Sunday

February 19, 2017
Total # Posts: 288

**Physics**

A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward?

*January 24, 2010*

**Physics**

This is a pretty simple physics problem, but I do not know how to go about it. How do I: Show that the time required for a projectile to reach its highest point is equal to the time for it to return to its original height?

*January 24, 2010*

**chemistry**

what is the difference between electron affinity and ionization energy?

*January 24, 2010*

**chemistry**

how does the length of time relate to the amount of heat absorbed?

*January 21, 2010*

**algebra II**

4 to the fifth power times 4 to the third power divided by 4 to the sixth power

*January 7, 2010*

**algebra II**

5 3 4 . 4 _______ 6 4 I really need help with this math..I don't understand it and all I have is a worksheet with no examples...I am a 10th grader...any help would be appreciated. Jeremy

*January 7, 2010*

**4th grade math**

the answer is 9

*January 7, 2010*

**math**

how many yards in 48 in. in decimal form rounding to the nearest hundreth

*December 14, 2009*

**literary**

Choose 3 selections from literature that are united into one topic or theme. Your topic can be united by subject, author, genre, style, etc. (requirement) Good speeches will have one clear main topic throughout. My topic is (Remembrance) Thanks for any help.

*December 10, 2009*

**chemistry**

I'm looking for the Lewis structure but not PbCl2. I need the Lezis Structure of PbCl3.

*November 24, 2009*

**chemistry**

What is the Leis Structure for PbCl3?

*November 24, 2009*

**computor programming**

is the design phase of a give project only as good as the analysis of the previous phase

*November 18, 2009*

**history**

How might have the maps indication of where Native Americans lived strengthened European claims of sovereignty?

*November 15, 2009*

**algebra**

14+x2 simplify

*September 1, 2009*

**Math**

Find the quotient 3(cos (5pi/12) + i sin (5pi/12) / 6(cos (pi/12) i sin (pi/12)). Express the quotient in rectangular form. I have no idea what I did but I got (1/4) - 433i/1000.

*August 17, 2009*

**Pre Cal.**

1. Identify the conic section represented by: 9y^2+4x^2 - 108y+24x= -144? Is it ellipse. 2. Find the coordinates of the vertex and the equation of the axis of symmetry for the parabola represented by: x^2 + 4x - 6y + 10 = 0. vertex: (-2 , 1) axis of symmetry: x = -2

*August 17, 2009*

**Pre Cal.**

Express 5sqrt(3) - 5i in polar form. A: 10(cos(11pi/6) + i sin(11pi/6)) Express 4(cos(3pi/4) + i sin(3pi/4)) in rectangular form. A: -2sqrt(2) + 2sqrt(2i Write 2x+y=5 in polar form. A: sqrt(5)= r cos (theta-27degrees) Are these correct?

*August 15, 2009*

**Pre Cal.**

The expression 81p^4 + 108 p^3 r^3 + 54p^2 r^6 + 12 pr^9 + r^12 is the expansion of which binomial? A: (3p+r^3)^4 The fifth term in the expansion of (3x^2-sqrt(y))^6 is _______. A: 135x^4y^2

*August 13, 2009*

**Pre Cal.**

Find three geometric means betwee -sqrt(2) and -4sqrt(2). A: 2, -2sqrt(2), 4 Is 6 sqrt(2)+ 6 + 3sqrt(2)+... a convergent series? A: Yes. Is 1 + 3(1/2) + 9(1/2)^2 + 27(1/2)^3 +... a divergent series? A: Yes. Are these right?

*August 13, 2009*

**algebra 2**

how do i find the radical notation of 25 -1/2?

*March 22, 2009*

**Latin**

In what instances do you use the nominative for the word preceding "of the," in oppose to the genitive. For example, in some of my sentences, I have the nominative, like "Forma terrae in Sicilia plana non est." But other times, it is genitive "Curae ...

*March 16, 2009*

**Latin**

Multi Romani copiam aquae in carris spectant. Would this translate to "Many Romans see the suply of water in the carriages?" Thanks, hopefully this will be the last question.

*March 16, 2009*

**Latin**

The sentence is: Agricolae equi in reginae terra (with a macron) sunt. The answer is "the farmer's horses are on the queen's land." What ending are you supposed to use for something following an 's or s'? Doesn't this sentence use two different ...

*March 16, 2009*

**Latin**

Oh whoops I forgot the translation for 2. I said "Many servants on the island are big."

*March 16, 2009*

**Latin**

Would you mind checking my translations of these? 1. Silvas claras insulae magnae spectatis. You (plural) see the clear forest of the large island. I wasn't sure if I properly did the "of" part. 2. Numerus servorum in insula erat magnus. I said this meant Numerus...

*March 16, 2009*

**CALCULUS**

Use the Midpoint Rule to approximate the integral: (10x-3x^2)dx from -1 to 5 with n=3

*January 18, 2009*

**math 115 9.4 #80**

(-3)^3-(-8)(-2) = (-27)-(+16) = -11

*December 29, 2008*

**The court system**

I think that what it is telling you to do is to write 1400 words about how some poeple think that the court systen can be funny, like in a television show, compared to how serious it is in real life.

*November 29, 2008*

**Business Math**

with limited information I can only tell you that to find the end of day balance you have to add up your accounts received and accounts payable, your sum of items taken in....subtract any money that was given out (accounts payable) from the sum of money received.....if you ...

*November 29, 2008*

**English- vocab**

I think you were right. It could be mystery. It could also be phenomenom.

*November 28, 2008*

**chem**

[Xe] 4f14 5d10 Always follow this pattern: 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s...

*November 23, 2008*

**Chem**

No problem!

*November 23, 2008*

**Chem**

Use a bomb calorimeter... or some kind of calorimeter... I'm just guessing; hopefully the calorimeter idea isn't stupid! Good luck.

*November 23, 2008*

**chemistry**

The double-slit experiment shows that it acts as both a wave and a particle. Look that up on google or something for more information.

*November 23, 2008*

**Algabra**

5/a=?/a^2 5a^2=a? 5=(a?)/a^2 5=?/a or 5a=? or a=?/5 If that's what your question is asking for, I hope that helps.

*November 23, 2008*

**physics**

The bowling ball and the volleyball will have the same acceleration. I'm not exactly sure about the car thing, but it's probably because the front meets the most air resistance, pushing it down while accelerating, and when it brakes, the air resistance in the front is ...

*November 23, 2008*

**physics**

If I'm not mistaken, it's 9.097155832 grams, which you can round as you see fit. 913.5 J = m x specific heat water x 24 degrees Celcius. Specific heat of water is 4.184 J/(gC). Solve for m.

*November 22, 2008*

**Math**

Use the formula x = negative b, plus or minus the square root of b squared minus four ac, all of which is divided by 2a. Formula: [-b+/-sqrt(b^2-4ac)] / 2a

*November 22, 2008*

**2nd grade**

Time machine.

*November 22, 2008*

**physics**

heat = mCpTsub(f-i) 609 J = (1.2kg)(4184 J/kgC)(Tf - Ti) [609 J/ [(1.2kg)(4184 J/kgC)]] -5C = Tf Tf = -4.87... degrees C. for part A For Part B: Use the same equation, except multiply heat by 3. Solve for the new mass, then divide that mass by the old mass (1.2kg) to get the ...

*November 22, 2008*

**chemistry**

I disagree with Dr. Russ's method. Use PV=nRT, where P=2.3atm, V=120L, n= unknown moles, R= .08205, T=340K. Solve for n to get 9.9 mol gas. Without significant figures, n=9.893536939.

*November 21, 2008*

**physical science**

what are the general properties of an acid an a base

*November 5, 2008*

**science**

a protist kingdom are animals which have mostly one cell, microorganisms and reproduce by splitting in two. Animal kingdom are animals which have many cells and reproduce with eggs thay either grow inside the body or outsidethe body

*October 13, 2008*

**algebra**

The number of students attending the fall play was 150 more than the number of adults attending. Students tickets cost $3, and adult tickets cost 45 . A total of $4730 was collected. How many students attended the play? this is what i have, but i need help on the equation. let...

*October 13, 2008*

**7th grade pre algebra**

What is the difference between bar graphs and histograms.

*August 27, 2008*

**science**

I am trying to find out about the internal organs of the mealy bug and a drawing of a male and a female

*May 18, 2008*

**Math**

What is the length of the longest rod that can be placed in a hollow cube of side 10 feet? in this problem we are supposed to use Pathagorem Theorm.

*May 8, 2008*

**Algebra II**

1. -7

*May 4, 2008*

**Math**

How do you a equation like: 4x + X +2(42-6)-23 + 5x =81 _ 2

*May 3, 2008*

**math**

An isosceles triangle automatically has 2 equa; sides. So if you can fin the length of the sides then that will prove that they are equal.

*April 17, 2008*

**geometry**

1. Find the area of the square. 2. Find the area of the circle. 3. Subtract the area of the square-area of the circle.

*April 17, 2008*

**English grammar**

I think the first and third one are correct.

*April 16, 2008*

**math**

I think, but i'm not sure that it is 700,000

*April 15, 2008*

**algebra**

You plug in one value as 'x' to find 'y'. or vice versa. ex. y=2x I will use 1 for x 2*1=2 so, y=2 WHen you plot this on a graph you plot it as (1,2). 1 being on the x-axis, and 2 on the y-axis.

*April 15, 2008*

**Biology**

Kingdom

*April 15, 2008*

**algebra**

also you can first find y in the equation(s), and then find the slopes, and finally multiply the slopes.

*April 15, 2008*

**algebra**

Perpendicular lines are lines that intersect to form a 90 degree angle. What is the equation you are doing?

*April 15, 2008*

**Math**

x+2 x+2 --- Divided by --- x-5 x-1

*April 15, 2008*

**math**

solve x-3y=9 3x+y=7

*April 15, 2008*

**math**

ok. but how would you write an equation for that?

*April 15, 2008*

**math**

If a bottle and a stopper cost $1.10. How much does the stopper cost.

*April 15, 2008*

**math**

If a bottle and a stopper cost $1.10. How much does the stopper cost.

*April 15, 2008*

**math**

yes you are correct

*April 15, 2008*

**French**

What is a reseau sementique

*March 25, 2008*

**Calculus**

I'm not sure how to solve the equation 5^x-12*(5^-x)-1=0

*March 23, 2008*

**algebra**

gc monitor

*March 11, 2008*

**Math Linear Programming**

I need to find out the constraints and the variables so that I can input and solve in excel or management scientist. I don't know how to configure this information, can someone help me? Tots Toys makes a plastic tricycle that is composed of three major components: a ...

*February 26, 2008*

**the novel**

After having lived with her for a year, Chad studied Marilou's eyes across the table, realizing he had never had a clue about what make her tick." This sentence from a hypothetical novel suggests what kind of narrative voice

*February 20, 2008*

**chemistry**

I am a gc monitor.

*February 19, 2008*

**chemistry**

Luly, This is a gcu question, right?

*February 19, 2008*

**chemistry**

luli, we are suppose to figure this out on our own!

*February 18, 2008*

**Math- consecutive intigers**

-10,-9,-8,-7,-6,-5,-4,-3,-2,-1.0,1,2,3,4,5,6,7,8,9,10

*February 18, 2008*

**Jeremy: read this**

sorry

*February 7, 2008*

**Algebra**

what is n? 3 n -+- =2 8 4

*February 7, 2008*

**Math**

The answer is 224

*February 7, 2008*

**Algebra**

How do I solve this: 3 n - + - =2 8 4

*February 7, 2008*

**7th grade geometry**

define volumen .define surface area.how i find the surface area of the prism?

*January 28, 2008*

**science**

What kind of streams form v-shaped valleys? Streams that are first forming,streams that move slowly, streams that have meanders?

*December 6, 2007*

**American History**

What were the causes of the war of 1812?

*November 14, 2007*

**Math**

can someone please explain to me how to do place values ant the powers of ten

*August 23, 2007*

**Science Check**

would it be 55

*March 9, 2007*

**Chemistry**

Can Someone explain the physical properties of metals, using the theory of metallic bonding There is a lot of reading here, most of it not what you are looking for, so scroll down ABOUT half way and you will come to a paragraph that explains conduction of metals as the metal ...

*November 16, 2006*

**Science**

You would end up with a cell that contained more than one nucleus. This is because all the nucleur material will be split but the cytoplasm wasn't.

*November 5, 2006*

**prokaryotic/cells**

We just got through with a lab and we looked at ecoli, anabaena. There first section is prokaryotic cells and the question is did all living cells you saw in the lab contain mitochondrion. I know mitochondrion is the energy powerhouse of the cell but see nowhere in the first ...

*October 1, 2006*

**math (algebra)**

Hi. At the sit for mcgraw hills algebra 1 book (website URL is obvious), but don't have a name or password! Could somebody please lend me theres? post it here! Viit Viit! Your teacher needs to register you. http://www.glencoe.com/sec/math/ose/index.html

*September 7, 2006*

**social studies**

Does anybody know a city or town that starts with x? world-gazetteer . com My student atlas shows several towns beginning with X -- including: Xankandt, Azerbaijan Xenia, Ohio, U.S. Xiaguan, China Xichang, China

*June 15, 2005*