least count of the spring balance =______ gf. zero error in the spring balance=______ gf. Correct weight of glass stopper = observed weight - zero error .___-___=__gf .mass of glass stopper =___cc.
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least count of the spring balance =100 gf. zero error in the spring balance=0 gf. Correct weight of glass stopper =60 gf observed weight - zero error .100-40=60gf .mass of glass stopper =60cc.
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