Science & Mathematics - 1 October 2007

Just wondering if magnets can attract a 1 schilling coin.

2007-10-01 05:05:30 · 4 answers · asked by Chill Town 1 in Earth Sciences & Geology

why do mass appear to gain weight when being accelerated upward.... is there an equation to explain it, if so which one is it...

2007-10-01 05:05:25 · 6 answers · asked by Dan 2 in Physics

This is a muti choice question
(a) accidents
(b)density
(c) gravity
(d) transit

2007-10-01 05:04:49 · 4 answers · asked by Anonymous in Physics

2007-10-01 05:00:06 · 9 answers · asked by Mercury 2010 7 in Engineering

2007-10-01 04:57:19 · 1 answers · asked by prateek 1 in Physics

Matrix A =
3 2
-1 -1

Using this relation, A^2+2A+3I = 0 , find 1/A(inverse of A).

2007-10-01 04:56:03 · 3 answers · asked by aMused 2 in Mathematics

Calculate the centripetal acceleration and the centripetal force acting on a wooden block. Recall that the block's mass is 0.21 kg, with radius 0.70 m, and the block makes 15 rotations in 18.4 s.

2007-10-01 04:46:51 · 2 answers · asked by Anonymous in Physics

2007-10-01 04:39:19 · 10 answers · asked by Sandra G 1 in Mathematics

The Old Testament account of Noah (Gen. 6:9 - 9:19) states that the LORD instructed Noah to build a large arc (boat) in order to preserve different animal species from the great flood that was to come. The dimensions of the arc are described in Gen. 6:15:

This is how you are to make it: the length of the ark three hundred cubits,
its breadth fifty cubits, and its height thirty cubits.

a. Assuming that the arc was essentially in the shape of a rectangular prism (box), and that all the space was usable, what would have been the volume of the arc in cubic feet (note: one cubit is about 1.5 ft in length).

b. A Toyota Camry is about 12 ft long by 6 1/2 ft wide by 5 1/2 ft. high. Assuming that

2007-10-01 04:37:37 · 2 answers · asked by Anonymous in Mathematics

A silo, used to store grain and corn, is in the shape of a cylinder with a hemisphere on top. Height of silo is 100ft.
a. What is the volume (capacity) of a silo that is 20 feet in diameter?
b. What is the surface area of the silo?

2007-10-01 04:36:52 · 2 answers · asked by Anonymous in Mathematics

2007-10-01 04:29:07 · 9 answers · asked by Kaylin 4 in Weather

Does the International space station have an optical telescope onboard

2007-10-01 04:18:25 · 7 answers · asked by Anonymous in Astronomy & Space

Which orbital has the following quantum numbers?

n = 3 minimum value of ml = -1

2007-10-01 04:14:16 · 3 answers · asked by Anonymous in Chemistry

I'm an art teacher assigned to a special school science project based on Legos. Lego sponsers a sci project for elem kids where they have to build a lego replica of their research. The topic this year is "where energy comes from." Our project is to research anything, and find out where the energy comes from (ex: a clock runs on batteries, batteries work because of acid, this acid comes from. . . )

My fourth graders are dead-set on researching this info for toilets. I understand that toilets work using a siphon (what type of energy if any is that?), do all toilets use pumps? If so, where does that energy come from?

I know where our water supply comes from (a river) and where it goes after we flush (a waste treatment plant).

If you have any guidance as to where all of the energy comes from I would really appreciate it. We are SERIOUSLY in over our heads.

2007-10-01 04:12:45 · 2 answers · asked by ? 2 in Other - Science

2007-10-01 04:01:51 · 2 answers · asked by GC 1 in Engineering

Telling me what a space alien 5000 years ago knew is futile. You do not know what they may or may not have known. A baby whale swims the day he is born. A space alien may travel space the day he was born but may not know exactly how to build a pyramid marker the first time. It makes a better arguement conversation by sticking to what you know.
We know the pyramids are there. We know, we do not know exactly why. Go from there and use your mind instead of googling. If google knew the answers they would not be wasting their time guessing. Is it possible that some time in the past Earth had visitors from some other existance? Where thay as advanced as you "imagine"?

2007-10-01 04:00:24 · 4 answers · asked by Anonymous in Astronomy & Space

you'll know what it is if you joined, I'm Ichigo900!
(btw, Jerry isn't my name)

2007-10-01 03:51:55 · 5 answers · asked by TimmiT 5 in Other - Alternative

I keep hearing that the colon stores 'plaque' and old fecal matter, toxins etc. on the intestinal walls that can stay there for years. Is it true? Is it a good idea to do a colon cleanse, water or juice fast or enema to clean it out? Please be descriptive and don't just say yes or no. Thanks for your help!

2007-10-01 03:50:45 · 7 answers · asked by Kristy K 4 in Medicine

Please answer from your own opinion: What is more important nature or nuture? And why?

2007-10-01 03:49:09 · 8 answers · asked by ? 1 in Earth Sciences & Geology

is there more evidence for evolution or creationism?
(btw, I'm for the first one)

2007-10-01 03:48:30 · 18 answers · asked by TimmiT 5 in Biology

I want to help a group of boy scouts build a trebuchet suitable for launching a tennis ball. I would prefer to use PVC due to weight and because it is an easy material to work with. However, I am also willing to consider good old pine 2x4s.

the unit must break down so that it is easy to transport and it must assemble fairly quickly and eaisly on sight. And, since we are dealing with spastic 10 year old boys, be a fairly robust and safe design.

Anybody have any free plans that would be suitable for this project?

2007-10-01 03:42:01 · 2 answers · asked by Anonymous in Engineering

x - 2 over 2-x

and

x-1 over x^ minus 1

2007-10-01 03:40:09 · 5 answers · asked by Anonymous in Mathematics

A high school soccer team is going to Columbus to see a professional soccer game. A coordinate grid is superimposed on a highway map of Ohio. The high school is at point (3, 4) and the stadium in Columbus is at point (7, 1). The map shows a highway rest stop halfway between the cities. What are the coordinates of the rest stop? What is the approximate distance between the high school and the stadium? (One unit i0000001.gif 2.7 miles.)

2007-10-01 03:35:25 · 4 answers · asked by Anonymous in Mathematics

M is the midpoint of CF for the points C(3, 7) and F(9, 3). Find MF.

2007-10-01 03:34:33 · 5 answers · asked by Anonymous in Mathematics

Basically, I'm having a momentary elapse, and need to know, why:

when y = k (k is a constant, e.g 1, 4, 2849438918503..e.c.t)

when differentiate it,

why is it that y' = 0.

Please explain it to me in words. Because if you pull down the power, its to the power of 0, and that should just turn it into a 1 rite xD?

2007-10-01 03:31:30 · 5 answers · asked by Suki 4 in Mathematics

2007-10-01 03:30:35 · 3 answers · asked by darkraven_222000 1 in Chemistry

2007-10-01 03:30:09 · 9 answers · asked by Anonymous in Mathematics

Jupiter is the largest planet in our solar system, having a mass and radius that are, respectively, 318 and 11.2 times that of earth. Suppose than an object fallsfrom rest near the surface of each planet and that acceleration due to gravity remains constant during the fall. Each object falls to the same distance. Determine the ratio of the time of fall on Jupiter than that to Earth.

2007-10-01 03:29:51 · 3 answers · asked by Ariel 2 in Physics

Just curious...

2007-10-01 03:25:23 · 9 answers · asked by Anonymous in Biology

2007-10-01 03:22:05 · 3 answers · asked by jnester0289 1 in Chemistry