- 1 6 Bài soạn "Cách làm bài văn nghị luận về một đoạn thơ, bài thơ" lớp 9 hay nhất
- 2 6 Bài soạn "Chủ đề và dàn bài của bài văn tự sự" lớp 6 hay nhất
- 3 6 Bài soạn "Đề văn biểu cảm và cách làm bài văn biểu cảm" lớp 7 hay nhất
- 4 6 Bài soạn "Cách làm bài văn biểu cảm về tác phẩm văn học" lớp 7 hay nhất
- 5 10 Bài văn so sánh hình ảnh người lính trong hai bài thơ "Đồng chí" và "Bài thơ về tiểu đội xe không kính" lớp 9 hay nhất
- 6 6 Bài soạn "Đề văn thuyết minh và cách làm bài văn thuyết minh" hay nhất
- 7 8 Bài văn cảm nhận về khổ thơ cuối bài "Sang thu" của Hữu Thỉnh lớp 9 hay nhất
- 8 6 Bài soạn "Tìm hiểu đề và cách làm bài văn tự sự" lớp 6 hay nhất
- 9 5 Bài soạn Phân tích đề, lập dàn ý bài văn nghị luận (Ngữ Văn 11) hay nhất
- 10 6 Bài soạn "Luyện tập: Đưa yếu tố biểu cảm vào bài văn nghị luận" lớp 8 hay nhất
Overview of Photosynthesis
All living organisms on earth consist of one or more cells. Each cell runs on the chemical energy found mainly in carbohydrate molecules (food), and the majority of these molecules are produced by one process: photosynthesis. Through photosynthesis, certain ...
The Genome
The continuity of life from one cell to another has its foundation in the reproduction of cells by way of the cell cycle. The cell cycle is an orderly sequence of events in the life of a cell from the division of a single parent cell to produce two new daughter ...
The Scope of Ecology
Ecology is the study of the interactions of living organisms with their environment. One core goal of ecology is to understand the distribution and abundance of living things in the physical environment. Attainment of this goal requires the integration of ...
The First Condition for Equilibrium
The first condition necessary to achieve equilibrium is the one already mentioned: the net external force on the system must be zero. Expressed as an equation, this is simply ...
GUTs: The Unification of Forces
Present quests to show that the four basic forces are different manifestations of a single unified force follow a long tradition. In the 19th century, the distinct electric and magnetic forces were shown to be intimately connected and are now collectively ...
Introduction to Frontiers of Physics
This galaxy is ejecting huge jets of matter, powered by an immensely massive black hole at its center. (credit: X-ray: NASA/CXC/CfA/R. Kraft et al.) Frontiers are exciting. There is mystery, surprise, adventure, ...
Theoretical Perspectives
Sociologists develop theories to explain social occurrences such as protest rallies. (Photo courtesy of voanews.com/Wikimedia Commons) Sociologists study social events, interactions, and patterns. They then develop theories to explain ...
Nerve Conduction–Electrocardiograms
Electric currents in the vastly complex system of billions of nerves in our body allow us to sense the world, control parts of our body, and think. These are representative of the three major functions of ...
The Four Basic Forces
As first discussed in Problem-Solving Strategies and mentioned at various points in the text since then, there are only four distinct basic forces in all of nature. This is a remarkably small number considering the myriad phenomena they explain. Particle ...
More Applications of Magnetism
The curved paths followed by charged particles in magnetic fields can be put to use. A charged particle moving perpendicular to a magnetic field travels in a circular path having a radius r size 12{r} {}. ...




