质量为1kg的物体所受重力大小是 ______N．将其全部浸没在水中时，所排开水的重力为20N，放手后物体将 ______（选填“上浮”、“下沉”或“悬浮”），最终当物体静止时，物体所排开水的重力是 ______N．（g=10N/kg，ρ水=1.0×103kg/m3）
物体所受的重力：G=mg=1kg×10N/kg=10N；
根据阿基米德原理：F浮=G排=20N，
因为F浮＞G，所以放手后物体将上浮；
当物体静止时，物体处于漂浮状态，此时F浮′=G=10N，由阿基米德原理可知，此时排开的水重是10N．
故答案为：10，上浮，10．
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| Xiao Ling has a good friend . 1 name is Lucy . She is from America . Xiao Ling and Lucy are in 2 same school . 3 they are in different classes . They go to school from 4 to Friday . They stay at 5 on Sundays . Lucy likes China and 6 food . She likes rice and cakes best . At school they play football 7 class . Xiao Ling and Lucy like making things . They 8 many model planes ,and fly them on Sundays . Lucy 9 English and they often help 10 other .
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