Science & Mathematics - 5 November 2007

Give somtin of ur imagination man
think anything just make it fast
plasma gun , laser guns,etc

2007-11-05 14:38:00 · 2 answers · asked by antigravityashwin 1 in Engineering

This is the question... If a salary of $20,000 is subject to a 20 percent deduction, the net salary is... ? how do i do that, thanks

2007-11-05 14:35:52 · 2 answers · asked by Anonymous in Other - Science

I tried finding solving this matrix but was only able to come up with the zero vector, and I'm pretty sure it does have a non trivial solution

row 1: ( 0 -1 0 ) = 0 row 2: (1 1 1) =0 row 3: ( 1 10 1) =0

the matrix is arranged with the rows on top of eachother

please help

2007-11-05 14:35:09 · 1 answers · asked by phil h 2 in Mathematics

and I know it's a fictional TV show, and I know it's illegal and they would lose their license etc etc... but have you ever heard of someone doing that?

2007-11-05 14:33:04 · 8 answers · asked by Anonymous in Medicine

A vertical spring (ignore its mass), whose spring constant is 930 N/m, is attached to a table and is compressed 0.160 m.
(a) What speed can it give to a 0.500 kg ball when released?
m/s
(b) How high above its original position (spring compressed) will the ball fly?

2007-11-05 14:32:31 · 2 answers · asked by Anonymous in Physics

2007-11-05 14:31:56 · 8 answers · asked by Eugene 6 in Astronomy & Space

How do you factor out the GCF in the following polynomial?

7(x+6)+2a(x+6)

2007-11-05 14:31:42 · 4 answers · asked by SOSme 1 in Mathematics

I know about the magnitudes for measuring light and that my city is about a 4.5 and that irridium flares and shuttle passes can be as bright at -6 or so, but I was wondering about the scale and is there something that is considered a magnitude zero used as a point of scale and if so, what is that object? I have been doing this for several years now and I never thought or been told what a magnitude zero might be. Just wondering.

2007-11-05 14:31:41 · 4 answers · asked by B. 7 in Astronomy & Space

Would a sample of gas in a closed container in space (zero gravity) exert pressure on the sides of the container if the gas was kept at standard temperature and pressure? Explain.

2007-11-05 14:29:50 · 2 answers · asked by Anonymous in Chemistry

A yo-yo has a rotational inertia of 950 g cm^2 and a mass of 120 g. Its axle radius is 3.2 mm, and its string is 120 cm long. The yo-yo rolls from rest down to the end of the sting.

(a) What is the magnitude of its translational acceleration?

(b) How long does it take to reach the end of the string?

As it reaches the end of the string, what are its (c) translational speed, (d) translational kinetic energy, (e) rotational kinetic energy, and (f) rotational speed?

Explain your work. Thanks! :)

2007-11-05 14:28:13 · 1 answers · asked by Anonymous in Physics

how do you determine the mass of a star that IS part of a binary system?

2007-11-05 14:23:37 · 4 answers · asked by Anonymous in Astronomy & Space

only five problem that i cant understand
write each fraction in simplest form dont like thinking too much sorry fractions i hate fractions

1.3 2. 4 3. 10 4. 36
9 18 25 40

word problem :
Mary received $15 for her weekly allowance.She spent $10 at the movie theater with her friends.What fraction of the money, in simplest form, was spent at the theater?
answer:

2007-11-05 14:22:47 · 6 answers · asked by Anonymous in Mathematics

h(x)= 2-x ; 8 is less than or equal to x is less than 0
x squared; 0 is less than or equal to x is less than 8

2007-11-05 14:22:45 · 5 answers · asked by BonneChance 3 in Mathematics

2007-11-05 14:22:43 · 2 answers · asked by aryangurlz87 1 in Astronomy & Space

ok, please follow the link. you'll see an 11" HID spotlight. it runs for 3-4 hours, produces 2900 freakin lumens, and yet still only costs like $120. Most hid lights that are that strong, should cost a lot more, can u see a catch?

2007-11-05 14:20:22 · 2 answers · asked by Anonymous in Engineering

A glass column is filled with mercury and is inverted in a pool of mercury. The mercury column stabilizes at a height of 735 mm above the pool of mercury. What is the pressure of the atmosphere?

-1.03 atm
-0194 atm
-0.967 atm
-0.697 atm
-0.735 atm

2007-11-05 14:19:00 · 1 answers · asked by Anonymous in Chemistry

And I have to include the following words in the diagram:
1.carbon dioxide
2.weathering
3.plant growth
4.abrasion
5.chemical
6.water
7.animal actions
8.freezing & thawing
9.oxygen
10.ice wedging
11.release of pressure
12.mechanical
13.living organisms
14.acid rain

So far, I have weathering to be the largest category,
then under that, chemical and mechanical.

Under chemical, I know acid rain should go somewhere (and Im doubtful about water, carbon dioxide, oxygen, and release of pressure).

Under mechanical, I have plant growth, ice wedging, abrasion, living organisms, and then am doubtful on freezing & thawing and animal actions.

Does anyone know how I could fix this?

2007-11-05 14:16:58 · 2 answers · asked by Michelle 3 in Earth Sciences & Geology

A workers pushes a 1.5 x 10^3 N crate with a horizontal force of 345 N a distance of 24.0 m The coefficient of kinetic force between the crate and the floor is 0.220.

a. How much work is done by the worker on the crate?
b. How much work is done by the floor on the crate?
c. What is the net work done on the crate?

A 0.075 kg ball in a kinetic sculpture is raised 1.32m above the ground by a motorized vertical conveyor belt. A constant frictional force of 0.350 N acts in the direction opposite the conveyor belt's motion. What is the net work done on the ball?

2007-11-05 14:16:26 · 1 answers · asked by redalert 2 in Physics

Problem from the back of my book. I have the answer but not sure how to work it.

A quantity of N2 gas originally held at 4.62 atm pressure in a 1.70-L container at 26°C is transferred to a 13.5-L container at 20.0°C. A quantity of O2 gas originally at 3.34 atm and 26.0°C in a 8.43-L container is transferred to this same container. What is the total pressure in the new container?

2007-11-05 14:15:03 · 1 answers · asked by Reviction 1 in Chemistry

2007-11-05 14:14:18 · 3 answers · asked by Anonymous in Other - Alternative

It is greater than 7 tens and less than 8 tens. The number has 4 ones. Write the number word. please help with answer and how did you work out the problem? please i thank you so very much you are kind to help me.

2007-11-05 14:11:28 · 6 answers · asked by justme 1 in Mathematics

how do you determine the mass of a star that is not part of a binary system?

2007-11-05 14:10:03 · 2 answers · asked by Anonymous in Astronomy & Space

I believe they are basically like little robots just doing what nature programmed them to do.

2007-11-05 14:07:25 · 9 answers · asked by Anonymous in Zoology

A 20.0-L stainless steel container was charged with 2.38 atm of hydrogen gas and 3.00 atm oxygen gas. A spark ignited the mixture, producing water. What is the pressure in the tank at 25 ºC? at 125 ºC

--My teacher said it has something to do with Avogadro's Law, but I have no idea how to even set up the problem since volume is constant??

Hints:
pt 1-- Since V and T are constant, Avogadro’s Law applies. Hydrogen is the limiting reactant.
pt 2--At this temperature the water is also a gas, and its pressure should be added to the pressure of remaining oxygen.

2007-11-05 14:07:23 · 3 answers · asked by nannybugsx83 1 in Chemistry

A spring with k = 10.0 N/m is at the base of a frictionless 30.0° inclined plane. A 0.50 kg object is pressed against the spring, compressing it 0.3 m from its equilibrium position. The object is then released. If the object is not attached to the spring, how far up the incline does it travel before coming to rest and then sliding back down? (See the figure below.)
_________m

Can someone show me how to solve this in steps? I've tried many times and I can't seem to get the right answer. Thanks!

2007-11-05 14:05:39 · 3 answers · asked by Anonymous in Physics

2007-11-05 14:04:54 · 14 answers · asked by lanilaidan 1 in Chemistry

1. Altostratus
2. Cumulus
3. Cirrus

I will post the correct answer with my best choice

2007-11-05 14:03:44 · 7 answers · asked by Anonymous in Weather

Name the coordinates of B' if B(-3,4) is rotated:
90 degrees about (-1,-2)
and 180 degrees about (3,3)
and please can you explain why it is to me?
im not understanding any of this

2007-11-05 14:02:52 · 1 answers · asked by Anonymous in Physics

The genetic code is redundant but not ambiguous. Explain what this statement means.

2007-11-05 14:00:18 · 4 answers · asked by Anonymous in Botany

2007-11-05 13:59:45 · 4 answers · asked by L B 1 in Zoology