小敏同学在探究影响浮力大小的因素时,做了如图13所示的实验.请

小敏同学在探究影响浮力大小的因素时,做了如图13所示的实验.请你根据小敏的实验探究回答下列问题。  

⑴比较图一和图_,说明浸在液体中的物体会受到液体对物体的浮力作用.

⑵比较图b与图c可得到的结论是                                 

⑶为探究浮力大小跟物体浸在液体中的深度的关系,应选用图                  来研究。

⑷在图d与图e中,保持了               不变,研究                            的关系,得到的结论是                          ,这种方法叫做                。在已学过的物理中还有很多实验用到这种方法,请你举一例:                            

                                                                             

答案

(1)abcde中任一个;(2)物体受到的浮力跟物体排开液体的体积有关;(3)b,c,d;(4)体积V,浮力F,液体密度P,浸在液体中的物体受到的浮力跟液体(液体的密度)有关,控制变量法,欧姆定律等

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