Science & Mathematics - 21 July 2007

2007-07-21 09:11:06 · 4 answers · asked by msmith1515 1 in Physics

Hi people. Why, when you look up at the sky, does it look blue?

2007-07-21 09:10:14 · 10 answers · asked by Anonymous in Earth Sciences & Geology

Ok,i'm looking for the best all rounded telescope,by all rounded I mean it can look at Planets just as good as it can look at deep space objects like,maybe the Andromeda Galaxy or other Star Clusters.The telescope can be a Newtonian,Refractor whatever,I do not care.So long as it does what it says in this post.Also the Telescope has to be under £1000 or $1000 whatever,so long as it is under that price,oh and it has to be a computerised one,that actually finds objects on it's own.

Anyone who can do this,will prove that they know more about Astronomy than anyone.

2007-07-21 09:09:00 · 5 answers · asked by Anonymous in Astronomy & Space

I had to do a test for school ( to be accepted into school) and the math problem was:
Ksquared times Ksquared = r

I didn't know what to it was so I didn't do it. Can you figure it out for me?

2007-07-21 09:08:43 · 4 answers · asked by Devyn C 2 in Mathematics

A triangle is formed when you extend the edges of a line segment to a point outside the line containing the line segment. The area is bh/2, where b is the length of the line and h is the perpendicular distance.

Similarly, a cone, pyramid, etc. is formed when you extend the edges of a circle, polygon, etc. to a point outside the plane of the figure. The volume is ah/3, where a is the area and h is the perpendicular distance.

Does this pattern continue to higher dimensions? For example, if you extend a 3-D solid to a point outside the solid's 3-D space, is the "hyper-volume" vh/4, where v is the volume of the solid and h the perpendicular distance?

Also, what about circles, spheres, etc? Letting d = diameter, the area of a circle is πd²/4. The volume of a sphere is πd³/6. Does this pattern continue, i.e. is the hypervolume of the 4-D sphere πd^4/8?

2007-07-21 09:07:57 · 5 answers · asked by Anonymous in Mathematics

2007-07-21 09:07:54 · 4 answers · asked by Anonymous in Geography

From the following list of chemicals, select 2 combos that would lead to a double replacement reaction (complete balanced equations, too!)
KCl
HNO3
AgNO3
PbCl2
Na2SO4

Any ideas? Thanks

2007-07-21 09:01:25 · 2 answers · asked by pwbapro 1 in Chemistry

If anyone could explain how the following is done, it would be greatly appreciated!

Write the equation for the surface generated by revolving the given around the indicated axis.

4x + 9y^2 = 36 around the y-axis

2007-07-21 08:58:46 · 3 answers · asked by oldtimer 2 in Mathematics

Find the GCF for the list.
23b^2, 23b^2k^4, 19b^3

23b^2
b^2k^4
b^2
23b^2k^4

2007-07-21 08:57:18 · 5 answers · asked by Anonymous in Mathematics

Factor by grouping.
24x^2 - 20x + 30x - 25

(24x + 5)(x - 5)
(4x - 5)(6x + 5)
(24x - 5)(x + 5)
(4x + 5)(6x - 5)

2007-07-21 08:54:32 · 4 answers · asked by Anonymous in Mathematics

Factor out the GCF from the polynomial.
96x - 12

12x(8 - 1)
12(x - 8)
12(8x - 1)
12x(8x - 1)

2007-07-21 08:53:14 · 9 answers · asked by Anonymous in Mathematics

2007-07-21 08:52:13 · 6 answers · asked by curiosium 1 in Mathematics

and also, why is it that when SO3 is added to water the pH decreases?

2007-07-21 08:52:06 · 2 answers · asked by AP 1 in Chemistry

Factor by grouping.
xy + 11x - 2y - 22

(x - 11)(y + 2)
(y - 11)(x + 2)
(x + 11)(y - 2)
(y + 11)(x - 2)

2007-07-21 08:51:27 · 4 answers · asked by Anonymous in Mathematics

Would a standard plate count have detected the etiologic agent in the canned chilli peppers? Why or Why not?

2007-07-21 08:51:21 · 3 answers · asked by Anonymous in Biology

First, I would think " How the heck has no one noticed this in billions of years?" And secondly, I would think it's really weird. The moon HAVING moons???

2007-07-21 08:46:02 · 11 answers · asked by Anonymous in Astronomy & Space

do we want sun every day....?

2007-07-21 08:45:53 · 27 answers · asked by scottish football ....nuff said 5 in Weather

integral x^3 dx, from 0 to 2.
Use the trapezoidal rule and simpsons rule to approximate the value of the definite integral.

2007-07-21 08:42:56 · 3 answers · asked by LISA C 1 in Mathematics

2007-07-21 08:42:23 · 4 answers · asked by black cherry 1 in Mathematics

Radar signal reflection is important to small boats. And I have seen little or no reflection from other small boats on the water.

I want my boat to have a strong bounce when I'm 3 to 10 miles out from the radar of the ships in the shipping lanes. And I would want to show up well on other small boats radar at night or in a fog.

What do you think are the best ways to get higher radar signature? What would you recommend I do?

2007-07-21 08:40:58 · 3 answers · asked by Keith_Angler 2 in Engineering

Use the quadratic formula to solve the equation.

9x^2-5x-3=0


Answer: The solution set is {_____,______}
(Simplify your answers. Type an integer or a decimal number with 4 decimal places, as needed, and in increasing order. Type N if there are no real solutions.)

2007-07-21 08:39:57 · 3 answers · asked by hllywdbabe7 1 in Mathematics

2007-07-21 08:39:23 · 18 answers · asked by Anonymous in Earth Sciences & Geology

lakes, seas, oceans
rivers don`t count

2007-07-21 08:31:28 · 15 answers · asked by TTHOM 2 in Geography

2007-07-21 08:09:47 · 10 answers · asked by Anonymous in Astronomy & Space

please go to this website


http://www.mtoliveboe.org/440230123102814/lib/440230123102814/summergeometry07.pdf


and i need help with number 10... The last question of part 3.... please 10 points for the best one.....

2007-07-21 08:02:44 · 3 answers · asked by hey 3 in Mathematics

Its a town in central California.

2007-07-21 08:02:18 · 3 answers · asked by Anonymous in Geography

2007-07-21 07:56:47 · 7 answers · asked by Anonymous in Biology

im sure some of you have heard about the mayan calendar and the accuracy involved in it. according to them the moon, earth and the sun are all suppose to align on the date which means that the north and south pole can be moved to another part of earth which could be a major disaster.

2007-07-21 07:55:02 · 20 answers · asked by Navid G 2 in Astronomy & Space

2007-07-21 07:42:26 · 3 answers · asked by tanya_reece05 1 in Biology

Something easy to remember, please?


thank you,
Lakshmi Parimala

2007-07-21 07:39:59 · 14 answers · asked by Anonymous in Mathematics