A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
Energy is being wasted if a toaster is left plugged in after use.
21
There's an "anti-smartphone" called John's Phone which can only make and receive calls.
7
More steel in the United States is used to make bottle caps than to manufacture automobile bodies.
55
Any modern jet is capable of breaking the sound barrier.
34


