Science & Mathematics - 13 December 2007

2007-12-13 09:20:17 · 3 answers · asked by CS 1 in Mathematics

if you can do that, how do i do these three, as well??

2. 27^(5/3)
3. 16^(-1/4)


please show all these steps, i need to learn!
find x
5^x = 1 / 125

2007-12-13 09:15:20 · 4 answers · asked by Anonymous in Mathematics

1
_ x + 7 = 7
3

2007-12-13 09:15:11 · 10 answers · asked by =smokeL 1 in Mathematics

A manufacturer of corrugated metal roofing wants to produce panels that are 52 inches wide and 4 inches thick by processing flat sheets of metal into the shape shown above

The profile of the roofing takes the shape of a sine wave. If x = 0, y = 0 is the left endpoint of the profile shown above and x = 52, y = 0 is the right endpoint, what is the equation, y=f(x), of the profile?

That was part A and the answer was y=2*sin((2*Pi*x)/13)

Pat B asks : What is the width (in inches) of a flat metal sheet that is needed to make a 52 inch wide corrugated panel 4 inches thick?
You may approximate the answer within .01 inches.

Could someone please explain part B for me.
Thanks

2007-12-13 09:13:39 · 1 answers · asked by Anonymous in Mathematics

I know this may seem odd, but think about it. Scientists can tell by tree growth rings is it was previously disease or infested by parasites. They can also tell by later rings that the tree was healthy. Why did the tree not sucumb? This makes me think a tree possess some sort of immune system

2007-12-13 09:11:36 · 3 answers · asked by dogwhisperer16 3 in Botany

2007-12-13 09:10:28 · 27 answers · asked by sassy 1 in Geography

a) 20 volts
b) 60 colts
c) 6.66 volts

2007-12-13 09:10:19 · 2 answers · asked by Manh Cuong N 1 in Engineering

i have to answers thees questions adn i dnt know them can you help me..here are some moe..


1.The type of radioactive particle that ca be stopper by a sheet of papr is the?

2.The most penetrating type of radioation is the?

3.A helium nucleus with two protons and two nuetrons is called (a)?

4.When the strong force is not sufficent to hold unstable nuclei together permantly?

5.An Intrusment that detects radiation by mean of a superheated liquid is?

2007-12-13 09:10:11 · 3 answers · asked by Anonymous in Physics

x - 7 = 30

2007-12-13 09:09:05 · 9 answers · asked by =smokeL 1 in Mathematics

2007-12-13 09:07:01 · 4 answers · asked by Anonymous in Biology

I want to learn more about plants by doing experiments at home with basic things from around the house. At the moment I am trying to reproduce a plant using a plant cutting. Any other ideas and/or links? Thank you!

2007-12-13 09:06:46 · 4 answers · asked by Laurie 5 in Botany

I am going to take the AP Calculus AB exam in april and im curious which book will help me "crack the AP test." I know there are so many books out there and I wanted to know which was the best one to help me. Thanks.

2007-12-13 09:06:42 · 1 answers · asked by Anonymous in Mathematics

a) 100 ohm
b) 200 ohm
c) .5 meg
d) 5k ohm
e) 5m ohm

2007-12-13 09:05:53 · 13 answers · asked by Manh Cuong N 1 in Engineering

2007-12-13 09:05:46 · 9 answers · asked by Nicholas L 1 in Mathematics

The planets are in orbit, if I could shot a hypothetical bullet through the middle of Mercury would it pass through the rest of the planets assuming that they were lined up one behind the other (like an eclipse) and also assuming the bullet could penetrate a planet.

2007-12-13 09:04:43 · 5 answers · asked by fwatkins6 3 in Astronomy & Space

it has been said that the evolution of mankind is speeding up and there are many areas that man lives which is contaminated with radiation/fallout in particular around chernobyl. will these people that must live and eat produce from these areas build up a resistance to radiation?

2007-12-13 09:04:31 · 15 answers · asked by Anonymous in Biology

2007-12-13 09:03:15 · 11 answers · asked by Anonymous in Zoology

A. bacteria
B. they function like seed
C. both of the above
D. none of the above

2007-12-13 09:01:54 · 2 answers · asked by Anonymous in Biology

2007-12-13 09:01:17 · 5 answers · asked by Anonymous in Mathematics

2007-12-13 08:59:58 · 15 answers · asked by Anonymous in Weather

2007-12-13 08:59:22 · 6 answers · asked by Anonymous in Astronomy & Space

i am doing an assessment in which i have to calculate errors. If a manufacturer gives the focal length of the eyepiece, what is a reasonable estimate of the inaccuracy?

would it be reasonable to expect a +/- 0.5 millimeter inaccuracy on an eyepiece that i have been told has a focal length of 7mm?

i am unsure of this though, as i am aware they can be very carefully manufactured.

so does anybody know what a sensible estimate would be?
thanks.

2007-12-13 08:57:02 · 2 answers · asked by fpa06mr 5 in Astronomy & Space

I'm talking about direct physical observations that can be made locally...

2007-12-13 08:53:28 · 8 answers · asked by comedycatalyst 2 in Other - Science

Which one and why???? Please use specifics and evidence...

2007-12-13 08:51:36 · 5 answers · asked by BIONICT? 2 in Earth Sciences & Geology

2007-12-13 08:49:47 · 2 answers · asked by CheetosMonster00 1 in Earth Sciences & Geology

X which has probability function
p(x)= 2(1/3)^x for x= 1, 2, 3,...
and use it to determine the value of u= E[X].
(Hint: Recall that Sum(from x=0 to infinity) ar^x= a/(1-r) for IrI< 1.)

2007-12-13 08:47:32 · 1 answers · asked by kondiii 1 in Mathematics

2007-12-13 08:44:44 · 2 answers · asked by sikhism4life88 1 in Biology

2007-12-13 08:44:09 · 4 answers · asked by cobra69 1 in Physics

...when the earth spins a day in 23h56mins?
It's appaling!
24h - 23h56 = 4mins
4min / day * 360days = 1440min
And 1day = 1440min

2007-12-13 08:42:55 · 7 answers · asked by Roy Nicolas 5 in Astronomy & Space

-5(3y-2y-5)

2007-12-13 08:42:17 · 11 answers · asked by rach 3 in Mathematics