Science & Mathematics - 30 August 2007

i have the graph of the derivative of f

the graph seems to make W shape with another loop

it seems to have 4 roots that are on the positive side of the x axis

all of these roots are in order starting with the first nearest to the origin...

the first root is just the line going down from above the x axis to below the x axis.

the second root is the line looping back up from below the x axis but it only touches the x axis and loops back down.... however, in this case, the touch to the x axis is not smooth but is more like a "kink", sharp pointy...

the third root is just the line looping back up again and this time going from the bottom of the x axis, through the x axis to the top of the x axis...

the fourth root is just the line looping back down from the tope of the x axis but smoothly looping back up just after barely touching the x axis... so this time there was no kink or sharpness... just plain smooth loop...

see additional details below...

2007-08-30 10:29:47 · 2 answers · asked by quizzical 1 in Mathematics

A ball is thrown upward from the ground with an initial speed of 35 m/s; at the same instant, another ball is dropped from a building 10 m high. After how long will the balls be at the same height?

2007-08-30 10:25:47 · 1 answers · asked by Anonymous in Physics

x=24+xy:x=-12
How do you solve?

2007-08-30 10:23:54 · 8 answers · asked by Anonymous in Mathematics

2007-08-30 10:20:28 · 3 answers · asked by Anonymous in Weather

Also, does anyone know what effect air pressure would have on electrical sparks/ lightning?

2007-08-30 10:20:06 · 3 answers · asked by Chris 1 in Weather

2007-08-30 10:19:45 · 17 answers · asked by Anonymous in Mathematics

Are you a Doctor and if you are what type ?

2007-08-30 10:19:27 · 1 answers · asked by Anonymous in Medicine

Meaning they discovered a way to breathe the air, grow plants, retrieve energy from the sun, and even discovered drinking water under the surface, etc.

2007-08-30 10:18:22 · 11 answers · asked by Tony M 1 in Astronomy & Space

I read where people who are against abortion say "Religion didn't decide when life began, science did ." . The point was that science determined that life begins when a fetus' heart starts beating, etc, but that was years ago, and I'm vague on the details . I know a fetus' heart doesn't start beating until a long time after conception . Apparently, biologists are looking for a series of bodily functions when they're trying to define life in a fetus . What kind of bodily functions are they looking for ? When DOES science say life begins ?

2007-08-30 10:17:14 · 4 answers · asked by I_hate_being_single 3 in Biology

Solve this:
According to the rule of thumb, every five seconds a lightning flash and the following thunder give the distance of the storm in miles.
Assuming that the flash of light arrices in essentailly no time at all estimate the speed of sound in m/s from the rule.

Show work if possible, thanks.

2007-08-30 10:07:47 · 4 answers · asked by Anonymous in Mathematics

Simplify. Assume x represents a positive number sqrt 45x^4

2007-08-30 10:07:12 · 6 answers · asked by vadataborn 2 in Mathematics

Dus any1 kno an everyday object that weighs 1 kilogram

2007-08-30 10:06:15 · 8 answers · asked by Anonymous in Mathematics

please
please help

2007-08-30 10:05:55 · 5 answers · asked by Anonymous in Chemistry

Assuming that such an equation results in a precipitate can there be only be one precipitate produced, or sometimes do such equations result in more than one precipitate being produced?

2007-08-30 10:04:46 · 3 answers · asked by Gideon 1 in Chemistry

2007-08-30 10:03:48 · 25 answers · asked by ckdwebster 1 in Mathematics

I am a substitute teacher, and I am covering a trig class on Friday. The teacher of this class is in the hospital and she didnt leave any work. I found the questions in a book, but there a no answers.

(1) Given the angle a and the radius r, to find the length of the subtending arc.
(a) a=0degrees 17 minutes, 48 seconds, r= 6.2935.

(b) a=121 degrees 6 minutes, 18 seconds, r= 0.2163

2.
Given the length of the arc L and the radius R, to find the angle subtended at the center.
(a) L=.16296, R=12.587.

(b) L=1.3672, R= 1.2978.

3.

Given the length of the arc L and the angle A which it subtends at the center, to find the radius.

(a) a= 0 degrees, 44 minutes, 30 seconds, L= .032592.

(b) a= 60 degrees, 21 minutes, 6 seconds, L=.4572.

4.A railroad curve forms a circular arc of 9 degrees, 36.7 minutes, the radius to the center line of the track being 2100 feet. If the gauge is 5 feet, find the difference in length of the two rails to the nearest half-inch.

Thank u

2007-08-30 09:56:57 · 6 answers · asked by brownboy0627 2 in Mathematics

can't get this ones!!! I think the answers are 1.45x10^39 0.445 and 17.125..... but why_ please help!!

∫ [0 to 1 ] (1-√x)^50 dx


∫ [0 to 4] dx/((1+√x)^3)

∫ [1 to 64] cubit root of X / ( 2 + cubic root of (X^2)) dx

2007-08-30 09:52:58 · 2 answers · asked by Carrera 2 in Mathematics

Could you please explain how you come to an answer with the following problem:

(A) 2/3 + 5/6 + 11/12 and

(B) 2 3/4 + 1 1/5

Thank you so much for your help! I'm stuck and my son and I are going nuts trying to figure this out.

2007-08-30 09:50:40 · 8 answers · asked by Anonymous in Mathematics

1. x^2/ x^2-25 plus 7x+10/x^2-25

2. 3x+5/ x+3 minus x-1/x+3

3. 2x/x-3 minus 6/x-3

4. 2x+1/x-3 plus x+2/3-x

5. 2x+1/3 plus -x+2/3

6. 4-x/x-9 minus 3x-8/9-x

7. 2/x minus 1/x = x/ 3x+10

8. x/8 = 1/ x+2

9. x= 5/ 6-x

10. 8/ y-3 = 6/y+4

2007-08-30 09:46:30 · 4 answers · asked by kiss k 1 in Mathematics

2007-08-30 09:45:38 · 1 answers · asked by nisha10mabry 3 in Mathematics

when autum starts when it ends (does it rain a lot or is it just windy,is this season bad for hair like winter)

when winter starts when it ends

when summer starts when it ends

and when spring starts and when it ends 9is it sunny in spring or does it rain a lot)

i've always wondereded..thanking you in advance

2007-08-30 09:44:57 · 7 answers · asked by pumakelmusa 2 in Weather

could you show me how to work it

2007-08-30 09:43:50 · 2 answers · asked by nisha10mabry 3 in Mathematics

could you show me how to work it

2007-08-30 09:42:12 · 2 answers · asked by nisha10mabry 3 in Mathematics

I mean, if someone had a cellphone, could it be always on and never need a charge, just run off of electricity from satellite?

2007-08-30 09:42:00 · 6 answers · asked by Anonymous in Engineering

The problem is 2x+y=80. idk if i need to solve for x or y.

2007-08-30 09:38:58 · 3 answers · asked by Lauren 2 in Mathematics

Seems like McDonalds are everywhere, if you live a long distance from any McDonalds, doesn't need to be 100 miles
let's see who goes the longest distance for a Big Mac!

2007-08-30 09:34:56 · 5 answers · asked by Francis R 1 in Geography

2007-08-30 09:33:33 · 2 answers · asked by shar9950 1 in Engineering

Where can I find a map made in the middle ages?

2007-08-30 09:30:23 · 4 answers · asked by Anonymous in Geography

Can someone please help me????

2007-08-30 09:29:46 · 6 answers · asked by ladyb_from_gridlock 1 in Biology

I'm doing a science fair project , in which i plan to test how different acidities of water will effect the lifespan of triops (these little aquatic creatures). What kind of acid should i use? (and nothing like coke, or orange juice, or battery acid that will kill them immediately)

2007-08-30 09:29:10 · 5 answers · asked by swtpeach725 3 in Chemistry