How does a match stick light up by using magnifying glass.

The magnifying glass is a convex lens. It can be used to make the obeject look bigger or a concentrator of the sun rays for heating and fire lighting purposes. When the magnifying glass is place on top of the match, it would form a small point of light on the tip of the match stick. If the match stick is dry, together with the strong sun rays and the focal strength of the lens is adequate, the match stick will ignite as sufficient amount of heat and light is needed to ignite the match stick.

Physics Graded Assignment

Q1) How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

You would see 2 images. When the degree get lesser, more images are formed.

Q2) What happens to the images of this angle is it is bigger than 90(degrees)?

The image produced on the mirror would have different views.

Q3) How do mirrors produce funny images?

There are different types if mirrors. There are plane, convex and concave. The convex mirror reflects light out. So it make the objects look closer. The concave mirror is bend in and it reflects light inward to one focal point, it can show different images depending on the distance between the object and mirror. YongHao.

E-Learning Part 3

1) Sunlight is able to bleach wood, and decompose plastic. It is able to make our hair grow lighter as the sunlight break down the molecular layer of the hair. The molecular layer helps to absorb the heat and light from the sunlight, without it, our hair would not be able to absorb the heat and light, thus our hair will grow lighter. Our skin darkens under the sunlight is because it prevent our skin from getting whiter, like our hair. 2) The vegetable stores oil in them to act as a source of energy to them. They would use it when they do not have enough energy. Vegetable oil is called that because of it does not contain any animal oil, and the vegetable oil is mostly unsaturated. So it stills contain fats but more heathly. 3) If the cockroach's head is cut off, it can still survive for a long time, maybe even for a month. Their nose also are not located at their head, so even after cutting off their head, they can breath through spiracles which are in each body segments. The spiracles then transport the air through a set of tubes called tracheae. The brain do not control the spiracles, so it can move freely. The blood do not carry oxygen to the tissue and the cockroach do not have blood pressure like mammal so it would not lose much blood if one part of the body is cut off. The cockroach do not need much food when they are inactive. A meal for them can last for about a month if the cockroach is not extremely active. If the cockroach do not have a head, it would just stay at a spot, not moving. The cockroach can swim and hold its breath for 40 minutes as it breath through its side, not their nose, so it is easier for them. YongHao.

E-Learning Part 2

The animal looks abit like a frog, as it has webbed feets. The feets enable the animal to swim faster than normal aquatic animals. It seems to have spikes on the back of the body, and probably it is to prevent animals from attacking it. It also have a long tail behind, it might help the animal to swim faster. It also had large ears like elephants, it probably can cool down the heat of the animal. It has a long nose and probably can smell its prey from long distance. The height of it is 50cm so it can be quite small as compared to a standing human. It has a long tongue, which looks like a frog, it probably eats the insect. From the appearance, it looks like it live in a swamp or dense area, as it has webbed feets to swim faster and long tongue to eat its prey such as flies. It is probably the predator of flying insects and the predator probably is crocodile. So, i feel that this animal looks weird. Yong Hao.

Invention of airplane

The invention of airplane has made an impact in all our lives. The invention of airplanes is around December 1903. That is when the Wright Brothers created the first airplane. From then, the old airplane evolved into our modern airplane. Example of modern airplanes is A380. Airplanes helped us in many ways; it can help us to transport goods faster. The process of building a plane is difficult as to make a big metal to fly in the air would be extremely diffcult. One important part of an airplane is the wing. The wing can control where the direction of plane is going. The most important part is the jet engine, as without the jet engine, the plane would not be able to fly in the air. So, electricity in modern days in extremely important.