Science & Mathematics - 23 October 2007

2007-10-23 07:30:57 · 3 answers · asked by brewer37 1 in Earth Sciences & Geology

2007-10-23 07:30:31 · 3 answers · asked by stevo 1-2 1 in Engineering

http://img221.imageshack.us/img221/8995/fzksmg3.jpg

2007-10-23 07:30:30 · 2 answers · asked by Ariel 2 in Physics

2007-10-23 07:29:37 · 7 answers · asked by Anonymous in Biology

One circle has a center (0,4) and a radius of 5 the other has a center (0,-5) and a radius of 7. The x coordinates of the points of intersection of the two circles are.
(x1,x2)

2007-10-23 07:29:07 · 3 answers · asked by ws 3 in Mathematics

2007-10-23 07:29:02 · 1 answers · asked by Anonymous in Mathematics

2007-10-23 07:25:54 · 2 answers · asked by Anonymous in Mathematics

The problems are
What operation in arithmetic represents each of the following?
1) Decreased by
2)sum of
3)increased by

The second problem is
A car rental agency charges $40 per day and $0.20 a mile for each mile over 100 miles. If the charge for one day rental was $70, how many miles was the car driven?
How do you write an equation to solve this problem?
Write and solve this equation.
Is the solution of this equation of the solution of the problem? Why?

THANKS IN ADVANCE!

2007-10-23 07:25:24 · 4 answers · asked by babygirl 1 in Mathematics

A=
0 1
-1 1
Calculate A^2=

A^3=

A^1660=

2007-10-23 07:20:27 · 3 answers · asked by Anonymous in Mathematics

what does unpaired electron mean

plz explain

2007-10-23 07:20:03 · 3 answers · asked by mike m 1 in Chemistry

2007-10-23 07:17:38 · 2 answers · asked by Buffy 2 in Zoology

The center of gravity of the car is between the front and rear tires, and the horizontal distance between the center of gravity and the front axle is 1.02 m.

(a) Determine the normal force that the ground applies to each of the two front wheels

(b) Determine the normal force that the ground applies to each of the two rear wheels.

2007-10-23 07:15:55 · 2 answers · asked by Anonymous in Physics

How can someone have more than 30% best answers? Thats insane.

2007-10-23 07:15:51 · 8 answers · asked by pohlusky 2 in Geography

Such as Turtles, they have use of the beahes as they come ashore to lay there eggs.

2007-10-23 07:14:21 · 3 answers · asked by Anonymous in Biology

I have two Denver Instrument pH probes that have formed crystals inside of them. The liquid inside them before it crystalized was a 3M KCl solution (potassium chloride). Can someone please give me some ideas on how to dissolve the KCl inside, these are expensive probes and I'd like to be able to salvage them. Thanks for any help!!! Cheers.

2007-10-23 07:13:58 · 4 answers · asked by Anonymous in Chemistry

A. if p = q is a true conditional and p is true, then q is true

B. if p = q and q = r are true conditionals, then p = r is true

C. if a, b, and c are real numbers, then a(b + c) = ab+ac

D. NONE OF THEESE

?? thanks 4 the help

2007-10-23 07:11:20 · 4 answers · asked by home_ed05 1 in Mathematics

There are those stickers in America saying 'Have you thanked a green plant today?' and I was wondering- why do we have to thank them? =]

2007-10-23 07:10:00 · 3 answers · asked by ♥ a o i f e ♥ 3 in Botany

a. if a vehicle had four wheels, then it is a car
b. if a vehicle is a car, then it has four wheels
c. if a vehicle is not a car, then it does not have four wheels.
d. NONE OF THEESE?

help please thanks!

2007-10-23 07:01:29 · 3 answers · asked by Anonymous in Mathematics

1) -8 - 3 x 7 - 4 / -2(-3 - 7 ÷ (-6 + 2))

I got -33/2.5 according to my TI-83.


2) -6√x + 1 - 4y^2 when x = 24 and y = -1

I got -5.

2007-10-23 07:00:55 · 5 answers · asked by starscream 1 in Mathematics

2007-10-23 07:00:37 · 4 answers · asked by screaming_eagle_babe05 1 in Botany

How many 5 digit telephone numbers are there that do not have '75' in that order in any place in the number? (assume a telephone number can start with 0)

2007-10-23 06:59:47 · 6 answers · asked by Anonymous in Mathematics

Question was to find general solution of dy/dx = (4x+2y-1)^1/2

This is what I did: let z = 4x + 2y -1 therefore z'=4+2y' => y' = z'/2 - 2
Substitute to get z'/2 - 2 = z^(1/2) => z' = 2*z^(1/2) + 4 (A Bernouilli Equation) Dividing thru by z^(1/2) gives

z^(-1/2) * z' = 2 + 4*z^(-1/2)

Now say m = z^(-1/2)
=> m' = (-1/2)*z^(-3/2) => m' = (-1/2)*z^(-1/2)*z^-1
=> 2*m' = -m*z^-1
=> 2*m'/m = z^-1

Now integrating both sides gives

2 ln m = ln z + c

Does this look right? Where do I have to go from here?

2007-10-23 06:55:34 · 2 answers · asked by Unoticed 1 in Mathematics

So, I'm a high school senior and it's crunch time now with all the college major decisions. I've always wanted to be a doctor...speacialist actually (anesthesiologist) However, I never really had an A in CHemistry and although, I'm ok at science...Science isn't my passion...I do want to be an anesthesiologist though. I also hear only 10% of premed students make it into Med School anyway which tends to discourage me. I'm not so excited with the idea of having to choose a different major ,but I guess I might have to think about that. Any advice.

2007-10-23 06:53:14 · 8 answers · asked by ELECTRA 1 in Medicine

A wiehgt lifter can lift 150kg vertically at a constant speed to a position 2m over his head.

so because he is lifting it at a constant speed, when you draw the free body diagram, you know that the normal force and the weight should be the same (due to equilibrium). So does that mean if you get the sum of the work done by the weight and the normal force, it should be ZERO?

2007-10-23 06:49:06 · 6 answers · asked by Anonymous in Physics

they want me to prove that the Limit as "x" approaches 0 for x^3cos(1/x) is equal to zero...i'm kind of confuse can someone give me a detailed explanation on how to prove this using the Squeeze Theorem?

2007-10-23 06:48:25 · 5 answers · asked by none 1 in Mathematics

Solve:
4^(x-1) = 7

2007-10-23 06:47:05 · 11 answers · asked by pearlnruby89 1 in Mathematics

conjecture: If the sum of two intergers is even, then both the intergers are even.

a. 14+9=23
b. 6+10=16
c. 3+9=12
d. none of theese

thanks 4 the help

2007-10-23 06:47:00 · 3 answers · asked by Anonymous in Mathematics

express in form a(x-h)^2+k

2007-10-23 06:44:59 · 1 answers · asked by icygurl205 1 in Mathematics

How many 6 letter words could be made from set A={a,b,c,d,e} without using the letter 'a' ?

2007-10-23 06:44:50 · 1 answers · asked by Anonymous in Mathematics

We know that we don't need the appendix but is there anything else?

2007-10-23 06:39:25 · 21 answers · asked by MARK S 1 in Biology