Science & Mathematics - 11 December 2007

2007-12-11 20:53:27 · 12 answers · asked by Anonymous in Astronomy & Space

2007-12-11 20:47:35 · 13 answers · asked by Anonymous in Astronomy & Space

2007-12-11 20:46:58 · 2 answers · asked by David Junior 3 in Mathematics

I've heard a lot of people saying that it would be fried if this was the case. I'm pretty sure this is false, but I'd like a definitive answer.

2007-12-11 20:35:45 · 8 answers · asked by Bob B 7 in Astronomy & Space

I need it for my astronomy essay, but the info i found isn't clear enough. Thanx.

2007-12-11 20:23:53 · 4 answers · asked by ~seniorina~* 1 in Astronomy & Space

I'm looking at the integral of a function f(x) between x0 and x0+delta_x.

The trapezium rule is that this integral is equal to 1/2 * the sum between i=1 and i= N-1 of( f(x0) + f(x0 + i*delta_x)) * delta_x.

Thanks.

2007-12-11 20:21:53 · 1 answers · asked by Anonymous in Mathematics

Is this possible to identify pure gold? or is there any sound test?

2007-12-11 20:20:28 · 2 answers · asked by Devoted 1 in Chemistry

any acronyms or something

2007-12-11 20:15:47 · 3 answers · asked by biomes 1 in Chemistry

ok having some issues with this problem.


I know the answer is
(1/x)+1

for

f(x)=x+1
g(x)=1/x

then for (g of f)(x)

answer is 1/x+1

I am trying to figure out how this answer came to be.
can someone please explain?

2007-12-11 19:53:37 · 5 answers · asked by Anonymous in Mathematics

Every book explains us about the nuclear reaction and chain reaction but no one tells us where do we get the first neutron to start the reaction. Is there any special instrument to give neutrons? where do we get the first neutron? Please explain in detail

2007-12-11 19:42:02 · 7 answers · asked by mmbaskr 3 in Physics

are perhaps.. in the world

2007-12-11 19:39:10 · 2 answers · asked by λngelicϐeauty Ƹ̴Ӂ̴Ʒ 3 in Geography

2007-12-11 19:30:43 · 4 answers · asked by ....................... 3 in Physics

2007-12-11 19:24:07 · 8 answers · asked by J B 1 in Mathematics

Car mass is 1500kg, starts from rest and accelerates to 18m/s in 12.0 seconds. Assume the air resistance remains constant at 400.0N during the time, what is the average power developed by the engine?

2007-12-11 19:20:40 · 2 answers · asked by Anonymous in Physics

Need help with PHYSICS problem (conservation of momentum)?
Here is the problem:

The longest bicycle in the workld was built in New Zealand in 1988 it is more than 20 m in length, has a mass of 3.4 x 10² kg, and can be ridden by four people at a time. Supposed four people are riding the bike south-east when they realize that the street truns and that the bike won't make it around the corner. All four riders jump off the bike at the same time with the same velocity (9.0 km/h to the northwest, as measured relative to Earth.) The bicylce continues to travel forward with the velocity of 28 km/h to the southeast. If the combined mass of the riders is 2.5 x 10² kg, what is the velocity of the bicycle and riders immediately before the riders escape?












i think its asking for v(initial), right?

does the change of direction affect the conservation of momentum??

the formula is m1x v1 (initial) + m2 x v2 (initial) = m1x v1 (final) + m2 x v2 (final)

please sovle and explain a little

2007-12-11 19:06:28 · 1 answers · asked by Tara V 2 in Physics

Need help with PHYSICS problem (conservation of momentum)?
Here is the problem:

The longest bicycle in the workld was built in New Zealand in 1988 it is more than 20 m in length, has a mass of 3.4 x 10² kg, and can be ridden by four people at a time. Supposed four people are riding the bike south-east when they realize that the street truns and that the bike won't make it around the corner. All four riders jump off the bike at the same time with the same velocity (9.0 km/h to the northwest, as measured relative to Earth.) The bicylce continues to travel forward with the velocity of 28 km/h to the southeast. If the combined mass of the riders is 2.5 x 10² kg, what is the velocity of the bicycle and riders immediately before the riders escape?












i think its asking for v(initial), right?

does the change of direction affect the conservation of momentum??

the formula is m1x v1 (initial) + m2 x v2 (initial) = m1x v1 (final) + m2 x v2 (final)

please sovle and explain a little

2007-12-11 19:02:39 · 3 answers · asked by Tara V 2 in Physics

if I wrote 11111111, would you know what number it represented immediately? Is it necessary to remember it in this way? What will be the benefits?

2007-12-11 19:01:40 · 7 answers · asked by Anonymous in Engineering

i read my pre-cal textbook and googled mathematical induction examples. and i still dont' understand.
i understood one part where i have to add (k+1) on LHS.
ugh... that's so far i can understand.
i have a test tomorrow morning and i still don't get it. my professor explained but have no clue!

2007-12-11 18:55:34 · 4 answers · asked by Anonymous in Mathematics

2007-12-11 18:53:17 · 8 answers · asked by bhudz 1 in Chemistry

If darkness inspires cold and when you think of a dark evil place its cold usually not hot then why do people sleep with the lights off in total darkness???

2007-12-11 18:50:04 · 7 answers · asked by Anonymous in Other - Alternative

How much did it cost to launch a space shuttle during the space race?

2007-12-11 18:48:52 · 2 answers · asked by english 2 in Astronomy & Space

I'm doing an experiment on which flower would produce the best scented essential oil but I want the process to be easy to prove that you can make your own essential oils instead of buying them at a higher price. So, I don't want to use a still or something like that because not everyone has stils at home. I need a simple, long lasting process that everyone can understand. On the internet, the processes I found were cumbersome (ex: steam distillation) composing of heavy equipment. Can anyone give me an easier process?

2007-12-11 18:47:43 · 1 answers · asked by Serina Subterfuge 2 in Botany

alright i just took a test and am wicked confused on these 2 problems, any insight of what vormula or anything i should have used.. thanks...
A) a 1000kg car J of work are done on a 1110 kg car while it accelerates from 10 m/s to some final velocity. find this velocity?


thanks in advance!!!

2007-12-11 18:47:10 · 3 answers · asked by nothankyou1110 2 in Physics

On December,13-14,2007 a comet known as the geminis
comet will enter earth atmosphere.

2007-12-11 18:45:31 · 3 answers · asked by Infinity 1 in Astronomy & Space

List the initial and long term effects of global warming on a country

2007-12-11 18:40:56 · 2 answers · asked by anotherperson 3 in Earth Sciences & Geology

I have a dataset, and z values for these. I want to calculate their probability percentage (z distribution), but not using the table (i.e. http://www.isixsigma.com/library/content/zdistribution.asp) I want to calculate it by hand since this is for a computer program. What is that formula?

2007-12-11 18:39:42 · 4 answers · asked by Anonymous in Mathematics

3/4 to %

2007-12-11 18:33:15 · 9 answers · asked by Anonymous in Mathematics

together Fred and Tony walked a total of 7 miles. If Fred walked x miles, how many milesdid Tony walk?

please explain

2007-12-11 18:26:16 · 7 answers · asked by Amy4U 1 in Mathematics

a solid "rock" would seem to keep spinning "balanced" but if it rotated (with its gravitational "pull" of its orbiting moons' gravitational "pull") with an orbiting moon reacting like it does with Earths tides it seems friction should have a much bigger effect on either the moons' orbiting distance from Earth and/or the rate of rotation of the Earth.

2007-12-11 18:17:31 · 11 answers · asked by LoLoLoLoLoLoL 2 in Astronomy & Space

What can too many negative G-forces do to the human body?

Cause a black out or a red out?
Its one or the other!

2007-12-11 18:15:28 · 4 answers · asked by Kurbuk (Кирбук) 2 in Physics