Monday
July 28, 2014

Posts by Colby


Total # Posts: 87

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 m...

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

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 Rola...

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?

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...

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?

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

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?

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?

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 imme...

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

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.

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.

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? ...

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 su...

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 t...

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

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 displac...

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?

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 ...

5th grade math
Which is more 0.33 or 0.333?

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?

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?

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

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 thi...

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

Chemistry
nevermind, figured it out!

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

math
what is 3x+2y=6

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

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

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 th...

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 u...

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

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 lea...

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 lea...

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 priva...

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 ...

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

English
Should Americans compaines refuse to do business in countries that do not pratice democracy?

Law
okay. thanks

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

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.

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 individ...

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

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?

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?

algebra
26.8 over .01 it says to evaluate each expression

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

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

algebra
n+(-5)=n n=-7/12

algebra
thank you.

algebra
oops typo i mean -2.3+3.5=?

algebra
-2.3+3.5+?

Chemistry
37 grams of Ca(OH)2 in 500 ml of solution is

Chemistry
1 NHzSO4 is what molarity

Chemistry
is it 3*10.23square

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

math
Solve the system of equations x + y = 5 x - y = -9

math
Solve the system of equations x + y = 5 x - y = -9

math
3. Solve the system of equations x + 3y = 32 -3x + 2y = 3

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?

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?

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 numb...

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.

English
You're correct

chemistry
what is the punctuation of molar mass

Math
n= -15 n+(-7)-n=

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.

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

math grade 9
6=2/5 (n-1)

grade 9 math
X+6 ~ 5 = -2

History
Why did Theodore Roosevelt mediate the russo-japanese war?

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

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!

U.S. History
What were the results of the european wars in the 1790s?

science
the answer is uniform>

physics
What is the weight on earth of a girl with a mass of 30kg?

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?

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

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

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, grandso...

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 ri...

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

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 S...

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:)

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

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