Tuesday

July 28, 2015

July 28, 2015

Total # Posts: 885

**AP Chemistry**

Consider a 50.4 g sample of H2O(g) at 115°C. What phase or phases are present when 156 kJ of energy is removed from this sample? Specific heat capacities: ice, 2.1 J/g·°C; liquid, 4.2 J/g·°C; steam, 2.0 J/g·°C, ÄHvap = 40.7 kJ/mol, &...
*November 28, 2008*

**Chemistry**

Hi everyone, I'm having problems with effective nuclear charge. Regarding these problems. Calculate Zeff for a valence electron in an oxygen atom. and Calculate Zeff for the 4s electron in a copper atom, . and Calculate Zeff for a 3d electron in a copper atom, Cu. Like for...
*November 9, 2008*

**urgent Help .. Chemistry**

If you assume that an atom is a hard sphere, you can estimate the average volume of space it occupies using basic geometry. Estimate the volume,V , of one sodium atom (Na) using its metallic radius of 186 pm . Express your answer in cubic picometers.
*November 9, 2008*

**chemistry**

reaction between CuSo4+NaCl
*November 4, 2008*

**physics**

A 2 gram bullet traveling at 1500 m/s [East] hits a 200 g block of wood at rest, and becomes embedded in it. If the block is suspended by long ropes, how high will it travel before it comes to rest?
*November 3, 2008*

**social studies**

What was the type of ship that Hernando Cortes sailed? Thank you.
*October 26, 2008*

**College Physics**

Yeah this is from a physics lab. It was for a "Energy Works" lab where we trying to proof conservation of energy. Total energy = KE + Ug. We had a 2.2m long Dynamics Track with Dynamics cart. We used a "riser block" which was a wooden block to raise the ...
*October 25, 2008*

**College Physics**

Let's say you measure an average acceleration to be 0.3883 ms-2. What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs. cm Use three ...
*October 25, 2008*

**7th grade science**

....... capacity is the largest numbers of individuals of one species that an ecosystem can support over time. What kind of capacity???
*October 22, 2008*

**Science**

The maximum rate of increase for a population is its......... potential.
*October 22, 2008*

**Chemistry (Orbital help needed)**

I just want to make sure I'm doing this right... (Numbers in brackets are the square roots or electrons) "How many orbitals are completely filled in an atom that has 12 electrons? The electron configuration is 1s[2]2s[2]2p[6]3s[2]?" It would be 2 right? I'm ...
*October 22, 2008*

**Project Management**

How does the design phase of the project management life cycle differ in content and importance from the other phases?
*October 21, 2008*

** government**

durrrr..
*October 19, 2008*

**math**

A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?
*October 17, 2008*

**math**

A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?
*October 17, 2008*

**math**

A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?
*October 17, 2008*

**Project Management**

List the personal and professional characteristics necessary to be an effective project manager. What characteristics are learnable?
*October 8, 2008*

**chemistry**

yes that solved everything thanks!
*October 4, 2008*

**chemistry**

Ibuprofen, the active ingredient in Advil, is made up of carbon, hydrogen, and oxygen atoms. When a sample of ibuprofen, weighing 5.000 g, burns in oxygen, 13.86g of CO2 and 3.926 g of water are obtained. What is the simplest formula of ibuprofen? I need to find out if I'm...
*October 4, 2008*

**ALGEBRA**

can you help me with this. d dont get it at all :( let n be the number used for the given number puzzle. use algebra to show how the puzzle works. 1. pick a number 2. subtract 9 3. multiply by 6 4. divide by 3 5. add 18 6. subtract twice your original number You will always ...
*September 24, 2008*

**Chemistry**

Imagine that you have a 6.00L gas tank and a 4.00L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145atm , to what pressure should you fill the...
*September 21, 2008*

**Physics**

Oh okay thank you very much.
*September 16, 2008*

**Physics**

Hey I'm not sure how to solve this problem: An 1840 kg car is moving to the right at a constant velocity of 2.94 m/s. What's the netforce? What's the netforce if the car would be moving to the left? I'm thinking that the net force going right and the net force ...
*September 16, 2008*

**accounting**

i HAVE A BALANCE SHEET FOR A COMPANY AND i WOULD LIKE FOR SOMEONE TO TELL ME IN LAYMAN TERMS WHAT IT SAYS
*September 12, 2008*

**computers**

Why do you think the requirements analysis process is so difficult?
*September 9, 2008*

**Critical Thinking**

I could not identify vague, ambiguous, or rhetorical devices in this article. Can you tell me if I am missing something? John Kerry is making the outsourcing of jobs by American companies a centerpiece of his campaign, telling audiences that ''because of George Bush&#...
*September 6, 2008*

**Biology**

The following chemicals have the indicated formula weight Surcose = 342.3g; Potassium dihydrogen=136.09; and Tris=121.14 Also the following solution already made: 20%SDS, 5M NaCl, 500mM EDTA. You have a 40% glycerol solution, and 10X TBE. List the step to make the following ...
*August 27, 2008*

**Physics**

Given the initial position of a particle is x(0)=2m at t(0)=0s. At t=2s, what are the particle's (a) position, (b) velocity and (c)acceleration?
*August 26, 2008*

**Grammer questions check**

Identify the locations or locations where apostrophe errors occur: (A) When the dog knocked over it's (B) bowl, the little girl claimed that the dog wasn't (C) her's
*August 13, 2008*

**calculus**

what is the integral of x^(2)arctan(6x) dx?
*May 22, 2008*

**math**

a ______________ is a mathematical rule.
*May 21, 2008*

**math**

what is a mathematical rule?
*May 21, 2008*

**novel**

1)B 2)C 3)C 4)D 5)D 6)C 7)B 8)B 9)C 10)B 11)A 12)C 13)A 14)B 15)D 16)C 17)A 18)D 19)A 20)D
*May 21, 2008*

**Chemistry -- to Dr.Bob**

whom should i link up with to meet the challenge of spending the next two hours blowing up rubber balloons by mouth besides old huff and puff luc,eh what?I`m woefully loneley for Mr.Adams.Thanks
*May 2, 2008*

**English**

Summarize Paris' request of Capulet, and Capulet's response?
*April 11, 2008*

**math**

which allows you to convert pounds and tons to ounces?
*April 7, 2008*

**creating surveys**

how to create a survey
*March 30, 2008*

**Accounting**

Identifying and journalizing Closing Entries Klein Photography
*March 5, 2008*

**non fiction**

An enjoyment of solitude
*March 3, 2008*

**Math (Geometry)**

I only describe one because that is the one I am having trouble with, the others were simple since it would show a figure composed of 5 triangles and only 2 would be shaded. (2/5)
*February 29, 2008*

**Math (Geometry)**

"Target Games: Darts are thrown at each of the boards shown below. A dart hits the board at a random point. Judging by appearances, find the probability that it will land in the shaded region." This figure is a diamond (the diamond is not shaded) and it has half a ...
*February 29, 2008*

**history**

which sides slave on during the Civil war? and why did they switch side?
*February 25, 2008*

**history**

why most American slaves dont have birth record?
*February 24, 2008*

**math**

Discuss the relationship between the graphs of the lines with equation y = mx +2, where m is any real number.
*February 22, 2008*

**Math (Geometry)**

Yeah it left me clueless too, oh well, I will just have to hope I get them right. XD
*February 21, 2008*

**Math (Geometry)**

See thats exactly what I thought, the 22% one was #1 but when I checked it in the back of the book it said it should be 25. Could the book be wrong? (It also says #3 should be 32)
*February 21, 2008*

**Math (Geometry)**

"The graph shows types of trash in a typical American city. Find the measure of each central angle to the nearest whole number." (I do not want all the answers, I just want to know HOW to get them so I will only post the first three problems that corresponds with the...
*February 21, 2008*

**Spelling**

Hello Can Anyone help me spell the word ( ACK-ROW-NIM ) For Instance DOB Is An ACK ROW NIM For Date Of Birth. THANK YOU in Advance Robert
*February 10, 2008*

**chemistry**

A saturated solution of ammonium sulfate, (NH4)2SO4, in water at 30 0C contains 78.0 g (NH4)2SO4 per 100.0 g H2O. What is the molality of this solution?
*February 5, 2008*

**Physics**

A 40.0kg child is in a swing that is attached to ropes 2.00m long. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions: a) When the ropes are horizontal b) When the ropes make a 30.0 ...
*February 5, 2008*

**history**

what is The trans-Atlantic slave trade and its most lasting consequence.
*February 5, 2008*

**math**

A figure is transformed into a new figure by being rotated 180 degrees, translated left 6 units, and dilated by a factor of 4. How are the old and new figures related? a)both congruent and similar b)congruent but not similar c)similar but not congruent d)neither similar and ...
*January 31, 2008*

**math**

Factor (15a squared bc squared -9a squared b to the fourth c) by finding the gcf. I think the answer is 3abc(5ac-3ab3). I got it because I found the gcf of the coefficents which are 3. I subtracted one from each exponent so, i canceled b from 15a squared bc squared and c from-...
*January 31, 2008*

**math**

A transversal intersects two parallel lines and forms eight angles. Which of the following statements is false? a)alternative interior angles are always congruent. b)corresponding angles are always congruent. c)adjacent interior angles are always supplementary d)exterior ...
*January 31, 2008*

**math**

line xy is translated 3 units to the left. if a point on line xy is located at (2,11), where would the equivalent point be on line X and Y prime? a)(2,14) b)(2,8) c)(-1,11) d)(5,11) I think the answer is c. What I did is move the point 3 units to the left and and subtracted 3 ...
*January 31, 2008*

**math**

so the answer is c?
*January 31, 2008*

**math**

Patrick has a summer job passing out flyers for a store. Each flyer weighs about 0.55 ounce. If he is given a bundle of flyers that weighs 16.5 lbs, how many flyers must he pass out? a)105 b)300 c)480 d)560 I think the answer is b. Is it right?
*January 31, 2008*

**math**

how many fluid ounces are there in 2 gallons of milk? a)256 b)128 c)64 d)8 I think the answer is a. Is it right?
*January 31, 2008*

**math**

line xy is translated 3 units to the left. if a point on line xy is located at (2,11), where would the equivalent point be on line X and Y prime? a)(2,14) b)(2,8) c)(-1,11) d)(5,11) I'm not sure but i think the answer is b or c. am i right?
*January 31, 2008*

**math**

A transversal intersects two parallel lines and forms eight angles. Which of the following statements is false? a)alternative interior angles are always congruent. b)corresponding angles are always congruent. c)adjacent interior angles are always supplementary d)exterior ...
*January 31, 2008*

**math**

factor (15a squared bc squared -9a squared b to the fourth c) by finding the gcf I think the answer is either 3abc(5ac - 3a cubed) or 3a squared bc(5c - 3b cubed) Am i on the right track?
*January 31, 2008*

**math**

is the answer d?
*January 31, 2008*

**math**

what is the gcf of 8x squared y, 12x to the fourth y to the fourth, and 20x cubed? a)8x squared y b)4x squared y c)8x squared d)4x squared I don't have an answer. The gcf is 4. I think the answer is either b and d. Which one is it?
*January 31, 2008*

**math**

A figure is transformed into a new figure by being rotated 180 degrees, translated left 6 units, and dilated by a factor of 4. How are the old and new figures related? a)both congruent and similar b)congruent but not similar c)similar but not congruent d)neither similar and ...
*January 31, 2008*

**math**

A crated full of sugar cubes has a volume of 3 cubic ft. The volume of each sugar cube is 0.5 cubic inch. How many cubes are in the crate? a)432 b)1728 c)5184 d)10368 I need help with this question.
*January 31, 2008*

**math**

Simplify the expression (x to the fourth power times x cubed)squared/x to the 4. a)x b)x to the fifth c)x to the tenth d)x to the 20 I kind of confused. I tried to divide by 4, but i couldn't get anything. I need help?
*January 31, 2008*

**math**

Which is equivalent to the expression (a squared + a to the fourth power) to the 0 power? a)0 b)1 c)a to the 6 power d)a to the eigth power I got answer a by adding 2 and 4 and multiplying it by 0. Is this right?
*January 31, 2008*

**math**

Boris gets paid an 8% commission on every car he sells. Last week, he made a commission of $1240. What was the price of the car he sold? a)15500 b)15000 c)12500 d)1550 I got answer a by dividing 1240 by .08. Is this right?
*January 31, 2008*

**math**

there is 51 students in the gym class and they are picking captains and there is one left and the teams have to be even so where does the last one go
*January 29, 2008*

**chemistry**

how to know clarify if the subtance is polar or nonpolar?
*January 27, 2008*

**Linguistics**

Hi I am looking for examples of voiceless/voiced words for the following places and manner of articulation: bilabial / nasal; alveolar/lateral; velar/stop plosive; velar/nasal; alveolar/stop plosive; post-alveolar/gliding; dental/friction; labiodental/friction; alveolar/nasal...
*January 24, 2008*

**math**

Solve this : (8x^3 ) - (168x^2) + ( 864x) = 1120 please >>>>>>>>>> I need it >>> please
*January 21, 2008*

**math**

finding the area of a submaine if it is 4.5m * 2.3m
*January 14, 2008*

**math**

How do you find the area of something?
*January 14, 2008*

**science I REALLY NEED HELP**

Say a submaine has an area of 4.5m X 2.3m and it is 304.8m below sea level. And that the density of the seawater is 113.4 kg/m2 what is the pressure exerted on the submaine by the water above it?
*January 14, 2008*

**math**

Are the possible values 5 and 6?
*December 27, 2007*

**math**

Susie designed an excersise program for herself. One part of the program requires her to walk between 25 to 30 miles each week. She plans to walk the same distance each day five days a week. What is the range of miles that she should walk each day? Write and solve a compound ...
*December 27, 2007*

**math**

Is h>-1?
*December 27, 2007*

**math**

1>2h+3>-1 1>2h+3 2h>2 h>1 2h+3>-1 2h>-4 h>-2 Is this right?
*December 27, 2007*

**math**

9250 </= x </= 10750 is the answer?
*December 27, 2007*

**math**

the crowd that heard the president speak was estimated to eb 10000 people. the acyual crowd could be 750 people more or less than this. What are the possible values for the actual crowd size? Write and solve a compund inequality that rpresent it and graph the solution. I think...
*December 27, 2007*

**math**

is the second queston right?
*December 26, 2007*

**math**

no one is answering.
*December 26, 2007*

**math**

Solve the compund inequality and graph the solution. -4<t+2<4 First I did t+2>-4 and I got t>-2 and I did t+2<4 and i got t<2. Then I graphed it and I dot an open dot on 2 and -2. Is this right? -1<1/2x<1 I did 1/2x>-1 and i got x>-2 and i did 1/...
*December 26, 2007*

**math**

is the second question right?
*December 26, 2007*

**math**

-6<9+3y<6 9+3y>-6 y>-5 9+3y<6 y<-1 On a number line, dot -1 and -5. Is this right? 3f>15 or 2f<-4 15>3f f>5 2f<-4 F<-2 Is this right?
*December 26, 2007*

**math**

Solve the compund inequality and graph the solution. -4<t+2<4 First I did t+2>-4 and I got t>-2 and I did t+2<4 and i got t<2. Then I graphed it and I dot an open dot on 2 and -2. Is this right? -1<1/2x<1 I did 1/2x>-1 and i got x>-2 and i did 1/...
*December 26, 2007*

**math**

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees This is my answer? Is this right?
*December 11, 2007*

**math**

I think that's the answer. Is this right?
*December 11, 2007*

**math**

I really need an answer!Why are no one answering?
*December 11, 2007*

**math**

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees? I really need an answer!!!!!!!
*December 11, 2007*

**math**

no one's answering.
*December 11, 2007*

**math**

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees?
*December 11, 2007*

**math**

so which one is the radical form?
*December 10, 2007*

**math**

for the first question, can the answer be 9 and 7?
*December 10, 2007*

**math**

so what is the radical form?
*December 10, 2007*

**math**

Solve each equation and leave the answer in simplest radical form. x squared+6x-9=0 n squared-2n+2=5 3y squared-4y-2=0 I never learned how to do this. Can you help me?
*December 10, 2007*

**math**

how do you simplify radical expressions?
*December 10, 2007*

**math**

no one is answering the question?
*December 10, 2007*

**math**

how do you simplify radical expressions?
*December 10, 2007*