Science & Mathematics - 11 September 2007

2007-09-11 10:31:40 · 2 answers · asked by Jennifer V 1 in Chemistry

i need a real experts answer.

2007-09-11 10:28:53 · 3 answers · asked by sweetiepie 1 in Weather

The diameter of a certain atomic nucleus is 2.60 x 10-3 pm and its mass is 3.40 x 10-23 g. What is the density of the nucleus in grams per centimeter cubed? Assume the nucleus is a sphere with a volume equal to 4/3 π r3

To enter a number in exponential notation use an e for the exponent, e.g., 2.34 x 106 enter as 2.34e6 2.34 x 10-16 enter as 2.34e-16

2007-09-11 10:28:09 · 4 answers · asked by Anonymous in Chemistry

2007-09-11 10:27:09 · 4 answers · asked by Zazzare 2 in Mathematics

the whole question : Chlorine-35 is one isotope of chlorine. (35 is the mass number) chlorine-37 is another isotope of chlorine. How many protons and neutrons are in each isotope of chlorine?

i have it answered but idk if its right

2007-09-11 10:26:44 · 1 answers · asked by nothinbutnet2009 4 in Chemistry

Calculate the volume occupied by 54.1 grams of a substance with a density of 3.26 grams/mL.

2007-09-11 10:22:40 · 4 answers · asked by Steven V 2 in Chemistry

What is the name of a reddish orange snake that is venomous that lives in New York?

2007-09-11 10:20:26 · 5 answers · asked by gracie 1 in Zoology

I had this dream last night where I jumped from a high diving board into a pool and I could not rise back up again

In the dream I noticed the pool ventilation was switched off which I thought was the reason in the dream but I know that is not the answer.

I was at the bottom and I had to get over to the steps to drag myself up to the surface

Could this ever happen?

Can it happen at a particular depth or with a certain kind of water?

2007-09-11 10:20:05 · 10 answers · asked by Northern Spriggan 6 in Physics

How mush distance now remains to the wall?
It says assume the speed of sound is 340 m/s.

2007-09-11 10:17:35 · 1 answers · asked by Alexander 6 in Physics

2007-09-11 10:15:44 · 22 answers · asked by Urrka N Da CLuB 1 in Astronomy & Space

2007-09-11 10:14:29 · 4 answers · asked by david l 1 in Chemistry

2007-09-11 10:06:10 · 9 answers · asked by Anonymous in Geography

tetanus makes u contract to death(blocks the relaxation pathway of muscles). and bottulism flaccid to death(stop production of acetylcoline which montracts muscles).

2007-09-11 10:04:33 · 3 answers · asked by tebuny 3 in Medicine

2007-09-11 10:02:43 · 5 answers · asked by cindy61892 2 in Zoology

2007-09-11 10:02:36 · 3 answers · asked by Why? 1 in Mathematics

kvar of capacitors are needed badly!

2007-09-11 10:01:12 · 1 answers · asked by ghasemee 1 in Engineering

what does Christianity have to say about natural selection

2007-09-11 09:59:01 · 5 answers · asked by life_rules 1 in Zoology

At the local candy store, three delicious candies are on sale.
A Sweetie, a Yummie and a Tastie together cost $.40.
A Tastie is over three times the price of a Sweetie.
Six Sweeties are worth more than a Yummie.
A Tastie, plus two Sweeties costs less than a Yummie.
Can you determine the price of each type of candy?

Tell how you got your answer.

2007-09-11 09:56:58 · 2 answers · asked by Anonymous in Mathematics

k, now i've been reading these astrology magazines and i just hit the topic of black holes. I'm sure everyone knows how black holes have such a great gravitational pull that they pulll everything into them including light. which is said to mean that they're pulling things in at a speed greater than 186,000 ft/s... soo my question is, how can you see a black hole at all if the said is true. Dont you need to have light to see? If all the light needed to see the black hole is being sucked in, destroyed, or w/e it is a black hole does shouldnt it be sort've invisible?
Theres probabaly a simple answer to this but i just cant think of it.

2007-09-11 09:56:50 · 11 answers · asked by Anonymous in Astronomy & Space

hurry up on it

2007-09-11 09:56:27 · 2 answers · asked by melliniaconnor 1 in Earth Sciences & Geology

Thank You need work

2007-09-11 09:49:32 · 4 answers · asked by Shepard S 1 in Mathematics

What is a counterexample in general.. and could you help me on a few of my questions of math... my teacher gives us our homework and does not explain it until tomorrow.. i know it is gay but i have to live with it...

write a counterexample if the statement is false
1. if an angle measures 94 degrees then it is obtuse
2. if terry lives in Tampa, then she lives in florida

Thanks for any answers and please dont answer this if you dont know the answer

2007-09-11 09:48:55 · 4 answers · asked by Cat Lover 4 in Mathematics

i know some sciencist believe that major existions have happened because of the poles switching. and i know we are do for a switching. i also heard that the north magnetic pole is on the move right now it is in canada and soon will be in russia. do you think it is really moving or do you think it has to do with the poles switching?

2007-09-11 09:47:35 · 5 answers · asked by dmc 2 in Earth Sciences & Geology

integral (sqrt(7-2x^2)) / x^2

Using the tables I found that a=sqrt 7 , u=x (sqrt2). But when I plug it into the required integral its not the right answer. WHY?

2007-09-11 09:47:20 · 3 answers · asked by Anonymous in Mathematics

An object is released from rest on a planet that has no atmosphere. The object falls freely for 2.77 m in the first second.

What is the magnitude of the acceleration due to gravity on the planet?
Answer in units of m/s/s.

2007-09-11 09:46:42 · 2 answers · asked by josh j 1 in Physics

thank you

2007-09-11 09:46:25 · 5 answers · asked by Magnun S 3 in Mathematics

A projectile of mass 0.552 kg is shot from a
cannon, at height 7 m,
with an initial velocity vi having a horizontal
component of 5 ms.
The projectile rises to a maximum height of
Y above the end of the cannon's barrel and
strikes the ground a horizontal distance X
past the end of the cannon's barrel.
The acceleration of gravity is 9.8 ms^2 :

Determine the vertical component of the
initial velocity at the end of the cannon's bar-
rel, where the projectile begins its trajectory.
Answer in units of ms.

Determine the maximum height Y the pro-
jectile achieves after leaving the end of the
cannon's barrel. Answer in units of m.

Find the magnitude of the velocity vector
when the projectile hits the ground. Answer
in units of ms.

Find the magnitude of the angle (with repect
to horizontal) the projectile makes when im-
pacting the ground. Answer in units of degree.

Find the range"x" of the projectile. Answer
in units of m.

2007-09-11 09:45:10 · 1 answers · asked by shan h 1 in Physics

A car traveling with a velocity of 22 m/s is accelerated uniformly at 1.4 m/s/s for 6.4 s.

What is its final velocity?
Answer in units of m/s.

2007-09-11 09:44:49 · 1 answers · asked by josh j 1 in Physics

im talking FUR people!not feathers,not scales,FUR!ty!☺

2007-09-11 09:42:59 · 5 answers · asked by Swirlz 2 in Zoology

what is w to the 2nd power subtract 1??? please factor. and explain step by step.

2007-09-11 09:42:00 · 2 answers · asked by Anonymous in Mathematics