一、填空题 1.游泳的人由河边向深水走的过程中 疼痛感觉会,原因是 2.体积相同的铁球和铜球都沉在水底 “大于”“小于”或“等于”)铁球受到的浮力. ,如果河底布满碎石子,脚的 ,铜球受到的浮力(选填 3.如图l所示,由于液体内压强与深度有关, 因此,较深处的气泡压强较大,体积较? First, fill in the blank problem 1. The person who swims from the river to the deep water will feel pain in the process, because the same volume of iron balls and copper balls sink to the bottom of the water “greater than”, “less than” or “equal to” iron. The ball is subject to buoyancy. If the bottom of the river is covered with gravel, the buoyancy of the copper ball is affected by the buoyancy of the ball (optional 3. As shown in Figure 1, the pressure inside the liquid is related to the depth, so the bubble pressure in the deeper Larger, more volume?