Science & Mathematics - 14 October 2007

magnetic line of force

2007-10-14 17:05:58 · 3 answers · asked by tata 1 in Physics

x + y = 4
–x + y = 2



Thanks in advance for any help at all on this one!

2007-10-14 17:05:57 · 2 answers · asked by yeahyeahyeah 4 in Mathematics

Why is normal inspiration an active process and expiration a passive process?

Also, I'm looking for an anatomy/physiology tutor. Will pay by hour, email tuturing

email me...if interested jerkkchicken@yahoo.com

2007-10-14 17:01:55 · 4 answers · asked by jay t 1 in Medicine

find the derivative

2007-10-14 17:00:39 · 5 answers · asked by Anonymous in Mathematics

2007-10-14 16:55:51 · 7 answers · asked by Anonymous in Geography

I want to know what is "to frequently" with this drug... like it's okay to take how many nights a week, months?

thanks

2007-10-14 16:54:12 · 3 answers · asked by beachbum7 3 in Medicine

Here is the LED
http://www.lsdiodes.com/shop/index.php?main_page=product_info&products_id=28

and here is the list of available resistors
http://www.lsdiodes.com/shop/index.php?main_page=product_info&cPath=10&products_id=68

I guess while we're talking about circuits, does anyone have an affordable soldering iron that they could recommend.

Thanks!

2007-10-14 16:53:41 · 1 answers · asked by X6B7A 2 in Physics

2007-10-14 16:51:03 · 5 answers · asked by Mary L 2 in Mathematics

Hi everyone, I'm sorry to ask the community for help but Algebra is killing me and if someone could give me a hand with this one I would greatly appreciate it.

Also, I'm practicing and going to start doing tutoring because I really want to learn how to do this one my one. But need some help on the fly if someone would be so kind.

Factor completely. 2b^2 + 7ab + 3a^2

2007-10-14 16:47:15 · 5 answers · asked by Jane S 1 in Mathematics

Does anyone know if worms have external fertilisation or internal fertilisation? Also, is their reproduction sexual or asexual? Thanks!

2007-10-14 16:42:39 · 1 answers · asked by Rozyyy 1 in Biology

2007-10-14 16:42:11 · 6 answers · asked by Nap 1 in Mathematics

I have to find the directional derivative of f(x,y) = x^2 + 4y^2 at P = (3,2) in the direction pointing to the origin.

do I have to find a vector u, in the direction pointing to the origin? how do I find this vector?

2007-10-14 16:41:52 · 1 answers · asked by Anonymous in Mathematics

You have to factor, if possible. I can't figure it out.

2007-10-14 16:41:08 · 5 answers · asked by Jessica W 1 in Mathematics

2007-10-14 16:41:03 · 5 answers · asked by . 1 in Mathematics

2007-10-14 16:38:54 · 3 answers · asked by jackguy_17 1 in Astronomy & Space

2007-10-14 16:38:26 · 3 answers · asked by Anonymous in Mathematics

this is the problem...q=2.5x10^-6 moving 500m/s in direction 30degNoE. At location of particle, B=0.4T. Particle experiences instantaneous magnetic Force due to field, F= 1.71x10^-4 N at 60degWoN. What is the size of the angle between the velocity vector and the magnetic field at the location of the particle? What is the direction of magnetic field? I don't know what to do. I am starting with finding the vector components. Is the 500m/s the "r" value for the velocity vector? I'm stuck there. If I start with components of force vector, how can I tell which components of velocity vector are perpendicular to the Force and B vectors. Do I include all vector components in the cross product, or just the perpendicular components? Please help me.

2007-10-14 16:37:41 · 1 answers · asked by Stephanie L 1 in Physics

can somebody help me please

2007-10-14 16:37:01 · 4 answers · asked by dineta d 1 in Mathematics

(v/v+5) + (1/v-4) = 1....?

2007-10-14 16:36:21 · 4 answers · asked by Jay-j 2 in Mathematics

Can some one tell me how to use it, give an example, I don't understand the way the manule explains it.

Thanks.

2007-10-14 16:34:58 · 1 answers · asked by Anonymous in Mathematics

Do you think Space-Based Solar Power is possible?
why/why not?

http://www.nss.org/settlement/ssp/library/nsso.htm

2007-10-14 16:33:48 · 5 answers · asked by Philip Augustus 3 in Astronomy & Space

x/6 - x/4 = -8?

2007-10-14 16:33:47 · 4 answers · asked by Jay-j 2 in Mathematics

Within the last three years an Asteroid the size of a football field passed over the earth by sixty miles in Northern America.What scale of impact would we feel on earth? How much damage would this have done to our ailing environment?
Name three well known disasters that would take affect?

2007-10-14 16:33:02 · 2 answers · asked by Anonymous in Astronomy & Space

2007-10-14 16:31:59 · 1 answers · asked by hc100 1 in Mathematics

2007-10-14 16:31:56 · 2 answers · asked by Anonymous in Mathematics

how do we know the Sun is not at the center of the Milky Way Galaxy?

2007-10-14 16:28:11 · 16 answers · asked by jared c 1 in Astronomy & Space

a 50.5 kg traffic light hangs from two cables which are at the angles shown.Calculate the tensions in the two cables.
http://i219.photobucket.com/albums/cc83/melan520/10-14-07_1249.jpg

2007-10-14 16:26:42 · 1 answers · asked by ? 2 in Physics

I think i got the right answer
heres the problem

solve using complex number and completing the square

(w-1)^2=9 .............................^2= 2 squared

2007-10-14 16:26:33 · 1 answers · asked by Hello There 1 in Mathematics

answer needs to be in interal notation meaning using inf and 'cup' symbols.

2007-10-14 16:25:04 · 2 answers · asked by icygurl205 1 in Mathematics

An Instructor and a student are driving. The student is driving 1 and a half times faster than the instructor. At the end of 3 hours the student is 45 miles ahead of the instructor. What is their distance, time and rate. The question is a d=rt (distance=rateX time)

2007-10-14 16:23:50 · 4 answers · asked by buffy5455 2 in Mathematics