Science & Mathematics - 6 August 2007

I got this forwarded email, and I'm wondering about its validity.

On Monday, 27 August 2007, there will be two moons
in the night sky. In addition to the earth's moon,
planet Mars will shine the brightest. It will
look as large as the full moon to the naked eye. This
will happen on Aug. 27, when Mars comes within 34.65M
miles of earth. Be sure to watch the sky on Aug. 27
at 12:30 am. It will look like the earth has 2 moons!
The next time Mars comes this close is in 2287.

2007-08-06 16:52:23 · 2 answers · asked by Globetrotter 5 in Astronomy & Space

2007-08-06 16:46:37 · 4 answers · asked by swtaznbj34 2 in Mathematics

2007-08-06 16:45:48 · 3 answers · asked by swtaznbj34 2 in Mathematics

A question was asked to me about Newton's law of motion. It asked, "Supposing you were in space in a weightless environment, would it require a force to set an object in motion?" My initial thought was that in space, there is no gravity or friction, and therefore an object would stay in motion forever. However, it was revealed to me that force is still required to move an object in space and that the object still has inertia, which resists change in motion. But my initial thought still stands. So I guess my question is: Can an object be in a perfectly still state in space?

2007-08-06 16:32:04 · 13 answers · asked by Anonymous in Physics

A clarinet acts as a closed-ended air column. If its bottom note has a frequency of 130 Hz, how long is the column?

2007-08-06 16:29:46 · 1 answers · asked by Anonymous in Mathematics

I mean, yes, if it were a circle, all i'd have to do is find the circumfrence of the back gear, (on a bike) and divide the bigger front gear's circumfrence by that. but the thing is, the number of teeth vary from one set to another, and i want to make sure i'm putting my money in a new set of gears with a good enough difference. Also, some gear sets have slightly elliptical gears to make pedaling easier, (mine are too, but very very slightly.)

i'll need to know how to figure in the number of teeth and the tooth size if possible. thanks!

2007-08-06 16:23:55 · 2 answers · asked by Adeel 4 in Engineering

I'm curious!!!!

2007-08-06 16:08:39 · 5 answers · asked by Eugene 1 in Chemistry

If a person develops unification and makes a Grand Theory of Everything, what will society treat that person like? Will they love the person or hate the person? Will they be famous or infamous and etc?

2007-08-06 16:07:42 · 9 answers · asked by Anonymous in Physics

the crators on the moon with a telescope if the moon is like 3 to 4 days away from earth? the same with Saturn, isnt that planet like 8 years away?

2007-08-06 16:06:15 · 13 answers · asked by Anonymous in Astronomy & Space

Especially this one.

Solutions of cobalt(II) nitrate and potassium hydroxide are mixed. I got this answer but my teacher says it is wrong... any ideas?
Co(NO3)2 (aq) + 2 KOH- (aq) > Co(OH)2 (s) + 2 KNO3 (aq)

2007-08-06 16:05:41 · 1 answers · asked by Anonymous in Chemistry

Is there a cheap and easy way to spy on somebody? Is it true that you could spy on somebody and see everything a person does from your own computer? I heard that there is very hi-tech in spying. Like they can look directly at your eye and take the IP address from your eye like the IP address on the computer. And they go home and see everything you do or say on their computer in 1 or 2 weeks. Does this technology exist? Is there any other technology close to this?

2007-08-06 15:58:15 · 4 answers · asked by M m 1 in Engineering

The volume of a cube with edge of length 2 meters is what percent of the volume of a cube with edge of length 4 meters?

A) 12 1/2%

B) 20%

C) 25%

D) 40%

E) 50%

2007-08-06 15:51:44 · 14 answers · asked by Anonymous in Mathematics

Why is the temp. for dc taken in the state of virginia

2007-08-06 15:50:37 · 5 answers · asked by Andreu 2 in Weather

Also, what are the relative sizes of the atoms and their ions?

2007-08-06 15:43:51 · 2 answers · asked by thunderbomb90 3 in Chemistry

First they talk about the singularity, then they say some black holes are more massive than others. If it all falls into a singularity, how can the mass be different?

2007-08-06 15:39:54 · 14 answers · asked by MILTON H 2 in Astronomy & Space

Find domain and range of the function
f(x)=-3x^2-15x+12

S varies jointly as p and q. If p= 13 and q= 15, then S = 80. Write S as a function of p and q.

S=?

2007-08-06 15:36:46 · 3 answers · asked by Anonymous in Mathematics

How would I write that as an equation? I'm confused!

2007-08-06 15:26:56 · 8 answers · asked by Anonymous in Mathematics

I've been working on this for a few days.

r(x)=5sinx, s(x)=3cos2x

both have the domain of [0, 2pi).

I tried to make the two functions equal to each other and I got so far as :

5sinx=3cos2x

5sinx=3(1-2sin²x)

(5/3)sinx=1-2sin²x

(5/3)sinx=(1-sin²x) - sin²x

(5/3)sinx=cos²x - sin²x

I am probably doing this wrong... any tips and next step suggestions, please?

2007-08-06 15:26:33 · 6 answers · asked by Anonymous in Mathematics

I saw in usa today that I could see it any night if I looked hard enough

2007-08-06 15:25:52 · 7 answers · asked by Joey 2 in Astronomy & Space

2007-08-06 15:25:14 · 3 answers · asked by Anonymous in Mathematics

1) find the magnitude of the magnetic force on a proton moving with velocity 4.46 Mm/s in the positive x direction in a magnetic field of 1.85 T in the positive z direction. Answer in units of pN.

I got 9.33495 x10^-34, but im not sure if I am correct.

2007-08-06 15:25:03 · 1 answers · asked by Anonymous in Physics

a) 3i
b) -10
c) 10i
d) 7i

2007-08-06 15:23:43 · 11 answers · asked by Anonymous in Mathematics

2007-08-06 15:22:26 · 4 answers · asked by Anonymous in Mathematics

1) Two parallel copper rods are 1.3 cm apart. Lightning sends a 16 kA pulse of current along each conductor. The permeability of free space is 1.25664 x 10^-6 N/ A^2. Calculated the force per unit length on one conductor. Answer in units of N/m.

2007-08-06 15:20:16 · 2 answers · asked by jay b 1 in Physics

If you pour a glass of Pepsi (mostly acidic) and rub your finger on your nose and get the oils on it (base) and touch the foam it eats away the acid. How does it happen? Shouldn't the acid eat away at the base due to the nature of the chemicals?

2007-08-06 15:19:58 · 4 answers · asked by Matt 2 in Chemistry

what are five ways these relationships are determined? ex.?

2007-08-06 15:17:16 · 3 answers · asked by julie m 2 in Biology

Explain the difference between a logarithms of a product and the product of logarithms and give examples of each.

2007-08-06 15:12:52 · 3 answers · asked by CollegeYearRound 1 in Mathematics

Location is San Francisco

2007-08-06 15:12:43 · 7 answers · asked by Reto 1 in Weather

2007-08-06 15:12:41 · 2 answers · asked by Anonymous in Mathematics

log2x = log 4

2007-08-06 15:10:12 · 2 answers · asked by CollegeYearRound 1 in Mathematics