Science & Mathematics - 8 September 2007

if you could compare the size of the star ship enterprise from the next generation to any building on earth, what would that building be?????

2007-09-08 08:20:33 · 7 answers · asked by some people are rude 2 in Astronomy & Space

ok i have to find the lengths of the sides of 2 triangles..

i have a 30-60-90degree triangle and a 45-45-90degree triangle.

it says the hypotenuse of the triangles is one unit.. how do i find the lengths of the sides? it says no decimal approxamations, leave them in exact form.

2007-09-08 08:16:53 · 4 answers · asked by Anonymous in Mathematics

explain if you can
thanks

2007-09-08 08:12:43 · 9 answers · asked by Anonymous in Mathematics

Is f (x)= x^2 -3x-4 continuous for all real valued x? why is that?

2007-09-08 08:11:50 · 4 answers · asked by fvsdf s 2 in Mathematics

HI! This is so stupid that I can't stand it!!! I don't know why I can't solve it!

Okay, we have a ball that is dropped from a height of 294 feet that can drop at a rate of 34.3 feet/second. The height, s, can be calculated by the formula:

s(t) = 4.9t² + 34.3t

where t is the time in seconds. How long does it take for the ball to reach the ground?

I tried a few different ways (why doesn't the quadratic formula work?), but nothing comes out right! Please explain how you solve this (without graphing it). Okay thanks! I'll pick a best answer TODAY!

2007-09-08 08:11:42 · 7 answers · asked by Anonymous in Mathematics

1)A^4-B^4
2) 12A^2+AB-B^2
3)X^2-3x+XY-3Y
4) X^4+X^2-2

It'd be great to have some explanation with the answers. thanks

2007-09-08 08:11:07 · 2 answers · asked by Olivia R 1 in Mathematics

Electromagnetic waves are transverse; there are no transverse waves in a fluid; therefore, if there is an ether, it has to be a solid. Q.E.D!

If this is not my own original idea, please point me to a source who beat me to it.

2007-09-08 08:10:54 · 11 answers · asked by Anonymous in Physics

I had this question on my math test thursday. i have my scrap paper and wanted to see if i got it right. thanks in advance

2007-09-08 08:07:56 · 9 answers · asked by hsilvey05 2 in Mathematics

- many geological layers are very clean divisions without sign of erosion, roots or other signs of age and...
- many features of geology appear catastrophically created not gradually
- helium in zicons, a by product of Uranium decay has not diffuse very far suggestion some daughter byproducts of decay
have young appearance
- recent volcanic rocks are loaded with argon giving appearance of millions of years age with potassium argon and storntium argon techniques under evolutionary assumptions
- coal taken from the top of the geological column to the bottom have roughly the same high levels of C14 even in Cambrian diamonds

in retrospect, which view is the more sucessuful predictively

2007-09-08 08:07:06 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-08 08:01:18 · 6 answers · asked by Tom K 1 in Mathematics

2007-09-08 07:59:30 · 4 answers · asked by Shepard S 1 in Mathematics

For a project at school we have to drop an egg from 5 meters to the ground without breaking it. There can be nothing attached to it so we have to buld or come up with some kind of platform for it to land on. The platform can't be more than one meter in any direction and the height (thickness) from the ground can not be more than 5 cm (approx. 2 in.) to get an A. So the higher it is above 5 cm. the more points are deducted. Any suggestions? thanks

2007-09-08 07:59:00 · 3 answers · asked by bluebass90 1 in Physics

A Cessna aircraft has a lift-off speed of 120 km/h. (a) What minimum constant acceleration does this require if the aircraft is to be airborne after a takeoff run of 250m?
m/s2
(b) How long does it take the aircraft to become airborne?
s

2007-09-08 07:57:57 · 5 answers · asked by ags101 2 in Physics

If triangle ABC ~ DEF, BD=4 ft, and FD=1ft, find AC.

2007-09-08 07:55:22 · 4 answers · asked by yellowducks 1 in Mathematics

Doris spent 2/3 of her savings on a used car, and she spent 1/4 of her remaining savings on
vintage fuzzy dice. If the dice cost her $250, how much did her original savings total?

2007-09-08 07:55:09 · 11 answers · asked by crocsroc 2 in Mathematics

2007-09-08 07:54:27 · 7 answers · asked by andrue anderson 1 in Chemistry

THanks answer and show work

2007-09-08 07:54:08 · 8 answers · asked by Shepard S 1 in Mathematics

Find the domain and range of the function
f(x) = 2 x ^2 + 1, -1 ≤ x ≤ 2.

a. Domain [-2,2], Range [1,9]
b. Domain [-1,1], Range [2,9]
c. Domain [-1,2], Range [4,9]
d. Domain [-1,2], Range [2,∞]
e. Domain [-1,2], Range [1,9]

2007-09-08 07:52:43 · 2 answers · asked by Anonymous in Mathematics

5(x^6+1)^4(6x^5)(3x+2)^3+3(3x+2)^2(3)(x^6+1)^5
I know the answer but "I need to show my work:. I'm stumped!
HELP!!!

2007-09-08 07:49:24 · 6 answers · asked by ublion 1 in Mathematics

2007-09-08 07:47:37 · 12 answers · asked by twinkle 1 in Engineering

-2(2y-9) >/= 4-5(y-2)


*>/= is greater than or equal to

2007-09-08 07:47:35 · 8 answers · asked by dummiesx3 2 in Mathematics

a plane leaves the airport and flies 170km at 68 degreesNE and then changes direction to fly 230km at 48 degreesSE after which it makes an immediate emergency landing in a pasture. WHen the airport sends out a rescue from the airport, in which direction and how far should the crew fly to go to this plane

2007-09-08 07:47:19 · 2 answers · asked by tata 2 in Physics

2007-09-08 07:44:35 · 8 answers · asked by matt_sorrentino 1 in Mathematics

do i estimate the value or do you need to do heavy math to find
x.
Use the given graphs of f and g to estimate the value of f(g(x)) for x = -5, -4, ..., 4, 5.

the link to the graph is http://img407.imageshack.us/img407/1121/1352bw0.th.gif

(a) f(g(-5)) =
(b) f(g(-4)) =
(c) f(g(-3)) =
(d) f(g(-2)) =
(e) f(g(-1)) =
(f) f(g(0)) =
(g) f(g(1)) =
(h) f(g(2)) =
(i) f(g(3)) =
(j) f(g(4)) =
(k) f(g(5)) =

2007-09-08 07:42:50 · 1 answers · asked by ineedhelpbadly 2 in Mathematics

Stars are little balls of fire. They sooo can not speak.

2007-09-08 07:40:21 · 15 answers · asked by Anonymous in Astronomy & Space

equation for the change from fahrenheit to centigrade

2007-09-08 07:40:09 · 12 answers · asked by samadovaabditch 2 in Mathematics

If I know the actual diameter of an object (the Milky Way for example), does anyone know the math to calculate how far away it would have to be to subtend 45 degrees of the sky?

I know there is a formula that will calculate apparent size from distance and actual size, but I just can't find it.

2007-09-08 07:36:50 · 2 answers · asked by Anonymous in Astronomy & Space

I need help. Please! It's for homework!
3xy-7 when x=4, y=12, and z=9

2007-09-08 07:35:59 · 8 answers · asked by ? 2 in Mathematics

The net ionic equation of the reaction between Ksubscript2Crsubscript2Osubscript7 and FeSOsubscript4 in an acidic medium is given below:

Crsubscript2Osubscript7superscript2- + 6Fesuperscript2+ + 14H ---> 2Crsuperscript3+ 6Fesuperscript3+ +7H2O

a)how many moles of Ksubscript2Crsubscript2Osubscript7 can be reduced by 0.0865 mol of FeSOsubscript4?
b) how many moles of Crsuperscript3+ would be produced?

2007-09-08 07:34:36 · 2 answers · asked by Anonymous in Chemistry

2007-09-08 07:32:03 · 4 answers · asked by anonymous 2 in Zoology