Science & Mathematics - 28 October 2007

Calculate the force of gravity on a spacecraft 32000 km (5 earth radii) above the Earth's surface if its mass is 1900 kg.

______________N (toward the earth)

2007-10-28 13:30:19 · 1 answers · asked by hayleym425 2 in Physics

Do they planets orbit on one single plain around the sun.

2007-10-28 13:29:56 · 7 answers · asked by neil_gormley 1 in Astronomy & Space

...in plants

2007-10-28 13:29:28 · 1 answers · asked by Anonymous in Biology

I was going over a practice SAT exam and I saw a problem involving x∆y, and I've never seen this before. Anyone familiar with what that means? The problem is x∆y = x^2 +xy +y^2, what is the value of (3∆1)∆1..

Someone was telling me that ∆ was the equivalent of ^, but if that was the case to get the y out of the exponent you'd have to take the natural log of both sides..

Any help much appreciated

2007-10-28 13:28:05 · 3 answers · asked by armagedon472 2 in Mathematics

Show that this series converges to ln(2). Consider the n-th Taylor Polynomial for ln(x) at x=1 and the corresponding term

∞
∑ ((-1)^(n+1))*(1/n)
n=0

I have absolutely no idea how to do this, can anyone help me plz!?!?!?!

2007-10-28 13:27:58 · 4 answers · asked by Anonymous in Mathematics

2007-10-28 13:27:14 · 2 answers · asked by Anonymous in Biology

anyone knows?

2007-10-28 13:26:32 · 13 answers · asked by michdur07 5 in Astronomy & Space

2007-10-28 13:26:32 · 1 answers · asked by hamid r 2 in Botany

2007-10-28 13:24:28 · 17 answers · asked by bearzer83 1 in Astronomy & Space

Why is radiant heat preferable to forced-air heating in each of the following?
a. open loading areas
b. shower rooms
c. high ceiling industrial areas

2007-10-28 13:22:59 · 6 answers · asked by masrbobo 1 in Engineering

2007-10-28 13:21:37 · 24 answers · asked by BlazenThaTrack77 2 in Paranormal Phenomena

a. 2880
b. 2520
c. 2700
d. 3240

2007-10-28 13:20:27 · 2 answers · asked by Anonymous in Mathematics

I need help with this biology question...

"State and explain one theory to account for the movement of liquids through phloem cells."

Thanks in advanced.

2007-10-28 13:18:29 · 1 answers · asked by Exodus 2 in Biology

2007-10-28 13:17:07 · 1 answers · asked by =D<333 2 in Chemistry

and back. The static coefficients of friction between his shoes and the wall, and between his back and the wall, are 0.73 and 0.57, respectively. What is the minimum normal force he must exert? Assume the walls are vertical and that friction forces are both at a maximum. Ignore his grip on the rope.

2007-10-28 13:15:30 · 1 answers · asked by Doc 2 in Physics

2007-10-28 13:13:52 · 5 answers · asked by lovebird 3 in Mathematics

8(f+3)=10f-32 anyone know

2007-10-28 13:11:53 · 18 answers · asked by Jasmine J 1 in Mathematics

If so, to what extent do they provide assistance against those of higher caliber and if not, why can't vests be manufactured to respond to these weapons?

2007-10-28 13:10:24 · 1 answers · asked by BarryBadrinath 2 in Other - Science

Been given some maths homework and it asks the questions:

Find the constants of a and b such that, for all values of x,
x^2 + 4x + 14 = (x + a)^2 + b

and

You are given that f(x) = x^3 - 7x + 6
1 Show that (x-2) is a factor of f(x)
2 Solve the equation f(x) = 0

I have no idea how to do these and I would really appreciate if someone could possibly post a walkthrough to the solution or just a walkthrough so I can attempt it myself, either one's good.

Thanks :)

2007-10-28 13:08:23 · 1 answers · asked by Alex P 2 in Mathematics

if you've never heard of Weather Modification don't answer this question...

2007-10-28 13:07:47 · 3 answers · asked by Anonymous in Weather

If the electron is the smallest possible unit of matter, what is in between them and what is that made up of?

2007-10-28 13:06:54 · 2 answers · asked by Anonymous in Chemistry

When is it beneficial to work with angles measured in radians/ degrees?

2007-10-28 13:06:04 · 2 answers · asked by Anonymous in Mathematics

solving for simplified radical answer

(4/3x)-(3/x^2) = (1/5)

2007-10-28 13:04:29 · 3 answers · asked by phresh 1 in Mathematics

At present 40 apple trees are planted per acre and the average yield is 20 bushels per tree. Suppose the experienced grower estimates that for every 5 new trees added per acre, the yield will decrease by 2 bushels per tree. One is interested in how many trees should be planted per harvest.

Let x=trees per acre added
Let H(x)=bushels of apples per acre.


I know that there should be 45 trees/acre for the max bushels, but how do I get the equation? Any help would be appreciated.

2007-10-28 13:01:59 · 3 answers · asked by Liz 4 in Mathematics

C is 92.3% and Hydrogen is 7.7%, how do you calculate its simplest formula which is just CH from that?
thanks if you can help.

2007-10-28 13:01:50 · 1 answers · asked by Boo Radley 4 in Chemistry

2007-10-28 13:01:32 · 5 answers · asked by meesha 1 in Medicine

2007-10-28 13:01:13 · 4 answers · asked by strummer girl 2 in Engineering

I am attempting to find the daily precipitation for Hendersonville, NC for specific dates in 2005, 2006 and 2007.

2007-10-28 13:01:04 · 4 answers · asked by horse100creek 1 in Weather

The squares of a nxn checkerboard are to be colored with m colors.
Two colorings are said to be equivalent of one can be transformed into
the other by a rigid motion of the checkerboard in 2 dimensions
(no flips).How many colorings are there?
Can you explain how you got that answer? Additionally, the question says to consider the cases for n even and n odd.. but there is no other information. I don't think it has anything to do with the equivalence classes.

2007-10-28 13:00:26 · 1 answers · asked by Anthony M 1 in Mathematics

People say quantum physics is wierd. What about even smaller?

Like emagine if we could examine stuff 10 times deeper than we already can would people still say the creation of a new human is a simple chemical process.

2007-10-28 13:00:22 · 6 answers · asked by Anonymous in Biology