Laboratory Report

The report of the experiment should present the information well organized order under various heads like.

  1. Aim of the experiment
  2. Apparatus required
  3. Principle
  4. Procedure
  5. Calculation
  6. Result


****Impersonal Passive Structure is used in the report

EX : 1

I have read in science books that the specific gravity of a solid can be calculated by dividing the weight of the solid by the apparent loss of its weight in liquid. I observed this in ht following experiment

I tied a glass stopper to one end of a piece of thread and suspended it from the hook of a piece of thread and suspended it from the hook of the left pan of a physical balance. I determined the weight of the stopper to the nearest 0.1 gram as w1. I placed across the left pan a hydrostatic bench with a beaker of water. I was cautious that the solid did not touch the sides or the bottom of the beaker. Now I weighed the stopper and it was W2 grams. I calculated the specific gravity of the glass stopper using the formula.

The passage provides the details about the experiment. The information given has to be organized into a laboratory report.

Read the following:

  1. Aim of the experiment


The object of this experiment was to find out the specific gravity of the given glass stopper.

2. Apparatus required:


a. Glass stopper


b. Physical balance


c. Beaker


d. Thread


3. Principle:


The specific gravity of solid can be calculated by dividing the weight of the solid by the apparent loss of its weight in liquid. Archimedes principle is involved in this experiment


4.Procedure:


The given glass stopper was tied to one end of the thread. The other end of the thread was tied with the hook of the left pan of a physical balance. The weitht of the stopper in air was then calculated and corrected to the nearest 0.1 gram. The weight of the galss stopper was noted as W1 gram. A hydrostatic bench was placed across the left pan of the physical balance and a beaker with water was placed on it. The glass stopper was gently lowered into the beaker of water. The glass stopper ws completely immersed in water. Air bubbles were removed form the glass stopper. The weight of the glass stopper in water was noted as W2 garms.


5. Calculation


a. Weight of the glass stopper (in air) = w1 gram

b. Weight of the glass stopper (in water) = w2 gram,

c. Loss of weight = (w1-w2) gram

d. The specific gravity of the given glass stopper w1

= “g”

w1-w2


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