标准天平是一个等臂杠杆 ,被测物体的质量等于天平盘中砝码的总质量加上游码所对应的刻度值。怎样用不等臂天平称量物体的质量呢 ?1　等量替换法先把被测物体放在左盘 ,在右盘添加砝码 ,调节天平平衡 ,再将左盘被测物体取出 ,右盘砝码游码位置不变 ,在左盘添加砝码直到天平平衡 The standard balance is an equal arm lever. The mass of the measured object is equal to the total mass of the weight in the balance plate plus the scale value corresponding to the code. How to weigh the mass of an object using an unequal arm balance?1 Equal displacement method first put the measured object on the left disk, add the weight on the right disk, adjust balance balance, and then remove the measured object from the left disk. The weight code position is unchanged, and the weight is added to the left plate until the balance is balanced.