如图字母A代表的是( )
A:青藏高原
B:巴西高原
C:大平原
D:亚马孙平原
学了浮力知识后,几乎所有的同学对木块一定能浮在水面上深信不疑,唯独小峰同学对此还有疑问,经过一番争论后,他找来一些器材做起了实验…
(1)他将一个边长为10cm,密度为0.6×103kg/m3的正方体木块放入水槽中,然后加入5cm深的水,请你通过计算,判断木块是否能浮起来.
(2)继续向水槽内加水,直至水深为10cm,此时木块能浮在水面上吗?这时水对槽底的压强有多大?
She reached the top of the hill and stopped _______ on a big rock by the side of the path.
— Are those shoes yours?
— No, they aren't.
— Whose shoes are they, ?
— They are Tom's.