Science & Mathematics - 19 October 2006

The cannonball has a speed of 133 m/s after it left the barrel. The cannon carriage is on a flat platform and is free to roll horizontally.
What is the speed of the cannon just after it was fired in units of m/s?

Assume the same explosive charge is used and the total energy of the cannon plus the cannonball system remains the same. Disregard friction. How much FASTER would the ball travel if the cannon was mounted rigidly but all other parameters were the same (in units of m/s)?

2006-10-19 08:32:03 · 4 answers · asked by Dee 4 in Physics

2006-10-19 08:27:06 · 2 answers · asked by steve_george1984 1 in Other - Science

How far away is our moon from Earth?

2006-10-19 08:26:51 · 10 answers · asked by Brian G 1 in Astronomy & Space

2006-10-19 08:25:20 · 3 answers · asked by id4rob 1 in Engineering

2006-10-19 08:24:55 · 7 answers · asked by mingo3doh 1 in Physics

How many miles/lilometers is Mars from Earth?

2006-10-19 08:24:42 · 5 answers · asked by Brian G 1 in Astronomy & Space

2006-10-19 08:24:13 · 5 answers · asked by siddiq m 1 in Geography

2006-10-19 08:21:50 · 22 answers · asked by j d 1 in Physics

When someone says daddy-long-legs are they talking about the spiders or the flies?

What are the correct names for the daddy-long-leg flies?
What are the correct names for the daddy-long-leg spiders?

I'm petrified of the flies, really, but I have no real issues with the spiders (although they do remind me of the daddy-long-leg flies…as do giraffes), everyone seems to get the two confused, even when I specify I mean the flying evils – a lot of people think they are the same thing, only one flies and one does not.

To clarify;

Fly - http://www.fliegenshop.at/images/daddylonglegs.jpg
Spider - http://newton-i.usefilm.com/8/2/0/820/209941-small.jpg

2006-10-19 08:20:57 · 21 answers · asked by Kasha 7 in Zoology

the life cycle is caterpillar to chrysalis to butterfly...inside the cocoon the caterpillar totally disolves etc and I cant see how it could evolve...this is a real question purely through interest and it's a good question

2006-10-19 08:19:47 · 11 answers · asked by mark b 2 in Other - Science

An unmarked police car, traveling a constant 87.0 km/hr, is passed by a speeder traveling 151 km/hr. Precisely 1.44 s after the speeder passes, the policeman steps on the accelerator. If the police car's acceleration is 2.08 m/s2, how much time elapses after the police car is passed until it overtakes the speeder (assumed moving at constant speed)?

How would you solve this problem?

2006-10-19 08:19:00 · 4 answers · asked by beautyqueenjustine 3 in Physics

Have you ever watch the clouds go by and ponder about something, then notice a particular cloud is shaped like a rabbit or ......

No insults or dirty minded thoughts!

2006-10-19 08:16:15 · 10 answers · asked by Anonymous in Weather

2006-10-19 08:15:51 · 4 answers · asked by Anonymous in Biology

What are the best lights under which to grow plants (specifically orchids and LEGAL house plants)? How close to the plants should the lights be placed?

2006-10-19 08:13:58 · 3 answers · asked by Anonymous in Other - Science

Transportation techniques mean that we are all potential part of a global breeding pool. This would seem to ensure that the basic human set of genes is perpetuated.
Given that evolution requires seperation, adaptation and selection do we now need barriers of our own creation (race, religion or political) to evolve?
Furthermore do we need to evolve?

2006-10-19 08:13:26 · 4 answers · asked by Edit_Cat 2 in Biology

a car can drive 5 miles in 45 minutes? what is the average speed in miles per hour?

2006-10-19 08:12:36 · 9 answers · asked by eyepublishing 2 in Mathematics

2006-10-19 08:12:19 · 5 answers · asked by ted 1 in Astronomy & Space

Can any one give me information on the alloy, that is added in stainless steel, to make it detectable by x rays .. ?

2006-10-19 08:08:53 · 6 answers · asked by Anonymous in Chemistry

2006-10-19 08:07:51 · 14 answers · asked by clairesecret74 1 in Astronomy & Space

Which way should my ceiling fan be turning to push the warm air down? Clockwise or counterclockwise?

2006-10-19 08:06:46 · 8 answers · asked by Anonymous in Other - Science

can a ship ship with poeple on it live far away from a sun. can you live out side of a galaxie? on a ship?

2006-10-19 08:05:28 · 8 answers · asked by Anonymous in Astronomy & Space

What is the partial fx(x,y,z,w,p,q,r) of cos(16r^2 + 4x^7p^4q^5) + e^(y^2zw)

I got -sin(16r^2 + 4x^7p^4q^5)*28p^4q^5x^6

But for some reason i just think its not right. Anyone know?

2006-10-19 08:01:40 · 5 answers · asked by Wayne Woj 1 in Mathematics

2006-10-19 07:59:15 · 18 answers · asked by Anonymous in Geography

2006-10-19 07:57:34 · 11 answers · asked by ted 1 in Earth Sciences & Geology

im at school and one of my friends is wondering

2006-10-19 07:56:46 · 6 answers · asked by Anonymous in Mathematics

in kilometers

2006-10-19 07:56:10 · 10 answers · asked by Anonymous in Astronomy & Space

Find the formula of a quadratic equation whose vertex is (-3,9) and passes through the point (1,41).

(The awkward wording is due to my shoddy spanish-to-english translation.) I have no idea how to do this, but I did manage to work out another coordinate: (-7,41), although I'm not sure if this is correct. Thanks for all help!

2006-10-19 07:56:10 · 3 answers · asked by Raqui 1 in Mathematics

2006-10-19 07:52:38 · 5 answers · asked by Anonymous in Engineering

What do they use? How can they be sure it will erode away? What are thier Islands made from? Have you ever been there to that Palm-tree shaped Island?

2006-10-19 07:51:19 · 4 answers · asked by Anonymous in Engineering

AAA is smaller than AA and there are others not common on the market of different sizes and shapes. Why are batteries different sizes? Does it really make a difference regarding the function of a gadget? The AAA battery has the same voltage as the AAA.

2006-10-19 07:50:23 · 6 answers · asked by devotionalservice 4 in Engineering