Science & Mathematics - 14 July 2007

2007-07-14 11:37:50 · 7 answers · asked by Believe 2 in Botany

In Degrees and Minutes, no sarcasim please.

2007-07-14 11:36:17 · 3 answers · asked by °†¿ÐámñéÐ?†° 2 in Mathematics

and what are you doing about it?

personally I'm somewhat glad it's hotter,because i hate cold,but there are some weird stuff happening too,like snow on some places it never snowed before.

2007-07-14 11:35:30 · 8 answers · asked by Frozen.Flame 3 in Weather

How did math turn out to be like it today,how can it be use to solved or invent things?

2007-07-14 11:34:04 · 5 answers · asked by Anonymous in Physics

Dividing Rational Expressions
__1__ + __1__
(c-d) (d-c)



__6__ + ___8__
(5y²-45) ( 3-y)


__10__ - ___6b___
(a-b) ( a ² - b ²)

Solving Rational Equations

_3_ - __4r__ = -4
(4r) (r -3)

_3__ ∕ _4x_ = 4
(4x) (x-3)

_u__ - _2u___ = _u²___
(u+2) (2-u) (u²-4)



Thank you so much! I put the denominators in brackets because they bunch up for some reason.

2007-07-14 11:33:53 · 3 answers · asked by Anonymous in Mathematics

Show that sinθ = cosθ tanθ

2007-07-14 11:33:49 · 3 answers · asked by °†¿ÐámñéÐ?†° 2 in Mathematics

I am preparing to take advanced placement calculus BC starting in september, but want to prepare over the summer, what are the main topics I should study in order to prepare for calulus? what are some topics that must be mastered before entering calculus? thanks in advance.

2007-07-14 11:30:19 · 7 answers · asked by Carpe Diem (Seize The Day) 6 in Mathematics

There is plenty more evil in the world then good. No science has been able to even explain the rise of Naziism. Even caos theory only explains the balance of matter, not the inter-relationship between people and events. Under random chance something bad is more likely to happen to you then something good.

2007-07-14 11:27:20 · 10 answers · asked by wisemancumth 5 in Physics

Fossil fuel use, as well as producing greenhouse gases, creates other by-products. These by-products are also pollutants, such as sulphur dioxide, soot, and ash. These pollutants however, also change the properties of clouds.

Clouds are formed when water droplets are seeded by air-borne particles, such as pollen. Polluted air results in clouds with larger number of droplets than unpolluted clouds. This then makes those clouds more reflective. More of the sun’s heat and energy is therefore reflected back into space.

This reduction of heat reaching the earth is known as Global Dimming.

2007-07-14 11:26:55 · 4 answers · asked by Anonymous in Earth Sciences & Geology

The spaceshuttle doesn't. Do you need lights to navigate intergalactic space?

2007-07-14 11:26:32 · 26 answers · asked by cortexmirabile 1 in Astronomy & Space

Hi. I'm trying to simplify this: 36/B=(36/30-B)-1. How am I supposed to do this? I know how to cross multiply, but im not sure how to do it if there are two fractions on one side. I know that the completely simplified answer is B^2+42B-1080=0, if that helps. Please help me! Thanks

2007-07-14 11:25:04 · 5 answers · asked by Anonymous in Mathematics

Tell me a material to reflect RF signals. I want to build a sphere of a material. Emit some RF signals. And these signals will bounce back from the sphere and I will read them...

2007-07-14 11:20:58 · 5 answers · asked by Anonymous in Engineering

We Test our coal and samples keep coming back great, at the coal yard, On the trucks when leaving, and at the Power Plant and then the coal comes back from the plant lab as bad coal... Multi- testing has been done How,, some with answer of seeking help please advise...

2007-07-14 11:14:51 · 2 answers · asked by Anonymous in Engineering

You are driving your car on a straight level road and slam on your brakes and skid to a stop over a distance of 20m(your car doesn't have anti-lock brakes). If you had been traveling twice as fast, what distance would be required to stop your car under the same conditions?

a) 28m
b) 30m
c) 40m
d) 60m
e) none of the above

2007-07-14 11:12:20 · 7 answers · asked by Anonymous in Physics

2007-07-14 11:10:59 · 10 answers · asked by neina khan 2 in Biology

2007-07-14 11:10:19 · 3 answers · asked by Anonymous in Earth Sciences & Geology

1)Donna invested her 33,000 bonus and received a total of 970 in interest after one year. If part of the money returned 4% and the remainder 2.25% then how much did she invest at each rate?

2)at gwens garage sale all books were one price, and all magazines were another price. Harriet bought four books and 3 magazines for 1.45, and june bought 2 books and 5 magazines for 1.25. what was the price of a book and what was the price of a magazine?

3) Ziggys famous yogurt blends regular that is 3% fat with its no fat yogurt to obtain low fat yogurt that s 1% fat. How many pounds of regular yogurt and how many pounds of no fat yogurt should be mixed to obtain 60lbs of low fat yogurt?

4)the probability that the san francisco plays in the next super bowl is 9 times the probability that they do not play in the next super bowl. the probability that they play in the super bowl plus the probability that they do not play is 1. what is the probability that they play in the next super bowl?

2007-07-14 11:08:13 · 3 answers · asked by Mandalicious 1 in Mathematics

or if you know the actual answer i would appreciate it

2007-07-14 11:07:31 · 9 answers · asked by dindaplace2b 2 in Astronomy & Space

2007-07-14 11:06:18 · 8 answers · asked by mikeleeiscool 1 in Mathematics

2007-07-14 11:05:50 · 9 answers · asked by mikeleeiscool 1 in Mathematics

2007-07-14 11:04:26 · 6 answers · asked by Anonymous in Engineering

2007-07-14 11:02:52 · 2 answers · asked by JAMES 4 in Engineering

Rt=1/█(1/R^1 +1/R^2 ) simplify the formula.

2007-07-14 11:02:30 · 4 answers · asked by Anonymous in Mathematics

2007-07-14 11:00:50 · 6 answers · asked by tracyterry 3 in Astronomy & Space

2007-07-14 11:00:01 · 12 answers · asked by punter hunter 1 in Astronomy & Space

2007-07-14 10:55:05 · 16 answers · asked by John S2005 3 in Physics

could you explain?

2007-07-14 10:51:47 · 10 answers · asked by Anonymous in Mathematics

On the moon and in the international space station and in shuttles

2007-07-14 10:48:43 · 6 answers · asked by Anonymous in Astronomy & Space

10^4

and

(a^2 b^0 c)^0

your help is appreciated!

2007-07-14 10:47:13 · 3 answers · asked by Anonymous in Mathematics

Circumference of the earth is 25,000 miles. Imagine you have a wire that is 25,000 miles plus 3 feet, and you wrap the wire around the equator of the earth. You wrap the wire so that both ends meet and do not overlap. The wire is hovering above the equator, now is there enough room between the earth and the wire for a 5 inch tall chick to walk in between? Or will the chick simply step over the wire? Or will the wire be at a height where the chick cannot go under or over the wire? Keep in mind that the earth is not a perfect circle, it is more of an ellipsoid shape. Details please.

2007-07-14 10:44:16 · 3 answers · asked by Anonymous in Mathematics