Science & Mathematics - 26 October 2006

I'm tutoring a student in algebra, and one of the questions doesn't seem to work with the answer given in the answer guide.

The question is:

A person can see 72 miles to the horizon from an airplane window. How high is the airplane? Use the formula V = 3.5*SQRT(h)

The answer given is 3600 ft.

No other information should be needed (like the diameter/circumference of the earth as this is a basic college algebra class). Even trying to convert between feet and miles in different ways, I can't get the answer.

2006-10-26 15:09:23 · 7 answers · asked by firemedicgm 4 in Mathematics

hmmmmmm ???????

2006-10-26 15:09:21 · 17 answers · asked by garrbear99 1 in Astronomy & Space

we built a bag opener like for chips...to open chips so we used pulleys and to clips but the clips arent strong enough to get pulled what do I do...we already have that built but we dont really need the clips since they dont work

2006-10-26 15:07:30 · 2 answers · asked by Lane'a BayBee89 1 in Engineering

(a) What is the minimum frequency of light necessary to emit electrons from cesium via the photoelectric effect?_________s-1

(b)What is the wavelength of this light? ______nm

(c) If cesium is irradiated with light of 416 nm, what is the maximun possible kinetic energy of the emitted electrons? ______J

Please help..ive been working on this for a while, and cant seem to get the right answer!!

2006-10-26 15:07:18 · 1 answers · asked by lsubetty 2 in Chemistry

how does the size of the force of the cannon on the cannonball compare with the force of the cannonball on the connon? how does the acceleration of the cannon compare with that of the cannonball? Defend your answer.

2006-10-26 15:01:44 · 7 answers · asked by water yu 3 in Physics

This is part of my home work and i need the info fast

2006-10-26 15:01:33 · 5 answers · asked by Anonymous in Earth Sciences & Geology

What is a function iteration exactly? How does it relate to fractals?
Exactly how to graph a simple one such as y=0.5x + 3? Finally, how to tell if it's attracting, repelling, etc. And what is the attracting/repelling point?

Please help me!!! Thank you all if you answer!

2006-10-26 15:01:08 · 4 answers · asked by Rune 3 in Mathematics

2006-10-26 14:59:14 · 1 answers · asked by deonne h 1 in Geography

Ghana, Mali, and Songhay engaged in long distance trade by traversing what African geographic feature?

A. Indian Ocean

B. Rain Forests of Central Africa

C. Sahara

D. Kalahari desert

THANKS

2006-10-26 14:56:35 · 4 answers · asked by ha 1 in Geography

2006-10-26 14:55:33 · 3 answers · asked by cheesesticks320 2 in Chemistry

2006-10-26 14:55:16 · 7 answers · asked by Kendall F 1 in Earth Sciences & Geology

Find the local linear approximation of the function
y= sqr(1+x) at x_0=0, and use it to approximate sqr0.9 and sqr1.1.

I got 1+1/2x for the linear function, but i didn't get the approximate number.

2006-10-26 14:54:55 · 3 answers · asked by daniel_hower 1 in Mathematics

2006-10-26 14:54:37 · 19 answers · asked by Lynn 2 in Botany

In what way did the geography of Japan affect the development of ancient Japanese government?

A. Since Japan is an island nation, the first emperors were great sea captains.

B. Japanese geography encouraged the development of centralized power in the hands of strong emperors.

C. Reliance on many separate rice farmers encouraged the growth of popular democracy.

D. Mountainous terrain resulted in regional, rather than national governments

2006-10-26 14:53:05 · 3 answers · asked by ha 1 in Geography

2006-10-26 14:52:31 · 1 answers · asked by Larson D 1 in Chemistry

2006-10-26 14:50:10 · 6 answers · asked by dgreenrcls 1 in Biology

Give coordinates of the point where the line for equation crosses the y-axis.
y = 3x + 4
Also write equation for the line passing through each pair of points. (3,8), (2,6)

2006-10-26 14:49:42 · 2 answers · asked by Anonymous in Chemistry

Three times the greatest of 3 consecutive even integers exceeds twice the least by 38. Find the integers.
Can you also tell me how you solved it.
Thanks.
:]
<3Johnny.

2006-10-26 14:48:58 · 9 answers · asked by JJ 1 in Mathematics

2006-10-26 14:48:45 · 5 answers · asked by M.R. B 1 in Mathematics

Wouldn't this be a tremendous advantage?

It sure works for COPS these days!!

2006-10-26 14:48:29 · 8 answers · asked by fresh2 4 in Biology

just seems like the right thing to do, any ideas?
by the way, if your idea is gonna have expensive things involved, keep in mind that i have a budget of about $100

2006-10-26 14:47:53 · 11 answers · asked by Anonymous in Astronomy & Space

2006-10-26 14:47:36 · 0 answers · asked by chanel_addiction 1 in Biology

pliss help me.... i really need this answer.. jk

2006-10-26 14:46:46 · 2 answers · asked by hartanto h 1 in Mathematics

independent, dependant, direct or indirect?

2006-10-26 14:45:46 · 3 answers · asked by foxy lady 2 in Physics

2006-10-26 14:44:31 · 1 answers · asked by chris 2 in Mathematics

it was a reddish color, and it looked like it had claws for front legs. it looked like a crab

2006-10-26 14:42:53 · 6 answers · asked by leslielandes 1 in Biology

Was New France located in Canada?

2006-10-26 14:41:36 · 2 answers · asked by brighton 3 in Geography

2006-10-26 14:41:06 · 4 answers · asked by mewichigocutie 1 in Mathematics

10
sq root |x - 5| dx =
0

2006-10-26 14:38:45 · 3 answers · asked by Olivia 4 in Mathematics

10
sq root |x - 5| dx =
0

2006-10-26 14:38:38 · 2 answers · asked by Olivia 4 in Mathematics