Physics Lab
Experiment 5: Relative Density
Patrick Erlo Reyes, Joseph Winfred Sajul, La Reyna Roshele Salenga,
Luisito Jeremiah Samonte, Christine Bernadette Sanchez
Department of Biology
College of Science, University of Santo Tomas
España, Manila, Philippines
Abstract This experiment is concerned with the densities of objects. The first activity is determining the density of a cylinder through displacement method and by weighing. The second activity is finding the density of a bone and determining it whether it is osteoporosis, osteopenia, or osteopetrosis. The last activity determines the density of a regular and diet soft drink in relation with the density of water in which a pycnometer was used to get their densities.
1. Introduction
Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water. The term "relative density" is often preferred in modern scientific usage. If a substance 's relative density is less than one then it is less dense than the reference; if greater than 1 then it is denser than the reference. If the relative density is exactly 1 then the densities are equal; that is, equal volumes of the two substances have the same mass. If the reference material is water then a substance with a relative density less than 1 will float in water. A substance with a relative density greater than 1 will sink.
Relative density (RD) or specific gravity (SG) is a dimensionless quantity, as it is the ratio of either densities or weights.
The principle used in this experiment was the Archimedes ' Principle. Archimedes ' principle is named after Archimedes of Syracuse, who first discovered this law in 212 B.C, he stated that: “Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.” It is stated in the principle that objects weigh more in air than they do in
Patrick Erlo Reyes, Joseph Winfred Sajul, La Reyna Roshele Salenga,
Luisito Jeremiah Samonte, Christine Bernadette Sanchez
Department of Biology
College of Science, University of Santo Tomas
España, Manila, Philippines
Abstract This experiment is concerned with the densities of objects. The first activity is determining the density of a cylinder through displacement method and by weighing. The second activity is finding the density of a bone and determining it whether it is osteoporosis, osteopenia, or osteopetrosis. The last activity determines the density of a regular and diet soft drink in relation with the density of water in which a pycnometer was used to get their densities.
1. Introduction
Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water. The term "relative density" is often preferred in modern scientific usage. If a substance 's relative density is less than one then it is less dense than the reference; if greater than 1 then it is denser than the reference. If the relative density is exactly 1 then the densities are equal; that is, equal volumes of the two substances have the same mass. If the reference material is water then a substance with a relative density less than 1 will float in water. A substance with a relative density greater than 1 will sink.
Relative density (RD) or specific gravity (SG) is a dimensionless quantity, as it is the ratio of either densities or weights.
The principle used in this experiment was the Archimedes ' Principle. Archimedes ' principle is named after Archimedes of Syracuse, who first discovered this law in 212 B.C, he stated that: “Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.” It is stated in the principle that objects weigh more in air than they do in
References: [1] Retrieved from http://chemistry.about.com/od/chemistrylabexperiments/ig/Chemistry-Laboratory-Glassware/Pycnometer.htm July 30, 2013 [2]http://physics.weber.edu/carroll/archimedes/principle.htm