如图所示,是有关家庭用电中的几个实例,其中,对图中实例的描述正确的是( )
Jim sold most of his things. He has hardly ______ left in his house.
如图,长度为5m的铁链,上端悬挂在O点,若从O点放开铁链,让其自由下落,求全链通过O点下方25m处的A点所用的时间(g取10m/s2)