Science & Mathematics - 6 November 2007

two sphere have equal densities and are subject only to their mutual gravitational attraction. Which the following quantities must have the same magnitude for both spheres.
a) acceleration
b) velocity
c) kinetic Energy
d) Displacement from the center of mass
e) Gravitational force
I think it is e

An ice skater is in a spin with his arms outstretched. If he pulls in his arms, what happens to his rotational kinetic energy?
a) increase
b) decrease
c) remains constant but non-zero
d) remains zero
i think it is a

2007-11-06 08:26:26 · 1 answers · asked by ken 2 in Physics

2007-11-06 08:25:47 · 3 answers · asked by Anonymous in Biology

2007-11-06 08:23:55 · 5 answers · asked by COREY 2 in Astronomy & Space

For those of you who excel at logic questions........Can you figure this
one out?
The answer will be in numbers, not spelled out.

There are 7 girls on a bus

Each girl has 7 backpacks

In each backpack, there are 7 big cats

For every big cat there are 7 little cats

Question: How many legs are there in the bus?

2007-11-06 08:23:39 · 8 answers · asked by BrittBritt212 1 in Mathematics

explain what must happen to a fixed sample of gas when its temperature changes.

2007-11-06 08:23:26 · 2 answers · asked by Anonymous in Chemistry

im just not sure what this is, please help. thanks in advance

2007-11-06 08:23:25 · 3 answers · asked by mg© - anti VT™ MG AM© Fundi4Life 6 in Mathematics

{x| -4, 4}
{x| -4, 10}
{x| -10, 10}
{x| -10, 4}

Here are my options. Can you please tell me the answer and how you got it! I understand how to get the answer but I dont understand which number goes first if you understand what i mean!

2007-11-06 08:19:58 · 10 answers · asked by Anonymous in Mathematics

i need someone to explain step by step how to solve this problem. I already have the answer to it, i just don't understand it. Thanks!

2007-11-06 08:17:48 · 5 answers · asked by shawna 2 in Mathematics

I need to know how a seisemograph can dectect and record lava flows to predict when a volicano will erupt

2007-11-06 08:16:31 · 2 answers · asked by Anonymous in Earth Sciences & Geology

math

2007-11-06 08:16:25 · 7 answers · asked by Danilo O 1 in Mathematics

2007-11-06 08:16:04 · 2 answers · asked by x-trang-x 1 in Chemistry

A recessive allele t is responsible for a condition called distonia. A man who has this condition marries a woman who doesn't. One of their four children has the condition. What are the possible genotypes of the man and woman?

A. father is Tt and mother is TT
B. father is tt and mother is TT
C. Both parents are tt
D. father is tt and mother is Tt

2007-11-06 08:15:53 · 1 answers · asked by wtetgrperrine38 1 in Botany

find thevalue using the properties of logarithms no calculators, how?

2log subscript6 3+ log subscript6 4
the 2, 3, 4, are not subscrpited or superscripted. only both 6 are subscripted.
thanks, i am studying for a test.

2007-11-06 08:15:20 · 3 answers · asked by Boo Radley 4 in Mathematics

What kind of technology is that? Think about it, you have a remote control car it stops after like a few hundred feet? Mars is like 100,000,000 miles away and we can control a rover there to dig a hole?? Wonder if anyone can explain this to me....

2007-11-06 08:15:07 · 7 answers · asked by Anonymous in Astronomy & Space

math

2007-11-06 08:14:58 · 8 answers · asked by Danilo O 1 in Mathematics

2007-11-06 08:14:25 · 3 answers · asked by Anonymous in Zoology

A) are a type of nerve cell.
B) release their secretions onto an epithelial surface.
C) release their secretions directly into body fluids.
D) contain very few vesicles.
E) are modified connective tissue cells.

2007-11-06 08:13:29 · 6 answers · asked by Doc-T 1 in Biology

2007-11-06 08:12:06 · 3 answers · asked by Alexander 6 in Physics

2007-11-06 08:11:19 · 15 answers · asked by tina d 1 in Mathematics

find the lim as x approaches infinity for 3x^2+20x/(4x^2+9)

also

find the lim as x approaches infinity for 5x-9/(4x^3+1)

How do you calculate limits at infinity?

I'd appreciate any help.

Thank You.

2007-11-06 08:10:33 · 3 answers · asked by Anonymous in Mathematics

2007-11-06 08:09:14 · 2 answers · asked by Anonymous in Chemistry

2007-11-06 08:06:25 · 4 answers · asked by Anonymous in Biology

2007-11-06 08:05:14 · 4 answers · asked by jean b 2 in Astronomy & Space

For example

a) 1653x ≡ 77(mod 2000)
b) x^2 ≡ 4x (mod 12)

which ones of these have solutions sand why...and how do you know what the complete solution is

thanks

2007-11-06 08:05:13 · 1 answers · asked by Anonymous in Mathematics

2007-11-06 08:05:03 · 2 answers · asked by PiscatawayPeg 1 in Astronomy & Space

2007-11-06 08:04:51 · 4 answers · asked by Anonymous in Biology

2007-11-06 08:02:01 · 2 answers · asked by Anonymous in Mathematics

K so I have to do a math question and it asks :
Explain how you can use a calculator to check the sign of a rational number.
Is they're a button you press or something on the calculator?
Please let me know :)
Thanks so much!

2007-11-06 08:01:43 · 1 answers · asked by Caitlin 3 in Mathematics

If you can back it up with sources, please do.

2007-11-06 08:01:23 · 11 answers · asked by scooter 4 in Agriculture

http://www.sagewisdom.org/usersguide.html

Salvia's effects: sensual enhancement, magical journeys, enchantment, apparent time travel, philosophical insights, spiritual experiences, and perhaps even healing and divination. It should not be used casually. It should always be used in a thoughtful, intelligent manner, and only by responsible adults that are of sound mind and clear intent.

The shaman of Mexico has used it for hundereds of years to help less spiritual people reach that type of state of mind.

2007-11-06 08:00:44 · 6 answers · asked by Father Ted 5 in Other - Alternative