一、引起磁通量变化的原因 （1)稳恒磁场中的导体运动,或者回路面积变化、取向变化等

热机(heat engine)发展简介1698年萨维利和1705年纽可门先后发明了蒸汽机,当时蒸汽机的效率极低.1765年瓦特进 行了重大改进,大大提高了效率.人们一直在为提高热机的效率而努力,从理论上研究热机效率问题,一方面指明了提高效率的方向,另 一方面也推动了热学理论的发展

例1一飞轮半径为0.2m、转速为150rmin-1,因 受制动而均匀减速,经30s停止转动.试求:(1) 角加速度和在此时间内飞轮所转的圈数;(2)制动开 始后t=6s时飞轮的角速度;(3)t=6s时飞轮边缘 上一点的线速度、切向加速度和法向加速度

计算机技术、通信技术、大众传播技术的不断发展与融合,推动了多媒体技术的迅速发 展和应用的日益广泛。多媒体技术使计算机具有综合处理文字、声音、图像、视频等信息的 能力,其直观、简便的人机界面大大改善了计算机的操作方式,丰富了计算机的应用领域 多媒体技术的应用不仅渗透到了社会的各个领域改变了人类获取、处理、使用信息的方式, 还贴近大众生活,引领着社会时尚

第一节固相反应类型 第二节固相反应机理 第三节固相反应动力学 第四节影响固相反应的因素

4-1引言 4-2滑动摩擦 4-3考虑摩擦时的平衡问题 4-4滚动摩擦

In this lecture, we will derive expressions for the angular momentum and kinetic energy of a 3D rigid body. We shall see that this introduces the concept of the Inertia Tensor. Angular Momentum We start form the expression of the angular momentum of a system of particles about the center of mass

In this lecture, we will consider how to transfer from one orbit, or trajectory, to another. One of the assumptions that we shall make is that the velocity changes of the spacecraft, due to the propulsive effects, occur instantaneously. Although it obviously takes some time for the spacecraft to accelerate to the velocity of the new orbit, this assumption is reasonable when the burn time of the rocket is much smaller than the period of the orbit. In such cases, the Av required to do the maneuver is simply the difference between the

When the only force acting on a particle is always directed to- wards a fixed point, the motion is called central force motion. This type of motion is particularly relevant when studying the orbital movement of planets and satellites. The laws which gov- ern this motion were first postulated by Kepler and deduced from observation. In this lecture, we will see that these laws are a con- sequence of Newton's second law. An understanding of central

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