Saturday
March 28, 2015

Posts by elizabeth


Total # Posts: 866

chemistry
a 500ml sample of oxygen gas at 24 degree celsius was prepared by decomposing a 3% aqueous soution of hydrogen peroxide in the presence of manganese catalyst by the reaction: 2h2o2 = 2 h20 + o2... the oxygen was colletec by displacement of water. the total pressure of gas ...
July 10, 2011

Chemistry
a tank contains a mixture of 3.0 mol of nitrogen gas, 2.0 mol of oxygen gas and 1.0 of carbon dioxide gas at 25 degrees celsius and a total pressure of 10.0 atm. Calculate the partial pressure in torr of each gas in the mixture?
July 10, 2011

microeconomics
Sam Johnson started a small machine shop, Machines, Inc., in his garage and incorporated it in March of 2002 as a calendar-year corporation. At that time, he began using his personal computer and tools solely for the business as part of his contribution to the corporation. The...
July 3, 2011

finance
Entrepreneur Edward is planning to open a business selling ice cream. He knows that the price of ice cream is determined by the forces of supply and demand, but he wants a report outlining five specific events that can be expected to cause the equilibrium price of ice cream to...
July 3, 2011

finance
On June 26, 2004, Elaine purchased and placed into service a new computer system costing $8,000. The computer system was used 80 percent for business and 20 percent for personal use in both 2004 and 2005. Elaine claimed only regular MACRS depreciation. In 2006, the computer ...
July 2, 2011

finance
On June 26, 2004, Elaine purchased and placed into service a new computer system costing $8,000. The computer system was used 80 percent for business and 20 percent for personal use in both 2004 and 2005. Elaine claimed only regular MACRS depreciation. In 2006, the computer ...
July 2, 2011

Chemistry
How do you know which reactions are spontaneous? For example, the equation I2(s)+2NaF(aq)->F2(g)+2NaI(aq) is spontaneous. Why is this so?
June 22, 2011

college chemistry
why do halogens tend to form diatomic molecules?
June 17, 2011

chemistry
If 1500 blood cells were lined up, they would make a row 1.0 inch long. What is the average diameter of the blood cells in micrometer(If l inch = 2.54cm)?.
June 9, 2011

maths
how can i slove 5x-2(x-5)=15
May 30, 2011

Physics
How Fast would a satellite have to move to stay in an orbit 300 miles above the Earths surface?
May 22, 2011

Literature
What role does fate play in the events of Romeo and Juliet? How are the young lovers victims of misunderstandings, miscommunications,and plain bad luck? How do these elements affect the way readers and audience members are affected by their story?
May 17, 2011

Maths
AB II CD meet at E find out the angle E.
May 17, 2011

physics
.250 kg toy airplane is suspended from the ceiling in a conical pendulum. It flies with a radius of 10 cm, and has a period of 20 seconds. Find the centripetal force acting on the plane?
May 14, 2011

ela
shrimp
May 10, 2011

ela
wut do i like to eat?
May 10, 2011

maths
What is the gradient of a line that has an angle of inclination of 75°? Enter the answer, rounded to 4 significant figures in the box below. the answer should be a number. ???
May 8, 2011

Com/155
Did I pick the correct pronoun? I had to sit down with my sister the other day about her spending habits. Her being the pronoun.
May 6, 2011

algebra 2
can someone tell me how to expand the bionomial (d-2)^6?
May 6, 2011

math
A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times?
April 29, 2011

math
A bag contains 7 red checkers and 11 black checkers. One checker is drawn and replaced. Then a second checker is drawn. What is the probability that a red checker was drawn both times?
April 29, 2011

math
A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times?
April 29, 2011

math
Marcus flips a coin and tosses a six-sided die with the sides numbered 1-6. What is the probaility that he gets a head on the coin and a number divisible by 3 on the die?
April 29, 2011

Physics
A railroad car with a mass of 1.93 104 kg moving at 3.24 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.16 m/s. (a) What is the speed of the three joined cars after the ...
April 24, 2011

Microeconomics
Search: Consider two resource markets in which the demand curves slope downward. In market A, the supply curve is horizontal, equilibrium price is $6, and 100 units of the resource are hired. In market B, the supply curve is vertical, equilibrium price is $20, and 30 units of ...
April 24, 2011

Physics
A 74.5 kg ice skater moving to the right with a velocity of 2.62 m/s throws a 0.21 kg snowball to the right with a velocity of 23.8 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and...
April 24, 2011

maths
I THINK I GOT IT ITS NEGATIVE AS THE COEFFIENT IS -X^2 WHICH IS NEGATIVE. IS THIS RIGHT?
April 23, 2011

maths
the graph of y=-(x^2/3)=2x=24 is a parabola. 1) is the parabola u-shaped or n-shaped. how can you tell this from the equation?
April 23, 2011

Character Buidling
My Character Building Teacher had given me a project to write the names of the people we hate on a non-boiled raw potato, and put it inside a clear plastic, locked, and not to be opened until the project is finished. Everyday, we should take an observation of the potato and ...
April 23, 2011

physics
An 85.4 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 22.4 m behind the ship, at rest relative to the spaceship. The only way to return to ...
April 20, 2011

Physics
Two billiard balls with identical masses and sliding in opposite directions have an elastic head-on collision. Before the collision, each ball has a speed of 20 cm/s. Find the speed of each billiard ball immediately after the collision.
April 20, 2011

maths
My kids are stuck on this they've no idea what to do and I can't help them out either! Darren throws a stone from the top of a vertical cliff into the sea below. The trajectory of the stone can be modelled by the quadratic equation y = -(x^2/3)+2x+24 where y represents...
April 20, 2011

Character Buidling
My Character Building Teacher had given me a project to write the names of the people we hate on a non-boiled raw potato, and put it inside a clear plastic, locked, and not to be opened until the project is finished. Everyday, we should take an observation of the potato and ...
April 17, 2011

math
Manuel wants to calculate how many miles his farthers car travels on one gallon of gas. He knows that on a fu 15- gallon tank of gas, the car can travel 225 miles. Write an proportion that he could use to calculate the cars mileage per gallon(x)
April 13, 2011

finance
1–2 pages Details: Develop a personal financial planning budget. This budget can represent a budget for a fictitious individual; however, make sure you include the following: Information you would need to prepare this budget Income Taxes Expenses Personal expenses
April 11, 2011

physics
During peak shopping season at Northbrook Court, an escalator elevates 1233 passengers a vertical distance of 7.43 meters over the course of 30.3 minutes. If the average mass of the passengers is 55.3 kg, determine the power delivered by the escalator to the people.
April 11, 2011

Physics
A person doing a chin-up weighs 710 N, disregarding the weight of the arms. During the first 26.5 cm of the lift, each arm exerts an upward force of 356 N on the torso. If the upward movement starts from rest, what is the person's speed at this point?
April 11, 2011

Physics
A skier of mass 73.5 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 58 m up a 32° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?
April 11, 2011

law
english law. what are the powers of the court of appeal.
April 9, 2011

law--
discuss whether or not the changes to the selection of judges is leading to a wider cross section of people becoming judges. please help thanks
April 9, 2011

English huckleberry finn
The book ends with Huck saying he's going to "light out for the Territory ahead of the rest." But there's a part of me that wonders if he won't decide to go back home to the Widow's with his friends. * Write a short paragraph or two to make another &...
April 7, 2011

English
Huck struggles to decide what he should do when his heart and his conscience pull him in different directions. He eventually decides to go with his heart. * Write a short essay explaining why you agree or disagree that this was a good strategy for Huck to pursue. * Look back ...
April 7, 2011

world history
Well, actually I think this was not present day.
April 5, 2011

world history
English and French are official languages of Canada. Laws promote French culture and language. Literature may be published in French and English. They made Quebec a separate country.
April 5, 2011

world history
Which is NOT a way in which the Canadian government attempted to cooperate with French separatists?
April 5, 2011

World History
In what regions did Latin Christendom expand during the period of the early Mongol expansion?
March 30, 2011

maths
A ball is launched into the air from below a cliff. after t seconds its height above the cliff top is h metres, and is given by the equation h =  − 4.9t 2 + 19.6t − 14.6. Calculate, to the nearest metre, the ...
March 29, 2011

A level law
what are the disadvantages of the current system of training barristers and solicitors ( in england ) thank you
March 29, 2011

A level law
what are the disadvantages of the current system of training barristers and solicitors please help
March 29, 2011

maths
The following quadratic equation has the integer solutions x^2+5x-6=0 what is the positive solution of the equation
March 29, 2011

maths
Calculate the discriminant of the quadratic expression 4x^2-x-3
March 29, 2011

Geometry
The surface areas of two similar figures are given. The volume of the largwe figure is given. Find the volume of the smaller figure if the SA= 25 cm SA= 36cm and the V= 216cm?
March 22, 2011

physics
7.03m/s
March 20, 2011

7th grade math pre algebra
Thank you Ms. Sue
March 10, 2011

7th grade math pre algebra
I'm confused about this math question my teacher gave us today. Bowser's dog food is 40% meat. How much dog food would Bowser eat in order to get 11 kgs of meat?
March 10, 2011

law
which types of sentence would be most approppiate where the main aims of sentencing are rehabilitation and reform
March 5, 2011

A level law
discribe the custodial, community and other sentences available for adult offenders convicted in the crown court. 2. which types of sentences would be more appropriate where the main aims of sentencing are rehabilitation and reform thank you
March 2, 2011

Measurment
What is the area of this triangle with 22,16,28 And a nine in the middle?
March 1, 2011

Fractions
Maria played with her dolls for 45 minutes.this coima also be written as?
March 1, 2011

Measurment
What is the area of this triangle 22 by 16 by 28 inches inside is 9in?
February 28, 2011

Measurment
What is the area of this triangle 22 by 16 by 28 inches inside is 9in?
February 28, 2011

Measurment
What is the area of this triangle 22 by 16 by 28 inches
February 28, 2011

Math
54.99 17.00
February 28, 2011

A Level Law
what are sentences for young offenders and what particular aims of sentencing are relevant for young offenders
February 25, 2011

Chemistry
How much energy is gained by a 40.8g sample of water whose temperature increases from 22 degrees celsius to 35 degrees celsius when left in the sun?
February 23, 2011

A Level Law
fred has been arrested for murder what are his rights at police station and are they adequatly protected during detention searches and interviews
February 23, 2011

4th grade math
what is the line segment of 2 7/8?
February 22, 2011

Math
What is 20x+3=5 what is x. What is 4-x=9 what is x. If you can anser these i have a lot more i`m having problems with please help.
February 19, 2011

algebra
I don`t know exsactlly the anser but i do think that like you said each letter represents a number i was thinking A=1 B=2 And so on so it would be some thing like that don`t blame me though if you get it wrong i am not sure.
February 19, 2011

Probability
A coin is tossed 3 times. What is the probability of getting 2 heads and 1 tail?
February 18, 2011

8th Grade Algebra
Tim and Sasha have a bag containing 7 red marbles, 3 blue marbles, 6 white marbles, and 4 yellow marbles. Tim reaches in, without looking, pulls out a marble, records the color, and then puts the marble back.Sasha then does the same thing. What is the probability that Tim and ...
February 18, 2011

8th Grade Probability
A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green?
February 14, 2011

8th Grade Algebra
If Julie draws a card from a standard deck of well-shuffled playing cards, what is the probability that he draws either an ace or a heart?
February 14, 2011

8th grade Algebra
In a drawing for a dvd player, there are 100 tickets in a box.Five of the cards are marked with a star and the rest are marked with an X. To win, Carmen must draw two cards, without replacement, both of which are marked with a star. What is the probability that Carmen will win...
February 14, 2011

chemistry
Given: hexane- -density at 25 degrees Celsius (.660g/ml) -Vapor pressure of pure substance at 25 degrees Celsius (150 torr) -heat if vaporization (21.0 kj/mol) -55 mL What mass of hexane vaporizes at 25 degrees Celsius?
February 8, 2011

ecology
Were should I look for info on land and aquatic biomes, if all I want to know is the plats that grow there, and the animals that live there, as well as the annual ammount of rainfall and average temp. without having to do a lot of reading.
February 8, 2011

Literary Analysis
I need help "translating" this part into more simple english from the poem One Step at a Time by Joseph Morris. Here is the part: "He will stand upon Life's summit and will know that joy sublime which is his alone who dares to prove his soul."
February 3, 2011

8th grade Algebra
The nearest would be 18. Right?
January 31, 2011

8th grade Algebra
Marianna's rectangular garden is 15 yards long and 10 yards wide. She wants to stretch a wire for hanging lights from one corner of the garden to the opposite. About how long should the wire be?
January 31, 2011

science
When you freeze water, 80 calories of heat are released into the surroundings for every gram of water that freezes. This is known as the "latent heat of fusion" of water, which is 80 cal/g. Heat of fusion is a characteristic property. Theoretically, if you could &...
January 31, 2011

8th grade Algebra
Sharon and her camping group hiked 6 miles due north, stopped for lunch, and then hiked 8 miles due west, stopping at ther campsite for the night. What is the straight line distance from their original starting place to the campsite?
January 30, 2011

Algebra 1
A rectangular piece of art is 4 meters wide and 6 meters long. It is surrounded by a uniform sidewalk. If the area of the uniform sidewalk is 39 square meters, how wide is the sidewalk
January 26, 2011

11th grade math
How do you do Absolute Value Functions with graphs?
January 13, 2011

chemistry
What is the difference between a length on 2 cm and a length of 2.0 cm?
January 12, 2011

math
what is symmetry
January 10, 2011

3rd grade Math
what is symmetry
January 6, 2011

related rates problems
Water pours out of a conical tank of height 10 feet and radius 4 feet at a rate of 10 cubic feet per minute. How fast is the water level changing when it is 5 feet high?
December 30, 2010

related rates calculus problem
A balloon is being filled with air at a rate of 3 cubic meters per minute. Find the rate at which the radius is changing when the volume is 113.0973355 cubic meters.
December 30, 2010

COMP/160 College
I need help with writting sentences using three comparatives and superlatives, about personal finance
December 29, 2010

Algebra2
how to solve a matrice when it's like b21 and it givec you to sets of matrices like AND IT SAYS TO ID EACH ELEMENT A.)O -1 B.)6 -3 1/2 1.5 3 AND 7 -2
December 29, 2010

us history
Thank you for the start. One last question....what is a philosophical ideal??
December 26, 2010

us history
Ms. Sue, how should I begin to try to find answers for these points.
December 26, 2010

us history
I need help trying to figure out how to even begin an essay. Write in the perspective of a Pennsylvania farmer in the 1700s. - The philosophical ideals embodied in the Declaration of Independence. - The similarities and differences of the philosophies in the Article of ...
December 26, 2010

British Lit.
I need to explain Beowulf's speech lines 365-428. topic audience and tone of the speech.
December 21, 2010

japanese
What do the following sentences mean translated to English? Kore no han wa watashi no desu To no soto ni obaki ga imasu
December 20, 2010

8th grade math
Can you please check my answer? A spherical balloon has a volume of 268 cubic cm. If more air is pumped in so that its radius is 3 times as long, what is its new volume? My answer: 2,412 cubic cm
December 13, 2010

8th grade math
Greta is designing a page for the yearbook and needs to know the area of her 8 in. x 10 in. picture after she crops it. If she makes the length and width of the picture 5/8 of the original, how does the area of the picture change?
December 13, 2010

com/156
can you help on how to write an outline for credit card companies should not be on campus marketing to college students
December 3, 2010

Business
Is it possible for companies both to maximize financial value for shareholders and to act irresponsibly in the communities in which they operate, to treat their employees, customers, and suppliers well, and to engage in activities that are good for the environment? In your ...
December 3, 2010

8th Grade Math
Is the answer 6396 square yards?
November 28, 2010

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