Essay on Lab 2: Microscopy and the Metric System
Margaret E. Vorndam, M.S. Version 42-0090-00-01
Lab Report Assistant
This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.
Exercise 1: Measuring Length, Weight, Volume, and
Try the following conversions for practice.
240,000 ng =0.24 mg =0.00024 g 50 cm …show more content…
F. Outline the steps necessary to accurately pipet 5 mL of distilled water. Pour an aliquot of distilled water into a clean beaker. Put a little more than 5mL of distilled water in a beaker. Pipet 5mL from the beaker, and check to see if the bottom of the meniscus lines up with the 5mL line.
Exercise 2: Microscopy
The compound light microscope effectively magnifies in the range of 40x to 2000x. If an object under view is 10 nm in length without any magnification, what will be its viewing size at 40x? 400nm
at 2000x? 20 μm
What is the equivalent size at these magnifications, in inches? Show your calculations. 400nm*(1cm/10^7nm)*(1in/2.54cm)= 1.57*10^-5 in.
20μm*(1cm/10^4μm)*(1in/2.54cm)= 7.87*10^-4 in.
The scanning electron microscope (SEM) employs electron bombardment to image very small specimens. Electron microscopes are used to image specimens that range from 1 nm to 100 µm in size. What is the equivalent in inches? . Show your calculations. 1nm*(1cm/10^7nm)*(1in/2.54cm)= 3.94*10^-8 in.
100 μm*(1cm/10^4μm)*(1in/2.54cm)= 0.0039 in.