Sunday

November 23, 2014

November 23, 2014

Total # Posts: 1,871

**Chemistry**

Could anyone give a web about 1.Practical arts 2.Greek theory 3.Alchemy 4.Plogiston 5.Modern Chemistry Thanks:-) Duplicate post.
*July 10, 2007*

**Chemistry**

Could anyone give a web about 1.Practical arts 2.Greek theory 3.Alchemy 4.Plogiston 5.Modern Chemisry Thanks:-) These are such broad subjects. My suggestion: Go to www.google.com and type in what you want to find. You will find, literally, thousands of links. The more specific...
*July 10, 2007*

**math**

what is the sum of all consecutive numbers from 101 to 200, those two numbers inclusive? Halfway between, is 150. Then add 149+151,thence 148+152, and so on till 101+199. Each instance you have 300. So it seems to me... Sum= 200 + 150 + 300*N, where N is the number of pairs ...
*July 7, 2007*

**Trigonometry**

Find the angular speed in radians per sec. of the second hand on a clock. My answer is 1 rpm =1*2pi radians/1minute(1 rotation = 2pi radians) =2pi radians/60seconds =1/30 radians/seconds It goes 2PI radians in 60 seconds. What happened to the PI? I forgot to put sorry. So the ...
*July 4, 2007*

**Trigonometry**

A car with wheel of radius 14 inches is moving in a speed of 55 mph.Find the angular speed of the wheel in radian per sec. your car is moving at 55 mph, which is 55*5280*12 inches/3600 seconds or 968 inches/second. each rotation of the wheel covers 2*14*pi inches. so the ...
*July 3, 2007*

**Trigonometry**

A wheel is rotating at 200 revolutions per minute .find the angular speed in radians per second. 200 rpm =200*2pi radians/1 minute (1 rotation = 2pi radians) = 400pi radians/60 seconds =20/3 radians/second You can follow the same procedure for the other two questions you asked.
*July 3, 2007*

**Trigonometry**

Find the angular speed in radians per sec. of the second hand on a clock. How long does it take for the second hand to make one rotation? And isn't one rotation 2pi radians? Let me know what you got as an answer.
*July 3, 2007*

**chem.**

I'm asking of six guidelines in determining significant figure,because it was my assignment... Thanks again...:-) http://dbhs.wvusd.k12.ca.us/webdocs/SigFigs/SigFigs.html There aren't six rules here but these three will do it.
*June 27, 2007*

**Chem.**

what is the six guidelines in determining significant figures? Thanks:-) With a decimal: from the decimal go to the right side of it until you see a definite number other than zero. Start there and how many numbers there are, including zero after that number are sig figs. ...
*June 27, 2007*

**Comp.**

Could anyone help me Please.. about the uses of the computer on the following fields. 1.Business 2.Arts and Films 3.Music 4.Engineering 5.Manufacturing 6.Police and Laws Enforces 7.Medicine 8.Education 9.Science and Research 10.Archeology Thanks :-) http://en.wikipedia.org/...
*June 24, 2007*

**english**

what themes do old man the sea and macbeth have in commmon? tragedy? You can look each one up at www.sparknotes.com/lit and read the "themes, symbols ... " section in each and see what you find. Let us know if you have questions once you have looked up and read these...
*June 19, 2007*

**physics**

find the average of a block being propelled propelled by an elastic band. very sorry to disturb Mr bobpurlsey again. i am very thankful to you replies. the only problem that lies in the answer is that i haven't been taught hooke's law in Grade 11. which indicates 1/2kx...
*June 13, 2007*

**physics ( disregard last post)**

hey bob, this question average force of friction thanks a lot. i only don't get one part. Now, set the potential energy of the rubber band (stretched x cm) equal to the work done on friction. does it matter how much i stretch it and what does it mean when "You can ...
*June 12, 2007*

**Physics (Bob please read)**

hey bob, this question average force of friction thanks a lot. i only don't get one part. Now, set the potential energy of the rubber band (stretched x cm) equal to the work done on friction why is this equal to work done by friction? how come we can't use velocity, ...
*June 12, 2007*

**physics**

find the average of a block being propelled propelled by an elastic band. We know it is uniform acceleration. my attempt on this problem Measure the force applied of elastic band with a newton scale. The more you strecth the farther the distance the block will travel after ...
*June 12, 2007*

**about Engineering**

I'm taking Electronics and Communication Engineering...Can you help me pls...this is my problem=First day of school the teacher ask why did you choose this course? thanks;-) Maybe you chose it because of a natural curiosity and mathematical and analytical skills you may ...
*June 5, 2007*

**English**

anyone can help me about writing basic sentence pattern.And what is some tips. These sites may help you. http://wwwnew.towson.edu/ows/SentPatt.htm http://owl.english.purdue.edu/handouts/grammar/g_sentp.html
*May 22, 2007*

**Algebra**

2(3x - 7) + 4 (3 x + 2) = 6 (5 x + 9 ) + 3 how will solve it? well you first multiply it out: 6x-14+12x+8=30x+54+3 you combine like terms 18x-6=30x+57 -12x=63 x=-63/12
*May 22, 2007*

**MATH**

I am having lots of trouble with SIMPLFYIGN RADICAL EXPRESSIONS can anyone help>? Please http://www.google.com/search?as_q=&hl=en&num=10&btnG=Google+Search&as_epq=SIMPLIFYING+RADICAL+EXPRESSIONS&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=title...
*May 20, 2007*

**Math**

The base of a solid S is the simicircular region enclosed by the graph of y = the sqrt of [4-x^2] and the x-axis. If the cross sections of S perpendicular to the x-axis are squares, the the volume of S is...? I've worked this out a few ways using what I know abt finding ...
*May 7, 2007*

**math**

Write an equation for the translation of circle x^2+y^2=25, 2 units right and 4 units down. We will be happy to critique your work. We are not inclined to do it for you. what is a bird 2-2
*May 7, 2007*

**math**

Write an equation of a circle with the center (-5,-4) and radius 6. The general equation for a circle is (x-a)^2 + (y-b)^2 = r^2, where r is the radius of the circle and (a,b) are the (x,y) coordinates of the center. Make the appropriate substitutions and you will have the ...
*May 7, 2007*

**math**

Write an equation of a circle with the center(-5-8) and radius 2. We will be happy to critique your work. We are not inclined to do it for you.
*May 7, 2007*

**I am lost**

Simplify this expression x ^2 - 64 / x + 8 _______ ______ x ^2 -25 / x - 5 Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's not a tutor with this ...
*May 6, 2007*

**chem**

I posted a question earlier that I was having trouble with, but I was unable to attempt to try it again for several days after posting. The question was: A buffer is made up of .300 L each of .500 M KH2PO4 and .317 M K2HPO4. Assuming tha the volumes are additive, calculate a) ...
*May 5, 2007*

**Chemistry**

A buffer is made up of .300 L each of .500 M KH2PO4 and .317 M K2HPO4. Assuming tha the volumes are additive, calculate a) the pH of the buffer b) the pH of the bugger after the addition of .0500 mol of HCl to .600 L of the buffer. c) the pH of the buffer after the addition of...
*May 1, 2007*

**Math**

2t is more
*April 24, 2007*

**nuclear chem**

which of the following choices correctly describes the decreasing ability of the radiation to penetrate a sheet of lead that is 3 inches thick? A. alpha particles > beta particles > gamm rays B. gamma rays > alpha particles > beta particles C. alpha particles > ...
*April 21, 2007*

**English**

What could be the theme of this poem? What I would like to know is the subject matter and also what could be the author's commentary on the poem. Sonnet - Silence by: Edgar Allen Poe There are some qualities- some incorporate things, That have a double life, which thus is ...
*April 20, 2007*

**Algebra**

How do you solve the following problem? 3(4+4x)= 12x+2 It has no solution. X can be any value, and it wont equal.
*April 10, 2007*

**Calculus**

I really need help with this problem an automobile accelerates from rest at 1 + 3(square root)t mph/sec for 9 seconds. How far does it travel in those nine seconds? I have found that the velocity, after nine seconds, is 63 I have figuredout the answer but i dont know how to do...
*April 1, 2007*

**English**

Hi, I'm having trouble understanding this sentence... "It comes upon one with new force in the pauses of the night that the Chaldeans were a desert-bred people." I don't know understandy why the last part of the sentence starts with "that" is in ...
*March 20, 2007*

**Chemistry**

If I am titrating KMnO4 against a sample of Fe2+, but there is also I- in the sample which of the iron and iodine will be oxidised first? Unless something is present in the sample to complex the iodide ion, KMnO4 may titrate both. How are you titatrating it? What are you using...
*March 10, 2007*

**reading**

what does third person limited mean? Third person limited describes a book in which the narrator tells the story in the third person. He knows only his own feelings and thoughts, but describes the actions and words of other characters. For more information, check this site. ...
*March 4, 2007*

**Chemistry**

What colour and formula are the iron 2+ & iron 3+ chloride complexes? http://en.wikipedia.org/wiki/Iron(III)_chloride
*March 4, 2007*

**Thomas**

What colour and formula are the iron 2+ & iron 3+ chloride complexes? The subject is science not Thomas!! It helps teachers to see the real subject area so they don't waste time reading items outside their realm. =)
*March 3, 2007*

**Math**

If the measures of the angles in a triangle are in the ration 3:4:5, the measure of the exterior angle of the triangle can not be a) 120D b)165D c)105D d)135D b 165 With the triangle ratio of 3:4:5 the equation can be made: 3x + 4x + 5x = 180 x = 15 The angels of the triangle ...
*February 23, 2007*

**math (conversion)**

convert mM to uM The capital M should be written as a lower case m. There are 1,000 um in 1 mm.
*February 6, 2007*

**math (conversion)**

how do you conver ug/ml to ug/ul? There are 1,000 uL in 1 mL. So 1500 ug/mL = 1.500 ug/uL or in detail-- 1500 ug/mL x 1 mL/1,000 uL = 1.500 ug/uL. Thank you Dr. Bob222
*February 6, 2007*

**windows 2003 server**

Install a faster network adapter
*February 1, 2007*

**windows 2003 server**

The file in the Catalogs folder will be backed up, and the archive bit will be changed from 1 to 0.
*February 1, 2007*

**math**

how do you calculate theoretical yield of something? I don't know where to find the formula You go to the balanced chemical equation, and look at the mole ratio between the reactants and products. The theoretical yield is the value calculated from stoichiometry of a ...
*January 31, 2007*

**physics**

A bullet is fired from a rifle that is held 1.06 m above the ground in a horizontal position. The initial speed of the bullet is 1340 m/s. Find (a) the time it takes for the bullet to strike the ground and (b) the horizontal distance traveled by the bullet. I am not really ...
*January 29, 2007*

**physics**

The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's competition, the end...
*January 29, 2007*

**physics, physics, physics!!!!!**

At a depth of 10.9 km, the Challlenger deep in the Marianas Trench of the Pacific Ocean is the deepest site in any ocean. In 1960, Donald Walsh and Jacques Piccard reached the challenger deep in the bathy scaph trieste. Assuming that sea water has a uniform density of 1024km/m...
*January 28, 2007*

**Math**

Is it possible to differentiate (60-x)/1.2? I'm thinking the answer would be 1/0 which is not possible but I just want to make sure. No problem. Just do a little algebra first. f(x)= (60-x)/1.2 = 50 - (5/6) x The derivative is df/dx = -5/6 How did you get 5/6x?
*January 12, 2007*

**Geography**

what are the answers for 3,11 and 14
*January 2, 2007*

**Finance**

im trying to calculate cost of debt. where did they get the 50 value from? P0 = $1,080 = $50(PVIFA,R%,46) + $1,000(PVIF,R%,46) 30 year bond, 10% semi annual. 7 years ago it was issued. current selling is 108% face value.
*December 14, 2006*

**Finance**

Please answer following: 1. The purpose of secondary trading is to provide liquidity and competition between investments. provide a market for securities not handled in primary trading. provide jobs for brokers and dealers. provide lower commissions than on the organized ...
*December 11, 2006*

**Pre-Cal**

Recursive Sequences: find a formula for: 1,1,2,3,5,8,13,21 It looks like the Fibonacci sequence. Take the first two numbers and add them to get the 3rd. take the 2nd and third to get the fourth...etc. yeah, but how would i write that into a formula?
*December 6, 2006*

**Math (Geometry)**

Hello everybody, I have been presented with a geometry task. Here is the exact description of the task. "You work for a construction company. One of the clients wants the company to build a 16 food by 20 dance floor. They want the floor to be a moaic pattern made up of ...
*December 3, 2006*

**Fact Familys**

What are the 2 fact families for 6,3. 6 3 + 3 and 4 + 2 Now what do you think the families are for 3? ??
*November 30, 2006*

**Math**

When the quotient of two numbers is the same as the first factor, what do you know about the second factor? That the second factor will be different? idk... i forgot about that one
*November 29, 2006*

**Chemistry**

How much a 2.00 g 239 Pu would have decayed after 1.6 x 10^4 years? The half-life for 239 Pu is 2.4 x 10^4 years. amount remaining= originalamount*(.5)^(1.6/2.4) amount decayed = original - amountremaining
*November 26, 2006*

**philosophy**

Kant thought that the fundamental moral value is
*November 26, 2006*

**Math (matrices)**

No one answered my matrix question. Let me rephrase: Let A, B, and 0 be 2x2 matrices. Assuming that A is invertible and 0 is all zeroes, what is the inverse of the matrix [A|0] [B|A] (that is a 4x4 matrix represented as 4 2x2 matrices) The answer is in the form: [A^-1|0 ] [C |...
*November 16, 2006*

**Math**

Let A, B, and 0 be 2x2 matrices. Assuming that A is invertible, find a matrix C such that [A^-1|0 ] [C |A^-1] is the inverse of the partitioned matrix [A|0] [B|A]
*November 16, 2006*

**science again last question**

Can a chemical characteristic for the element Neon be that it is toxic to the air? thanks agian and thats the last question!! thank you!!! I'd say not. Try the chemical or physical properties listed here: http://environmentalchemistry.com/yogi/periodic/Ne.html#Chemical I ...
*November 15, 2006*

**science. Please help!**

please help!! What is at least one chemical characteristic on the element Neon? Thank you! From James P.S- thanks again!!!! http://environmentalchemistry.com/yogi/periodic/Ne.html Thanksssss
*November 15, 2006*

**Microeconomics**

"In both monopoly and perfect competition the profit maximising output is at the level at which MR = MC, but only in the latter is the optimum output level such that P = MC" Explain the above statement by comparing the model of perfect competition with that of ...
*October 29, 2006*

**Microeconomics :o)**

"In both monopoly and perfect competition the profit maximising output is at the level at which MR = MC, but only in the latter is the optimum output level such that P = MC" Explain the above statement by comparing the model of perfect competition with that of ...
*October 29, 2006*

**MATH**

How do I Find The Domain, Vertical Asymptote, and X- intercept of this logarithmic function: f(x)=6+log base 6 (x-3) HEEEEELLLLPPPP!!!!!!!! What do you need help on?
*October 28, 2006*

**[Data Management] - Probability**

I need help with a probability quesition that has been presented in my grade 12 class. I'm really not sure how to go about solving it. "What is the probability of being dealth exactly 3 of a kind in your 5-card poker hand?" Thanks for any help. the probability is...
*October 16, 2006*

**math**

6=7x+x 4=2/3X+9-1/3X Not sure about the question, but it could be to solve for x, like this: 6=8x , then x=6/8 or x=3/4 4-9=(2/3)X - (1/3)X try to finish it...if you need more help, post it again
*October 5, 2006*

**Math - Data Management**

It is a grade 12 course, and our current unit is Combitionations. There is on questions where there is a 4 x 4 cubic diagram, like the 1x1 squares on graphing paper but 4x4. The question is to explain how the formula 5C2 x 5C2 gives the answer to how many rectangles (or simply...
*October 1, 2006*

**Physics**

A dock worker applies a constant horizontal force of 79.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 11.0 m in the first 6.00 s. What is the mass of the block of ice? *I notice two very common ...
*October 1, 2006*

**Lattice method/math**

94*73=
*September 19, 2006*

**Econ**

Analysis: Suppose a new law stated that individuals could print their own currency. Consider this and answer the following: - What kind of changes would come about in daily commercial transactions as a result of such a law? - What forms could this private money assume? - What ...
*August 5, 2006*

**ETH/125**

Hello I am also an Axia College student. I took that IAT test. I am still looking for different measurements of prjudice.
*July 20, 2006*

**sociology**

Sarah, you are a hipocrite for even clicking on this site's link! So far nobody that I have read has cheated. Giving help as to where to look for an answer is not cheating. Obviously you did not know where to look either and that is why you are here and even read this far ...
*July 20, 2006*

**Accounting**

Working capital Management Indicate how each of the following six different transactions Dynamic mattress might make would would affect I) cash and II)Networking capital A) Paying out a $2 million cash dividend B) A customer paying a $ 2500 bill resulting from a previous sale...
*June 26, 2006*

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