5.Describe,and use the concept of,weight as the effect of a gravitational field on a mass. 描述和利用重力是重力场作用在物体上的效果的概念。 1.4 Density密度 1.Describe an experiment to determine the density of a liquid and of a regularly shaped solid and make the necessary calculation. 描述...
5.Describe,and use the concept of,weight as the effect of a gravitational field on a mass. 描述和利用重力是重力场作用在物体上的效果的概念。 1.4 Density密度 1.Describe an experiment to determine the density of a liquid and of a regularly shaped solid and make the necessary calculation. 描述...
7.State that,when there is no resultant force and no resultant turning effect,a system is in equilibrium.描述当合力为零并且合力矩为零时,系统保持平衡。 (d)Centre of mass质心 8.Perform and describe an experiment to determine the position of the centre of mass of a plane lamina.演示和描述一...