# Posts by ethan

Total # Posts: 264

**Physics**

Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century. In 72 centuries, what is the total (in hours) of the daily increases in time (that is, the sum of ...

**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?

**social studies**

Which mountain range is at 43 degrees north and 0 degrees?

**math**

Books never written

**Physics**

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

**Physics**

Describe situations where no work is done and situations where work would be done?

**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

**english**

swag

**algebra 2**

how do i solve x^4-13^2+40?

**fractured math definitions**

Coincide. A pun on go inside

**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?

**English Essay Title**

That sounds like a good title! Thanks!

**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?

**Books**

Thanks!

**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 ...

**English**

What are some good intepretive discussion questions for the book This Boy's Life by Tobias Wolff

**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)

**geometry**

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

**calculus**

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

**social studies**

were the colonists'protest sucessful

**Algebra 2**

Yes

**6th grade**

what is the industrial revolution

**math**

y+2x=3, y+2x=-4

**grammar**

Thank you.

**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."

**algebra**

How would I find three different quotients that equal 5 to the negative 7th

**writing**

how can i answer the question...SHOULD NUTRALIZED CITIZENS BE PRESIDENT?

**Math**

go

**math 156**

what number is between 0.1 and 0.24

**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 ...

**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)?

**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)

**science**

what is the volume of water ? how do I describe this ?

**5th grade**

show me examples of dot arrays

**pre algebra**

- 2 + 5 = +3

**Math word problem**

This is all I was provided. I don't get it either.

**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.

**biology**

what oganic molecules provised structure for hair, nail, bones/cartilage

**Math**

I don't know :-)

**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?

**physics**

force=(mass)(acceleration) what is the acceleration?

**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?

**12th grade government/economics**

what is the period of dominance of federalists

**Precalculus**

Oh sorry, haha thank you for correcting me and thank you for helping me out.

**Precalculas**

how do i find the inverse of f(x)= (3x+7)/(x-2)

**Art**

Where does clay come from?

**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)=____

**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

**Calculus**

What is the limit as x approaches -1 of x - 5 --------------------- 4x(squared)-6x+ 3

**Calculus- limits**

never mind it was 12

**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

**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 ...

**Magnets-Physics**

magnets attrac each other

**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...

**Macro Econ**

Which of the following argues in favor of using Gross Domestic Product as a measure of economic well-being?

**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 ...

**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 ...

**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 ...

**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!!!!!!!!!!!

**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 ...

**IS ANYONE IN THIS WEBSITE? I NEED HELP MATH H.W.**

The Answer is 34. Hint: try calculating two numbers at a time (ex. 59 minus 10= 49 then do 49 minus 15 = 34.

**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...

**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 ...