Science & Mathematics - 9 September 2007

Hello from Britain. I am starting to get interested in the night skies and would like to know more. What is the best book-or-internet resource for a beginner, which explains things nice and simply to start off with but progresses to more complex material once the fundamentals are grasped?

Also if I want to purchase a telescope, what should I look for, and avoid? I'd like a (reliable) budget model, one that is noice-friendly but will still serve me well as I get more serious.

What other basic equipment should I invest in?

Thanks!

2007-09-09 07:26:50 · 14 answers · asked by Monty 1 in Astronomy & Space

2007-09-09 07:26:00 · 10 answers · asked by garrisongurl_16 1 in Mathematics

2007-09-09 07:24:42 · 1 answers · asked by Stacilee G 1 in Mathematics

2007-09-09 07:18:49 · 7 answers · asked by dezi2020 1 in Mathematics

(i)

On a photograph a person stood next to a rock is 5.8 cm high and the rock was 3.8 cm across.

Assuming the person is 17 m tall what is the actual width of the rock?

Can you show working please.

2007-09-09 07:13:59 · 3 answers · asked by Rachel 1 in Mathematics

Member since: June 26, 2007
Total points: 420 (Level 2)
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how do you evaluate the limit of (lim x->0) tan3x / x , and (lim x->0) 1-cos3x / x^2, and ( lim x-> 0) sinx - tanx / sin^3x.

2007-09-09 07:13:56 · 2 answers · asked by Sweetness 2 in Mathematics

can anybody explain to me what is physics? plz add informin details!

2007-09-09 07:13:00 · 16 answers · asked by ajaz 1 in Physics

Or do you think that genes and DNA alone are responsible for our cell biology?

2007-09-09 07:12:39 · 7 answers · asked by LUCKY3 6 in Biology

2007-09-09 07:03:26 · 4 answers · asked by wickedwitch1992 2 in Biology

why is it not possible to travel faster then light

2007-09-09 07:01:56 · 9 answers · asked by some people are rude 2 in Physics

The charge distribution is an open-ended cylindrical shell of charge q, radius R, and length H (a cylindrical side with no ends). The Gaussian surface S is a cylindrical shell with radius r and length h, with r > R. Determine the net electric flux given that q = 8Q, R = 5L, H = 4L, r does not apply, and h = 3L (type the integer value, along with the sign, without typing units Q/e0):


Please help me..

2007-09-09 06:59:47 · 2 answers · asked by NOne N 1 in Physics

and for calculus what kind o f calulaotr do you need is an ti-83 ok to use in a calculus class? thanks

2007-09-09 06:57:21 · 4 answers · asked by namso141 3 in Mathematics

2007-09-09 06:56:30 · 1 answers · asked by teenwolf 13 1 in Earth Sciences & Geology

2007-09-09 06:51:59 · 3 answers · asked by LUCKY3 6 in Physics

Hi im thinking of getting a gyroscope but im not sure why i mean they look kwl but whats so cool about them and what can they do

2007-09-09 06:47:47 · 5 answers · asked by Ariel A 1 in Engineering

2007-09-09 06:47:21 · 3 answers · asked by dgoosed1 1 in Engineering

*Can you please explain some of the relationships between log and natural log...I'm confused about when I use natural log in expressions like the inverse of f(x)=e^x/7e^x?
*Also, how do I find the exact value of each expression such as arctan(sqrt3), or sin-1(-sqrt3/2)?
Explanations on this concept in general are welcome, too!

Can't thank you enough.

2007-09-09 06:39:42 · 2 answers · asked by stars_sun_sky 1 in Mathematics

A fish swimming in a horizontal plane has velocity vi = (4.00 i - 3.00 j) m/s at a point in the ocean whose displacement from a certain rock is ri = (10.0 i + 4.00 j) m. After the fish swims with constant acceleration for 15.0 s, its velocity is v = (16.0 i - 5.00 j) m/s.
Q: What direction of acc with respect to vector i? Where is fish at t=20 s? What direction is ti moving?

2007-09-09 06:39:06 · 1 answers · asked by ひいらぎ 5 in Physics

2007-09-09 06:36:36 · 5 answers · asked by king c 1 in Physics

2007-09-09 06:34:54 · 7 answers · asked by tlc 1 in Mathematics

A Pedatric Dermatologist - Who completed a fellowship in Pedatric Dermatology, which help kids with skin issues

or

A Pedatric Oncologist/Hematologist - A Doctor who complete a residency in Pedatrics, and completed a fellowship in Oncology/Hematology

Which of these two (The one I will pick from) have a better and good meaning ?

2007-09-09 06:34:27 · 11 answers · asked by Anonymous in Medicine

for example is 52. Can you send me websites that explain problems as such?

Thank you! :)

2007-09-09 06:34:25 · 7 answers · asked by brooklynchyck808 3 in Mathematics

A car starts from rest and travels for 4.9 s with a uniform acceleration of +1.2 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.2 m/s2. The breaks are applied for 1.70 s.
How far has the car gone from its start?

2007-09-09 06:32:17 · 2 answers · asked by ? 1 in Physics

A bus slows down uniformly from 69.7 km/h (19.4 m/s) to 0 km/h in 24 s. How far does it travel before stopping?

2007-09-09 06:31:39 · 3 answers · asked by ? 1 in Physics

integral(1/(x^2(x^2-16)^.5))

show work

2007-09-09 06:31:13 · 1 answers · asked by the man 2 in Mathematics

A sailboat starts from rest and accelerates at a rate of 0.23 m/s2 over a distance of 406 m.
(a) Find the magnitude of the boat's final velocity.
(b) Find the time it takes the boat to travel this distance.

2007-09-09 06:30:16 · 3 answers · asked by ? 1 in Physics

y=4x + 3

2007-09-09 06:30:05 · 5 answers · asked by xoxoxo 4 in Mathematics

i wanna know how does geography affects my life

2007-09-09 06:28:54 · 12 answers · asked by koyakoles 1 in Geography

2007-09-09 06:28:36 · 6 answers · asked by James H 1 in Astronomy & Space

I'm trying to make my own keyboard with many less keys than a conventional one. It would only have about 10 keys. I have most of the hardware problems figured out. Now comes the part about interfacing it with the computer. Could I have each keypress event send power through a specific resisitor, which would send power to a capacitor? The power would then be sent through the data channel of a serial cable and the pulse would be measured in terms of time by a program I will write. Is this at all possible or would I absolutely need to buy an ADC. If I used another channel besides the data line in the serial cable, would I be able to avoid an ADC? Thanks a lot in advance. Please either answer here or email me at legsmacgee@yahoo.com!

2007-09-09 06:26:28 · 4 answers · asked by Legs M 3 in Engineering