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6、AN.MsoHyper1inkCO1OR:b1ue;TEXT-DECORATION:under1ineDIV.MyFav_08A:visitedCO1OR:purp1e;TEXT-DECORATION:under1ineDIV.MyFav_08SPAN.MsoHyper1inkFo11owed1CO1OR:purp1e;TEXT-DECORATION:under1ineDIV.MyFav_08DIV.Section1page:Section1)一、选择题1.A2,B3.D4.C5.C6.C7.B8.D9.A10.B11.B12.C13.B14.C15.D16.D17.C18.C19.C20.A
7、21.C二、填空题22.不变,不变;23.空心的,轮船;24.等于;25.相等,相等;26.甲,丙,相等,相等;27.变大,变小;28.12.5;29.减小压力,增加受力面积;30.8.76X107牛;31.1.5X103立方分米,0.67X103Kg3;32.压力,每平方米面积上受到的压力是20牛;33.更大,减小;34.压强。三、实验题35. (1)在量筒中放入适量的水,读出体积VI;(2)用细线拴住油泥,浸没在量桶中,读出体积V2;3)再把油泥做成空心,使其漂浮在水面上,读出体积V3;(4)根据G=F浮=P水gV3-V1),算出油泥的重力;(5)根据V=V2-V1算出油泥的体积;(6)根据P=GVg,算出油泥的密度。四、计算题36. 129牛,69牛37. 50牛38. 19.5牛,1.95X103帕