How to light up a match stick using a magnifying glass

Angle the lens towards the sun in order to focus the beam into as small an area as possible. The sun ray will focus into one focal point.

Put the match stick under the spot and the heat will soon light up the match stick.

http://artofmanliness.com/2008/04/29/9-ways-to-start-a-fire-without-matches/

Physics (#12)

1) How many images an object would have if you place it between two mirrors placed at an angle less than 90 degrees?
2) What happens to the image of the angle is bigger than 90 degrees?
3) How do mirrors produce funny images?

1. There will be 2 images.


3. The surface of the mirror is not flat thus causing light ray to reflect at different angle . The image produced will then be distorted.



http://wiki.answers.com/Q/How_many_images_formed_when_two_mirrors_are_at_90_degree_angle&alreadyAsked=1&rtitle=How_many_images_will_be_formed_when_two_mirror

http://answers.yahoo.com/question/index?qid=20070531140400AADKMfH

Assignment part3

No, the temperature cycle is the same.Age, level of activity and health conditions are the factors affecting the body temperature.Yes the outside weather conditions affect body temperature.Under a hot weather a person's body temperature rises.Elderly do not regulate their bod temperature well like how adults does. Body temperature of an individual decreases as they grow older. Exercising at different times of the day will also affect our body temperature. Our body temperature is lowest at 3 am , and it is highest at 6 pm. The higher the level of activity, the higher the body temperature is. The body temperature affects our mood , when our body temperature is high we tend to be irritated and angry causing us to be unable to concentrate well.

http://www.tpub.com/content/armymedical/MD0531/MD05310021.htm

Assignment Part2

What would be the effect if a spaceship landed, and the aliens in it estimate that they are 400 years ahead of us. What would happen if they offered us all their scientific knowledge? Would it be good or bad? Why?

I think it be bad if they offer us all their scientific knowledge as they are way ahead of us. 400 years of science knowledge is a lot, Earth might not be able to accept it. There might even be more destruction in Earth. Though they might have medicines that can cure many illnesses but it might be too strong for the human body to manage.

-Regina

Discovery of DNA

DNA was first noticed by a Swiss physician Friedrich Miescher. He discovered a microscopic substance in the pus of discarded surgical surgical bandages in 1869.
Deoxyribonucleic acid known as DNA. DNA molecules is the longterm storage of information. Genes are the DNA segments that carry genetic information.
Chemically, DNA consist of two long polymers of simple units, nucleotides and phosphate. Within cells DNA is organized into chromosomes.
I think is very fascinating to know how DNA contains our genes and it can help people to identify who are their real parents.