Science Homework Help

Prelab

Read all of Exp 2 in the lab manual.

Watch the video on propagation of error. Pay special attention to

• What is absolute error?
  • What are the two ways it can be determined?
    • Of the two ways, which way is better?
• What is relative error?
  • How is it calculated?
• How is absolute error calculated when
  • Values that have error are added or subtracted?
  • Values that have error are multiplied or divided?

Video (9:28)

PowerPoint used in video (Links to an external site.)

• Complete a prelab for this experiment in your lab notebook
  • Header of Lab, including your name, experiment number, experiment title, and the date of starting the experiment
  • Objective(s) for all parts of the experiment (written in complete sentences and not copied from the lab manual)
  • Procedure (at least a reference to the lab manual)
  • Safety – Standard lab safety procedures should be applied. There are no specific safety hazards.
  • Waste – water can be poured down the drain
  • Data tables written on a separate page (in case you need to turn in the prelab).
  • Answer the questions below
    1. The volume of a rock is measured by water displacement. Images of the results are shown below.
       • What is the absolute error in each volume measurement of the water (before and after adding the rock)?
       • What is the absolute error in the volume measurement of the rock
       • Display shows pictures
    2. What is the equation for calculating the volume of a cylinder?
    3. When a cylinder is placed on an analytical balance, the display looks like the image below. What is the absolute error for the mass?
       • 
    4. The same cylinder’s base has a diameter of 2.65 cm and a length of 15.20 cm. What is the absolute error for the volume of the cylinder?
• Read the lab notes in the next section
• Review the Assignment page for this lab, especially the grading Rubric

• For the photos I will attach them