Practice Problems 1
1
.You measure the mass of a physics textbook to be 1.63±0.08 kg, and use this value to
estimate the total mass of 500 identical physics textbooks in the bookstore. What is the
absolute uncertainty in your estimate of the total mass?
Answer:
4e+01 kg
2
. What is the relative uncertainty in your estimate of the total mass?
Answer:
5e02
3
. What is the relative uncertainty in your original measurement of the mass of a single
book ?
Answer:
5e02
4
. A physics textbook is 42±1 mm thick, and a math textbook is 48±2 mm thick. If the
two are placed sidebyside on a bookshelf, what is the most likely value of the total
space (length of shelf) they will occupy?
Answer:
90 mm
5.
What is the absolute uncertainty in the shelf space needed?
Answer:
3 mm
6
. What is the relative uncertainty in the shelf space needed?
Answer:
3e02
7
. A gravel truck is weighed as it arrives at a construction site, and weighed again as it
leaves, after dumping some of its gravel. The loaded truck had a mass of
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '08
 N. MCKAY
 Physics, mechanics, Mass, Fundamental physics concepts, relative uncertainty, Gravel

Click to edit the document details