Science & Mathematics - 8 July 2007

Consider the inelastic collision between two objects (A and B). Object A has a mass of 12 kg. and is moving at 8 m/s. Object B has a mass of 4 kg. and is moving at 15 m/s toward object A (Objects A and B are moving towards each other).

(a) What is the velocity and direction of the wreakage after the inelastic collision?



(b)How much energy is dissipated as heat ?

2007-07-08 08:18:57 · 4 answers · asked by ted 1 in Physics

2007-07-08 08:17:04 · 2 answers · asked by stefan b 1 in Engineering

to design an experiment which predicts the true nature of decays.

Or is it like predicting Earthquakes?

2007-07-08 08:14:45 · 4 answers · asked by Anonymous in Physics

i went on vacations to Mexico and my grandma's house is really really old..they were doing some maintenance in the backyard and they were digging. My aunt was digging too and she found a bar..it looked all dirty but when we cleaned it it was shiny and silver like. It is super heavy..its like the heaviest thing ever and its not even that big. It has some letters (k 100) and star on it. and when i touch it it stains my fingers black....i dont know what it is....what could it possibly be????

2007-07-08 08:11:42 · 11 answers · asked by Vegetarian Princess 3 in Earth Sciences & Geology

And where would I find information like this Online?

2007-07-08 08:08:45 · 4 answers · asked by Marie Q 2 in Chemistry

2007-07-08 08:08:28 · 1 answers · asked by rvbadagli 2 in Engineering

It seems like space would work like a giant thermos. With nothing to transfer heat away, how come Apollo 13 became so cold when the heaters were turned off?

2007-07-08 08:02:22 · 9 answers · asked by yatpay 1 in Physics

I have read several different articles about fizeau's experiment and I understand most of the concept but I would like to know how he acually did it. In explaining please answer these questions:
-what type of light source did he use?
-was the light source pulsating or was it continuous?
-If the cog is spinning so fast and had hundreds of teeth, how can he determine if light passes through the same spacing?

2007-07-08 07:58:17 · 5 answers · asked by physical 4 in Physics

2007-07-08 07:57:09 · 14 answers · asked by steeley 3 in Earth Sciences & Geology

In film Printing M/c this type of break used pl write me to about this

2007-07-08 07:55:37 · 2 answers · asked by rajesh c 1 in Physics

2007-07-08 07:52:47 · 10 answers · asked by Anonymous in Medicine

2007-07-08 07:48:30 · 4 answers · asked by Romeotheriault 1 in Mathematics

Identify the noble gas associated with each ion: Ca 2+; Li + and Mg 2+ (the numbers and charge are supposed to be small and in the upper right corner)

2007-07-08 07:47:39 · 3 answers · asked by mlssa_mllr 2 in Chemistry

2007-07-08 07:45:51 · 6 answers · asked by Danan J 2 in Physics

Sara take 3hr longer to paint a floor than it takes Kate. When they work together, it takes them 2hrs. how long would each take to do the job alone.

2007-07-08 07:44:12 · 9 answers · asked by jesis332 1 in Mathematics

2007-07-08 07:39:44 · 8 answers · asked by Dee 3 in Geography

2007-07-08 07:36:14 · 8 answers · asked by lykastar 3 in Mathematics

2007-07-08 07:35:22 · 2 answers · asked by Anonymous in Chemistry

I don't live in areas prone to strong winds but am surprised to hear amazing things that can happen, like a full-grown cow that is lifted into the air and lands in somebody else's garden or vehicles that are rolled some distance away.

Can you share some survival tips on encountering one?

2007-07-08 07:34:36 · 3 answers · asked by Dolphin-Bird Lover8-88 7 in Weather

A triangular tile measures ½ ft, ¾ ft and 1 ft on its three sides. Is it a right triangle? Explain.

2007-07-08 07:30:52 · 5 answers · asked by wastedmemoriez 1 in Mathematics

okay i have to do a poster showing that i understand a standard from a worksheet. it is a project.

can anyone help me figure out understanding this standard.




a. Students know biodiversity is the sum total of different kinds of organisms and is affected by alterations of habitats.

2007-07-08 07:28:45 · 1 answers · asked by Anonymous in Biology

The length of a rectangle is (x^2-2x-1) feet and the width is (2x + 3) feet. Express the area as a polynomial.

A right triangle has one leg that is x feet long and another leg that is x+2 feet long. The hypotenuse is 2x-7 feet long. What are the sides of the triangle? (Round to 2 decimal places.)

2007-07-08 07:27:57 · 5 answers · asked by wastedmemoriez 1 in Mathematics

2007-07-08 07:18:32 · 8 answers · asked by shelley3549 1 in Weather

I think the chicken came first because if the T-Rex laid a bad egg it probably came out as a dinosaur chicken then evolved from there. What do you guys think?

2007-07-08 07:04:30 · 8 answers · asked by Anonymous in Zoology

Adult tickets for a play cost $14 and child tickets cost $4. If there were 27 people at a performance and the theater collected $298 from ticket sales, how many children attended the play?

2007-07-08 06:59:01 · 5 answers · asked by Anonymous in Mathematics

Are they good for something? or is it just God showing us that the world isnt perfect :P

2007-07-08 06:57:38 · 5 answers · asked by Guido~CdubZ 2 in Zoology

I saw one by my house but I didn't get a very good look at it...and I'm a little concerned.

2007-07-08 06:57:07 · 2 answers · asked by Anonymous in Zoology

How i can do it?

2007-07-08 06:56:09 · 1 answers · asked by must 3 in Mathematics

2007-07-08 06:51:57 · 7 answers · asked by chica 2 in Earth Sciences & Geology

pure liquid would do?

2007-07-08 06:48:21 · 2 answers · asked by Anonymous in Chemistry