Science & Mathematics - 7 February 2007

Easy, but I think it was designed to be a little tricky.
1) How many pairs of chromosomes are in each somatic cell?
2) How many pairs of chromosomes are in egg or sperm?
My answers:
1) 23
2) none
Correct?

2007-02-07 17:11:20 · 3 answers · asked by Anonymous in Biology

how would i solve these problemz :



Suppose the cost of seeing a movie at a theater is $7. Buying a DVD player costs $360, and renting a movie to use on the DVD player is $4. use this info. to solve the problems below...



write an expression to represesnt the cost of seeing Y movies at a theater and renting the same number of movies to use on you DVD player?

2007-02-07 17:07:22 · 5 answers · asked by Anonymous in Mathematics

If it were possible that a woman lived to be 1,000, and she went into puberty at 15 and she never went into menapause, how many children she could she give birth to? Also remember the odds of having twins and triplets. My husband and I have our own answers but they differ. So this is a bet situation. Sure hope you can help.

2007-02-07 17:06:49 · 3 answers · asked by AnnG 1 in Other - Science

"Comp time" is earned within a year, which is divided into 10 time periods; However, if the "comp time" earned within a specific time period is not used within the subsequent 10 time periods from which it was earned, the balance of "comp time" earned 10 time periods ago will be lost or subtracted from the total balance.

E.g. 10 hours is earned on day 1 of the 1st time period. 5 hours is used during time period 5 leaving a balance of 5. Another 10 hours is earned during time period 7 . New balance = 15. At the end of the 10th time period the remaining 5 hours earned on day 1 is lost leaving a balance of 10 hours.

I would like to be able to track hours earned during any time period and know what the balance is at any time and have the program automatically delete unused hours from the balance at the appropriate time.

Any ideas?

2007-02-07 17:04:03 · 3 answers · asked by dlrmjr 1 in Mathematics

I recently saw the NOVA special on string theory. It left me pondering for the better part of the day. The program stated that there is a concentration of effort in using the atom-smashers to produce gravitons, in an attempt to document an "escaping" graviton which would provide proof of the theory. My question is if gravitons are detectable in the first place, wouldn't it be easier to find naturally occurring gravitons passing into or even through our brane, instead of trying to manufacture them? It seems to me that black holes would be better named "graviton stars," since according to what I understand of string theory, a graviton would be the only thing able to "escape" from the singularity. A black hole is, after all, a stellar sized atom smasher, so theoretically wouldn't they be radiating loads of gravitons? Even if all the gravitons are forced to exit our brane, wouldn't there be similar phenomena in parallel universes that would dump gravitons into our brane? Curious.

2007-02-07 17:03:03 · 3 answers · asked by David T 4 in Physics

jacob need to drill a hole that is 0.375".his drill bits are in fractions. what is the answser and how do you do it.

2007-02-07 16:59:50 · 3 answers · asked by maddsk8 2 in Mathematics

Linear inequalities?
3x - y ≤ 6
x ≥ 1
y ≤ 3
--------------------
10x + 2y = 7
y = -5x + 3

this is it
thanks

2007-02-07 16:53:13 · 2 answers · asked by dee free 2 in Mathematics

I use a multitester I have to test AC voltage, DC voltage, ohms, and wondered if I can use it to test the continuous flow of current through a circuit or through the same strand of wire on a power cord, to make sure there is no break in the wire somewhere. Thanks for helping.

2007-02-07 16:53:00 · 3 answers · asked by Zujiya 2 in Engineering

I'm doing my math test tomarrow and i need help with my homework for pratice.Could anyone help me?

im in the 3rd grade btw

2007-02-07 16:52:15 · 11 answers · asked by Mel 2 in Mathematics

how would i solve this but turn it into an equation first?


The sum of four times a number and 17 is equal to the sum of seven times the same number and 2. ??? h.e.l.p. please

2007-02-07 16:51:39 · 7 answers · asked by Anonymous in Mathematics

iwas absent when they did this n we hav test tomoro so i need
to know how to do it

state any restrictions on the variable, then simplify

x^2-x-6
-------------
x^2+3x+2

2007-02-07 16:51:15 · 5 answers · asked by Anonymous in Mathematics

Why are humans unable to acquire metabolic energy from cellulose?

2007-02-07 16:49:13 · 5 answers · asked by Anonymous in Biology

thank you!

2007-02-07 16:45:27 · 2 answers · asked by the guy 2 in Chemistry

2007-02-07 16:45:25 · 2 answers · asked by Me 1 in Mathematics

Can someone tell me why it's possible to use integration when dealing with work?

2007-02-07 16:45:22 · 3 answers · asked by itsSCIENCE 2 in Mathematics

when the earth permanently moves away no tides no seasons or what other things happen.

2007-02-07 16:44:23 · 4 answers · asked by wowww 1 in Astronomy & Space

I started 3 of these and I'm not sure that I'm on the right track.

1. Prove and extend or disprove and salvage:
For every natural number n, 21 + 22 + ... + 2n = 2n+1

2. Prove and extend or disprove and salvage:
For every natural number n > 1, either n is a prime, n is a perfect square, or n | (n−1)!

3. Prove and extend or disprove and salvage:
Let A and B be integers. A + B is even if and only if AB is odd.

2007-02-07 16:42:52 · 2 answers · asked by Chris 1 in Mathematics

2007-02-07 16:41:57 · 1 answers · asked by crombieqtpy15 3 in Mathematics

show work

2007-02-07 16:41:15 · 4 answers · asked by Anonymous in Mathematics

2007-02-07 16:40:46 · 6 answers · asked by ? 1 in Chemistry

2007-02-07 16:37:06 · 3 answers · asked by Anonymous in Chemistry

A) A sentence with an equals sign is called an..................
B)A number that replaces a variable to make an equation true is called the...........................

2007-02-07 16:34:42 · 10 answers · asked by Canucks 1 in Mathematics

F2
Using a Punnett square, show the genotypes and phenotypes of:

1dk 2 dk 3 dk 4 dk 5 dk 6 dk
6 lt 5 lt 4 lt 3 lt 2 lt 1 lt
1/64 6/64 15/64 20/64 15/64 6/64 1/64

dk=dark
lt=light

2007-02-07 16:34:39 · 1 answers · asked by Anonymous in Biology

http://hotmath.com/help/solutions/cpmg02/7/2/Classwork/cpmg02_7_2_Classwork_T-18_264/index.html

Thanks again.

2007-02-07 16:33:53 · 4 answers · asked by Anonymous in Mathematics

I cannot figure this problem out.
You can only make changes to one side.
Prove these 2 are equal:

sin(x) / (1+cos(x)) = (1- cos(x)) / sin(x)

I can't figure this out.

2007-02-07 16:32:05 · 3 answers · asked by Tyler H 3 in Mathematics

2007-02-07 16:32:01 · 2 answers · asked by rockstar 06 1 in Astronomy & Space

answers to any of these would be nice.
1) do you know its natural location? since it's produced by C botulinum im guessing it comes from soil and canned foods that werent properly sealed. and it affects humans if they ingest it. im not sure if i am right or not.
2) what is its function (what metabolic process is it involved in overall, what specific job does it do, what is the mechanism of its function)? i think it has to do with the toxin blocking off the receptors of the nerve to the muscle. but its just my guess im not sure.
3) the proteins structure, including secondary structire and overall 3D shape, the location of ligand binding sites for function and regulation. this i really dont know.

please help me. thanks.

2007-02-07 16:31:33 · 2 answers · asked by what? 7 in Biology

help in physics problems as i have left maths also

2007-02-07 16:28:26 · 6 answers · asked by Anonymous in Mathematics

2007-02-07 16:26:48 · 2 answers · asked by dumbguy94611 1 in Mathematics

a picture of a water pump and its parts,picture of cross section of a water pump & how water pump works

2007-02-07 16:26:27 · 3 answers · asked by nimaljayantha 1 in Engineering