Science & Mathematics - 2 December 2007

abstract algebra

2007-12-02 05:48:39 · 2 answers · asked by Anonymous in Mathematics

i know i'm supposed to use differentiation, but how would that work?

2007-12-02 05:45:46 · 5 answers · asked by heynow 2 in Mathematics

im in 9th grade physics...
in the problem you have to find the acceleration due to gravity on neptune... it tells you the mass of the planet and the radius.
what equation do you use??
thanks!

2007-12-02 05:44:58 · 5 answers · asked by hcogirl14 4 in Physics

Is this true of mathematics, that it is a human construct and could be different in a different universe, or is it universal and cannot be any other way.

2007-12-02 05:44:10 · 4 answers · asked by Anonymous in Other - Science

A dancer lifts his 53.6 kg partner straight
up off the ground a distance of 0.373 m before
releasing her.
The acceleration of gravity is 9.8 m/s2

If he does this 22 times, how much work has
he done? Answer in units of J.

thank you in advance for helping ^_^

2007-12-02 05:42:20 · 3 answers · asked by Catalina 2 in Physics

2007-12-02 05:40:03 · 7 answers · asked by Anonymous in Mathematics

2007-12-02 05:35:50 · 3 answers · asked by purarnick 2 in Astronomy & Space

a) term
b)coefficient
c)polynomial
d)linear equation

Please try to keep answers to basic english!! Have tried looking through my Oxford Concise Dictionary of Mathematics and ended up even more confused than i started out! Thanks

2007-12-02 05:33:47 · 2 answers · asked by Perfect-Angel84 2 in Mathematics

2007-12-02 05:32:18 · 2 answers · asked by abhin t 1 in Mathematics

I just found a spider in my house and it's pretty small (~3/4 of an inch) and has a golden pattern on his abdomen and right before his spinnerets is another small, gold pattern. (I live in Quebec; not many venomous spiders)What kind of spider is this??

2007-12-02 05:30:10 · 2 answers · asked by Anonymous in Zoology

2007-12-02 05:30:07 · 3 answers · asked by Mike G 2 in Physics

a) 6.90 x 10(-7)
b) 2.88 x 10(-19)
c) 4.35 x 10(14)
d) 1.45 x 10(-10)
e) 1.04 x 10(27)

2007-12-02 05:30:07 · 3 answers · asked by maybe71400 1 in Physics

Why does the doppler effect occur only if the sound-emitting object is moving relative to the listener?

2007-12-02 05:27:58 · 2 answers · asked by Anonymous in Physics

recently, a scientist in the midwestern United States claimed to have found the largest living organism, a mushroom-bearing fungus in Michigan. How might the scientist know that the mycelia that consitute the body of the fungus, mostly growing below ground, is in fact a single organism?

answer this and be specific because i am stuck for 10 points

2007-12-02 05:27:09 · 5 answers · asked by star baller 360 5 in Biology

hi,

when people talk about a star's brightness and a star's luminosity, what do they mean?

am i right in describing brightness as the number of photons per second reaching us from the star?

and luminosity i have no clue about, just that its related to how massive a star is.

also,

if a star was shining with a bright blue light many, many times brighter than the sun, why would that indicate that this star is younger than the sun? is there any other way that i could determine the relative ages of the stars?

2007-12-02 05:23:39 · 4 answers · asked by fpa06mr 5 in Astronomy & Space

If a vibrating system has total energy E_0, what will its total energy be (in terms of E_0) if you double the amplitude of vibration?

If you want to triple the total energy of a vibrating system with amplitude A_0, what should its new amplitude be (in terms of A_0)?

2007-12-02 05:23:20 · 1 answers · asked by SweetMandy01234 2 in Physics

A cylinder is inscribed in a right circular cone of height 7.5 and radius (at the base) equal to 5. You will be asked to determine the dimensions of such a cylinder which has maximum volume.

a. First, if the radius of such an inscribed cylinder is x, then its height will be (express the cylinder's height as a function of x)

b. Next, give an expression for the volume of the inscribed cylinder in terms of its radius x.

c. Finally, the inscribed cylinder that maximizes its volume will have dimensions:
Height:
Radius:

2007-12-02 05:21:02 · 2 answers · asked by Anonymous in Mathematics

How far (in terms of A) is this mass from the equilibrium position of the spring when the elastic potential energy equals the kinetic energy?

2007-12-02 05:20:30 · 2 answers · asked by SweetMandy01234 2 in Physics

This question is really frustrating me. I would really appreciate help. Thanks!
A flywheel turns through 52 rev as it slows from an angular speed of 2.6 rad/s to a stop
(a) Assuming a constant angular acceleration, find the time for it to come to rest.
(b) What is its angular acceleration?
(c) How much time is required for it to complete the first 26 of the 52 revolutions?

Also, if you could show your work, that would be great. Thanks.

2007-12-02 05:20:01 · 1 answers · asked by Anonymous in Physics

but does not conduct electricity in the solid phase. The substance is most likely

A. a metallic solid

B. an ionic solid

C. a molecular solid

D. a network solid

2007-12-02 05:19:38 · 3 answers · asked by Chris M 1 in Chemistry

I'm doing my science project on the chromotography of skittles(Chromatography means separation of a mixture by means of selective adsorption.) && it's due by this wednesday..but I'm having trouble about how to start of my background research, if anyone can help me I'd really appreciate it.....thanks :)))

2007-12-02 05:16:23 · 1 answers · asked by Anonymous in Other - Science

How much energy would be require to ionize 5.00mg of Na(g) atoms to Na+(g) ions? THe first ionization energy of Na atoms is 490 kJ/mol.

2007-12-02 05:15:25 · 2 answers · asked by Anonymous in Chemistry

2007-12-02 05:14:59 · 3 answers · asked by lp 1 in Engineering

This solid could be

A. C6,H12,O6

B. Hg

C. KCl

D. CO2

2007-12-02 05:13:27 · 2 answers · asked by Chris M 1 in Chemistry

Add 40 ml of ice cream to 60 ml of milk. assume a final volume of 100 ml. what dilution of ice cream is this?

2007-12-02 05:13:18 · 2 answers · asked by truckee 1 in Biology

2007-12-02 05:12:29 · 3 answers · asked by lp 1 in Engineering

energy level of a hydrogen atom

a) 0.872
b) -1.55
c) 1.55 x 10(-19)
d) 2.42
e) 2.42 x 10(-19)

2007-12-02 05:12:11 · 3 answers · asked by maybe71400 1 in Physics

Angle MOE is bisected by ray OP. Angle MOP =10-3x and Angle POE = X^2-6X. What does angle MOE equal using the qudratic formula or factoring.

I couldn't come up with a reasonable answer using either method to solve it. Can someone help me?

2007-12-02 05:11:50 · 4 answers · asked by Anonymous in Mathematics

i don't get it please explain i appreciate it

thanks!!!!!!!!!

2007-12-02 05:11:42 · 1 answers · asked by Anonymous in Other - Science

Please explain and answer each question given using simple words and not math jargon. I need to understand the FACTS in baby-like terms.

(1) Why does the letter y the same thing as writing f(x). In other words, why does y = f(x) and vice-versa?

(2) What is the basic difference the lines y = x and y = - x?

(3) Why do square root answers have a positive and negative result? Sample: sqrt{4} = +2 and -2. Why TWO answers?

(4) What is the most basic difference between the words DOMAIN and RANGE?

2007-12-02 05:09:57 · 6 answers · asked by journey 1 in Mathematics