Its About Computer In Science: February 2014

Thursday 20 February 2014

ChemSketch

Assalamualaikum and happy holiday readers!!! Yeahh, weekend comes again :)

This week, we want to share with you about Chem Sketch. do you know what is chem sketch?

ACD/ChemSketch is a drawing package software that allows us to draw chemical structures including organic, organometallics, polymers and Markush structures. It also includes features such as calculation of molecular properties (e.g; molecular weight, density, molar refractivity and etc) and naming the structures. In our previous semester, Doctor Anwar had told us to install and use this software to draw the chemical molecules we never use it. Why?? Because we never know how this software is function. Such a weird software for us!

Now, let's us try this software by drawing the structure of propane (CH₃CH₂CH₃).

1) Before we started to use it, we must install it first in our laptop.

You may click this link below to direct download

MY CHEMSKETCH DOWNLOAD

2) When the software is successfully download and install in your computer, click on the Chemsketch icon to open it. You will see a blank page.

3) The Draw Normal tool is the default tool when the program is started. We must ensure that the Draw Normal is enabled on the Structure tool bar. Next, the Carbon (C) atom is selected on the Atoms tool bar.

4) Click in an empty space to draw CH₄
5) Click CH₄ to add a -CH₃group, creating CH₃-CH₃with a standard bond length.

6) If you want to draw double and triple bonds, click the selected bond to make double and click twice to place a triple bond.

Here are the other examples that you can try by using the the chemsketch.

Name	Molecular formula
Hexane	CH3CH2CH2CH2CH2CH3
Butene	CH2CHCH2CH3
Pentanol/td>	CH3CH2CH2CH2CH2OH
Benzene	C6H6
Methanoic acid	CH2O2

Before we stop, we give you this tutorial as your guidelines to explore the ChemSketch software.

The Tutorial

Hope you are enjoy it, bye.

Friday 14 February 2014

HTML Lessons :)

Assalamualaikum and have a nice weekend all readers? How is your days passed along this week? Is it terrible, tired or very leisure?

Stop condemning and let’s continue to our main topic. This week during computer in science class, we have learnt something new and very interesting topic. And very annoying too! We cannot deny it for the first time. Madam Linda had taught us about HTML. Do you know what is HTML? Have you heard about this term before?

HTML or Hyper Text Markup Language is the main markup language for creating web pages and other information that can be displayed in a web browser. HTML documents contain HTML tags and plain text. HTML is written in the form oh HTML elements that consisting of tags enclosed in angle bracket such as <html>, within the web page content.

Before we start learning about HTML, we need to;

1) Open up a plain text editor to write our HTML language like notepad or etc.

2) Once the notepad icon is open, you will see such a blank page that you need to need to write the text.

3) Then you can start typing your html codes on it. For the new starters, we will teach you to make a simple code first. Let us try!

Coding: (intro)

<html>

<body>

<h1> My First Heading </h1>

<p> My First Paragraph </p>

</body>

</html>

4) Lastly, you need to save the notepad in two version; intro txt and intro.html. You need to choose your web browser such as Mozilla Firefox or Google Chrome in order to test your html.

Does it make your adrenaline running fast? Are you interested to learn more? for your information, HTML codes can be used to form table, list of things, inserting moving or non-moving images, or get through a link. Here are some examples that, you can try by yourself.

1) Coding: (formed a table)

<html>

<body>

<html>

<body>

<h4>With cell padding:</h4>

<table border="1"

cellpadding="10">

<tr>

<td>Address</td>

<td>Hobby</td>

</tr>

<tr>

<td>Noor Hafiza binti Yahya</td>

<td>Tanjung Lumpur, Pahang</td>

<td>Reading novels</td>

</tr>

<tr>

<td>Noor Fatinie binti Mohd Zohan</td>

<td>Bachok, Kelantan</td>

<td>Cooking</td>

</tr>

</table>

</body>

</html>

Name	Address	Hobby
Noor Hafiza binti Yahya	Tanjung Lumpur, Pahang	Reading novels
Noor Fatinie binti Mohd Zohan	Bachok, Kelantan	Cooking

2) Coding: (get trough a link)

<html>

<body>

<p>

<a href="https://www.facebook.com/">See also my facebook.</a>

</p>

</html>

Wednesday 5 February 2014

Concept in Physics

Hello everyone.

Do you know about physics? have any idea??

Physics is a branch of science that concerned with the nature and properties of matter and energy. the subject matter of physics distinguished from that of chemistry and biology. The basic knowledge of Physics we must know about the SI unit, standard prefixes and also the conversion unit. SI unit or the International System of Units is the modern form of the metric system and is the world's most widely used system of measurement. The basic SI units are as follows;

Quantities	SI Unit
Length	Meter (m)
Mass	Kilogram (kg)
Time	Second (s)
Electric Current	Ampere (A)
Temperature	Kelvin (K)

The standard prefixes are used to form decimal multiples and sub multiples of SI units as in the table below;

The study of conversion units are applied when the units given are not consistent, thus we need to convert to appropriate ones. Units can be treated like algebraic quantities that can cancel each other out.
For example;

Next, we learn about the Newton's Law :)
In this topic we must master about forces and mass. Force is an action that can change motion. Force can be used to increase the speed of an object, decreased the speed of an object or change the direction in which an object is moving.

Newton's First Law

Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

Newton's Second Law

The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.

Newton's Third Law

For every action there is an equal and opposite reaction.