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April 20, 2014

April 20, 2014

Post a New Question | Current Questions

**College Chemistry**

When Aluminium is added to KOH then solution is?
*Thursday, May 9, 2013 at 1:10pm*

**scholarship essay**

What makes me deserving of this scholarship is my dedication to succeed, my work ethic, and leadership skills. Throughout my years in school I have always been recognized as a person that loves to be the best. People all over the world have dreams that never come true. One ...
*Thursday, May 9, 2013 at 10:23am*

**Math**

2500 students take a college entrance exam. The scores on the exam have an approximate normal distribution with mean u = 52 points and a standard deviation o = 11 points. Estimate the percentage of students scoring 52 points or more. ^ How would you do this?
*Tuesday, May 7, 2013 at 11:25pm*

**College Chemistry 104**

A voltaic cell consists of a Pb/Pb2+ half-cell and a Cu/Cu2+ half-cell at 25 C. The initial concentrations of Pb+2 and Cu+2 are 0.0500 M and 1.50 M, respectively. A. What is the initial cell potential? B. What is the cell potential when the concentration of Cu+2 has fallen to ...
*Tuesday, May 7, 2013 at 11:50am*

**embryology**

...Actually I strongly recommend that you go to the nearest college, go to its bookstore, and find the used textbook area. Many times you will find great books for under 5 dollars.
*Monday, May 6, 2013 at 4:10pm*

**ENGLISH**

5. Which one of the following sentences contains an unnecessary colon? A. Here's the question on all of our minds: Will our team be able to defeat their arch rivals tonight? B. My store list included: milk, soup, chicken, and ice cream. C. She wants one thing: a new job. ...
*Monday, May 6, 2013 at 12:34pm*

**college physics**

a water skier is being pulled by a tow rope attached to a boat. as the driver pushes the throttle forward,the skier accelerates. a 70.3kg water skier has an initial speed of 6.10m\s. determine the work done by the net external force acting on the skier.
*Monday, May 6, 2013 at 11:21am*

**college algebra**

i need help with elimination and substitution linear equation
*Sunday, May 5, 2013 at 11:04pm*

**Math- Statistics **

Suppose 60% of adults have a college degree. If I take a random sample of 80 adults, what is the probability at least 50% of them have a college degree?
*Sunday, May 5, 2013 at 10:57pm*

**College Chemistry**

I assume you are looking to predict the solution of the salt. yes Bob
*Sunday, May 5, 2013 at 12:07pm*

**College Chemistry**

Yes
*Sunday, May 5, 2013 at 12:01pm*

**college Chemistry**

oxygen nitrogen carbon dioxide
*Sunday, May 5, 2013 at 11:56am*

**college Chemistry**

What would you expect to be the chemical names of the main gases that were dissolved in the tap water?
*Sunday, May 5, 2013 at 11:54am*

**college Chemistry**

if conductivity increases, brightness increases.
*Sunday, May 5, 2013 at 11:43am*

**college Chemistry**

Conductivity test, what controls the brightness of the light? (hint: think about your tapwater abd NaCl results and why they were different)
*Sunday, May 5, 2013 at 11:37am*

**College Chemistry**

I assume you are looking to predict the solution of the salt. Very few ionic crystals are good conductors unless dissolved.
*Sunday, May 5, 2013 at 11:07am*

**College Chemistry**

What is its dissociation constant?
*Sunday, May 5, 2013 at 11:01am*

**College Chemistry**

What must we know a given ionic salt to be able to predict whether is is a good or poor conductor, w/o testing its conductivity?
*Sunday, May 5, 2013 at 10:32am*

**college agebra**

(3x^2 - 2x - 1)(x^2 + x + 5) = 3x^4 + 3x^3 + 15x^2 + -2x^3 - 2x^2 ..... etc (you should have 9 terms in this line) can you see what I am doing? it is just an expanded version of the old FOIL concept I am sure you can finish it There will be all kinds of like terms, make sure ...
*Friday, May 3, 2013 at 10:20pm*

**college agebra**

(3xsquared-2x-1)(xsquared+x+5)
*Friday, May 3, 2013 at 9:08pm*

**college algebra**

Solve: x^3-9x^2+20x-20<0 write answer in the interval form.
*Friday, May 3, 2013 at 6:49pm*

**Statistics**

1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could make 6 deliveries per hour with a standard...
*Friday, May 3, 2013 at 11:45am*

**statistics**

A sample survey interviews an SRS of 263 college women. Suppose (as is roughly true) that 75% of all college women have been on a diet within the past 12 months. Using the Normal approximation, what is the probability (±0.001) that 82% or more of the women in the sample...
*Thursday, May 2, 2013 at 10:48pm*

**Statistics**

Assuming that the heights of college women are normally distributed with mean 66 inches and standard deviation 2 inches, what percentage of women are shorter than 72 inches?
*Thursday, May 2, 2013 at 5:39pm*

**college chemistry**

what is the correct answer for this?
*Thursday, May 2, 2013 at 1:27am*

**college algebra**

I can't log into your photobucket, (needs password) so I will "guess" at a diagram expanding and simplifying your equation I got y = (-1/625)x^ + 400 b) at the centre, x = 0 so y = 400 the bridge is 400 ft high width of bridge, let y = 0 (on the x-axis) 0 = (-1/...
*Wednesday, May 1, 2013 at 9:26pm*

**college algebra**

I have been stuck on this problem for over a week and I don't even know how to start the problem. Parabola equation y= 4(100 - x^2/2500) x and y are measured in feet A. Find the length of the road across the bridge B. find the height of the parabolic arch at the center of ...
*Wednesday, May 1, 2013 at 9:07pm*

**Lincoln College Of New En**

It has been found that 85.6% of all enrolled college and university students in tge united states are undergrates. A random sample of 500 enrolled college students in a paticular state revealed that 420 of them were undergrates. Is there sufficient evidence.to conclude that ...
*Wednesday, May 1, 2013 at 2:53pm*

**math**

Assume you do not know the population standard deviation. describe how you form a 90% confidence interval to estimate the population mean age for students at Westwood College Online.
*Wednesday, May 1, 2013 at 10:01am*

**College chemistry**

You're making this much harder than it is. Don't be intimidated by chemistry. The difference is 7.4-6.4 = 1.0, right? To convert pH to H3O^+, use pH = -log(H3O^+) 7.4 = -log(H3O^+) and 6.4 = -log(H3O^+). Solve each for H3O^+ and subtract these two numbers to find how ...
*Tuesday, April 30, 2013 at 4:05pm*

**College chemistry**

The pH of blood is 7.4 and that of saliva is 6.4. what is the difference in pH between these two solutions? How much more Hydronium ion (H3O+) is in the saliva than in the blood. I need a detailed answer with the formulas if you can. I have a hard time with chemestry
*Tuesday, April 30, 2013 at 3:38pm*

**College Physics**

1.4 m/s
*Tuesday, April 30, 2013 at 12:35pm*

**Math**

A national study reports that 20% of college freshman have GPA above 3.5. We wish to determine if the corresponding proportion is higher at a local university. To conduct the test we select a random sample of 100 freshmen and determine that 26 of them have GPA above 3.5. Run ...
*Tuesday, April 30, 2013 at 11:39am*

**College Algebra and Number Theory**

SETS Let S1, ... , Sn be sets satisfying the following condition: Sj ¡ö Sj+1 for all 1 ¡Â i ¡Â n - 1. Find S1 ¡û S2 ¡û¡¦ ¡ûSn and S1 ¡ú S2 ¡ú ¡¦ ¡&...
*Sunday, April 28, 2013 at 7:51pm*

**Engineering **

A physics major is working to pay his college tuition by performing in a traveling carnival. He rides a motorcycle inside a hollow transparent plastic sphere. After gaining sufficient speed, he travels in a vertical circle with a radius of 13.4 . The physics major has a mass ...
*Sunday, April 28, 2013 at 11:16am*

**College Physics**

A uniform meter stick of mass M has an empty paint can of mass m hanging from one end. The meter stick and the can balance at a point 19.9 cm from the end of the stick where the can is attached. When the balanced stick-can system is suspended from a scale, the reading on the ...
*Saturday, April 27, 2013 at 10:55pm*

**Physics**

just keep thinking you can figure it out it is a college course so i cant help you.
*Saturday, April 27, 2013 at 9:53pm*

**Physics**

just keep thinking you can figure it out it is a college course so i cant help you.
*Saturday, April 27, 2013 at 9:52pm*

**randhills college life orientation**

I need help its been a week but why cant u help me?
*Saturday, April 27, 2013 at 7:11am*

**english**

Questions about Avi(the author) Why was school a constant struggle for him? Avi kept writing because of the encouragement of his family and the help of whom? After college, what job did Avi take? where? When did Avi become interested in children's literature?
*Friday, April 26, 2013 at 8:25pm*

**Lincoln College Of New En**

If you really want an expert to help you, be sure to follow directions and type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.
*Friday, April 26, 2013 at 6:07pm*

**college pathology 2**

igk
*Friday, April 26, 2013 at 2:47pm*

**Lincoln College Of New En**

A survey by Men’s Health magazine stated that 14% of men said they used exercise to reduce stress. Use a = 0.10. a random sample of 100 men was selected and 10 said that they used exercise to relieve stress. Use the P –value method to test the claim. Could the ...
*Friday, April 26, 2013 at 2:05pm*

**Lincoln College Of New En**

it has been found that 85.6% of all enrolled college and university students in the U.S. are undergraduates. A random sample of 500 enrolled college students in a particular state revealed that 420 of them were undergraduates. Is there sufficient evidence to conclude that the ...
*Friday, April 26, 2013 at 1:43pm*

**Lincoln College Of New En**

The percentage of physicians who are women is 27.9% in a survey of physicians employed by a large university health system, 45 of 120 randomly selected physicians were women. Is there sufficient evidence at the 0.05 level of significance to conclude that the proportion of ...
*Friday, April 26, 2013 at 1:29pm*

**Lincoln College Of New En**

the Old Farmer’s Almanac stated that the average consumption of water per person per day was 123 gallons. To test the hypothesis that this figure may no longer be true, a researcher randomly selected 16 people and found that they used on average 119 gallons per day and s...
*Friday, April 26, 2013 at 1:22pm*

**Lincoln College Of New En**

the average 1-ounce chocolate chip cookie contains 110 calories. A random sample of 15 different brands of 1-ounce chocolate chip cookies results in the following calorie amounts, at the a = 0.01 level, is there sufficient evidence that the average calories contents is greater...
*Friday, April 26, 2013 at 1:15pm*

**college Mathematics**

Thank you Steve
*Friday, April 26, 2013 at 11:46am*

**college Mathematics**

no, you are correct.
*Friday, April 26, 2013 at 11:45am*

**college Mathematics**

I am having problems with permutations what is 5P2 The answer I have is 20 am I wrong?
*Friday, April 26, 2013 at 11:44am*

**College math**

C(50,6) = 15,890,700
*Friday, April 26, 2013 at 10:41am*

**College math**

Please HELP! In a certain lottery game players choose a set of 6 distinct numbers from the numbers 1-50. How many combinations are possible if order is not important. Thanks sooooo much!
*Friday, April 26, 2013 at 8:53am*

**College Physics**

A speck of charged dust with a mass of 39mu g. is kept levitating by putting it in an electric field. If you must apply a field of 10 N/C to keep it suspended in mid-air, what is the charge on the speck of dust? Can someone please help soon? I got this wrong on my last test ...
*Thursday, April 25, 2013 at 9:55pm*

**English**

Now that we have gathered a vast amount of ____ it is up to us to draw some useful conclusions from all this information data 6.After the war, all the property that has been ____ by the government was turned back to its former owners confiscate 7.Little did I realize when I ...
*Thursday, April 25, 2013 at 6:02pm*

**College Physics**

The rectangular coils in a 201-turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.81 T? I'm not sure what equations to use.
*Thursday, April 25, 2013 at 4:39pm*

**college chemistry**

fk
*Thursday, April 25, 2013 at 4:09pm*

**College math**

Three coins are tossed. How many ways are there to get more than 2 tails, exactly 2 heads, only 1 tail. Thanks in advance for the help!
*Thursday, April 25, 2013 at 12:34pm*

**pharmacy informatics**

Yes, it looks as if you'd have to buy that one if you want to read it. Another suggestion I have is to go to your local or college library and search on their big databases. In the college where I taught, once a student or teacher had a library card, he/she could access ...
*Thursday, April 25, 2013 at 10:02am*

**college physics**

Power = 7.0hp * 746W/hp = 5222 Watts = 5222 Joules/s. Mass = 475Lbs * 0.454kg/Lb = 215.65 kg.= Mass of boiler. d = 38Ft./3.3Ft/m = 11.52 m. Work=F*d = mg * d=215.65*9.8 *11.52= 24,346 Joules. t = 24346J * 1s/5222J = 4.66 s.
*Wednesday, April 24, 2013 at 8:40pm*

**statistics**

0.57 of all college students like the idea of a new curriculum. If we select 88 students (ASSUME INDEPENDENCE), what is the Standard Deviation of (the Probability Distribution that would list the number of students (from 0 to 88) and the probability of each.) THE STANDARD ...
*Wednesday, April 24, 2013 at 8:37pm*

**college algebra**

logx + log 2x = 4 log (x(2x)) = 4 , using the rule log AB = logA + logB log (2x^2) = 4 so 2x^2 = 10^4 2x^2 = 10000 x^2= 5000 x = ± √ 5000 but x > 0 for log x to be defined so x = √5000
*Wednesday, April 24, 2013 at 6:09pm*

**college algebra**

Solve the logarithmic equation. Log x +log2x = 4 Wouldn't this be no solution because log x is undefined?
*Wednesday, April 24, 2013 at 3:49pm*

**statistics**

Suppose that the test scores for a college entrance exam are normally distributed with a mean of 450 and a standard deviation of 100. If a student is selected at random what is the probability that the student will score above 600?
*Wednesday, April 24, 2013 at 11:36am*

**College algebra**

4x (5x-3)
*Wednesday, April 24, 2013 at 9:34am*

**College algebra**

20x^2+12x
*Wednesday, April 24, 2013 at 9:02am*

**Statistics**

Based on information from Harper's Index, 37 out of a random sample of 100 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of 100 Americans who did attend college, 41 claim that they believe in extraterrestrials. At ...
*Tuesday, April 23, 2013 at 5:23pm*

**Statistics**

Assuming that the heights of college women are normally distributed with mean 62 inches and standard deviation 3.5 inches, what percentage of women are between 58.5 inches and 72.5 inches? a. 13.6% b. 84.0% c. 97.6% d. 34.1% e. 15.7%
*Tuesday, April 23, 2013 at 3:26pm*

**Business Math **

A Competitive Coup in the In-Flight Magazine. When the manager for market intelligence of AutoCorp, a major automotive manufacturer, boarded the plane in Chicago, her mind was on shrinking market share and late product announcements. As she settled back to enjoy the remains of...
*Tuesday, April 23, 2013 at 9:56am*

**PLEASE HELP! college algebra**

the magnitude of dot and products of two vectors are 6 ander root 3 and 6 respectivly9.find the angle between the vectors.
*Tuesday, April 23, 2013 at 7:41am*

**College algebra**

e^(x+5) = e^-6 x+5 = -6 x = -11
*Tuesday, April 23, 2013 at 4:31am*

**College algebra**

Solve equation by expressing each side as a power of the same base & then equating exponents. e^x+5=1/e^6
*Tuesday, April 23, 2013 at 3:24am*

**Chemistry 110, college**

mols ethylene glycol = grms/molar mass = ?. Solve for mols. m ethylene glycol = mols/kg solvent Solve for m and substitute into the two equations below. dT = Kf*m and dT = Kb*m
*Monday, April 22, 2013 at 10:04pm*

**College Chem**

Looks more like Boyle's law to me. P1V1 = P2V2
*Monday, April 22, 2013 at 9:56pm*

**Basic college Math**

5
*Monday, April 22, 2013 at 5:35pm*

**College Chem**

charles law: 7.89 l sample of gas had pressure of 850 torr. what volume will it occupy if the pressure is changed to 457 torr? (torr is a measurement of pressure. 760 torr = 1 atmosphere
*Monday, April 22, 2013 at 4:55pm*

**College: Diversity Education**

The question clearly asks about "cultural influences" -- which of the answers addresses these?
*Monday, April 22, 2013 at 2:47pm*

**College: Diversity Education**

Still didn't actually help me with the question.
*Monday, April 22, 2013 at 2:35pm*

**College: Diversity Education**

http://www.jiskha.com/display.cgi?id=1366653276
*Monday, April 22, 2013 at 2:31pm*

**College: Diversity Education**

A term referring to perspectives on children’s development that emphasize the importance of cultural influences is A) cultural constructivism. B) ethnoconstructivism. C) social constructivism. D) anthropological constructivism. I believe the answer is C, but wanted a ...
*Monday, April 22, 2013 at 2:24pm*

**Chemistry 110, college**

A solution is prepared by dissolving 56.5g of ethylene glycol in 874 g of water. Calculate the change in the boiling point and the freezing point.
*Monday, April 22, 2013 at 2:05pm*

**english**

(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces and ...
*Monday, April 22, 2013 at 1:30pm*

**college physics**

how long would it take a 4.50kW MOTOR TO RAISE A 175KG BOILER TO A PLATFORM 15.0M ABOVE THE FLOOR?
*Monday, April 22, 2013 at 8:19am*

**college physics**

How many seconds would it take a 7.00hp motor to raise a 475 lb boiler to a platform 38.0 ft high?
*Monday, April 22, 2013 at 8:18am*

**college**

Ooooops! x^2 + (x + 6)^2 = 27^2 Don't know where I got x+ 2. Sorry.
*Sunday, April 21, 2013 at 9:47pm*

**college**

let x = distance from pole to spot on ground where guy wire is attached x + 6 = height of pole x^2 + ( x+ 2 )^2 = 27^2 simplify and solve for x
*Sunday, April 21, 2013 at 9:18pm*

**college**

a guy wire 27 feet long runs from the top of the pole to a spot on the ground. I f the height of the pole is 6 feet longer than the from the base of the pole to the spot where the guy wire is anchored, how tall is the pole?
*Sunday, April 21, 2013 at 9:13pm*

**College Chem 1010**

NH4OH
*Sunday, April 21, 2013 at 4:14pm*

**College Algebra**

1324413345
*Sunday, April 21, 2013 at 10:24am*

**College Algebra**

1324413345
*Sunday, April 21, 2013 at 10:23am*

**College Physics**

A uniform ladder of mass, m, and length, l, leans at an angle, theta, against a frictionless wall. Determine a formula for the minimum angle at which the ladder will not slip.
*Saturday, April 20, 2013 at 12:03am*

**College Physics**

A large 61.0 kg board is propped at a 45 degree angle against the edge of a barn door 2.9m wide. How great a horizontal force must a person behind the door exert (at the edge) in order to open it? Assume that there is negligible friction between the door and the board but that...
*Saturday, April 20, 2013 at 12:02am*

**College Physics**

A cubic crate of side s=2.0m is top-heavy: its CG is 18cm above its true center. Part A) How steep an incline can the crate rest on without tipping over? Part B) What would your answer be if the crate were to slide at constant speed down the plane without tipping over? (The ...
*Saturday, April 20, 2013 at 12:01am*

**PLEASE HELP! college algebra**

Given the following piecewise function f(x)= {-x+1 for x < 0 {-1 for 0 ≤ x ≤ 3 {-2x for x > 3 a) Find the domain b) Find the range c) Find the intercepts d) Is f continuous on its domain? If not, state where f is discontinuous. e) Graph the function
*Friday, April 19, 2013 at 8:42pm*

**college algebra**

what's the problem? The roots give the factors: 1. (1)(x+1)(x-2)(x-5) 2. (-1)(x+4)(x-3)(x-3)(x-4)
*Friday, April 19, 2013 at 2:46pm*

**college algebra**

1.write the formula for the function that has degree 3 and zeros of -1,2 and 5 with a lead coefficient of 1? (leave answer in factored form) f(x)= 2. Write the formula for the function that has degree of 4 and zeros of -4, 3(multiplicity 2) and 4 with a lead coefficient of -1...
*Friday, April 19, 2013 at 2:24pm*

**Chemistry College**

How much KHP is in samples 2 and 3? %KHP = (mL x M x mmolar mass/mass sample) You know mL NaOH, M NaOH, millimolar mass KHP is 0.20422; solve for %KHP. Then substitute %KHP and new mass of samples 2 and 3 and solve for mL NaOH.
*Thursday, April 18, 2013 at 2:25pm*

**Chemistry College**

If KHP sample 1 requires 22.47 mL of aqueous NaOH, how many milliliters of NaOH should be needed for samples 2 and 3?
*Thursday, April 18, 2013 at 3:59am*

**College Chemistry**

When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air at this temp?
*Thursday, April 18, 2013 at 2:16am*

**College Chemistry**

When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air at this temp?
*Thursday, April 18, 2013 at 2:16am*

**College Chemistry**

When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air at this temp?
*Thursday, April 18, 2013 at 2:16am*

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