Measurement instruments(Mass, Volume and Density) Alma RomeroMay 29, 20181.The smallest value that can be measured by the measuring instrument is called its least count. For example; In 10 cm scale having 10 div for 1 cm we have 1 mm as least count. Also, we can have decimal places up to that least count only.2.Laboratory balance measures the weight of an unknown mass; therefore, balance measure the mass subjected to the acceleration due to gravity. The instrument is so calibrated that we can take the mass of object in grams.3.The vernier caliper is a precision instrument that can be used to measure internal and external distances very accurately, without using the vernier scale we can read only the smallest division on the main scale, say 1mm. Vernier scale extends precision by increasing the number of divisions that can be read. But accuracy could still be wrong if the scale is not calibrated properly.4.Zeroing is systematic error correction, if the error is positive then we should subtract the error
