A magnetic pickup is used to detect the shaft speed of a turbocharger. A standard hexagonal nut is used to excite the pickup. If the shaft is turning 100 revolutions per second, how many positive pulses will be created per second? By what number should the number of counts in a second be multiplied to produce a result in rpm?

Lecture 6: Dimensions and Units Outcomes Explain the difference between units and dimensions List the base (fundamental) dimensions in the SI system Identify derived dimensions and units Perform dimensional homogeneity checks on equations Explain the concept and use of dimensionless numbers Use common prefixes and prefix symbols o Table 2.6 on page 28 in text Dimensions vs units Dimensions o Used to describe or specify the nature of physical quantities o There are base and derived dimensions o Dimensions are independent of units o Examples: length, mass, force, velocity, voltage Units o Standard measure of the magnitude of a dimension with a predet