Answer:
A, C and D
Step-by-step explanation:
A digital scale is a measuring device used to measure the weight of an object. Unlike the mechanical version, the digital scale displays the numeric value of an object weight on a screen, that is, it does not use any mechanical part like a pointer.
To design this scale, the engineers heard to understand the principles of electric current which powers the device, the influence of gravitational force on objects for which a sensor is used to collect the weight of objects and convert it to digits, and the physical and chemical properties of materials used in building the digital scale circuits.