Monday
December 22, 2014

Posts by Anne


Total # Posts: 621

Science
1) Instead of using the word "random",is it acceptable to say particles in a liquid move about in "different" directions? 2) Why does ice have a higher density than water vapour? Is it because ice has a greater mass in a fixed volume? 3) The statement "...
January 26, 2009

Science-Chemistry
1)Fill in the blanks. In a liquid, particles are _____arranged. They move about in ____ directions and slide over one another. Can I say "irregularly" & "any" as the answers? I know "random directions" is better, but can we accept "any ...
January 26, 2009

chemistry
thank you.
January 22, 2009

chemistry
In an atom, there is a force that holds the protons & neutrons in the nucleus. Is this force called the nuclear force? What about the force of attraction between the nucleus and electrons? Is is called the electrostatic force of attraction?
January 22, 2009

Chemistry
If you look at the Periodic Table,you will see chlorine with a relative atomic mass of 35.5. That means the average mass of a chlorine atom found in nature is ________?
January 22, 2009

Home School. PLEASE HELP ME!!
4. is A its on page 36
January 19, 2009

computers
I was wondering if anybody could please tell me what I need to do I went to work on my power point project and when I turned on my computer a lot of my icons were missing such as my excel power point microsoft office 2007 my documents pictures my back ground ( wall paper is ...
January 16, 2009

Physics
What are the differences between a motor and a generator? I know they both use electromagnets, but how do they use them differently?
January 10, 2009

Physics
If the current in a wire is 0.1A, how long will it take for 10C of charge to pass through it?
January 3, 2009

natural logs
can't use a graphing calculator (not allowed). I'm trying to find the area between curves, if that helps.
December 19, 2008

natural logs
Solve for x: ln(x+1)+ 2 = x^2 – 8x + 12
December 19, 2008

African and Hispanic Studies
What is Jim Cummins' "Intervention Model" all about. Present the elements of this model and in your opinion, can it be successful in reversing the history of failure the Puerto Rican children have experienced in the American schools? Illustrate some of the ...
December 17, 2008

PHysics
a 15g bullet strikes and becomes embedded in a 1.1kg block of wood placed on a surface in front of the gun. if the coefficient of kinetic friction between the block and the surface is 0.25 and the impact drives the block a distance of 95m before it comes to rest, what was the ...
December 6, 2008

chem-help
I got that A was Cl2 and B was CH2 but i do not understand how to get the grams of C produced, i am confused at this point.
December 3, 2008

chem-help
no i did identify compounds A and B i just do not understand how to do part a
December 3, 2008

chem-help
Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15°C...
December 3, 2008

5th grade
There are 7 girls in a bus. Each girl has 7 backpacks. In each backpack, there are 7 big cats. For every big cat there are 7 little cats. Question: How many legs are there in the bus?
November 24, 2008

Chemistry
Thanks!
October 27, 2008

Chemistry
Hi, This is one of my chem hw problems. Does anyone have links to websites that might help me solve this..or equations? It sounds like there are two parts to the question but I'm not sure. Volts and Joules? 1. Electrons are used to determine the structure of crystal ...
October 27, 2008

math help
Is it supposed to be 5 square root of (x ^7 and y^4)? It should be 5 then you expand everything in the sqroot to be (x x x x x x x y y y y) Then take out for every two of each letter, make it one whole one..... so you get 5 x^3 y^2 squareroot (x) I think that's what it ...
October 26, 2008

algebra 2
You should just subtract it as that .... -6 sqroot 7
October 26, 2008

History
Thank you for helping me.
October 20, 2008

History
How many times has the U.S Constitution been altered over the past 200 years?
October 20, 2008

Chem/Physics
1. The half-life for the (first-order) radioactive decay of 14C is 5730 yr (it emits a β ray with an energy of 0.16 MeV). An archaeological sample contained wood that had only 72 percent of the 14C found in living trees. What is its age? I got 500years? 2. The ...
October 15, 2008

Chem/Physics
Hi! I'm having lots of trouble figuring these two out.....if you could help that would be great- thanks!! 1. The half-life for the (first-order) radioactive decay of 14C is 5730 yr (it emits a β ray with an energy of 0.16 MeV). An archaeological sample contained wood ...
October 15, 2008

Physics: Non uniform motion
thanks! but what do i do when the time isnt given like in the first question?
October 2, 2008

Physics: Non uniform motion
I have not done much physics before: I don't get how to do questions that deal with what happened in a particular SECOND So questions like: - A stone which is dropped from rest into a mine shaft falls a distance of 24.5 m DURING THE LAST SECOND. Find depth of the shaft or...
October 2, 2008

Physics
1) A fish jumps out of the water with a speed of 6.36 m/s. If the fish is in a stream with water speed = to 1.5 m/s, how high can the fish jump if it leaves the water traveling vertically upwards relative to the earth? 2)A ball is thrown by someone on a train moving at 10 m/s ...
September 9, 2008

health
what is the definition of social and physical health?
September 3, 2008

Algebra
Solve:25x^4-20x^2+3=0 =(sqrt5/5),-(sqrt5/5),(sqrt15/5),(-sqrt15/5). Can you tell me which one is correct.This is a second post to the first one.
July 5, 2008

Algebra
Thanks
July 5, 2008

Algebra
thanks
July 5, 2008

Algebra
25x^4-20x^2+3=0 = x= i sqrt3/5,-i sqrt3/5. I used the method complete the square. is this is correct
July 5, 2008

help
thanks
July 2, 2008

help
Subtract. Simplify by collecting like radical terms if possible. 3sqrt18-3sqrt2 =6sqrt2 I did help.
July 2, 2008

Algebra
thanks
July 1, 2008

Algebra
Use the foil method to find the product. (4x^6-7)(x^8-4) this is the answer that I got:4x^14-7x^8-16x^6+28
July 1, 2008

Algebra 1
PERFORM THE INDICATED OPERATIONS AND SIMPLIFY. x-8/x-9-x+1/x+9+x-27/x^2-81=x^3-81x^2-7x-27/x^2 Can you check this equation for me.
June 30, 2008

dog behavior re post
please check my answer thanks so much Which of the following best describes when extinction occurs A When a CS is repeatedly prsented and periodically followed ba a US B When a CS is repeatedly presented without the prsention of a US C CS and US are presented together D CS is ...
June 17, 2008

dog behavior
please check my answer thanks so much for your help. True of False generalization means The tendecy to respond to stimuli resmbling the conditioned stmulus I said True
June 17, 2008

dog behavior
please check my answer thank you very much for your help The Premack princciple suggets that A. reinforcement is highly frustrating the dog B. A more desirable activity can serve as a reinforcer for aless desirable activity C reinforcement isn't dependent on the dog ...
June 17, 2008

dog behavior
Please check my answer thank you very much For optimal appetitive classical conditioning which of the following is not important. A The dog should be hungry B THe training enviorment should be relatively distraction free C. THe dog should be give the chane to "use the ...
June 17, 2008

dog behavior
Please check my answer thank you very much True or False Traning a dog to respond to the word "Good" as a conditioned reinforcer is accomplished by saying "GOOD" just before prsenting food I said True
June 17, 2008

dog behavior
please check my answer thank you for your help :) True or False Systematic desensitization can be used to reduce fear I said True
June 10, 2008

dog behavior
please check my answer thanks for your help :) Which of the following is an example of an unconditioned response? A. begging behavior at meal time B barking to get attention C Salivatig when food is taken ito the dog 's mouth D salavating when the dog hears the owner ...
June 10, 2008

dog behavior
please check my answer thanks for your help :) During extinction, an instrumenatl behavior may initially increase as the result of what ? A failure of the dog to obey the new instruction B. an extinction burst C. temorary defiance D. punishment resistance I said A
June 10, 2008

dog behavior
please check my naswer for me thanks for your help :) True or False Ivan Pavlov is credited with the systematic study of conditioned reflexive behavior I said True
June 10, 2008

statistics
. P(at least one head) is the same as 1 - P(no heads). Now, P(no heads) = 1/2 * 1/2 = 1/4 so P(at least one head) = 3/4. P(6) = 1/6. The total is 3/4 * 1/6 = 1/8. actually for part a is it possible the answer could be 1/8?
June 4, 2008

statistics
Another person had the exact same answers as you. This is for a major grade! Thank You!!
June 4, 2008

statistics
If you flipped a penny and a nickel, and rolled a die, what is the probability of: a. getting at least one head on the coins and a 6 on the die? b. getting a head on both coins and a 4 on the die ? c. getting a head on both coins and a 3 or a 5 on the die? d. getting a head on...
June 4, 2008

Chemistry
I dont understand how you get the mols product formed of (c) and why there are moles of a that remain unreacted
May 31, 2008

english
Are you serious? Come up with your own answers and others will help. This is a simple homework that you could get done in minutes.
April 28, 2008

english
Thanks Ms. Sue
April 14, 2008

english
When liquor was banned in 1920, hospitalizations for alcoholism and related diseases plummeted; in 1933, when Prohibition was repealed, alcohol-related illnesses rose sharply again. Legalization of cocaine, heroin, and marijuana would not curb abuse of those substances. a) ...
April 14, 2008

Math
Can someone tell me this is right? Look for the domain. f(x)=log(sub3)(5x+1) 5x+1<=0 (5x/5)<=(-1/5) x<=(-1/5) x>(-1/5) (-1/5,oo) -domain
April 9, 2008

Algebra
I am looking for the domain. f(x)=log(sub3)(5x+1) 5x+1<=0 (5x/5)<=(-1/5) x<=(-1/5) x>(-1/5) (-1/5,oo) -domain
April 9, 2008

Algebra
Can someone tell me how to find a perpendicular line -3x+5y=7 My choices are 7/5 3/5 -5/3 -7/5 I cannot figure this out
March 22, 2008

Geography
What government imposed barriers stop or hinder the export of automobiles? "export" as in shipping to other countries i think?!
March 14, 2008

Calculus
ah!!i was so dumb! i was trying to multiplying numerator and denominator by 1+Z,of course it didnt work out...haha... thankyou !!!!
March 13, 2008

Calculus
two complex numbers Z and W are related by the formula W=(Z+1)/(1-Z) what is W if Z=1.5i? thanks for the help!
March 13, 2008

Calculus--complex numbers
the complex number Z satisfies Z/(Z+4)= 3+2i Find Z. please help thx!
March 13, 2008

Calculus
solve (Z^2)+5=-4/Z^2 how do i solve it?? the answer is +2or-2, or, +or -i. but i really dont know how to get this answer.i tried to multiply both side by Z^2, but i think it just made it more comlicated and i didn't get the right answer at the end...can someone please ...
March 12, 2008

Calculus--complex numbers
thank you so much!!
March 12, 2008

Calculus--complex numbers
let z= a+bi be a complex number. it is given that the quotient (z-i)/(z-1) is purely imaginary. show that z lies on a circle and determine the centre and radius of this circle. OK, here's my working out...( i am using "X" as my times symbol) step1: (a+bi-i)/(a+bi...
March 12, 2008

math
finding the product for (7x+1)(x^2+1) and for the problem (2x+6)(x-10) Also finding the product thank you very much
March 7, 2008

psychology
Mira is a college student who lives alone in an apartment with her cat, Max. Whenever Mira walks into her kitchen and opens the squeaky drawer where Max's food is kept, he begins to salivate and runs into the kitchen, pawing at Mira to be fed. Even when Max has already had...
March 3, 2008

geometry
prove the following statements using a coordinate proof. the diagonals of a rectangle bisect each other.
February 2, 2008

geometry
place each given figure in a coordinate plane. what are the coordinates of each vertex? a) a right triangle b) an isosceles triangle
February 2, 2008

physics
A projectile hits a target placed on a level field. It has arange of 37.0 m. The nagle of launch is 33.4 degrees above the horizontal. What was the initial speed?
January 13, 2008

Chemistry
Oh, I see now. I really appreciate your help :) Have a wonderful day!
December 12, 2007

Chemistry
But I got an answer of 42.5K, which means when I convert it to degrees Celsius I get 42.5K - 273 K = -23.05 degrees Celsius. Does this sound weird to you then?
December 12, 2007

Chemistry
Is it okay to have a negative temperature (in degrees Celsius) in this case?
December 12, 2007

Chemistry
drwls, if you are there, I got an answer of 42.5 Kelvin, so then that means it is a negative number if converted to degrees Celsius? Question: The heat capacity of a bomb calorimeter is 87.5 kJ/K (this value is for the total heat capacity including that of the water jacket ...
December 12, 2007

Chemistry
Hi, if anyone can give me help for any part of the question that would be great! I know how to draw the cell diagram, but am not sure what the half-reactions would be.... Here is the question: Give the cell diagram notation of the electrochemical cell that could be used to ...
December 12, 2007

Chemistry - Thermodynamics
The heat capacity of a bomb calorimeter is 87.5 kJ/K (this value is for the total heat capacity including that of the water jacket around the reaction chamber). If 67.2g of CH4 (g), is combusted under such reaction conditions, what will be the increase in temperature of the ...
December 12, 2007

General Chem - Electrochemistry
Give the cell diagram notation of the electrochemical cell that could be used to determine experimentally the dissociation constant (Kw) of water. The standard reduction potential for O2 + H20 + 4 e- ----> 4OH- is 0.40 V For other possible half-reactions, see your textbook...
December 12, 2007

General Chem
The concentration of potassium ions inside a nerve cell is around 20 to 30 times that outside the cell. Calculate the potential difference between inside and outside a nerve cell, if it depends only on this ionic imbalance.
December 12, 2007

Chemistry - 1st Yr College Level
The corrosion of iron can be thought of as an electrochemical cell reaction. Calculate the voltage difference between two points of corroding iron differing only in their partial pressures of oxygen: 0.20 atm of oxygen at one point and 0.0010 atm of oxygen at the other. The ...
December 11, 2007

essay please check writeacher
Is public civility gone? I agree with the claim that there has been a loss of public civility in today's society. This is due to the fact that many people cannot control their own emotional behavior, People are trying to be different and break with the past, and one way in...
November 29, 2007

grammar
In the sentence, "He is as sly as a fox", what part of speech is "as"? Is "as sly as a fox" an adjective? Is "sly" the object of a preposition? I am so confused. Thank you!
November 27, 2007

english
Thank you!
November 13, 2007

english
Is it great-grandma, great grandma, Great-grandma, Great-Grandma, or Great Grandma? Thanks!
November 13, 2007

Physics
Also, how does the flow of current differ from a superconductor compared with the flow in ordinary conductors?
November 5, 2007

Physics
How does a semiconductor differ from a conductor or an insulator?
November 5, 2007

Chem
this is not done in lab. it's supposed to be calculated. people, like you, fail.
October 29, 2007

Chem
I don't get how to do this: What is the pH of the solution created by combining 11.30 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was ...
October 29, 2007

Math
1/5x-12=22 No answer please just walkthrough process
October 18, 2007

Math
7a-8=15a+8
October 18, 2007

algebra
solve the porportion 2/7 = x/42 the answer is below, but which one A.) 1/2 B.) 12 C.) 2/7 D.) 6 Can you help me pleeezz
October 16, 2007

Physics
pls ans. dis tnx i need help:((
October 9, 2007

Algebra-One to one function
Why is the square of an addiction : (a+b)^2 = a^2+b^2 +2ab? Write an example describing the operation.
September 13, 2007

Dr.Bob (about finding the ml of ethanol)
Calculate how much 95% ethyl alcohol will be required to dissolve 0.75g of sulfanilamide at 78 degrees Celsius.
September 3, 2007

Physics
A race car moves such that its position fits the relationship x=(5m/s) t + (.75m/s3 ) t3 where x is measured in meters and t in seconds. A)Plot a graph of position versus time. B)Determine the instantaneous velocity at t=4s using time intervals of .4s, .2s, and .1s. I'm ...
September 2, 2007

Math
A man walks a certain distance at a certain speed. If he walks 1/2 an hour faster than his usual speed, he will take one hour less to reach his destination. But if he walks 1 km an hour slower than his usual speed, he will take 3hours more to reach his destination. Find the ...
July 5, 2007

physics
A person holds a ladder horizontally at its center. Treating the ladder as a uniform rod of length 3.55 m and mass 10.31 Kg, find the torque the person must exert on the ladder to give it an angular acceleration of 0.406 rad/s2. Should I set the given angular acceleration ...
June 4, 2007

bio (thnxs)
Do transfer RNA have a poly A site? I know it is a anticodon area but I am not sure if this designates it as a poly A site. Thank you
March 17, 2007

English
need some help with commas: 1) I believe these experiences, my interest in blablabla, as well as my enthusiasm for blablabla (comma here or not?) make me a strong candidate for blablabla. 2)These are just some more reasons(comma here or not?) why I think (comma here or not?) I...
March 8, 2007

Question
How would you as a manager promote cultural diversity within your departement, provide example
February 19, 2007

Chemistry
How would calculate % Control when given three sets of values? Would you define percent control please?
January 27, 2007

english
I have a book I need to cite that is a composition of works by the correspondents of the New York Times but it was edited by Bernard Gwertzman and Michael T. Kaufman. How do I do that? You'd simply name them and put Eds. after the second name. There would be no author ...
January 2, 2007

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