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Bài viết của Trần Bảo Ngọc

Variation of Pressure with Depth in a Fluid

If your ears have ever popped on a plane flight or ached during a deep dive in a swimming pool, you have experienced the effect of depth on pressure in a fluid. At the Earth’s surface, the air pressure exerted on you is a result of the weight of air above ...

Tác giả: Trần Bảo Ngọc viết 14:57 ngày 25/05/2018 chỉnh sửa

The Cell Cycle

The cell cycle is an ordered series of events involving cell growth and cell division that produces two new daughter cells. Cells on the path to cell division proceed through a series of precisely timed and carefully regulated stages of growth, DNA ...

Tác giả: Trần Bảo Ngọc viết 14:57 ngày 25/05/2018 chỉnh sửa

Introduction to the Physics of Hearing

This tree fell some time ago. When it fell, atoms in the air were disturbed. Physicists would call this disturbance sound whether someone was around to hear it or not. (credit: B.A. Bowen Photography) If a tree ...

Tác giả: Trần Bảo Ngọc viết 14:57 ngày 25/05/2018 chỉnh sửa

Eddy Currents and Magnetic Damping

As discussed in Motional Emf, motional emf is induced when a conductor moves in a magnetic field or when a magnetic field moves relative to a conductor. If motional emf can cause a current loop in the conductor, we refer to that current as an ...

Tác giả: Trần Bảo Ngọc viết 14:57 ngày 25/05/2018 chỉnh sửa

Capacitors and Dielectrics

A capacitor is a device used to store electric charge. Capacitors have applications ranging from filtering static out of radio reception to energy storage in heart defibrillators. Typically, commercial capacitors have two conducting parts close to one ...

Tác giả: Trần Bảo Ngọc viết 14:56 ngày 25/05/2018 chỉnh sửa

Introduction to Statics and Torque

On a short time scale, rocks like these in Australia’s Kings Canyon are static, or motionless relative to the Earth. (credit: freeaussiestock.com) What might desks, bridges, buildings, trees, and mountains ...

Tác giả: Trần Bảo Ngọc viết 14:56 ngày 25/05/2018 chỉnh sửa

An Overview of the Endocrine System

Communication is a process in which a sender transmits signals to one or more receivers to control and coordinate actions. In the human body, two major organ systems participate in relatively “long distance” communication: the nervous system and the ...

Tác giả: Trần Bảo Ngọc viết 14:56 ngày 25/05/2018 chỉnh sửa

Aberrations

Real lenses behave somewhat differently from how they are modeled using the thin lens equations, producing aberrations . An aberration is a distortion in an image. There are a variety of aberrations due to a lens size, material, thickness, and position ...

Tác giả: Trần Bảo Ngọc viết 14:56 ngày 25/05/2018 chỉnh sửa

Physics of the Eye

The eye is perhaps the most interesting of all optical instruments. The eye is remarkable in how it forms images and in the richness of detail and color it can detect. However, our eyes commonly need some correction, to reach what is called ...

Tác giả: Trần Bảo Ngọc viết 14:56 ngày 25/05/2018 chỉnh sửa

The Photoelectric Effect

When light strikes materials, it can eject electrons from them. This is called the photoelectric effect , meaning that light ( photo ) produces electricity. One common use of the photoelectric effect is in light meters, such as those that adjust the ...

Tác giả: Trần Bảo Ngọc viết 14:56 ngày 25/05/2018 chỉnh sửa

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Variation of Pressure with Depth in a Fluid

The Cell Cycle

Introduction to the Physics of Hearing

Eddy Currents and Magnetic Damping

Capacitors and Dielectrics

Introduction to Statics and Torque

An Overview of the Endocrine System

Aberrations

Physics of the Eye

The Photoelectric Effect

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