Tuesday
September 23, 2014

Posts by Colby


Total # Posts: 86

statistics
If you are told the mean grade in ECON 2023 is 80 with a standard deviation of 5, what is the probability that if you randomly selected 36 students you would find an average grade of 82 or more? I found the Z-score: 82-80/5 Which gave me .6554 then 1-.6554=.3446 So 34% would ...
July 6, 2014

Chem
Radioactive 24Na with a half-life of 14.8 hours is injected into an animal in a tracer experiment. How many hours will it take for the radioactivity to fall to 12.5% of its original intensity? I am confused on what number to start with
August 27, 2013

Chemistry
A Rolaids tablet contains calcium carbonate to neutralize stomach acid. One Rolaids tablet requires 44.55 mL of 0.448 M hydrochloric acid to convert its calcium carbonate into calcium chloride, carbon dioxide and water. How many grams of calcium carbonate are there in one ...
August 5, 2013

Chemistry
Window cleaner contains ammonium hydroxide. A 10.00 mL sample of window cleaner is titrated with 38.5 mL of 0.311 M hydrochloric acid. what is the molarity of the ammonium hydroxide in the window cleaner?
August 5, 2013

Chemistry
The tin (II) fluoride in a 10.000 g sample of toothpaste is extracted into solution and them a precipitate of lanthanum (II) fluoride (LaF3) is formed by the addition of a lanthanum (III) nitrate solution. If the mass of the lanthanum (III) fluoride precipitate is 0.105g, what...
July 29, 2013

Chemistry
If a 0.875 gnsample of barium chloride is dissolved in water and then treated with a sodium sulfate solution, how many grams of barium sulfate precipitate should be collected?
July 29, 2013

Chemistry
a cube of metal has a mass of 1.45 kg. when the metal is placed into a graduated cylinder containing 356mL of water, the volume increases to 898 mL. calculate the density of the metal in g/mL
July 2, 2013

English
this is all we were given: To what extent are identities flexible and unstable, and to what extent are identities fixed and permanent? To what extent are individuals in control of their own identity, and to what extent is their identity controlled by external cultural forces?
April 14, 2013

English
I have to write an Prospectus and Annotated Bibliography essay. But I don't know how to do that, can anyone explain what to do for me?
April 14, 2013

Physics
High-speed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed of the golf ball ...
March 5, 2013

Physics
An 67.6 kg object moving to the right at 38.7 cm/s overtakes and collides elastically with a second 48.9 kg object moving in the same direction at 19.2 cm/s. Find the velocity of the second object after the collision. Answer in units of cm/s
February 26, 2013

Physics
A 3 m long lever is used to lift a mass of 500 kg. If a force of 200 N is to be used to life the mass, then how far from the mass should the fulcrum be placed? Assume the mass and the force act at the ends of the lever.
December 11, 2012

Physics
A 3 m long lever is used to lift a mass of 500 kg. If a force of 200 N is to be used to life the mass, then how far from the mass should the fulcrum be placed? Assume the mass and the force act at the ends of the lever.
December 11, 2012

physics
An Alaskan rescue plane traveling 36 m/s drops a package of emergency rations from a height of 162 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s^2 Where does the package strike the ground relative to the point directly below where it was released? ...
November 26, 2012

Physics
A plane drops a hamper of medical supplies from a height of 2960m during a practice run over the ocean. The planes horizontal velocity was 108m/s at the instant the hamper was dropped. What is the magnitude of the overall velocity at the hamper at the instant it strikes the ...
November 19, 2012

Physics
A cat chases a mouse across a 1.1 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 2.2 m from the edge of the table. The acceleration of gravity is 9.81m/s^2. What was the cat’s speed when it slid off ...
November 19, 2012

College Algebra
Solve each equation. If an equation has no solution, so indicate. (no complex #) a - 1 = _ 3a + 2 a+2 a2 + 4a + 4 reads: a over a+2 minus 1 equals -3a+2 over a2 (a squared) + 4a + 4
September 16, 2012

physics
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.47 km. They start at the west side of the lake and head due south to begin with. (a) What is the distance they travel? (b) What is the magnitude of the couple’s ...
September 6, 2012

physics
A hot-air balloon is rising upward with a constant speed of 2.22 m/s. When the balloon is 7.74 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?
September 6, 2012

physics
A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 45.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 3.00 m/s^2. Including the reaction time, how long ...
September 6, 2012

5th grade math
Which is more 0.33 or 0.333?
September 4, 2012

algebra
samuel is 5/8 inch taller than jackie. shelley is o.7 inch taller than jackie. craig is inch taller than jackie. who is taller?
February 10, 2012

chemistry
a sample of hydrogen occupies a volume of 950 mL at -15.3 degrees celcius. if the temperature increased to 30.0 degrees celcius, what would be the new volume?
December 8, 2011

Chemistry
a sample of carbon dioxide has a volume of 25.0L at 5.80 x 10^2 mmHg. what pressure would be needed to increase the volume to 55.5 L? assume constant temperature
December 8, 2011

chemistry
If a 0.10 M solution of silver fluoride, AgF, is mixed with a 0.10 M solution of barium acetate, Ba(C2H3O2)2, a pecipitate (ppt.) forms: AgF + Ba(C2H3O2)2--> ppt. In order to identify the precipitating ions, you conduct some experimental tests. a) what is the purpose of ...
December 2, 2011

chemistry
assume you had a solution that contained a mixture of a silver ions and stronium ions. come up with three different reaction plans that would allow you to precipitat either the silver ion or strontium ion, but the other ion would remain in solution
December 1, 2011

Chemistry
nevermind, figured it out!
November 17, 2011

Chemistry
predict whether nitrate salt solutions containing metal ions with the following outer shell electron configurations will be colored or colorless: [Ar] 3d2 and [Kr] 4d10
November 17, 2011

math
what is 3x+2y=6
November 16, 2011

Business Law Society
Would the result in the 99 Cents Only Stores V. Lancaster Redevelopment be any different today after the Supreme Court’s 2005 decision in the new London, Connecticut, case
November 10, 2011

Chemistry
Will the aqueous solution of titanium(II) chloride and beryllium chloride be colored or colorless?
November 7, 2011

Law
"A person who has both rights and duties" is a concept that defines the most basic concept of the law. In U.S. law, a person is defined as having all of the rights specified in the first 10 amendments to the U.S. Constitution (the Bill of Rights), plus many rights ...
November 4, 2011

English
Subject: Get Ready! We are hoping to be back at work soon, with everything running smoothly, same production schedule and no late projects or missed deadlines. So you need to clean out your desk, put your stuff in boxes, and clean off the walls. You can put the items you had ...
November 2, 2011

English227
oh okay, when say written sending a email would be the best form of correspondence.
October 30, 2011

English227
You are an upper-level manager in a large metropolitan hotel. One of your assistant managers, Jeff Clarke, has left you a voicemail message requesting emergency leave for the upcoming holiday weekend. Here's what the message stated; I'm calling to request emergency ...
October 30, 2011

Enlisgh
You are an upper-level manager in a large metropolitan hotel. One of your assistant managers, Jeff Clarke, has left you a voicemail message requesting emergency leave for the upcoming holiday weekend. Here's what the message stated; I'm calling to request emergency ...
October 30, 2011

Business Law
Assume that federal health investigators are pursuing a report that one of your manufacturing plants has a higher-than-average incidence of cancer among its employees, strecthing back for the files. But if the company turns them over, it might be accused of violating the ...
October 30, 2011

English
Yes it would create more jobs and strengthin the economy, I feel that would be better than engaging with a country when it violates democracy, its the same thing as your enagaing in it, in my opinion. So I feel that American companies should refuse to do business in countries ...
October 29, 2011

English
exactly I feel as if its not right and they shouldn't. but they do and does happen. So if American compaines didn't then we would have nothing. Everything is imported now from overseas
October 29, 2011

English
Should Americans compaines refuse to do business in countries that do not pratice democracy?
October 29, 2011

Law
okay. thanks
October 27, 2011

Law
you are absoulty right? thanks. But does moral exist when your younger when you don't know what's what?
October 27, 2011

Law
after studying the situation of Joe Nacchio, Mohandas Ghandi and Timothy McVeigh they all differ. I feel as though some indiviuduals can be identifed as exceptions. becuase of what tiggers them mentally.
October 27, 2011

Law
Does the moral judgement of some individuals worsen with age and education? Psychologist Lawarence Kohlberg clamis that moral judgement tends to improve with age and education. He identifies moral improvement as "progrssive internalization and generalization by an ...
October 27, 2011

chemistry
Thank you! I wasn't sure where H^+ was on the activity series
October 20, 2011

chemistry
Hydrogen, H2(g), is above silver metal in the activity series of the metals. WIll the follwing reaction, Ag(s) + H+(aq) -> occur or not occur? why or why not?
October 20, 2011

algebra
26.8 over .01, I don't know what to do with this it is set up so it looks like a fraction, could this mean divide 26.8 by .01?
October 20, 2011

algebra
26.8 over .01 it says to evaluate each expression
October 20, 2011

Math
Find the volume of steel required to make the beam B=108cm2 Length is 80cm
October 11, 2011

algebra
i think i meant to put n+(-5)=-7/12
August 23, 2011

algebra
n+(-5)=n n=-7/12
August 23, 2011

algebra
thank you.
August 23, 2011

algebra
oops typo i mean -2.3+3.5=?
August 23, 2011

algebra
-2.3+3.5+?
August 23, 2011

Chemistry
37 grams of Ca(OH)2 in 500 ml of solution is
July 14, 2011

Chemistry
1 NHzSO4 is what molarity
July 14, 2011

Chemistry
is it 3*10.23square
July 14, 2011

Chemistry
When NaCl dissolves in water it breaks up in sodium ions (Na+)and chloride ions(cl).500 ml of a 1M solution of NaCl contains how many (NA+) ions
July 14, 2011

math
Solve the system of equations x + y = 5 x - y = -9
May 16, 2011

math
Solve the system of equations x + y = 5 x - y = -9
May 15, 2011

math
3. Solve the system of equations x + 3y = 32 -3x + 2y = 3
May 15, 2011

math
Take a look at the following table: x -2 -1 0 1 2 f(x) -5 -2 1 4 7 a. Write out an equation for f(x). Assume the function is linear b. What is the slope? Is it negative or positive? What information do we get from the slope?
May 15, 2011

math
A reservation clerk worked 12.6 hours one day. She spent twice as much time entering new reservations as she did verifying old ones and one and a half as much time calling to confirm reservations as verifying old ones. How much time did she spend entering new reservations?
May 15, 2011

Math
Suppose you have a cookie stand, and when you charge $3 per cookie box you sell 200 boxes. But when you raise your price to $4 you only sell 120 boxes. a. Write an equation for the number of boxes you sell as a function of the price you charge. b. Denote "B" for ...
May 15, 2011

Math
Suppose you have a cookie stand, and when you charge $3 per cookie box you sell 200 boxes. But when you raise your price to $4 you only sell 120 boxes.
May 15, 2011

English
You're correct
December 1, 2010

chemistry
what is the punctuation of molar mass
October 28, 2010

Math
n= -15 n+(-7)-n=
September 7, 2010

chemistry
Final temp of a block of iron if 0.87g of water condenses on a 85.0g block of iron that is initially at 20 degrees Celsius.
September 7, 2010

grade 9 algerbra
6=2/5(n-1) any help would be appreciated.
June 20, 2010

math grade 9
6=2/5 (n-1)
June 20, 2010

grade 9 math
X+6 ~ 5 = -2
June 20, 2010

History
Why did Theodore Roosevelt mediate the russo-japanese war?
February 15, 2010

AP Chemistry
I got 147,000 torr but I 'm not positive that is correct
November 19, 2009

U.S. History
I am doing a project based on the Northeast of the 1830s and it requires that I have graphs or statistics to argue that my section is important to the country. I am having a hard time finding any useful material. Help would be very much appreciated!
November 10, 2009

U.S. History
What were the results of the european wars in the 1790s?
October 8, 2009

science
the answer is uniform>
March 24, 2009

Math
At the end of five days, Joseph had saved $30. If each day he saved $2 more than the day before, how much money did Joseph save each day?
January 26, 2009

social studies
Need help with project. what are essential ideans that are included ina POLICY of imperialism relating to renaissance europe
December 2, 2008

people
wHAT were the results oF CHriSTopHer CoLoMBuS eXpLorATioNS AND How MANY YeArS DiD He eXpLore
October 21, 2008

Modern World History
How did Louis XIV respond as he faced execution? Death of the Sun King The final years of Louis XIV's reign were marred by his persecution of Protestants and bitter losses in war. His personal life was also marked by tragedy. Between 1701 and 1712 his brother, son, ...
December 18, 2006

Chemistry
Arrange the following intermolecular attractions in order of increasing strengtgh: Dipole interactions, dispersion forces, and hydrogen bonds. http://www.science.uwaterloo.ca/~cchieh/cact/c123/intermol.html dispersion forces, hyrdogen bonds then dipole interactions? is this ...
December 15, 2006

The Art of Cinematography
what technical advancement in movie making prevented the cinematographer from moving the camera around?
December 10, 2006

History (essay) help
My Essay Assningment Changes to the government in France were inevitable. The purpose of this essay is to show why changes were needed. - think about the problems facing France from Louis XIV to Louis XVI along with the success of the Enlightment and American Revolution. Can ...
December 10, 2006

T.V Production
What is meant by Shooting "New York" Style? maybe it means shooting it fasted paced style or big time feature style. Just a thought:)
December 8, 2006

World/News
What is opium cultivation? I could be wrong, but I think it's the preparation of the soil for growing opium.
December 7, 2006

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