Science & Mathematics - 17 November 2007

It has to travel at least 1.5 meters.

2007-11-17 04:14:15 · 3 answers · asked by Jill 2 in Physics

please help me

2007-11-17 04:13:26 · 5 answers · asked by vatey s 1 in Engineering

I cant seem to get the right answer to this:

What is the frequency of a photon with a wavelength of 3.20 10-5 m? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

2007-11-17 04:13:16 · 4 answers · asked by Guy 2 in Chemistry

2007-11-17 04:13:09 · 8 answers · asked by Emma.W 1 in Medicine

Which ones are more effective than allopathic medicine? Which ones are not as effective?
Which ones are not even shown to work at all?
I have read some stuff about people using "energy fields"?? I am embarrassed that this is part of D.O. medicine....

2007-11-17 04:12:26 · 2 answers · asked by Anonymous in Medicine

Explain why, at room temperature, carbon dioxide is a gas but carbon disulfide is a liquid.

2007-11-17 04:09:00 · 3 answers · asked by Anonymous in Chemistry

2007-11-17 04:07:59 · 4 answers · asked by Amanuel C 1 in Engineering

2007-11-17 04:04:19 · 14 answers · asked by lilliam r 1 in Mathematics

Like, I need to know which element they are and which food they are contained in. It's for this project i have to do in Science. We have to create a periodic table of food. Any help will be greatly appreciated!!

2007-11-17 03:58:07 · 4 answers · asked by Just~B~N~Me!! 1 in Chemistry

2007-11-17 03:51:53 · 7 answers · asked by lilliam r 1 in Physics

diploid(DIH ployd),haploid(HAPloyd), heterozygous, sexula reproduction,homologous chro, crossing over,meiosis,zygote,genetic recombination, gametes, dominant, pollination

7.a cell w/ 2 of each kind of chromosome is called___?
8._____are sperm or egg cells.
9. a cell with one of each kind of chromosome is an ___cell.
10.____ chromosomes have genes for the sametraits in the same order on both chromosomes.
11. parent cells make gametes in a process called_____.
12. a(n)_____ is the cell created when a sperm enters an egg.
13._____ _____occurs when male and female gametes join to make a new liveing orgamism.
14. when nonsister chromatids exchange genes, its called _____ ______.
15._____ _____ results in genetic variety.

2007-11-17 03:46:31 · 6 answers · asked by boo 2 in Biology

find a formula for the change in populaetion (P't)
if P(t) is

p(t) = 40(3/2)^t/3

thanx!!!

the answer is:
P'(t) = 40/3 * ln3/2 * (3/2)^t/3

tnanx!!!

2007-11-17 03:44:31 · 4 answers · asked by Anonymous in Mathematics

2007-11-17 03:44:14 · 1 answers · asked by esv_btech 1 in Engineering

I've been struggling with this problem for a while and can't find a solution.

Let M2n be the set {1, 2, 3, ..., 2n}

n+1 integers from the set are chosen.

Show that at least two of the numbers satisfy a|b; meaning a is a divisor of b.

2007-11-17 03:42:16 · 1 answers · asked by tom 5 in Mathematics

Can anybody step-by-step show me how a 4 ton AC unit is designed? including selection of compressors, evap..etc and where I get the tables and stuff I need.

2007-11-17 03:40:42 · 2 answers · asked by Arabi A 1 in Engineering

Had this conversation with hubby not long ago, but we could not come up with an answer. Anyone have any suggestions?

2007-11-17 03:38:46 · 16 answers · asked by Witch 4 in Weather

2007-11-17 03:35:21 · 4 answers · asked by Anonymous in Botany

This one is called the "Traveler's Dilemma"

You and another passenger lose identical souvenirs on an airline. The manager cuts you a deal - you can both write a dollar amount on a piece of paper, between 2 and 100. If you both write the same amount, you both get that amount. However, if one person writes y and the other writes x, and y < x, then the person who wrote y gets y + 2, and the person who wrote x gets y - 2.

What moves will players rationally play?

2007-11-17 03:31:12 · 3 answers · asked by Steve B 1 in Mathematics

I would like to know so that I can take my special someone to see them.

2007-11-17 03:30:32 · 6 answers · asked by Rachel, Mermaid 2 in Astronomy & Space

A pendulum consists of a 1.6 kg stone swinging on a 3.0 m string of negligible mass. The stone has a speed of 8.2 m/s when it passes its lowest point. (a) What is the speed when the string is at 59° to the vertical? (b) What is the greatest angle with the vertical that the string will reach during the stone's motion? (c) If the potential energy of the pendulum-Earth system is taken to be zero at the stone's lowest point, what is the total mechanical energy of the system?

2007-11-17 03:24:23 · 1 answers · asked by shade o 1 in Physics

i have to build an electromagnet for physics and there are some requirements.first of all the larget voltage i am aloud to use is only 1.5 volts. and to get an A(which i desperatly need)i need to beable to pick up at least 200 grams(40 nickles, 200 paperclips etc...)i am wondering what is the best battery to use,ie triple A, double A, C or whatever, what size wire works best, and how many turns i need around my steel/iron bar,and how to strengthen the current. any help is appreciated

2007-11-17 03:20:59 · 7 answers · asked by Anonymous in Engineering

what are the mystery numbers??
we are twin primes.
we are greater than 100 and less than 200.
the product of the sum of the digits of the first number times the sum of the digits of the second number is 80.
NOTE:twin primes are pairs of prime numbers that have a difference of two.
thx for the help....
correct answer gets 10 points!!

2007-11-17 03:20:56 · 3 answers · asked by My name=patience 3 in Mathematics

If someone was born on, 2 / 13 / 1931
and died on 9 / 25 / 2006.
How many years, months, and days were they on earth?
tell me how you came upon yor answer. Thank you

2007-11-17 03:20:15 · 4 answers · asked by benejueves 6 in Mathematics

Will the north star (polaris) always be the north star?

2007-11-17 03:19:44 · 5 answers · asked by Rando B 2 in Astronomy & Space

I have a bunch of questions that our science teacher has asked us to answer by monday. If you know any of these please tell me because I can't find the answers anywhere.

1) Which planet has 16 moons?
2) Where is the largest mountain in the solar system?
3) Which planet has a north pole that receives direct sunlight during its summer season?
4) What is the force of gravity between Jupiter and Earth?
5) What did Galileo name the four moons of Jupiter that he discovered in 1610?

Thanks for the help! :D

2007-11-17 03:16:24 · 7 answers · asked by Anonymous in Astronomy & Space

Graph using x and y intercept 8x-2y=16.

2007-11-17 03:04:22 · 6 answers · asked by Santara 1 in Mathematics

true or false

2007-11-17 03:02:39 · 3 answers · asked by Baby Gurl 1 in Physics

I took magic mushrooms before my math test and I scored 15% higher (from 83% to 98%). Should I continue to do this to get good scores? Thanks.

2007-11-17 02:59:47 · 6 answers · asked by Axis Flip 3 in Mathematics

why it may cause to chaos ? - why does it matter

2007-11-17 02:59:46 · 3 answers · asked by :-) 2 in Astronomy & Space

Polls and surveys whats the weather like where u are

2007-11-17 02:59:05 · 29 answers · asked by Anonymous in Weather