her is Chi

her name is chi

(ten cô ấy là chi )

I am in class 4a2.

Iam in class 4C.

Where does energy come from ?

Energy can be found in many things and takes many forms. There is potential energy in objects at rest that will make them move if resistance is removed. There is kine energy in objects that are moving. The molecules making up all matter contains a huge amount of energy, as Einstein's E = mc^{^2} pointed out to us. Energy can also travel in the form of electromagne waves, such as heat, light, radio, and gamma rays. Your body is using metabolic energy from your last meal as you read this. Energy is constantly flowing and changing form. If you take your metabolic energy and rub your hands together, you have made metabolic energy into mechanical energy. Your hands will heat up. That is some of the mechanical energy turning into heat energy.

So energy can change form, but where did that energy ultimately come from? Let's trace back a chain of events. A bicycle is rolling down the hill, transferring potential energy into kine (movement) energy. The bicycle got its potential energy (energy due to position related to gravity) by the rider using metabolic energy to move the pedals. The pedals used mechanical energy to move the chain, which moved the wheels. The rider's metabolic energy came from chemical energy that was stored in the molecules of the food she ate. That chemical energy entered the animal whose meat she ate by the animal digesting a plant and breaking the bonds in its molecules. The plant made the molecules by using light energy from the Sun. The Sun's light energy came from electrons in its atoms lowering energy states, and releasing energy. The energy in the atoms came from the nuclear reactions in the heart of the Sun. What started the nuclear reactions? Physicists think the Big Bang did.

So the short answer is that the energy we encounter and use everyday has always been with us since the beginning of the universe and always will be with us. It just changes form all around us. That is called the law of conservation of energy.

????????????

weak ớ

Weak

Good Study

tomorow là tomorrow

goods là good

yu là you

See you tomorrow

Good night

Seeyou again

Viết một bài luận về bản thân bạn!

Chúc bạn vui vẻ khi làm bài tập!

Học tập tốt!

bạn làm bài ấy cơ

line number 3

Chữ W ở dòng thứ 3, cách 7 chữ M tính từ bên phải vào

Bạn ko nên hỏi những câu linh tinh lên diễn đàn OLM là ko đc, nếu có câu hỏi thì phải hỏi đàng hoàng nha bạn

I LOVE YOU TOO

I. Nội qui tham gia "Giúp tôi giải toán"

1. Không đưa câu hỏi linh tinh lên diễn đàn, chỉ đưa các bài mà mình không giải được hoặc các câu hỏi hay lên diễn đàn;

2. Không trả lời linh tinh, không phù hợp với nội dung câu hỏi trên diễn đàn.

3. Không "Đúng" vào các câu trả lời linh tinh nhằm gian lận điểm hỏi đáp.

Các bạn vi phạm 3 điều trên sẽ bị giáo viên của Online Math trừ hết điểm hỏi đáp, có thể bị khóa tài khoản hoặc bị cấm vĩnh viễn không đăng nhập vào trang web.

There are 4 people in my family, dad, mom, brother and younger brother. In my family is the youngest, always pampered by everyone. Both parents work in companies a few trees away from home. In the morning, parents often have to go to work very early. My parents did not come home until evening. Usually the mother will be the one to go home earlier to prepare the meal. When dad comes home, the rice soup is ready. This year my brother is a high school student. His studies are also heavier than before. You say studying in high school is different from studying at primary school you. There are subjects that I have yet to learn. Once, I eagerly used your book to read. But as a result, I still don't have enough knowledge to understand what people write in the book. Also because I learned through my program, so I can help you with your studies. There are any difficult math problems, I ask you to sing. The lectures are easy for you to understand. Only a moment you can speak the subject's knowledge. My family has a habit of watching the show The Road to Olympia together every weekend. This is a complementary program knowledge for the student's age. Most of the questions you can answer. I only answer a few questions only. Brothers say to the 12th grade, he will also register to paripate in the program. When I am with my family, each day goes by very special. I wish my family is always as happy.

There are 4 people in my family, dad, mom, brother and younger brother. In my family is the youngest, always pampered by everyone. Both parents work in companies a few trees away from home. In the morning, parents often have to go to work very early. My parents did not come home until evening. Usually the mother will be the one to go home earlier to prepare the meal. When dad comes home, the rice soup is ready. This year my brother is a high school student. His studies are also heavier than before. You say studying in high school is different from studying at primary school you. There are subjects that I have yet to learn. Once, I eagerly used your book to read. But as a result, I still don't have enough knowledge to understand what people write in the book. Also because I learned through my program, so I can help you with your studies. There are any difficult math problems, I ask you to sing. The lectures are easy for you to understand. Only a moment you can speak the subject's knowledge. My family has a habit of watching the show The Road to Olympia together every weekend. This is a complementary program knowledge for the student's age. Most of the questions you can answer. I only answer a few questions only. Brothers say to the 12th grade, he will also register to paripate in the program. When I am with my family, each day goes by very special. I wish my family is always as happy.