結果 : what's the definition of energy efficiency
1:04

What is energy efficiency?

EU Energy
16,047 回視聴 - 3 年前
6:01

Energy Efficiency - What does Energy Efficient Actually Mean??

Mr Baker's Science Stuff
39 回視聴 - 4 年前
5:43

What Are Sources of Energy? | Energy Explained | The Dr Binocs Show | Peekaboo Kidz

Peekaboo Kidz
833,372 回視聴 - 2 年前
26:45

What is Energy Efficiency? Need of Energy Efficiency | Examples of Energy Efficiency | Energy Audit

Paradise Educator
18,286 回視聴 - 2 年前

-
1:34

Energy Efficiency in 90 seconds

NRDC
51,763 回視聴 - 11 年前
0:40

What does Energy Efficiency mean to you?

Thomas CURELLI
18 回視聴 - 8 年前
2:41

What Does Energy Efficiency Mean?

Pushing Green
292 回視聴 - 13 年前

-
1:25

Electric Energy Efficiency

Utilita Energy
72,643 回視聴 - 5 年前
1:33

Energy Conservation vs. Energy Efficiency

IGS Energy
32,030 回視聴 - 4 年前
0:50

DEFINITION OF ENERGY SAVING AND ENERGY EFFICIENCY

nisa kamarun
35 回視聴 - 6 年前
2:26

What is Efficiency | Explained in 2 min

Productivity Guy
19,147 回視聴 - 3 年前
5:59

What You Need to Know About Appliance Energy Rating Labels

eSpares
14,582 回視聴 - 3 年前
2:35

What Is EFFICIENT ENERGY USE? EFFICIENT ENERGY USE Definition & Meaning

Audiopedia
42 回視聴 - 5 年前
2:21

TESTED! Conservation Of Energy Principle | Earth Science

BBC Earth Science
224,449 回視聴 - 7 年前
3:08

The Future of Energy: An Overview

World Economic Forum
43,659 回視聴 - 1 年前
1:33

The Law of Conservation of Energy

Alliant Energy
207,303 回視聴 - 5 年前
2:27

What Is ENERGY CONSERVATION? ENERGY CONSERVATION Definition & Meaning

Audiopedia
260 回視聴 - 5 年前
1:52

Definition of Energy Efficiency

Sahabat Cinta Al-Quran
9 回視聴 - 10 か月前
9:00

A VERY QUIET WINDOW AIR CONDITIONER!!!

Rusty78609
1,604 回視聴 - 7 時間前
3:24

GCSE Physics - Conservation of Energy #4

Cognito
373,207 回視聴 - 5 年前