守恒

Week 4 Work and energy principle, conservation law of mechanical energy, moment of force, moment of inertia of rigid body, rotating law of rigid body with fixed axis.

第4周 功能原理、机械能守恒定律；力矩、刚体的转动惯量、刚体定轴转动定律。

On the basis of analyzing the lilnitations of the conventional flow equation for rotameter , ac-cording to principle of mechanical energy conservation and transform for real fluid, a new generalflow equation Q=for rotameter has been developed.This equation includes the rota-form factor β to reflect the influence of rota-form on flowmeasurement.

在分析转子流量计习用流量方程局限性的基础上，根据实际流体机械能守恒与转换原理，定义了反映转子形状特征对流量测定影响的转子几何形状因子β；经过推导，最终获得了转子流量计一种新的普遍流量方程Q＝。

For demonstrating about free fall、horizontal cast、stant cast、the conservation law of mechanical energy、the rule of collision、the formula of Centripetal-Force、simple periodic vibration and the vibration graph.etc.

能完成自由落体、平抛、斜抛、机械能守恒、弹性碰撞、完全非弹性碰撞、向心力、简谐振动、振动图象等高中力学实验。

This is the well-known principle of conservation of momentum.

这就是众所周知的动量守恒定律。

In this chapter we develop the implication's of momentum conservation in the motion of a collection of particles.

在本章中，我们要揭示一个质点集体作运动时动量守恒的含义。

This should obviously violate the laws of conservation of linear momentum and energy.

很显然，这违反了线性动量和能量守恒定律。

Based development of physics history,We explain the development of momentum conservation in the physics and it is universality in nature.

本文根据物理学的发展历史，说明了动量守恒概念的发展及其在自然界中的普适性。

To ensure the conservation of total momentum and energy of the system, the best discretization form of conservation equations are suggested.

在保证系统总动量和总能量守恒的基础上，提出了离散方程的理想离散形式。

This is called the 1aw of conservation of momentum .

这称为动量守恒定律。

The principle of conservation of momentum holds whatever the nature of the internal forces, conservative or not.

动量守恒原理则不管内力的性质如何都能适用。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷