To accurately measure the density of a series of small irregular solids made of plastic, wood, fiberglass, and glass, which of the following laboratory tools will a student need?
Graduated cylinder, water, weighing balance.
To accurately measure the density of small irregular solids, a graduated cylinder is needed to measure the volume of water displaced by the solids, while a weighing balance is essential for determining their mass. This combination allows for the calculation of density using the formula density = mass/volume.
This choice provides all the necessary tools for measuring density. The graduated cylinder can be used to measure the volume of water displaced by the irregular solids, while the weighing balance provides an accurate measurement of their mass. Together, these measurements enable the calculation of density.
While the weighing balance is useful for measuring mass, the inclusion of a Bunsen burner is irrelevant for measuring density, as it is not required for any part of the process. The metric ruler does not assist in finding the volume of irregular solids, making this option incomplete for the task.
Although the graduated cylinder and water are appropriate for volume measurement, the spectrophotometer is unnecessary for density measurements. It is designed for analyzing light absorption in solutions, which does not contribute to the measurement of density.
A graduated beaker can be used to measure volume, but it is generally less precise than a graduated cylinder. Additionally, the metric ruler does not provide a method for measuring the volume of irregular solids, rendering this choice insufficient for accurately determining density.
To measure the density of small irregular solids, the best option is to use a graduated cylinder, water, and a weighing balance. These tools allow for precise measurements of mass and volume, which are essential for calculating density. Other options either include irrelevant tools or lack the necessary precision, making them unsuitable for this laboratory task.
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