Wednesday
August 20, 2014

Posts by Jake


Total # Posts: 1,717

Science
How much force was used to move a box 42m if 13,734 J of work was done on it?
November 16, 2012

physics
What is the angular momentum of a figure skater spinning at 4.4 with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.6 , a radius of 15 , and a mass of 53 ?
November 11, 2012

Physics
A class of 11 students taking an exam has a power output per student of 122 W. Assume that the initial temperature of the room is 18.8oC and that its dimensions are 6.40 m by 14.5 m by 3.50 m. What is the temperature (in oC, do not enter units) of the room at the end of 54.0 ...
November 11, 2012

Physics!
If a water heater has a capacity of 54.4 gallons and a 4910 W heating element, how much time is required to raise the temperature of the water from 19.8oC to 60.0oC? Assume that the heater is well insulated and no water is withdrawn from the tank during this time.
November 11, 2012

Physics
Sorry, rotational inertia I = 6.4 * 10^-3 kg*m^2. I really am stuck on this, can't figure out how to use angular momentum/torque relations to connect the dots and be able to solve for what they're asking ;\.
November 9, 2012

Physics
A gyroscope with rotational inertia 6.4 10-3 kg·m2 is precessing in a horizontal plane at 0.46 rad/s under the influence of a 0.31 N·m torque caused by a force pointing vertically downward. How fast is the gyroscope spinning on its axis?
November 9, 2012

chemistry
I don't think this makes sense... there are not any oxygens on the left so Im pretty sure it doesn't work, unless you just add oxygen to the left im not sure you can do that though... If so it would look like this KNO3 --> KNO3 + O ^add O to this side as well Once ...
November 8, 2012

chemistry
Fe(s) +Pb^2 (aq)---->Fe ^2+ (aq) +Pb(s) which reactant has been oxidized
November 4, 2012

English 8R - Homework Check (plzzzz read)
Very obvious you have copied... we have all done it before... just put it in your own words (especially in the beginning)
November 4, 2012

Science
wuz up
November 2, 2012

Calculus
A rectangular cardboard poser is to have 150 sq ft in for printed matter. It is to have a 3inch margin at the top and bottom and a 2inch margin at the right and left. Find the dimensions of the poser so that the amount of cardboard used is minimized.
October 29, 2012

math
explain why the equation x^(5)-3x+1=0 must have a solution with 0 < x <1
October 29, 2012

Chemistry
Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green solution 25.0mL 1.60M ...
October 29, 2012

Physics
because b and m_o are constants and i believe that e^-kt is taken as a constand as well. Leaving dx to be integrated between 0 and x(t). am i correct? more opinions welcomed please
October 25, 2012

Physics
I think that the answer comes out to be v(t)=(uk-g)t - b*m_o*(e^-kt)*x(t)
October 25, 2012

Physics
A rocket ascends from rest in a uniform gravitational field by ejecting exhaust with constant speed u. Assume that the rate at which mass is expelled is given by dm/dt=mk, where m is the instantaneous mass of the rocket and k is a cosntant, and that the rocket is retarded by ...
October 25, 2012

BC Calculus
Use linear approximation to estimate sec^2(pi/4 + .025) Need help quickly please!! :)
October 24, 2012

math
Samuel solved the equation h – 234 = 1,192 and found the solution to be h = 958. Is he correct? He is right I think because when you subtract 234 from 1192 it equals 958 right?
October 23, 2012

Calculus
simplify log2(4x^2 2^x)
October 22, 2012

math
In an election, Kate lost to Lee by 32 votes. Because the vote was so close, they decided to have a re-vote. All of Kate's supporters voted fro her again, but some of Lee's supporters switched their votes to vote for Kate. Kate won by the revote by 6 votes. How may of ...
October 21, 2012

math
What is the distance between the rectangular coordinates (1,16) and (10,4)?
October 21, 2012

goverment
in the recent presidential election, romney's comment "binders full of woman" really offended people. why were people so offended, i dont really understand, did he mean something bad?
October 21, 2012

calculus
Write h(x) = 6x^4 - 2x^2 + 1 as a composition of two functions f and g
October 20, 2012

Literature
13. Scan this line from Cowley's poem: "its hills bent low within my reach." How many feet does this line contain? A. 5 B. 7 C. 6 [D. 4]
October 15, 2012

Literature
c is the correct answer finished the tesr
October 15, 2012

Literature
5. As we find with most songs, in poetry [A. there's no specific point of view.] B. each couplet must rhyme. C. sound and content have equal weight. D. meanings are hidden in imprecise words.
October 15, 2012

Literature
2. In The Call of the Wild, the bond between Buck and Thornton is best explained by observing that A. dog and man were like mirror opposites. [B. dog and man were both in touch with their primordial nature.] C. Buck had helped Thornton pay off his debts. D. Buck found Thornton...
October 15, 2012

chemistry
what fraction of an original sample of a radioactive isotope remains after three half-lives have passed? 1/8?
October 13, 2012

Statistics
A 50-question true-false exam is given. Each correct answer is worth 10 points. Consider an unprepared student who randomly guesses on each question. In your solution, please be sure to show the exact steps you used to arrive at the answers. A. If 5 points are deducted for ...
October 10, 2012

Calculus
thank you
October 9, 2012

Calculus
Find the derivatives of the function f(y)= sinh(sinh(7y).
October 9, 2012

math
A candle is 17 in. tall after burning for 3 hours. After 5 hours, it is 15 in. tall. Write a linear equation to model the relationship between height h of the candle and time t. Predict how tall the candle will be after burning 8 hours.
October 9, 2012

world history
its A
October 8, 2012

world history
4. Which pope wanted Christians to unite to redress what he saw as an imbalance of power between Christianity and Islam? A. Pope Urban II B. Pope Clement VI [C. Pope Benedict] D. Pope John Paul
October 8, 2012

world history
yes
October 7, 2012

world history
13. _______ was the first thinker to postulate that numbers are real, not abstractions. A. Hui Shih [B. Pythagoras] C. Parmenides D. Aristotle
October 6, 2012

world history
its d
October 6, 2012

world history
i cant find where it says this
October 6, 2012

world history
12. The Chinese philosopher Xunzi wrote that if a person attempted to cure rheumatism by beating a drum and sacrificing a pig to the gods, then the A. rheumatism wouldn't get better because proper therapy required playing a flute and sacrificing a chicken. B. rheumatism ...
October 6, 2012

world history
11. Which of the following is not one of the new thoughts of or about God that were formulated in the Axial Age? A. Many Gods B. Divine God [C. Single God] D. Involved God
October 6, 2012

world history
8. What strategy did Buddhist and Christian missionaries employ to spread their faith that Muslims didn't? A. Conversion of kings and other elite figures B. Use of artifacts C. Forceful conversion of others [D. Conversion of merchants]
October 6, 2012

world history
is it c
October 6, 2012

world history
7. In the development of the Roman Empire, the Romans treated citizenship as A. a benefit worthy only of peoples who had freely joined them. [B. belonging only to native Romans.] C. meaningless because the Roman Empire was tyrannical. D. something to be shared with conquered ...
October 6, 2012

world history
6. After its conquest by Alexander the Great, the government of the Persian Empire A. was transformed into a democratic monarchy. B. became a democracy. C. was ruled by a traditional Macedonian monarchy. [D. was maintained more or less intact.]
October 6, 2012

world history
5. What religion, which had potentially universal appeal, was created by Gautama Siddhartha in India? [A. Buddhism] B. Hinduism C. Zoroastrianism D. Jainism
October 6, 2012

world history
3. What geographic feature at times made life difficult for the Moche of South America? A. Mountains [B. Desert] C. Lack of access to the sea D. Unpredictable rivers
October 6, 2012

world history
2. In forming his government, Asoka recruited what group to serve as bureaucrats? A. Traditional Brahman elites [B. The Buddhist clergy] C. The military elite D. The rising merchant class
October 6, 2012

world history
1. Which of the following were major items of trade in the West African states of Ghana and Gao? A. Bananas and copper B. Cacao beans and slaves [C. Gold and salt] D. Coffee and sugar
October 6, 2012

american history
Thomas alva edison
October 5, 2012

biology
6. During division in cellular reproduction, the DNA and cytoplasm of the parent cell is distributed to two A. chromosomes. B. clones. C. simplified cells. [D. daughter cells.]
October 3, 2012

economics
When the price of X is $1 and the price of Y is $1 and income is I, Joe Panther spends $100 on good X. One day Joe is walking down Downer street and is dismayed to discover that the price of good X has increased to $2. However, moments later Joe is delighted to find a $100 ...
October 2, 2012

chemistry
The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our lungs as a gas. C6H12O6(aq) + 6 O2(g) → 6 CO2(g) + 6 H2O(l) Calculate the volume of dry CO2 produced at body temperature (37°C) and 0.980 atm when 25.5 g of glucose is...
September 30, 2012

physical science
explain why elements in a group on the periodic table have similar chemical properties?
September 28, 2012

chemistry
56
September 26, 2012

adverb
She will always see the truth an adverb is "always" or "will always"? please help
September 26, 2012

Social Studies
I have to create an ad based on my knowledge of 1610 o get more settlers to come to the new world
September 26, 2012

reading
In "The Adventure of Dying Detective" what is Mr. Culbertson Smith's motivation? A) To become Sherlock Holmes' partner B) To kill Sherlock Holmes so that he can get away with Savage's murder C) To frame Sherlock Holmes for Savage's murder D) To poison...
September 25, 2012

Reading
In The Adventure of Dying Detective, it is true Inspector morton was signaled to come to sherlock Holmes' room when watson yelled for him?
September 25, 2012

Math - Quadratic Factor
thanks
September 24, 2012

Math - Quadratic Factor
can someone explain how to do this problem, please. 6x^2 + 13x +2 + 0
September 24, 2012

chemistry
A photocell is a device used to measure the intensity of light. In a certain experiment, when light of wavelength 530 nm is directed on to the photocell, electrons are emitted at the rate of 5.1 10-13 Coulombs/sec. Assume that each photon that impinges on the photocell emits ...
September 23, 2012

word power
8. Often applied to politicians, the term _______ suggests hiding one's feelings while obscuring or "spinning" facts. A. simulate B. dissimulate C. vacillate [D. dissemble]
September 21, 2012

word power
13. One who is intrepid [A. is brave and fearless.] B. is reckless and foolhardy. C. practices self-honesty. D. doesn't stumble and fall.
September 20, 2012

word power
9. A person described as perspicacious is [A. smart and perceptive.] B. inclined to be optimistic. C. inclined to be pessimistic. D. foolishly persistent.
September 20, 2012

word power
i think it is b poised
September 20, 2012

word power
4. Someone who is urbane is A. tireless. B. poised. C. witty. [D. friendly.]
September 20, 2012

word power
19. The treatment based on the theory of pressure on blood vessels and nerves is A. osteomyelitis. B. chiropody. [C. osteopathy.] D. psychotherapy.
September 17, 2012

word power
18. Which of the following sentences is grammatically correct? A. That field belongs to my wife and I. B. My brother Billy and me went to the movies. [C. Jerry handed the instructions to the boys and me.] D. Mother gave Jeff and I second helpings.
September 17, 2012

Calculus
find an equation of the line tangent to the equation at the given point. f(x)=5x^2 at x=10
September 16, 2012

math
3r/4=1/3 what is r please explain
September 16, 2012

Physics
Mary needs to row her boat across a 100m wide river that is flowing to the east at a speed of 1.0m/s. Mary can row with a speed of .0m/s a) If mary points her boat due north, how dar from her intended landing spot will she be when she reaches the opposite shore? B) What is her...
September 14, 2012

math
Tom has somee cubes that are two proudest cm on each side. How many of them will fit into a box that is a cube with each side four cm long?
September 13, 2012

word power
thank you for the help i got a 100 percent
September 13, 2012

word power
18. John and I are going to the store. Would you like to come along with [A. me and him?] B. I and him? C. him and I? D. him and me?
September 13, 2012

word power
17. Psyche, the Greek root of "psychology" and "psychosis" means A. diseased condition. [B. mind or spirit.] C. medical healing. D. mystical healing.
September 13, 2012

word power
14. Michael is entirely _______ in gambling. A. noninterested B. disinterested [C. uninterested] D. misinterested
September 13, 2012

word power
2. Which one of the following words has a negative connotation? [A. Pedagogue] B. Inoculate C. Ophthalmological D. Taxidermy
September 13, 2012

math
72-12=
September 12, 2012

math
What expression is a counterexample to the statement The whole numbers are closed under division 2 divided by 10th 10 divided by 2 Please explain to me which one is the correct
September 12, 2012

math
Why did the cbicken add its opposite to itself? To get to the other side of the equation
September 11, 2012

Math
Find the volume of the solid generated by revolving the following region about the given axis The region in the first quadrant bounded above by the curve y=x^2, below by the x-axis and on the right by the line x=1, about the line x=-4
September 11, 2012

chemistry
How many atoms of lead are there in a river with 2.95x10-6mol of lead?
September 11, 2012

physics
5) After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance 1.5 meters above the ground, and is moving with a speed of 22.0 m/s when it reaches a maximum height of 9.0 m above the ground. What is the speed of the ball when it leaves ...
September 10, 2012

Physics
A soccer ball is kicked with an initial horizontal velocity of 19.0 m/s and an initial vertical velocity of 14.0 m/s 6) How high above the ground is the ball 1.1 seconds after it is kicked?
September 10, 2012

algebra
The total toll charge for one car and five bicycles to cross a bridge is $7.50. The toll for a car is $1.50 more than for a bicycle. Find the cost for a car to cross the bridge.
September 10, 2012

Accounting
Urquhart Corporation applies manufacturing overhead on the basis of direct labor-hours. At the beginning of the most recent year, the company based its predetermined overhead rate on total estimated overhead of $100,000 and 3,600 estimated direct labor-hours. Actual ...
September 5, 2012

physics
A car starts from rest and travels for 4.5 s with a uniform acceleration of +1.8 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.8 m/s2. The breaks are applied for 1.80 s.
September 4, 2012

Calculus
Owing to an innovative rural public health program, infant mortality in Senegal, West Africa, is being reduced at a rate of 10% per year. How long will it take for infant mortality to be reduced by 50%?
September 2, 2012

math
What are the 3 irrational #s and 3 not real numbers
September 1, 2012

chemistry
Conc hno3 is not given.
August 30, 2012

chemistry
How many milliliter of conc. HNO3 would be necessary to prepare 500ml of 20% of HNO3 solution?
August 30, 2012

Physics
A delivery truck travels 20 blocks north, 15 blocks east and 18 blocks south. What is its final displacement from the origin? Assume the blocks are equal length.
August 28, 2012

physics
A delivery truck travels 20 blocks north, 15 blocks east and 18 blocks south. What is its final displacement from the origin? Assume the blocks are equal length.
August 28, 2012

science
I need a sentence using the word cytoplasm and I'm in 5th grade.
August 27, 2012

chemistry
How do you make a venn diagram of the 6 branches of chemistry? (Inorganic chemistry, organic chemistry, biochemistry, nuclear chemistry, physical chemistry, and analytical chemistry) like where would they go in the 3 circles
August 26, 2012

writing skills
20. A disadvantage of using a sentence outline instead of a topic outline is that a sentence outline is often A. rigid. B. factually grounded. C. underdeveloped. [D. time-consuming.]
August 23, 2012

writing skills
18. You need to write an essay about hot air ballooning. You know you've seen a good book on this topic, but you can't remember the name of the book or the name of the author. How could you most easily find this book in the library? A. Locate the author card for the ...
August 23, 2012

writing skills
17. What do we call an idea that will make the reader take notice and want to read on? A. Summary [B. Hook] C. Card D. Point of view
August 23, 2012

writing skills
15. The World Almanac is a book of A. living notable Americans. [B. facts and statistics.] C. synonyms. D. articles published in magazines
August 23, 2012

writing skills
14. Once you acquire these two basic skills, you'll be able to transform a vague idea in your mind into a coherent piece of writing. A. Describing people and writing conversation B. Doing interviews and browsing through books [C. Doing research and organizing your ideas] D...
August 23, 2012

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