Science & Mathematics - 15 September 2007

You light a candle how far away can people see it

2007-09-15 07:28:57 · 6 answers · asked by Ivan R 1 in Astronomy & Space

Underwater habitats have a few things in common with space habitats i guess, but i wonder how much the common traits out weight the uncommon traits when it comes to being adapted for use in space.

2007-09-15 07:21:32 · 5 answers · asked by Anonymous in Astronomy & Space

Suppose that a satellite is given a speed 10% larger than circular velocity. What would be the shape of the trajectory of the body?

2007-09-15 07:19:19 · 3 answers · asked by New Mommy 1 in Astronomy & Space

A painter drops a bucket from a ladder on the side of a building. The acceleration of gravity is 9.8 m/s
What is the speed (m/s) of the falling bucket after 2.42 seconds?
(neglect drag force)

Any help is appreciated! :)

2007-09-15 07:18:39 · 5 answers · asked by Catalina 2 in Physics

2007-09-15 07:13:10 · 2 answers · asked by zebbie g 2 in Zoology

998kg/m3 is the density of water at room temperature (20C).
conversion from kg/m3 to g/cm3 needed for this unit is used in laboratory experiments when dealing with small quantities of solutions

2007-09-15 07:12:22 · 6 answers · asked by gitana 1 in Mathematics

A 5 foot wire attached to the top of the tent pole reaches a stake in the ground 3 feet from the foot of the pole. Find to the nearest degree the measure of the angle made by the wire with the ground.

Please show me and thank you!

If it is cosine, then why?

2007-09-15 07:11:18 · 5 answers · asked by =] 1 in Mathematics

2007-09-15 07:11:13 · 5 answers · asked by Panos S 1 in Weather

plz tell me step by step how to solve this problem my teacher isnt being very clear with subtracting integers\


-4 + -6 - 8

2007-09-15 07:05:21 · 10 answers · asked by Anonymous in Mathematics

i know where just wanna make sure abuot it

2007-09-15 07:04:32 · 10 answers · asked by Anonymous in Astronomy & Space

2007-09-15 07:02:31 · 12 answers · asked by Anonymous in Astronomy & Space

if f(x) = 4x + 2, and g(x) = -2x - 1 then what is

2f(-1/4) - 3g(4)?

2007-09-15 07:01:13 · 3 answers · asked by San Fran Kid 2 in Mathematics

Preparing on my quiz and need to make sure I got it right... Thanks for your help!

2007-09-15 06:52:18 · 3 answers · asked by Miss baby 1 in Biology

Hey all, well i am in a bit trouble because i don't seem to understand vector subtraction. OK here it is:
V1 = -5i + 2j
V2 = -3i -9j

Now what i get is -8 and -7.But then i need to use the Pythagorean theorem to find sides on my triangle on the graph that i have. Since the number is negative i can't swuare root the last digit of the pothagorean theorem. WHat am i doing wrong,

2007-09-15 06:51:11 · 5 answers · asked by Anonymous in Mathematics

2007-09-15 06:51:01 · 23 answers · asked by Precious 1 in Zoology

In rectangle ABCD, diagonal AC is drawn. If m
Please help me and show me...Thanks!

2007-09-15 06:48:25 · 1 answers · asked by =] 1 in Mathematics

with all that pressure building up inside the earth, i think it could explode into a billion pieces at anytime.

2007-09-15 06:46:38 · 12 answers · asked by Anonymous in Astronomy & Space

Okay this is clearly impossible, but I'd like to know why:

If you managed to get a vehicle (let's say a bus) to travel at the speed of light and you were sitting at the back of the bus and needed to go to the loo; you'd get up, stroll down the bus and have not only had a poo but in the process you'd have managed to travel faster than the speed of light - quite a turd-trip.

I've posed the same question to my teachers and other inter-mal-ectual types and the closest thing I've got to a reasonable answer was; "you want to talk to Einstein, pal". (So very, very helpful)

So, can any of you geeks come up with the answer?

Just to clarify:

I know a bus isn't the best vehicle to reach light speed - It's a silly analogy - I know it'd never make it to that speed between stops. Please substitute with some other human sized container that could possibly make it.

2007-09-15 06:46:04 · 10 answers · asked by Will T 2 in Physics

6)Which of the following are true statements ?

a) The density of an substance is a chemical property

b) The thermal conductivity of a substance is a physical property

c) Saying argon is an inert gas describes a chemical property of this gas

d) Burning wood is an example of a chemical change

e) The melting temperature of an element is a physical property





7) A compound contains 70.8 percent silver. How many moles of silver does a 62.1 g sample contain ?

2007-09-15 06:40:32 · 4 answers · asked by matt b 1 in Chemistry

It would be cool to go to Mars just to explore caves, but that would probably fall into the category of a Geologists job right?

2007-09-15 06:40:30 · 5 answers · asked by Anonymous in Astronomy & Space

if x=2, y=-1, and z=3.....
evaluate nine times x squared times y divided by three times z.

Trying to stump the class...the person who stumps get the extra points...

2007-09-15 06:38:35 · 5 answers · asked by Anonymous in Mathematics

2007-09-15 06:36:46 · 6 answers · asked by kano7_1985 4 in Physics

i know my question sounds retarted but its for my history class. im going insane, i cant find the answer!
if someone could help me i would be SO happy
THANK YOU!!!
-jordan

2007-09-15 06:35:52 · 5 answers · asked by DanceForJoy 3 in Geography

'x' can be any integer value.............

2007-09-15 06:33:00 · 2 answers · asked by madhanjasmin 1 in Mathematics

Evaluate the integral: Where as the limits of integration are from 0 to 1.

1 4x^3 (1 + x^(4(2006)))
∫ __________________ dx
0 (1 + x^4)^2008

2007-09-15 06:27:51 · 1 answers · asked by MeganElizabeth 5 in Mathematics

Yes, this is homework help...

An object is said to have a negative potential energy. Because it is preferable not to work with negtative numbers, how can you change the value of the objects potential energy without moving the object?

2007-09-15 06:25:39 · 6 answers · asked by sugar_and_spice 2 in Physics

What is the distance between point A (6,4) and point B (-2,-2)?

2007-09-15 06:24:19 · 8 answers · asked by Kaylin H 1 in Mathematics

I don't get the spacing or what to do with a third variable (z).

2007-09-15 06:23:45 · 2 answers · asked by Ar J 2 in Mathematics

We know that when clouds get fertilized, their negative charge is placed in the bottom of the cloud, near to the ground, so that it can be easily transfered to the earth. and we know that if we connect a charged obstacle to the earth, it will become neutral, giving electron from or sending it to the earth. So whats the explanation for this behavoiur??? I know that the earth is too big, but it doesnt satisfy me. It MUST have a known charge, + or -,how can it send or gain electron if its neutral???

2007-09-15 06:21:57 · 3 answers · asked by maral namak 1 in Physics

I don't like stars . do you?

2007-09-15 06:18:39 · 24 answers · asked by Unverified emails 2 in Astronomy & Space