PRACTICALS S.No. NAME OF THE EXPERIMENT MONTH PHYSICS Determination of weight of an object using the principle of moments June Determination of focal length of a convex lens July Determination of resistivity September CHEMISTRY Identification o the dissolution of the given salt whether it is exothermic or endothermic June Testing the solubility of the salt July Testing the water of hydration of salt August Test the given sample for the presence of acid or base October BIO-BOTANY Photosynthesis-Test tube and Funnel Experiment (Demonstration) June Parts of a Flower August Mendel's Monohybrid cross August Observation of Transverse Section of Dicot stem and Dicot Root October BIO-ZOOLOGY Observation of Models-Human Heart and Human Brain July Identification of Blood Cells August Identification of Endocrine Glands October minutes for each practical Practicals . DETERMINATION OF WEIGHT OF AN OBJECT USING THE PRINCIPLE OF MOMENTS Aim: To determine the weight of an object using the principle of moments Apparatus required: A metre scale, a knife edge, slotted weights, thread Procedure: i. A metre scale is supported at its centre of gravity by a knife edge or suspended by using a thread tied to its centre so that the scale is in the horizontal position.
Ensure that the scale is in equilibrium position. ii. A known weight W and an unknown weight W are suspended from to either side of the the scale using the weight hangers. iii.
Fix the position of one weight hanger and adjust the position of the second weight hanger such that the scale is in equilibrium. iv. Measure the distance d and d of the two weight hangers from the centre of the scale accurately. v.
The experiment is repeated for different positions of the unknown weight. Measure the distances. The reading are tabulated as follows: Observation: S.No Weight in the wieght hanger(W2) kg Distance of known wieght d (m) Distance of unknown wieght d (m) W × d (kg m) Unknown