Question

question 20: which method is used to verify that units cancel appropriately in a calculation?
a. dimensional analysis
b. graphical integration
c. statistical averaging
d. numerical estimation
question 21: true or false: dimensional analysis helps verify that both sides of an equation have the same units.
a. true
b. false
question 22: true or false: conversion factors must be expressed as ratios equal to one.

Explanation:

• Question 20: Dimensional analysis checks unit - consistency in calculations by ensuring units cancel appropriately.
• Question 21: Dimensional analysis is used to verify that both sides of an equation have the same units.
• Question 22: Conversion factors are ratios equal to one (e.g., 1 m/100 cm = 1) for unit - conversion.

Answer:

Question 20: A. Dimensional analysis
Question 21: a. True
Question 22: a. True