Wednesday

July 29, 2015

July 29, 2015

Total # Posts: 1,445

**chemistry**

Which of the following are empirical formulas? A) Ribose (C5H10O5) B) Ethyl Butyrate (C6H12O2) C) Chlorophyll (C55H72MgN4O5) D) DEET (C12H17ON) (numbers are subscripts)
*February 17, 2010*

**ecology**

examples of how humans have increased their food supply and what effects these methods have on the environment overall.
*February 16, 2010*

**chemistry**

How many grams of oxygen are there in 100.0 grams of water? What percentage of the mass of water is oxygen?
*February 15, 2010*

**chemistry**

Find the number of K atoms, C atoms, and O atoms in 95.5g of K2Cr2O7. (Potassium 2, Chromium 2, Oxygen 7).
*February 15, 2010*

**English**

they seem good to me
*February 15, 2010*

**chemistry**

consider the reaction in which 410 grams of Ca(NO3)2 react with just the right amount of lithium metal in a single replacement reaction. 1-how many grams of lithium are required? 2- how many grams of each product can be produced?
*February 15, 2010*

**mathhhh**

i have 78% in the course the exam is worth 30% and i got 65% what is my overall mark in the course
*February 4, 2010*

**math**

i have 78% in the course the exam is worth 30% and i got 65% what is my overall mark in the course
*February 4, 2010*

**math**

a trianglar course for a sailing race is marked off by buoys. The first lef is 250 meters longer than the second and the third leg is 100 meters shorter then the first. if the length of the course is 2500 meters, find the length of each length
*February 4, 2010*

**math**

the first side of a triangle is 8 meters longer than the second side. the third side is 3 times the second side. the perimeter is 128 meters. find the lengths of the three sides.
*February 4, 2010*

**chemistry**

The vapor pressure of dichloromethane, CH_2Cl_2, at 0 degrees celcius is 134 mmHg. The normal boiling point of dichloromethane is 40 degrees celcius. Calculate its molar heat of vaporization (in kJ/mol).
*January 31, 2010*

**History**

sue's answer doesnt help at all. thanks alot i failed
*January 26, 2010*

**History**

All of the following account for nativist sentiment against the New immigrants of the late 19th century EXCEPT that the immigrants a. practiced different religions b. had different languages and cultures c. were willing to work for lower wages than were native born workers d. ...
*January 26, 2010*

**science**

I added 40 mL of NaOH 1N to rise the pH of 10g teriphitalic acid from 5.3 to 6.3, so if I adde the same 40 mL of NaOH to 12g of the same acid what is the new pH will I have?
*January 22, 2010*

**science**

why does magnesium dissolve quicker in strong acid
*January 17, 2010*

**Physics**

Oop's, my bust. It's 60 Joules. I believe the 50m was thrown is a curve to throw me off, as as the '60J' = W. Otherwise it would have been say '60N over 50m = 3000J'. Thanks guys.
*January 17, 2010*

**Physics**

A car with a mass of 100 kg, with initial v = 1 m/s, has 60 Joules of energy added for 50 m. What is the final velocty? I'm using KE = 1/2 mv^2 to find initial KE. Then add 600 J to this for the final KE. Thus, W = KFf - KEi; KEf = W + KEi and KEf = 1/2mv^2 v^2 = (2(KEf))/m
*January 17, 2010*

**9th grade**

an egyptian form of writing
*January 14, 2010*

**Math**

How do you divide whole numbers?
*January 13, 2010*

**Math**

how do i compute a problem like 4/7 * 2/3 * 6
*January 5, 2010*

**Algebra**

15=2(9+4)+3
*December 31, 2009*

**math**

DQ sells 6 times as many orders of french fries as sonic everyday. If both sold 60 more orders DQ would only sell 3 times as many fries. How many do each sell before and after the incease?
*December 23, 2009*

**Pre-Cal**

Find the exact value of sec 60°tan135°-cot60°sin60°
*December 23, 2009*

**math**

The sweater shop projected income this year will be 69,000. That amount represents 40% of the shops annual sales. What is the shops projected sales
*December 22, 2009*

**math**

If I gross 2645.00 and taxed 31% how much do I bring home?
*December 22, 2009*

**math**

a wagon retails for 49.97 the store receives a built in 40% profit margin what is the cost
*December 21, 2009*

**math**

I can buy office supplies @ walmart with a 30/10 chain discount. If I paid $47.25 for adding machine. What was the regular price of my purchase? 30/10 chain discount means .70 x .90
*December 21, 2009*

**math**

I can buy office supplies @ walmart with a 30/10 chain discount. If I paid $47.25 for adding machine. What was the regular price of my purchase?
*December 20, 2009*

**solve for unknown**

thank you
*December 19, 2009*

**solve for unknown**

If jack does home improvment and price the material ,add 1 and 1/2 times that amount for labor and then quotes the job. If he gets the job for 17,000 how much is the material? and labor ?
*December 19, 2009*

**math**

wagons retail for $49.97. stores receive the wagons with a 40% profit margin. what is the cost?
*December 18, 2009*

**French**

What does conduissez mean in french?
*December 11, 2009*

**math**

Mr. Havel bought a car for $2400 and sold it for $2700. what was the percent of profit for Mr. Havel in selling the car?
*December 2, 2009*

**health**

for the health i get very good but my head alwas hrt so how do i do i don't know tell me why
*December 2, 2009*

**physics**

31^2+67^2=5186 sqrt(5186)=72.01388 ANSWER =72.01388
*November 27, 2009*

**science**

How does the portuguese man of war contribute to science?
*November 23, 2009*

**religious education**

please could someone help me answer this question - can science prove that God does exist? thankyou
*November 20, 2009*

**Math**

Thanks!
*November 18, 2009*

**Math**

I need help with an inverse function. If f(x)=3-x, I find the inverse function to be: x=3-y which is the same as y=3-x, same as the original. How can this be?
*November 18, 2009*

**physics**

A worker exerts a 140 N horizontal force on a 41 kg crate. The crate's acceleration across a level floor is 0.90 m/s2. Find the frictional force that the floor exerts on the crate.
*November 18, 2009*

**physics**

Suppose David Ortiz hits a home run which travels 361. feet (110. m). Assuming it left the bat at 50.°, how fast was it hit?
*November 12, 2009*

**psychology**

1)When conditioning takes place, behavior is associated with? a. ideas b. stimuli, consequences, or both c. events in the environment d. both b and c are answers. my first answer was b but this was wrong. Is the correct answer d? 2) In classical conditioning, the main ...
*November 11, 2009*

**Psychology**

1) The type of learning that involves reasoning, problem solving, language, memory, association of ideas, and other mental processes is Cognitive learning. Is this correct? 2) When you are figuring out how to memorize information for your college tests, you are engaging in ...
*November 11, 2009*

**physics**

answer.a car of mass 2000kg,increases its velocity from 10to 40 m\sec in time interval of 2 sec. calclate the force?
*November 11, 2009*

**science**

what are the chemical properties of scandium
*October 25, 2009*

**writing**

I'm writing an essay about a book I read, and I need to make a personal connection with a character that is conceited, brave, and strong. Could someone give some examples of personal connections?
*October 21, 2009*

**cathedral**

How do you figure out the space and volume ratio cube
*October 21, 2009*

**Physics**

if an obejct has an horizontal acceleration of -0.51 m/s squared and vertical acceleration of -7.683 m/s squared, what is the resultant acceleration?
*October 15, 2009*

**Accounting**

Do you help with accounting homework?
*October 12, 2009*

**Physics**

An object traveling at 5.0 m/s East has a mass of 6.0 kg. What is the magnitude of the object's momentum? I am not sure what the formula is for this one!
*October 11, 2009*

**science**

Do you think it would have been possible to know that living things are made up of cells without microscopes? Explain your thinking.
*October 7, 2009*

**Gen 105**

How can you use study techniques recommended for your personality type and strongest intelligence(s)to function best in distance learning enviroment
*October 5, 2009*

**Economics**

Is the Board of Governors influenced by Political Consideration?
*October 4, 2009*

**Math**

(4 x 1/2 + .87 + 17/16 + 22a -7.64 x 0.19 x 0 -1.87 + 3.1416) / 13
*September 28, 2009*

**math**

(6/7 x 4p + 3/4 - 8/19) (5p - 9x .88 x 0 /4) x 10%
*September 28, 2009*

**math**

(4 x 1/2 + .87 + 17/16 = 22a -7.64 x 0.19 x 0 -1.87 + 3.1416) / 13
*September 28, 2009*

**Algebra**

how to rewrite the expression using the inverse operation?
*September 27, 2009*

**english**

what are a list of Adverbs
*September 21, 2009*

**algebra**

Moon - 240000 mi Jupiter - 391000000. The space vehicle would take how many days to reach Jupiter? Saturday,
*September 20, 2009*

**Math**

Select the set of equations that represents the following situation: The sum of two numbers is 38, and their difference is twenty-six more than the smaller number. What are the two numbers?
*September 20, 2009*

**algebra**

How do you set this up as an equation? There is a total of 1600 cups and bowls. cups cost 1.90 and bowls cost 2.85. how many of each do you have if the bill was 3430.00. and that includes 105.00 saucer.
*September 10, 2009*

**Math**

I have $100.00 dollars to spend to buy 100 animals. Cows cost $50.00 each, sheep cost $3.00 each, pigs cost $2.00 each and chicks cost $0.10 each. How many of each do I need to buy to spend $100.00 dollars and have 100 aninals?
*September 9, 2009*

**statistics**

you are constructing a 95% confidence interval using the information: n = 50, xbar = 54.3, s = 2.1 and E = 0.65. What is the value of the middle of the interval?
*August 12, 2009*

**Environmental Science**

Stop looking to outside sources to do your school work you retard...figure it out for yourself
*August 8, 2009*

**penn foster**

explain how evalution and management e/m codes are grouped
*August 6, 2009*

**Literature**

The book Dracula can be substituted for which book read by the creature in the novel Frankenstein? Paradise Lost Ruins of Empires Plutarch's Lives Sorrows of Werter I think maybe Ruins of Empires but I am really not sure. The assignment is to substitute the reading ...
*July 29, 2009*

**Marine science**

Why is it beneficial that many predatory fish have larval and juvenile stages that feed at a low trophic level, while the adults feed at a tertiary or quaternary trophic level? My answer was that the larval and juvenile stages would get more energy but my teacher said that ...
*July 29, 2009*

**Literature**

I also need to find four different works that could be used to substitute the four that the creature read in the novel Franenstein which would change the creature. Does anybody know any websites that I could use to help me because I have no idea books to pick?
*July 28, 2009*

**Literature**

I need to know the four works that the creature in the novel Frankenstein read! Paradise Lost, Plutarch's Lives and Sorrows of Werter. I cannot remember what the last one is!!
*July 28, 2009*

**Marine science**

How has the Galapagos Tortoise changed or adapted over time?
*July 26, 2009*

**marine science**

How long has the Galapagos Tortoise been in existence?
*July 25, 2009*

**Math**

use the given zero to find all the zeros of the function. f(x) = x^3 + x^2 + 9x + 9 r = 3i I do not understand this!!
*July 15, 2009*

**Math**

Solve: (3-2) - (2-3)
*July 13, 2009*

**Math**

Find all the zeros of the function and write the polynomial as a product of linear factors. g(x)=x^5 - 8x^4 + 28x^3 - 56x^2 + 64x - 32 The zero I found so far is 2. I am confused on how to find the rest.
*July 12, 2009*

**Math**

Find a polynomial function with integer coefficients that has the given zeros. 0,0,4,1+i Please explain!! I am very confused.
*July 12, 2009*

**english**

A B C D
*July 12, 2009*

**english**

I just need help on this passage... To be a King, and wear a Crown, is a thing more glorious to them that see it, than it is pleasant to them that bear it: for my self, I never was so much enticed with the glorious name of a King, or the royal authority of a Queen, as ...
*July 12, 2009*

**math**

Find all the zeros of the function. f(x) = x^3 + 11x^2 + 39x + 29 I found one of the zeros = -1 but I am confused on how to find the other two.
*July 1, 2009*

**math**

Find all the zeros of the function. t^3 - 3t^2 - 15t + 125 Please explain. I am very confused on how to do this!!
*July 1, 2009*

**Physics**

I had to graph the following data and find the slope: Normal Force: Frictional Force: 0 0 2.0 0.6 6.0 1.8 9.0 2.7 10.0 3.0 The slope was 0.30. The question that I am confused on is what does this graph's slope represent?
*June 24, 2009*

**math**

Perform the operation and write the result in standard form. 1 + i over i - 3 over 4 - i Do I have to multiply top and bottom by i?
*June 10, 2009*

**math**

Perform the operation and write the result in standard form. 8 + 20i over 2i Please explain, I am very confused!!
*June 10, 2009*

**Science**

Crustaceans grow by doing what?
*June 7, 2009*

**English**

"Disguise" is stressed on the second syllable, not the first. (Don't know if this helps.)
*May 27, 2009*

**physics**

(Let me try to post that better, this site blocks URLs. "tinyurl" "." "com" "/oexysh")
*May 27, 2009*

**physics**

tinyurl (com) /oexysh (Do the same for the other terms.)
*May 27, 2009*

**physics**

F=MA=M*(v2-v1)/T where M=.15kg, v1=-36m/s, v2=45m/s, and T=.002s F=(.15Kg)*(45m/s-(-36m/s))/(.002s) F=(.15Kg)*(81m/s)/(.002s) F=(12.15Kgm/s)/(.002s) F=(6075Kgm/s^2) F=6075N
*May 27, 2009*

**Chemistry**

I got stuck.
*May 9, 2009*

**Chemistry**

You have a badly tarnished silver teapot. The tarnish is a result of the silver metal reacting with the oxygen in the air according to 4Ag(s) + O2(g) = 2Ag2O(s), Delta H = -62.2 kJ/mol You carefully clean the teapot and then, out of curiosity, you weigh it. The teapot has a ...
*May 9, 2009*

**physics**

thunder is heard 4.5 seconds after the flash of lightning is seen. How far away was the lightning flash and how long did it take for the light to reach him?
*April 10, 2009*

**physics**

so would it be (Iw^2)/(mv^2)?
*April 6, 2009*

**physics**

A projectile of mass m moves to the right with a speed vi. The projectile strikes and sticks to the end of a stationary rod of mass M, of length d, that is pivoted about a frictionless axle through its center. (a) Find the angular speed of the system right after the collision...
*April 6, 2009*

**math**

find the interval of convergence of the sum of ((x^1/2)/2 - 1)^k from k = 0 to infinity and within this interval find the sum of the series as a function of x. I know the interval is 0 < x < 16 but how do I get the sum?
*April 5, 2009*

**math**

thanks! i just found it in my notes too
*April 5, 2009*

**math**

what is the derivative of 2^x? I know that it's something with ln but I can't find it in my notes
*April 5, 2009*

**Chemistry**

Calculate the solubility of silver chloride in a solution that is 0.140 M in NH3.
*April 5, 2009*

**English**

where can I find a website for idioms tat are hard to find. An example is acts like a hotdog or full of soup.
*April 2, 2009*

**maths**

3 4 7 8 9 find the product of the smallest number
*March 15, 2009*

**Business Law**

one o the larger problems in doing business over the web is assuring electronic signatures. What are a few ways e-signatures might be more reliably authenticated?
*March 13, 2009*

**Business Law**

If all requirments of a negotiable instrument have been met except delivery. can/should payment depend solely on delivery? If so/not why?
*March 10, 2009*