Wednesday

August 27, 2014

August 27, 2014

Total # Posts: 1,214

**chem**

A 3.48 gram sample of sodium sulfate hydrate lost 1.35 gram of water when heated to constant weight. What is the formula of the hydrate? this is what I did, but I am stuck. Na2SO4 . H2O------> NA2SO4+H20
*April 2, 2009*

**11th grade Chemistry**

Thats how its on the paper !
*March 30, 2009*

**11th grade Chemistry**

[mole-mole] How many moles of NaOH are needed to react with 5.0 moles of sulfuric acid, H2SO4??? Equation: H2SO4 + 2 NaOH ---> Na2 SO4 +2 H2 O
*March 30, 2009*

**Bio**

I have a question about genetic drift...wat is it actually...the book said that it random change in allele frequency but how does that happen??? and wats a founder effect?
*March 12, 2009*

**Science Bio**

thanks so much for explaining!
*March 8, 2009*

**Science Bio**

Hi there, I have a quick question which I'm really stumped on. 1. When combined with Lugol's solution (iodine), does glucose and sucrose contain starch? I think glucose has starch but not sucrose. Is this right?
*March 8, 2009*

**Science/Physics**

HOPE THIS IS BETTER John Loads A Collapsed Inflatable Boat Into A Two-wheel "grocery Type" Handcart and wheels it down the lake. (A) while the cart is being wheeled it is tipped at about a 45-degree angle (in other words, about halfway between horizontal and vertical...
*March 4, 2009*

**Science**

You Are Out In The Woods And You Need To Move A Boulder That Is In The Way, You Happen To Have A Long 2-by-4 Board With You And You Decide To Use It As A Lever. You Find A Rock To Act As A Fulcrum. Which Of The Following Would Be A Good Thing To Try? I believe the answer is A ...
*March 4, 2009*

**Science**

John Loads A Collapsed Inflatable Boat Into A Two-wheel "grocery Type" Handcart. He Used An 8 Foot Long Board To Lengthen The Underside Of The Cart, The End Of The Board Serves As A New Extended Handle For His Cart.Now When He Goes To Pull His Longer Cart, He Is ...
*March 4, 2009*

**Science**

Lever, You Find A Smaller Rock, Use As A Fulcrum, You Place It A Meter From Boulder. What Works? """I choose A"""" A)move the fulcrum rock closer to the boulder b)move the fulcrum rock farther from the boulder c) try using the board without a...
*March 4, 2009*

**Science/Physics**

So the answer is B
*March 4, 2009*

**Science/Physics**

Which Is A True StateMent? When comparing the force that is required to climb a mountain by walking up a trail that slopes gently upward to the top, versus getting there by scaling asheer vertical cliff face, """"I believe it would be D"""&...
*March 4, 2009*

**Physics**

When Using A Graph To Solve A Problem About How Far A Car Traveled During Specified Time During Which It Was Accelerating, How Many Area Calculations Do You Have To Make? What Is/are The Shape/shapes You Are Calculating? ( I believe the answer is D) A. One area calculation, a...
*March 4, 2009*

**8th Grade Algebra**

These are extra credit questions, and I just want to know how to solve them. 1) The sum of two-digits of a two digit number is 14. If the number represented by reversing the digits is subtracted from the original number, the result is 18. What us the orinal number? 2) If 27 is...
*March 4, 2009*

**science**

Which One Is The Right Answer? A Coulomb Is A Measure Of _____ Whereas An Ampere Is A Measure Of _____ ? I think the answers is A A.) Quantity & Rate --- B.) Rate & Quantity --- C.) Voltage & Resistance --- D.) Quality & Quantity
*February 28, 2009*

**science**

The Main Purpose Of The Grounding Pin In A Three-pong Plug For An Appliance Is To __? What's The Main Purpose Is? i believe the aswer is c a. boost the current flow to the appliance b. prevent short cicuits c. prevent electrical shocks
*February 28, 2009*

**Science**

In a typical home electrical panel installation the main ground wire is conneted directly from a ground rod? I believe the answer is A A. case of the panel b. main breaker switch c. live bars d. electric meter
*February 28, 2009*

**science**

In experiments involving a pithball electroscope, what causes the pithball to move? I believe the answer is B A. The pith material always holds a natural positive charge, and it is attracted to other charged objects. B. Electrons jump onto or off the neutral ball when a ...
*February 28, 2009*

**Science**

There Are Three Resistance In A Parallel Circuit. Two Of Them Are Rated At 20 Ohms, The Other At 10 Ohms. What Is The Circuit's Total Resistance? I believe the answer D 5ohms A. 20 ohms b. 12 ohms c. 8 ohms d. 5 ohms
*February 28, 2009*

**Science**

There are two light bulbs in a circuit, wired in parallel. A third light bulb is added again in parallel. What is the effect on total resistance of adding this third bulb? I BELIEVE THE ANSWER IS C.... a. Total resistance increases by one third. b. total resistance triples c. ...
*February 28, 2009*

**Science**

What happens when you rub an ebonite stick with a wool cloth? (Choose below) I belive the answer is B? a. Electrons are transferred to the stick, causing it to take on a negative charge. b. Electrons are transferred to the stick, causing it to take on a positive charge c. ...
*February 28, 2009*

**English Writeteacher**

Can you proofread this for me please? Mr. Johns has demonstrated some very unique findings about physical therapy through different research and projects. Michael has developed a seminar curriculum and has done many clinical assignments at different locations. He has presented...
*February 25, 2009*

**English**

I have to write a justification memo. I have no idea what to write it on any ideas.
*February 23, 2009*

**English Follow up**

Here is the Recommendation Memo that I wrote. The way that I set up is that way that it was in are book. Everything that I wrote is made up. Please feel free to add things or take things out. Can u please look at my grammar please. Thak you so much Memorandum To: Ronald Mills...
*February 23, 2009*

**english**

Ok Will do. Once I'm done I will post it for you to read to see if its good thanks
*February 23, 2009*

**english**

Is a recommendation memo and a recommendation letter the same thing? I have to write a recommendation letter for my english class and I thought about writing it on recommending someone to a university for a graduates program is that a good topic
*February 23, 2009*

**English**

For my english class we have to write a recommendation memo and a justfication. I need two different topics. Do you have any ideas on what I could write them on.
*February 22, 2009*

**General Question**

What does duely Certified mean?
*February 21, 2009*

**Random ?**

Why do the questions that we post can be viewed from google?
*February 21, 2009*

**homework**

1.What sentence is unrealed to the topic and can be elimnated? 1)A trip to the ocean can be a relaxing escape from the everyday pressure of life. (2)A sailboat glistening on the horizon provides a mental escape to faraway places. (3)the rhythm of the ocean beating against the ...
*February 20, 2009*

**science**

That is what I do not understand that is exactly how it was written. I do not understand the question.
*February 20, 2009*

**science**

Someone asked me this question but I just do not know how to reply to it.Any help would be awesome. There are some who feel urbanizing is a bad thing for our environment, but it would be the answer to problems like this that we go through. What do you think?
*February 20, 2009*

**Biology**

i can't use any food related items
*February 18, 2009*

**Biology**

Hi, I've just recently gotten a project that requires you to make a 3D model of the mitochondria. I'm thinking of making it out of clay, but can someone help me think of other ways to make it? thanks.
*February 18, 2009*

**1st grade social studies**

the revolutionary war,my son has a project due on 2/23/09 about the revolutionary war.what are white oak tags,how do i go about doing this project.
*February 16, 2009*

**7th grade**

i known bobpursley is right what seventh graders are supposed to be doing in science?
*February 1, 2009*

**7th grade**

i dont known that why i need help 2
*February 1, 2009*

**help!! organic chemistry**

Write the mechanism for the reactions of 1) (E)-3-hexene and bromine and 2) (Z)-3-hexene and bromine in dichloromethane. Assign R,S configuration for each of the products and determine whether they are related as enantiomers or identical. I know how to write the mechanism for...
*February 1, 2009*

**Science**

Piezoelectricity is caused by pressing or squeezing___________? a power rods. b. crystals c. zinc plates d. magnets I believe the answer is b.
*January 31, 2009*

**Science**

Piezoelectricity is caused by pressing or squeezing___________? a power rods. b. crystals c. zinc plates d. magnets I believe the answer is b.
*January 31, 2009*

**Science**

In a wet type of voltaic cell, what is the electrolyte? a. a bridge made of salt b. a copper strip c. an acidic liquid d. a spontaneous flow of electrons A believe the answer is C
*January 31, 2009*

**chemistry**

-Why do most atoms form chemical bonds? -What is the purpose of control in an experiment?
*January 26, 2009*

**health**

How has the payment of health care providers evolved over time? What caused these changes?
*December 18, 2008*

**goe./writtng**

does this make sence?: Argentina is a beautiful country filled with vast geography.
*December 16, 2008*

**8th grade**

what two advantages did the british have over the patriots
*December 15, 2008*

**english**

Ok thank you
*December 12, 2008*

**english**

Well I wrote tattoos are a good idea for some and a bad idea for others. The problem I am having is Why are they good and bad lol. I wrote how someone loves the fact they can have a picture of their deceased mom and how someone regrets they're tattoo acquired in college. ...
*December 12, 2008*

**english**

Hi I have to write a paper on 2 opposing sides of tattoos. but everytime I show my teacher 2 sides I think of she keeps saying the paper is still one sided. Can someone please help me find 2 truly opposing arguements when it comes to tattoos thanks sooooo much.
*December 12, 2008*

**fs**

Call her or send a card. 7 months isn't that long. I have friends I haven't talked to in 10 years and I wish I had contacted them a long time ago. You won't be sorry you did. Even if she doesn't respond you will know you gave it a shot. Good luck!
*December 10, 2008*

**College Algebra**

Find the sum 5/3+9/3+17/3+33/3+... I answered infinity, but that just seems too simple. Thanks for your help!
*December 10, 2008*

**College Algebra**

Suppose you are offered a job at $1600 a month with a guaranteed increase of $70 every 6 months for 5 years. What will your salary be at the end of this period of time? Thank you!!
*December 9, 2008*

**College Algebra**

A machine depreciates by 1/5 of its value each year. If it cost $50,000 new, what is its value after 8 years?
*December 9, 2008*

**College Algebra**

Nevermind I got the answer, 5.73 miles. Thank you!
*December 8, 2008*

**College Algebra**

The atmospheric pressure P in pounds per square inch, at x miles above sea level is given by P=14.7e^-0.21x. At what height will the atmospheric pressure be one third of the sea-level pressure? Thank you!!
*December 8, 2008*

**College Algebra**

Thank you, you are a life saver!
*December 8, 2008*

**College Algebra**

The hydrogen ion concentration of a substance is related to its acidity and basicity. Because hydrogen ion concentrations vary over a very wide range, logarithms are used to create a compressed pH scale, which is defined by pH=-log(H+)where (H+)is the hydrogen ion ...
*December 8, 2008*

**Health**

Thanks for your help :)
*December 5, 2008*

**Health**

I am having a hard time trying to determine this. I know this may sound horrible but I do not know much about the economy and need help with this: In what ways do health care expenses affect an economy?What are the economic advantages and disadvantages in healthcare? Any Help ...
*December 5, 2008*

**College Algebra**

Thank you very much!!
*December 3, 2008*

**College Algebra**

A rectangular dog pen is to be made to enclose an area of 144 sq. ft. The pen is to be divided into 2 equal sections by a section of the fence. Assuming a total of 400 sq. feet of fence, find the dimensions of the pen that will require the least amonut of fencing material. Ok ...
*December 3, 2008*

**College Algebra**

Thank you so much for your help!
*December 3, 2008*

**College Algebra**

I need a little help with this problem. P(x)=2x^4-17x^3+47x^2-58x+24 (A) Find all possible candidates for real zeroes. I got +-1, +-2, +-3, +4, +-6,+-8, +-12, +-1.5, +-.5, and +-24. Then I have to find all real zeroes. I tried all of the possible candidates and none of them ...
*December 3, 2008*

**calculus**

integrate: square root of (4-x^2)
*December 2, 2008*

**College Algebra Word Problem**

A rectangular dog pen is to be made to enclose an area of 625 sq. ft. The pen is to be divided into 2 equal sections by a section of the fence. Find the dimensions of the pen that will require the least amount of fencing material. Thank you!
*December 1, 2008*

**MacroEconomics**

Why might discretionary countercylical fiscal policy actually be destabilizing to the economy?
*November 18, 2008*

**health**

I am having a hard time putting down in writing what differenes in the roles the medical and adminstration play in the hospital field. I know that doctors examine, treat, prescribe medicines but other then that im blank :( any help would be greatly appreciated.
*November 17, 2008*

**health care**

thanks for yur help
*November 14, 2008*

**health care**

Hi I just need help with defining these meanings when it comes to healthcare. I think I am on the right path but need some assistance. (Hospitals are generally categorized as nonprofit, for-profit, or governmental.)Identify at least one example of each from your community or ...
*November 14, 2008*

**Algebra**

WITH A CATTLE ACT
*November 9, 2008*

**geometry**

3y-1+2x-28=180 i need help making two equations out of this
*November 5, 2008*

**geometry**

3y-1+2x-28=180 help me find the value of x and y
*November 5, 2008*

**college algebra**

But if it shifts up 1 unit shouldn't I add it to the y?
*November 4, 2008*

**college algebra**

(x-3)^2+(y-2.5)^2=7.25 Make a new equation that shifts up 1 unit and to the right 2 units. I got (x-5)^2+(y-1.5)^2=7.25, but I got it wrong on my test. Could you please tell me where I might have gone wrong? Thank you!
*November 4, 2008*

**college algebra**

(x-3)^2+(y-2.5)^2=7.25 Make a new equation that shifts up 1 unit and to the right 2 units. I got (x-5)^2+(y-1.5)^2=7.25, but I got it wrong on my test. Could you please tell me where I might have gone wrong? Thank you!
*November 3, 2008*

**Macro Economics**

What happens if anything, to the unemployment rate when the long run aggregate supply curve increases? I think it shifts to the right?? I need some help on this one.
*October 29, 2008*

**college algebra**

It was on a test. I think it was written like that to trick us. Normally I don't have a problem with math, but this teacher is pretty tricky! I really appreciate all of your help=;)
*October 24, 2008*

**college algebra**

On the graph, plot all relevant points for y=x^2-4x+y^2-2y+8. Then give the equation for a graph that shifts down 1 unit and to the right 2 units. If it is a function, give its domain and range. Thank you!!
*October 24, 2008*

**college algebra word problem**

Okay, I just forgot the 2. Thank you so much for your help! Have a nice day!
*October 24, 2008*

**college algebra word problem**

Or V=1/3(24-2x)^2*x I'm confused as to how you came up with the base as 24-2x. Thanks for your help!
*October 24, 2008*

**college algebra word problem**

V(x)= x(24-x)^2 ?
*October 24, 2008*

**college algebra word problem**

An open box is made from a square piece of material 24 inches on a side by cutting equal squares from the corners and turning up the sides. Write the Volume V of the box as a function of x. Recall that Volume is the product of length, width, and height. Thank you!
*October 24, 2008*

**college algebra**

On the graph, plot all relevant points for y=the absolute value of x-1. Then give the equation for a graph that shifts up 3 units and to the left 4 units. If it is a function, give its domain and range. Thank you!!
*October 23, 2008*

**college algebra**

On the graph, plot all relevant points for y=x^2-4x+3. Then give the equation for a graph that shifts up 2 units and to the left 3 units. If it is a function, give its domain and range. Thank you!!
*October 23, 2008*

**Macro Economics**

Assume that the position of a nation's aggregate demand curve has not changed, but the long-run equilibrium price level has declined. Other things being equal, which of the following factors might account for this event? a. increase in labor productivity b. a decrease in ...
*October 22, 2008*

**college algebra word problem**

Wayne can do a job in 6 hours, while Susan can do the same job in 7 hours. How long would it take them to do the job if the worked together? Thank you!!
*October 20, 2008*

**college algebra word problem**

Lisa drove 8 miles to pick up her friend Laurie, and then drove 11 miles to a mall at a speed 15 mph faster. If Lisa'a total travel time was 24 minutes, what was her speed on the trip to pick up Laurie? Thank you!!
*October 19, 2008*

**us history**

Students should learn and study social studies in school so that they are aware of the mistakes people have made in the past and do not repeat these mistakes.
*October 19, 2008*

**english**

The third sentence, because even if she is able to invent programs, it does not mean she is able to pass critical judgments about it.
*October 19, 2008*

**math**

I got the square root of 7 for an answer. Is this correct?
*October 19, 2008*

**math**

If the lengths of two sides of a right triangle are 3 and 4, what is the least possible length of the third side?
*October 19, 2008*

**college algebra**

A paint-mixing machine has 2 inlet pipes. One takes 1 hour less than the other to fill the tank. Together they fill the tank in 3 hours. How long would it take each of them alone to fill the tank? Thank you!!!
*October 15, 2008*

**college algebra**

Find the time for 2 people working together to complete half of a task if it takes them 8 hours and 10 hours to complete the entire task working individually. Thank you!!!
*October 15, 2008*

**college algebra**

The number of motor vehicle deaths in the US was 49,391 in 1988 and 46,300 in 1990. If the trend stays the same, what will be the number of deaths in 2005? Thank you for any help!!!
*October 14, 2008*

**college algebra**

Thank you so much Reiny=:)
*October 14, 2008*

**college algebra**

Find the time for two people working together to complete half a task if it takes them 8 hours and 10 hours to complete the entire task working individually.
*October 14, 2008*

**college algebra**

Erin is a biology student. She heard that the number of times a cricket chirps in one minute can be used to find the temperature. In an experiment, she finds that a cricket chirps 40 times per minute when the temp. is 50 degrees(Fahrenheit) and 80 times per minute when the ...
*October 14, 2008*

**AP World History**

yes you can as long as you can back it up with information.
*October 14, 2008*

**7th grade**

What are three Jamestown difficulties?
*October 7, 2008*

**government**

Current First World’s military intervention in Third World countries, whether unilateral, multilateral, or through the United Nations, has little to do with the promotion of democracy; rather, it repeats the old colonial practice of “divide and rule” in order to...
*October 6, 2008*

**ecology**

I need to complete a life table. How do I find the xlxbx value of my data when I have the following age intervals: age interval(x1-xt+1) 0-63 63-124 124-184 184-215 215-264 264-278 278-292 292-306 306-320 320-334 334-348 348-362 362- lxbx is 0 0 0 0 0 0 0 0.053 .485 .802 .972...
*October 2, 2008*

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