Science & Mathematics - 3 December 2007

SCIENCE!!!!!!!!!!!

2007-12-03 10:04:15 · 1 answers · asked by MR. AWESOME 2 in Weather

1. whats an example of Newtons Third law of science?
2. Name a unit for measuring:
force, mass, and weight
3. Give some examples of forces.

2007-12-03 10:03:41 · 1 answers · asked by charday_bonner 3 in Chemistry

On a small scale, calcium can be isolated through the retion of calcium chloride with sodium metal
CaCl2 + 2Na --> Ca + 2NaCl
Question:
how many moles of NaClare produced by the reaction of 14.0 mol Na?

2007-12-03 10:02:45 · 1 answers · asked by Anonymous in Chemistry

2007-12-03 10:01:53 · 10 answers · asked by amanda r 2 in Paranormal Phenomena

The fossilized duckbilled hadrosaur is so well preserved that scientists have been able to calculate its muscle mass and learn that it was more muscular than thought, probably giving it the ability to outrun predators such as T. rex.

This is pure conjecture and it is being presented as fact. I dont believe anything they say. Why should I?

2007-12-03 10:01:48 · 3 answers · asked by Anonymous in Biology

An 85 kg fisherman jumps from a dock into a 135 kg rowboat at rest on the west side of the dock. If the velocity of the fisherman is 4.3 m/s to the west as he leaves the dock, what is the final velocity of the fisherman and the boat.

A dry cleaner throws a 22 kg bag of laundry onto a stationary 9 kg cart. The cart and laundry bag begin moving at 3 m/s to the right. Find the velocity of the laundry bag before the collision.

2007-12-03 10:01:33 · 2 answers · asked by Doc. Ock 3 in Physics

1. A monatomic ideal gas ( = 1.67) is contained within a box whose volume is 5.0 m3. The pressure of the gas is 7.00 105 Pa. The total mass of the gas is 2.5 kg. What is the speed of sound in the gas?

2. Suppose that sound is emitted uniformly in all directions by a public address system. The intensity at a location 26 m away from the sound source is 3.50 10-4 W/m2. What is the intensity at a spot that is 76 m away?

3.You are riding your bicycle directly away from a stationary source of sound and hear a frequency that is 2.5% lower than the emitted frequency. The speed of sound at the temperature that day is 350 m/s. What is your speed?

4.A 3.49 rad/s (33 1/3 rpm) record has a 3.00 kHz tone cut in the groove. If the groove is located 0.090 m from the center of the record (see drawing), what is the "wavelength" in the groove?

2007-12-03 10:00:23 · 1 answers · asked by Anonymous in Physics

i want to see live views of the earth from space.

2007-12-03 09:58:21 · 6 answers · asked by Anonymous in Astronomy & Space

i want to see live satelite pictures of the united states.

2007-12-03 09:55:23 · 6 answers · asked by Anonymous in Astronomy & Space

2007-12-03 09:54:41 · 3 answers · asked by cheezzznitz 5 in Botany

Our ghosts like chocolate? Is paranormal activity okay in the digestive system?

2007-12-03 09:53:41 · 12 answers · asked by CandyxAcid 3 in Paranormal Phenomena

2007-12-03 09:52:30 · 4 answers · asked by Pooter 1 in Physics

a person who is 56 years old and is suffering from hypertension for the last 3 years and was admitted to the ER with blood pressure at 190/125 and had previously eaten 2 big bags of chips and two bottles of diet coke. do the chips and drinks have anything to do with his hypertension? what mechanisms of cardiovascular physiology explain the increase in blood pressure?

2007-12-03 09:52:28 · 7 answers · asked by Manuel Del T 1 in Medicine

2007-12-03 09:50:36 · 5 answers · asked by Anonymous in Physics

i need to know exact details and i cant find anything!
help anyone?

2007-12-03 09:50:28 · 7 answers · asked by Anonymous in Earth Sciences & Geology

the subject is td technical drawing

2007-12-03 09:50:17 · 1 answers · asked by channy not fanny 1 in Mathematics

How much energy is required to change a 20 g ice cube from ice at -40°C to steam at 100°C?

2007-12-03 09:47:55 · 2 answers · asked by Anonymous in Physics

A solution is prepared by dissolving 21.0 grams of K2CO3 in 96.0 grams of water. The solution has a density of 1.17 g/ml. calculate the molarity of the solution. the first thing i did was to add 96 and 21 grams to get 117 grams as the weight of the solution...and from there i was stuck. would i divide 117 by 1.17 to get a 100 ml solution? then ...

thanks in advance!

2007-12-03 09:46:17 · 2 answers · asked by chrissymoo7 3 in Chemistry

My dad said that when things spin they pull objects towards it and the bigger the object, the faster it spins, and the more gravity it has. He said if something really small was spinning a lot faster than something really big than it would have more gravity. I'm learning about this in school and I haven't heard anything of the sort, so I'm seriously doubting my dad's theory...


Could someone give me an accurate explanation of what's actually correct?

2007-12-03 09:46:17 · 4 answers · asked by Anonymous in Physics

1) y^3 - 64

2) y^3 - 64

3) b^3 + 8

4) 81y^2 - 121

2007-12-03 09:43:44 · 2 answers · asked by Rachel 2 in Mathematics

It should involve a switch to press

2007-12-03 09:43:11 · 1 answers · asked by Anonymous in Engineering

2007-12-03 09:43:11 · 3 answers · asked by Anonymous in Mathematics

the pipes leading to the showers in your locker room are old and inadequate. while the city water pressure is 700,000 Pa, the pressure in the locker room when one shower is on is 600,000 Pa. Use poiseuille's equation to calculate the approximate pressure if three shower are on.

P.S. is it trick question. the anser is 400,000 Pa . Please help me out

2007-12-03 09:42:27 · 1 answers · asked by goofy 2 in Physics

?????????????????????

2007-12-03 09:42:11 · 6 answers · asked by ghjgghjhk 3 in Weather

how do you answer this? please explain it, thanks.

2007-12-03 09:42:09 · 1 answers · asked by Anonymous 1 in Chemistry

It says I have to write a statement of the trigonometric ratio being described. I don't really understand it. So could someone please help me? It's REALLY appreciated. :)

2007-12-03 09:40:31 · 2 answers · asked by Shippo V 1 in Mathematics

Using exponents write the prime factorization of :

42 , 120, 48, and 63


answers ONLY easier for you!!
help fast pleaseeeeeeeeeeeeeeee!!!!!!! Thanksss Ill give the correct answer great feedback!!! help :-)

2007-12-03 09:40:11 · 6 answers · asked by Anonymous in Mathematics

I cant remember the equation to find distance speed and time. What is it?

2007-12-03 09:39:55 · 7 answers · asked by Anonymous in Mathematics

explain this please

2007-12-03 09:37:55 · 12 answers · asked by DeeDee 1 in Chemistry

1.One 2.5 kg paint bucket is hanging by a massless cord from another 2.5 kg paint bucket, also hanging by a massless cord,


(a) If the buckets are at rest, what is the tension in each cord?
N (lower bucket)
N (upper bucket)
(b) If the two buckets are pulled upward with an acceleration of 1.50 m/s2 by the upper cord, calculate the tension in each cord.
N (lower bucket)
N (upper bucket)

2. A flower pot with a mass of 9.3kg is hanging by two wires that make an angle of 78° from the horizontal.
What is the tension on each wire? Newtons

What angle would the wires have to be at for the tension on each wire to be 93Newtons? wrong check markdegrees

After watering the plant, the angle of the wires changes to 79° and the tension was 47.5N. How much water was added to the plant? kg.

A third rope is added to the flower pot

If the angle that each rope makes with the horizontal remains 78° and the mass is still 9.3kg, what is the tension on each wire? Newtons

2007-12-03 09:36:39 · 1 answers · asked by Shawn Carter 1 in Physics