Science & Mathematics - 20 October 2006

A centrifuge has a rotational inertia of 7.24 10-3 kg ·m2. How much energy must be supplied to bring it from rest to 535 rad/s?

2006-10-20 13:43:30 · 1 answers · asked by Anonymous in Physics

I need help to find what affect happens to a carrot when its placed in salt and tap water.

2006-10-20 13:37:21 · 4 answers · asked by Kedah<3 3 in Other - Science

2006-10-20 13:33:32 · 8 answers · asked by Andi 1 in Mathematics

would the Sun, moon, and Mars be?

Now, it does not have to be a baseball, but some other small object of familiar size (basketball, golf, whatever). I remember hearing something similar a long time ago, and being blown away. Its an interesting scale question.

2006-10-20 13:32:44 · 11 answers · asked by Crazy Eagle 3 in Astronomy & Space

I suppose you would need quite a space suit to survive the collision with the atmosphere.

2006-10-20 13:31:49 · 15 answers · asked by gregory_s19 3 in Astronomy & Space

or any general hoover daminfo welcome.

2006-10-20 13:28:23 · 11 answers · asked by thesubjective 1 in Engineering

I am looking for a purely objective scientic answer here, not opinion. The reason I am asking is because sometimes people refer to evolution as 'the theory of evolution' and other times I hear it refered to as 'a scientific proof'. Again, I'm not looking for a beliefe here, I just want to know, scientifically speaking, which one is it?

2006-10-20 13:24:56 · 5 answers · asked by lukestotler 1 in Biology

2006-10-20 13:23:37 · 4 answers · asked by nylove7729 1 in Biology

2006-10-20 13:23:31 · 14 answers · asked by sir j 1 in Physics

A BMW of mass 1.2 103 kg is traveling at 41 m/s. It approaches a 1.2 103 kg Volkswagen going 26 m/s in the same direction and strikes it in the rear. Neither driver applies the brakes. Neglect the relatively small frictional forces on the cars due to the road and due to air resistance. If the collision slows the BMW down to 32 m/s, what is the speed of the VW after the collision?

2006-10-20 13:22:31 · 3 answers · asked by Anonymous in Physics

In the railroad freight yard, an empty freight car of mass m rolls along a straight level track at 1 m/s and collides with an initially stationary, fully loaded boxcar of mass 3.5m. The two cars couple together upon collision.

(a) What is the magnitude of the velocity of the two cars after the collision?

(b) Suppose instead that the two cars are at rest after the collision. With what speed was the loaded boxcar moving before the collision if the empty one was moving at 1 m/s?

2006-10-20 13:21:57 · 1 answers · asked by Anonymous in Physics

suppose you know that h is an odd function, and that lim x->3+ h(x)=-5

2006-10-20 13:14:12 · 4 answers · asked by MJ 1 in Mathematics

ok im 13 so i dont know if this could happen im interested in this stuff well the animals are i think startin to figure out that its our fault for global warming the fish are affected by it bcuz of the "dead zones" and the sting rays i guess either figured it out first or wantin to take action do you think this could happen im serious

2006-10-20 13:07:48 · 12 answers · asked by Rawr! 2 in Zoology

Or am I special?

2006-10-20 13:07:39 · 9 answers · asked by Didgeridude 4 in Biology

You know how most meteors that enter earth's atmosphere burn up before they reach earth? The friction between the meteor and the atmosphere produces a great amount of heat. How is a space shuttle protected from friciton when it re-enters the earth's atmosphere?

2006-10-20 13:05:31 · 7 answers · asked by Andrea B 1 in Physics

the length of the base of an isosceles triangle is one third the length of one of its legs. If the perimetet of the triangle is 66 inches, what is the length of the base

2006-10-20 13:04:32 · 5 answers · asked by imo 1 in Mathematics

2006-10-20 13:04:21 · 12 answers · asked by sir j 1 in Astronomy & Space

Does anyone no where and when Hepatits B virus was discovered?

2006-10-20 13:03:11 · 1 answers · asked by no name 1 in Biology

-Did you know that 0^1 is greater than 0^0?
-Did you know there are more points in a circumference radius 2 than in a circumference with radius 1?
-Did you know that in Geometry is TRUE that ((a triangle is not a square) AND (a square is not a rectangle))?
-Did you know that (infinity + 1) is greater than just (infinity)?

2006-10-20 13:00:52 · 8 answers · asked by f_vidigal 1 in Mathematics

i need to motive a math lesson at the middle school level on this topic and i have no idea where to begin. transformations involve rotations, reflections,dilations and translations. so how does this apply to the real world. why should kids learn it???

2006-10-20 13:00:10 · 3 answers · asked by Anonymous in Mathematics

Is there any way that I can make a smoke with common house hold objects?

2006-10-20 12:59:20 · 2 answers · asked by timothy k 1 in Chemistry

For an eigth grade science project, we have to make a vehicle (Most likely car-like), and it has to be able to travel on its own.

It must be made from scratch.
No electricity--at all.
Must move on it's own. (No pushing, ramps, etc.)

I'm looking for any ideas on how to make it move? And please be specific. (Like how to use rubber bands to make it move, or maybe springs, fire, balloons, etc.)

The basic idea is to make the car with Newton's laws in mind. (Every action has an equal reaction, objects in motion stay in motion...)

2006-10-20 12:55:54 · 3 answers · asked by abcdefgh 2 in Engineering

2006-10-20 12:51:19 · 8 answers · asked by sir j 1 in Astronomy & Space

I dont see how it's possible that it could be those little red bugs because I havent spent any time outside lately

2006-10-20 12:51:12 · 14 answers · asked by Anonymous in Medicine

2006-10-20 12:49:42 · 6 answers · asked by stargazer 5 in Biology

At a party, there was one pizza for every 3 people, one salad for every 6 people, and one cake for every 8 people. If the total number of pizzas, salads, and cakes was n, in terms of n, how many people were at the party?

2006-10-20 12:49:31 · 6 answers · asked by liquid_force_evolution 2 in Mathematics

2006-10-20 12:49:02 · 3 answers · asked by megalomaniac 7 in Other - Science

Say the moon fell out of orbit, Earth fell or any of the other planets, how would it affect us?

2006-10-20 12:47:56 · 10 answers · asked by morgana_tyler 1 in Astronomy & Space

2006-10-20 12:40:53 · 29 answers · asked by drahcir_17 1 in Biology

2006-10-20 12:40:49 · 22 answers · asked by Anonymous in Other - Science