Danh sách bài viết của Nguyễn Mỹ Hương

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Bài viết của Nguyễn Mỹ Hương

The First Law of Thermodynamics and Some Simple Processes

Beginning with the Industrial Revolution, humans have harnessed power through the use of the first law of thermodynamics, before we even understood it completely. This photo, of a steam engine at the Turbinia Works, dates from 1911, a mere ...

Tác giả: Nguyễn Mỹ Hương viết 15:13 ngày 25/05/2018 chỉnh sửa

Ultrasound

is used in medicine to painlessly and noninvasively monitor patient health and diagnose a wide range of disorders. (credit: abbybatchelder, Flickr) Any sound with a frequency above 20,000 Hz (or 20 kHz)—that is, above the ...

Tác giả: Nguyễn Mỹ Hương viết 15:13 ngày 25/05/2018 chỉnh sửa

Pressure

You have no doubt heard the word pressure being used in relation to blood (high or low blood pressure) and in relation to the weather (high- and low-pressure weather systems). These are only two of many examples of pressures in fluids. P size 12{P} {} is ...

Tác giả: Nguyễn Mỹ Hương viết 15:12 ngày 25/05/2018 chỉnh sửa

The Law of Reflection

Whenever we look into a mirror, or squint at sunlight glinting from a lake, we are seeing a reflection. When you look at this page, too, you are seeing light reflected from it. Large telescopes use reflection to form an image of stars and other astronomical ...

Tác giả: Nguyễn Mỹ Hương viết 15:12 ngày 25/05/2018 chỉnh sửa

Digestive System

All living organisms need nutrients to survive. While plants can obtain nutrients from their roots and the energy molecules required for cellular function through the process of photosynthesis, animals obtain their nutrients by the consumption of other ...

Tác giả: Nguyễn Mỹ Hương viết 15:12 ngày 25/05/2018 chỉnh sửa

Cloning and Genetic Engineering

Biotechnology is the use of artificial methods to modify the genetic material of living organisms or cells to produce novel compounds or to perform new functions. Biotechnology has been used for improving livestock and crops since the beginning of agriculture ...

Tác giả: Nguyễn Mỹ Hương viết 15:12 ngày 25/05/2018 chỉnh sửa

Leaves

are the main sites for photosynthesis: the process by which plants synthesize food. Most leaves are usually green, due to the presence of chlorophyll in the leaf cells. However, some leaves may have different colors, caused by other plant pigments that mask ...

Tác giả: Nguyễn Mỹ Hương viết 15:11 ngày 25/05/2018 chỉnh sửa

Pascal’s Principle

Pressure is defined as force per unit area. Can pressure be increased in a fluid by pushing directly on the fluid? Yes, but it is much easier if the fluid is enclosed. The heart, for example, increases blood pressure by pushing directly on the blood in an ...

Tác giả: Nguyễn Mỹ Hương viết 15:11 ngày 25/05/2018 chỉnh sửa

Kirchhoff’s Rules

Many complex circuits, such as the one in [link], cannot be analyzed with the series-parallel techniques developed in Resistors in Series and Parallel and Electromotive Force: Terminal Voltage. There are, however, two circuit analysis rules that can be used ...

Tác giả: Nguyễn Mỹ Hương viết 15:11 ngày 25/05/2018 chỉnh sửa

Basic Structure and Function of the Nervous System

The picture you have in your mind of the nervous system probably includes the brain , the nervous tissue contained within the cranium, and the spinal cord , the extension of nervous tissue within the vertebral column. That suggests it is made of two ...

Tác giả: Nguyễn Mỹ Hương viết 15:11 ngày 25/05/2018 chỉnh sửa

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The First Law of Thermodynamics and Some Simple Processes

Ultrasound

Pressure

The Law of Reflection

Digestive System

Cloning and Genetic Engineering

Leaves

Pascal’s Principle

Kirchhoff’s Rules

Basic Structure and Function of the Nervous System

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