Tuesday

September 1, 2015
Total # Posts: 540

**physics**

what is the formula for finding the decrease in kenetic energy
*December 21, 2007*

**physics!! plz answer me!**

In a collision between two soccer balls, momentum is conserved. Is momentum conserved for each soccer ball? explian... plz =)
*December 10, 2007*

**physics!! plz answer me!**

A 0.15 kg baseball moving at +26 m/s is slowed to a stop by a catcher who exerts a constant force of -390 N. How long does it take this force to stop the ball? How far does the ball travel before stopping? plz plz plz help!!
*December 10, 2007*

**physics!!**

if u jump onto the floor, are you more likely to be hurt if your legs are relaxed or if your legs are stiff and your knees are locked? explain....plz help =)
*December 10, 2007*

**Greens Theorem**

Can someone show me step by step how to work this problem out please. Let C be the triangle with vertices (0,0), (1,0), and (1,2). Find the following line integral by two methods, directly and using greens theorem. 2xy^2dx + yx^2dy Thanks!!!
*December 10, 2007*

**Calculus 3**

ok so the final answer is 1/2 e^y^2????
*December 10, 2007*

**physics**

A 20 kg child on roller skates, initially at rest, rolls 4 m down an incline at an angle of 30 degrees with the horizontal. If there is no friction between incline and skates, what is the kenetic energy of the child at the bottom of the incline? (g= 9.81 m/s^2)
*December 5, 2007*

**science**

Any advice on how to figure out solubillty of Agno3?
*October 27, 2007*

**Ethics**

where can i get a big list and descirptions of scientists who were involved with scientific fraud? i tried google without much success...
*October 11, 2007*

**physics**

thank you so much!! it was so frustrating to get the wrong answer after wrong answer..
*October 10, 2007*

**physics**

i know how to do it, i keep getting the wrong answer!! a bob of mass 4.00 kg is suspended from a fixed point by a massless string of length 1.50 m. The bob moves in a horizontal circle with the string always making an angle theta=22 from the vertical. what is the speed of the ...
*October 10, 2007*

**physics**

a car is travelling along a cruve having radius of curvature of 80.0 m, banked at an angle of theta=30. The coeff of static friction of ice is 0.05. What is: a) the slowest speed the car can negotiate the banked curve with? b) what is the fastest speed? first of all, im having...
*October 9, 2007*

**Math**

her's my word problem: george is twelve years older than Jeannie. The sum of their ages in 5 years is 50. How odl is jeannie now?
*September 26, 2007*

**Physics**

I dont know
*September 21, 2007*

**physics**

You drop a stone from the top of a cliff that is 20 meters tall. Compute how long it will take for the stone to reach the bottom using various different choices for your coordinate system.
*September 7, 2007*

**math**

what is the radius of a circle using center and radius
*September 5, 2007*

**mat117**

Find all numbers for which the rational expression is not defined. 24/-8y
*June 26, 2007*

**physiology**

Why do the control mechanisms have several intergation centers? Julia, did you mean integration or interrogation? The control systems are not simple, they are multilayered, multistepped, and operate by releasing hormones, enzymes, and bioactive substances sequentially in time ...
*June 3, 2007*

**Math**

Why do we need to learn topography? Topographic maps show the hills and valleys. By learning to read a topographic map, you can tell whether a hill is really steep or has a very gradual grade. Check this site for more information. http://erg.usgs.gov/isb/pubs/booklets/symbols/
*May 24, 2007*

**Math**

I need to know for a project I am doing in math right now, where I can find the reason in life why we learn about Networking/Topograph. I've looked up definitions and the people who invented equations for it but we need to answer why we learn it in school Electrical ...
*May 23, 2007*

**english**

unscrabble words giuthlns rignps http://www.ssynth.co.uk/~gay/anagram.html http://wordsmith.org/anagram/ http://www.unscramble.net
*April 30, 2007*

**Math**

180 ml of a mixture of water and alcohol with 90% alcohol concentration is mixed with 70 ml of pure water. what is the alcohol concentration of the new mixture? Do the following: 1) Find out how many ml of alcohol was in the first mixture. (What is 90% of 180?) 2) Take that ...
*April 21, 2007*

**chemistry**

I posted this question on April 16 and received lots of help..but need more.. thanks 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 ...
*April 18, 2007*

**Chemistry**

I posted this question on Thursday April 12 and received some help..but need more.. thanks 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...
*April 16, 2007*

**URGENT!! PLEASE Calc**

Verify that the function satisfies the three hypotheses of Rolle's Theorem on the given interval. Then find all numbers "c" that satisfy the conclusion of Rolle's Theorem. f(x)=sin4pix , [-1/2,1/2] Well according to Rolle's Theorem, it has to be ...
*April 14, 2007*

**math**

Compute delta(y) and dy for the given values of x and dx=delta(x) y=x^2 , x=8 , delta(x)=0.5 Delta(y)= ??? dy = ??? I got dy=8 by doing: dy= (f prime of x)dx dy=2xdx dy=2xdelta(x) dy=2*8*0.5 dy=8 but I have not clue how to find delta(y) please help! deltay = y(x+deltax)- y(x...
*April 14, 2007*

**calc**

Verify that the function satisfies the three hypotheses of Rolle's Theorem on the given interval. Then find all numbers "c" that satisfy the conclusion of Rolle's Theorem. f(x)=sin4pix , [-1/2,1/2] Well according to Rolle's Theorem, it has to be ...
*April 14, 2007*

**mathematics**

A car braked with a constant deceleration of 45ft/s^2 producing skid marks measuring 55 ft before coming to a stop. How fast was the car traveling when the brakes were first applied? Please round the answer to the nearest hundredth. Vo= ft/s Vintial^2 - Vfinal^2= -2*...
*April 14, 2007*

**Chemistry**

I posted this question a bit ago and received some help..but need more.. thanks 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 ...
*April 12, 2007*

**Chemistry**

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...
*March 29, 2007*

**pre-algebra**

Rewrite the equation so the variable is alone. Solve to find the value of the variable. 42=-2h Divide both sides by 2. Then change the signs of both sides. That will provide the answer. Possibly in 1 step: Divide by -ve 2
*March 15, 2007*

**pre-algebra**

Solve the equation- w(-2)=14 m-7= -3 -3h= -42 Here are some basic rules you need to follow. Get all your numerical terms on one side of the equation by doing the same process on both sides of the equation. w(-2) /-2 = 14/(-2) The -2 terms on the left cancel each other out to ...
*March 7, 2007*

**Social Studies**

Why did Thutmose III try to get rid of everything that had to do with Queen Hatshepsut? Because he envied her and hated her and stuff, and because he wanted to be the only ruler, not to rule aside Queen Hatshepsut. I looked it up in a book. You should too! Check this site. ...
*January 30, 2007*

**spelling**

i agree, it's spry.
*January 16, 2007*

**calculus**

Yes, that is correct. After that, plug in the numbers and you get an answer of dV=9.630.
*January 8, 2007*

**alphabetical order**

yo0ur a noob
*January 8, 2007*

**math**

3x+y=-4 x=3-3y y=2x x+2y=-4 You have written four equations in two unknowns. There is no x,y combination that satisfies all of them. What is your question?
*January 7, 2007*

**Rewrite question**

The minister joined the couple together as man and wife. What is your question, please? ?? The minister joined the couple together as man and wife The minister joined the couple together as man and wife. The minister joined the couple together as man and wife.
*November 4, 2006*

**Attention Smart People**

Where can i find as much info as possible about Forensics? Thanx in advance Whenever you are searching for something online, you have to be prepared for the possibility that none of it may be online. Or some may be, and some may not. In addition to searching on the Internet, ...
*October 19, 2006*

**Brain**

I don't need an answer to this statement. I just want to know what your reactions are. All I want is anything that came to your mind. I.e. What questions came to your mind? Do you guys have any ideas of why this might be occurring? I just want thoughts!!! A normal part of ...
*October 2, 2006*