ITT Technical Institute

Framingham, Massachusetts

Quarter 6 Electronics Physics

Instructor: Paul BurneyName __________________________________

Units, Measurement, Dimensional Analysis

(Test #1)

Instructions:Please solve the following problems. Credit will be given for work completed so make sure to show it! Some helpful information can be found below.

1) Refer to the list of numbers below:

305.0 cm 0.0500 mm 1.00081 kg 8.06 x 104 m ^{2}

a) Which of the numbers has the most significant figures? (5 points)

b) Which number is measured least accurately? (5 points)

2) Make the following conversions:

a) 1254 kg to pounds (7 points)

b) 9.7 years to seconds (7 points)

c) 85 mph to km/h (7 points)

d) 25 feet to centimeters (7 points)

e) 24.7 liters to cubic meters (7 points)

f) 11.2 km/s to mi/h (7 points)

g) 412 nm to meters (7 points)

3) The minimum weight to qualify for a boxing match is 180 pounds. If a contender has a mass of 80kg, can he compete? (10 points)

4) An Australian rancher has a ranch that is 500,000 square feet. A New Zealand rancher has a ranch that is 48,000 square meters. Which rancher has a bigger ranch? (10 points)

5) A student uses an equation like the one below to find distance. Is the equation appropriate for finding distance? Use dimensional analysis to show why or why not. (10 points)

x = at + (vt

^{2})/2

6) Can you use the following equation to solve for acceleration in meters per second per second (m/s/s or m/s2) if velocity is measured in m/s and time is measured in minutes? Use unit analysis to show why or why not. (10 points)

a = v/t