Science & Mathematics - 20 November 2007

2007-11-20 12:08:08 · 9 answers · asked by betterthanjesus3 1 in Astronomy & Space

The Rocket Ship
A rocket ship is to go from Earth to Planet X. It is a five-day trip, but the rocket holds only enough fuel for 3 days’ flight. Fuel stations 1, 2, and 3 are 1, 2, and 3 days’ flight from Earth respectively. The fuel stations are empty, but Earth has an unlimited supply of fuel. The rocket ship can leave fuel at stations 1, 2, and 3. What is the minimum number of days required to reach Planet X from Earth?

2007-11-20 12:05:26 · 1 answers · asked by Anonymous in Other - Science

2007-11-20 12:05:08 · 10 answers · asked by Anonymous in Geography

2007-11-20 12:04:23 · 8 answers · asked by ~*_*~i_like_cheesy_pie~*_*~_PIE! 2 in Chemistry

Alright I am in Chemistry preparing for a test and having some problems with my calculator.

Okay so here is the problem:
E=hc/lamba=(6.626 x 10^ -34 J-S) x (2.998x10^8 m / 1) x ( 1 / .154 nm) x ( 1nm / 1 x 10^ -9 m) = 1.29x10^ -15 J

I am coming out with 1.29 x 10^ -16 J

I have put it in there 5 times and done different problems and am always 1 power short. on every one of them Is it screwed up? I cant imagine 20 problems being wrong and me putting it in wrong that many times.

Btw I checked the problem I just typed in twice. It is correct.

2007-11-20 12:03:08 · 1 answers · asked by Reviction 1 in Mathematics

The world population is expanding at a very fast rate and is not expected to even out until the next century. Considering the world is getting heavier every second, it is conceivable that it will eventually surpass the mass of the earth.
Will the population of the world become the same as the earth? What might happen then?

2007-11-20 11:50:58 · 12 answers · asked by Anonymous in Physics

how hot can it be?....enough to immediately scorch and burn the skin?....enough to completely engulf and consume at once....?
will one instantly die? and how close can one get to a fiery wildfire? O.o

is it possible? does it happen? has anyone tried it and lived to tell?

2007-11-20 11:48:12 · 6 answers · asked by Anonymous in Other - Science

2007-11-20 11:48:02 · 2 answers · asked by Rachel P 1 in Physics

I need to build a robot that has to pick up things and has to be some what fast. I need to build and arm but how?? and if you have any tips please telll me. i also can not make the robot with tires or legos, if u have any ideas plz tell me.

2007-11-20 11:44:42 · 3 answers · asked by x_we_fly_high_x 2 in Engineering

Is this even a valid question? If a star emits some photons, it has effectively transferred some of it's energy into light right? Now, this energy may spend eons tied up in a photon so as long as it does not hit anything. Does this happen? If so, does this represent a significant ammount of energy?

2007-11-20 11:44:35 · 1 answers · asked by Nick D 2 in Astronomy & Space

What's the formula for newton's third law?

2007-11-20 11:43:22 · 2 answers · asked by Lala! 1 in Physics

the mri was done on my neck. my neck is still and my legs are stiff causing me to walk with a limp thanks

2007-11-20 11:42:42 · 6 answers · asked by Anonymous in Medicine

2007-11-20 11:41:52 · 8 answers · asked by camphec63 2 in Mathematics

2007-11-20 11:40:03 · 7 answers · asked by kinghout28 2 in Physics

2007-11-20 11:38:54 · 12 answers · asked by Anonymous in Mathematics

2007-11-20 11:37:13 · 4 answers · asked by chargergirl_06 1 in Chemistry

2007-11-20 11:35:45 · 4 answers · asked by frankie c 2 in Biology

If a positive number is multiplied by 9 then subtracted from the square of the number the result is 10. Find the number.
I think the equation is;
x^2 - 9x = 10
Word problems are not my strongest math skill but with help I will get there.

2007-11-20 11:35:02 · 3 answers · asked by seed2ofchuck 2 in Mathematics

2007-11-20 11:29:05 · 1 answers · asked by Mark 2 in Chemistry

You've seen them in games, television shows and movies, gigantic "battleships" or spaceships if you will. Is it even remotely possible? Take the space variable out of it and given that we have "thrusters" to move it and the fact of it's massive size, won't it take years just to complete one? And the resources, do we even have enough? What about the required amount of people just to keep it running? I'm sure there are other problems that prevent it from becoming possible but I can't think of them right now, what do you think, possible or not?

2007-11-20 11:29:05 · 1 answers · asked by troyk 1 in Physics

Find the surface area and volume of the solid pictured below which is the composite of a right rectangular prism and a square pyramid with a height of 3.

http://tinypic.com/view.php?pic=85lnfav&s=1

2007-11-20 11:28:24 · 1 answers · asked by Anonymous in Mathematics

1/Picture link:http://img128.imageshack.us/my.php?image=heatsinktx7.jpg
We would like to maximize the area of the cooling fins in order to maximize cooling, but the board have an area of 40 cm2 .Find the dimensions of the board that would maximize the cooling provided by the fins.
2/picture:http://img116.imageshack.us/my.php?image=cellphonetowerssx2.jpg
Where should those towers be situated in order that the direct line-ofsight distance between them be least?
plz answer clearly.

2007-11-20 11:28:02 · 2 answers · asked by minu 2 in Mathematics

a circle is not straight, is a square?

2007-11-20 11:27:28 · 5 answers · asked by miked 1 in Other - Science

what is the mode of: $1.67, $1.29, $0.70, $1.29, $0.89, $0.89, $0.79, $1.67, $0.79, $0.57, $0.79?

2007-11-20 11:27:15 · 6 answers · asked by Anonymous in Mathematics

Any help would be appreciated.

2007-11-20 11:26:13 · 4 answers · asked by Anonymous in Chemistry

2007-11-20 11:22:49 · 1 answers · asked by Anonymous in Mathematics

I need help!!

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

How would you solve this equation?

4y+(2x+y)+(79-x)

Please explain too. Thanks!

2007-11-20 11:20:50 · 6 answers · asked by b 5 in Mathematics

how long does it last? Has anyone ever experienced being in it? Is it different from the "calm before the storm"?

2007-11-20 11:20:02 · 8 answers · asked by butterworth1812 2 in Weather

uGh! I have the most useless homework in math and I don't know when I'll EVER need to use some of this stuff in the real world. I know you need the basics, like adding and multiplying and all that, and how to measure and maybe fractions & percents. But seriously when will you ever need to know how to graph using slope intercept form or solve huge equations??
Anyone agree with me here?! =P

2007-11-20 11:18:49 · 10 answers · asked by LOL xX 2 in Mathematics