Saturday

September 5, 2015
Total # Posts: 1,650

**physics**

An Atwood Machine has a pulley of radius Rpulley = 0.25m, and mass Mpulley = 6.0 kg with two blocks with masses m1 = 5.0 kg, and m2 = 10.0 kg. Treat the pulley as a uniform disk. a) Find the acceleration of each block. b) Find the angular acceleration of the pulley. c) Find ...
*December 11, 2006*

**Grammar**

In the following sentence: "These beginning songs are not my favorite part of the album, but I feel that each play an important role in the album." Would "play" have to be "plays." I know that each is a singular pronoun, but are we referring to ...
*December 11, 2006*

**geometry**

What geometric postulate justifies statement: if AB is congruent to CD and CD is congruent to EF, then AB is congruent to EF. Two geometric objects that are congruent to the same third object are congruent to each other.
*December 7, 2006*

**Science - Physics**

When a projectile is fired horizontally, which of the components of its motion is (A) motion at constatnt speed (B) uniformly accelerated motion (C) If the initial velocity of the projectile is increased, what effect will this have on the time it takes the projectile to fall ...
*December 6, 2006*

**physics**

A student sits on a freely rotating stool holding two weights, each of which has a mass of 3.00 kg. When his arms are extended horizontally, the weights are 1.00 m from the axis of rotation and he rotates with an angular speed of 0.750 rad/s. The moment of inertia of the ...
*December 5, 2006*

**math, calculus**

What is the antiderivative of the square root of the quantity (1+x^2) http://torte.cs.berkeley.edu:8010/tilu This lookup is very good.
*November 27, 2006*

**math, calculus**

if f(1)=12 and f' is continuous, what is the value of f(4)? integral from 1 to 4 of f'(x)dx = 17 IF the integral of f'(x) dx from 1 to 4 is 17, as you say, then the function f(x), which is the integral with an arbitrary constant, changes by 17 from 1 to 4. Then the...
*November 27, 2006*

**math, calculus**

find the derivative of the function y= integral from square root of x, to x cubed of (square root t * sin(t))dt
*November 27, 2006*

**math, calculus**

Use the MVT to prove: absolute value of (sin(a)-sin(b)) is less than or equal to the absolute value of (a-b) for all a,b
*November 27, 2006*

**physics**

A glider of mass m1 = 10.0 kg initially moving towards the right at a speed of v1i = 2.00 m/s on a frictionless airtrack collides with a spring attached to a second glider of mass m2 = 4.0 kg initially moving toward the left with a speed of v2i = 5.00 m/s. The spring constant ...
*November 26, 2006*

**science**

why does sedimentaray rock form in layers It was deopsited in layers. Please read: http://en.wikipedia.org/wiki/Sedimentary_rock
*November 20, 2006*

**Math-approximation with fractions:7th grade math**

i need help 2
*November 19, 2006*

**acids and alkalis**

Acid: Vinegar Mayo Lemon juice Coke Aspirin Car battery Alkali: Oven cleaner soap cleaning fluid Baking soda Toothpaste Mouth wash
*November 4, 2006*

**physics**

if the height of a playground slide is kept constant, will the length of the slide or the presence of bumps make any difference in the final speed of kids playing on it if a) the slide is frictionless b) the slide has kinetic friction? a) if the slide is frictionless, length ...
*October 30, 2006*

**physics**

if a rocket engine delivers a constant thrust, does it deliver more power as the rocket speeds up force = mass*(acceleration) if the rocket accelerates, the force will increase wow,uh constant thrust means it is delivering constant power. the kenetic potential of the rocket ...
*October 30, 2006*

**Pigskin Geography**

I need help with pigskin geography week #4 number 12. Thanx :)
*October 30, 2006*

**Pigskin Geography**

My question is for week 4 #12. the question is " September 23, 18-6 is the date Lewis and Clark returned to the city near where the wxbedition began. Which host team might salute therir feat at a half-time observance?
*October 30, 2006*

**Pigskin Geography**

Help with Week 4 number 12. :)
*October 30, 2006*

**science**

why does a egg lose weight after being in corn syrup overnight? Which way will fluid travel in osmosis? IS THERE ANY NEW PROECTS
*October 30, 2006*

**Life Science**

where is a good site, book,or encyclopedia that you know of and what is it called?I need to know so I can finish my poster of ocean intertidal zone biome.Plus its due in two days!!! you cam try w i k i p e d i a . c o m
*October 30, 2006*

**science**

3 meters
*October 29, 2006*

**science**

why are stars shaped in a star form All stars are spheres. Their own gravity forces then to take that shape
*October 23, 2006*

**English passage interpretation**

I see irony in this passage, because the literal words of the author do no match up with the overall feeling of the passage. I lean more to the idea that the author's purpose it to show the wild,animalistic nature of the swamp. I agree that considering the author is a ...
*October 21, 2006*

**Neon**

i need a slogan for neon *stupid science teacher*
*October 16, 2006*

**Chemistry**

Iron ore consists mainly of iron III oxide. When iron III oxide is heated with an excess of coke(carbon), iron metal and carbon monoxide are produced. Assume that even if an excess of coke is not present that the reaction proceeds as described. A)write a balanced equation for ...
*October 15, 2006*

**AP chem!!!**

Iron ore consists mainly of iron III oxide. When iron III oxide is heated with an excess of coke(carbon), iron metal and carbon monoxide are produced. Assume that even if an excess of coke is not present that the reaction proceeds as described. A)write a balanced equation for ...
*October 15, 2006*

**Social Studies**

Who were the Sioux and what did they do in their everyday lives? Since this is not my area of expertise, I searched Google under the key words "Sioux Indians" to get these possible sources: http://www.newadvent.org/cathen/14017a.htm (Broken Link Removed) http://www....
*October 10, 2006*

**word unscramble**

ARIOTECP and its not Operatic or Aporetic
*September 28, 2006*

**eth**

What information about race and ethnicity in the United States has helped me better understand or relate to specific minority groups? Have you learned something new about your own cultural history? I am sure the teacher wants YOUR opinion and not mine. So just think about how ...
*September 24, 2006*

**Government**

Has the Supreme Court acted legitimately in creating and interpreting the right of privacy? Use Cas law to jusify. Is the Freedom of the Press still a right worth preserving? Why or Why Not? Once you have posted what YOU think about these questions, someone here will be able ...
*September 23, 2006*

**another algebra word problem**

okay guys, just one more word problem. and i don't think this one has any typos in it: The perimeter of a rectangle is 27 cm and its area is 35 square centimeters. Find the length and the wide of the rectangle. i just need help getting it started... Ok P=27cm where P is ...
*September 12, 2006*

**algebra**

a chemist mixes an 11% alchohol solution with an 8% alchohol solutoins. How many milliliters of each solution should he use to make a 600ml solution that is 8% alchohol solution? Why wouldn't we just use 600ml of the 8% solution to begin with? So 0ml of the 11% and 600ml ...
*September 12, 2006*

**Stoichiometry problem**

how many moles of aluminum chromate Al2 (CrO4)3 in a sample of aluminum chromate that contains 6.20 x 10^14 atoms of chromium?
*September 9, 2006*

**Ethics**

no yes
*September 6, 2006*

**Math**

I don't even know where to begin on this problem... The function f(x) is an unshifted exponential function which goes through the oints (2,5) (3,4). a)What is the equation for f(x)? b)write f(10) and f(100). If it's an exponential function then we know f(x)=a^x. The ...
*August 31, 2006*

**Math**

I just don't understand this question: h(t)=A*b^x h(3)=4 h(5)=40 Solve for b Would you plug 3 into the x and set it equal to 4? (4=A*b^3) How would you solve for that because in the next question they go on to ask you to solve for A using the b you found... Almost looks ...
*August 30, 2006*

**Math**

Can someone walk me through these becuase I'm just not getting it.... Let f(x)= 3 x 4^x. A.) 16f(x)= f(x+2) B.) f(x)= f(x-1) The quickest way to answer this question is to try different test values for x. My favorite was the number 13. Set x to 13, and see if A and/or B ...
*August 29, 2006*

**Math**

How would you solve for A 5 x 3^(x+2)= A x 3^(x) Please help me, I have loads of problems like this on my homework assignment and I just can't seem to figure it out Well, we could divide both sides by 3^x couldn't we? We know it's never 0, so there's no ...
*August 28, 2006*

**Problem Solving Math**

1+3+5+...+2009
*August 23, 2006*

**mathh (unit rate)**

Trave 250 mi in h need the unite rate for each situation
*August 22, 2006*

**orientalism of muslim and arab american**

I believe since we are all here from U of P then we should have this link on our homepages.lol By the way, this assignment really sucks.lol Im still clueless.
*August 6, 2006*

**quote meaning**

this quote is a philosophical quote about existence, but that's all i know!! can someone please help me by giving it a meaning or by analyzing it? "time is the substance from which i am made. time is a river which carries me along, but i am the river; it is a tiger ...
*July 27, 2006*

**sociology**

Im in the same class as well ETH125. you think that they woul dchange so that no one would copy papers. as in com classes they are easy, well that is if you lik etoy write my other class in SCI275 good luck in finding teh answers i know that i got mine. LOL
*July 20, 2006*

**eth125**

decribe other measurements sociologists use to calculate prejudice
*July 20, 2006*

**writing**

How would you encourage a reluctant peer reviewer? What is your thinking on this? The question has been asked over the past few weeks several times, with good answers. I, and others, will be happy to critique your thinking. Please go to the site listed below. Read it carefully...
*June 22, 2006*

**math**

$340,000 in budget for 210 employees inyr 1988, in1989 there were 267 employees with same budget. What should've been budget for 1989 and what was % of change from 1988 to 1989? Show me the formula for the answer Nicole: The way this works is that you do as much of a ...
*June 11, 2006*

**math**

27 letters in 1988, 18 letters in 1989 what is % of change? *need to know how you arrive at the answer Didide the change (-9) by the original value (27), and convert that fraction to a percentage. I'll be glad to critique your answer.
*June 11, 2006*

**math**

if 6% of a number is 14, what is 13% of the number Let X = the number 0.06X = 14 Solve for X. Then 0.13X = ?? Post your work if you want us to check the answers.
*June 11, 2006*

**Algebra PLEASE HELP!**

If y varies directly as X and X=88 when Y= 110, find X whaen Y=70 Set up a proportion: 88/110 = X/70. solve for X.
*June 11, 2006*

**P.E.**

i live in california and it gets really hot around 105 lately. Can a pe teacher make us run is this kind of heat??? The PE teacher has little control over the temperature in California, but she can control how you get fit...and the teacher is trained on how to do it safely. no...
*August 29, 2005*