Science & Mathematics - 12 October 2007

this kid in my grade can do something with his tounge in his mouth to convert the oxygen into co2 and whenever he breaths, his breath comes out white. does anyone know how to do thiss, if so please let me know, thanks

2007-10-12 14:03:00 · 5 answers · asked by Anonymous in Other - Science

Bismuth-210 has a half life of 5 days. use the formula m(t) = me^kt
a. a sample originally has a mass of 800mg. Find a formula for the mass remaining after t days
b. find the mass remaining after 30 days
c. when is the mass reduced to 1mg?

2007-10-12 14:00:59 · 4 answers · asked by Anonymous in Mathematics

I looked on www.weather.com yesterday for the 10 day forecast on 10.20.07 (the day ofmy wedding) and it was calling for a 5% chance of showers. I looked today it was caling for a 60% chance. How accurate it the weather, and does it change from day to day? I'm a litle upset because my wedding is outside. Please give me some answers. Thanks

2007-10-12 13:57:27 · 8 answers · asked by jeremiahs gal 1 in Weather

2007-10-12 13:57:10 · 12 answers · asked by Anonymous in Astronomy & Space

A skater moving at 5m/s begins to decelerate at 2m/s each second. How fast will it be moving after 4 seconds.
show me how you did it. tnx

2007-10-12 13:56:02 · 2 answers · asked by Anonymous in Physics

2007-10-12 13:53:57 · 11 answers · asked by Clarity. 3 in Mathematics

I would like to know weather it is inward,outward or not at all

2007-10-12 13:53:32 · 3 answers · asked by jiji v 1 in Physics

Can you die from drinking a half a bottle of cough syrup? I did, being stupid and not thinking.


****, ****, ****.


Or will it just make me sick?

I need answer, guys.

It was..


DiBromm nasal decongestant and antihistamine. >>;

2007-10-12 13:42:50 · 3 answers · asked by Kairi 2 in Medicine

I live in florida and i want to know a feew things,(1)i know what sand fleas can do to fish but do they bite humans(2)whenb is snad flea season and (3) are they good bait

2007-10-12 13:40:54 · 4 answers · asked by Lizzy P 1 in Zoology

I know this may sound kinda weird but for some reason every1 in my school is talking something about the fact that scientists discovered another planet just like earth which has water and the perfect temperature and its 11/2 times the diameter of earth and it rotates around a star called Gliese 581. And its 20 light years away from earth. Is this possible? And if so do u think there is life on it and that humans might land on it someday?

2007-10-12 13:38:55 · 8 answers · asked by ? 3 in Astronomy & Space

the motor is from an old air compressor. i want to modify it to run on 120 volts. I know it can be done. I JUST DON'T KNOW HOW = )

2007-10-12 13:38:00 · 8 answers · asked by manolin923 2 in Engineering

2007-10-12 13:30:18 · 5 answers · asked by Anonymous in Weather

I have a skull-buster of a problem. Running at 57,600 baud the transmitter side works perfectly but the receiver doesn't seem to recognize an incoming character. I know the transmit interrupt is working since the interrupt handler (on a simple 8051 CPU) is capable of driving a string of characters out and they are received OK. But sending a character (or a string of characters) back into the UART fails to produce an interrupt (I've watched the interrupt pin with a logic probe on both transmit and receive). Both of the interrupt enable bits (bits 0 and 1) are set in the UART interrupt enable register, and I'm certain the character coming in is good (a loopback test to the far-end sender works just fine). The baud rate has to be correct (since the same clock drives the receiver as the transmitter), and I'm just kinda stumped. The same code I'm using to initialize it is known to have worked (about 4 years ago) in another application using the same UART.
Any thoughts??
HELP!!!!

2007-10-12 13:26:50 · 2 answers · asked by doug_donaghue 7 in Engineering

2007-10-12 13:26:11 · 2 answers · asked by Anonymous in Medicine

Two cars leave St. Louis from exactly the same spot at exactly the same time, one traveling west at 60 mph and the other traveling east at 40 mph. How long does it take before the cars are 180 miles apart?

2007-10-12 13:15:09 · 12 answers · asked by sarahbeth 4 in Mathematics

2007-10-12 13:13:13 · 10 answers · asked by Anonymous in Astronomy & Space

Let's face it, humans have screwed up the planet good and proper. Surely it's time to call it a day. Should people just stop reproducing, and let the species die out? Leave it to the animals to sort out.

2007-10-12 13:08:45 · 16 answers · asked by Anonymous in Biology

2007-10-12 13:08:16 · 7 answers · asked by Polar Bear 2 in Astronomy & Space

why does it have holes?

2007-10-12 13:08:07 · 4 answers · asked by meteor showers 1 in Astronomy & Space

a. z=26x+20y
b z=32x+16y
c. z=20x+25y
d. z=24x+8y

2007-10-12 13:07:18 · 3 answers · asked by B L 1 in Mathematics

do you know what are All the countries and their capital cities of MIDDLE AMERICA?

2007-10-12 13:04:58 · 3 answers · asked by princess me 1 in Geography

mathematics-in algebra

2007-10-12 13:01:05 · 9 answers · asked by mrs_lildaddy 1 in Mathematics

Which algebraic expression best represents the relationship between the terms in the following sequence and n, their position in the sequence?

1,4,7,10,13........
A.3n+1
B.n+3
C.3n-2
D.n+1

2007-10-12 12:57:45 · 8 answers · asked by miya w 1 in Mathematics

I'm wondering what other birds crow at dawn besides a rosster. Because we are hearing a bird every morning at dawn but it doesn't sound like a rooster. Also to Peacock's crow at dawn?

2007-10-12 12:57:33 · 3 answers · asked by DancerGrl2161 2 in Zoology

My teacher asked a question asking which of the following are always true, and one of the statements was:

A constant force is needed to keep the object moving at a constant velocity.

I know that maybe he said it's false because it should be acceleration instead of velocity, but I think that it may be true; at least up to what we have covered so far.

If something is moving in a circle it takes a constant force towards the center of the object to keep it at a constant velocity, and if something is moving in a straight line it takes a constant force of 0, to keep it's velocity constant.

Did I miss something or am I mistaken?

2007-10-12 12:56:22 · 2 answers · asked by greeneggs4spam 3 in Physics

7 (4 - (23/17)^x ) is greater than or equal to 6

2007-10-12 12:56:01 · 2 answers · asked by jigsawtaz 1 in Mathematics

2007-10-12 12:54:56 · 1 answers · asked by brozippo 2 in Physics

2007-10-12 12:53:39 · 5 answers · asked by Anonymous in Mathematics

A 1.4 kg block is released from rest and allowed to slide down a frictionless surface and into a spring. The far end of the spring is attached to a wall, as shown. The initial height of the block is 0.38 m above the lowest part of the slide and the spring constant is 432 N/m.

(a) What is the block's speed when it is at a height of 0.25 m above the base of the slide?
___m/s
(b) How far is the spring compressed?
___ m
(c) The spring sends the block back to the left. How high does the block rise?
__m

2007-10-12 12:52:48 · 1 answers · asked by Anonymous in Physics

Around a month ago, I had an upper gi series test with the barrium swallow. I also had two abdominal film x-rays and none of them had shields I read on the internet about an abdominal ultrasound and was wondering if it is as thorough as those other tests.

2007-10-12 12:50:47 · 3 answers · asked by Jay 3 in Medicine