How does a match stick be lit up with a magnifying glass?

It is actually possible to lit up a matchstick with a magnifying glass.
When we focus the light rays at one particular point of the magnifying glass, and it will pass through, reaching on the tip of the matchstick.
The heat and friction caused by the light rays will heat up the matchstick.

Matchstick is made up of solidified mixture of flammable chemicals.
The matchstick is able to light up because,the friction caused generates enough heat to ignite the chemical and produce a small flame.

Physics Graded Assignment (REG NO. 04)

1. How many images would you get for an object that is placed between two mirrors placed at an angle less than 90 degrees?

I should get 3 images.


2. What happens to the images of this angle if it is bigger than 90 degrees?

There will be lesser images produced.


3. How do mirrors produce funny images?

There are different types of mirrors, Concave and Convex. Concave mirrors will make us look slimmer as it is curved inwards. Convex mirrors will be the opposite, making us look fatter because it tends to pop out.

E-learning assignment Part 2. Reg. 04

Question: what would happen if the freezing point of water became 10 degrees C?

credits; as labeled: www.images.google.com.sg

The ice will float, covering the water underneath it.

In the colder countries like Korea, China and Taiwan, their water supply may be cut off as the water has already been frozen. There are more colder countries like Greenland and Canada. These countries may be freeze permanently as their average temperature is about -5.6 .

Water is the most abundant compound on Earth, constituting around 70 percent of the planet. If the water on Earth is to be freeze, the water for drinking will be lesser.

Invention of Internet

Credits; as labeled: www.ideafinder.com/history/inventions/internet.htm

The internet is a worldwide network of thousands of computers and networks. Vinton Cerf, an American computer scientist, developed The Internet and Transmission Control Protocols. It was found in 1973. He was sponsored by the United States Department of Defense Advance Research Project Agency (ARPA) and directed by an American engineer, Robert Kahn.

ARPA (ARPAnet) was the first internet, then the World Wide Web (WWW) was developed in 1989 by an English computer scientist, Timothy Berners-Lee.

"The design of the internet was done in 1973. Prior to that, a number of demonstrations were made of the technology - such as the first three- network interconnection demonstrated in November 1977 linking SATNET, PRNET and ARPANET in a path leading from Menlo Park, CA to University College London and back to USC/ISI in Marina del Rey, CA" - Vinton Cerf explained the timing.

In early 1996, more than 25 million computers interconnected with the Internet over 180 countries. It had been growing at a dramatic rate since then.

The Internet Protocol is a software used to control over the internet. Transmission Control Protocol, checks on whether the information had arrived at the destination computer, if it's not, the information will be resent.