You may not think of salt and sugar as solids because when you see them in the kitchen they are such small particles. But each of these particles is as much a solid as a wooden table, a glass window, or a gold piece of jewelry. A solid is a collection of atoms or molecules that are held together so that, under constant conditions, they maintain a defined shape and size.
Pulse Width Modulation, or PWM, is a technique for getting analog results with digital means. Digital control is used to create a square wave, a signal switched between on and off.
What does a Warehouse Management System ( WMS ) do? A warehouse management system is used to control and track the transfer and storage of materials in a warehouse. The system involves a number of processes that are important when shipping, receiving, or even putting away materials and integrates with other systems in the supply chain to ensure data transparency throughout your enterprise.