八年级上册几道物理题(请写过程或附带解题思路),
八年级上册几道物理题(请写过程或附带解题思路),
(1)如何使用空矿泉水瓶、天平、水测量牛奶的密度.
A .
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B .牛奶密度表达式为:Ρ牛=_________________
(2)实验室现有水槽、水、烧杯、量筒,如何利用上述器材测量矿石的密度.
写出实验步骤及矿石密度的表达式,矿石能放入烧杯中.
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(3)某实验需要用盐水,要求盐水的密度是1.1g/m³,现配制了0.5dm³的盐水,称得盐水质量是0.6kg.这种盐水是否符合要求?若不符合要求,应该加盐还是加水?加多少?(盐水和水混合后,体积不会变小)
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