Thursday
October 30, 2014

Posts by Ethan


Total # Posts: 160

Physics
A unit of area often used in measuring land areas is the hectare, defined as 104 m2. An open-pit coal mine consumes 99 hectares of land, down to a depth of 28 m, each year. What volume of earth, in cubic kilometers, is removed in this time?
January 12, 2011

social studies
Which mountain range is at 43 degrees north and 0 degrees?
January 12, 2011

math
Books never written
January 8, 2011

Physics
When an object is thrown into the air, relate it's mechanical energy to kinetic and gravitational energy.
December 14, 2010

Physics
Describe situations where no work is done and situations where work would be done?
December 14, 2010

earth science
I need to draw a diagram showing delta, oxalate, tributary and meander. I also need to draw a diagram showing water table, zone of saturation, cone of depression, working well, dry well, aquitard, aquifer, spring, perched water
November 11, 2010

english
swag
October 15, 2010

algebra 2
how do i solve x^4-13^2+40?
October 12, 2010

6th grade - EARTH SCIENCE
no
October 11, 2010

chemistry
A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed. If 100.0 mL of 1.5 M sodium phosphate solution is the limiting reactant, how many grams of calcium phosphate can be expected?
September 3, 2010

English Essay Title
That sounds like a good title! Thanks!
August 28, 2010

English Essay Title
What would a good essay title be if I'm writing an essay about a character in a book who is torn between two conflicting forces?
August 28, 2010

Books
Thanks!
August 23, 2010

Books
Homework Help!!! (Books)? I have a homework assignment and I really need help. I'll be very thankful and pleased if anyone can help. Compare the Adventures of Huckleberry Finn to The Glass Castle mainly the characters and the challenges they face through out each book. I ...
August 23, 2010

English
What are some good intepretive discussion questions for the book This Boy's Life by Tobias Wolff
August 14, 2010

Math11U
I don't know the answer, but I know that in this particular question the plane is flying at an altitude of 9750 metres.( The q. is in Nelson Functions 11 pg.319 #8)
July 21, 2010

geometry
Find the volume of a rectangular solid with the following dimensions: 2ã3 cm x 7ã5 cm x 4ã6 cm.
June 2, 2010

calculus
Find the fourier series of F(x) = 1, -L<=x<0 = 0, 0<=<L f(x+2L) = f(x)
April 27, 2010

social studies
were the colonists'protest sucessful
April 14, 2010

6th grade
what is the industrial revolution
February 25, 2010

math
y+2x=3, y+2x=-4
February 17, 2010

grammar
Thank you.
February 12, 2010

grammar
Where is the adverb located in the following sentence? "Timothy was not so sure that he liked Ethan as much now that he was being mean to everyone."
February 12, 2010

algebra
How would I find three different quotients that equal 5 to the negative 7th
February 5, 2010

writing
how can i answer the question...SHOULD NUTRALIZED CITIZENS BE PRESIDENT?
January 27, 2010

Math
go
December 7, 2009

math 156
what number is between 0.1 and 0.24
December 3, 2009

chemisrty
I have no idea how to do this activity..can someone please help!? In this activity you will investigate how chemical reactions are limited by the amount of reactants present. You will be using paper clips to represent atoms. You can describe the quantities of reactants and ...
November 16, 2009

science
For the reaction 2Na(s) + Cl(g) ¨2NaCl(s), how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl (at STP)?
November 13, 2009

science
Which of the following would be the limiting reagent in the reaction shown below? There are 50 molecules of O2 and 50 molecules of H2. 2H2(g) + O2(g) ==> 2H2O(g)
November 13, 2009

science
what is the volume of water ? how do I describe this ?
November 10, 2009

5th grade
show me examples of dot arrays
September 15, 2009

pre algebra
- 2 + 5 = +3
July 19, 2009

Math word problem
This is all I was provided. I don't get it either.
January 13, 2009

Math word problem
you buy a bottle of juice for $1.00. The juice costs 90 cents more than the empty bottle. How much does the empty bottle cost? The answer is not 10 cents.
January 13, 2009

biology
what oganic molecules provised structure for hair, nail, bones/cartilage
January 9, 2009

Math
I don't know :-)
October 14, 2008

chemistry
Sodium phosphate, Na3PO4, reacts with HCl to form H3PO4 and NaCl. How many liters of 0.1 M HCl are required to react with 0.1 mole of sodium phosphate?
October 13, 2008

physics
force=(mass)(acceleration) what is the acceleration?
September 24, 2008

physics
A 4.9 g bullet leaves the muzzle of a rifle with a speed of 332 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.85 m long barrel of the rifle?
September 24, 2008

12th grade government/economics
what is the period of dominance of federalists
August 24, 2008

Precalculus
Oh sorry, haha thank you for correcting me and thank you for helping me out.
July 30, 2008

Precalculas
how do i find the inverse of f(x)= (3x+7)/(x-2)
July 30, 2008

Art
Where does clay come from?
April 17, 2008

Calculus
x(squared)+8x+17 if x < or = -4 Let f(x)= 2 if x= -4 -x(squared)-8x-15 if x > -4 Show that f(x) has a removable discontinuity at x=–4 and determine what value for f(–4) would make f(x) continuous at x=–4. Must redefine f(–4)=____
April 15, 2008

chemistry
so Fe did that... im getting confused because i to oxidize means to lose electrons that makes it more positive and then reduction is actually the addition of electrons
April 15, 2008

Calculus
What is the limit as x approaches -1 of x - 5 --------------------- 4x(squared)-6x+ 3
April 15, 2008

Calculus- limits
never mind it was 12
April 15, 2008

Calculus- limits
f(x) = x + 7 if x < or equal to 5 F(x) = 7 if x >5 what is the limit as x is approaching 5 from the left side????? I know that the limit as x approaches to 2 does not exist and that the limit as x is approaching 5 from the right side is 7
April 15, 2008

US history
1. Which of the following justifications was not one of the proslavery arguments? a. Slavery offered a secure and certain life for slaves. b. Slavery involved only a very small number of slaves. c. Slavery assured an adequate labor supply for planters. d. Slavery influenced ...
December 29, 2007

Magnets-Physics
magnets attrac each other
November 6, 2007

Economics
Question on study guide that i don't get. Bill O’Really of OX News observed that poultry (chicken and turkey) consumption in the US increased dramatically over the 2000 to 2006 period. This he discovered was due to the fact that consumers, being more health conscious...
September 4, 2007

Macro Econ
Which of the following argues in favor of using Gross Domestic Product as a measure of economic well-being?
July 24, 2007

pre-cal
Simplify the given expression........? (2sin2x)(cos6x) sin 2x and cos 6x can be expressed as a series of terms that involve sin x or cos x only, but the end result is not a simplification. sin 2x = 2 sinx cosx cos 6x = 32 cos^6 x -48 cos^4 x + 18 cos^2 x - 1 I assume you are ...
May 17, 2007

pre-cal
find all solutions in interval [0,2pi] tan²x = -3/2 secx This question may look tricky, but its actually quite simple. First: rearrange the pythagorean identity tan²x+1=sin²x so that it reads tan²x=sin²x-1 Then replace the tan²x in the original ...
May 16, 2007

pre-cal
Find the EXACT VALUE of csc(-11pi/12) If that angle is in radians, it is easy. A full circle has 2PI radians...or 360 deg so 22PI/24 is the same as 22*15 deg, or -30 deg. The 30 deg triangle is well known. The sin is 1/2, so the csc is 2 Figure out the sign of the csc from ...
May 16, 2007

algebra
given two containers, one holding 4 gal. and the other holding 3 gal. how does one measure out two gal.? Fill the 3 gal, pour it in the 4 gal. Fill the 3 gal, then pout it int the 4 gal until filled. How much is left in the 3 gal? thank you bobpursley!!!!!!!!!!!
April 26, 2007

Finance/Math
1. Present Values. Compute the present value of a $100 cash flow for the following combinations of discount rates and times. a. r = 8 percent. t = 10 years b. r = 8 percent. t = 20 years c. r = 4 percent. t = 10 years d. r = 4 percent. t = 20 years 2. Future Values: Compute ...
March 19, 2007

English
help me pls.. How the puritans were different from the people of the Revolutionary period? WHo coined the phrase "There are many times that try men's souls"? Who felt God was on the colonists' side and would help them win the war? the choices fo WHO questions...
December 14, 2006

english
i've just read "The Crisis" and i can't answer the questions.. i don tget it... 1. Which passages in the excerpt of "The Crisis" no. 1 were especially stirring? 2. The phamplet opens with two famous images. What kinds of people does paine identify ...
December 3, 2006

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