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Bài viết của Lê Thị Khánh Huyền

Magnetic Fields Produced by Currents: Ampere’s Law

How much current is needed to produce a significant magnetic field, perhaps as strong as the Earth’s field? Surveyors will tell you that overhead electric power lines create magnetic fields that interfere with their compass readings. Indeed, when ...

Tác giả: Lê Thị Khánh Huyền viết 15:30 ngày 25/05/2018 chỉnh sửa

Characteristics of Protists

There are over 100,000 described living species of protists, and it is unclear how many undescribed species may exist. Since many protists live as commensals or parasites in other organisms and these relationships are often species-specific, there is a huge ...

Tác giả: Lê Thị Khánh Huyền viết 15:30 ngày 25/05/2018 chỉnh sửa

The Adrenal Glands

The adrenal glands are wedges of glandular and neuroendocrine tissue adhering to the top of the kidneys by a fibrous capsule ([link]). The adrenal glands have a rich blood supply and experience one of the highest rates of blood flow in the body. They are ...

Tác giả: Lê Thị Khánh Huyền viết 15:29 ngày 25/05/2018 chỉnh sửa

Static Electricity and Charge: Conservation of Charge

Borneo amber was mined in Sabah, Malaysia, from shale-sandstone-mudstone veins. When a piece of amber is rubbed with a piece of silk, the amber gains more electrons, giving it a net negative charge. At the same time, ...

Tác giả: Lê Thị Khánh Huyền viết 15:29 ngày 25/05/2018 chỉnh sửa

Structure of Prokaryotes

There are many differences between prokaryotic and eukaryotic cells. However, all cells have four common structures: the plasma membrane, which functions as a barrier for the cell and separates the cell from its environment; the cytoplasm, a jelly-like ...

Tác giả: Lê Thị Khánh Huyền viết 15:28 ngày 25/05/2018 chỉnh sửa

Human Reproduction

As in all animals, the adaptations for reproduction in humans are complex. They involve specialized and different anatomies in the two sexes, a hormone regulation system, and specialized behaviors regulated by the brain and endocrine system. The ...

Tác giả: Lê Thị Khánh Huyền viết 15:28 ngày 25/05/2018 chỉnh sửa

Damped Harmonic Motion

In order to counteract dampening forces, this dad needs to keep pushing the swing. (credit: Erik A. Johnson, Flickr) A guitar string stops oscillating a few seconds after being plucked. To keep a child happy on a swing, you must ...

Tác giả: Lê Thị Khánh Huyền viết 15:27 ngày 25/05/2018 chỉnh sửa

Joints and Skeletal Movement

The point at which two or more bones meet is called a joint , or articulation . Joints are responsible for movement, such as the movement of limbs, and stability, such as the stability found in the bones of the skull. There are two ways to classify ...

Tác giả: Lê Thị Khánh Huyền viết 15:27 ngày 25/05/2018 chỉnh sửa

Agents of Socialization

Socialization helps people learn to function successfully in their social worlds. How does the process of socialization occur? How do we learn to use the objects of our society’s material culture? How do we come ...

Tác giả: Lê Thị Khánh Huyền viết 15:27 ngày 25/05/2018 chỉnh sửa

Multiple Slit Diffraction

An interesting thing happens if you pass light through a large number of evenly spaced parallel slits, called a diffraction grating . An interference pattern is created that is very similar to the one formed by a double slit (see [link]). A diffraction ...

Tác giả: Lê Thị Khánh Huyền viết 15:27 ngày 25/05/2018 chỉnh sửa

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Magnetic Fields Produced by Currents: Ampere’s Law

Characteristics of Protists

The Adrenal Glands

Static Electricity and Charge: Conservation of Charge

Structure of Prokaryotes

Human Reproduction

Damped Harmonic Motion

Joints and Skeletal Movement

Agents of Socialization

Multiple Slit Diffraction

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