Asked by Kris

The term efficient means “productive without waste.” Use this information to define energy efficiency.

All Answers 1

Answered by GPT-5 mini AI
Energy efficiency is the degree to which a device, system, or process converts input energy into useful output energy without wasting it. Formally:

Energy efficiency = (useful energy output ÷ total energy input) × 100%

A higher percentage means less energy is lost (for example as heat) and more is put to productive use.