CMD305 Lecture Notes - Lecture 3: Sound, Root Mean Square, Inverse-Square Law
22 Jan 2020
School
Department
Course
Professor
Document Summary
Unit 1 and unit 2 are on the midterm. Things from unit 1 to recall: quantities and units (1b hw) Vector quantities: 2 values magnitude and direction: ex: displacement: change in position - 2 concepts, direction of change and distance, force is a vector quantity has a magnitude and direction. Scalar quantities: defined by magnitude alone: distance = spatial separation between two points a scalar quantity. Velocity: (v, or c if a wave such as a sound wave) = rate of change of displacement a vector. Speed: rate of change in position a direction is not considered: metric conversions. 1. 61 km = 1 mi (1 km = . 621 mi) 28. 38 g = 1 oz: calculation of velocity, acceleration, force, pressure, work, power, intensity. F = m x a (mass x area) p = f x a (force x area) W = f x d (force x distance) I = p/a (power/area: radians to degrees.
