Science & Mathematics - 9 November 2007

2007-11-09 05:43:04 · 2 answers · asked by linthachil 1 in Mathematics

2007-11-09 05:42:43 · 2 answers · asked by Anonymous in Physics

By how much intensity of the light that passes through will change if third polarizer is inserted between them at angles 30° to both polarizers.

2007-11-09 05:38:59 · 1 answers · asked by Alexander 6 in Physics

2007-11-09 05:35:16 · 20 answers · asked by Anonymous in Astronomy & Space

covalent bond Explain Electronegativity? What is the difference between a polar covalent bond and a nonpolar?

2007-11-09 05:34:23 · 4 answers · asked by Anonymous in Chemistry

An object with weight W is dragged along a horizontal plane by a force acting along a rope attached to the object. If the rope makes an angle A with the plane, then the magnitude of the force is:
F= uW / ( u sinA + cosA)
where u is a positive constant and where 0 <=A<=pi/2.
Show that F is minimized when tanA =u.

Thank you!

2007-11-09 05:34:14 · 3 answers · asked by jeremy s 2 in Mathematics

2007-11-09 05:31:46 · 1 answers · asked by Anonymous in Engineering

I get confused about how to do the equation 3x+y=3, would it be y=-3x+3? and what number can I use in order to plug in, can i use 0, 4, and -4. Thank you very much

2007-11-09 05:29:13 · 10 answers · asked by bug 2 in Mathematics

A simple pendulum with a length 1.50 m makes 81.6 oscillations in 180 s. What is the acceleration due to gravity at its location? (It is not located on Earth!)

2007-11-09 05:29:12 · 3 answers · asked by Anonymous in Physics

2007-11-09 05:28:32 · 1 answers · asked by Insanely Curious 1 in Astronomy & Space

-What is the buoyant force on the object?
-Will this object float or sink? Explain your answer.

2007-11-09 05:25:29 · 3 answers · asked by Anonymous in Physics

2007-11-09 05:18:46 · 6 answers · asked by mark r 2 in Astronomy & Space

2007-11-09 05:16:59 · 18 answers · asked by mr perfect 4 in Physics

Suppose X is a rational number. Can you prove that X^X is irrational unless x is an integer?

2007-11-09 05:15:26 · 2 answers · asked by Christine P 5 in Mathematics

x^2+13x+12=0

2007-11-09 05:14:04 · 3 answers · asked by Maggie L 1 in Mathematics

If the merry go round starts at rest and aquires an angular speed of 0.0870rev/s in 3.50s what is its mass?

2007-11-09 05:10:39 · 1 answers · asked by luawaikuuipo 1 in Physics

2007-11-09 05:09:53 · 7 answers · asked by Anonymous in Physics

q and w for the following exothermic process at P = 1 atm and T = 370 degrees kelvin?

a) q and w are negative

b) q is negative, w is positive

c) q is positive, w is negative

d) q = 0, an adiabatic process

e) q and w are both positive

2007-11-09 05:09:32 · 1 answers · asked by 41 1 in Chemistry

lim 13 x e^(1/x) −13 x
x -> infinity

Evaluate the limit

2007-11-09 05:08:33 · 4 answers · asked by Lauren 1 in Mathematics

the other end. Where should a 1.80kg container of orange juice be placed so that the basket balances at the center?

2007-11-09 05:07:50 · 1 answers · asked by luawaikuuipo 1 in Physics

2007-11-09 05:04:18 · 4 answers · asked by twizzlas 2 in Chemistry

one end. a)where should a parent push vertically downward with a force of 210N in order to hold the teeter totter level? b) where should the parent push with a force of 310N? c) How would you answer to parts a and b if the mass of the teeter totter was doubled.

2007-11-09 05:01:47 · 1 answers · asked by luawaikuuipo 1 in Physics

Determine the numerical form of each of the ordered pair forms in the trigonal array which follow and arrange your results in a corresponding trigonal array. (each # on top of another are in the same longer parenthesis. thanks!
(0)
(0)

(1) (1)
(0) (1)

(2) (2) (2)
(0) (1) (2)

(3) (3) (3) (3)
(0) (1) (2) (3)

(4) (4) (4) (4) (4)
(0) (1) (2) (3) (4)

(5) (5) (5) (5) (5) (5)
(0) (1) (2) (3) (4) (5)

(6) (6) (6) (6) (6) (6) (6)
(0) (1) (2) (3) (4) (5) (6)

2007-11-09 04:58:23 · 2 answers · asked by numbr1TXfan 4 in Mathematics

I need help. Please explain. I'll give out points.

THANKS!!

2007-11-09 04:58:22 · 5 answers · asked by Anonymous in Geography

-/25x^6 y^16

and YES the Negative Sign - has NO number or variable with it...

2007-11-09 04:57:51 · 4 answers · asked by ♥ ღAngelicaღ♥ 2 in Mathematics

3x ^ 3/4

2007-11-09 04:55:55 · 3 answers · asked by ♥ ღAngelicaღ♥ 2 in Mathematics

2007-11-09 04:55:54 · 40 answers · asked by Scando Fonz 4 in Biology

The telescope that I got as a gift is a Keplerian type (all eyepieces are convex) resulting in an inverted (mirror) image of the objects I'm looking at. Is there a practical reason why these telescopes are not all by default corrected with a third lens? Apparently a prism can be purchased for that purpose to correct terrestrial images. Is it then widely accepted for celestial sights to be displayed inverted?

2007-11-09 04:55:10 · 5 answers · asked by Adrian 1 in Astronomy & Space

1a)express x^2 - 6x + 7 in the form (x+a)^2 + b, finding the values of a and b

1b) find the range of values of x for which x^2 - 6x + 7 is less than 0

2a) express x^2 + 4x -5 in the form (x+a)^2 + b, finding the values of the constants a and b

2b) find the values of x for which x^2 + 4x - 5 is greater than 0

2007-11-09 04:54:04 · 1 answers · asked by Anonymous in Mathematics

can you calculate lim ( ( x - sin x )/x^3 ) when x-> 3 without using McLauren series or hopital rule ?

2007-11-09 04:52:19 · 4 answers · asked by Anonymous in Mathematics