Calculate energy efficiency given relevant data.

Question 1

What is the formula to calculate energy efficiency?

Answer 1

How to calculate the energy efficiency of something:
Energy efficiency = Power x Time

Question 2

If Power is usually in the unit watts, Time is in seconds and Energy is in joule. what unit do you put the answer in?

Answer 2

Percentage

Question 3

Mixer A used 31 watts and took 30 seconds to make a smoothie and mixer B used 23 watts and took 40 seconds which is more energy efficient?

Answer 3

31 x 30 = 930
23 x 40 = 920
The more energy efficient mixer is mixer B.

Question 4

31 x 30 = 930
23 x 40 = 920
What does the numbers 31 and 23 represent?

Answer 4

The power

Question 5

31 x 30 = 930
23 x 40 = 920
What does the numbers 30 and 40 represent?

Answer 5

The time it took

Question 6

The answer is 930 and 920 how do you put that in a percentage? ONLY DO THIS IF THE QUESTION DIRECTLY ASKS YOU TO!!!!!!!!!!

Answer 6

930/100 = 9.3%
920/100 = 9.2%