Science & Mathematics - 22 November 2007

Please explain

2007-11-22 06:27:41 · 12 answers · asked by Bobby S 3 in Mathematics

(This question is all about bearings and trigonomentry).

A helicopter has flown from its base on a bearing of 153 degrees. Its distance east of base is 19km. How far has the helicopter flown?

2007-11-22 06:27:29 · 3 answers · asked by Salsa034848 2 in Mathematics

An electron is released a short distance above the surface of the Earth. A second electron directly below it exerts an electrostatic force on the first electron just great enough to cancel the gravitational force on it. How far below the first electron is the second?


Anyone who can help me with this

2007-11-22 06:27:21 · 3 answers · asked by Hammad A 1 in Physics

Can u give me a homomorphism map from {1, -1, i, -i} to Z/4Z?

Z is the symbol for integers, i is root -1

thanks

2007-11-22 06:25:23 · 2 answers · asked by ___ 4 in Mathematics

if we mix water with oil and juice, and we separate water from the other the other liquids by using its boiling point, we can state that we use water's PHYSICAL PROPERTY or PHYSICAL CHANGE???

2007-11-22 06:20:48 · 3 answers · asked by Anonymous in Chemistry

Please explain!

2007-11-22 06:17:12 · 1 answers · asked by Bobby S 3 in Mathematics

2007-11-22 06:16:58 · 4 answers · asked by Anonymous in Astronomy & Space

2007-11-22 06:13:58 · 5 answers · asked by Anonymous in Engineering

Hg(MnO4)2 = mercury permanganate
CO=carbon monoxide
CaHPO4=calcium hydrogen phosphate
AL(OH)3=aluminum hydroxide
K2SO4=potassuim sulfate
N2 O5=dinitrogen pentaoxide
Ni O=nitrogen monooxdie

2007-11-22 06:08:34 · 8 answers · asked by mohjd s 1 in Chemistry

I just need to know, based on the limited information i have, which lenses are compatible with an inexpensive telescope i have.
On the Telescope it says:
302059CT
D=60 mm F=900mm
Coated Optics
Made in China

Does this mean i can use any lens with a Diameter of 60mm and a 900mm Focal Length?

2007-11-22 06:07:43 · 2 answers · asked by Chandler G 1 in Astronomy & Space

Theres this thing on the lewis structure and i dont understand it one bit i need help for single double and triple bonds: can som1 plz like do one example underneath and explain why and how?



PCL(subscript)3

C(subscript)2

CN

N(subscript)2S(subscript)3

HSF

SeO(subscript)2

2007-11-22 06:06:37 · 2 answers · asked by yankeesrule91692 1 in Chemistry

2007-11-22 06:04:03 · 2 answers · asked by glseme 1 in Astronomy & Space

2007-11-22 05:58:07 · 6 answers · asked by Anonymous in Other - Science

Or who had no turkey at all?

2007-11-22 05:55:52 · 6 answers · asked by john h 7 in Agriculture

Use synthetic division to determine which of the following is a factor of 2x3 - 13x2 + 17x + 12.
a. x - 2
b. x - 3
c. x + 4
d. x + 6

2007-11-22 05:55:24 · 2 answers · asked by surf22n30skate 1 in Mathematics

2007-11-22 05:53:56 · 8 answers · asked by Anonymous in Zoology

What is 3[f(x + 2)] if f(x) = x3 + 2x2 - 4?
a. x3 + 8x2 + 20x + 12
b. 3x3 + 12x2 + 18x + 6
c. 3x3 + 24x2 + 60x + 36
d. 3x3 + 18x2 + 24x + 60

2007-11-22 05:52:40 · 5 answers · asked by surf22n30skate 1 in Mathematics

What is f(3) if f(x) = -5x3 + 6x2 - x - 4?
a. -74
b. -88
c. 74
d. 182

2007-11-22 05:51:20 · 3 answers · asked by surf22n30skate 1 in Mathematics

What is the sum of all of the digits of all the whole numbers from 1 to 1,000,000 (inclusive?
Thanks for any answers in advance. :)

2007-11-22 05:47:14 · 11 answers · asked by cf_al_bs 2 in Mathematics

i think its called a proper fraction ro something, how would you solve that...thanks

2007-11-22 05:46:58 · 7 answers · asked by Anonymous in Mathematics

2007-11-22 05:44:30 · 5 answers · asked by Anonymous in Zoology

Two solid stainless steel, conducting spherical balls, of radii r1 = 2.0 cm and r2 = 10.0 cm, are connected by a thin copper wire, as shown in the figure (click on link below for figure). The spheres are 1.00 m apart, center-to-center. A total charge of Q = 12 microC is shared by the two spheres.

Link for figure: http://img108.imageshack.us/img108/5205/physicszs5.jpg

a) What are the charges Q1 and Q2 carried by the ball #1 (on the left) and ball #2 (on the right), respectively?

b) Taking the potential at infinity to be zero, what is the electric potential at the surfaces of the two spheres?

c) What are the electric fields just inside the spheres?

d) What are the electric field magnitudes just outside the spherical surfaces, and in what directions do they point?

e) What are the electric field x- and y- components, and also magnitude and direction, at a point P, 1.00 m away from the wire along the y-axis, as shown in the figure?

This is the review for my test. Please help. Thanks

2007-11-22 05:39:59 · 2 answers · asked by 123haha 1 in Physics

(a) Give an example in which the net force acting on an object is zero, yet the net torque is nonzero. (b) Give an example in which the net torque acting on an object is zero, yet the net force is nonzero.

2007-11-22 05:39:27 · 2 answers · asked by boy101 3 in Physics

any useful websites would be appreciated thanks

2007-11-22 05:35:45 · 2 answers · asked by Andy P 1 in Geography

One time on a cloudy day, I noticed up in the sky There was this brown dust. I also noticed some was near the ground. Then in the sky as the dust was clearing, I noticed a funnel cloud.

If you live in Connecticut, was there any tornadoes/landspouts reported?

P.S. At first I didn't have a remote for our T.V. when I saw it.

2007-11-22 05:33:32 · 2 answers · asked by Anonymous in Weather

i need it for a project

2007-11-22 05:33:28 · 3 answers · asked by Anonymous in Physics

I imagine that the encoding scheme is probably difficult to break without having the specifications and schema and they can’t Google it from several or more light years away.

2007-11-22 05:24:57 · 6 answers · asked by Anonymous in Astronomy & Space

2007-11-22 05:19:38 · 2 answers · asked by USK 1 in Mathematics

2007-11-22 05:16:56 · 24 answers · asked by Anonymous in Astronomy & Space

If yes, do you think they have more sophisticated technology than us?

2007-11-22 05:11:09 · 7 answers · asked by blinkatz 2 in Astronomy & Space