Science & Mathematics - 9 September 2007

Ok, I've been working on this and I am stumped. I don't necessarily want the answer, but a point in the right direction:

A free falling object takes 1.50 s to travel the last 29.0 m before it hits the ground. From what height above the ground did it fall [no wind resistance]?

2007-09-09 09:01:10 · 4 answers · asked by hyped83 2 in Physics

Hi, could someone help me with the following:

Which reaction rates are the highest: initial rate, average rate, final rate, or instantaneous rate and why?

Thanks!

2007-09-09 08:57:51 · 2 answers · asked by James 1 in Chemistry

What formula do you use?

2007-09-09 08:55:13 · 2 answers · asked by c_eva02 2 in Mathematics

45X72X132
I got: 427,680 so is the answer "430 X 10^3"?

2007-09-09 08:54:09 · 8 answers · asked by Anonymous in Mathematics

2007-09-09 08:51:22 · 3 answers · asked by matt_sorrentino 1 in Engineering

If 2ax - 5x = 2, then x is equivalent to...

[1] (2 + 5a)/2a
[2] 1/(a - 5)
[3] 2(2a - 5)
[4] 7 - 2a

An answer with an explanation would be much appreciated. Thanks! :)

2007-09-09 08:51:09 · 2 answers · asked by Anonymous in Mathematics

i hope there is & i became a paranormal investigator to try & discover some answers, but what do you personally believe?

2007-09-09 08:47:15 · 30 answers · asked by Anonymous in Paranormal Phenomena

I am working on a problem that requires me to integrate x+1/x^2+1. I've used a CAS to find a solution: 1/2ln(x^2+1)+arctan(x), but I would like to know how to get to that answer.

Could anyone explain to me how to find an antiderivative for this problem?

2007-09-09 08:46:41 · 2 answers · asked by Anonymous in Mathematics

2007-09-09 08:45:32 · 2 answers · asked by ? 1 in Mathematics

(Ha, yah, I should know this, but I'm tired, it's the weekend and I can't find it in my book....=( Thanks to all who answer in advance!) If this helps, the question on my paper was, 'In which layer does erosion take place?' (The crust.) And then the next part, (The part I need help with.) is 'Why?'

2007-09-09 08:45:25 · 2 answers · asked by PsychicPirateHobbit 3 in Earth Sciences & Geology

Graph a line through (-2, 2) that is parallel to a line whose slope is -1?

I know how to graph, but I'm not sure on how to do the math.

2007-09-09 08:42:56 · 1 answers · asked by hintzruby 1 in Mathematics

just wondering. =] I'm having a hard time deciding for a project im doing in Biology. Heh.

2007-09-09 08:42:44 · 4 answers · asked by Anonymous in Biology

If so, could you give me an example and how to seperate it?

Thank you =]

2007-09-09 08:36:58 · 6 answers · asked by Kendra 2 in Chemistry

I have recently become interested in Geology, particularly the study of rocks. I understand the 3 basic rock types. What I want to know is how does one identify a rock type (Igneous, Metamorphic, Sedimentary) and then the rock (i.e. Granite, limestone, Sandstone, etc.) simply by looking at them?

2007-09-09 08:29:40 · 6 answers · asked by Tim Buck 5 in Earth Sciences & Geology

I am often electrically shocked when I touch metal. Of course, i dont mean serious injury, but just small sparks that occur from time to time that everyone has probably encountered. It happens most to me when I wear flip-flops.

So what are some things I could do to prevent these small shocks?

2007-09-09 08:29:37 · 13 answers · asked by Em 4 in Other - Science

integrate: sin(x^(1/3))dx

thx

2007-09-09 08:25:34 · 1 answers · asked by the man 2 in Mathematics

Runner A is initially 6.2 Km west of a flagpole and is running with a constant velocity of 4.0 km/h due east. Runner B is initally 2.4 km east of the flagpole and is running with a constant velocity of 2.0 km/h due west. What will be the distance of the two runners from the flagpole when their paths cross?

2007-09-09 08:24:57 · 4 answers · asked by Anonymous in Physics

2007-09-09 08:24:31 · 3 answers · asked by monica n 1 in Mathematics

length of rope is not known. you are having only the rope, a matchbox and a pair of scissors.

2007-09-09 08:23:22 · 2 answers · asked by Anonymous in Physics

karma's age is 2 years less than three eighths of her father's age. If Karma is 13 years old, how old is her father?

2007-09-09 08:23:19 · 6 answers · asked by monica n 1 in Mathematics

2007-09-09 08:17:48 · 7 answers · asked by monica n 1 in Mathematics

2007-09-09 08:17:36 · 4 answers · asked by maria 1 in Mathematics

1. What is the x intercept of Y=x^2+5x+2

2. Is the following trinomial a perfect square and Why?
x^2+18x+81

Thank for all of your help.

2007-09-09 08:17:30 · 3 answers · asked by Anonymous in Mathematics

2007-09-09 08:17:11 · 2 answers · asked by Seanyy 3 in Physics

2007-09-09 08:13:51 · 9 answers · asked by eric j 1 in Astronomy & Space

the part?

2007-09-09 08:13:37 · 1 answers · asked by Terri L 2 in Biology

I am having trouble tackling this problem:
"A car makes a 60.0-km trip with an average velocity of 40.0 km/h in a direction due north. The trip consists of three parts. The car moves with a constant velocity of 25 km/h due north for the first 15 km and 62 km/h due north for the next 32 km. With what constant velocity (magnitude and direction) does the car travel for the last 13-km segment of the trip?"

Here's what I've done so far:
40 km/h =(25 km/h + 62 km/h + x) / 3

120 km/h = 25 km/h + 62 km/h +x

120 km/h = 87 km/h + x
33 km/h = x
^not even sure if thats the correct way to do it. any help will be highly appreciated!!!!!

2007-09-09 08:13:02 · 1 answers · asked by PodCaster 1 in Physics

2007-09-09 08:09:35 · 5 answers · asked by JFK fan--(Hug Brigade) 4 in Mathematics

I have a 20cl full bottle of vodka with has "37.5% vol" on the label. how many grams of alcohol does the bottle have?

also,is 20cl = 20mlitres?

2007-09-09 08:07:56 · 2 answers · asked by cccc 1 in Physics

2007-09-09 08:06:33 · 4 answers · asked by baximus_rex 2 in Engineering