Science & Mathematics - 2 December 2006

A block of mass m = 2.02 kg slides down a 30.8 ° incline which is h = 3.46 m high. At the bottom, it strikes a block of mass M = 6.90 kg which is at rest on a horizontal surface (Assume a smooth transition at the bottom of the incline.)
If the collision is perfectly elastic, and friction can be ignored, what is the speed of the smaller block and larger block after the collision?

Determine how far back up the incline the smaller mass will go.

How would you work through this problem? Please Help!

2006-12-02 03:20:58 · 5 answers · asked by Isabel G 1 in Physics

1) (3r + 2 -s)(4r + 9 -s) = 0
2) (4r - 6 - s)(3r + 2 -s) = 0

Choice A: Statement 1 is sufficient by itself
Choice B: Statement 2 is sufficient by itself
Choise C: Need both statements together to find the answer
Choice D: Either statement is sufficient by itself
Choice E: Neither statement.

Please select the best choice for this question and explain why you picked it.

2006-12-02 03:20:02 · 7 answers · asked by ThinkProb 1 in Mathematics

Is there a formula similar to the quadratic formula, but for solving cubics?

2006-12-02 03:17:23 · 4 answers · asked by boredandgrumpy 1 in Mathematics

f(x)= -3(x-2)^2+1

2006-12-02 03:16:35 · 3 answers · asked by johnhildeb 3 in Mathematics

I don't get these questions. Can someone explain how to work it out please?

5. To make concrete you can mix 3 parts sand to 1 part cement. How much sand do you need to make 8 tonnes of concrete?

6. To make grey paint you can mix 3 parts black paint with 7 parts white paint. How much of each coloured paint do you need to make 20 litres of grey paint?

8. An alloy weighing 210g consists of copper, zinc and iron. There is three times as much copper as zinc and one and a half times as much zinc as iron. How much zinc is there?



Please be serious about this because this homework goes towards my ppm results.

2006-12-02 03:16:03 · 9 answers · asked by diamondeyesx 3 in Mathematics

2006-12-02 03:15:36 · 18 answers · asked by Tom L 1 in Mathematics

For this project it is required that the roller coaster has 2 full loops and also 2 hills. It cannot take up an area of greater then 75 cm x 75cm x 100 cm high. I could use some suggestions as to what material i should use as the track. ( It needs to be flexible enough to form the loops and hills.) Thanks for your help!!

2006-12-02 03:15:27 · 2 answers · asked by Anonymous in Engineering

2006-12-02 03:15:08 · 5 answers · asked by budak_lert86 1 in Engineering

conditions??

2006-12-02 03:14:21 · 9 answers · asked by forest lover 2 in Astronomy & Space

2006-12-02 03:09:50 · 13 answers · asked by austin w 1 in Weather

hi... im doing a case study which are comparison study on different switching techniques of inverters for my final year project. I need some information about switching tecniques.
The information that i need is about space vector modulation and total harmonic distortion (THD). Also simulation of the swicthing technique using simulink (Mathlab). I am having some difficulity to find the correct website where i can get some information about.. Someone please help me either by providing me the information that i need or give me the correct link for the websites where i can get the informations. I will be very grateful and thankful to the person who can help me.thanks

2006-12-02 03:06:40 · 1 answers · asked by guna l 1 in Engineering

Whereabouts in the world is Gulubú? Is it a country, a province or a town?

2006-12-02 03:04:43 · 3 answers · asked by Anonymous in Geography

Theoretical Question about water flow. Say I have 3/4 inch water lines in my house. I want to connect a new faucet 15 feet away from these lines. The faucet uses 1/2 inch lines. Does it matter where along that 15 feet that the transition from 3/4 inch to 1/2 inch is made? Will the amount of water output at the faucet change depending on where the transition is made?

2006-12-02 03:04:21 · 6 answers · asked by Karnak 3 in Engineering

2006-12-02 03:02:01 · 11 answers · asked by rick jameson 1 in Zoology

2006-12-02 02:57:52 · 10 answers · asked by chinnu 2 in Mathematics

2006-12-02 02:57:27 · 8 answers · asked by huong n 1 in Physics

is it possible in UK and do you agree? (seriously considering)

2006-12-02 02:53:43 · 16 answers · asked by Aaron B 3 in Other - Alternative

and if it is like a Tsunami how are they alike or different?

2006-12-02 02:51:59 · 7 answers · asked by Anonymous in Weather

I'm tied down locally on the first job but i could work through computer (eg, sci research, answering medical questions..etc)

2006-12-02 02:51:06 · 6 answers · asked by awillson5 1 in Medicine

2006-12-02 02:50:23 · 2 answers · asked by Char 2 in Chemistry

2006-12-02 02:44:49 · 7 answers · asked by angel 2 in Astronomy & Space

how many watts of electricity ia a man capable of producing by turning a handle or peddling a machine connected to an alternator

2006-12-02 02:43:45 · 8 answers · asked by rocky 3 in Engineering

dy/dx+1/x y= (1-x)y^2

x^2 d^2x/dy^2 =2xdx/dy=0

2006-12-02 02:41:21 · 4 answers · asked by Glendon 1 in Mathematics

need a name for a spce station going to pluto for a project

2006-12-02 02:40:56 · 15 answers · asked by ? 2 in Astronomy & Space

2006-12-02 02:37:41 · 3 answers · asked by Baek 1 in Physics

2006-12-02 02:35:25 · 4 answers · asked by bitrus d 1 in Physics

2006-12-02 02:33:48 · 15 answers · asked by LEGGS 1 in Weather

2006-12-02 02:30:33 · 6 answers · asked by Carpe Diem (Seize The Day) 6 in Mathematics

I have a math project every quarter and this quarter I have to make a "scrapbook" with all types of statistical graphs from magazines and online. If you can give me any information on sites and magazines that have a variety of graphs and charts of today's statistics, I would be grateful!

2006-12-02 02:30:31 · 2 answers · asked by poetic_power 3 in Mathematics

2006-12-02 02:29:27 · 8 answers · asked by Anonymous in Chemistry