance(in meters) an object travels in t seconds. What is the time required for one complete cycle?

Global Studies
I have to write a story taking place in Eastern Asia. I've decided to write about a South Korean exploring life in North Korea. Would they need to sneak in or are they permitted to go?

Math
1. sin (teta) / cot (teta) + cos (teta) = sec (teta) --> sin (teta) divide 1 / tan (teta) + cos (teta) I'm stuck now because i don't know where to go from here

chemistry
how much CO2 can be produced if 100 g glucose is allowed to react with 100 g O2? which is the limiting reactant, oxygen pr glucose?

biology
Honeybees are asexual because not only do I check the websites for facts but also my textbook. thanks for the search engine but i wanted environmental conditions for asexual and sexual reproduction but i found some good websites. Thanks alot!!!

biology
What environmental conditions would favor sexual reproduction? What environmental conditions would favor asexual reproduction? Organism - sexual reproduction - gonads asexual reproduction - honeybees - Is pillbugs an asexually organism or is a sexually organism? I think its ...

math
Prove this identity (cos è - 1) / (cos^2 è) = sec è - sec^2 è I have a question when you simplify the secant in terms of cosine. Would you cross multiply but then again there's the subtraction sign there instead of a multiplication sign? then ...

English
I'm sorry i didn't see this question posted, by accident i made the same question. I'm sorry once again.

English
A moral defect in a work of art is always also an artistic defect What does this quote mean? Therefore, any defects of art can easily give away clues. I'm confused with this quote.

English
A moral defect in a work of art is always also an artistic defect. What does this mean? Therefore, any defects can easily give away clues. I'm confused with this quote.

GRD 11-NEEED IT FAST, EMERGENCY
Line of best fit

English
“I've got a theory that if you give 100 percent all of the time, somehow things will work out in the end.” by Larry Bird, im thinking if this is the quote related to perverse but im confused on what the quote is stating

English
Oh okay. When i looked up i've got a theory i thought it was related to lyrics of a song or something else. But thanks

English
Can someone explain this....."I've got a theory". I looked up the def. of perverse and realized it's someone who is stubborn or wrongly self-willed. But I'm confused on that quote stating "I've got a theory". How is this quote related to ...

chemistry
What quantity of heat is required to warm 53.7 g of liquid water from 0°C to 100°C?

math

physics
A box weighs 50 N, placed on a titled board (30). What force must be applied to pull the box up the board at constant velocity(u=0.35)

Math
what is thr perimeter of an equilateral triangle that measurea 4 in one side

Math
How do I find the dimensions of a piece of wrapping paper used to wrap the box? The dimensions are 15in, 9in, 4in. The Surface area equals 462. I don't know to make it into an answer like 40 in. BY 10in

Math
Surface area and I was wrong it ='s 462.0

Math
How do I find the dimensions of a piece of wrapping paper used to wrap the box? The dimensions are 15in, 9in, 4in. The SA equals 270. I don't know to make it into an answer like 40 in. BY 10in

french
what does nous avons bu un cafe mean?x

Chemistry- Solubility Curves
If 50 grams of water saturated with potassium chlorate at 23*C is slowly evaporated to dryness, how many grams of the dry salt will be recovered? I know that I should know this.. But it has 50 grams of water instead of 100. ): Please, someone tell me how to do this?

organic chemistry
how do you increase the yield of triphenylmethanol in a grignard reaction?

organic chemistry
how do you increase the yield of triphenylmethanol in a grignard reaction?

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 (...

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.

chemistry
if you started with 2.154g of aluminum, how many grams of aluminum oxide would you get?

chemistry
how many grams of magnesium is needed to produce 2.154g of magnesium nitrate?

UW Lacrosse
if you started with 2.154grams of al, how much of product of aluminum oxide would you expect?

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?

No because similar objects are congruent. Congruent figures are the same size and the same shape.

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 ...

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

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

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

social studies
Approximately what percentage of Th Colonial population were patriots, neutral, loyalists?

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

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

Algebra
i need help with graphing inequalities ex: y < 4 + x

statistics
Im a fat cheatercheater

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?

lit
what word best describes ha mercedes and charles? sensitive frightened prepared or inexperienced

Social Studies
What Florida County did the seminole indians fight over against the american colonists? A) Seminole B) Highland C) Dixie D) Osceola

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

To: Writeacher
Ok thanks for the update I'll be back on here later to check.

For all teachers
Does anyone know if Sra will be on here today because I really need her to check my french.

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 ...

diagramming a sentence
is book old

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 ...

science
explain why certain bugs can walk on water

Sciece
What is the pronunciation rebus for nitrogen?

English
You could say this: I cheat because I use a website on the internet to get the answers.

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.

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:)

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 ...

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...

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

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.

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 ...

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...

World History quick question
What kind of picture/symbol would you draw for principle of intervention?

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?

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?

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 ...

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...

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.

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...

analogies
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Physics
can somebody explain how to do this problem without changing it to radians? the final answer has to be in rates per minute

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

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...

u.s. history
thanks for the help

u.s. history
Why did Northerners oppose slavery? Thanks.

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...

spanish
thanks :)

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

General Physics
You use the formula: 1/2mv^2= 1/2kA^2

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?

Algebra
6a-3b

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 ...

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. ** ...

math
Cost= \$10.00 for the belt \$33.00 for the socks (\$3.00 x 11) \$3.00 for shipping 10+33+3= \$ __________

Physics
you lost be. k= 12 000 N/m where are you getting 1 or 10

Physics
and how do i solve for x when it is on oth sides of the eq'n?

Physics
pe= potential energy?

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

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 ...

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?

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.

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)?

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 ...

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

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 ...

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 ((:

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!

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