“speed”的概念、定义、翻译、参考文献-科学参考

speed

Physics

The ratio of a distance covered by a body to the time taken. Speed is a scalar quantity, i.e. no direction is given. Velocity is a vector quantity, i.e. both the rate of travel and the direction are specified.

Mathematics

In mathematics, it is useful to distinguish between velocity and speed. First, when considering motion of a particle in a straight line, specify a positive direction so that it is a directed line. Then the velocity of the particle is positive if it is moving in the positive direction and negative if it is moving in the negative direction. The speed of the particle is the absolute value of its velocity. In higher dimensions, when the velocity is a vector v, the speed is the magnitude |v| of the velocity.

Chemical Engineering

The rate of change of distance with time. It is a scalar quantity and has the SI units of m s⁻¹. Velocity is the speed of a body in a specified direction and is therefore a vector quantity.

Computer

of a computer. A rather vaguely defined term that is often used to indicate the relative processing power of a given computer system, since the power of a computer is largely governed by the ability of the central processing unit to execute instructions rapidly. The CPU’s speed is itself dependent on numerous factors such as word length, instruction set, technology of implementation, and memory access times.

单词	speed
释义	speed Physics The ratio of a distance covered by a body to the time taken. Speed is a scalar quantity, i.e. no direction is given. Velocity is a vector quantity, i.e. both the rate of travel and the direction are specified. Mathematics In mathematics, it is useful to distinguish between velocity and speed. First, when considering motion of a particle in a straight line, specify a positive direction so that it is a directed line. Then the velocity of the particle is positive if it is moving in the positive direction and negative if it is moving in the negative direction. The speed of the particle is the absolute value of its velocity. In higher dimensions, when the velocity is a vector v, the speed is the magnitude \|v\| of the velocity. Chemical Engineering The rate of change of distance with time. It is a scalar quantity and has the SI units of m s⁻¹. Velocity is the speed of a body in a specified direction and is therefore a vector quantity. Computer of a computer. A rather vaguely defined term that is often used to indicate the relative processing power of a given computer system, since the power of a computer is largely governed by the ability of the central processing unit to execute instructions rapidly. The CPU’s speed is itself dependent on numerous factors such as word length, instruction set, technology of implementation, and memory access times.
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