Saturday

August 29, 2015
Total # Posts: 612

**Mathematics**

A solution is mixed with a 12% acid solution to form a 16% acid solution. How many liters of the 20% acid solution are used to make 10 liters of the 16% acid solution?
*February 24, 2010*

**physics**

The current of a river is 1.9 m/s. A person can swim 0.7 m/s. What is the best angle for the swimmer so that it is swept downstream the shortest distance possible? Distance of river is 120 m.
*February 22, 2010*

**AP Chemistry**

A 500 g piece of metal at 60 degrees celsius is placed in 200g of water at 22 degrees celsius contained in a coffee cup calorimeter. The metal and water come to the same temperature at 32.5 degrees cesius. The specific heat of the water is 4.184 j/g(degrees celsius) a) how ...
*February 15, 2010*

**AP Chemistry**

i still keep messing up, can someone give me a specific answer i can use as a base?
*February 15, 2010*

**Math**

Thank you
*February 3, 2010*

**Math**

Two small planes start from the same point and fly in the opposite directions. The first plane is flying 35 mph slower than the second plane. In 2 hrs, the planes are 530 mi apart. Find the rate of the slow plane.
*February 3, 2010*

**SOCIAL STUDIES**

THIS IS ABOUT EXPLORERS. WHAT IS A JOURNEY MADE FOR A SPECIAL REASON?
*January 28, 2010*

**Math**

The price of an international call from Detroit to Paris, France, using a particular phone company is 75 cents for the first 5 minutes and 10 cents for each additional minute or fraction thereof. What is the cost (in dollars) of a 25 minute call from Detroit to Paris?
*January 23, 2010*

**physics**

Jennifer (mass 58.0 kg) is standing at the left end of a 13.0 m long 594.0 kg cart that has frictionless wheels and rolls on a frictionless track. Initially both Jennifer and the cart are at rest. Suddenly, Jennifer starts running along the cart at a speed of 5.70 m/s relative...
*January 22, 2010*

**Language Arts**

Is the following a correct sentence: Martha and him ate the sandwich.
*January 14, 2010*

**math**

what is 6 3/4 - 7 2/8
*January 13, 2010*

**social studies**

compare trading in China, America, Egypt and Greek then and now.
*December 10, 2009*

**social studies**

what is the history of trading then and now
*December 10, 2009*

**Physics**

A spring has a spring constant of 259N/m. Find the magnitude of the force needed (a) to stretch the spring by 3.54 10-2m from its unstrained length and N (b) to compress the spring by the same amount. N
*November 17, 2009*

**5th grade Language**

Read the poem and answer the question 1. There once was a owboy named Ray 2 who never had that much to say 3 except or the times 4. Stampedes topped on a dime 5 when that cowboy named Ray hollered "hey" 1 in which lines do you see repetition? 2 what is the example of...
*November 5, 2009*

**4 grade**

do you have a anwser to this question ,68, ,94, ,120 and the rule
*October 22, 2009*

**Physics**

I think the 2a is meant to be 2 * a
*October 18, 2009*

**Physics**

When you lift a ball with a force of 82N, the ball accelerates upward with an acceleration of a. If you lift with a force of 92N, the balls acceleration is 2a. Find the weight of the ball, and the acceleration a. I tried solving this via substitution algebra, but the answer ...
*October 18, 2009*

**4th Grade Math**

Do you have any answers for this question ,68, ,94, ,120, and the rule
*October 12, 2009*

**Social Studies**

What idea did the United States Constitution borrow from the Iroquois League?
*October 12, 2009*

**Physics**

My thoughts were that tension must be halved in one sense or another, but I cant seem to get the math to work out involved, perhaps Im missing the equations entirely.
*October 8, 2009*

**Physics**

This is another problem that I need clarification on since no one seems to be of any help at my school, A pulley system is used to lift a 52- crate.Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume ...
*October 8, 2009*

**Physics**

C ( ) | O | | | | | | | | | | O ) (Force via hand) | [52kg] Sorry for such a crude drawing but if you imagine the lines as the rope, the parentheses as curves in the line, and O's as the pulleys. C = Cieling
*October 7, 2009*

**Physics**

This is another problem that I need clarification on since no one seems to be of any help at my school, A pulley system is used to lift a 52- crate.Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume ...
*October 7, 2009*

**math**

The solution seems to follow this pattern. 2 x 5 = 10 10 -5 = 5 5 x 5 = 25 25- 5 = 20 20 x 5= 100 Basically first number times 5, next minus 5, the next again times 5, the one after minus 5 Etc.
*October 7, 2009*

**Physics**

\ 130o / \ / \ / \ / \O/ /|\ C mg C 1 2 C= contact force #1 and #2. Does this fit your logic?
*October 7, 2009*

**Physics**

Please help me out, I can't figure out the process for answering this question and my TA is of no help, A 0.11- ball is placed in a shallow wedge with an opening angle of 130 degrees,for each contact point between the wedge and the ball, determine the force exerted on the ...
*October 7, 2009*

**history**

What is socialism?
*October 3, 2009*

**Bio**

Flowering is not a category in which land plants are classified.
*September 22, 2009*

**mathematic**

if f(x)=cos(5x) find f(pie/4)
*July 19, 2009*

**math**

if f(x)=cos(5x) find f(ð/4)
*July 18, 2009*

**math**

thank you soo much for all ur help
*July 18, 2009*

**math**

thank you very much for all ur help
*July 18, 2009*

**math**

if f(x)=3tan(x)+2 and, find f(ð/3)
*July 18, 2009*

**mathematics**

sinÈ= 1/4 and ð/4<È<ð, find the value of cosÈ
*July 18, 2009*

**mathematics**

for all values of X for which of the following is defined, find th value of cot^2(X)- csc^2(X)
*July 18, 2009*

**Physics**

wwhat is the kinetic energy of a 1500kg car with a velocity of 72km/r B.... how much work must be done on ths car to bring it to a complete stop
*June 20, 2009*

**math**

how do u factor 7x^3+28x^2-35x ? thanx.
*June 6, 2009*

**5th grade math**

Round 427,685 to the nearest thousand. A. 400,000 C. 428,000 B. 427,000 D. 430,000 the answer is C Round 0.8394263 to the nearest hundred-thousandth. A. 0.840 C. 0.83942 B. 0.83943 D. 0.839 would the answer be B?
*May 14, 2009*

**English**

Could someone help me write a thesis statement for the following topic: "Our school should be free of all weapons including the guns carried by a police officer." So far this is what i have for a thesis statment. "Although having police officers in our schools ...
*May 7, 2009*

**English**

It still needs some tweaking. I feel that it's too specific. What do you think?
*May 6, 2009*

**English**

Hi, thanks your website was helpful. I don't think armed police officers should be in our schools. This is what i have so far: "Although having police officers in our schools has proven a success rate in the decrease of violence and bullying, armed police is not a ...
*May 6, 2009*

**English**

Hi, I am doing an essay on the topic "Our school should be free of all weapons - including the guns carried by a police officer.I am having difficulty coming up with a thesis statement, could you help me. Thanks.
*May 6, 2009*

**6th Grade Math**

28%
*March 30, 2009*

**5th grade**

what is m+4=1
*March 24, 2009*

**chemistry**

In order from highest to lowest. heptane, 2,2-dimethylpentane, hexane, and butane .
*January 24, 2009*

**Chemistry**

A student determined that ethanol was the best solvent to use for a recrystallization based on small scale trials. When the recrystallization was carried out on a larger scale, no crystals were obtained on cooling the hot solution. Why? and how would you overcome this problem???
*January 24, 2009*

**Economics**

Hi there, I am having trouble with this problem.Can you give me some guidance. In planning the publication of a new engineering economics textbook, the publisher has identified the following fixed and variable costs. Fixed Costs Overhead- $10,000 Editing and Typesetting- $100,...
*January 21, 2009*

**college**

I need help with drug treatments for the respiratory system
*January 13, 2009*

**Geography**

what is the biggest holiday for followers of Shinto?
*January 8, 2009*

**Math**

Can someone help me solve this please A*.3=B A-B=150,000
*December 17, 2008*

**science**

Folic acid, iron and calcium
*December 17, 2008*

**project management**

for example increase profits or increase employee moral.. these are just examples.
*November 24, 2008*

**project management**

Using the MBO approach (management by objectives)come up with a strategy.(make it up) Break them into the 4 levels level 1 top level 2 division level 3 department level 3 employ
*November 24, 2008*

**project management**

You find a problem in a project. The project has a defined baseline and task progress has been entered for all tasks for the first report period. The ACWP field show the right cost for the work reported, but the BCWP and BCWS fields are zero. what could be the problem?
*November 16, 2008*

**Communications**

thank you for the articles. I'm focusing on external communications in north america. Does the txt messaging article also refer to North america?
*November 9, 2008*

**Communications**

Hi there, I am doing a project on Cadbury Chocolate and how to uses (external communication) could you give me ideas of what i should talk about? Or any useful websites or videos? Thanks.
*November 9, 2008*

**Algebra**

On a bull.
*November 9, 2008*

**Math check**

To complete the square, you divide the number before the x by 2, square it, and add it to the end. The answer is d.
*November 9, 2008*

**Math help**

Yes.
*November 9, 2008*

**pre-algebra**

-8a+6(a+7)=1 -8a+6a+42=1 -2a=-41 a=20.5
*November 9, 2008*

**algebra2**

-3x+y=-2 -2=7x-y
*October 26, 2008*

**mth**

34%
*October 20, 2008*

**Math**

Mike took a 2"x4" picture to the photo store. He had it made into a 4"x8" print. Which geometric concept best describes the relationship between the two prints? Similarity, Linear, Symmetry or Congruency?
*October 20, 2008*

**math-3rd grade**

Explain your thinking. Use the digits 1, 3, 4, 5, 7, and 9 to write two money amounts that you can subtract by trading 1 dollar for 10 dimes. Then solve.
*October 15, 2008*

**science**

what are the physcial changes of ethylene glycol at 197 degrees
*October 6, 2008*

**math**

[-50/2+3] (20-9)
*October 6, 2008*

**Chemistry**

Greetings: I was wondering how to calculate the weight/volume % of vinegar using the formula ---------------w/v Per Cent = g/100 mL or grams per deciliter: WHAT WEIGHT DO I USE NaOH, Acetic ACID? the data include: volume of NaOH needed to neutralize Vingegar : 14.24 mL Volume ...
*October 1, 2008*

**Math**

how can i help my son matthew about division and subtract borrow . thanks
*September 9, 2008*

**Math**

9 in the thousands and 2 in the ones
*August 26, 2008*

**unscramble**

tselaacdns
*May 8, 2008*

**science**

Why is plastic an expensive material to use?
*May 6, 2008*

**Physics**

Nope.
*April 30, 2008*

**math**

Which is an equation of the line with slope 2 and y-intercept 6? A). y=2x-6 B). y=6x+2 C). 2x+6y=1 D). y+2x+6. thanks if you can help
*April 16, 2008*

**Social Studies**

I am presently creating a unit about land transportation in the community and how these transportations affect our daily lives eg. taxi, garbage truck, train etc. Do you have any ideas or suggestions for a fun lesson plan.... do you have any websites that could at least give ...
*March 28, 2008*

**Science 4th grade**

Why is it important for 4th graders to learn about animals that live in the ocean?
*March 25, 2008*

**Chemistry; to drwls or drbob**

i think i have posted this before except i forgot to put the decimal in the temperature. i was hoping you could help me now that it might make more sense. The total pressure in a flask containing air and ethanol at 25.7 C is 878 mm Hg. The pressure of the air in the flask at ...
*February 4, 2008*

**Genetics**

what is the chance of a woman having five female children in a row?
*January 9, 2008*

**Chemistry**

what is mm^2?
*January 8, 2008*

**Digital Logic**

How many flip-flops, in a shift register, would be required to hold an initial count of 16?
*December 4, 2007*

**Digital Logic**

The input voltage to a certain op-amp inverting amplifier is 10 mV, and the output is 2 V. What is the closed-loop voltage gain?
*December 4, 2007*

**English Grammar**

In the sentence "They are always late to the ball game.", what part of speech is "always" and "late"?
*December 3, 2007*

**CALCULUS!**

suppose that 3 <_ f prime of x <_ 5, for all values x. show that 18<_ f(8)-f(2) <_ 30 <_ signs mean less or equal to... im supposed to apply mean value theorem or rolle's theorem... i dont understand neither so i cant do the question! please help!
*November 10, 2007*

**Algebra Word Problem**

A rectangle's length is 8 cm more than three times it's width. If the perimeter is 128 cm, find the length and width. What is the equation for this?
*November 5, 2007*

**Algebra**

Thanks
*November 5, 2007*

**Algebra**

Can you show me how to do this problem please. Thanks. |4-6to the second power ÷ 2 |- |-6|=
*November 5, 2007*

**Algebra Absolute Value**

|-2/3(x-6)| = 12
*October 27, 2007*

**algebra**

How did you get the answer?
*October 27, 2007*

**algebra**

|10-2x|=18
*October 27, 2007*

**History**

Why did Jefferson as the Democratic-Republican candidate win the election of 1800? -Clearly stated thesis -Identify and describe 3 factors that influenced the outcome of the election -A conclusion that pulls the ideas together
*October 18, 2007*

**History**

is that good? =)
*October 18, 2007*

**History**

Thomas Jefferson won the election of 1800 due to his strong Democratic - Republican Party, Major support of the majority of the 16 states, and friendly help from the federalist Alexander Hamilton. Jefferson was able to win his election in 1800 due to the strong Democratic &#...
*October 18, 2007*

**History**

is this a good thesis? Thomas Jefferson won the election of 1800 due to his strong Democratic - Republican Party, Major support of the majority of the 16 states, and friendly help from the federalist Alexander Hamilton
*October 18, 2007*

**History**

Why did Jefferson as the Democratic-Republican candidate win the election of 1800?
*October 18, 2007*

**Chemistry**

A silver bar has mass of 368g. What is the volume, in cm^3, of the bar? the density of silver is 19.5 g/cm^3.?
*October 11, 2007*

**Chemistry**

The diamenter of a carbon atom is 77 pm. Express this measurement in um?
*October 11, 2007*

**Chemistry**

What are the 3 rule the govern the filling of atomic orbitals by electrons?
*October 8, 2007*

**Chemistry**

What the difference between an orbit in the Bohr model and an orbital in the quantum mechanical model of the atom?
*October 8, 2007*

**Algebra**

A suit designer has 15-3/5 yards of fabric. each suit uses 2-1/8 yards of fabric. (1) How many suits can be made? (2) How much fabris is left over?
*September 30, 2007*

**PHYSICS**

THE TYPICAL RADIO WAVE HAVE A PERIOD OF 1 US EXPRESS THIS PERIOD IN SECONDS
*September 12, 2007*