Saturday
May 30, 2015

Posts by D


Total # Posts: 335

Physics Mehanics
A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip. (Hint: Consider the stick to be a thin rod and use the conservation of energy ...
February 24, 2011

Physics Mehanics
In the figure below, wheel A of radius rA = 11 cm is coupled by belt B to wheel C of radius rC = 23 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2. Find the time needed for wheel C to reach an angular speed of 110 rev/min, assuming the...
February 24, 2011

Physics Mechanics
Thanks a lot. Your answer are both right. Thank you so very much.
February 23, 2011

Physics Mechanics
Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart, and they then fly off in opposite directions, free of the spring. The mass of A is 3.00 times the mass of B, and the energy stored in the ...
February 23, 2011

Physics Mechanics
Thank you so much drwls. You're a life saver. Thanks a lot! :)
February 20, 2011

Physics Mechanics
A banked circular highway curve is designed for traffic moving at 57 km/h. The radius of the curve is 211 m. Traffic is moving along the highway at 48 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the ...
February 20, 2011

Physics
Suppose that the terminal speed of a particular sky diver is 170 km/h in the spread-eagle position and 315 km/h in the nosedive position. Assuming that the diver's drag coefficient C does not change from one position to the other, find the ratio of the effective cross-...
February 20, 2011

Precalc
Its #2 which is 3 because you add all the degrees of all the parenthesis and add them up and that's ur answer
February 20, 2011

Science
Its 133.88 degree Celsius.. Hope it helps :)
February 20, 2011

Physics
In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.87 m by the horizontal 25 N force from the broom and then has a speed of 1.58 m/s...
February 20, 2011

Algerbra 1
4.50
February 10, 2011

Chem (but i think its physics)
203lbs= 902.94N 110ft= 33.528m 902.94*33.528*3=90 822J 90822J* 1Calorie/(4184J) = 21.7
February 3, 2011

Chem (but i think its physics)
Ok so this problem appeared in my online chem homework, but it looks alot more like a physics problem. I have no idea how to do it A 203 lb man eats an order of French Fries consuming 250 Cal of food energy. Afterwards he feels guilty and decides to work off the excess ...
February 3, 2011

physics
Ffdd
February 2, 2011

8th grade science
what voltage produces a current of 500 amps with a resistance of 50 ohms?
January 19, 2011

chemistry
Sorry Doc but the satallite is 30 miles above the earth and the question states there and back. please check again.
January 13, 2011

Chemistry
What is the molality of a solution of sucrose(molar mass=342) dissolved in water that is 25% sucrose by mass?
January 9, 2011

chemistry
Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides i'm not sure about II because HF has the highest boiling point but fluorine and chloride fit...
December 31, 2010

chemistry
Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides i'm not sure about II because HF has the highest boiling point but fluorine and chloride fit...
December 31, 2010

chemistry
At 100 degrees celsius, the ratio of the average kinetic energy of oxygen molecules, O2, to the average kinetic energy of methane molecules, CH4, is: A) 4:1 B) 1:4 C) 1:2 D) 1:1 I think it's D because the kelvin temperature is the same for both collection of gases, and ...
December 31, 2010

physics
at what angle with respect to the horizontal should the shot put be launched if the starting height is 2.0m to have the greatest range?
December 11, 2010

12th grade
Firm A offer 40,000 salary with $2,000 increase evey year. FIRM B offer 38,500 salary with 5% increse every year. After how many year he will make same money?
December 6, 2010

Chemistry
Before 1962,dimes minted in the US contained the precious metal silver.A 2.08 gram dime is dissolved in nitric acid and reacted with saturated sodium chloride solution. This process precipitates all the silver in the dime as 342mg of AgCl(s). How many moles of silver did the ...
December 6, 2010

Chemistry
Before 1962,dimes minted in the US contained the precious metal silver.A 2.08 gram dime is dissolved in nitric acid and reacted with saturated sodium chloride solution. This process precipitates all the silver in the dime as 342mg of AgCl(s). How many moles of silver did the ...
December 6, 2010

earth
A cold front traveling at an average speed of 35 km/h eastward is 280 km due west of you. Appoximately how long will it be before your location experiences a sudden temperature drop?
December 3, 2010

Algebra
120
December 2, 2010

test
235U 92
November 29, 2010

Chemistry
Example: 235U 92
November 29, 2010

algebra
how can 2 boys weighing 100lbs each and a man weighing 200lbs cross the river in a boat that only holds 200lbs safely?
November 20, 2010

English
There is
November 20, 2010

5th grade
if 5/17 of region is shaded what part is not?
November 11, 2010

Calculus
A particle moves in a straight line with velocity t^-2 - 1/9 ft/s. Find the total displacement and total distance traveled over the time interval [1,4]. I found out that the total displacement is .4116 But I cannot find the total distance traveled.
November 11, 2010

Physics
where did the 3x/5 come from
November 7, 2010

AP Chemistry
What is the Dumas Method in regards to the molas mass of a gas?
November 4, 2010

AP Chemistry
The molar mass of a volatile liquid (one which vaporizes easily) can be determined by a the DUMAS METHOD.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with a piece of foil that has a small hole (...
November 4, 2010

physics
balls
October 31, 2010

chem
What is the pH of 0.2 M HN3?
October 31, 2010

History
when i said even the hebrews tried to secure their race i meant before the world wars.
October 17, 2010

History
LBN means white in akkadian and they were a peaceful people. Hitler decided to take the sigma doubled as his symbol as it dealt with what he thought he was being the furor after the king named sin. which was also akkadian. Illuminati have thier roots in this in tales dealing ...
October 17, 2010

History
Anglo saxons get thier start in akkadian for LBN or palestine which is lebanon so i am led to think. It deals with old ritualistic root philosophies on the beginning of the histories of the civilizations which was the dragon then the beast then the lamb like beast. Sargon ...
October 17, 2010

Chem
5. The LC50 for fluorine is 0.29 mg/m3. What is this in ppm at 25 oC and 1 atm pressure? How does this compare to the PEL?
October 17, 2010

College Chem
Recycling of PET soft drink bottles involves heating with methanol and an acid catalyst to liberate ethylene glycol and dimethylterphthalate (methyl ester of pthalic acid). These can then be used as monomers to make new PET products. Write an equation for this recycling reaction.
October 4, 2010

College Chem
How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned? C7H8 + 9O2 ==> 7CO2 + 4H2O 1 gallon toluene = about 3,785 mL density = about 0.867 g/mL mass toluene = 3785 mL x 0.867 g/mL = 3282 grams. moles toluene = grams/molar ...
October 4, 2010

nothing
so how does this website work?
September 23, 2010

math
If the probability that an identified hurricane will make a direct hit on a certain stretch of beach is 0.10, what are the odds in favor of a direct hit? a. 1:10 b. 1:9 c. 9:1 d. 8:1
September 18, 2010

math
what percentage is 60 of 480?
September 17, 2010

political science
Compared to the Articles of Confederation, did the US Constitution represent an increase in national power or a decrease? How so?
September 5, 2010

government
Compared to the Articles of Confederation, did the US Constitution represent an increase in national power or a decrease? How so?
September 5, 2010

Fundamentals of Cost Analysis (Economic Analysis)
What would be the present value of an item that has a salvage value of $25,000 at the end of five years? Assume a discount rate of 3.8% for an end-of-year factor. Carry calculations to four decimal places.
August 19, 2010

chemistry
dsf
July 13, 2010

home economic
Which of the following gadgets is best for making a soft-shell shape out of butter? A. A curler C. A masher B. A peeler D. A pick
July 13, 2010

socail studies
thanks
July 1, 2010

socail studies
the choices are A)written language B) child-child socialization C) vocabulary development D) assimilation into mainstream culture.
July 1, 2010

socail studies
For children who are learning English as a second language. context-embedded activities enhance?
July 1, 2010

math
If you know that the number will be prime, than you only count the prime numbers; because there are 6 prime numbers in 1-11 and only one of those is even, the answer is 1/6.
May 23, 2010

10th grade math
how to solve triangles with parrellel lines running through them!
May 19, 2010

college
one
May 19, 2010

Math
There are 8 letters, of which 4 are in the set you are interested in. That means the probability of drawing a letter from the {m,a,t,h} set is 4/8 = 1/2. Answer: 1/2
May 12, 2010

Math
slope-interpept form of the line satisfying the specified conditions: through (-15, -49) and perpendicilar to 5x+8y=-48
May 1, 2010

12th grade
distance= average speed multiplied by time taken the answer is to convert the hours to minutes which would be 5 hours and 15 secs and multiply by 70 which iz360.5
April 27, 2010

world history
what were the possitives and negatives of andrew jacksons presidency?
April 22, 2010

English
and the hamlet one, its your seccond choice, i just learned that today :)
April 22, 2010

English
use the authors first name at the begining then substitute in his last here aand there
April 22, 2010

APChemistry
LOL not blocked
April 18, 2010

APChemistry
dildo
April 18, 2010

APChemistry
LOL
April 18, 2010

human reources
Biographical information blanks are difficult for applicants to fake because?
March 30, 2010

begining algebra
One side of a triangle is three times the shortest side. The third side is 7 feet more than the shortest side. The perimeter is 62 feet. Find all three sides.
February 10, 2010

college
One side of a triangle is three times the shortest side. The third side is 7 feet more than the shortest side. The perimeter is 62 feet. Find all three sides.
February 10, 2010

8th grade
who was emily tassey and who were her kids
February 4, 2010

Crt/205
It's the Straw Man fallacy. The Catholic Church is not against condoms because of their inability to prevent disease, it is against them because of their ability to prevent pregnancy. He is correct that condoms aren't 100% effective in preventing AIDS, but he ...
January 21, 2010

chemistry help plz
limiting reactant is Bi(NO3)3, and 9.762629805 g of Bi2S3 is produced
January 8, 2010

Any Help w/5th grade math
No, that is not right. If you sell 25 brand B's you sell 50 A's. That is 75, If you sell 25 C;s, you sell 50 As. That is another 75. THat is more than 100. There is no answer to this question.
November 2, 2009

algebra
(5x3 + 3)2 = (5x3)2 + (3)2 = 25x6 + 9 Determine if Louise’s answer is correct. Explain.
October 21, 2009

morrow
parallel hierarchies
October 12, 2009

physics
sd
September 17, 2009

Statistics
sadas
September 2, 2009

sociology
three ways that american institutions have brought oppressed groups closer to the american dream
May 16, 2009

Religions
How modern civilization has impacted the spiritual lives of the indigenous peoples you explored. Are indigenous religions still practiced today? If so, how have the practices changed over time?
May 11, 2009

Goverment
Why or why not the concept of religious freedom is relevant to today's contemporary society.
April 30, 2009

Goverment
Examples of religious liberty in America has been real or is just an ideal.
April 28, 2009

college
Why and how religious freedom was guaranteed in the Bill of Rights, and why it has been difficult to achieve that ideal.
April 28, 2009

soigology
historical examples of bigotry
April 22, 2009

coding
you are a third party payer performing medical record review you notice a procedure that was not done what should you do
April 6, 2009

Challenge Problems - Math
Please help, even if you only know 1 answer. 1. The length of each side of rectangle R is an integer, and the area of R is 2009. What is the largest possible perimeter of R? 2. If i place all three operational symbols +, -, X in all possible way into the blanks if the ...
March 30, 2009

spelling
what is the positive and comparative for worst?
March 9, 2009

spelling
what is the comparative and superlative for willing?
March 9, 2009

spelling
what is the comparative and superlative for useful?
March 9, 2009

spelling
what is the comparative and superlative for troubled?
March 9, 2009

spelling
thank u
March 9, 2009

spelling
what is the comparative and suuperlative of northern?
March 9, 2009

spelling
whirlwind:breeze::downpour:???
February 19, 2009

spelling
scrub was right do you know the other one??
February 19, 2009

spelling
broom:sweep::brush:??? start with scr,spr,str,thr
February 19, 2009

spelling
scratch was the right one
February 19, 2009

spelling
scr,spr,str,thr
February 19, 2009

spelling
glue:sticks::thorns:?????
February 19, 2009

spelling
They have to begin with scr,spr,str,thr
February 19, 2009

spelling
whirlwind:breeze::downpour:???
February 19, 2009

spelling
stream
February 19, 2009

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