Science & Mathematics - 28 October 2007

I heard from someone that if a there has been a full moon for more than 3 nights something bad is going to happen?? Oh and I have another question. If there has been a full moon for a while and it persists into Halloween night something bad is supposed to happen??

2007-10-28 07:17:52 · 6 answers · asked by Anonymous in Astronomy & Space

Use differentials to estimate the amount of paint needed to apply a coat of paint 0.07 cm thick to a hemispherical dome with diameter 54 m.

don't know what formula to use...

2007-10-28 07:16:59 · 1 answers · asked by syem64 2 in Mathematics

611 N. Mountain Road
Harrisburg, PA 17112

2007-10-28 07:13:28 · 10 answers · asked by hot_vampire_pink 1 in Geography

Can someone pls explain to me what a sacromere is and what its function is.

2007-10-28 07:11:03 · 9 answers · asked by damigurl05 1 in Biology

Name Something that you "_eat_" that doesn't get it's energy from the sun. It can only be one thing.

For example: Gum can't be one because gum is from cows and cows eat grass and grass get it's energy from the sun.

Or...: fish can't be one either because fish eat algae and algae is a plant and get's it energy from the sun.

you know what I mean????

2007-10-28 07:09:45 · 7 answers · asked by Animosity 3 in Physics

Do they get upset and stuff?

2007-10-28 07:09:34 · 14 answers · asked by Anonymous in Zoology

Show that the SI units of the force constant of a spring can be written as Kg/s^2?

2007-10-28 07:07:43 · 5 answers · asked by stang16041 1 in Physics

and Do the fructose can move in TLC (sol. n-Butanol:acetic acid :watwr =4:1:1)

2007-10-28 07:07:21 · 1 answers · asked by Anonymous in Chemistry

2007-10-28 07:06:46 · 13 answers · asked by Anonymous in Zoology

what is the difference between the endpoint and the equivalence point of a titration???

2007-10-28 07:01:19 · 1 answers · asked by NEEDs MATH HELP!! 1 in Chemistry

2007-10-28 07:00:39 · 3 answers · asked by muzahid_khan_10 1 in Engineering

I know its prob to clean it, but more details please.

2007-10-28 06:58:18 · 5 answers · asked by ****** 2 in Earth Sciences & Geology

This is a neat little trick that will always give you the last 7 digits of your phone number always! So grab your calculators!

1. Key in the first three digits of your phone number. (No area code.)
2. Multiply by 80
3. Add 1
4. Multiply by 250
5. Add the last 4 digits of your phone number.
6. Add the last 4 digits of your phone number again.
7. Subtract 250.
8. Divide by 2.

Pretty cool, huh?
Explain to me algebraically how this works.

2007-10-28 06:57:20 · 6 answers · asked by Michael 2 in Mathematics

2007-10-28 06:55:59 · 21 answers · asked by deetra w 1 in Mathematics

state whether you think they are good or bad please

2007-10-28 06:54:36 · 1 answers · asked by greenpink413 2 in Chemistry

2007-10-28 06:53:00 · 8 answers · asked by DEBBIE C 2 in Mathematics

I need to set up quadratic equations for these three word problems.. (that are solveable by finding the x-intercepts).

please help.. I have a test tomorrow.
=[

1) The director of a local preschool plans to enclose a rectangular area for a playground. One side will be the side of the building. If 60 ft. of fencing are to be used, what is the maximum area that can be enclosed?

2) What are the dimensions or a rectangle having the greatest area with a perimeter of 20 feet?

(as you can tell, those first two are pretty similar, so if you can do just one, I can probably figure out the other one.)

and 3) What is the largest value that can be obtained by multiplying two real numbers whose sum is three? Round your answer to the nearest hundredth.

Thanks in advance..

2007-10-28 06:51:47 · 5 answers · asked by lady. 2 in Mathematics

2007-10-28 06:51:20 · 1 answers · asked by Anonymous in Earth Sciences & Geology

Paranormal activity has always been pretty recurrent around my house. We've had shadowy figures, I've heard things that no one else can hear, and wierd stuff has happened. Lately, however, its become worse. For the past week or so, there have been tappings at windows, thuds on the staircases of my house, my cats have been hissing for no reason, even my dogs are having nightmares, there have been thuds and bangs outside, and my mom and I have been hearing things. Also, there has been a sense of something prowling, I guess, outside. My little brother and sisters have had nightmares that they can't remember much about, other than they involve shadowy people, and they've also experienced the tapping and thuds. Is my house full of crazys, or do we need to call someone, because last night, someone knocked at the door and no one was outside. I'm getting pretty freaked out.

2007-10-28 06:49:17 · 42 answers · asked by cowboy_bebop_ed2000 3 in Paranormal Phenomena

2007-10-28 06:49:09 · 1 answers · asked by Mary H 1 in Botany

I'm having some trouble setting up the vectors needed to solve for the area of a parallelogram

The vertices are K(1,2,3) L(1,3,6) M(3,8,6) N(3,7,3)

I should be able to reduce these down to a 2x2 matrix, correct?
If so, which vectors do I need to use? Would it be something like vector LM and vector KN?

Thanks

2007-10-28 06:41:31 · 3 answers · asked by Defcon6 2 in Mathematics

There are 20 pencils in a box, a mixture of green, red and blue.

If there are 9 red and 5 blue how many green ones are there?

Are there any mathematicians out there who can give me the answer and how you arrived at it?

I've been working on this for several hours and it's giving me a headache.

Many thanks :-)

2007-10-28 06:41:31 · 30 answers · asked by Ms Minger 3 in Mathematics

f(x)=x-2x^2

and also when f(x)=1/3x

2007-10-28 06:40:07 · 1 answers · asked by lovebird 3 in Mathematics

I live in midwestern US. My calander says DST ends today, October 28,2007. My computer auto updated it for today as well. Yet all the other calanders and websites says US time switch is next sunday November 4, 2007. When is it really or is this all just an elaborate hoax to make me think I'm crazy? Or did my computer and calander turn brittish on me? lol

2007-10-28 06:37:57 · 3 answers · asked by johnsmom326 3 in Other - Science

3pages long

2007-10-28 06:36:39 · 5 answers · asked by cocolocogirl357 1 in Botany

What is the internal energy change for the system if 883 joules of heat flows FROM the system into the surroundings and 365 joules of work is DONE on the system by the surroundings?

my answer was this, but the system where we submit our answers tells me that it's wrong!!

delta u = q + w
= 883 + (-365)
= 518 J

isn't that correct???

2007-10-28 06:33:50 · 2 answers · asked by Curious 1 in Chemistry

2007-10-28 06:30:54 · 5 answers · asked by MeDIGURU 1 in Physics

A bomb calorimeter has a heat capacity of 843 J/°C and contains 473 g of water. If the combustion of 0.500 mole of a hydrocarbon increases the temperature of the calorimeter from 22.73°C to 26.95°C, determine the heat evolved per mole of hydrocarbon.

A. 8.38 kJ
B. 23.8 kJ
C. 76.0 kJ
D. 95.9 kJ
E. 8380 kJ

2007-10-28 06:30:37 · 3 answers · asked by desigoddess217 1 in Chemistry

A ditch 2.29 m wide crosses a trailbike path. An upward incline of 15.5 degrees has been built up on the approach so that the top of the incline is level with the top of the ditch. What is the minimum speed (in m/s) at which a trailbike must be moving to completely clear the ditch? (Add 1.52 m to the range for the back of the bike to clear the ditch safely.)

2007-10-28 06:30:24 · 1 answers · asked by ags101 2 in Physics

2007-10-28 06:26:55 · 8 answers · asked by Josh j 1 in Mathematics