Science & Mathematics - 15 September 2007

I want to know how vary the electrical field intensity in a point of space when an antenna receive that signal or not.

2007-09-15 10:51:23 · 1 answers · asked by ecosierra51 2 in Engineering

If so, can they be harmful to humans? ........(not the poisonous variety)

2007-09-15 10:51:00 · 10 answers · asked by Tango 7 in Zoology

Other than developing a resistance to the insecticide, could you tell me why this happens?

2007-09-15 10:49:33 · 2 answers · asked by Anonymous in Biology

If a microorganism were swimming from right to left across your field of view under a compound light microscope, which way would you move the microscope slide to keep it in view?

And what about if you were viewing it from a stereo microscope, which would you move it????

2007-09-15 10:44:04 · 1 answers · asked by Miche12x 2 in Physics

2007-09-15 10:43:52 · 4 answers · asked by Anonymous in Chemistry

How many minutes does it take for light to reach the earth from the sun, which is 1.5 X 10 (to the eleventh power)m away?

2007-09-15 10:41:19 · 4 answers · asked by TwiggyRamirez 2 in Mathematics

(a) 2/5,3/5
(b) 5/8,7/8

How do you solve these problems?

2007-09-15 10:39:53 · 5 answers · asked by Kris 1 in Mathematics

How does the volums of a gas relate to the composition of an unknown?? im so lost.....

2007-09-15 10:39:48 · 1 answers · asked by diamond 3 in Chemistry

2007-09-15 10:39:02 · 1 answers · asked by Miche12x 2 in Physics

2007-09-15 10:37:30 · 8 answers · asked by TwiggyRamirez 2 in Mathematics

you borrowed $529 from your parents and they want u to repay them back as soon as possible. you can pay them back $20 a week. how long will it take u to repay ur parents?

2007-09-15 10:36:48 · 5 answers · asked by ? 2 in Mathematics

x + 3y= 12
4x - y = -17 is

a. (3, 3)
b. (12, -17)
c. (-3, 5)
d. (5, 3)

2007-09-15 10:35:08 · 2 answers · asked by Anonymous in Mathematics

NaBr + Ca(NO3)2 ---->?
NaBr + AgNO3 ---->?
NaBr + AgNO3 + NH3 ---> ?
NaBr + AgNO3 + Na2S2O3 ---> ?
NaBr + C6H10O5 + NaOCl----->?

I'd really appreciate if you can complete the equations and help me with the observations. I have a test on monday and its suppose to be the hardest test of the year. I'll fail if i dont get this information.

2007-09-15 10:34:20 · 2 answers · asked by ndnchemidiot 1 in Chemistry

if the temperature is C degrees, it is 9/5 C+32 degrees Fahrenheit . What is the Fahrenheit if the Celsius temperature dropped 5 degrees?

2007-09-15 10:32:22 · 4 answers · asked by ѕαℓωα 2 in Mathematics

Solve the system of equations by substitution:

4x - 3y = 1
12x - 9y = 3

2007-09-15 10:28:37 · 4 answers · asked by Anonymous in Mathematics

I am going to major in aerospace engineering(for spacecraft, not airplanes) and was wondering if an a&p license would allow more job opportunities or better pay

2007-09-15 10:28:35 · 2 answers · asked by Anonymous in Engineering

Solve the system of equations by substitution:

x + 2y = 9
3x - y = 13

2007-09-15 10:27:56 · 6 answers · asked by Anonymous in Mathematics

1. plasma
2. fluid between cells
4. lymph
5. all of the above are components of the ECF.

2007-09-15 10:25:57 · 3 answers · asked by Rori S 1 in Medicine

If I have 30 squared meter area CUBIC surface enclosing a point charge, and the question ask me to find the Flux generated on the surface, is it possible for me to use a 30 squared meter area SPHERICAL surface in my calculation instead because it is easier to integrate and taken the fact that the Flux generated by this one point is a constant?

I know you can also do Q/epsilon to get the Flux, but would the above method get the same answer too?

2007-09-15 10:23:54 · 2 answers · asked by Anonymous in Physics

2007-09-15 10:22:32 · 25 answers · asked by Anonymous in Weather

∫ (x^3/(square root of 16-x^2) ) dx
∫ (1/(square root of x^2+2x+2)) dx
∫ (x/ e^2x)dx
∫ (e^square root of x) dx
∫ ((x-9) / (x^2 + 3x - 10)) dx

thanks!

2007-09-15 10:21:32 · 3 answers · asked by Lakeshow2x12 4 in Mathematics

Two point charges are placed on the x axis. The charge +2q is at x = 1.5 m, and the charge -q is at x = -1.5 m.

(a) There is a point on the x axis between the two charges where the electric potential is zero. Where is this point?
x =.... m

(b) The electric potential also vanishes in one of the following regions. Identify the appropriate region.
1. Region 1: 5.0 m > x > 1.5 m
2. Region 2: -1.5 m > x > -3.0 m
3. Region 3: -3.5 m > x > -5.0 m

(c) Find the value of x referred to in part (b).
x = ........m

2007-09-15 10:20:06 · 1 answers · asked by ? 1 in Physics

I want to test the consciousness of plants. I am looking to buy four plants...two I will pet, kiss and water...and two I will just water regularly.

I need a plant that is less resilient...with a short life span...so I'm not waiting years to get my results. I live in New York.

2007-09-15 10:19:43 · 4 answers · asked by LUCKY3 6 in Botany

and then charging it?

For long-term longevity of the battery.

2007-09-15 10:19:30 · 6 answers · asked by Anonymous in Engineering

2007-09-15 10:19:25 · 27 answers · asked by jerbal 1 in Astronomy & Space

A typical 12 V car battery can deliver 6.0 105 C of charge. If the energy supplied by the battery could be converted entirely to kinetic energy, what speed would it give to a 1400 kg car?

.....m/s?

2007-09-15 10:18:17 · 2 answers · asked by ? 1 in Physics

ok,here's the scoop:
1. I am a honors student with a 4.0 since 4th grade.
2. I don't know what to sudy
3. I don't know how long it will take to complete this
4. Hopefully I'm going to Oxford Academy High School the 8th best in the country
5. And I need help
6. please no rude names for my feeling get hurt eaisly


HHHHHHHHHHEEEEEEEEELLLLLLLLLLLLPPPPPPPP

2007-09-15 10:17:33 · 11 answers · asked by Anonymous in Medicine

AN OLYMPIC jumper leaves the ground at an angle of 23 degrees and travels through the air for a horizontal distance of 8.7m before landing. What is the take off speed of the jumper?

2007-09-15 10:17:29 · 2 answers · asked by Anonymous in Physics

can they give birth normally? or will they have to have a C section because of Thier diabetic condiotion?

2007-09-15 10:15:55 · 7 answers · asked by S i r i 1 in Medicine

2007-09-15 10:15:24 · 3 answers · asked by Brandon W 1 in Mathematics