## AM4R's Content

There have been 101 items by AM4R (Search limited from 29-June 21)

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### #90827What is SHM?

Posted by on 08 November 2006 - 08:05 PM in Physics

We are doing this at school just now, and there are so many different formulas I get so confused which one to use???

### #81572What did you do?

Posted by on 25 May 2006 - 10:39 AM in English

wow, what a topic, I thought i did ok in the exam but dropped quite a few marks in the close reading

### #92398What are you listening to?

Posted by on 29 December 2006 - 12:09 PM in General Chat

Keanes new song is ace - a bad dream

so is klaxons - golden skans

Posted by on 08 November 2006 - 10:56 PM in General Chat

me 2,

Whats happening to us????

### #97600THE EXAM!

Posted by on 15 May 2007 - 03:27 PM in Mathematics

So what did you all think of it??

I personally thought it was really hard, any ideas what the grade boundaries might look like???

### #90847Substitution

Posted by on 08 November 2006 - 10:40 PM in Mathematics

yeah I thats what i thought but it says in the question to use the substitution.

### #90835Substitution

Posted by on 08 November 2006 - 10:01 PM in Mathematics

Heres another question im stuck on!! Can anyone help?

use the subst. x=4sin t to evaluate the definite integral:

(integration sign with 2 at top of it and 0 at bottom) x+1/square root 16-x^2

i think that might be hard to read

Thanks

### #90843Substitution

Posted by on 08 November 2006 - 10:33 PM in Mathematics

nice one

So any chance with help, lol?

### #90839Substitution

Posted by on 08 November 2006 - 10:27 PM in Mathematics

yeah exactly

How u do that? lol

### #90849Substitution

Posted by on 08 November 2006 - 10:51 PM in Mathematics

ahh right!!! thanks alot Wedge

done it! thanks

### #81288Student Jobs

Posted by on 24 May 2006 - 10:37 AM in General Chat

Where do you work?

A smaller version of Sainsburys
Are you at school or university?
School
How many hours per week do you work?
12 hrs but full time (45hrs) in the summer for 3 weeks
How much do you earn per hour?
£4.85
Yes but can get boring

### #97316Stuck help

Posted by on 14 May 2007 - 09:38 AM in Physics

### #97074Stuck help

Posted by on 11 May 2007 - 05:05 PM in Physics

Im stuck on these questions. Can someone help?

1. An alpha particle with velocity of 2 x10^6 is fired at a target of gold foil in a vacuum. The mass of the alpha particle is 6.7 x 10^-27 and the atomic number for gold is 79.

Calculate the distance of closest approach.

2. r^3 = Gm/4pie^2 (T^2)

The orbital period of a geostationary satellite is equal to the period of rotation of the earth about its axis.

Calculate

the height of the satellite above the earths surface.
the speed of the satellite in its orbit.

Thanks

### #81834Standard Algorithms

Posted by on 26 May 2006 - 12:13 PM in Computing

sure,

Finding min

Set first to lowest in list
repeat
if next in list<min
make min = next in list
found_at=counter
until end of list
write minimum

Finding Max

same as above but change min to max, and < into>

Counting Occurences

target = 'random'
counter = 0
repeat
if next in value = targer
then counter = counter + 1
until end of list
write counter

I think thats what you wanted

EDIT: just typed that for nothing, lol

### #81862Results

Posted by on 26 May 2006 - 12:59 PM in Revision and Exams

Whats the date that we get our results this year?

### #81134Quick Facts

Posted by on 23 May 2006 - 05:22 PM in Chemistry

QUOTE(Pammy @ May 23 2006, 06:01 PM)

This is one of the summary sheets I have written for myself and thought I would share it with you

In equilibrium reactions
* low temperature favours the exothermic reaction
* high pressure favours the reaction where less gas molecules are formed

If in an equation you see H O (g) you need to be aware that the temp. must be above 100 degrees as it it normally liquid !!

Water and Ammonia are polar (although I think they shouldn't be!!)

All ionic compunds are solid at room temperature

"Like dissolves like" - why alcohol and water mix (both polar covalent) and why oil (covalent) and water(polar covalent) don't mix.

Kevlar is an aromatic polyamide and contains hydrogen bonding

Giant covalent Network- Silicon dioxide(sand/glass), diamond

All fats are esters

One mole of any gas, under the same temperature and pressure, has the same mole of any other gas.

Volumes of gases are proportional to the number of moles present.

Nice one Pammy!

### #81150Quick Facts

Posted by on 23 May 2006 - 05:48 PM in Chemistry

just came into my head, what is displacement again?

alsooooooooo we will need to know all the calculations!

### #81165Quick Facts

Posted by on 23 May 2006 - 06:25 PM in Chemistry

got ya! Thanks

### #81769PPA Hints

Posted by on 26 May 2006 - 09:12 AM in Chemistry

QUOTE(someone11 @ May 26 2006, 09:30 AM)

whats the sulphuric acid for??

acts as an catalyst and stops the reversable reaction........i think

Posted by on 21 January 2007 - 09:56 PM in General Chat

Where is everyone getting Vista from?????

Posted by on 26 May 2006 - 12:18 PM in General Chat

QUOTE(bred @ Apr 2 2006, 04:56 PM)

Cheers Khalid. Here are some photos from Barcelona last week: http://ed.facebook.com/album.php?aid=20209...157&id=61001455

barcelona is a brilliant city, probably one of favs if not my fav. Sagrada familia and park guell are amazing. So is La Ramblas, the big man street with all the trees! Night life is good too.

### #81829Past Papers!

Posted by on 26 May 2006 - 12:08 PM in Chemistry

same here

### #83074New look website

Posted by on 05 June 2006 - 07:26 PM in Website

looks nice and fresh now

### #81889Multiple Choice 06

Posted by on 26 May 2006 - 02:06 PM in Chemistry

Denaturing moleclues can come up to. That means the shape is changed.

### #81828Multiple Choice 06

Posted by on 26 May 2006 - 12:07 PM in Chemistry

Since most of the questions in multiple choice is the same every year i thought we should make a thread where we put all the questions that will probably come up, as they did before?

Dunno if this is gonna work,lol