PHY101. CHAPTER 1 Measurement Unit Significant Figures Dimensional Analysis. 1.1. Measurement Units. SI - International Metric System US - Customary System Basic Metric Units. SI Prefixes. Metric Line. Conversion Table. Temperature Conversion. Converting Fahrenheit to Celsius.
Converting Fahrenheit to Celsius
Converting Celsius to Fahrenheit
The number of significant figures of a numerical quantity is the number of reliably known digits it contains.
2.4m x 3.65m = 8.76m2=8.8m2 Rounded to 2 sf - because 2 is least # of sf
Example 2: Given the numbers 23.25, 0.546, and 1.058
add the first two
subtract the least number from the firstSignificant Figures - Practice
x - is the distance in m
v = is the velocity in m/s
t - is the time in s
Dimensionally the equation is:
Example 1: Is an equation x = a t2 a correct equation?
a is acceleration in m/s2Dimensional Analysis - Practice
A Boeing 777 jet has a length of 209 ft. 1 inch, and wingspan of 199 ft and 11 inches. What are these dimensions in meters?
Determine the number of significant figures:
The two sides of right triangle are 8.7 cm (two significant figures) and 10.5 cm (three significant figures). What is the area of the triangle?Practice