Science & Mathematics - 25 October 2007

2007-10-25 11:36:54 · 1 answers · asked by Anonymous in Zoology

1. A rectangular box has a base that has a perimeter of 30cm, a side called A that has a perimeter of 24cm, and a side called B that has a perimeter of 206cm. Find the dimensions of the box.


2.A combination of tiles in the shapes shown will be used for a mosaic. The shapes chose contain a total of 40 tiles, 72 diagonals, and 153 sides. How many triangles, queares, and pentagons will be used?

remember three variable linear equations...

2007-10-25 11:36:13 · 2 answers · asked by Anonymous in Mathematics

can you give me your answer.... plz

1. where did life on Earth originate:
a. the plains of Africa
b. the oceans
c. the glacial valleys of Antarctica
d. Pangaea

2. what causes seasonal change?
a. The tilt of the earth on its axis
b. the rotation of the earth on its axis
c. the changing intensity of the sun's radiation
d. the polar ice caps

3. Which body in our solar system has the greatest mass?
a. Earth
b. Jupiter
c. The sun
d. Venus

2007-10-25 11:32:02 · 4 answers · asked by Anonymous in Earth Sciences & Geology

A flywheel of mass 188 kg has an effective radius of 0.63 m (assume the mass is concentrated along a circumference located at the effective radius of the flywheel).

(a) What torque is required to bring this wheel from rest to a speed of 122 rpm in a time interval of 29.8 s?

(b) How much work is done during the 29.8 s?

2007-10-25 11:31:29 · 1 answers · asked by jordo867 1 in Physics

2007-10-25 11:31:10 · 9 answers · asked by niceymath 1 in Mathematics

2007-10-25 11:30:45 · 0 answers · asked by Anonymous in Chemistry

2007-10-25 11:29:08 · 2 answers · asked by Anonymous in Chemistry

A fire hose held near the ground shoots water at a speed of 13m/s. At what angle(s) should the nozzle point in order that the water land 16 m away? Why are there two different angles?

2007-10-25 11:28:27 · 1 answers · asked by Anonymous in Physics

You have three cookies.

One of them contains and alpha emitter.
One of them contains a beta emitter.
One of them contains a gamma emitter.

You have to sit on one, throw one out the window, and eat the last one.

What would you do and why?

2007-10-25 11:27:46 · 4 answers · asked by Sal 5 in Physics

1). The moving plates of Earth's mantle cause all of the following except :
a. earthquackes
b. volcanoes
c. hurricanes
d. mountains

2. Fossils, layers, and ripple marks are found in which kind of rock?
a. igneous
b. metamorphic
c. sedimentary
d. all of the above

3. Sedimentary rocks can be formed:
a. fragments of other rocks
b. the remains of plants and animals
c. chemicals on the bottom of the lakes and oceans
d. all of the above

2007-10-25 11:26:37 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-25 11:26:25 · 10 answers · asked by Anonymous in Astronomy & Space

(a) If the bob rises to a height of 0.137 m, what was the initial speed of the bullet?


(b) What was the speed of the bullet-bob combination immediately after the collision takes place?

2007-10-25 11:25:55 · 1 answers · asked by pcphil68 2 in Physics

We did NOT even consider the codine in it and now we're worried that he's going to fail the test. It was literally only a half of a pill. Does anyone know anything about common drug screens and how much codine it would take for a positive result?

2007-10-25 11:24:03 · 7 answers · asked by LJ 4 in Medicine

9th grade answer please!

2007-10-25 11:22:11 · 7 answers · asked by james kane 2 in Biology

2007-10-25 11:12:50 · 3 answers · asked by Mike A 2 in Mathematics

2007-10-25 11:11:41 · 3 answers · asked by TANIA P 1 in Geography

2007-10-25 11:10:46 · 3 answers · asked by Alan G 1 in Chemistry

2007-10-25 11:07:52 · 3 answers · asked by Anonymous in Earth Sciences & Geology

~What factors cause leaves to change colors.
Where do these colors come from?
~What are the names of the specific chemical pigments that cause the colors we see (reds, yellows, purples, browns, greens etc.) These are the same pigments (chemical that causes color) that give fruit their different colors.
~What is the process (how it happens) that cause leaves to fall off of the branches. Explain at the cell level. (picture)

Thanks. Please try to awnser.

2007-10-25 11:07:01 · 2 answers · asked by jodles 1 in Botany

How many cells are present in a colony? How are the cells of a colony different and how are they alike?

2007-10-25 11:04:39 · 2 answers · asked by ghostywingz 5 in Biology

2007-10-25 11:00:42 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-25 10:56:53 · 1 answers · asked by Lorri D 1 in Mathematics

Potassium salts are much more expensive than ammonium salts. Ammonium aluminum alum can often be used interchangeably with potassium aluminum alum. What is the maximum weight of ammonium aluminum alum that can be made from 2.20g of aluminum?

2007-10-25 10:56:05 · 2 answers · asked by Anonymous in Chemistry

1. 2-dimethylpentane
2. 1,3-dimethylpropane
3. 3-methylbutane
4. 3,4-dimethylbutane

2007-10-25 10:55:19 · 3 answers · asked by sillyboys_trucksare4girls 2 in Chemistry

2007-10-25 10:54:11 · 1 answers · asked by ahnickzai 1 in Chemistry

Please don't come up with some lame-o answers.. I really need to know.
If *possible* please give me the link to where you got your answer. thanks a lot!

2007-10-25 10:48:13 · 3 answers · asked by Nichole 3 in Chemistry

is the serpinski triangle a fractal?

2007-10-25 10:46:51 · 2 answers · asked by Anonymous in Mathematics

I've worked at a neurohealth school for 20 years and I'd like to research the observations I have collected.

2007-10-25 10:46:31 · 3 answers · asked by Elizabeth S 1 in Biology

Is it primary or secondary active transport? or neither?

2007-10-25 10:43:33 · 2 answers · asked by Anonymous in Biology

2007-10-25 10:42:21 · 3 answers · asked by George 1 in Mathematics