Friday

October 24, 2014

October 24, 2014

Total # Posts: 1,756

**Math(Easy Survey Please Help)**

I need 75 of these surveys filled out to do a regression analysis for Economics. Just answer the 10 easy questions for me please. 1. Do you exercise or work out on a regular basis? 2. Are you male or female? 3. Do you smoke? 4. How many carbonated soft drinks do you consume in...
*March 22, 2008*

**AP Chemistry**

i'm having trouble balancing the redox reaction for the iodine clock lab. The redox reaction inovlves a hydrogen sulfite ion and iodate ion in an acidified solution. i have the final balanced equation, 5 HSO3 + 2 IO3 ---> I2 + 5SO4 + H20 + 3H but i'm having trouble ...
*March 13, 2008*

**kinda easy geometry**

I know this geometry question may be simple for some of you but it is hard for me. I use to be able to do this type of problem but I guess I forgot it over time. Im sure we all do. Any help on this question would help. Thanks in advance for whoever helps me. :-) A line passes ...
*March 9, 2008*

**bio II**

The molecule that provides energy for active transport is?
*March 5, 2008*

**science**

A + B -----> C is an example of a A) double-displacement reaction B) synthesis reaction C) single-displacement reaction D) redox reaction E) decomposition reaction
*March 5, 2008*

**social science**

Can someone give me like a short five sentence paragraph on What was the Renaissance? I am just having a hard time grasping onto that concept. Just a brief description would help me understand it a lot easier. thanks in advance to whoever can help me :-)
*March 4, 2008*

**Physics**

Thanks. :)
*March 4, 2008*

**Physics**

A 66.0 kg diver is on a diving board, which is 1.10 m above the water. He falls at a speed of 9.10 m/s. Calculate his kinetic energy as he hits the water. I know KE is 1/2mv^2, but how can I find KE when height is involved?
*March 4, 2008*

**social studies**

why did the great wall lose its importance after Wu Di's reign
*March 4, 2008*

**science**

what can you use to decide whether liquids tested are polar or nonpolar?
*March 3, 2008*

**science**

what basis can you use to decide whether liquids tested are polar or nonpolar?
*March 3, 2008*

**science**

A substance in a solid at room temperature. It is unable to conduct electricity as a solid but can conduct electricity as a liquid. This compound melts at 755 degrees celsius. Would you expect this compound to have ionic bonds, metallic bonds, or covalent bonds? A) metallic ...
*February 28, 2008*

**science**

below are about 21 questions from my final study guide. I was given a 563 question study guide for my final and obviously I did not understand every question. So basically I did not understand 4% of the questions which is pretty good. Just any help with the questions below ...
*February 28, 2008*

**science**

This is a science question so be prepared. lol How many orbitals does hydrogen (H) have? 1 or 2 or 3 How many orbitals does oxygen (O) have? 1 or 2 or 3
*February 25, 2008*

**science**

I need some help with my science homework. Well it is not really my homework it is my study guide but the actual test is the same as the study guide almost. They just switch around the words and stuff around to mess with your mind. These were just the only 7 problems I need ...
*February 25, 2008*

**science**

I need some help with my science homework. Well it is not really my homework it is my study guide but the actual test is the same as the study guide almost. They just switch around the words and stuff around to mess with your mind. These were just the only 7 problems I need ...
*February 25, 2008*

**long physics E&M**

i have the same problem.
*February 19, 2008*

**Maps**

I need to find a map where I can highlight countries on it. It has to have Switzerland, Europe, and The United States included on it.
*February 12, 2008*

**physcial science**

a 50 kg crate is lifted to a height of 10 meters. a. how much potential energy does the crate have after being lifted? b. if it took 5 seconds to lift the crate, using a machine what was the power rating of the machine?
*February 11, 2008*

**physical science**

a car of mass 900 kg move at 10 m/s. What is the braking force required to stop the car in a time of 5 seconds?
*February 11, 2008*

**physical science**

this is the question in the book, i dont understand either
*February 11, 2008*

**physical science**

find the net force produced by a 40 Newton force and a 50 Newton force in each of the following cases: Both forces act in the same direction both forces act in opposite directions.
*February 11, 2008*

**physical science**

Thats all the information i have
*February 11, 2008*

**Psychology**

When was the California Psychological Inventory created?
*February 8, 2008*

**Psychology**

Where was the Rorschach ink blot test created? I know it was created by a Swiss psychologist Hermann Rorschach but where?
*February 8, 2008*

**Math**

To gather enough nectar to make 1 pound of honey, a bee must visit 2 million flowers. How many flowers must a bee visit to make 64 ounces of honey?
*February 7, 2008*

**AP Chemistry**

Could you please review my work and see what i'm doing incorrectly? Thank you Given this information: CxHyOz (s) + O2 (g) ----> CO2 + H20 given: 2.165 g of the unknown hydrocarbon v = 1.868 L P = 130.2 kPa T = 65.0 degrees C g of H2O = 1.818 a)find g H in hydrocarbon 1....
*February 5, 2008*

**Chemistry**

this helped so much! thank you, i understand now.
*February 4, 2008*

**Chemistry**

Sorry I have one other question that i'm unsure about. for the solution process of A (s)----> A (aq) the teacher demonstrates upon mixing A in H2O that the temp falls from 22 to 5 degrees C. The soluability of this solid is known to be 28g/100g H2O at 30 degrees C. If ...
*February 4, 2008*

**Chemistry**

thank you
*February 4, 2008*

**Chemistry**

If the partial pressure of CO2 is 2.87 atm the soluability in H2O is known to be 4.68 M. What would be the soluability of CO2 in H2O if the partial pressure is increased to 7.60 atm? Assume the temp is held constant. would it work to set up a proportion for this question? if ...
*February 4, 2008*

**Chemistry**

The vapor pressure of water above a sugar water solution at 25.0 degrees C is 21.4 mmHg. What is the mole fraction of sugar in the solution? (assume sugar is a non-electrolyte, non-volatile solute and the vp of pure water at 25 degrees C is 23.8 mmHg) help, how do i solve this...
*February 4, 2008*

**Literature**

In Lord Of The Flies, Jack leaves part of what they kill for the beast. What does this remind you of, in general?
*February 1, 2008*

**CHEMISTRY**

that couldn't be right though because i only started out with .953 g and conservation of mass applies
*January 30, 2008*

**CHEMISTRY**

so the second equation would be: 0.635X + 0.526(0.953-X)=0.944 ????? 0.635X + 0.5013-.526X=0.944 0.109X/.109=0.4427/.109 x=4.061???? to three sig figs=4.06 is that the grams of BaCrO4???
*January 30, 2008*

**CHEMISTRY**

Yes, I didn't want to use a second variable because my teacher wants us to use different approaches. i checked the molar mass of AgNo3 and it is 169.87, so thank you. I didn't notice that. the new factor would be: 107.87/169.87 = .635 i'm not quite sure how to ...
*January 30, 2008*

**CHEMISTRY**

sorry, it would probably hep you to know that the objective is to calculate the percentage of silver and barium in the nitrate salt mixture. i know how to find the percentage once i get the grams, but i have no idea how to get the grams from this point. thanks :]
*January 30, 2008*

**CHEMISTRY**

I'm in the same class as Catie, and we're working on the same lab; however, i chose a different approach. here's what i have below, your help is much appreciated. so i have X= g AgNO3 0.953-x = Ba(NO3)2 therefore .953-X-NO3=? so far I caluclated the % of Ag and Ba ...
*January 30, 2008*

**English**

What are some images Robert Browning is trying to make us see in "A Woman's Lat Word" and "Rabbi Ben Ezra"? Is there a site where I can read an analysis of these two poems?
*January 30, 2008*

**AP CHEMISTRY**

The unit cells for most alkali metal halides are face-entered for both the cations and anions. In the case of NaCl the sodium ion is just a little too large for the chloride ions to touch each other along the face diagonal. The unit cell edge length is 564.0 pm. The sodium ion...
*January 24, 2008*

**science**

for what?
*January 16, 2008*

**Biology**

thanks
*January 12, 2008*

**Biology**

I know that the phosphate [cells] and sodium barcarbonate [blood plasma] buffer systems are two examples of biological buffers; however, i am writing an essay for bio and i need a third example. does anyone know of a third biological buffer system?
*January 12, 2008*

**Science**

Why is is it important to place your arm in a horizontal position rather than letting it hang down at your side when you take your blood pressure? Does everyone's heart create the same pressure? Why or why not?
*January 12, 2008*

**Science**

A fish is homozygous dominant for bug eyes and his mate is heterozygous. show the possible offspring. i have BB BB Bb and Bb for the possible offspring, but how do I express this phenotypic ratio? would 4:0 correct?
*January 9, 2008*

**Chemistry**

If I have to make a solution with sodium bicarbonate (baking soda) how do i find the molarity and how do i correctly make the solution??? i.e. how do i prepare a solution of sodium bicarbonate with a molarity of 0.01?
*January 8, 2008*

**math**

Damon I really dont understand please one hint.mt mom does not understand either
*January 7, 2008*

**math**

One number in each group does not fit 66,90,32,45,300 Pattern? 99,981,459,89,729 Pattern? 128,244,556,788,762 Pattern
*January 7, 2008*

**math**

12,18,15,21,18,24,21,27,24,30,27,34 13,26,18,36,23,36,28,41,33,46,38,51 44,54,47,57,50,60,63,73,66,76,69,79,72, 15,14,15,24,25,34,35,44,45,54,55
*January 7, 2008*

**math**

complete the pattern 12,18,15,21,18,?,?,?,?,?,?, 13,26,18,36,23,?,?,?,?,?,?,?, 44,54,47,57,50,?,?,?,?,?,?,?, 5,14,15,24,25,?,?,?,?,?,?,?,?
*January 7, 2008*

**Math**

How do i find the equation of a parabola in the form ax^2+bx+c?
*January 7, 2008*

**AP CHEM**

An ice cube tray contains enough water at 22.0 C to make 18 ice cubes that each have a mass of 30.0g. The tray is placed in a freezer that uses CF2CL2 as a refridgerant. The heat of vap of CF2CL2 is 158 J/g. What mass of CF@CL2 must be vaporized in the refridgeration cycle to ...
*January 2, 2008*

**AP Chemistry**

Thank you!
*January 2, 2008*

**AP Chemistry**

I was wondering if anyone could possible help me with this homework question? The normal boiling point for acetone is 56.5 degrees C. At an elevation of 5300 ft the atmospheric pressure is 630. torr. What would be the boiling point of acetone (deltahvap = 32.0 kJ/mol) at this ...
*January 2, 2008*

**What is discrete math? And is it relatively easy?**

I ask because my TA recommended taking it next semester along with calc 3. My major is electrical engineering, and I might throw actuarial science into the mix too. So yeah, lots of math.
*December 18, 2007*

**French**

thats right
*December 10, 2007*

**Math**

why does the president put vegtables in his blender?
*December 9, 2007*

**physics**

i dont get it
*December 4, 2007*

**How do you use the substitution method in math?**

Example: 2y + x = 3 (1) 4y – 3x = 1 (2) Equation 1 looks like it would be easy to solve for x, so we take it and isolate x: 2y + x = 3 x = 3 – 2y (3) Now we can use this result and substitute 3 - 2y in for x in equation 2: Now that we have y, we still need to ...
*November 28, 2007*

**Biology**

they have exoskeletons?
*November 27, 2007*

**English (Classical Myths)**

I have a myth project assigned. I got lucky (or so I thought) and had the myth of Polyphemus. Wikipedia has it if anyone doesnt know it. There are three things that I need for my project: 1) The moral of the story. 2) How the story explains natural phenomenon. 3) How the myth ...
*November 27, 2007*

**biology - requirements of diffusion?**

Im pretty sure its D because I think both A and C are needed and B sounds logical.
*November 27, 2007*

**Math**

oh lol, first I looked at this question and I was like wow, this is impossible to do because I thought you were asking for the COMMON factor for all of those... in the case of factors of each individual #... it should take you less than 5 minutes to do them... so you have ...
*November 20, 2007*

**math**

please help! find 3 consective numbers with a sum of 12. find three consective numbers with a sum of 45
*November 20, 2007*

**College Algebra ~ Please Help**

Anything related to projectile is related to quadratic. Examples can range from shooting a bullet like the example above to a simple action such as throwing a baseball upward. You can use quadratic to figure out what is the maximum height your ball will goes up to, what's ...
*November 20, 2007*

**biology**

umm... aren't they both contain DNA and DNA is made out of nitrogenous base and phosphate backbone? So I would say nitrogen and phosphorous.
*November 19, 2007*

**Algebra/Trigonometry**

huh? what is this? lol... 1/y-1/y = 0... then -3 = -3 duh?
*November 18, 2007*

**Chemistry**

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
*November 18, 2007*

**Chemistry**

Not 100% sure, but I say it's D. I think there are only 4 orbitals: s(2), p(6), d(10), f(18).
*November 18, 2007*

**Biology**

In glycolysis, Acetyl-CoA is recycled so it can be used again for another cycle or elsewhere for biosynthesis.
*November 18, 2007*

**science**

Efficiency can never reach 100% because there's always loss of energy during the process of carrying out work. One example is energy loss because they're converted into heat while operating.
*November 16, 2007*

**math**

Okay, this one you really really should plot out the coordinates. It will give you an approximate orientation of the line. If plotted it out and realized that ST is a diagonal segment with a POSITIVE slope (meaning it goes up from left to right, that let you know that the y ...
*November 13, 2007*

**math**

No, I didn't say D is (3,-1). The question asks you for 3 points on the segment CD that will divide that segment to 4 pieces equally. I'm just saying that the CLOSEST point to CD is (3,-1) just to correct what drwls said. The 3 points on the segment CD are (3,-1), (3,2...
*November 13, 2007*

**math**

Just plot out the two points and connect them and count the number of squares on your graphing papers to find the length. You should have 12 squares total in length if you drew in correctly because (8+|-4|) =12. Now you need to divide that into 4 equal parts so do 12/4 = 3 ...
*November 13, 2007*

**math**

3^2 is where I get the +9 from... the -6x is from (-3x)+(-3x). Solution = (-2,-1),(8,-1).
*November 13, 2007*

**math**

13^2 mean "13 square" or "13 x 13" or "13 raise to the power of 2". You have to square both sides of the equation to cancel off the "square root" on the right side of the equation so you can figure out "x", not "square ...
*November 13, 2007*

**math**

All right... so you have two points (x,-1) and (3,11) this is correlating to (x1,y1) and (x2,y2)in the distance formula. d = sqroot [(x2-x1)^2 + (y2-y1)^2] Plug in the numbers and you'll have: 13 = sqroot [(3-x)^2 + (11-(-1))^2] 13^2 = x^2-6x+9 + 12^2 169 = x^2-6x+153 0 = ...
*November 13, 2007*

**math**

I replied you, but I can't see it down here. Click on your first post of your question to view it.
*November 13, 2007*

**math**

Okay, to do all these problems relating to point coordinates. The first thing you do is to plot those points on the graph so you can have a clear picture of what it looks like. That's just a hint although you might be able to do this without plotting it, but it will be ...
*November 13, 2007*

**math**

Maybe re-wording this question will help you out. Find the distance between two points: a)(-4,3) and (5,-4) b)(-3,-2) and (3,5) I'm sure your teacher gave you this formula: d = sqroot [(x2 - x1)^2 + (y2 - y1)^2] where x and y are defined as (x,y) in the coordinate. x2 just...
*November 13, 2007*

**Chemistry - Kinetics**

a) Yes, you can probably tell because the activation energy gets lower and thus allow the reaction to speed up way faster than without a catalyst... it's kind of dumb to ask if in catalyst is involved in a CATALYZED reaction... b) No, the catalyst will get recycled at the ...
*November 13, 2007*

**Genetic**

I need to write a proposal of the possible traits we can actually measure in lab. What are some quantatitive traits of woodlice/isopod beside measuring their maximum speed.
*November 13, 2007*

**math**

What do you mean by "how would be the answer"? The answer to this problem is 1.
*November 7, 2007*

**math**

At 4:00 Joe's thermoter read 30C. He put it in the freezer and read it every 5 minutes. At 4:05pm, the temperature was 23C. At4:10pm the temperature was 16C.The pattern continues, when will the temperature be below 0C?
*November 5, 2007*

**Evolution**

In an experiment using quantitative genetic approaches to investigate the evolution of butterfly eye-spots as a model system for understanding development. There are 3 groups of butterfly populations: small (mean diameter = 2.6 mm), intermediate (3.4 mm), and large eyespots (3...
*November 5, 2007*

**Algebra 2**

The way I think of "range" is the possible values of the y-axis on your graph. The easiest way to see this is to actually enter the function into your graphing calculator and graph it out. In your example, you have a straight line with a slope of -1/3, so basically ...
*November 5, 2007*

**math**

how many possible 3 digit numbers are there that have a middle zero? how many possible 4 digit numbers are there that have two middle zeros? Explain your answears
*November 4, 2007*

**CHEMISTRY**

I don't even understand how this question works. How do I solve it? A microwave oven heats by radiating food with microwave radiation, which is absorbed by the food and converted to heat. suppose an oven's microwave is 13.7 cm. a container w/ 175 mL of water was placed...
*October 31, 2007*

**IB Math Studies**

Would it be appropriate to use a chi-square test for analysis of statistics in the following topics? •Number of Surgical Fatalities vs. U.S. State •Number of professional men’s soccer injuries vs. country of their team
*October 28, 2007*

**AP US History**

compare the rebellion of the american revolution to the rebellion of the civil war
*October 28, 2007*

**CHEM-HELP!!!!**

help? how do i calculate the heat of formation of a solid? i only know how to find the heat of formation of a liquid. here's what i have so far. delta t= 16.8 degrees c mass= 33.136 g cp = 4.184 j/g degrees c m cp delta t = -2329J (process is exothermic) what do i do now?
*October 24, 2007*

**English**

Does anyone recall the mythical beasts that were described on the map in Ondaatje's Running in The Family, the chapter entitled Tabula Asiae? I left my book in my locker ;/
*October 24, 2007*

**Chemistry**

Zinc is often used to calibrate calorimeters because it undergoes a very sharp phase transition from the solid to the liquid at 419.5°C. Calculate the enthalpy change when 5 g of zinc metal is heated from 100°C to the point where the entire sample is melted. (The heat ...
*October 23, 2007*

**Math**

If you say "10 less than y". Does it mean 10-y or y-10. Which is correct and why?
*October 17, 2007*

**CHEMISTRY**

If 142.38 g of l water at 21.7 degrees C is placed into a syrofoam cup with 174.36 g of ice at -27.5 degrees C what would be the final temperature of the entire contents at equilibrium? If it is partially frozen, how many g of the ice has melted? given values cp water = 4.184 ...
*October 14, 2007*

**computer class (please look!!!)**

use google book search to find the first line of page 3 in the book 'curious george goes to a chocolate factory' [sorry to make you do this hw but my internet is not fast enought to load this page] thx ^^!
*October 2, 2007*

**Chemistry**

2 HCl (aq) + Ba (OH2) (aq) ----> BaCl2 + 2 H20 (l) deltaH = -118 kJ Calculate the heat when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.100 M Ba(Oh2). Assuming that the temp. of both solutions was initially 25.0 degrees C and that the final mixture has a mass of 400...
*October 1, 2007*

**CHEMISTRY**

A 2.75 g sample of the hydrocarbon acetone, CH3COCH3, is burned in a bomb calorimeter with 975 mL of water, initially at 23.50 degrees celsius. The bomb is constructed of 285.0 g of nickel metal having a specific heat capacity of Cp = 0.826 J/ g degrees C. The final ...
*September 30, 2007*

**Ap Chemistry**

Posted by Jake on Sunday, September 23, 2007 at 1:08pm. My objective is to find the molar volume of a gas. Is this the correct balanced equation for magnesium ribbon reacting with hydrochloric acid to form hydrogen gas? 2Mg (s) + 2HCL (l) ----> H2 (g) + 2MgCl (aq) Also, I&#...
*September 25, 2007*

**AP Chemistry**

Thanks, sir. This is what I did, could you tell me if its correct? given value 1.072 g/meter 1.072 g/m X .02 m [the magnesium ribbon was 2.0 cm] = 0.02144 gMg Then to find the moles of H2: 0.02144 g mg ( 1 mol Mg/24.31 g Mg) (2 mol H2/1 mol Mg) = 1.76 X 10^ -3
*September 23, 2007*

Pages: <<Prev | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | **17** | 18 | Next>>