Science & Mathematics - 13 December 2007

2007-12-13 07:26:36 · 11 answers · asked by Dan 2 in Mathematics

Let f:R --> R be a continuous and periodic function such that it's fundamental period p is irrational. Let x_n be an increasing sequence of positive numbers such that x_n --> oo and (x_(n+1) - x_n) --> 0. Show that f(x_n) is dense in f([0, p]) .

2007-12-13 07:26:03 · 2 answers · asked by Steiner 7 in Mathematics

this is a totaly random question...but sharks scare the living hell out of me..and i want to know what kinds of sharks are in key west, FL.

2007-12-13 07:25:37 · 5 answers · asked by got money and you know it 3 in Zoology

2007-12-13 07:25:32 · 2 answers · asked by Anonymous in Mathematics

greenland is totally covered with ice, but we often call it greenland. what is the background behind

2007-12-13 07:21:35 · 9 answers · asked by Anonymous in Geography

2007-12-13 07:17:39 · 5 answers · asked by MeDIGURU 1 in Physics

This may be more of a philosophical question, but I was wondering why the speed of light is what it is. What is it in our universe that makes light travel at this exact speed? Instead of 299,792,458 metres per second, why isn't it 300,000,000 metres per second, or 300,000,001 metres per second?

Is it strange that I find it a bit absurd that there's this mysterious number that defines the maximum speed a massless particle can attain in this universe?

2007-12-13 07:13:56 · 12 answers · asked by Mike 2 in Physics

This is about seismic waves and why they travel at the speeds they do when travelling through different compositions

2007-12-13 07:07:26 · 6 answers · asked by daz171084 1 in Earth Sciences & Geology

question about echinoderms? - from Kate M - 1 answer(s)
Echinoderms: What are they interactions with other organisms, and with humans? - from YOU! - 1 answer(s)
Echinoderms: What are they interactions with other organisms, and with humans? - from YOU! - 1 answer(s)
Are echinoderms endothermic or exothermic? - from erikgh1990 - 1 answer(s)
what are echinoderms? - from jada t - 4 answer(s)
M

2007-12-13 07:07:03 · 1 answers · asked by Anonymous in Chemistry

heres the problem. i have to set this quadratic inequality to zero...here it is: x*squared* -5x-4<-9....which simplifies to x*squared* -5x +5x< 0. then i need to find the binomial that makes x*squared* -5x +5x. HELP!!!! so far people at my school have told me that its impossible...sos.

2007-12-13 07:04:37 · 4 answers · asked by audi 3 in Mathematics

Thanks.

2007-12-13 07:04:01 · 2 answers · asked by chemquestions1 1 in Chemistry

These are the definitions to questions 1-16.
Choices:
a. larva stage of fly
b. shedding of exoskeleton
c. pupa stage of moth
d. ants, bees and termites
e. hard, outer skeleton
f. "feelers" on insects
g. without a backbone
h. having jointed legs
i. change in body form during development
j. larva stage of butterfly
k. spins spider web thread.
l. branched breathing tubes in insects
m. the study of insects
n. breathing openings in abdomen of insects
o. color pattern to blend with habitat
p. colonies of bees and wasps.

In the questions 1-16 are the words to the definitions above. You match them up.

Question 1:
arthropod

Question 2:
invertebrate

Question 3:
exoskeleton

Question 4:
protective coloration

Question 5:
molting

Question 6:
spinneret

Question 7:
spiracle

Question 8:
metamorphosis

Question 9:
maggot

Question 10:
antennae

Question 11:
cocoon

Question 12:
trachea

Question 13:
caterpillar

Question 14:
hive

Question 15:
entomology

Question 16:
social insects

thank you!

2007-12-13 07:03:43 · 3 answers · asked by baby girl 2 in Zoology

https://ecot.iqity.net/clsresshr/class.com/ewew_content/geom1b/exammedia/geo2u4e10p10g56.gif
how could i find it

the selecitons are
1782 594 1188 891
:D thanks

2007-12-13 07:01:21 · 6 answers · asked by ehh 2 in Mathematics

2007-12-13 07:00:47 · 1 answers · asked by Anonymous in Biology

2007-12-13 06:59:57 · 6 answers · asked by Kinloch K 1 in Physics

how can i calculate the effects of newton's cradle using a mathematical formula, showing the balance of momentum and energy conservation on both sides of the equation???

2007-12-13 06:56:38 · 1 answers · asked by Marcus 1 in Physics

Or is the size irrelevant, and the amount of gas produced is a direct result of the amount of energy used...

2007-12-13 06:55:23 · 3 answers · asked by Anonymous in Chemistry

I want to learn because I cannot pass through a wall.
Θέλω να μάθω γιατί δεν μπορώ να περάσω μέσα από έναν τοίχο.

2007-12-13 06:55:18 · 4 answers · asked by bmplefour135 2 in Physics

1: A bolt on a car engine is to be tightened with a torque of 35 Newton meters. If you have a 25 cm long wrench, what force should you exert?
1.4 N
1.4 x 102 N
8.8 N
8.8 x 10-1 N


2: Two disks have the same mass, but one (designated as D) has twice the diameter of the other (designated as d). Which would be harder to start rotating?
D
d
They are equally hard to rotate
Not enough information given


3: Angular acceleration is the rate of change of:
Linear displacement
Angular displacement
Linear velocity
Angular velocity


4: What is the angular velocity in rad/sec of the tip of a second hand of a watch?
1 rad/sec
6 rad/s
0.60 rad/sec
0.10 rad/sec


5: The direction of the rotation of a spinning object can be changed only by applying a(n) ______.
Force
Torque
Velocity
None of the Above


6: To relate the Angular momentum of a particle with its linear momentum, you need the particle’s:
Displacement from the origin
Distance from the origin
Velocity vector
Torque


7: Mass is an analogous linear quantity to the angular form of:
Weight
Torque
Inertia
Acceleration


8: As a gyroscope slows down due to friction, the rate of precession increases due to:
The direct relationship between angular momentum and precession
The inverse relationship between inertia and angular acceleration
The direct relationship between torque and angular acceleration
The inverse relationship between angular momentum and precession


9: The heavy rim around a Frisbee is useful because it gives it:
A large moment of inertia
A small moment of inertia
A decrease in the gyroscopic effect
An increase in it’s precession


10: An object moving in a circle at constant speed has:
No acceleration
Acceleration tangent to the circle
Acceleration towards the center of the circle
Acceleration away from the center of the circle

2007-12-13 06:50:35 · 2 answers · asked by Anonymous in Physics

So Exams 1 and 2 are worth 30% of grade each (60% total) and final worth 40%. So far I've gotten 87.5% and 79.3%. Is it possible to get an A- (90%) in the class if I get an A on the final?

2007-12-13 06:45:18 · 17 answers · asked by mmd443 2 in Mathematics

Seriously, why do us men have nipples? We don't use them, they are just there? Biologically why do we have them? What is the point of a man having nipples? Most other male animal creatures have no nipples, why do we have them?

2007-12-13 06:42:02 · 9 answers · asked by Anonymous in Biology

HI I believe have a simple solution for solving the gas emission problem using simple scientifc principles. Do you have any helpful contacts and resources that you can send me to get started.

2007-12-13 06:36:37 · 8 answers · asked by doll 3 in Earth Sciences & Geology

You know, when it's the winter, you're outside, it's cold, and you decide you want to plant one on the flag pole in the front yard (when no ones looking, of course)?

2007-12-13 06:36:04 · 5 answers · asked by Anonymous in Physics

2007-12-13 06:34:40 · 3 answers · asked by Gater 1 1 in Astronomy & Space

How many excess electrons does this person get?
By how much does her mass increase?

2007-12-13 06:31:30 · 1 answers · asked by Dan 1 in Physics

if i have a 84.6 in a class and want at least a 79.5 to keep my B what do i need to get on the exam if the exam counts for 20% just give me the formula if you could thank you

2007-12-13 06:31:26 · 12 answers · asked by Anonymous in Mathematics

2007-12-13 06:31:05 · 3 answers · asked by Anonymous in Medicine

does iron have smaller grains? and does this make it weaker. or is it the other way around. physics coursework for tomorrow, and I've found two bits of information saying different things. thanks

2007-12-13 06:29:13 · 3 answers · asked by Joe B 1 in Engineering

please anwer this question

2007-12-13 06:27:40 · 5 answers · asked by heni1000 1 in Engineering

A friend gave me this rule for my maths homework because I couldn't work it out (I wont bore you with everything else.)
The rule is n^3-m^3=(n-m)(n^2+m^2+nm) . The main problem I have is I don't know what to do here: m)(n and nm (is it added together or times or???)Can someone please give an example or an explanation of how to use it.

2007-12-13 06:26:40 · 5 answers · asked by iisjman07 4 in Mathematics