Science & Mathematics - 7 January 2007

to demostrate it, we have been shown a round bottomed flask with several holes(4) and vertical tubes coming out of them in which intial water seeks its level....then there is a piston on the cork,which when we press,jets of water come out from the nozzels of the tubes ...the jets of water reache the same height...

i wanted to know....it is written in the book that 'jets of water will reach the same height'....HOW?....the pressure applied by the piston here has travelled throughout....but the mass in the lowest column(highest column) is much more ...than the mass in the other columns....so as f=ma...force = mass*acc;

thus,....the acceleration in the lower one shud be least and the acc in the highest (lowest heighted column) shud be most coz of mass.....so how can they reach the same height in the same time?

plz explain

2007-01-07 06:43:03 · 4 answers · asked by catty 4 in Physics

2007-01-07 06:42:47 · 5 answers · asked by Anonymous in Mathematics

2007-01-07 06:40:52 · 4 answers · asked by bozomo99 1 in Astronomy & Space

i have this easy math problem, but the question is tricky for me. i always get this kind of question in my physics class too.

Hershey's car gets 24 miles per gallon of gasoline and Wynmark's truck gets 18 miles per gallon. When travelling from berlington to white river they both use a whole number of gallons of gasoline. What is the shortest distance possible between burlington and white river?

hope u cud help me with this. thanks!! =) hahahaha by the way.. this is my brother's problem, not mine. and i feel so ashamed. hahaha =)

2007-01-07 06:39:04 · 7 answers · asked by shiela___9 1 in Mathematics

Would you ever go in one if they did? If so, where would you go?

2007-01-07 06:38:51 · 16 answers · asked by Michelle 6 in Astronomy & Space

2007-01-07 06:38:13 · 4 answers · asked by a1888y 1 in Engineering

I heard many years ago, that with technology available, science could help people live to be 200 years or so, although the quality of life wouldn't be the greatest. Would you want to live that long if you were able to? Would you ever voluntarily help science by freezing your body for 100 years?

2007-01-07 06:37:55 · 11 answers · asked by Michelle 6 in Biology

I have to graph an ellipse and find its foci
how do i do this
ex: 5x*squared* + y*squared* = 25

2007-01-07 06:36:39 · 2 answers · asked by Anonymous in Mathematics

2007-01-07 06:36:36 · 4 answers · asked by anya7626 1 in Engineering

I have to leave my answers with positive exponents only.

(a^-4b^7)^-5

-1/p^-6

2007-01-07 06:35:47 · 5 answers · asked by margarita_9902@sbcglobal.net 2 in Mathematics

brain,liver,blood....wich a most dangerous?what to do better to fight with them?

2007-01-07 06:34:58 · 3 answers · asked by Felix Noel 2 in Biology

What is the number of valence electrons in Group 17 elements in the Periodic Table?
a.) 7
b.) 8
c.) 17
d.) equal to the period number

2007-01-07 06:34:30 · 2 answers · asked by killsyche 3 in Physics

2007-01-07 06:33:56 · 1 answers · asked by abc 1 in Mathematics

this is for a biology term paper.

2007-01-07 06:31:35 · 1 answers · asked by brolle09 2 in Biology

As our front teeth are designed to scrape meat from bone and such,is it in our nature to eat meat from another animal at least once a week,or so,to insure certain protiens is ingested???...Thanks for your answer...Sincereley,Tom Science 4

2007-01-07 06:30:38 · 9 answers · asked by Anonymous in Biology

There is a man, looking for his brother's children. (brother is deceased) Can DNA prove, relationship? He has found two women who might be his nieces and they are all eager to know. Do they need DNA of actual father?

2007-01-07 06:29:45 · 2 answers · asked by Emma J 3 in Biology

Antiboitic A effectively cures the infection 60% of the time & costs 50$.
Antibiotic B effectively cures the infection 90% of the time & costs 80$.
Plan 1: Treat with antibiotic A first and if it isnt effective then treat with antiobiotic B
Plan 2: Treat with antibiotic B first and if it isnt effective then treat with antibiotic A
Both antibiotics work independently of eachother

2007-01-07 06:29:42 · 3 answers · asked by Anonymous in Mathematics

2007-01-07 06:29:38 · 10 answers · asked by tiffany_willis 2 in Zoology

Suppose that a person inherited the ability to roll their tongue from one parent and the non rolling trait from the other parent. Would he or she be able to roll their tongue? If you can explain it to me.

2007-01-07 06:28:54 · 4 answers · asked by Sunshine 4 in Biology

2007-01-07 06:28:38 · 2 answers · asked by spenceboy23 1 in Earth Sciences & Geology

i live in nyc, and its not snowing yet. and i wanna know when it's going to snow

2007-01-07 06:28:07 · 10 answers · asked by dudee 2 in Weather

-25000 x^2 + 10,000 x + 15,000

Is this a parabola?

2007-01-07 06:24:54 · 6 answers · asked by Anonymous in Mathematics

As we are here in Ohio? I would love to have some snow.

2007-01-07 06:23:11 · 4 answers · asked by Moose 6 in Weather

2007-01-07 06:22:31 · 6 answers · asked by Anonymous in Astronomy & Space

1)A weight suspended from a spring is seen to bob up and down over a distance of 45 centimeters 6 times each second. What is its frequency in Hz? And whats the period in s? And whats the amplitude in cm?
2)Radio waves travel at the speed of light--300000 km/s. What is the wavelength of radio waves received at 700 MHz on your radio dial in m?
3)A mosquito flaps its wings 610 vibrations per second, which produces the annoying 610 Hz buzz. The speed of sound is 340 m/s. How far does the sound travel between wing beats? In other words, find the wavelength of the mosquito's sound in meters.
4)On a keyboard, you strike a note, which has a frequency of 260 Hz.
(a) What is the period of one vibration of this tone?
s
(b) As the sound leaves the instrument at a speed of 340 m/s, what is its wavelength in air?
m

2007-01-07 06:19:45 · 1 answers · asked by Anonymous in Physics

plzz

2007-01-07 06:18:53 · 8 answers · asked by Anonymous in Mathematics

2007-01-07 06:18:14 · 3 answers · asked by Anonymous in Astronomy & Space

I am doing a map of Ancient Greece, can't seem to find these anywhere.....

2007-01-07 06:17:15 · 6 answers · asked by Anonymous in Geography

An how long does it for a bone to 'become' a fossil?

2007-01-07 06:17:06 · 7 answers · asked by Part Time Cynic 7 in Earth Sciences & Geology

3-3n/n2+2n-3 divided by (2n-2)

2007-01-07 06:17:04 · 1 answers · asked by alyssa p 1 in Mathematics