Thursday

February 11, 2016
**chemistry**

Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=2.091 A˚. What is the maximum wavelength (in meters) of radiation capable of...
*Sunday, November 18, 2012 by selly*

**chimistry**

Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=3.591 A˚. What is the maximum wavelength (in meters) of radiation capable of...
*Sunday, November 18, 2012 by School girl*

**chemistry**

Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=5.091 A˚. What is the maximum wavelength (in meters) of radiation capable of...
*Saturday, November 17, 2012 by amar chauhan*

**chemistry**

Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=5.591 A˚. What is the maximum wavelength (in meters) of radiation capable of...
*Saturday, November 17, 2012 by amar chauhan*

**science**

Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=3.591 A˚. What is the maximum wavelength (in meters) of radiation capable of...
*Saturday, November 17, 2012 by hi*

**6th grade math**

What does this sign mean "| |"
*Monday, November 5, 2012 by luv history*

**6th grade math**

What does this sign mean "| |"
*Monday, November 5, 2012 by luv history*

**Geo- 7th Grade**

What are the Atlantic Provinces?
*Friday, November 2, 2012 by rawr... im a dinosaur.... rawr *

**English**

1. At Thanksgiving Americans eat a roast turkey. 2. On Thanksgiving Americans eat a roast turkey. (Which preposition, do we have to use 'at' or 'on' before 'Thanksgiving'? Are both OK?) 3. on/at the weekend 4. on/at Sunday 5. on/at New Year's Day 6...
*Wednesday, October 31, 2012 by rfvv*

**Algebra Grade 7**

Point S is the midpoint of RT. compplete the statement: ST = 11 in., RT = __
*Saturday, October 27, 2012 by rawr... im a dinosaur.... rawr *

**math**

how to solve identity property,2nd grade
*Wednesday, October 24, 2012 by tyler*

**Math Statistics**

The table below shows Rico’s grades during the third term in four subjects. Subject Units Grade Math 1.5 98 Science 2 97 English 1.5 95 A.P. 1 99 What was Rico’s average grade in the four subjects?
*Friday, October 19, 2012 by Milen*

**Statistic**

Number of Absences Final Grade 0 93 1 93 2 77 3 68 4 65 5 54 - Find the correlation coefficient for the data. I got this part of my answer. I believe the answer to be -0.9767 I am just going crazy with the second part. - Find the equation for the regression line for the data, ...
*Thursday, October 18, 2012 by Ashley S*

**math 7th grade**

what is 234(2-1+1092-924+18) ?
*Thursday, October 18, 2012 by allie*

**lens surface**

A spherical generator is used to produce a -15.00D surface on glass of refractive index 1.80. The diameter of the cutting tool is 80mm and the radius of the cutting surface is 4mm. What is the angle between the axis of the tool and the axis of the lens? Do I calculate the ...
*Thursday, October 18, 2012 by kelly*

**4 grade math**

what the rule for 58,-2
*Sunday, October 14, 2012 by Monta*

**c++**

Your Mathematic school teacher want to use a program that can read the name and the mark of a student. Your teacher want the program to automatically find the grade of the mark and display the result(name, mark and grade). Help your teacher to develop a program that can solve ...
*Thursday, October 11, 2012 by sarah*

**7th Grade x y input output tables**

i need help with x and y input output tables for 7th grade i dont understand what 5x means or what to do! Math hw problems: 1. y=4x+3 x=1,2,5,10,20 2.d=3.5t t=1,2,5,10,20 Please help ASAP!!!!!
*Tuesday, October 9, 2012 by Sadie*

**Math 4th grade**

How do you find the properties of addition?
*Tuesday, October 9, 2012 by Penny*

**ELEMENTARY**

How to prepare PSAT test from 3rd grade
*Monday, October 8, 2012 by josh*

**statistics**

You are given the following data. Number of Absences Final Grade 0 95 1 91 2 82 3 69 4 67 5 58 - Find the correlation coefficient for the data. - Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
*Thursday, October 4, 2012 by mom*

**7th grade math help quick**

11/12 + (-2/3) = ?
*Wednesday, October 3, 2012 by Delilah*

**MATH**

tHERE ARE 4 FIFTH GRADE CLASSES IN A SCHOOL. EACH CLASS Has 24 STUDENTS. fOR EACH GYM PERIOD, TWO FIFTH GRADE CLASSES TAKE GYM TOGETHER. tHERE ARE 10 GYM PERIODS IN ALL DURING SCHOOL WEEK. wHAT INFORMATION IS NOR NEEDED TO FIGURE OUT HOW MANY TOTAL STUDENTS TAKE A GYM PERIOD ...
*Monday, October 1, 2012 by lhyza*

**biology**

what statement describes the 1st step of ecological community it is known as? A. reed plants attract dragonflies and mayflies. B. frogs and snakes arive after emergent plants are established. C.climax trees such as ash and beech appear and eventually dominate the area. D. ...
*Monday, October 1, 2012 by tameka*

**2nd grade math**

____= 8+2?
*Wednesday, September 26, 2012 by todd*

**math**

5th grade equstions
*Tuesday, September 25, 2012 by erickka*

**6th grade math **

what does the |#| mean? Thanks
*Sunday, September 23, 2012 by luv history*

**6th grade math**

Simplify: |15|
*Sunday, September 23, 2012 by need help*

**6th grade math **

What is absolute value?
*Sunday, September 23, 2012 by luv history*

**6th grade math**

Yes I am not smarter than a 6th grader. How do I show the math and in the simplest form for the following: A sixth grade class has 100 sheets of lightweight paper. They use 3/4 of the paper for a collection of class poems. What is the total thickness of the paper they use?
*Monday, September 17, 2012 by dad pulling out his hair*

**6th grade science**

What is porosity and permeability? Thanks
*Sunday, September 16, 2012 by Allison*

**6th grade science **

What is a A topographic map used for? thanks
*Sunday, September 16, 2012 by Allison*

**7th grade math**

What is the difference? |-9| - |13| =? A)-22 B)-4 C)4 D)22
*Sunday, September 16, 2012 by Lauren*

**6th grade math **

9 + x = 17 I know that x=8 but how did you get it Thanks
*Friday, September 14, 2012 by some girl*

**6th grade math **

What is base measurement? thanks
*Friday, September 14, 2012 by some girl*

**7th Grade Math**

(-13) + (-1)
*Friday, September 14, 2012 by Lauren*

**writing**

who knows any 5th grade transition words?
*Wednesday, September 12, 2012 by jessica*

**math**

randall opened a savings account on June 1st and made the following deposits: $212.19, June 5th $23.03, June 12 $307.15, June 19th $652.00 and June 30, $78.75. Assuming he made no withdrawals, approximately how much did he have in the savings account at the end of the month of...
*Tuesday, September 11, 2012 by Melinda*

**6th grade math**

f + (–15) = –32
*Tuesday, September 11, 2012 by Allison *

**math**

I'm in sixth grade What is the value of |–46| ?
*Monday, September 10, 2012 by Allison *

**math**

y – (–19) = 25 i'm in sixth grade
*Monday, September 10, 2012 by Elizabeth *

**Math**

A year on Mars is 686 Earth Days. (1) Which is longer, a year on Mars or a year on Earth? (2)By how many weeks is it longer? Submit two answers. Please explain how you got the answers. My 1st answer was Mars the 2nd answer I 82 1/2 weeks. Please help
*Wednesday, September 5, 2012 by Nakia*

**5th grade math**

Which is more 0.33 or 0.333?
*Tuesday, September 4, 2012 by Colby*

**7th grade math**

-6(2r-4)
*Tuesday, September 4, 2012 by nic*

** 6th grade math**

what is 13/16 minus 1/4?
*Tuesday, September 4, 2012 by Al*

**9th grade chemistry**

what is the
*Monday, September 3, 2012 by simia *

**Business and math question**

Isabella is hoping to get an A on her college algebra course. With just the final exam left to take, she currently has an average of 92 on her exercises. The quizzes count for 40%, exercises count for30% of the class grade. What is the minimal grade that Isabella must have on ...
*Thursday, August 30, 2012 by John*

**Business**

Isabella is hoping to get an A on her college Algebra course. With just the finaL exam left to take, she currently has an average of 85 on her quizzes and average of 92 on her exercises. The quizzes count for 40%, exercises count for 30% of the class grade. What is the minimal...
*Thursday, August 30, 2012 by John*

**english 3 grade**

aphabet on move words
*Wednesday, August 29, 2012 by edwin*

**Economics**

Brian is taking three courses this semester: economics, statistics, and finance. He has decided to spend 19 hours per week studying (in addition to attending all his classes) and his objective is to maximize his average grade, which means maximizing the total of his grades in ...
*Monday, August 27, 2012 by Rey*

**5th grade english**

is cactus already plural
*Thursday, August 23, 2012 by brooke*

**9th grade algebra/Ms Sue**

Okay Ms. Sue. I am in 8th grade but I am taking Algebra with 9th graders. I am very confused with my previous problem. I have asked my Dad but we are both getting confused. Now I have come up with 22. Is this my correct answer?
*Wednesday, August 22, 2012 by Reed*

**Math 5 grade**

3/4 [5/2] The answer would be 15/8. Right?
*Tuesday, August 21, 2012 by Shan*

**math**

My son is in Kindergarten and I have no idea about the "Counters" in the question: 1st) Cover the teddy bears in the top row with different-color teddy bear counters. 2nd) Color the teddy bears in the bottom row to show the colors." Help. Thanks You.
*Tuesday, August 14, 2012 by Laura*

**CTU**

Part IV: You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate of 9% interest that ...
*Monday, August 13, 2012 by Johjoh*

**Physics**

Upon a flat only 10 m high (Is that possible?) there are two guns A and B attached together making a vertical angle of 60 degrees when A is flat on roof. They fire at the same time and has the same reloading time. Both guns are capable of giving an initial velocity of 5√...
*Friday, August 10, 2012 by Imalka*

**biology**

Trophic Level Cylinder Volume of H2O Volume of Oil Total Volume % Oil 1st 1000 ml 1000 ml 2nd 100 ml 100 ml 3rd 10 ml 10 ml
*Thursday, August 9, 2012 by kiesha*

**Reimbursement Methodologies Final Exam**

Can anyone please help me with Part A with the 1st question: You're the new director of a hospital health information management department. The chief financial officer has hired you for your experties in health care reimbursement and needs to know how your department can ...
*Friday, July 20, 2012 by Priscilla*

**math grade 12**

how to solve log basex 8=-1/2 pls help
*Tuesday, July 17, 2012 by ted*

**math**

not sure if this had to do with math but my professor gave us this last hw assignment that i don't understand at all. It has to do with the grade scaling he does. 4x Exams = 37450 HW = 9362 Final = 16385 Lab = 23407 Recitation = 7022 Total Points = 93626 He asks whats the ...
*Thursday, July 5, 2012 by Anonymous*

**payroll**

An employee's rate of pay is $40.00 per hour, with time and a half for all hours worked in excess of 40 during a week. The following data are available: Allowances claimed on W-4 4 Allowance amount allowed:$70 ea. Hours worked this week 50 Y T D Earnings prior 105,200 F I ...
*Sunday, July 1, 2012 by jim*

**Foreign languages**

Writeacher, can you please check these sentences? Thank you. 1 Talk about the place where you live using the following grid: . – What is your town like – How long have you lived there – if you like it or not and why – If you don’t like it where you ...
*Thursday, June 21, 2012 by Mike*

**Calculus grade 12**

hi i need help differentiating these.. 1. y = cos(3x^2 + 2x) 2. y = ln(3x^2 + 5) thank you
*Thursday, June 21, 2012 by Albert*

**us history grade 7**

what are the pros and cons of the fur trade?
*Thursday, June 21, 2012 by kyle*

**Art**

Who is the artist of the Ngady Mwaash Mask (search on yah oo, then click images, it should be the 4th one) and the artist of the Sowo Mask, (same thing, go to yah oo search the name then click images, and it should be the 1st one)
*Sunday, June 17, 2012 by Anonymous*

**math**

In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 16% of your total grade, each major test is worth 21%, ...
*Sunday, June 3, 2012 by Ashley*

**9th Grade Algebra**

4x^2-11x+3=5x+4 How do I solve this?
*Thursday, May 31, 2012 by hockeyfreak2011*

**Algebra**

The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, and 140 points in the second half of the course. If a student earns 81% in the first half of the ...
*Monday, May 28, 2012 by Vilma*

**Calculus grade 12**

7. Where does the line r = (1, 2, -5) + t (2, -3, 1) meet the plane 2x + 5y - 3z = 6?
*Saturday, May 26, 2012 by j*

**11th grade math**

-2x+7+9x-4
*Thursday, May 24, 2012 by sky'toria*

**8 grade**

27.6 x 5.2 my answer is 138.00 is this right
*Monday, May 21, 2012 by codey*

**8th grade math**

how do you solve x+1/10= a whole number
*Monday, May 21, 2012 by sam*

**Calculus**

A Baseball Diamond has the shape of a square with sides 90 feet long. a player is running from 1st to 2nd base at a speed of 25 feet per second. find the rate at which his distance s is from home plate is changing when the player is 20 feet from 2nd base.
*Sunday, May 20, 2012 by John*

**6th grade history**

Where did the mound builders live???
*Saturday, May 19, 2012 by Aria *

**6 grade math**

Can you help me with this integer problem? -8+6+(-10)+(-2)*(-10) is it 8????
*Tuesday, May 15, 2012 by unknown*

**Math**

first three terms of a geometric sequence are the same as the 1st, 9th and 11th terms of an arithmetic sequence, respectively. What is the common ratio in the geometric sequence ? Thanks!
*Saturday, May 12, 2012 by Matthew*

**2nd grade math**

4/6 of 18 is?
*Monday, April 30, 2012 by Joei*

**statistics**

assume adults have an IQ score that are normally distrubted with a mean of 105 and standard deviation of 20 A) find the percentage of adults that have an IQ between 94 and 116 B) find the percentage of adults IQ exceeding 120 C)Determine the 1st, 2nd, and 3rd quartiles for ...
*Friday, April 27, 2012 by VICTORIA*

**Math**

After a Math test, each of the twenty-five students in the class got a peek at the teacher's grade sheet. Each student noticed five A's. No student saw all the grades and no student saw his or her own grade. What is the minimum number of students who scored A on the ...
*Thursday, April 26, 2012 by Rezu*

**to ms.sue**

thank you. how do you know im in 4th grade?
*Tuesday, April 17, 2012 by Celest*

**grade 6 math**

how many rectangles can have the perimiter of 46m
*Monday, April 16, 2012 by tony*

**reading**

the purpose of the 1st paragraph is to introduce the topic of seals washing ashore in large numbers this year that's what i put, give details about how animals are treated at the center, come to conclusion about why so many seals have washed ashore this year or explain the...
*Sunday, April 15, 2012 by Gabby ( 5 grade)*

**Chemistry**

Draw a reaction profile (diagram of energy vs reaction coordinate) for a hypothetical reaction AB +C <=> A+BC in which the foward reaction has an activation energy of 100kJ mol-1 and the backward reaction has an activation energy of 75kJ mol-1. (ii). a catalyst ...
*Saturday, April 14, 2012 by Crystal*

**Chemistry lab**

1) Using the 1st equivalence point from part a calculate the molarity of the phosphoric acid. Molarity of NaOH = .1523 M Volume of phosphoric acid used 10.0mL Volume at equivalence point 7.410 mL and 14.861 mL 2) Using the 2nd equivalence point from part a, calculate the ...
*Wednesday, April 11, 2012 by Maura*

**Math 8th Grade**

What is the y-int of the graph of 4x+2y=12
*Tuesday, April 10, 2012 by Lana Von Monroe*

**Social Studies 7R - Bill of Rights Project**

I have a project for social studies that is due when we come back from break (4/16/12). Choose one of the projects listed below to show your understanding of one or more of the following Amendments 1, 2, 3, 4, 5, 6, 7, and 8 to the Constitution: I choose one and I can easily ...
*Monday, April 9, 2012 by Laruen *

**Chemistry**

A solution contains 0.0500 M Ca2 (aq) and 0.0350 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca2 (aq) can be separated from the Ag (aq) by selective precipitation? -Solving the 1st one I got [Ca2+]= 5.03x10...
*Friday, April 6, 2012 by Jematormal91*

**Health: 6th grade**

What do you do if someone needs a splint?
*Wednesday, April 4, 2012 by Losa*

**Math**

If I missed 24 problems out of 40, what is my grade?
*Tuesday, April 3, 2012 by Mattie*

**Math**

Of the 300 tickets 240 were sold to sixth grade studentss What percent of the total number of tickets sold were sold sixth grade students
*Saturday, March 31, 2012 by Leslie*

**6th grade history**

how did athens become rich?
*Thursday, March 29, 2012 by katrina*

**6th grade math**

35/(2+5)(2^3)-15
*Wednesday, March 28, 2012 by Katie*

**Math 141**

You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate of 9% interest that compounds ...
*Tuesday, March 27, 2012 by Sherry*

**statistics**

Calculate the z-score for each set of data. Determine who did better on her respective test, Tonya or Lisa. Student English Test Grade z-Score Student Math Test Grade z-Score John 82 Jim 81 Julie 88 Jordan 85 Samuel 90 Saye 79 Tonya 86 Lisa 82 Mean 86.50 81.75 St. Dev. 3.42 2...
*Thursday, March 22, 2012 by Anonymous*

**Physics**

Belinda needs to find the center of mass of a sculpture she has made so that it will hang in a gallery correctly. The sculpture is all in one plane and consists of various shaped uniform objects with masses and sizes as shown. The length of the rectangle is L = 1.4 m and the ...
*Sunday, March 18, 2012 by Priyanka*

**4th grade math**

what is 5/6 of 288
*Monday, March 12, 2012 by zoe *

**4th grade math**

what is 5/6 of 288
*Monday, March 12, 2012 by zoe *

**Chemistry**

h2c4h4o4 + 2naoh --> 2h2o + na2c4h4o4 as for the previous question im sorry i forgot to plug the maleic acid in the formula properly. so this ones it ^ .2213 of c4h4o4 used (maleic acid) and .1 M NaOH 1. show the equation for 1st and 2nd ionization 2. find molecular mass of...
*Monday, March 12, 2012 by Ruby*

**Math - HELP !**

there are 50 students in the seventh grade , 62 percent of these students are involved in the drama club.how many seventh grade students are in the drama club ?
*Saturday, March 10, 2012 by Remy *

**Math**

The height of a ball t seconds after it is thrown upward from a height of 6 feet and with an initial velocity of 80 feet per second is f (t) = -16t^2 + 80t + 6. According to Rolle's Theorem, what must be the velocity at some time in the interval (2, 3)? ft/sec? & Find that...
*Thursday, March 8, 2012 by Angelina*