NOVA science

Welcome to the new season of Nova science.

First, we take a look about our solar system. It's a big, wide, open field with the sun in the middle and few starts around. These starts conform their own orbit. The scientist predicted that someday they will cross to each other.

Between the stars in our solar system are many asteroids move with giddy velocity. In 2004, the scientists found out a asteroid move in the sky and it seemed to be hit to the earth. The wide of it is thousand feet and if it hit to the earth, it would destroyed 80%-90% the life in the earth. And it probably true. Remember that 65 millions years ago, the same asteroids hit to the earth and made all the dinosaurs became extinct.

The scientists predicted that in Friday, 13th April, 2029, a asteroid named 99942 April will crash the earth. But NASA proved that it will not hit to the earth in 2029. It will hit straight to the earth in 2036 if it pass to the key hole. Its power equal 100 nuclear bombs at the same time and will create a hole with the measurement about 60-100 miles in the surface of the earth. NASA forecast that it will hit to the Pacific ocean and create a significant flood( 3,5h with waves 50 feet height and large) shut all the cost line of south California.

So, what can we do to safe the earth, safe the planet where we are living? The answer is use our brain, our knowledge to prevent it. The scientists give to us 2 methods to protect our plane. First one is use nuclear weapons to deflect the asteroid's orbit or make them slow enough to miss the earth. But if we want to do this, we have to know exactly the shape and structure of the asteroid. And unfortunately, we don't have enough information about this asteroid and it seem to be bad way to do this because we don't what happen next. The second methods is use a gravity machine to deflect it out of the earth. But not anyone agree with it. They admit that it's not time to spend million dollars to do this machine. They think that the thing we need to do now are searching and finding the uncover asteroids we have not know.

COMPUTER

Computer use in 2003

Nowadays, more and more people use computer and internet access, no mater their age: adults, older or children. The data show us the percentages of the people use them.

1. A/ The first data provide for us the percentages of the household used computer and internet access from 1984 to 2003.

v The percentages of households used computer increase 6%( growing from 56% to 62%) from 2001 to 2003. The proportion of households with internet access raise more than three times between 1997 and 2003(growing from18% to 56%).

v They were exerted widely, but use this technology is not similar among all groups. 35% of computers were found in household with a householder aged 65, 45% with a black or Hispanic householder, and 28% with a householder who wasn’t a high school graduate.

v 41% of one-person household and 46% of non-family have computers.

v 95% of the households which had an income over 100,000$ had at least one computer and 92% of them knew how to use.

v 41% of the households which had an income over 25,000$ own a computer and 31% of them had internet access.

v Three-quarters of household with children in school-age had a computer and 67% of them had internet access. In comparison, 57% of households without children in school-age had a computer and 50% had internet access.

2. B/ The second data show us the percentages of computer usage among children.

v School influences children’s access computers. In 1993, 61% of children used a computer at school. And in 2003, 83% of 57,000,000 used computers at school. From 1993 to 2003, the percentages of children- in 3 to17-with a computer at home increase 15%

In 2003, older children more likely to have a computer at home-70% of children age from 3 to 5 and 79% of those age from 15 to 17- and to use at home than younger ones- 95% compared with 67%.

In 2003, computer access varied by a child’s race and Hispanic origin. 85% of non Hispanic White or Asian had a computer at home compared with 54% of Black and Hispanic.

v Education of the householder is related to a child’s access to computer.47% of children live in householder with less than high school education had computer. 94% of children lived in a householder had at least a bachelor’s degree had a computer

v Family income influence with a child had a computer at home.47% of children had a computer in a household income under 25,000$ and 97% of those with a family income over 100,000.

3. C/ The third data give us the percentages of computer use among adults.

v The proportion of adults use computer anywhere jumped 46% from 1984 to 2003. And computer use was less widespread among adults than children.64% percent of adults used computer compared with 86% of children.

v In 2003, more women used computer than men. At work, women have had higher rates of computer use than men. In 1984, 29% of women used computer on the job compared with 21% of working man. In 2003, 63% of women and 51% of men used computer. And 47% women and 39% men used the internet on the job.

Introduce myself

Hi everyone,
My name is Tran Tuan Anh. I from Viet Nam, a country which is strongly growing in the world. Now I'm 17 years old. My birthday is September 24th, 1990. I have been in the US for only 2 weeks. Coming here with the main goal is study, not play, I hope we can help each other study better. My ambition is to become a successful, and rich people. And I'm trying for my best to work out this ambition.
My hobbies are playing football, badminton, watching movies( action and funny movies), reading books( picture, comedy and business books) and listening to the music( pop, and countryside). My favorite movies are Mr Bean, Pirate of Caribbean. My favorite books are Harry Porter and God father.
I like studying math and physical but I want to become a business man.
Something about my personality: Hardworking, funny, polite, and intelligent. I don't like flaunt person. And my pet peeves are someone talk to much, wait for the bus, be annoyed when I'm studying
That all about myself.
NICE TO MEET EVERYBODY