Science & Mathematics - 21 July 2007

2007-07-21 18:18:59 · 11 answers · asked by Bill W 【ツ】 6 in Weather

v=u+at which means ds/dt=u+at. Then integrate both sides and s=ut+0.5at^2+c where c is a constant but why is c always left out when we have a reference point?

Side question also related to projectile motion:
How does air resistance affect the range of the motion?
How does the angle change ,compared to the angle without air resistance to reach a point, when there is air resistance to reach the similiar point?

2007-07-21 18:17:26 · 7 answers · asked by Anonymous in Physics

How does one get y^2 - 2y = x^3 + 2x^2 + 2x + 3 to turn into: y = 1+- sqrt(x^3 + 2x^2 + 2x +4) ? Thanks for the help.

2007-07-21 18:16:15 · 2 answers · asked by Charlie4590 2 in Mathematics

Find the area enclosed by the curves y=x(x-1) and y=x(2-x)

2007-07-21 18:07:08 · 2 answers · asked by th3one101 2 in Mathematics

A woman at a point A on the shore of the circular lake wants to arrive at the point C on the lake diametrically opposite A. She first rows a boat from A to B at a rate of 4 mph and then jogs from B to C at a rate of 8 mph.
The eqn for the time she takes to get from A to C assuming the lake is d miles in diameter is (d/8) (2cos theta + theta) hrs

Questn: If the lake is 4 miles in diameter, what is the least time she can take in getting from A to C via B.
what does it mean by "via B", so why cant it be 1

2007-07-21 17:57:40 · 3 answers · asked by sdt3 1 in Mathematics

2007-07-21 17:34:58 · 4 answers · asked by Anonymous in Mathematics

Ok i get Kinda Nervous (not nessicarly Very Scared!) from Severe Thunderstorms... But not that big on tornadoes dont get me wrong if one happend i would be pushing people out of the way to find shelter and pissing my pants while doing it... (im 13 btw) and i live in florida so they get real bad like today there was a Like state wide very severe thunderstorm..... But what is wrong with me? if anything? im more nervous of Lightning and Loud Thunder.... So Whats wrong?

Answers???
So My parents think its kinda weird because usually its the other way around like people are very affraid of tornado's and not so much just lightning

Ive been in a tornado before F-2 and a like F-0-1 in a trailer park when i was like 5

2007-07-21 17:34:17 · 6 answers · asked by Robert 2 in Weather

area code is for New York state

2007-07-21 17:30:20 · 6 answers · asked by moosie111 1 in Geography

i know why, just is kinda confusing

2007-07-21 17:27:55 · 9 answers · asked by Anonymous in Astronomy & Space

2007-07-21 17:26:05 · 5 answers · asked by Anonymous in Mathematics

I was reading about a baby that has shaken baby syndrome and his j tube was clogged. What does that mean? Is it hard to get it un-clogged?

2007-07-21 17:24:14 · 2 answers · asked by Anonymous in Medicine

Let .5(a+1/a) = -( 2+x) , .5(b+1/b) = -2. I need to to express the following in terms of 'x'. " .5[ (a+b)/(1+ab) + (1+ab)/(a+b) ] "

you are a super genius if you get this.

2007-07-21 17:22:14 · 2 answers · asked by iliketohide 2 in Mathematics

This question is from physics .

2007-07-21 17:02:36 · 2 answers · asked by ashok g 1 in Chemistry

2007-07-21 17:02:34 · 5 answers · asked by Anonymous in Astronomy & Space

my friends and i cant get these four for some reason!!
please help us out! =[
thank you!!

A computer circuit board has an area of 62. square inches. What is its area in square centimeters?


A cylinder has a radius of 5 inches and a height of 24 inches. What is the volume of the cylinder in cubic decimeters?


A carpet is being sold for $26.90 per square yard. What is the cost per square meter?


A computer hard disk can record 95. kilobytes of information per second. How many minutes will it take to record a digitalized piece of music occupying 2.2 megabytes?

2007-07-21 17:00:51 · 3 answers · asked by Anonymous in Mathematics

2007-07-21 16:48:48 · 4 answers · asked by jrseeg1rl 2 in Mathematics

I need help solving something like:

x=y-3
5x+3y=1

appreciate it.

2007-07-21 16:37:34 · 8 answers · asked by agent K13007 2 in Mathematics

i'm not asking for the answers. i just need some help remembering the basic concept of ax^2 + bx + c or whatever :) i forgot everything over the summer.

2007-07-21 16:32:01 · 4 answers · asked by mmholdford 2 in Mathematics

2007-07-21 16:32:00 · 1 answers · asked by Melandi 2 in Earth Sciences & Geology

The elements that are not founded in nature are mostly Inner transition metals and Transition metals, but how could there be such an element when they have to be compose with two or more substance on earth if they are made by a person. Or do those elements are about spectrum, but light is not a metal.
What would be the use of the elements that are not founded in nature? Are they useful because they have the most electrons in each of their energy levels? Does that mean they are very active? What are the use of making new hard nuclei?

2007-07-21 16:28:11 · 3 answers · asked by display name 2 in Engineering

why using high voltage transmission can reduced the resistance?please give me a clear explanation...

2007-07-21 16:26:58 · 3 answers · asked by Daireen 2 in Physics

2007-07-21 16:23:16 · 1 answers · asked by bbs245 1 in Geography

http://www.youtube.com/watch?v=yCfDRvDWid0
This video makes you wonder. Do you think that this is possible?

2007-07-21 16:23:10 · 10 answers · asked by Big L.A. 4 in Astronomy & Space

2007-07-21 16:20:48 · 12 answers · asked by Anonymous in Earth Sciences & Geology

What is dewpoint and what is humidity? The weatherman says in our area the temp is 87 degrees F. and the humidity is 55% and the dewpoint is 73 degrees. All I know is it is hard to breathe outside. Ick..

2007-07-21 16:18:36 · 6 answers · asked by rinda_and_henry 1 in Weather

2007-07-21 16:11:39 · 8 answers · asked by soulestada 4 in Zoology

1. give examples of optical instruments that uses a convex or converging lens?
2. how do lenses change the direction of light rays and form images?

2007-07-21 16:07:16 · 3 answers · asked by beibi anghell 1 in Physics

2007-07-21 16:06:28 · 9 answers · asked by ascloud@sbcglobal.net 3 in Engineering

Why don't we eventually lose our atmosphere to space?

As we get closer to space the gravitational forces keeping the atmosphere from going into space must be negatively balanced by the diffusion of air into space (which has no atmosphere).

Although the process may be slow, over eons shouldn't we have by now totally lost our atmosphere?

2007-07-21 16:06:16 · 7 answers · asked by nathan_strahl 1 in Astronomy & Space

(the typical lawn swing w/awning had a hive between the covered foam pad and the canvas the foam sits on. There was a small chew mark on the back (this is a new swing), and I am wondering if wasps have gone inside to the foam. Have you ever had this problem. Also, what to do, many still want to hang out after we soaked the hive w/water & crushed it.

2007-07-21 16:05:47 · 2 answers · asked by Anonymous in Zoology