Physics graded assignment.

1. When an object is place between two mirrors placed at an angle at 90 degrees you will see 2 images of the object. But when the angle of the two mirrors decreases, you can see multiple reflection of the object. When the mirrors are held at certain very exact angle you will see 4,6,8 reflection of the object.

http://www.arvindguptatoys.com/arvindgupta/mirrorsbz.pdf

2. If the angle between the two mirrors increases( is more than 90 degrees) the images will display different view of the object.

3. How do mirrors produce funny images? mirrors of different shape have different geometrical properties. For example concave mirror stretches your image sideway to produce a rather fat version of you. The concave mirror has a reflecting surface that bulges inward. Therefore, concave mirrors shows different image type depending on the distance between the object and the mirror. Meanwhile convex mirrors will produce a slimmer and taller version of you. A convex mirror is a curved mirror in which the reflective bulges towards the light source.

http://www.science.edu.sg/ssc/detailed.jsp?artid=3418&type=5&root=88&parent=115&cat=200

Nur Syakira Bte Zamri 3e3

Project for science chemistry.

Microwaved food is believed to contain microwaves. How safe is microwaved food ?

How safe is microwave food? Some people believe that the radiation produced by the microwave causes cancer. But is it true? Research have shown that the radiation produced by the microwave is non-ionizing(to convert partly to ions). As such it does not have the cancer risk associated with ionizing radiation such as x-ray and ultraviolet light. Microwaves are frequently used for reheating previously cooked food and contamination may not be killed if it does not reach the desired safe temperature. Thus, it may result in food borne diseases. During microwave cooking bacteria will also be destroyed so food cooked in the microwave is safe for consumption. The microwaved food is safe to some extend if it is used correctly. In my opinion, i think its perfectly safe to heat food that are meant to be heated in the microwave. But we do have to take into consideration takings meals that are microwaved are not as healthy as having a cook balance meal-you can control the amount of vegetable etc. For example cooking spinach in the microwave is good as it retain nearly all its folate. In comparison, it loses about 77 percent when cooked on a stove.

Meaning of ionizing is found in dictionary.com.

http://en.wikipedia.org/wiki/Microwave_oven

Microwave food is believed to contain microwaves. While some have agreed the microwave food do contain microwave others in the mean time have disagreed. If microwave food really do contain microwave then the singapore government should already impose ban to ban microwave from singapore. But there has been no evidence so far to support that microwave food would contain microwave that could potentially harm us all. Thus i thoroughly disagree that microwave food do not contain microwaves.

Nur Syakira Bte Zamri (10) 3e3

Assignment part 3

Facial Asymmetry is something that is inherent in mankind, that some researchers believe is controlled by the way the brain works. A child might have freer range of asymmetry because he has not trained his face to meet societal standards, unlike an adult, as the child is more "expressive."

Some argue that the

right side of the face is more consciously controlled in its expressiveness than the left side of the face, which is more spontaneous in its expressive movements. This is because the

right hemisphere of the brain is dominant in emotional expression, it is thus expected that the left side of the face should reveal more emotional intensity than the right side of the face.

Areas on the left were found to be significantly larger than those on the right in right-handers. Left-handers were inconsistent in facial asymmetry, but they tended to have larger facial areas on the right than the left. Sex was especially significant for left-handers.

Faces of men and women showed that half of his right hand over left, is more pronounced, which gives the face a more serious, courageous traits inherent in the male sex. The left half of face n the other hand shows no serious side contours, which gives it a soft, sleek curves and femininity.

http://www.alma.edu/departments/psychology/ST96COG/Facialasymmetry/Face.html

.http://www.bleaching-dental.com/articles/asymmetry_of_the_face_head_and_skull_man.html

http://www.ncbi.nlm.nih.gov/pubmed/9394222

Assignment Part 2

What would happen if the freezing point of water became 10 degrees C?

Freezing is the process in which a liquid turns into a solid when cold enough. The freezing point is the temperature at which this happens. In this case, water will freeze at 10°C,

Normally, water freezes at 0°C. Countries with temperatures near this would be affected with their water turning into ice, such as the South Pole or Alaska as this countries live in a temperature of less than 0 degree Celsius. however, making the freezing point lower would be dangerous for the delicate balance of our ecosystem, where more water would freeze up, cutting water supply in areas such as Greenland. this is because water is denser than ice and the ice would float on the water, making access to water difficult. moreover, i think that it would be colder if this were to happen.

Assignment Part 1

The Aeroplane. In December 17 1903, Orville and Wilbur Wright, better know as the Wright Brothers made the first successful powered flight in history! The place was Kitty Hawk, North Carolina. The Wright Brothers' dream of inventing a flying machine had come true.

It all started when Orville was 7 and Wilbur was 11 years old. Their father, Bishop Milton Wright, gave them a toy helicopter that actually flew. That toy made them dream of flying. Their parents helped them go after their dreams.

Their first flight lasted 12 seconds. It went 120 feet. Their second and third flights went up about 175 feet each. Wilbur flew the fourth flight of the day. It went 859 feet. It took 59 seconds. After that last flight, the wind blew very hard. It blew the Flyer across the sand. The plane was too smashed up to fly again. The Wright Brothers however, kept studying and testing new designs. They wanted to make their Flyer better. After they were successful, they began to teach others to fly, even opening their own flying school. They are will continue to be role models for many out there with impossible dreams of their own.

The fascinating aspect that blew my mind away was the fact that humans could actually have the ability to be in the air, as opposed to being bounded by gravity and stuck to the ground. this was a momentous occasion in history that had lead to other, more sophisticated versions of the plane. another aspect that blew my mind was the dedication shown by the Wright brothers, they persevered and did not give up, successfully achieving their dreams.