Electronic balance and object on a string above a scale

 

Code Number: 2B40.52

Demo Title: Specific Gravity

Condition: Good

Principle: Specific Gravity

Area of Study: Fluids

Equipment: 

Electronic balance, various objects on strings, 1000 ml with water.

Procedure:

Place the beaker with water on the electronic balance and tare.  Dip the object into the water and the weight that registers on the balance is equal to the buoyant force.  Weight of the object in air divided by the buoyant force will give you the specific gravity.

References:

  • Paul L. Willems, "Specific Gravity with Electronic Balances",  TPT, Vol. 36, # 1, p. 10, Jan. 1998.