在讲到浮力的应用时,老师向我们介绍到:比重计是测量液体密度的仪器.它由干管和躯体两部分组成.干管是一顶端密封、粗细均匀的细长圆管,熔接于躯体的上部,刻有固定的刻度.躯体底部填有适当质量的压载物(如细铅丸等),使其能竖直稳定地漂浮在液体中(如图1).由于比重计受到的重力是一定的,漂浮时,浮力等于重力,无论把它放到哪种 When talking about the application of buoyancy, the teacher introduced to us: The hydrometer is an instrument for measuring the density of liquids. It consists of two parts: the trunk pipe and the body. The trunk pipe is an elongated tube with a sealed top end and a uniform thickness, welded to the body. The upper part of the body is engraved with a fixed scale. The bottom of the body is filled with ballast (such as fine lead balls) of appropriate mass, allowing it to float vertically and stably in the liquid (Fig. 1). Gravity due to the hydrometer It is certain that when floating, buoyancy is equal to gravity regardless of where it is put