# Lab Report Archimedes Lab

897 Words4 Pages
I. INTRODUCTION
Archimedes’ principle indicates that the upward buoyant force exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid (Wikipedia), or in simpler terms, a floating object will displace a volume of fluid if it has weight equal to the object that is floating. The primary purpose of this lab is to explore and demonstrate density. Density is defined as an object’s mass per unit volume, or essentially, a measurement of how close and tightly matter is crammed together within an object. Density can be found by dividing the mass of an object by its total volume. In this experiment, a grape and beaker of water were used to act out Archimedes’ principle by adding salt to the water so the grape could float, and then add more water so the grape could be suspended in the center of the beaker. The hypothesis was that as more salt was added to the beaker, the grape would start floating since the density of the water was increased; once pure water was added, the grape would slowly start to sink due to the density of the salt water being lowered again, resulting in the suspension of the grape in the center of the beaker.

II. METHODS
To begin this experiment, 80.0mL of distilled water was measured using a graduated cylinder and promptly poured into a 100mL beaker. Next, a small grape was dropped into the beaker and automatically sunk to the