Why efficiency of energy converters is less than 100%

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).

An object in mechanical equilibrium is an object