Wednesday

August 5, 2015

August 5, 2015

Total # Posts: 1,987

**Chemistry - Kc question**

What would happen to Kc values in an experiment if the Beer's law constance (k) value used was low ( e.g you used 4000/M when the actual constant had a value of 5000/M)? Explain your answer Absorbance = k*length cell*concentration Cell length is constant. You read an ...
*August 5, 2007*

**Physics -- Electromagnetic**

A 7.4 Ù square loop, whose dimensions are 4:5 m x 4:5 m, is placed in a uniform 0.093 T magnetic field that is directed perpendicular to the plane of the loop The loop, which is hinged at each vertex, until the separation between points C and D is d = 2:5 m. The ...
*August 5, 2007*

**Physical Geography**

1-if a person's line of vision is at the top of Building 121 feet high, how far out to sea could a person see with a good telescope? 2- the light in a lighthouse is 144 feet above sea level. How far does the light extend before it dips below sea level? 3- if an observer is...
*June 11, 2007*

**science**

Please help this is worth a big grade and is due tomorrow stoichiometry calculation- Na weighs .53g water is 91.92 ml Patm= 30.03 in Hg Gas Law Calculation same info as above Balanced Chem. equation same info as above Unit conversion setup and calculation same info as above
*May 30, 2007*

**biology 12**

is there chromosome replication in mitosis? i know theres one in meiosis, im just not sure for mitosis. Yes See: http://www.uic.edu/classes/bios/bios100/lecturesf04am/lect16.htm and scroll down to: Mitosis in a Nutshell
*May 27, 2007*

**Biology**

I need to illustrate a cell starting out with 3 chromosomes each, it replicating, and in the end, having 4 cells. (Meiosis). Could someone explain it to me, please? easy go on internet/google, type in meiosis search for pic, theyshow you the steps
*May 17, 2007*

**Biology**

Can girls get pregeant if they have sex before they start their period? I'm not at all asking from a sex-ed point of view, i'm asking from a biological point of view. I mean, when girls menstrate, their chromosomes repliciate when replacing the eggs, right? And to get ...
*May 17, 2007*

**Biology**

Larry is brought up on paternity suit charges as the father of baby Pat. Baby Pat has type O blood, and her mother has type B blood. if Larry has type A blood, can he be Pat's father? (Hint: think about the possible genotypes that can produce types A, B, and O blood and ...
*May 14, 2007*

**Biology**

Joe has freckles but Sue does not. Both have attached earlobes. Some of their children do not have freckles. Freckles and earlobes are inherited independently. What is Joe's genotype? What is Sue's genotype? What is the chance that their next child will have both ...
*May 13, 2007*

**Biology**

Kim who is heterozygus for polydactyl (6 fingers and toes) marries Tony who is homozygous normal (5 fingers and toes). What is Kim's genotype? What is Tony's genotype? What is the chance of having children with 6 fingers? Please include the Punnett Square. let FT be ...
*May 13, 2007*

**physics**

I have to build a mini solar car for a school project and i have three solar cells that i bought. whenever i hook up the solar cells i get a reading between 1.5-1.8 volts, but when i hook it up to the motor it wont start it. According to the box the motor only requires 1.5v ...
*May 6, 2007*

**Business, Linear Programming**

This post may be a little lengthy, so please bare with me if you can help. The problem is: A cruise liner has 4 classes of accommodations. Following are the # of reservations made, # of reservations available, and cost per room for each class: Super Deluxe, 100, 160, $3000 ...
*April 15, 2007*

**English**

I am doing research paper about stocks and manipulations, but I could not found resources for my researches... That talks about how the media affect the stocks to go up and down ……. Thanks very much You are searching for information that is so specific that you have ...
*April 12, 2007*

**finance**

Junior debt is debt that has been more recently issued, and in bankruptcy it is paid off after senior debt because the senior debt was issued first
*April 11, 2007*

**English**

I am looking for article talk about bird flu? also if you can tell me about the companies that tell that people who afraid from the bird flu to buy their product( what i mean by that how they manipulating their products) Here's a collection of articles about bird flu: http...
*April 11, 2007*

**help math**

Find the equivalent measure. 45 feet=___________yards show work Isn't there three feet in a yard. So multlply by 1yard/3feet. so its 3
*March 27, 2007*

**math**

If a rule is (3x,y) and a scale factor of 4 is used to transform it , what will the new rule be??? Show work 12x, 4y?
*March 27, 2007*

**Chemistry**

Jiskha, you're a friggen retard that knows nothing about anything. Wow your one dumb kid. If you have a question, please post it and give us your thoughts on your approach. If not.....
*March 25, 2007*

**Bus law**

In 1991 the Tailhook Association (mostly male military aviators) hosted their annual convention at the Las Vegas Hilton Hotel, despite the fact that they had known that during previous Tailhook conventions rowdy men in the hotel hallways had accosted young women. There was an ...
*March 24, 2007*

**English**

A-Polygamy should be legalized. B-The voting age should be lowered to sixteen. C-The prison system should give greater emphasis to the punishment of in mates than to their rehabilitation. D-Doctors and clinics should be required to notify parents of minors when they prescribe ...
*March 24, 2007*

**Geog**

2- at sea level the air temperature is 80 degree F. this air reaches the dewpoint at 6,000’. The air continues to rise, pushed up by trade winds, over a mountain that is 12,000’ high. If the dry adiabatic rate is 5.5 degree F/ 1000’ and the wet adiabatic rate is...
*March 22, 2007*

**Geog**

if the temperature at sea level is 70 degree F , according to the normal of average lapse rate of 3.6 degree F/1000', the temperature at 10,000' would be what? show work plz Please note that we don't do students' homework for them. Once YOU have come up with a ...
*March 22, 2007*

**global studies**

because canada is such a long way from the equator,much of the country has a climate that is? http://www.google.com/search?q=canada+climate&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA I live in southern Ontario, the province where about 40% ...
*March 19, 2007*

**pre-algebra**

which measurement is the largest. 14mm or 1cm 1cm is 10 mm. It is time you learned this. how do you do this??? you know??
*March 15, 2007*

**Business law? torts**

I am looking for newspaper article describing any torts? Or I will happy if u do that for me, if u do so what is the article What is the “ issue”? Does it meet all of the requirements in your opinion, based on the facts you have? How should the court rule? What court...
*March 14, 2007*

**Physics (thx drwls, bobpursley)**

After reaching terminal velocity, a raindrop of m=3.06E-4kg falls vertically down a distance of 500m. a)what is the work done by the force of gravity on the raindrop? sol) since the displacement is in the same direction as the force, the work done is Fcos90 = 0. (correct?) b) ...
*March 13, 2007*

**physics**

A force of 8 N acts on a 2 kg object as it is displaced along the x-axis. The speed of the object when it is at x= 2m is 5 m/s. a) what is the net work done by F(x) on the object as it is displaced from x=2m to x=8m? sol) 8m - 2m = 6m; 6m * 8N = 48 J b) What is the object'...
*March 13, 2007*

** Geography and weather**

I am looking for websites …. About Geography that shows the weather in most cities in California... For example: City of Stockton, Los Anglos but it most shows: - Temperature. - Pressure - Relative Humidity - Due point Temperature - Air pressure - What temperature of ...
*March 13, 2007*

**Physics: Work**

1st question: I was solving a question and I was asked the work done by friction. It is natural that work done by friction (a retarding force)should be negative and in my answer it was. However, just to be sure, work can be negative? 2nd question: A block of m = 2.00kg is ...
*March 12, 2007*

**Calculus-Limits**

Okay, i posted this question yesterday, however, I did not really understand the answer I received. If your the one who answered my question, could you please elaborate. If not, could you try to answer this tough, for me, question. Thanks a lot. lim x-->0 Square root (1 + ...
*March 6, 2007*

**Math-Limits**

sqrt(1+tan x)-sqrt(1+sin x) lim all divided by x^3 x-->0 Use that Sqrt[1+x] = 1+ 1/2 x + 1/2 (-1/2)/2 x^2 + 1/2(-1/2)(-3/2)/6 x^3 + O(x^4) You can thus write the numerator as: 1/2 [tan(x) - sin(x)] - 1/8 [tan^2(x) - sin^2(x)] + 1/16 [tan^3(x) - sin^3(x)] + O(x^4) Note that...
*March 5, 2007*

**Math-Limits**

sqrt(1+tan x)-sqrt(1+sin x) lim all divided by x^3 x-->0
*March 5, 2007*

**5th grade science**

What volume of helium would be in a baloon the size of a soft drink? The same volume that the soft drink occupies.
*March 5, 2007*

**math**

Got it...thanks for the help
*February 27, 2007*

**math**

Fifteen percent of the seniors voted for Joe. If 289 seniors voted for tehother candidates, how many seniors voted in the election? Let the total number voting be N. 0.85 N = 289 Solve for N
*February 27, 2007*

**Physics**

The system of blocks of masses m1=3kg and m2 = 1.80 kg are connected by a string as shown. Mass m rests on a rough surface of unknown coefficient of kinetic friction. After the masses are released, they move with an acceleration of 2.80 m/s^2 (m1 moves to the right, m2 moves ...
*February 20, 2007*

**Statistics**

An important part of the customer service responsibilities of a natural gas utility company concerns the speed with which calls relating to no heat in a house can be serviced. Suppose that one service variable of importance refers to whether or not the repair person reaches ...
*February 10, 2007*

**Statistics**

A specially equipped trauma emergency room at a hospital has been in operation for 40 weeks and has been used a total of 240 times. Assuming the weekly pattern of demand for this facility is Poission, compute the following: 1) The probability that the room is not used in a ...
*February 10, 2007*

**Statistics**

A sign on the gas pump of a certain chain of gasoline stations encourages customers to have their oil checked, claiming that one out of every four cars should have its oil topped up. What is the probability that exactly 3 of the next 10 cars entering a station should have ...
*February 10, 2007*

**Math**

Is 22.4 bigger than 2.24?
*February 7, 2007*

**Geog**

Why does each time zone extend 7 1/2 degrees on each side of central meridian rather than extending from 0 degrees to 15 degree? Why do you think it is?
*February 2, 2007*

**more physics**

in the equation P= 2m/ ne^2 t what do these symbols mean? p - resistor m - mass of e- n - ?? e - electron charge>?? t - time between collisions??
*February 2, 2007*

**Physics URGENT**

5uC charges are at the base vertices of an equilateral triangle 0.4m on a side. What is the electric field at the third vertice? im not completely sure how to start that.. don't i need the force to calculate the x&y components? NO. Figure E directly from a charge. ...
*February 2, 2007*

**Vague Physics**

Does anyone know what the laws of conservation are when dealing with resistors? Well, I guess you can vaguely state if you have, for example, 2 resistors in series: then, in accordance with the law of conservation of energy, the voltage drop across each resistor (the energy ...
*February 1, 2007*

**Physics**

Three positive particles of equal charge +11.o micro C, are located at the corners of an equilateral triangle of sides 15.0cm. Calculate magnitude and direction of the net force on each particle. See answer below at your original post thanks Dan.. i dont think thats how we ...
*February 1, 2007*

**trig/physics**

Three positive particles of equal charge +11.o micro C, are located at the corners of an equilateral triangle of sides 15.0cm. Calculate magnitude and direction of the net force on each particle. DUUUUUUUUUH! THIS IS SO EASY! LOOK IN YOUR BOK, IDIOTIC DUDE! R U A BOY AND HOT, ...
*February 1, 2007*

**Geography**

If you left New Orleans ( 30 degrees N, 90 degrees W) at 4:00 am on Friday Dec. 31, and traveled for 12 hours before arriving in Baku, Azerbaijan ( 40 degrees N, 30 degrees E) , at what time and on what day would you arrive in Baku? ( show work pleas) Thank you for using the ...
*January 30, 2007*

**Geography**

A traveler leaves Lima, Peru ( approximately 12 degrees S. Lat. And 90 degrees W. long.) at 8:00 am on Tues. Oct. 3rd and travels for 14 hrs before arriving in Sydney, Australia ( approx. 34 degrees S and 150 degree E). what time and what day would the traveler arrive ...
*January 30, 2007*

**Trigonometry**

the voltage E in volts in a circuit after t seconds (t70) is given by E=12 sin(120pi times t). After how many seconds does the voltage first reach 6 volts?
*January 18, 2007*

**Trigonometry**

evaluate sin^-1(negative square route of 3over2) in radians.
*January 18, 2007*

**trig**

give exact value of cos 75 degrees. give exact value sin 15 degrees. give exact value sin 225 degrees. You will have to use the addition relations here. Notice 75 is 30 +45, 15 is 45-30, and 225 is 180 + 45. I will be happy to critique your work.
*January 18, 2007*

**trig**

convert 80 degrees into radians 80 deg *2PI rad/360 deg = ?
*January 18, 2007*

**Trigonometry**

Evaluate sin^-1(square route of 2over2) give the answer in radians. Please i really need this question. can you help me?
*January 17, 2007*

**math**

3x-4=-2(3x+5) 3x-4=-2(3x+5) clear the fraction. 3x-4=-6x-10 add+6x+4 to both sides. 3x-4+6x+4=-6x-10+6x+4 9x=+4-10 Can you take it from here? 3x-4=-6x-10 9x=-6 x=-2/3
*January 16, 2007*

**help**

HELP ME!!! with what? sorry! what is a chemical symbol? thanks webelements heres a link to a chemistry/science site. thanks a bunch! :] Can you help me find the answers for these question? Explain why: 1.flammable substances like petrol should not be placed near naked flames
*January 15, 2007*

**Physics help!!!!!!**

a. Pguage=pgh=1.025E3(9.8)(35)=351575n/m2 b. Pabsolute=Po+Pguage=452575 c. gives you density and volume so convert to kg as the mass. T=mg=1587.6 N d. Increase F=ma, so when it is accelerating there is a greater force pushing down on it
*January 14, 2007*

**probability**

Kevin has 11 CDs in his glove compartment. Six are rock and 5 are rap. He selects 3 cds at random. What is the probability that he picks at least 2 rap cds? Pr (two)=5/11 * 4/10 * 6/9 Pr (three ) =5/11 * 4/10 * 3/9 add those. Not quite bobpursley. There are 3 ways to pick 2 ...
*December 12, 2006*

**probability**

wooden balls are numbered 1-75. Five balls are drawn at random. What is the probability of drawing 5 consecutive numbers if no replacement occurs.? The first ball has a 1/75 chance of being selected. The second ball can be from either above or below the first, so it has a 2/74...
*December 11, 2006*

**maths**

I have y=5sin(4x-pie/2). I need too find phase shift. I know c/b is shift. This is pie2/4=.392, but does not equal my answer and I don't know direction it should go. Can anyone help? What do you mean by c/b? What do you mean by pie2/4=.392? What phase shift are you trying ...
*December 9, 2006*

**Pigskin Geography**

idk idk idk idk idk
*December 9, 2006*

**Pigskin Geography**

determine the river that were dammed to form these lakes?
*December 9, 2006*

**Microeconomics**

The demand for a luxury good whose purchase would exhaust a big portion of one's income is
*December 8, 2006*

**Science**

Why are the lanthanides and actinides moved out of numerical order and placed at the bottom of the periodic table? They aren't always, but for most periodic tables, the width would be very long, and it wouldn't fit very well on an eight by eleven piece of paper. Look ...
*December 7, 2006*

**Chemistry question**

Why does something acid based disolve something carbon based? What makes you think this is a solubility rule? I can think of hundreds of exceptions. Carbon disulfide in aqueous solutions of acids, carbon tetrachloride in HCl, etc.
*November 14, 2006*

**Calculus**

Great! I understand now that C0=f(a) c1=f'(a) c2=f"(a)/2 Now, If I am to find the parabolization of the equation x^2-x at x=2, then c0=x^2-x=2^2-2=2 c1=2x-1=2(2)-1=3 c2=2/2=1 So, the equation (taken from c0+c1(x-a)+c2(x-a)^2) is >> 2+3(x-2)+1(x-2)^2?? Is this ...
*November 13, 2006*

**SCIENCE**

HOW IS A GRAPH SIMILAR TO A DATA TABLE both summarize data living things?
*November 5, 2006*

**acids and alkalis**

Chesterfield 3-1 Mansfield. COME ON U SPIREITES!!
*November 4, 2006*

**Ideas**

I need some fundraising ideas for this trip I am going on. I need to raise from about $200-$5000. Got any ideas? Yeah, I have some ideas for you. One of my ideas is that you could wash cars, inside of course though. You could also put containers in some stores or something and...
*November 2, 2006*

**science**

why is it difficult to convert miles to yards or feet Not like the metric system where it is in powers of 10. It was based on strange things like: http://www.iofm.net/community/kidscorner/maths/origin.htm
*November 1, 2006*

**science**

what connections can you identify between the metric units for length and volume? Go to: http://members.aol.com/profchm/metric.html Scroll down to: Measurement of Fluid Volumes
*November 1, 2006*

**Calculus**

Hi, been tearing my hair out over this question. I think I'm on the right track, but just not sure how to finish it. Anyway, here it is: A particle is moving along the ellipse 4x^2 + 16y^2 = 64. At any time 'T' its x- and y-coordinates are given by x = 4cosT, and y...
*October 16, 2006*

**engineering HELP**

you've bought a new truck and want to show off your ag engineering skills by painting the bore, stroke, piston displacement, clearance volume, and compression ratio for the engine on the hood. All you know about the truck is that has a 4 cyl 250 cubic in engine. An ...
*October 12, 2006*

**Engineering**

You find out you need a pallet of 14 bags of seed that weigh 50 lbs each. You know the pallet itslef weighs 44lbs. The CO-OP forklift takes 30 seconds to move the pallet and bags of seed the 60 feet to the back of your truck. A) How much power does the forklift produce to move...
*October 12, 2006*

**history**

>_> I have that question too and I've never heard of Ms. Foster
*October 8, 2006*

**Engines**

How do i find total displacement in in^3/min if i have the bore and stroke and and rpm and number of cylinder. i can calculate piston and engine displacement and compression ratios but just not sure about TOTAL displacement and the rpms?
*September 26, 2006*

**scienct**

what are some benefits and risks associated with using bacteria to clean up oil spills? Since this is not my area of expertise, I searched Google under the key words "bacteria 'oil spills'" to get these possible sources: http://www.tierramerica.net/2003/1215/...
*September 25, 2006*

**SCIENCE**

DESCRIBE CYTOPLASMIC STREAMING IN PARAMECIUM. WHAT IS THE BENEFIT OF CYTOPLASMIC STREAMING? http://www.daviddarling.info/encyclopedia/C/cytoplasmic_streaming.html In the ameba it allows movement, but in the paramecium it distributes nutrients and other key metabolic processess...
*September 25, 2006*

**SCIENCE**

DESCRIBE THE METHOD pARAMECIUM USES TO ACQUIRE NUTRIENTS SUCH AS YEAST http://ebiomedia.com/gall/classics/Paramecium/paramecium2.html
*September 25, 2006*

**Engineering**

You are given a hydraulic jack which you'd like to keep in your car in case you have a flat. Your vehicle weighs 4500lbs, and you know the jack will have to lift 1500 lbs when you put it under the axle. The hand end cylinder of the jack is 1/2inch in diameter and the "...
*September 25, 2006*

**Engineering**

Can anyone tell me the formula and what the symbols mean for the following problems? 1. You have a 1/2 inch internal diameter hose at your home and water moves through it at 2.5 feet/sec when the faucet is fully turned on. If you leave the water running while you wash your car...
*September 24, 2006*

**Engineering**

Your Swine manure pit is rectangular measuring 50' by 100' and is 4' deep. If you use a 1" diameter hose 2 hours each day at 8 ft per second velocity to remove the manure from your swine pins how many days worth of storage space do you have in your pit? In ...
*September 10, 2006*

**Engineering**

The balance tank in our milk processing plant in our building holds about 10 gallons of milk. The inlet pipe is 1.5 inches in diameter abd the outlet is 3/4 inches diameter. If milk flows into the tank at .5 ft/sec how fast must it depart to keep from overflowing? Use the mass...
*September 10, 2006*

**Engineering**

You want to water your garden with rainwater, and you place a 55 gal drum at the bottom of the downspout of your house gutter system to collect the water. The drum is 42" tall and you cut a 1 inch diameter hole at the lowest point of the side of the drum to install your ...
*September 10, 2006*

**Engineering**

Determine the minimimum depth of a water reservoir that will provide a flow rate of 1200 gpm in a 4 inch diameter horizontal pipe that opens to the atmosphere You ought to consider Bernoulli's equation for this, it is in your text. You can model it as this: A drop of water...
*September 10, 2006*

**Engineering**

Your green house irrigation sytem is plumbed with 3/4" pvc pipe from which 1/2" branch lines are routed to each row of plants. if the city supplies water that flows at 3ft/sec what is the velocity of the water at plants level? WEhat is the flow rate in gallons per ...
*September 10, 2006*

**Bank Operations Question**

Say you want to start a "National Bank". Thus you will need a piece of paper that is like a license to start a bank. What is that paper called? And what is the name of the government agency that you would get that paper from? If you are in a beginning course, the ...
*August 12, 2005*

**Economics Review Help!**

This is for a test that I'm studying for in Economics. I never did understand this stuff. Here's what I have to figure out. I've never been good at Economics, but I'm trying to get this stuff down for my final. Any help would be appreciated. Thanks in advance. ...
*July 12, 2005*